Rheem ECO200DVELP-3 Smart Indoor Liquid Propane Tankless User Manual

With Installation Instructions for the Installer

Noncondensing 199,900 Btu/h, 180,000 Btu/h,

and 160,000 Btu/h Models

Do not destroy manual. Please read carefully and

keep in a safe place for future reference.

CERTIFIED

Print 2D

Bar Code

Here

www.ahridirectory.org

ULTRA

Low NOx

Emissions

SCAQMD Rule 1146.2

WARNING:

If the information in these instructions is not

followed exactly, a ﬁre or explosion may result,

causing death, personal injury, or property dam-

age.

For Your Safety!

• Do not store or use gasoline or other ﬂammable

vapors and liquids in the vicinity of this or

any other appliance. To do so may result in an

explosion or ﬁre.

• Installation and service must be performed by

a qualified installer, service agency, or the gas

supplier.

HIGH-EFFICIENCY NON-CONDENSING

TANKLESS WATER HEATER

USE AND CARE MANUAL

What to Do If You Smell Gas

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use

any phone in your building.

• Immediately call your gas supplier from a

neighbor’s phone. Follow the gas supplier’s

instructions.

• If you cannot reach your gas supplier, call the

fire department.

• Do not return to your home until authorized by

the gas supplier or fire department.

AP22009 Rev 03

Safety

Important Safety Information

Safety Precautions �� 2 – 8

Product Information

Product Information �� 8

Specifications �� 9, 10

Flow Rate vs Pressure Drop RTGH-Series-3 ��11

General Descriptions ��12, 13

Installation Instructions

Standards Compliance ��15

Choosing a Location �� 15, 16

Product Inspection �� 17

Water Heater Installation �� 17 – 20

Venting and High-Altitude Adjustments �� 21 – 34

Water Quality/Supply �� 35 – 39

Gas Supply �� 39 – 44

Electrical Wiring ��45

Remote Control Selection and Location ��46

Remote Control Installation ��47

WiFi Remote Installation ��48, 49

Insulation Blankets and Installation Precautions ��50

Installation Checklist ��51

Using Your Water Heater

Activating the Water Heater ��52

Operating Instructions ��53

Setting the Water Temperature ��54 – 58

WiFi Set-up �� 58

Piping for Space Heaters ��59

Recirculation Pump Control �� 60 – 63

Water Saving Control Option ��64, 65

Caring for Your Water Heater

Water Heater Inspections �� 66, 67

Care and Cleaning ��68, 69

Preventive Maintenance �� 70

Draining the Water Heater ��71 – 72

Freeze Protection �� 73

Vacation and Extended Shutdown �� 74

Troubleshooting Chart�� 74, 75

Service Error Code Chart �� 76, 77

Call for Assistance ��77

Maintenance Notice Option ��78, 79

If You Need Service

Parts Ordering ��80, 81

Warranty Information��82, 83

CONTENTS

READ THE SAFETY INFORMATION

Your safety and the safety of others are very important. There

are many important safety messages in this manual and on

your appliance. Always read and obey all safety messages.

This is the safety alert symbol. Recognize this

symbol as an indication of Important Safety

Information! This symbol alerts you to potential

hazards that can kill or hurt you and others.

All safety messages will follow the safety alert symbol

and either the word “DANGER,” “WARNING,” “CAUTION,”

or “NOTICE.”

These words mean:

IMPORTANT SAFETY INFORMATION

WARNINGS:

• Improper installation, adjustment, alteration, service,

or maintenance can cause death, personal injury, or

property damage. Follow the instructions in this manual.

READ ALL INSTRUCTIONS

BEFORE USING.

Be sure to read and understand the entire Use and Care Manual

before attempting to install or operate this water heater� It may

save you time and money� Pay particular attention to the Safety

Instructions� Failure to follow these warnings could result

in death or serious bodily injury� Should you have problems

understanding the instructions in this manual, or have any

questions, STOP and get help from a qualified service technician

or the local gas utility�

DANGER:

NOTICE:

CAUTION:

WARNING:

An imminently hazardous

situation that will result in

death or serious injury.

A potentially hazardous

situation that can result in

death or serious injury and/or

damage to property.

A potentially hazardous

situation that may result in

minor or moderate injury.

Attention is called to observe a

specified procedure or maintain

a specific condition.

Safety

DANGER

FLAMMABLES

Flammable Vapors

Water heater has a main

burner flame.

The main burner flame:

1. which can come on

at any time and

2. will ignite flammable

vapors.

Vapors:

1. cannot be seen,

2. are heavier than air,

3. go a long way on the

floor and

4. can be carried from

other rooms to the

main burner flame by

air currents.

Vapors from flammable

liquids will explode and

catch fire causing death or

severe burns.

Do not use or store flammable

products such as gasoline,

solvents or adhesives in the

same room or area near the

water heater.

Keep flammable products:

1. far away from heater,

2. in approved containers,

3. tightly closed and

4. out of children's reach.

Installation:

Do not install water heater

where flammable products will

be stored or used unless the

main burner flame is at least

18" above the floor. This will

reduce, but not eliminate, the

risk of vapors being ignited

by the main burner flame.

Read and follow water heater warnings and instructions. If

owners manual is missing, contact the retailer or manufacturer.

Water Heater Venting Safety

DANGER:

• Failure to install and properly vent the water

heater to the outdoors as outlined in the

“Venting” section of the Installation Instructions

in this manual will result in death from fire,

explosion, or asphyxiation from carbon

monoxide. NEVER operate this water heater

unless it is properly vented and has an adequate

air supply for proper operation.

• Be sure to inspect the vent terminal, the air intake, and

the coaxial vent system on the water heater for proper

installation at initial start-up and at least annually thereafter.

Refer to the “Care and Cleaning” section of this manual for

more information regarding coaxial vent system inspection.

WARNINGS:

• Gasoline and other flammable liquids, materials,

and vapors (including paint thinners, solvents,

and adhesives) are extremely dangerous.

DO NOT handle, use, or store gasoline or other

flammable or combustible materials anywhere

in the vicinity of a water heater or any other

appliance. Be sure to read and follow the labels

on the water heater, as well as the warnings

printed in this manual. Failure to do so can result

in death, bodily injury, or property damage.

• Combustible construction refers to adjacent

walls and ceilings and should not be confused

with combustible or flammable products and

materials. Combustible materials, such as

clothing, cleaning materials, or flammable

liquids, should never be stored in the vicinity of

this or any gas appliance. Fire or explosion can

occur causing death, personal injury, and/or

product damage. See page 16 for clearances to

combustible materials.

• Follow vent manufacturer’s instructions for

venting installation, including additional

clearances from combustibles, to avoid

conditions that can lead to death, personal

injury, and/or property damage.

• Use tankless water heater manufacturer-

approved Category III Stainless Steel vent

material only. No other vent material is

permitted.

• Moisture in the flue gas will condense as it

leaves the vent terminal. In cold weather this

condensate can freeze on the exterior wall,

under the eaves, and on surrounding objects.

Some discoloration to the exterior of the building

is to be expected. However, improper location or

installation can result in severe damage to the

structure or exterior finish of the building.

• For multiple-unit installation, a minimum

distance between vent terminations must be

maintained to prevent recirculation of vent gases.

Maintain a center-to-center distance between

vent terminations of 19 in. (48 cm) for two-unit

installation. Maintain a center-to-center distance

between vent terminations of 21 in. (53 cm) for

installation of three or more units.

CAUTIONS:

• Ensure that the appliance vent is securely

attached to the water heater collar.

• Condensate must drain away from the water

heater and should not be allowed to drain back

into any part of the vent system.

• DO NOT operate without the condensate trap

connected to the vent and routed to the proper

drain.

• Follow the vent manufacturer’s installation

instructions because the design might vary from

manufacturer to manufacturer.

IMPORTANT SAFETY INFORMATION

Safety

IMPORTANT SAFETY INFORMATION

DANGER

HOT

BURN

Water temperature over 125°F (52°C)

can cause severe burns instantly or

death from scalds.

Children, disabled and elderly are at

highest risk of being scalded.

See instruction manual before

setting temperature at water heater.

Feel water before bathing or

showering.

Temperature limiting valves are

available, see manual.

CAUTIONS:

• This water heater must only be

used with the following water

supply system conditions:

– With clean, potable water

free of corrosive chemicals,

sand, dirt, or other

contaminants.

– With inlet water

temperatures above 32°F

(0°C), but not exceeding

120°F (49°C).

– DO NOT reverse the hot and

cold water connections. The

water heater will not operate.

• Even when drained properly,

a small amount of water will

remain in the water heater.

In cold weather conditions,

this water can freeze. If this

happens, allow the defrost

protection on the heater at least

30 minutes to melt the frozen

water or the water heater may

not work properly.

Time/Temperature Relationship in Scalds

120°F (49°C) More than 5 minutes

125°F (52°C) 1 1/2 to 2 minutes

130°F (54°C) About 30 seconds

135°F (57°C) About 10 seconds

140°F (60°C) Less than 5 seconds

145°F (63°C) Less than 3 seconds

150°F (66°C) About 1 1/2 seconds

155°F (68°C) About 1 second

Table courtesy of Shriners Burn Institute

Water Time to Produce

Temperature a Serious Burn

Water Supply Safety

DANGERS:

• WATER TEMPERATURE

SETTINGS – Safety and energy

conservation are factors to be

considered when selecting the

water temperature setting of a

water heater’s remote control.

Water temperatures above

125°F (52°C) can cause death

or severe burns from scalding.

Be sure to read and follow

the warnings outlined on the

pictured label.

• There is a hot water scald

potential if the water

temperature is set too high.

Households with small children,

the disabled, or elderly persons

may require a 120°F (49°C) or

lower temperature setting to

prevent contact with “HOT”

water.

• Before manually operating the

relief valve, make certain no one

will be exposed to the danger

of the hot water released by

the valve. The water may be

hot enough to create a scald

hazard. The water should be

released into a suitable drain

to prevent injury or property

damage.

• Failure to perform the

recommended Routine Preventive Maintenance

can harm the proper operation of this water

heater, which can cause carbon monoxide

dangers, excessive hot water temperatures, and

other potentially hazardous conditions.

WARNINGS:

• IMPORTANT: DO NOT apply heat to the HOT or

COLD water connections. If sweat connections

are used, sweat tubing to adapter before fitting

adapter to the water connections on heater.

Any heat applied to the water supply fittings will

permanently damage the internal components of

the water heater.

• In case the pipe insulation is not rated for the

appropriate weather conditions, install electric

heat tracing or equivalent to prevent freezing of

the pipes. DO NOT insulate or block the drain

valve on the hot outlet fitting. If the pipes are

allowed to freeze, the water heater and the pipes

may malfunction or leak due to freezing water.

• Failure to drain the water heater as described

on Draining the Water Heater can cause serious

personal injuries from scalding and/or damage

the water heater.

Temperature Conversion Chart °F/°C

100 102 104 106 108 110 112 °F

38 39 40 41 42 43 44 °C

114 116 118 120 125 130 140 °F

46 47 48 49 52 54 60 °C

WARNINGS:

• The installation of gas piping must conform to

local utility company requirements and/or in the

absence of local codes, use the latest edition of

National Fuel Gas Code (NFGC), ANSI Z223.1/

NFPA 54, or CAN/CSA B149.1, Natural Gas and

Propane Installation Code.

• If inlet gas pressure is out of allowable range

[4.0” w.c. (1.0kPa) – 10.5” w.c. (2.6kPa)] for

Natural Gas, or [8.0” w.c. (2.0kPa) – 13.0” w.c.

(3.2kPa)] for LP gas, a gas pressure regulator

must be installed to maintain the allowable inlet

gas pressure.

• Should overheating occur or the gas supply fail

to shut off, turn off the manual gas control valve

to the water heater.

CAUTIONS:

• DO NOT attempt repair of electrical wiring, gas

piping, remote control, burners, vent connectors,

or other safety devices. Refer repairs to qualified

service personnel.

• Turn off the manual gas shut-off valve if the water

heater has been subjected to overheating, fire,

flood, physical damage, or if the gas supply fails

to shut off.

• DO NOT turn on the water heater unless the

water and gas supplies are completely opened.

NOTICE:

• The factory setting allows operating

temperatures between 100°F (38°C) and 120°F

(49°C). Only qualified service personnel should

perform this adjustment. Only factory-authorized

remote control(s) should be used.

Natural Gas and Liqueﬁed Petroleum Safety

DANGERS:

• Never attempt to convert the water heater from

one gas type to another. The water heater should

only use the fuel type in accordance with listing

on data plate—natural gas for natural gas units

and LP for LP units. Any other fuel usage will

result in death or serious personal injury from

fire and/or explosion. This water heater is not

certified for any other fuel type.

• Both natural gas and propane (LP) have an

odorant added to aid in detecting a gas leak.

Some people may not physically be able to smell

or recognize this odorant. If you are unsure or

unfamiliar with the smell of natural gas or LP,

ask the gas supplier. Other conditions, such

as “odorant fade,” which causes the odorant

to diminish in intensity, can also hide or

camouflage a gas leak.

• Water heaters using LP gas are different from

natural gas models. A natural gas water heater

will not function safely on LP and vice versa.

• LP water heaters should not be installed below

grade (for example, in a basement) if such

installation is prohibited by federal, state, and/or

local laws, rules, regulations, or customs.

• LP must be used with great caution. It is heavier

than air and will collect first in lower areas,

making it hard to detect at nose level.

• Before attempting to light the water heater,

make sure to look and smell for gas leaks. Use

a soapy solution to check all gas fittings and

connections. Bubbling at a connection indicates

a leak that must be corrected. When smelling to

detect a gas leak, be sure to also sniff near the

floor.

• Gas detectors are recommended in LP and

natural gas applications and their installation

should be in accordance with the detector

manufacturer’s recommendations and/or local

laws, rules, regulations, or customs.

• Combustible materials, such as clothing,

cleaning materials, or flammable liquids, must

not be placed in the vicinity of the water heater.

• If a gas leak is present or suspected:

– DO NOT attempt to find the cause yourself.

– Never use an open flame to test for gas

leaks. The gas can ignite resulting in death,

personal injury, or property damage.

– Follow the steps listed under “What to Do If

You Smell Gas” found on the front cover of

this manual.

Safety

IMPORTANT SAFETY INFORMATION

Before operating this water heater, be sure to read

and follow the instructions on the label pictured below

and all other labels on the water heater, as well as the

warnings printed in this manual. Failure to do so can

result in unsafe operation of the water heater, resulting

in death, personal injury, or property damage. Should

you have any problems reading or following the

instructions in this manual, STOP and get help from a

qualified service technician.

WARNING

: If you do not follow these instructions exactly, a fire or explosion may result

causing property damage, personal injury or loss of life.

FOR YOUR SAFETY READ BEFORE OPERATING

1.STOP! Read the safety information above on this label.

2.Turn off all electric power to the appliance.

3.Do not attempt to light the burner by hand.

4.Turn the Gas Shutoff Valve located on the outside of the unit

clockwise to the "OFF" position.

5.Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Follow "B" in

the safety information above on this label. If you don't smell gas, go to the next step.

6.Turn the Gas Shutoff Valve located on the outside of the unit counterclockwise to

the "ON" position.

7.Turn on all electric power to the appliance.

8.If the appliance will not operate, follow the instructions "To Turn Off Gas To Appliance"

and call your service technician or gas supplier.

TO TURN OFF GAS TO APPLIANCE

Turn off all electric power to the appliance if service is to be performed.

Turn

the

Gas

Shutoff

Valve

located

the

outside

the

unit

clockwise to

the

"OFF"

position.

GAS SHUTOFF

VALVE

OPEN CLOSE

OPERATING INSTRUCTIONS

Safety

Electrical Safety

DANGER:

• Shock Hazard – Make sure the electrical power

to the water heater is off to avoid electric shock

that will result in death or serious personal

injury.

WARNINGS:

• For your safety, the information in this manual

must be followed to minimize the risk of fire,

explosion, or electric shock that can result in

death, personal injury, and/or property damage.

• Field wiring connections and electrical

grounding must comply with local codes or,

in the absence of local codes, with the latest

edition of the National Electrical Code, ANSI/

NFPA 70, or in Canada, Canadian Electrical

Code, CAN/CSA C22.1, Part 1.

CAUTIONS:

• Label all wires prior to disconnecting for service.

Wiring errors can cause dangerous and improper

operation. Verify correct operation after

servicing.

• For your safety, burner inspection and cleaning

should be performed only by qualified service

personnel.

• Make certain the power to the water heater

is OFF before removing the unit cover panel.

Exposed electrical components and moving

parts can cause personal injuries.

• For your safety, DO NOT attempt repair of

electrical wiring, gas piping, remote control,

burners, vent connectors, or other safety

devices. Refer repairs to qualified service

personnel.

California law requires that water heaters must be

braced, anchored, or strapped to resist falling or

horizontal displacement due to earthquake motions.

For water heaters up to 52-gallon capacity, a brochure

with generic earthquake bracing instructions can be

obtained from: Office of the State Architect, 1102 Q

Street, Suite 5100, Sacramento, CA 95814, or you

may call 916-445-8100 or ask a water heater dealer.

However, applicable local codes shall govern

installation. For residential water heaters of a capacity

greater than 52 gallons or tankless-style, consult the

local building jurisdiction code for acceptable bracing

procedures.

FOR INSTALLATIONS IN THE STATE OF CALIFORNIA

Safety

IMPORTANT SAFETY INFORMATION

General Installation and Maintenance Safety

WARNINGS:

• This water heater must be installed in

accordance with these instructions, local

codes, utility company requirements and/or

in the absence of local codes, use the latest

edition of the American National Standard/

National Fuel Gas Code (NFGC), ANSI Z223.1

and National Fire Protection Association,

NFPA 54, or in Canada, CAN/CSA B149.1,

Natural Gas and Propane Installation Code,

and the latest edition of the National Electrical

Code, ANSI/NFPA 70, or in Canada, Canadian

Electrical Code, CAN/CSA C22.1, Part 1.

• If local codes require the application of

external insulation blanket kits, carefully follow

the manufacturer’s installation instructions

included with the kit. Only use blanket kits that

are approved for use with your water heater.

• For your safety, DO NOT attempt to

disassemble this water heater for any reason.

Improper adjustments, alterations, service, or

maintenance can cause death, personal injury,

or property damage.

SAVE THESE

INSTRUCTIONS

SAFETY PRECAUTIONS:

• Read this manual entirely before installing and/

or operating the water heater.

• Use this water heater only for its intended

purpose as described in this Use and Care

Manual.

• Have the installer show you the location of

the gas shut-off valve and how to shut it off if

necessary. Turn off the manual shut-off valve

if the water heater has been subjected to

overheating, fire, flood, physical damage, or if

the gas supply fails to shut off.

• Be sure your water heater is properly installed in

accordance with local codes and the provided

installation instructions.

• DO NOT attempt to repair or replace any part

of your water heater unless it is specifically

recommended in this manual. All other servicing

should be referred to a qualified service

technician.

PRODUCT INFORMATION

Read This Manual

Inside you will find many helpful hints on how to use and

maintain your water heater properly� A little preventive care on

your part can save you time and money over the life of your

water heater�

You’ll find many answers to common problems in the

Troubleshooting Chart in this Use and Care Manual� Always refer

to this chart before calling for service� Referring to this chart

before calling may answer your question(s) and eliminate the

need for service�

Preoperating Checklist

Is the main gas valve to the water heater turned on?

Is the fuse in place or is the breaker turned on?

Does the water heater’s electronic ignition light?

Is the water temperature set to a safe temperature?

Is the water heater connected to a floor drain?

Is the water heater properly vented to the outside?

Is the water heater installed in a safe location away

from flammable materials and/or freezing conditions?

SafetyProduct Information

For Your Records

Write down and save the following product

information along with the original sales slip and/or

cancelled check.The model and serial numbers can

be found on the top label on the right side of the

water heater.

MODEL NUMBER:

SERIAL NUMBER:

DATE OF INSTALLATION:

INSTALLING COMPANY/PHONE NUMBER:

PLUMBING CONTRACTOR/PHONE NUMBER:

See page 77 for additional service information.

PRODUCT INFORMATION

Product Information

Speciﬁcations – Direct-Vent Models

Speciﬁcations – Outdoor Models

27.48 in.

(698 mm)

24.17 in.

(614 mm)

3.75 in.

(95.2 mm)

6.8 in.

(173 mm)

1.63 in. (41.5 mm)

5.07 in.

(129 mm)

3.53 in.

(90 mm)

2.8 in.

(71 mm)

9.84 in.

(250 mm)

1.52 in. (38.7 mm)

5.24 in. (133 mm)

13.66 in.

(347 mm)

20.7 in.

(526 mm)

13.5 in.

(343 mm)

3.93 in.

(100 mm)

1.55 in.

(39.5 mm)

5.28 in.

(134.3 mm)

1.61 in.

(41 mm)

9 in.

(229 mm)

2.48 in.

(63 mm)

1.65 in.

(42 mm)

Speciﬁcations

PRODUCT INFORMATION

Product Information

Rating Label

Indoor Outdoor

The following product information can be found from the

rating label on this water heater:

A Model Number

B Serial Number

C Data Bar Code

D Heater Type

E Installation Type

F Type of Gas

G Max Inlet Gas Pressure

H Min Inlet Gas Pressure

J Recovery Rating

K Max BTU Input Rating

L Min BTU Input Rating

M Manifold Gas Pressure

N Certification Stamp

P Alternate Approval Stamp

Q Clearances

Product Information

The graphic below illustrates the pressure drop across the water heater. Please ensure ample water supply pressure

is available to ensure the best performance.

PRODUCT INFORMATION

70 80 90 100 110

Water Heater Flow Rate Curves

0 10 20 30 40 50 60

Water Flow Rate (GPM)

Delta T - Temperature Rise (°F)

Water Heater Flow Rate Curves

RTG-95DVL-3

RTG-84DVL-3

RTG-70DVL-3

0 1 2

Pressure Drop (PSI)

3 4 5 6 7 8 9

Pressure Drop (� of head)

Water Flow Rate (GPM)

Pressure Drop Curve

PRODUCT INFORMATION

General Descriptions

Typical Direct-Vent Water Heater

(Venting Required)

Product Information

Water Filter

Built-In

Display

Manual Gas

Shut-Off Valve

Union

Power

Supply

Cord

Sediment Trap

Service Valve

Suitable

Drain

Valve

To Hot Water

Faucet(s)

Relief

Valve

Cold Water Supply

Shut-Off Valve

Cap

Manual Gas

Supply Line

Shut-Off Valve

To Drain: Dispose of

condensate in accordance

with local codes.

Condensate

Collector

PRODUCT INFORMATION

Typical Outdoor Water Heater

(No Venting Required)

This water heater is for OUTDOOR installation only.

DANGER:

DO NOT install this water heater indoors or in a confined area. It is designed for outdoor installation

only. Any other type of installation will result in death or serious personal injury.

Product Information

Relief

Valve

Water Filter

Air Inlet

Flue Terminal

Manual Gas

Shut-Off Valve

Union

Power

Supply

Cord

Sediment Trap

Service Valve

Suitable

Drain

Valve

To Hot Water

Faucet(s)

Relief

Valve

Cold Water Supply

Shut-Off Valve

Cap

Manual Gas

Supply Line

Shut-Off Valve

WiFi Control

& Harness

(included on

some models)

Remote Control

With Power Switch

(Installed Indoor)

INSTALLATION

INSTRUCTIONS

FOR THE CONTRACTOR

INSTALLATION INSTRUCTIONS

Coaxial Vent Pipe

and Air Intake

0" min.

(0 mm)

0" min.

(0 mm)

0" min.

(0 mm)

This water heater must be installed in accordance

with these instructions, local codes, and utility

company requirements.

In the United States where local codes are not

available, use the latest edition of the American

National Standard/National Fuel Gas Code. A

copy of the Fuel Gas Code can be purchased

from either the American Gas Association, 400

North Capitol Street Northwest, Washington, DC

20001, as ANSI standard Z223.1, or National Fire

Protection Association, 1 Batterymarch Park, MA

02269 as NFPA 54.

In Canada, use the latest edition of the CAN/

CSA B149.1 Natural Gas and Propane Installation

Code and the Canadian Electrical Code, CAN/CSA

C22.1, Part 1.

Choosing a Location

WARNING:

Fire Hazard – Combustible construction refers

to adjacent walls and ceilings and should not be

confused with combustible or flammable products

and materials. Combustible materials, such as

clothing, cleaning materials, or flammable liquids,

must not be placed against or next to the water

heater. Fire or explosion could occur causing death,

personal injury, and/or product damage.

A gas-fired water heater should never be installed

in a space or room where liquids with flammable

vapors are used or stored. Such liquids include

gasoline, LP gas (butane or propane), paint,

adhesives and their thinners, solvents, or removers.

Flammable vapors carry long distances from where

they are used or stored. The open flame of the

water heater’s main burner can ignite these vapors

causing an explosion or fire.

NOTICE:

Elevating a gas-fired water heater will reduce but

NOT eliminate the possibility of lighting the vapor of

flammable liquids which may be improperly stored

or accidentally spilled.

NOTICE:

DO NOT connect power until venting installation is

complete. See "Venting."

NOTICE:

This water heater should not be located in an

area where leakage of the heat exchanger or

connections will result in damage to the area

adjacent to it or to lower floors of the structures.

When such areas cannot be avoided, install a

suitable catch pan with an adequate drain under

the water heater. This drain pan must not restrict

the combustion airflow.

The following requirements will ensure a safe

installation:

The water heater must be located in an area where

it won’t sustain damage from moving vehicles,

flooding, etc. If the water heater is installed in a

storage garage, the direct ignition system and

main burner should be no less than 18 in. (45 cm)

above the garage floor.

If the water heater is installed in a repair garage or

in a private garage, the direct ignition system and

main burner should be no less than 4.5 ft. (1400

mm) above the garage floor.

The water heater should be installed as close as

possible to the vent termination. This minimizes

the vent length and the number of elbows and

joints required for venting.

The water heater should be installed with the

proper venting and exhaust materials suitable for

Category III venting.

Standards Compliance

General

INSTALLATION INSTRUCTIONS

Every vent pipe penetration of a floor or ceiling

that is not in a fire-rated shaft requires a fire stop

plate.

Failure to install and properly vent the water heater

to the outdoors as outlined on "Venting" can result

in unsafe operation.

Long hot water lines should be insulated to

conserve water and energy.

The water heater and water lines should be

protected from exposure to freezing temperatures.

General

• DO NOT install the water heater in

areas prohibited by National Fuel Gas

Code in U�S� installation or CAN/CSA

B149�1 in Canada installation�

• DO NOT install the water heater where

it is subject to vibrations�

• DO NOT install the water heater in

a recreational vehicle, boat, or other

watercraft�

• DO NOT install the water heater

near vents for heating and cooling�

If necessary, maintain a minimum

clearance of 4 ft� (1�2 m)�

Minimum water heater clearances from

combustible and noncombustible construction are

as follows:

– 1/2 in. (1.3 cm) for sides and front

– 0 in. (0 cm) for rear with support bracket(s)

– 12 in. (30 cm) from the bottom and top

NOTICE:

Preferred maintenance clearance is 24 in. (61 cm)

from top, bottom, and front of unit.

Minimum clearance around the coaxial vent pipe should

meet the specifications listed on the instruction/warning

label on the water heater� If no label is found, use

the vent manufacturer’s specifications or a minimum

clearance of 0 in� (0 cm) around the vent pipe�

0" min.

(0 mm)

Choosing a Location

Fire Stop Plate

(as required)

12" min.

(300 mm)

0" min.

(0 mm)

1/2" min.

(13 mm)

1/2" min.

(13 mm)

12" min.

(300 mm)

INSTALLATION INSTRUCTIONS

Visually inspect the water heater for any possible

damage.

Check the rating plate on the water heater to make

sure the water heater was designed to be used

with the supplied type of gas (natural or LP).

Verify that all included supplied parts are present

as shown.

General

Product Inspection

Water Heater Installation

Corrosive Atmosphere

NOTICE:

The water heater should not be installed near an air

supply containing halogenated hydrocarbons.

Avoid installing a water heater in any of the following

locations: beauty shops, dry-cleaning establishments,

photo processing labs, and storage areas for liquid and

powdered bleaches or swimming pool chemicals� These

locations often contain such halogenated hydrocarbons�

The air supply containing halogenated hydrocarbons is

safe to breathe, but when passed through a gas flame,

corrosive elements are released that will shorten the life

of any gas-burning appliance�

Propellants from common spray cans or gas leaks from

A/C and refrigeration equipment are highly corrosive after

passing through a flame�

NOTICE:

The water heater warranty is void when the failure

is due to operation in corrosive conditions.

Remote Control Cable

WiFi Display / Wall Mount

(outdoor models only)

Screws

Washers

Pressure Relief Valve

(Some models only)

Mounting Stays

General

INSTALLATION INSTRUCTIONS

NOTICE:

The National Fuel Gas Code (NFGC) and CAN/CSA B149.1 mandate a manual gas

shut-off valve. See NFGC/B149.1 for complete instructions. Local codes or plumbing authority

requirements may vary from the instructions or diagrams provided and take precedence over

these instructions.

Typical Installation of Direct-Vent Water Heater (Venting Required)

Water Heater Installation

1/4" Per Foot Downward

Slope (recommended)

Wall Plate

90° Elbow

Vent Termination

With Protective

Screen

Built In Condensate Collector

Condensate

Trap

Manual Gas Supply

Line Shut-Off Valve

Union

Sediment Trap

Cap

Cold Water Supply

Shut-Off Valve

Manual Gas

Shut-Off Valve

Water

Filter

Power

Supply

Cord

To Hot Water

Faucet(s)

Union

Service

Valve

Relief

Valve

Drain

Valve

6"(150 mm)

Air Gap

Discharge Line (To Suitable Drain)

Outside Wall

To Drain: Dispose of condensate in

accordance to local codes.

INSTALLATION INSTRUCTIONS

Water Heater Installation

Typical Installation of Outdoor Water

Heater (No Venting Required)

This water heater is for OUTDOOR installation only.

WARNING:

DO NOT install this water heater indoors or in a

confined area. It is designed for outdoor installation

only. Any other type of installation can result in

death, personal injury, and/or damage to the product

or property.

Alternate Water Piping Arrangement

With Preferred Valve Kit

A valve kit is available and can be used with all models�

See “Water Supply Connections” on page 35 for

installation instructions�

General

Relief

Valve

Water Filter

Air Inlet

Flue Terminal

Manual Gas

Shut-Off Valve

(Supplied)

Union

Sediment Trap

Service Valve

Discharge Line (To

Suitable Drain)

6" (150 mm)

Air Gap

Drain

Valve

To Hot Water

Faucet(s)

Relief

Valve

Hard-

Wire

Cold Water Supply

Shut-Off Valve

Cap

Manual Gas

Supply Line

Shut-Off Valve

Cold Water

Service Valve

Hot Water

Service Valve

Relief Valve

Water Outlet

Drain

Water

Inlet

Mounting the Water Heater

CAUTION

Reinforcement of the wall is required in case the

wall is not strong enough to hold the water heater.

Failure to do so could result in personal injury and/

or product or property damage.

The mounting location for the water heater should allow

for easy access and operation�

The water heater is designed to be installed either inside

the wall cavity, between the wall studs, or outside the wall

cavity� Either installation requires the water heater to be

supported with a wooden support brace between the wall

studs or a piece of wood that is equal in size to the water

heater and securely attached to the wall studs before the

water heater is attached to it� This piece of wood can be

installed inside or outside the wall� Use wood screws to

secure brackets to the wall� If mounting to a concrete

wall, use lag bolts designed for concrete�

Make sure the proper electrical outlet or supply (120

VAC/60 Hz) is available and located near the unit� Direct-

vent models come with a 6-ft� (1�8-m) power cord, while

the outdoor models require hard-wiring or the addition of

a plug�

Position the upper mounting bracket and partially install

the center mounting screw� The clearance between the

screw head and the wall should be about 1/8 in� (0�3 cm)�

Hang the upper bracket on the screw�

NOTICE:

The image above may differ in appearance from

your water heater.

Using two mounting screws and washers, secure the

lower mounting bracket to the wall� Then, secure the

upper mounting bracket to the wall with two mounting

screws and washers�

Position the water heater and tighten the adjustment

screws to complete the installation� The rear of the water

heater can be positioned anywhere between 3/8 in� (0�95

cm) and 1 1/2 in� (3�8 cm) from the wall (indoor model

only)�

"If additional clearance is needed to the back wall in order

to to attach venting, utilize the mounting stays included

with the heater� Attach the stays to the heater mounting

brackets using the included screws, then follow the above

steps to attach the heater to the wall� The mounting

stays add 1 3/16in� (3cm) of clearance�

INSTALLATION INSTRUCTIONS

General

3/8"- 1 1/2" min.

(9.5 - 30mm)

Venting for Direct-Vent Water Heater

INSTALLATION INSTRUCTIONS

The water heater must be installed with 3-in�/5-in�

(7�6-cm/12�7-cm) diameter UL-approved Category III

Coaxial Stainless Steel appliance vent pipe or water

heater manufacturer-approved concentric vent pipe�

DANGER:

Failure to install and properly vent the water heater

to the outdoors as outlined in this Venting section

will result in death or serious personal injury. To

avoid the risk of fire, explosion, or asphyxiation

from carbon monoxide, NEVER operate the water

heater unless it is properly vented and has

adequate air supply for proper operation as outlined

in this Venting section.

WARNINGS:

• Use 3-in./5-in. (7.6-cm/12.7-cm) UL-approved

Category III Stainless Steel vent materials or

water heater manufacturer-approved vent

material. No other vent material is permitted for

use with this appliance.

• Refer to page 16 for required clearances to

combustible materials. Improper clearances

can cause explosion or fire resulting in death,

personal injury, and/or product damage.

Venting Requirements

The installation of venting must comply with national

codes, local codes, and the vent manufacturer’s

instructions�

The water heater must be vented to the outdoors as

described in these instructions� DO NOT vent this water

heater through a chimney� It must be vented separately

from all other appliances�

This water heater requires a special venting system�

Refer to venting supplier’s instruction for complete parts

list and method of installation� The manufacturers and

product lines listed on the following tables have been

tested and authorized to safely operate with Rheem

tankless water heater� Supplier of stainless steel venting

that are not listed on the following table is not permitted

for use Category III products with Rheem tankless water

heater�

WARNING:

DO NOT mix venting suppliers and models in

venting systems. Failure to comply could result in

personal injury, property damage, or death

Installations must comply with applicable national, state,

and local codes�

CAUTION:

DO NOT attempt to fabricate or adapt other vent

pipe or materials to this venting.

Use the provided screws to connect the coaxial vent pipe

together�

Follow the vent manufacturer’s installation instructions�

This water heater can be vented horizontally or vertically�

All coaxial vent piping runs must be adequately

supported� The maximum recommended unsupported

span should be no more than 4 ft� (1�2 m)� Only use

support isolation hanging bands� DO NOT use wire to

support pipe runs�

Preexisting Venting Notes:

If the water heater is being installed as a

replacement for an existing water heater, a

thorough inspection of the existing venting and

air intake system must be performed prior to any

installation work. Verify that the correct materials,

vent lengths, and terminal locations as described

in this manual have been met. Carefully inspect

the entire venting and air intake system for any

signs of cracks or fractures, particularly at the

joints between elbows or other fittings and the

straight runs of vent pipe. Check the system for

signs of sagging or other stresses in the joints as

a result of misalignment of any components in the

system. If any of these conditions are found, they

must be corrected in accordance with the venting

instructions in this manual before completing

the installation and putting the water heater into

service.

See page 26 for additional requirements for the

Commonwealth of Massachusetts�

Venting

Allowable Stainless Steel Vent Supplier and Part Numbers

*: xx refer to length of pipe

Example of Components

Metal Fab

Pipe *3CGVxx, 3CGxx

90 Degree Elbow 3CGV90L, 3CG90L

45 Degree Elbow 3CGV45L, 3CG45L

Adjustable Vent Length 3GVL22, 3CGVVAL20

Vertical Cap Termination 3CGVPVT, 3CGPVT

Appliance Adapter 3CGVVPA, 3CGVPA

Condensate Drain 3CGVVDS, 3CGVDS

Horizontal Termination

3CGVPHT, 3CGPHT,

3CGVPHT3, 3CGVPHT4

Vent Lengths

Before starting the vent installation, careful

planning should be given to the routing and

termination of the vent pipes. The length of the

vent pipes (inlet and outlet) should be kept to

a minimum. Also, see pages 27,28, and 29 for

vent terminal placement. Refer to the maximum

and minimum vent length charts for the pipe

sizes that can be used and the total equivalent

length of pipe that can be used. DO NOT exceed

equivalent length of pipe in maximum vent length

chart.

DO NOT USE Schedule 20, Cell Core, Drain Pipe,

Galvanized, Aluminum or B-Vent.

Venting for Direct-Vent Water Heater

The vent termination is not included in the equivalency calculations.

NOTICE: A 90 degree standard bend concentric elbow is equivalent to 1 ft, 6 in. A 45 degree standard

bend concentric elbow is equivalent to 9 in.

SINGLE UNIT: MAX. EQUIVALENT VENT

LENGTHS - STRAIGHT PIPE

Number of

90° ELbows

Max Length 3"/5" Straight Pipe

0 43 ft. (13.1 m)

1 41.5 ft. (12.6 m)

2 38.5 ft. (12.2 m)

3 34 ft. (11.7 m)

4 28 ft. (11.3 m)

5 20.5 ft. (10.8 m)

6 11.5 ft. (10.4 m)

EQUIVALENT FT. OF ELBOWS

3" / 5"

90° 1.6 ft.

45° 9 in.

INSTALLATION INSTRUCTIONS

Venting

Venting for Direct-Vent Water Heater

Venting

When the water heater is installed above 2000 ft.

(610 m), the settings on the DIP switch located

on the control board need to be changed per

vent length and altitude. If these settings are

not changed, the water heater may not function

properly.

Verify the altitude that the water heater is installed.

Turn off the gas and water to the water heater by

closing the shut-off valves.

Remove the front cover panel on the water heater.

Find DIP Switch 2 located in the top-right portion

of the control board. The switch labeled “DIP 2” is

the bottom switch.

The factory settings for this switch should all be in

the OFF position (DOWN).

NOTICE:

DO NOT alter any other DIP switch settings. The

manifold pressure will be reduced accordingly.

For altitudes above 2000 ft. (610 m), refer to the table

below for the necessary DIP switch settings. These

setting must be changed to ensure proper operation.

Replace the front cover panel.

Turn on the gas and water to the water heater by

opening the shut-off valves.

WARNING:

This water heater requires the correct DIP switch

adjustments per vent length and altitude for proper

operation. Incorrect DIP switch adjustments may cause

improper water heater operation resulting in serious injury

or death.

DIP Switch

Control Board

1 2 3 4

"MAX"

button

"ADJUST"

button

"MIN"

button

DIP Switch 1

INSTALLATION INSTRUCTIONS

SECTION HIGH-ALTITUDE

Sea Level (A Setting) 0-2000 ft (0 m - 610 m)

B Setting 2001 ft - 5400 ft (610 m - 1650 m)

C Setting 5401 ft - 7800 ft (1650 m - 2377 m)

DIP Switch 2

ALL VENT LENGTHS

Identify

Vent Length

IDENTIFY ALTITUDE

0 - 2,000 ft 2,001 - 5,400 ft 5,400 - 7,800 ft

Setting Dip Setting Dip Setting Dip

All Vent

Lengths

(Factory

Setting)

B C

1 2 3 4

High-Altitude DIP Switch Adjustments

NOTICE:

It is recommend to have a vent length as short as

possible. Input rate at high altitude naturally is derated.

In addition to that, input rate of the water heater

decreases more if there is restriction (pressure drop) in

the venting system. Refer to input rate reduction table

due to vent length on page 24. Actual input rate reduction

may be different at each installation.

NOTICE:

Make sure that the seam of the inner vent pipe in a

horizontal run is towards the top of the installation

as shown above.

Venting Through Closed Spaces

If the coaxial vent piping passes through a closed

space, a minimum clearance of 0 in. (0 cm) for

vertical piping and for horizontal piping should

be maintained between the coaxial vent pipe and

combustibles and non combustibles. Be sure

to follow local codes and vent manufacturer’s

installation instructions.

For maintenance and inspection purposes, the

following access panels may be required.

Two (2) inspection access panels large enough to

allow access for venting inspection. One access

panel may be close to where the coaxial vent pipe

enters the ceiling. The other access panel may be

near the vent termination.

It is recommend to have a vent length as short as

possible. Input rate of the water heater decreases

if there ir restriction (pressure drop) in the venting

system.

The following table shows approximate input rate

reduction. Actual input rate reduction may be

different at each installation.

This table will only apply to the indoor models.

INSTALLATION INSTRUCTIONS

Venting for Direct-Vent Water Heater

Vent Pipe Wall Plate

Inspection

Access Panel

(Optional)

Inspection

Access Panel

(Optional)

CeilingFire

Stop

90˚

Elbow

1/4" Per Foot Downward Slope

(recommended)

Vent Seam

Venting

Setting Min Vent Length Max Vent Length

A-1 0% 10%

INSTALLATION INSTRUCTIONS

Venting

Appliance Vent Adapter

CAUTION:

Ensure that the appliance vent adapter is securely

attached to the water heater collar. Improperly

connected vent adapter can cause damage to the

appliance and/or poor performance.

Metal Fab Inc�, Rainbow, and Ubbink standard concentric

vent pipe can be installed into the water heater collar

without an appliance vent adapter�

NOTICE:

To install the appliance vent adapter, please

follow the appliance vent adapter manufacturer's

instructions.

Draining Vent Condensate

WARNINGS:

Failure to provide a vent condensate drain close

to the water heater could allow acidic flue gas

condensate to enter into water heater flueways,

causing premature failure of the water heater.

If the condensate collector is not used, the drain fitting

must be capped to prevent exhaust gases and condensate

from entering the building� The cap is supplied on the

water heater�

CAUTIONS:

Condensate is known to be acidic; refer to federal,

state (provincial), and local codes for proper

handling and discharge methods.

Condensate must be drained away from the water

heater and should not be allowed to drain back

into any part of the vent system.

The condensate collector must be used with

vertical vent installation.

Condensate collector must be used with horizontal

vent installation if the vent has an UPWARD slope

toward the termination.

Provision should be made to collect and dispose

of condensate from the venting systems.

When a water heater is vented horizontally, the

vent pipe should have a DOWNWARD or UPWARD

slope towards the termination. If an UPWARD

slope is used, always attach a drain hose to the

condensate collector and plumb the hose to a

sanitary sewer drain.

When a water heater is vented vertically, an

UPWARD slope must always be used. Always

attach a drain hose to the condensate collector

and plumb the hose to a sanitary sewer drain.

Properly installed condensate traps prevent the

condensate from draining back into the water

heater.

A high-temperature silicone tubing suitable for use

with acidic condensate and appropriate for the

temperature range should be used.

The drain tube is fashioned into a “pigtail” trap

and must be filled with water to prevent flue gases

from emitting into the building prior to operating

the water heater.

Downward Slope

(recommended)

Upward Slope

Water

Filter

To Drain: Dispose of condensate

in accordance to local codes.

Union

Condensate Trap

Condensate Collector

Venting for Direct-Vent Water Heater

In the Commonwealth of Massachusetts

The Commonwealth of Massachusetts requires compliance with

regulation 248 CMR 4�00 and 5�00 for installation of through-

the-wall vented gas appliances as follows:

5�08: Modifications to NFPA–54, Chapter 10

(1) Revise NFPA–54 section 10�5�4�2 by adding a second

exception as follows:

Existing chimneys shall be permitted to have their use

continued when a gas conversion burner is installed, and shall

be equipped with a manual reset device that will automatically

shut off the gas to the burner in the event of a sustained back-

draft�

(2) Revise 10�8�3 by adding the following additional

requirements:

(a) For all side-wall, horizontally vented, gas-fueled equipment

installed in every dwelling, building, or structure used in

whole or part for residential purposes, including those owned

or operated by the Commonwealth and where the side-wall

exhaust vent termination is less than seven (7) feet above

finished grade in the area of the venting, including but not

limited to decks and porches, the following requirements shall

be satisfied�

1� INSTALLATION OF CARBON MONOXIDE DETECTORS� At

the time of installation of the side-wall, horizontally vented,

gas-fueled equipment, the installing plumber or gasfitter shall

observe that a hard-wired carbon monoxide detector with an

alarm and battery backup is installed on the floor level where

the gas equipment is to be installed� In addition, the installing

plumber or gasfitter shall observe that a battery-operated or

hard-wired carbon monoxide detector with an alarm is installed

on each additional level of the dwelling, building, or structure

served by the side-wall, horizontally vented, gas-fueled

equipment� It shall be the responsibility of the property owner

to secure the services of qualified licensed professionals for the

installation of hard-wired carbon monoxide detectors�

a� In the event that the side-wall, horizontally vented, gas-fueled

equipment is installed in a crawl space or an attic, the hard-

wired carbon monoxide detector with alarm and battery backup

may be installed on the next adjacent floor level�

b� In the event that the requirements of this subdivision cannot

be met at the time of completion of installation, the owner shall

have a period of thirty (30) days to comply with the above

requirements, provided, however, that during said thirty (30)

day period, a battery-operated carbon monoxide detector with

an alarm shall be installed�

2� APPROVED CARBON MONOXIDE DETECTORS� Each carbon

monoxide detector as required in accordance with the above

provisions shall comply with NFPA 720 and be ANSI/UL

2034-listed and IAS-certified�

3� SIGNAGE� A metal or plastic identification plate shall be

permanently mounted to the exterior of the building at a

minimum height of eight (8) feet above grade directly in line

with the exhaust vent terminal for the horizontally vented, gas-

fueled heating appliance or equipment� The sign shall read, in

print size no less than one-half (1/2) inch in size, “GAS VENT

DIRECTLY BELOW� KEEP CLEAR OF ALL OBSTRUCTIONS�”

4� INSPECTION� The state or local gas inspector of the side-

wall, horizontally vented, gas-fueled equipment shall not

approve the installation unless, upon inspection, the inspector

observes carbon monoxide detectors and signage installed

in accordance with the provisions of 248 CMR 5�08 (2)(a)(1

through 4)�

(b) EXEMPTIONS: The following equipment is exempt from 248

CMR 5�08 (2)(a)(1 through 4):

1� The equipment listed in Chapter 10 entitled “Equipment Not

Required To Be Vented” in the most current edition of NFPA 54

as adopted by the Board, and

2� Product-approved side-wall, horizontally vented, gas-fueled

equipment installed in a room or structure separate from the

dwelling, building, or structure used in whole or in part for

residential purposes�

VENTING SYSTEM PROVIDED� When the manufacturer of

product-approved side-wall, horizontally vented, gas-fueled

equipment provides a venting system design or venting system

components with the equipment, the instructions provided

by the manufacturer for installation of the equipment and the

venting system shall include:

1� Detailed instructions for the installation of the venting system

design or the venting system components; and

2� A complete parts list for the venting system design or venting

system�

(d) MANUFACTURER REQUIREMENTS – GAS EQUIPMENT

VENTING SYSTEM NOT PROVIDED� When the manufacturer

of product-approved side-wall, horizontally vented, gas-fueled

equipment does not provide the parts for venting the flue

gases, but identifies “special venting systems,” the following

requirements shall be satisfied by the manufacturer:

1� The referenced “special venting systems” instructions

shall be included with the appliance or equipment installation

instructions, and

2� The “special venting systems” shall be product-approved by

the Board, and the instructions for that system shall include a

parts list and detailed installation instructions�

(e) A copy of all installation instructions for all product-

approved side-wall, horizontally vented, gas-fueled equipment,

all venting instructions, all parts lists for venting instructions,

and/or all venting design instructions shall remain with the

appliance or equipment at the completion of the installation�

NOTE: For the State of Massachusetts, use only plastic

piping, fittings and vent terminations as specified in this

manual which are approved by the Massachusetts Board

of State Examiners of Plumbers and Gas for venting of

appliances (see hyperlink below):

https://licensing.reg.state.ma.us/pubLic/pl_products/

pb_pre_form.asp”

Venting

Venting for Direct-Vent Water Heater

INSTALLATION INSTRUCTIONS

Venting for Direct-Vent Water Heater

Venting

Horizontal Vent Terminal Location for Other than Direct Vent/Outdoor Heater

Regulator vent outlet in the event no

regulator is present, H and I can be

disregarded.

Fixed

closed

15 ft

Fixed

closed

Inside

corner detail

Operable

VENT TERMINAL

AIR SUPPLY INLET

AREA WHERE TERMINAL IS NOT PERMITTED

In accordance with the current

CSA B149.1 Natural Gas and Propane Installation Code

In accordance with the current

ANSI Z223.1/ NFPA 54 National Fuel Gas Code

‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the oor.

Canadian Installations

US Installations

A= Clearance above grade, veranda, porch, deck

or balcony.

12 inches (30 cm) 12 inches (30 cm)

B= Clearance to window or door that may be

opened.

• 6 in (15 cm) for appliances ≤ 10,000 Btuh

(3 kW),

• 12 in (30 cm) for appliances > 10,000 Btuh

(3 kW) and ≤ 100,000 Btuh (30 kW),

• 36 in (91 cm) for appliances > 100,000 Btuh

(30 kW)

4 ft (1.2) below or to side of opening; 1 ft

(300 mm) above opening.

C= Clearance to permanently closed window. 0 in (0 cm) 0 in (0 cm)

D= Vertical Clearance to ventilated soffit located

above the terminal within a horizontal

distance of 2 feet (61 cm) from the center

line of the terminal.

12 in (30 cm) 12 in (30 cm)

E= Clearance to unventilated soffit. 12 in (30 cm) 12 in (30 cm)

F= Clearance to outside corner. 24 in (61 cm) 24 in (61 cm)

G= Clearance to inside corner. 18 in (46 cm) 18 in (46 cm)

H = Clearance to each side of center line

extended meter/regulator assembly. above

3 feet (91 cm) within a height 15 feet (4.6 m) 3 ft (91 cm) within a height of 15 ft (4.6 m)

I = Clearance to service regulator vent outlet. 3 feet (91 cm) 3 feet (91 cm)

J = Clearance to nonmechanical air supply inlet

to building or the combustion air inlet to any

other appliance..

• 6 in (15 cm) for appliances ≤ 10,000 Btuh

(3 kW),

• 12 in (30 cm) for appliances > 10,000 Btuh

(3 kW) and ≤ 100,000 Btuh (30 kW),

• 36 in (91 cm) for appliances > 100,000 Btuh

(30 kW)

4 ft (1.2) below or to side of opening; 1 ft

(300 mm) above opening.

K = Clearance to mechanical air supply inlet.

6 feet (1.83 m)

3 feet (91 cm) above if within 10 feet (3 m)

horizontally.

L = Clearance above paved side walk or paved

driveway located on public property.

7 feet (2.13 m)

7 feet (2.13 m) for mechanical draft systems

(Category I appliances); vents for Category II

and IV appliances cannot be located above public

walkways or other areas where condensate or

vapor can cause a nuisance or hazard.

M = Clearance under veranda, porch, deck or

balcony.

12 in (30 cm) ‡ 12 in (30 cm) ‡

Venting for Direct-Vent Water Heater

Venting

Horizontal Vent Terminal Location for Direct-Vent Water Heater

Regulator vent outlet in the event no

regulator is present, H and I can be

disregarded.

Fixed

closed

15 ft

Fixed

closed

Inside

corner detail

Operable

VENT TERMINAL

AIR SUPPLY INLET

AREA WHERE TERMINAL IS NOT PERMITTED

Canadian Installations

US Installations

A= Clearance above grade, veranda, porch, deck

or balcony.

12 inches (30 cm) 12 inches (30 cm)

B= Clearance to window or door that may be

opened.

• 6 in (15 cm) for appliances ≤ 10,000 Btuh

(3 kW),

• 12 in (30 cm) for appliances > 10,000 Btuh

(3 kW) and ≤ 100,000 Btuh (30 kW),

• 36 in (91 cm) for appliances > 100,000 Btuh

(30 kW)

• 6 in (15 cm) for appliances ≤ 10,000 Btuh

(3 kW),

• 12 in (30 cm) for appliances > 10,000 Btuh

(3 kW) and ≤ 50,000 Btuh (15 kW),

• 12 in (30 cm) for appliances > 50,000 Btuh

(15 kW)

C= Clearance to permanently closed window. 0 in (0 cm) 0 in (0 cm)

D= Vertical Clearance to ventilated soffit located

above the terminal within a horizontal

distance of 2 feet (61 cm) from the center

line of the terminal.

12 in (30 cm) 12 in (30 cm)

E= Clearance to unventilated soffit. 12 in (30 cm) 12 in (30 cm)

F= Clearance to outside corner. 24 in (61 cm) 24 in (61 cm)

G= Clearance to inside corner. 18 in (46 cm) 18 in (46 cm)

H = Clearance to each side of center line

extended meter/regulator assembly. above

3 feet (91 cm) within a height 15 feet (4.6 m) 3 ft (91 cm) within a height of 15 ft (4.6 m)

I = Clearance to service regulator vent outlet. 3 feet (91 cm) 3 feet (91 cm)

J = Clearance to nonmechanical air supply inlet

to building or the combustion air inlet to any

other appliance..

• 6 in (15 cm) for appliances ≤ 10,000 Btuh

(3 kW),

• 12 in (30 cm) for appliances > 10,000 Btuh

(3 kW) and ≤ 100,000 Btuh (30 kW),

• 36 in (91 cm) for appliances > 100,000 Btuh

(30 kW)

• 6 in (15 cm) for appliances ≤ 10,000 Btuh

(3 kW),

• 12 in (30 cm) for appliances > 10,000 Btuh

(3 kW) and ≤ 50,000 Btuh (15 kW),

• 12 in (30 cm) for appliances > 50,000 Btuh

(15 kW)

K = Clearance to mechanical air supply inlet.

6 feet (1.83 m)

3 feet (91 cm) above if within 10 feet (3 m)

horizontally.

L = Clearance above paved side walk or paved

driveway located on public property.

7 feet (2.13 m)

7 feet (2.13 m) for mechanical draft systems

(Category I appliances); vents for Category II

and IV appliances cannot be located above public

walkways or other areas where condensate or

vapor can cause a nuisance or hazard.

M = Clearance under veranda, porch, deck or

balcony.

12 in (30 cm) ‡ 12 in (30 cm) ‡

In accordance with the current

CSA B149.1 Natural Gas and Propane Installation Code

In accordance with the current

ANSI Z223.1/ NFPA 54 National Fuel Gas Code

‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the oor.

INSTALLATION INSTRUCTIONS

Venting for Direct-Vent Water Heater (cont.)

Horizontal Vent Considerations

WARNING:

Moisture in the flue gas will condense as it leaves

the vent terminal. In cold weather this condensate

can freeze on the exterior wall, under the eaves,

and on surrounding objects. Some discoloration

to the exterior of the building is to be expected.

However, improper location or installation can

result in severe damage to the structure or exterior

finish of the building.

– DO NOT locate vent terminal on the side of

a building with prevailing winter winds. This

will help prevent water lines from freezing and

moisture from freezing on walls and under

eaves.

– DO NOT locate vent terminal too close to

shrubbery, since flue gases may damage

them.

– All painted surfaces should be primed to

lessen the chance of physical damage.

Painted surfaces will require maintenance.

– Guard against accidental contact with people

and pets.

Indoor Tankless Water Heaters

WARNING:

For multiple-unit installation, a minimum distance

between vent terminations must be maintained

to prevent recirculation of vent gases. Maintain

a horizontal center-to-center distance between

vent terminations of 19 in. (48 cm) for two-unit

installation, or 21 in. (53 cm) for installation of three

or more units*.

*Vents cannot be stacked vertically.

– DO NOT terminate vent directly on brick or

masonry surfaces. A rust-resistant, sheet-

metal backing plate is recommended behind

the vent.

– Caulk all cracks, seams, and joints within

6 ft. (1.8 m) of the vent terminal.

– Caulk around wall faceplate for weather-tight

seal.

– DO NOT extend exposed vent pipe of indoor

water heaters outside of the building.

– This water heater requires its own separate

venting system. DO NOT connect the exhaust

vent to an existing vent pipe or chimney.

– Install indoor and outdoor water heaters such that air

inlet and flue outlet are above anticipated snow level�

Rising moisture will collect under eaves.

Inside

Corner

Caulk

If soffit vent is too close,

block off and install new

vent at another location.

Sheet metal plate on brick or

masonry surface recommended.

6' (1.8 m) Caulk zone or

to edge of window etc.,

starting within 6' (1.8 m)

(1.2 m)

Rising moisture will collect under eaves.

Inside

Corner

Caulk

If soffit vent is too close,

block off and install new

vent at another location.

6' (1.8 m) Caulk zone

or to edge of window

etc., starting within

6' (1.8 m)

(1.2 m)

12"

(300 mm)

Venting

minimum 19 in� (48cm)

minimum 21 in� (53cm)

Venting for Direct-Vent Water Heater

Venting

Horizontal Vent Installation

WARNING:

Follow the vent manufacturer’s installation

instructions since design might vary from

manufacturer to manufacturer. Improper vent

installation can result in death, personal injury,

product damage, and/or poor performance.

CAUTION:

Use UL-approved Category III Stainless Steel vent

material only. No other vent material is permitted

for use with this appliance.

Outer casing can be galvanized aluminum or other

material�

Fasteners will vary depending on the wall type�

For particle board or

composite sheathing, use 4

hollow wall anchors. The

anchors should be at least

1/8 in. (0.3 cm) in diameter

and the appropriate length

for the sheathing thickness.

For plywood or solid wood

sheathing or members, use

4 #10 x 1 1/4-in. wood

screws.

For masonry walls, use

suitable masonry anchors

long enough to pass

through the wall.

Reinstall the decorative sheathing around the

faceplate. The decorative sheathing may be

painted to match the exterior decor.

Apply high temperature silicone sealant or silicone/

latex caulk around the vent section. Completely

seal where it passes through the wall plate and

where it is attached to the structure. This will

provide a weather seal for the system, so it must

be a good seal.

Attach the female end of the next vent pipe

section to the male end of the 3-in./5-in.

(7.6-cm/12.7-cm) concentric vent pipe. Push

firmly on the pipe until the outer jacket has made

contact with the snap ring on the male end of the

concentric vent pipe section. Secure the two pipe

sections with the provided self-tapping screws.

NOTICE:

When fully assembled, the outer female end will

overlap the male end about 1 in. (2.5 cm).

DO NOT attempt to fabricate or adapt other vent

pipe or materials to this venting.

INSTALLATION INSTRUCTIONS

Venting for Direct-Vent Water Heater

Horizontal Vent Installation (cont.)

Using a thick bead of high temperature silicone,

seal the overlapping area of the outer 5-in. (12.7-

cm) pipe.

Attach required vent sections between the water

heater collar and the horizontal vent termination.

Typical Horizontal Termination with

1/4 In. Per Foot of DOWNWARD Slope

CAUTION:

The condensate collector must be used in

horizontal terminations if vertical rise in the vent

system exceeds 2 feet (610 mm).*

NOTICES:

• Maintain the proper clearance between the

vent pipe and combustible or noncombustible

materials as described on page 16.

• A clearance of 0 in. (0 cm) is allowed between

the air intake pipes and combustible material.

• Use proper support for the vent and air intake

pipes as described on "Venting".

• Support method used should isolate the

vent pipe from floor joists or other structural

members. This helps prevent transmission of

noise and vibration.

• DO NOT support, pin, or secure the venting

system in a way that restricts the normal

thermal expansion and contraction of the

chosen venting material.

Vent Pipe Wall Plate

Inspection

Access Panel

(Optional)

Inspection

Access Panel

(Optional)

Ceiling Fire

Stop

2' max.*

(610 mm)

1/4" Per Foot Downward Slope

90˚

Elbow

Venting

INSTALLATION INSTRUCTIONS

Venting for Direct-Vent Water Heater

Vertical Vent Installation

WARNING:

Follow the vent manufacturer’s installation

instructions since design might vary from

manufacturer to manufacturer. Improper vent

installation can result in death, personal injury,

product damage, and/or poor performance.

NOTICE:

Only Rheem-approved termination and parts should

be used during installation.

Install a fire stop plate at every penetration of a

floor or ceiling, whenever the vent is not running

through a fire-rated shaft.

Maintain the recommended air space clearance to

combustible materials and building insulation.

Cut a hole through the roof and interior ceiling to

accommodate the vent pipe.

Complete the vent pipe installation to the water

heater vent collar. If required, use high temperature

silicone sealant where the vent connector joins the

water heater.

Support vertical and horizontal runs as described

on "Venting". Vertical supports are required every

4 ft. (1.2 m) along a vertical pipe route, after every

transition to vertical, and after every offset elbow.

NOTICE:

Free-standing vent pipe that penetrates a roof/

ceiling requires another means of support from a

second location.

Determine the vent terminal height and install

the vent pipe accordingly. Refer to “Vertical Vent

Terminal Location” on this Use and Care Manual

for clearance requirements.

Install adequate flashing where the vent pipe

passes through the roof.

Hole

Through Roof

Hole

Through Ceiling

A, B, C, D

INSTALLATION INSTRUCTIONS

Venting

A, B, C, D

Vent Pipe

Through Roof

The following chart with diagrams details the minimum dimensional information needed to determine the proper location

of the vertical vent terminal for direct-vent indoor tankless water heaters:

Location

U�S� Installation

Requirements

Canadian Installation

Requirements

A = Minimum clearance above the roof level� 12 in� (30�5 cm) above roof level� 18 in� (45�7 cm) above roof level�

B = Minimum clearance above anticipated snow level� 12 in� (30�5 cm) above

anticipated snow level�

12 in� (30�5 cm) above anticipated snow

level�

C = Maximum clearance above roof level (without ad-

ditional vent support)�

24 in� (61 cm) above roof level� 24 in� (61 cm) above roof level�

D = Maximum clearance above anticipated snow level

(requires additional vent support)�

24 in� (61 cm) above anticipated snow

level�

24 in� (61 cm) above anticipated snow

level�

E = Required vent clearance from any gable, dormer, or

other roof structure with building access (i�e�, vent,

window)�

4 ft� (1�2 m)� 4 ft� (1�2 m)�

F = Required vent clearance from any forced air inlet,

including dryer and furnace air inlets�

10 ft� (3 m) 6 ft� (1�8 m)

1 In accordance with current ANSI Z223�1/NFPA 54 National Fuel Gas Code�

2 In accordance with current CAN/CSA B149�1 Installation Codes�

NOTICE:

Only manufacturer-approved termination and parts

should be used during installation.

Vertical Vent Terminal Location

Venting for Direct-Vent Water Heater

INSTALLATION INSTRUCTIONS

Venting

Venting for Direct-Vent Water Heater

Standard Vertical Vent Termination

CAUTION:

The condensate collector must

be used with vertical vent

installation.

Support Hanger

Fire Stop

Adjustable

Roof

Flashing

Storm

Collar

Air

Intake

Vertical

Termination

Adapter

Support Clamp

3" to 5" Concentric Pipe

Condensate

Trap

To Drain:

Dispose of

condensate in

accordance to

local codes

1/4" Per Foot Upward Slope

INSTALLATION INSTRUCTIONS

Venting

Water Quality

Water Supply

CAUTION:

This water heater MUST ONLY be used with the

following water supply conditions to prevent

product damage and operation failure.

Clean, potable water free of corrosive chemicals, sand,

dirt, or other contaminates�

Inlet water temperatures above 32°F (0°C), but not

exceeding 120°F (49°C)�

DO NOT reverse the HOT and COLD water connections�

DO NOT connect this heater to water lines previously

used for space heating� All water piping and components

shall be suitable for potable water�

With recommended water quality (See chart above)�

Thermal Expansion

A thermal expansion tank will be required if

the water heater is installed in a system with

a recirculation or storage tank. This prevents

damage to the heater, related piping, and the relief

valve.

NOTICE:

Replacing the relief valve will not correct the

problem!

The expansion tank is designed with a built-in air

cushion that compresses as the system pressure

increases. This relieves the over-pressure condition

and eliminates the repeat operation of the relief

valve.

For other approved methods of thermal expansion,

contact an installing contractor, water supplier, or

plumbing inspector.

Water Supply Connections

CAUTION:

IMPORTANT—DO NOT apply heat to the HOT or

COLD water connections. If sweat connections are

used, sweat tubing to the adapter before fitting

the adapter to the water connections on the water

heater. Any heat applied to the water supply fittings

will permanently damage the internal components

of the water heater.

NOTICE:

In cold environments, ice can accumulate in the

water heater’s connectors. Plug in the water heater

power cord for approximately 10 minutes before

making these connections. This will melt any ice

buildup.

Plumbing should be carried out by a qualified

plumbing contractor in accordance with local

codes.

Only use approved plumbing materials.

To allow the full flow capacity, it is recommended

to keep water inlet and outlet pipes 3/4-in. (1.9-

cm) diameter or larger.

To conserve energy and to prevent freezing,

insulate both COLD and HOT water supply lines.

DO NOT insulate the pressure-relief valve.

Chart for Recommended Water Quality Levels

(Total Dissolved

Solids) TDS

Free Carbon

Dioxide (CO

)

Total

Hardness

Aluminum Chlorides Copper Iron Manganese Zinc

6�5–8�5 Up to 500 mg/L Up to 15 mg/L

Up to

200 mg/L

0�05 to

0�2 mg/L

Up to

250 mg/L

Up to

1�0 mg/L

Up to

0�3 mg/L

Up to

0�05 mg/L

Up to

5 mg/L

Cited reference: National Secondary Drinking Water Regulations

Plumbing

Water quality must be taken into account when

installing and maintaining the water heater. Water

conditions outside of the levels specified below affect

and may damage the water heater. Please note

that the limited warranty provided with the water

heater does not cover defects, malfunctions or

failures resulting from water conditions that are

not in accordance with the specifications in the

table below.

If you nonetheless install this water heater where the

water conditions are not within the levels specified in

the table below, Rheem recommends that you take

the following steps:

• Install a water treatment device or water softener at

the same time as the original installation of the water

heater. Rheem offers a water treatment accessory that

can be installed with the water heater. (See below).

• Flush the water heater’s heat exchanger regularly.

Rheem offers a flush kit and isolation valves to help

remove scale build up. (See below)

Accessory Kit Replacement Filter Tankless Flush Kit Tankless Isolation Valve

AllClear Water Treatment Kit RTG20251 RTG20252

RTG20124 RTG20220AB

Scale Prevention Device RTG20246 RTG20247

Accessory part numbers listed below� See Parts and Accessories Catalog for more information�

INSTALLATION INSTRUCTIONS

Water Supply Installation

NOTICE:

• Use only Teflon tape on all COLD and HOT water

connections.

• If the water flow resistance of a showerhead is

too high, the burner in the water heater will fail

to ignite. Keep all showerheads clean from debris

that could cause additional pressure drop.

• If using mixing valves on the outlet, choose

one that prevents COLD water pressure from

overcoming HOT water pressure.

• If multiple water heaters are installed in a

manifold system, the water piping MUST be in

“parallel” and the water pressure at each water

heater should be 40 psi (276 kPa).

Install a COLD water shut-off valve near the inlet

line on the water heater. This valve will be used for

servicing and draining purposes.

NOTICE:

It is not recommended to use pipes with smaller

diameters than the water supply connection of the

water heater.

Before attaching the water line to the water heater,

open the shut-off valve. Run the water until it

has purged all contaminants (sand, debris, air,

caulking).

Install a service valve on the end of the COLD

water supply line and connect it to the water inlet

on the water heater.

INSTALLATION INSTRUCTIONS

Recirculation

Direct recirculation is allowed, provided the loop

is thermostatically controlled, and a timer is used

to turn the pump off during off peak periods. The

pump must be sized for a minimum of 5 gpm at

25 ft of head plus building head. A 10°F difference

between the loop thermostat setting and water

heater temperature setting must be maintained.

To ensure proper operation of the water heater,

follow these water pressure guidelines.

Operation of the water heater requires a minimum

water pressure of 14 psi (97 kPa) and a minimum

activation water flow rate of 0.4 gpm (1.5 lpm).

Continuous operation of the water heater requires

a minimum water flow rate of 0.25 gpm (1.01 lpm).

Water pressure of 40 psi (276 kPa) is required to

achieve maximum flow rate.

To maintain proper performance, there must be

sufficient water supply pressure.

Required Water Pressure =

Min. Operating Water Pressure

(14 psi [97 kPa])

+ Pipe Pressure Loss

+ Faucet Pressure Loss

+ Safety Margin

(more than 5 psi [34 kPa]).

To supply HOT water to upper floors, additional

water pressure will be required (0.44 psi [3 kPa]

per foot of height). Calculate the distance between

the water inlet of the water heater (ground level) to

the HOT water faucet farthest away from the water

heater (upper floor level).

• Well water systems should be set to ensure a

minimum system pressure of 40 psi (276 kPa).

The pressure should remain constant and stable

during the operation of the water heater.

• Gravity water pressure is not recommended.

When the water is supplied from a water supply

tank, the height of the tank, the diameter of the

supply pipes, and their relation to water pressure

need to be taken into consideration.

Water Supply

Plumbing

INSTALLATION INSTRUCTIONS

Open the drain valve in the COLD water outlet line

to check the water flow through the water heater.

Close the shut-off valve and remove, clean, and

replace the water filter.

NOTICE:

Be sure to connect the COLD water inlet and the

HOT water outlet as shown on the water heater. If

reversed, the water heater will not function.

The flow rate of HOT water may vary when more

than two faucets (appliances, fixtures, etc.) are

being used simultaneously.

The pipes MUST be completely drainable. If the

HOT water faucets are located at a point higher

than the water heater, place a drain valve at the

lowest point.

It is recommended to use unions and flexible

copper connections at the COLD and HOT

water lines. They allow the water heater to be

disconnected easily for servicing.

Use the following guidelines when connecting the

HOT WATER OUTLET:

Connections between the water heater and point(s)

of use should be as short as possible.

Local codes shall govern the piping used for water

connections.

To conserve energy and to prevent freezing,

insulate both COLD and HOT water supply lines.

DO NOT insulate drain line or pressure-relief valve.

Service valve kits can attach to all tankless water

heater systems. All kits include two full-port

isolation valves to be used in the COLD and HOT

water lines. When installed, these valves allow

one person full diagnostic testing and ease of

flushing the system. Contact your distributor or

place of purchase for availability and installation

information.

Alternate Water Piping Arrangement With Preferred Valve Kit

Cold Water

Service Valve

Hot Water

Service Valve

Relief Valve

Water Outlet

Drain

Water

Inlet

Plumbing

Water Supply

INSTALLATION INSTRUCTIONS

Relief Valve

A new pressure-relief valve, complying with the

Standard for Relief Valves and Automatic Gas

Shut-Off Devices for Hot Water Supply Systems,

ANSI Z21.22/CSA 4.4, must be installed at the

HOT water outlet connection of the water heater

during installation. Local codes shall govern the

installation of any relief valves.

NOTICE:

• The following drawing illustrates a pressure-only relief

valve. If local codes require a combination temperature

and pressure-relief valve, you may need to install an

extension piece to ensure that the relief valve probe is

not directly in the flow path of the water.

• Local codes govern the installation of relief valves. If

local codes require that a temperature and pressure-

relief valve be installed, the manufacturer recommends

a type 40XL Watts temperature and pressure-relief

valve or equivalent model be used.

• Manual operation of relief valves should be performed

at least once a year.

• If the relief valve on the system discharges

periodically, a problem exists. Turn off the water

heater, unplug the unit, and call for service.

One end of the relief valve discharge line connects

to the HOT water outlet pipe as shown above.

The other end of the pipe should be routed to a

suitable drain to eliminate potential water damage.

For safe operation of the water heater, be sure

that:

The pressure rating of the relief valve must not

exceed 150 psi (1,034 kPa) or the maximum

working pressure of the water heater. (See the

rating plate on the water heater.)

The BTUH rating of the relief valve must equal or

exceed the BTUH input of the water heater. (See

the rating plate on the water heater.)

No valve of any type should be installed between

the relief valve and the water heater.

Discharge from the relief valve should be piped to

a suitable drain. Piping used should be of a type

approved for the distribution of hot water.

HOT and COLD water lines should be insulated

up to the water heater. See "Water Supply

Installation".

The discharge line must be NO SMALLER than the

outlet of the relief valve. The drain line must pitch

downward to allow for complete drainage of the

line and the valve.

The end of the discharge line should not be

threaded or concealed and should be protected

from freezing. No valve of any type, restriction,

or reducer coupling should be installed in the

discharge line.

Service Valve

Union

Relief Valve

Service

Valve

Hot

Water

Supply

Outlet

Cold Water

Service Valve

Relief Valve

Discharge Line

Plumbing

INSTALLATION INSTRUCTIONS

WARNINGS:

When pipe insulation is not rated for the

appropriate weather conditions, install electric

heat tracing or equivalent to prevent freezing of the

pipes.

DO NOT insulate or block drain valve on the hot

outlet fitting.

If pipes are allowed to freeze, the water heater and

the pipes may malfunction or leak due to freezing

water.

NOTICE:

The hot and cold water supply pipes should be

insulated to provide additional freeze protection.

For increased energy efficiency, use pipe insulation as

shown in the diagram� Insulate the pipes all the way

to the top� DO NOT cover any drain or pressure-relief

valve(s)�

Hot and Cold Pipe Insulation Installation

Gas Supply System

WARNING:

DO NOT attempt to convert this water heater for

use with a different type of gas other than the type

shown on the rating plate. Doing so could result

in death, personal injury, explosion or fire, product

damage, and/or poor operating conditions or

performance.

NOTICE:

Gas piping shall be in accordance with local utility

company requirements and/or in the absence of

local codes, use the latest edition of National Fuel

Gas Code (NFGC), ANSI Z223.1. In Canada, use the

latest edition of CAN/CSA B149.1, Natural Gas and

Propane installation code.

Apply a thin coat of pipe compound to all threaded

male ends. Compound must be of the type

resistant to the action of LP gas.

To ensure proper water heater operation, the gas

pipe and gas meter must be sized correctly.

If flexible connectors are used, the minimum

inside diameter must be 3/4" or greater and the

rated capacity of the connector must be equal

to or greater than the BTU capacity of the water

heater. See manufacturer information for the

gas connector. Lengths over 36 inches are not

recommended.

DO NOT use excessive force when tightening

the pipe sections. Excessive force can damage

the water heater, especially when Teflon pipe

compound is used.

Gas Supply

Cold Water

Service Valve

Relief Valve

Sediment

Trap

Manual Gas

Supply Line

Shut-Off Valve

Manual Gas

Supply Line

Shut-Off Valve

Cap

Union

Drain

Water Outlet

Hot Water

Service Valve

Water

Inlet

Plumbing

Water Supply

INSTALLATION INSTRUCTIONS

Gas Supply

Gas Piping

Pipe-Sizing Procedure

The gas supply system must be properly sized

to ensure the proper operation of this tankless

water heater as well as all the gas appliances on

the system. Failure to ensure the gas system,

(meter, regulators, and piping) are properly sized

could result in improper operation of this or other

gas appliances. Insufficient gas pressure/supply

can cause ignition issues, lockouts, or operating

conditions that could lead to an appliance failure,

improper combustion, carbon monoxide, sooting,

or fire. Gas line sizing is based on gas type, the

pressure drop in the system, the gas pressure

supplied, and the gas line type. For gas pipe

sizing in the United States, refer to the National

Fuel Gas Code, (NFPA 54, ANSI Z223.1). For

Canadian gas pipe sizing, refer to the Natural Gas

and Propane Installation Code CAN/CSA B149.1.

These simplified instructions only address low

pressure gas systems using Schedule 40 Metallic

Pipe (Black Iron). For hybrid gas systems,

high pressure main lines with regulators at the

appliances, gas systems piped with corrugated

stainless steel tubing (CSST), or Propane gas

systems.

Determining the required regulator

and gas meter size.

Find the BTU capacity of each appliance on the

system. This information is located on a rating

label attached to the appliance. Total the BTU

of all the appliances together and divide that

by the heating value of the fuel (for natural gas

the average is 1,024 or 2,546 for propane). This

will give you the total cubic feet per hour of gas

required for the system.

At your gas meter/regulator there will be a rating

plate that gives the cubic feet per hour capacity

of that equipment. If the total gas required for the

system is greater than the rating of the meter/

regulator then the local gas company will need

to be contacted in order to upgrade the meter/

regulator for the system.

Determining the required pipe size.

The gas system is designed to operate at a certain

maximum pressure drop. A pressure drop greater

than what is permissible can cause operational

issues with the gas appliances. The National Fuel

Gas Code (NFPA 54, ANSI Z223.1 2012) allows

for three pressure drop levels, a 0.3 inch W.C.,

(see table 2); a 0.5 inch W.C., (see table 3) and

a 3.0 inch W.C., (see table 4) pressure drop for

natural gas. Only a 0.5 inch W.C. pressure drop is

allowable with Propane (see table 5). For Canadian

installations the maximum allowable pressure drop

is 0.5 inch W.C., (see table 3).

Measure the inlet gas pressure to the system using

a manometer. For Natural Gas, if the inlet pressure

is less than 8.0 inches W.C. then use Table 2 or

3 for your gas pipe sizing. Table 4 can only be

used if the inlet gas pressure is 8.0 inches W.C.

or greater. Table 4 cannot be used for Canadian

installations.

The gas piping system consists of a main trunk

line that runs from the meter/regulator and branch

lines that run from the trunk line to the individual

appliances. A branch may carry gas for more than

one appliance.

The trunk line must be sized to carry the entire

load of all the gas appliances on the system. As

with determining the meter/regulator size, total the

BTU of all the appliances together and divide that

by the heating value of the fuel (for natural gas

the average is 1,024 or 2,546 for propane). This

will give you the total cubic feet per hour of gas

required for the trunk line. Measure the total length

of the line Refer to Table(s) 2, 3, or 4 and find the

number closest to but higher than the total cubic

feet per hour requirement calculation. This will tell

you the minimum size that the trunk line must be.

Each branch line must be sized to carry the load

of the appliance(s) attached to it. If more than

one appliance is on a branch total the BTU and

as with the trunk line divide that by the heating

value of the fuel. Refer to Table(s) 2, 3, or 4 and

find the number closest to but higher than the total

cubic feet per hour requirement calculation for

the branch and appliance(s). This will tell you the

minimum size for that branch line and appliance.

Cubic Feet

Per Hour (CFH) =

Gas Input of

Water Heater (Btu/h)

Heating Value of Gas (BTU/FT

)

Gas Supply

Table 3 - Pipe-Sizing - Natural Gas

Schedule 40 Metallic Pipe (Black Iron)

Inlet System Pressure: Less than 2 PSI (55 inches W.C.)

Allowable Pressure Drop: 0.5 inches W.C.

Speciﬁc Gravity : 0.60

(Capacity in cubic feet per hour)

Length Pipe Size (Inches)

½ ¾ 1 1¼ 1½

10 172 360 678 1390 2090

20 118 247 466 957 1430

30 95 199 374 768 1150

40 81 170 320 657 985

50 72 151 284 583 873

60 65 137 257 528 791

70 60 126 237 486 728

80 56 117 220 452 677

90 52 110 207 424 635

100 50 104 195 400 600

Information in this chart obtained from NFPA 54, ANSI Z223.1 - 2012 Table 6.2(b)

Table 4 - Pipe-Sizing - Natural Gas

Schedule 40 Metallic Pipe (Black Iron)

Inlet System Pressure: 8.0 inches W.C. or greater, but Less than 2 PSI (55

inches W.C.)

Allowable Pressure Drop: 3.0 inches W.C.

Speciﬁc Gravity : 0.60

(Capacity in cubic feet per hour)

Length Pipe Size (Inches)

½ ¾ 1 1¼ 1½

10 454 949 1,787 3,669 5,497

20 312 652 1,228 2,522 3,778

30 250 524 986 2,025 3,778

40 214 448 844 1,733 2,597

50 190 387 748 1,536 2,302

60 172 360 678 1,392 2,085

70 158 331 624 1,280 1,919

80 147 308 580 1,191 1,785

90 138 289 544 1,118 1,675

100 131 273 514 1,056 1,582

Information in this chart obtained from NFPA 54, ANSI Z223.1 - 2012 Table 6.2(c)

Table 5 - Pipe-Sizing - Undiluted Propane

Schedule 40 Metallic Pipe (Black Iron)

Inlet System Pressure: 11 inches W.C.

Allowable Pressure Drop: 0.5 inches W.C.

Speciﬁc Gravity : 1.5

(Capacity in cubic feet per hour)

Length Pipe Size (Inches)

½ ¾ 1 1¼ 1½

10 291 608 1150 2350 3520

20 200 418 787 1620 2420

30 160 336 632 1300 1940

40 137 287 541 1110 1660

50 122 255 480 985 1480

60 110 231 434 892 1340

80 101 212 400 821 1230

100 94 197 372 763 1140

125 89 185 349 716 1070

150 84 175 330 677 1010

Information in this chart obtained from NFPA 54, ANSI Z223.1 - 2012 Table 6.3(d)

Table 2 - Pipe-Sizing - Natural Gas

Schedule 40 Metallic Pipe (Black Iron)

Inlet System Pressure: Less than 2 PSI (55 inches W.C.)

Allowable Pressure Drop: 0.3 inches W.C.

Speciﬁc Gravity : 0.60

(Capacity in cubic feet per hour)

Length Pipe Size (Inches)

½ ¾ 1 1¼ 1½

10 131 273 514 1,060 1,580

20 90 188 355 726 1,090

30 72 151 284 583 873

40 62 129 243 499 747

50 55 114 215 442 662

60 50 104 195 400 600

70 46 95 179 368 552

80 42 89 167 343 514

90 40 83 157 322 482

100 38 79 148 304 455

Information in this chart obtained from NFPA 54, ANSI Z223.1 - 2012 Table 6.2(a)

Final Considerations

If this water heater is replacing an existing water

heater, it is important to verify the capacity of the gas

system. Check the capacity of the meter/regulator, and

verify the pipe lengths and sizes.

An improperly sized gas system will cause operational

issues with this water heater. Other appliances on the

gas system may be affected as well.

Flexible Gas Connectors may be used; however, the

BTU capacity of the connector must be checked. Each

connector has a capacity label on it, verify that the

connector has a BTU capacity greater than that of the

water heater. An undersized flexible gas connector will

cause operational issues with this water heater.

Half-inch gas lines are permissible provided the gas

system meets certain requirements. First, the gas

pressure on the system must be 8.0 inch W.C. or

greater. Second the capacity of the pipe as outlined in

Table 4 is followed. If the existing pipes are too small

it could cause a pressure drop greater than 3.0 inch

W.C. and will cause operational issues with this water

heater as well as other gas appliances on the system.

This is an example, in US, refer to current National Fuel

Gas Code, NFPA 54 for correct pipe sizing chart, and

in Canada, refer to current Natural Gas and Propane

Installation Code CAN/CSA B149.1.

INSTALLATION INSTRUCTIONS

Gas Supply

Gas Supply Installation

Install the manual gas appliance shut-off valve to

the gas connection at the water heater. The shut-

off is supplied with the water heater.

Install a ground joint union or ANSI design-certified

semi-rigid or flexible gas appliance connector to

the open end of the manual gas appliance shut-

off valve. The (NFGC) ANSI Z223.1 and CAN/CSA

B149.1 codes mandate the use of manual gas

shut-off valves.

Install a manual gas supply line shut-off valve to

the end of the gas supply line.

Using the proper-size piping, fittings, and

components, build the gas supply line to the water

heater.

NOTICE:

The gas supply line should be a minimum of 3/4-

in. (1.9-cm) black steel pipe or other approved gas

piping material.

Install a sediment trap at the lowest portion of the gas

line�

The inlet gas pressure to the water heater must NOT

exceed 10�5 in� w�c� (2�6 kPa) for natural gas and 13

in� w�c� (3�2 kPa) for LP gas� For purposes of input

adjustment, the minimum inlet gas pressure (with main

burner on) is shown on the water heater rating plate� If

high or low gas pressures are present, contact your gas

supplier for correction�

Gas Supply

INSTALLATION INSTRUCTIONS

Leak Testing

WARNING:

Never use an open flame to test for gas leaks,

because death, personal injury, and/or property

damage can result.

The water heater and its gas connections MUST

be leak-tested at normal operating pressures

before the unit is placed in operation. These tests

should also include all factory connections.

Turn on the gas shut-off valve(s) to the water

heater.

Use a soapy water solution to test for leaks at all

the connections and fittings. If bubbles are seen, it

indicates a gas leak that must be corrected.

Contact a qualified service technician.

Pressure Testing the Gas Supply System

CAUTION:

If inlet gas pressure is out of allowable range [4.0”

w.c. (1.0kPa) – 10.5” w.c. (2.6kPa)] for Natural Gas,

or [8.0” w.c. (2.0kPa) – 13.0” w.c. (3.2kPa)] for LP

gas, a gas pressure regulator must be installed to

maintain the allowable inlet gas pressure.

The water heater and its manual gas shut-off valve

must be disconnected from the gas supply piping

system whenever the pressure testing will exceed

1/2 psi (14 in. w.c. [3.5 kPa]).

The water heater must be isolated from the gas

piping system whenever the pressure testing

will be less than and/or up to 1/2 psi (14 in. w.c.

[3.5 kPa]). Closing the manual gas shut-off valve

will isolate the water heater from the gas piping

system.

Gas Supply

INSTALLATION INSTRUCTIONS

Electrical Wiring

DANGER:

Shock Hazard – Before servicing the water heater,

turn off the electrical power to the water heater at

the main disconnect or circuit breaker. Failure to do

so will result in death or serious personal injury.

WARNING:

Field wiring connections and electrical grounding

must comply with local codes or, in the absence of

local codes, with the latest edition of the National

Electrical Code, ANSI/NFPA 70, in the U.S., or

Canadian Electrical Code, CAN/CSA C22.1, Part 1, in

Canada.

CAUTION:

Labeling all wires prior to disconnection is

recommended. Wiring errors can cause personal

injury, product damage, and/or dangerous operating

conditions. Verify correct operation after servicing.

NOTICE:

• DO NOT connect power until venting installation is

complete (see Venting Installation).

• Wait ninety (90) seconds after power is connected for

the first time to initiate operation of the water heater.

• Power consumption is up to 100 Watts during normal

operation, 3-5 Watts during standby, (waiting to run), and

up to 200 Watts during the freeze protection operation.

Power Cord

The electric power supply requirement for this

water heater is 120 VAC/60 Hz, 2 Amps.

A dedicated circuit is recommended for the water

heater. DO NOT connect to a GFCI or AFCI circuit.

Multiple units may be connected to a single circuit

up to the circuit rating.

DO NOT use 3-prong to 2-prong adapters. DO

NOT use power strips or multiple outlet adapters.

All direct-vent gas models come with a three-

prong power cord. Only use this power cord and a

matching grounded electrical outlet.

All outdoor gas models do not come with a power

cord. Only hard-wire to an appropriate power

outlet with a ground terminal.

Keep any excess length of the power supply cord

on the outside of the water heater.

If local codes require hard-wiring, see instructions

for “Hard-Wiring the Electrical Connections”

below.

Hard-Wiring the Electrical

Connections

Wiring should be performed by a qualified

electrician in accordance with local codes.

The water heater requires a properly grounded 120

VAC/60 Hz power supply. Multiple water heaters

may be connected to a single circuit up to that

circuit’s rating.

DO NOT connect grounding wire to water pipes,

gas pipes, telephone cables, lighting conductor

circuits, or to any other grounding circuits that

require a GFCI or AFCI (arc fault circuit interrupter).

An ON/OFF switch must be provided and installed

for the incoming 120 VAC power supply.

Wire the water heater exactly as shown in the

wiring diagram. This wiring diagram can also be

found inside the water heater cover panel.

The green screw is provided in the enclosure for a

grounding connection.

Connect the live wire to the black wire and neutral

wire to the white neutral wire.

High-Altitude Installation

WARNING:

DO NOT install this water heater at elevations above

2000 ft. (610 m) without the proper adjustments.

Failure to install a water heater suitable for the

altitude at the location it is intended to serve

can result in improper operation of the appliance

resulting in property damage and/or producing

carbon monoxide gas, which could result in

personal injury or death.

NOTICE:

For installations above 2000 ft. (610 m) elevation,

contact a qualified service technician to make the

proper altitude adjustments. You can also contact

your local gas supplier, place of purchase, or call

the Rheem Customer Service phone number listed

in the "Call for Assistance" section. See "High-

Altitude DIP Switch Adjustments" for additional

information.

INSTALLATION INSTRUCTIONS

Gas Supply

Electrical

Gas Supply

Electrical

Electrical Wiring

Wiring Diagram

INSTALLATION INSTRUCTIONS

１

①

③ ④

②

③ ①

②④

ＧＮＤ

ＩＧ

Ｗ

ANTI-FROST HEATER

CHAUFFAGE ANTI-GIVRE

YG YG

２

１

FLAMEROD

DÉTECTEUR DE

FLAMMES

６５４３２１

４

３

２

１

DISPLAY

AFFICHAGE

１

２

３

４

５

１

２

３

GAS TYPE

CIRCUIT BOARD

PLAQUE DE CIRCUIT

IMPRIMÉ TYPE GAZ

１

２

３

４

５

６

７

８

９

１

２

３

４

５

６

７

８

９

１０

１１

Ｒ

Ｗ

Ｙ

Ｗ

ＢＫ

ＢＬ

ＢＫ

ＢＬ

WATER FLOW SENSOR

CAPTEUR DE DÉBIT D'EAU

HEAT EXCHANGER THERMISTOR

THERMISTANCE ÉCHANGEUR DE CHALEUR

HOT WATER OUTLET THERMISTOR

THERMISTANCE SORTIE D'EAU CHAUDE

OVER HEAT LIMITER

LIMITEUR DE SURCHAUFFE

AMBIENT AIR THERMISTOR

THERMISTANCE D'AIR AMBIANT

⑮

① ②

③ ④

⑤ ⑥

G／Y

Ａ

Ｂ

Ｃ

Ｄ

Ｅ

Ｆ

Ｇ

Ｍ

Ｎ

Ｋ

Ｏ

Ｉ

Ｈ

Ｌ

LIMITER

LIMITEUR

MOTOR

MOTEUR

WATER BY-PASS

CONTROL MOTOR

　　　　　　　MOTEUR MÉLANGE D'EAU

WATER VOLUME

CONTROL MOTOR

　　　　　　MOTEUR DÉBIT D'EAU

120V

G／YorG

GND

USUALLY

DISCONNECTED

NORMALEMENT

DÉCONNECTÉ

　　　　VERT／JAUNE

G／Y：GREEN／YELLOW，

　　O：ORANGE，ORANGE

COLOR CODE

　　R：RED，ROUGE

　　W：WHITE，BLANC

　BR：BROWN，MARRON

　BL：BLUE，BLEU

　BK：BLACK，NOIR

　GY：GRAY，GRIS

　　G：GREEN，VERT

　　Y：YELLOW，JAUNE

CODE COULEUR

　　P：PINK，ROSE

　PU：PURPLE，VIOLET

ＰＳＶ

ＳＶ４

ＳＶ０

ＳＶ１

ＳＶ２

ＳＶ３

＋

－

SOLENOID VALVE 4

ÉLECTROVALVE 4

SOLENOID VALVE 3

ÉLECTROVALVE　3

SOLENOID VALVE 2

ÉLECTROVALVE　2

SOLENOID VALVE 1

ÉLECTROVALVE　1

GAS INLET SOLENOID VALVE 0

ÉLECTROVALVE 0 D'ADMISSION DE GAZ

⑦ ⑧

⑨ ⑩

⑪ ⑫

⑬ ⑭

⑯

①

③

⑤

⑦

⑨

⑪

⑬

⑮

１

２

３

４

５

Ｇ

WIFI MODEL

MODÈLE WIFI

FOR NON-WIFI MODEL ONLY

UNIQUEMENT POUR MODÈLE

SANS WIFI

FOR WIFI MODEL ONLY

UNIQUEMENT POUR MODÈLE WIFI

ＦＭ

FAN MOTOR

VENTILATEUR DU MOTEUR

P.G.F.R VALVE

VALVE P.G.F.R

４１－３４３０１　１

WATER LEAK SENSOR

CAPTEUR DE FUITE D'EAU

MIN BUTTON

SW２

SW３

ADJUSTER BUTTON

BOUTON DE RÉGLAGE

MAX BUTTON

BOUTON MAX

BOUTON MIN

SW１

MARCHE

DIP SWITCH2

CONTACTEUR DIP2

OFF

ARRÊT

MARCHE

DIP　SWITC1

ARRÊT

CONTACTEUR　DIP1

OFF

１２

３

４

１

２

３

４

DIP１DIP２

SW１SW２

SW３

LED

WATER LEVEL ELECTRODE

ÉLECTRODE DE NIVEAU D’EAU

FOR CONDENSING MODEL ONLY

FOR INDOOR,DIRECT-VENT

MODEL ONLY

POUR MODÈLE INTÉRIEUR À

VENT DIRECT SEULEMENT

BATH REMOTE

CONTROL 1

BATH REMOTE

CONTROL ２

（USC1－117）

FUSE(10A)

FUSIBLE(10A)

１

２

３

４

WIRING DIAGRAM

（）

LIMITER

LIMITEUR

MOTOR

MOTEUR

G R BRBL W O Y BK G R BR

BLW O Y

UNIQUEMENT POUR MODÈLE DE CONDENSAGE

②

④

⑥

⑧

⑩

⑫

⑭

⑯

TÉLÉCOMMANDE 1

<<DE BAIN>>

TÉLÉCOMMANDE 2

<<DE BAIN>>

（USC2－117）

１

①

③ ④

②

③ ①

②④

ＧＮＤ

ＩＧ

IGNITER

ALLUMEUR

Ｗ

ANTI-FROST HEATER

CHAUFFAGE ANTI-GIVRE

YG YG

２

１

FLAMEROD

DÉTECTEUR DE

FLAMMES

６５４３２１

４

３

２

１

DISPLAY

AFFICHAGE

１

２

３

４

５

１

２

３

GAS TYPE

CIRCUIT BOARD

PLAQUE DE CIRCUIT

IMPRIMÉ TYPE GAZ

１

２

３

４

５

６

７

８

９

１

２

３

４

５

６

７

８

９

１０

１１

Ｒ

Ｗ

Ｙ

Ｗ

ＢＫ

ＢＬ

ＢＫ

ＢＬ

WATER FLOW SENSOR

CAPTEUR DE DÉBIT D'EAU

WATER INLET THERMISTOR

THERMISTANCE ENTREE D'EAU FROIDE

HEAT EXCHANGER THERMISTOR

THERMISTANCE ÉCHANGEUR DE CHALEUR

OVER HEAT LIMITER

LIMITEUR DE SURCHAUFFE

AMBIENT AIR THERMISTOR

THERMISTANCE D'AIR AMBIANT

⑮

① ②

③ ④

⑤ ⑥

G／Y

Ａ

Ｃ

Ｄ

Ｅ

Ｆ

Ｇ

Ｍ

Ｎ

Ｋ

Ｏ

Ｉ

Ｈ

Ｌ

LIMITER

LIMITEUR

MOTOR

MOTEUR

WATER BY-PASS

CONTROL MOTOR

　　　　　　　MOTEUR MÉLANGE D'EAU

WATER VOLUME

CONTROL MOTOR

　　　　　　MOTEUR DÉBIT D'EAU

G／YorG

GND

BK OR W

USUALLY

DISCONNECTED

NORMALEMENT

DÉCONNECTÉ

　　　　VERT／JAUNE

G／Y：GREEN／YELLOW，

　　O：ORANGE，ORANGE

COLOR CODE

　　R：RED，ROUGE

　　W：WHITE，

　BR：BROWN，MARRON

　BL：BLUE，BLEU

　BK：BLACK，NOIR

　GY：GRAY，GRIS

　　G：GREEN，VERT

　　Y：YELLOW，JAUNE

CODE COULEUR

　　P：PINK，ROSE

　PU：PURPLE，VIOLET

ＰＳＶ

ＳＶ４

ＳＶ０

ＳＶ１

ＳＶ２

ＳＶ３

＋

－

SOLENOID VALVE 4

ÉLECTROVALVE 4

SOLENOID VALVE 3

ÉLECTROVALVE　3

SOLENOID VALVE 2

ÉLECTROVALVE　2

SOLENOID VALVE 1

ÉLECTROVALVE　1

GAS INLET SOLENOID VALVE 0

ÉLECTROVALVE 0 D'ADMISSION DE GAZ

⑦ ⑧

⑨ ⑩

⑪ ⑫

⑬ ⑭

⑯

①

③

⑤

⑦

⑨

⑪

１

２

３

４

５

Ｗ

Ｇ

ＦＭ

FAN MOTOR

VENTILATEUR DU MOTEUR

FOR OUTDOOR MODEL ONLY

UNIQUEMENT POUR MODÈLE À USAGE EXTÉRIEUR

P.G.F.R VALVE

VALVE P.G.F.R

WATER LEAK SENSOR

CAPTEUR DE FUITE D'EAU

MIN BUTTON

SW２

SW３

ADJUSTER BUTTON

BOUTON DE RÉGLAGE

MAX BUTTON

BOUTON MAX

BOUTON MIN

SW１

MARCHE

DIP SWITCH2

CONTACTEUR DIP2

OFF

ARRÊT

MARCHE

DIP　SWITC1

ARRÊT

CONTACTEUR　DIP1

OFF

１２

３

４

１

２

３

４

DIP１DIP２

SW１SW２

SW３

LED

ÉLECTRODE DE NIVEAU D’EAU

FOR CONDENSING MODEL ONLY

BATH REMOTE

CONTROL 1

BATH REMOTE

CONTROL ２

（USC1－117）

１

２

３

４

TO PUMP

À LA POMPE

SCHÉMA DE CÂBLAGE

WIRING DIAGRAM

（）

LIMITER

LIMITEUR

MOTOR

MOTEUR

G R BRBL W O Y BK G R BR

BLW O Y

UNIQUEMENT POUR MODÈLE DE CONDENSAGE

②

④

⑥

⑧

⑩

⑫

⑭

⑯

BK OR W

TÉLÉCOMMANDE 1

<<DE BAIN>>

TÉLÉCOMMANDE 2

<<DE BAIN>>

（USC2－117）

BLBK

O Y

CIRCUIT BOARD

PLAQUE DE CIRCUIT

UNIQUEMENT POUR

MODÈLE DE CONDENSAGE

FOR CONDENSING MODEL ONLY

ＢＫ

THERMOSTAT

UNIQUEMENT POUR

MODÈLE DE CONDENSAGE

FOR CONDENSING MODEL ONLY

MAIN REMOTE

CONTROL

TÉLÉCOMMANDE

<<MAIN>>

（UMC-117）

５６

Electrical Wiring

Remote Control Selection and Location

WARNING:

Field wiring connections and electrical grounding must

comply with local codes or, in the absence of local

codes, with the latest edition of the National Electrical

Code, ANSI/NFPA 70, or in Canada, Canadian Electrical

Code, CAN/CSA C22.1, Part 1.

NOTICE:

The provided remote control will allow maximum

temperature settings of 120°F (49°C). Temperatures up to

140°F (60°C) for residential applications can be achieved

with the MAIN (UMC-117) remote control. Only qualified

service personnel should perform this adjustment.

• An optional cable (EZ Link

Cable

) can be purchased

separately to manifold two water

heaters together.

• DO NOT attempt to disassemble a

remote control. All controls are

sealed and calibrated for accurate

water heater control and operation.

One remote control is provided with the water

heater. Additional remote controls may be

purchased separately. The available remote

controls are listed in the following chart. Up to

three remote controls can be used with the water

heater. No other manufacturer’s controls are

suitable for use with this water heater.

Review the following considerations before

determining the location of the remote control(s):

• DO NOT install any remote control

outdoors or where it can come in

contact with water.

•

Avoid installing the remote control in the

following areas and/or conditions:

– area exposed to heat.

– area exposed to steam.

– area exposed to oil.

– area exposed to direct sunlight.

– areas near stored or used

flammable products.

Place remote control out of children’s reach.

The remote control should be installed in a

convenient location (e.g., kitchen, laundry room,

utility room, or directly next to the water heater).

The maximum distance between the water heater

and the remote control installation location is

limited to 195 ft. (59 m) of wire.

Remote Control

Model Number

Remote Control

Description

Temperature

Set Point Range Availability

UMC-117 MAIN

100°F–120°F (38°C–49°C)

Factory Default

125°F–140°F (52°C–60°C)

Adjustment for Residential Products

USC1-117

BATH 1

100°F–120°F (38°C–49°C)

Optional (Sold Separately)

USC2-117 BATH 2

100°F–120°F (38°C–49°C)

Optional (Sold Separately)

MIC-6 or MIC-185**

Manifold System

Manifold System Optional (Sold Separately)

**When a manifold system is installed, the main remote control connected to the manifold controller

(MIC-6 or MIC-185) has priority over the remote controls connected to the water heater.

INSTALLATION INSTRUCTIONS

Electrical

WARNING:

Field wiring connections and electrical grounding must

comply with local codes or, in the absence of local

codes, with the latest edition of the National Electrical

Code, ANSI/NFPA 70, or in Canada, Canadian Electrical

Code, CAN/CSA C22.1, Part 1.

NOTICE:

Remote control cable needs to be type CL3R/CMR shielded

security wire equivalent (18 AWG) and need not to be

polarity-sensitive.

It is not recommended to have wiring exposed.

DO NOT apply sealant to remote control cable.

DO NOT use network cable, telephone wire, or any

twisted-pair cable.

Connecting the MAIN (UMC-117) Remote Control

to a Wall:

Drill a 1- to 1 1/2-in. (2.5/3.8-cm) hole at the

proposed control location. Install the remote

control cable between the location of the remote

control and the water heater.

Remove the remote control from the base plate.

Feed the remote control cable through the large

center hole in the base plate.

Install the base plate to the wall using suitable

screws and wall anchors.

NOTICE:

The tabs on the base plate should always point out.

Connect the remote control to the remote control

cable.

Position the remote control on the base plate.

NOTICE:

The tabs on the base plate should line up with the

slots on the back of the remote control.

Secure the remote control to the base plate with one

screw into the bottom tab.

NOTICE:

DO NOT attempt to connect the remote control or

control wire to the water heater while the water heater

has power applied to it. Damage to the water heater

will occur. DO NOT cut or strip the wiring while it is

connected to the water heater or while the water

heater has power applied to it.

Remote Control Installation (Outdoor Models)

INSTALLATION INSTRUCTIONS

Electrical

Remote Control Installation (Outdoor Models Only)

Remote Control Installation (cont.)

Connecting the Remote Control to the Water

Heater:

Ensure that the power to the water heater has

been disconnected.

Remove the front cover panel on the water heater.

NOTICE:

Connect the remote control extension cables

from the remote control to the remote control

connection terminals.

NOTICE:

The remote control wire connection terminals are

not polarity-sensitive.

Firmly tighten the terminal screws by hand.

Reinstall the front cover panel on the water heater.

Switch on the power supply to the water heater.

Check for proper operation of the remote control

and the water heater.

DO NOT connect remote control to power supply.

The remote control connectors are located on the

right side of the PCB.

INSTALLATION INSTRUCTIONS

Electrical

INSTALLATION INSTRUCTIONS

NOTICE:

Wifi remote must be installed Indoors.

Drill a 1- to 1 1/2 in. hole at the proposed control

location. Run the control cable between the

.retaeh retaw eht dna lortnoc etomer eht fo noitacol

Install the base of the wall mount to the wall using

2 included screws.

Install the wifi display into the wall mount by

resting the bottom tab into the slot on the wall

mount. Then push the top tab of the wifi diplay

into the retention clips and connect the wire

harness.

Install the front cover over the wifi display and

snap it in to secure.

Plug the other end of the cable into the PCB of the

water heater, which will be indoors.

WiFi Remote Circulation (Certain Models Only)

Electrical

Insulation Blankets

In general, insulation blankets for external use on gas

water heaters are not necessary� The purpose of an

insulation blanket is to reduce the standby heat loss

from the water heater’s storage tank� Since these water

heaters do not store water, they eliminate the need for the

insulation blanket�

WARNING:

NEVER cover the air inlet, flue outlet, or operating

and warning labels attached to the water heater.

Covering these components will cause dangerous

operating conditions that can lead to death,

personal injury, property damage, and/or product

damage.

The manufacturer’s warranty does not cover any damage

or defect caused by insulation, insulation attachment, or

use of any type of energy-saving or other unapproved

devices (unless authorized by the manufacturer)� The

use of unauthorized energy-saving devices can result

in death, personal injury, and/or property damage� The

manufacturer disclaims any responsibility for such loss

or injury resulting from the use of such unauthorized

devices�

Installation Precautions

Follow all installation instructions covered in this

manual.

Check the inlet gas pressure to make sure it is

within the range specified on the rating plate.

Make sure there is adequate air for combustion

and ventilation as described on "Venting" in this

manual.

Maintain proper clearances to combustibles and

non combustibles as specified on the rating plate.

Make sure the venting system complies with local

codes, National Fuel Gas Codes (ANSI Z223.1/

NFPA 54) or CAN/CSA B149.1, and the guidelines

found on "Venting" in this manual.

Contact the local gas company to make sure the

gas meter and gas piping are adequately sized.

Use Teflon tape on all male water line connections

and fittings.

DO NOT block or restrict any air intake openings.

DO NOT remove the front cover unless absolutely

necessary. This should only be done by a qualified

service technician.

DO NOT install this product where standing water

may occur.

DO NOT use pipe dope on water line connections

and fittings.

Electrical

INSTALLATION INSTRUCTIONS

Installation Checklist

Indoor water heaters must be installed indoors�

Outdoor water heaters must be installed outdoors�

Close to area of ventilation termination

(indoor models)�

Protected from freezing temperatures�

Proper clearance from combustible material

observed�

Sufficient fresh air supply for proper operation of

water heater�

Air supply free of corrosive elements and flammable

vapors�

Provisions made to protect area from water

damage�

Sufficient room to service heater�

Combustible materials, such as clothing, cleaning

materials, and rags, clear of the heater and vent

piping�

Water heater is properly attached to the wall�

A. Water Heater Location

B. Coaxial Vent (Indoor Models)

Vent pipe material is Category III and is

manufacturer-approved�

Horizontal vent runs have 1/4 in� per foot of

DOWNWARD slope towards the vent terminal�

Vertical venting is installed as described in the

"Vertical Vent Installation" section�

Connector(s) securely fastened together with high-

temperature silicone (500°F [260°C]) and airtight�

All coaxial vent runs are properly installed�

Vent terminal is properly installed�

Maximum vent length is observed�

Water supply has sufficient pressure�

Air has been purged from the water heater and the

piping�

Water connections tight and free from leaks�

Water filter is clean and in place�

All piping has been assembled as described on

"Water Supply"�

Water pipes are insulated and protected from

freezing, if necessary�

Pressure-relief valve properly installed with

discharge line running to open drain�

Discharge line protected from freezing, if necessary�

C. Water Supply/Relief Valve

Gas type matches listing on rating plate�

Gas supply pressure is sufficient for the water

heater�

Gas line equipped with shut-off valve, union, and

sediment trap as described on "Gas Supply System"�

Approved pipe-joint compound has been used on all

gas pipe connections�

All connections and fittings have been checked for

leaks with a soapy water solution�

Gas company inspected installation (if required)�

D. Gas Supply

Supply cord and/or wiring meets all local codes,

National Electrical Code, ANSI/NFPA 70, in the U�S�,

or Canadian Electrical Code, CAN/CSA C22�1, Part

1, in Canada�

Voltage matches listing on rating plate�

Water heater is properly grounded�

E. Electrical Wiring

Drain hose is attached to the condensate collector,

and condensate is drained as described on

"Draining Vent Condensate"�

F. Condensate

Checklist

INSTALLATION INSTRUCTIONS

Activating the Water Heater

WARNING:

Before operating this water heater, be sure to read

and follow the instructions on the following label,

all labels on the water heater, and the “Important

Safety Information” section in this manual. Failure

to do so can result in unsafe operating conditions

that can result in death, personal injury, property

damage, and/or product damage.

NOTICE:

If you have any problems reading or following

the instructions in this manual, STOP and call a

qualified service technician or contractor.

WARNING : If you do not follow these instructions exactly, a fire or explosion may result

causing property damage, personal injury or loss of life.

FOR YOUR SAFETY READ BEFORE OPERATING

1.STOP! Read the safety information above on this label.

2.Turn off all electric power to the appliance.

3.Do not attempt to light the burner by hand.

4.Turn the Gas Shutoff Valve located on the outside of the unit

clockwise to the "OFF" position.

5.Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Follow "B" in

the safety information above on this label. If you don't smell gas, go to the next step.

6.Turn the Gas Shutoff Valve located on the outside of the unit counterclockwise to

the "ON" position.

7.Turn on all electric power to the appliance.

8.If the appliance will not operate, follow the instructions "To Turn Off Gas To Appliance"

and call your service technician or gas supplier.

TO TURN OFF GAS TO APPLIANCE

Turn off all electric power to the appliance if service is to be performed.

Turn

the

Gas

Shutoff

Valve

located

the

outside

the

unit

clockwise to

the

"OFF"

position.

GAS SHUTOFF

VALVE

OPEN CLOSE

OPERATING INSTRUCTIONS

USING YOUR WATER HEATER

Start/Adjust

Read, understand, and follow the safety

information listed on the operating label and in

the “Important Safety Information” section in this

manual.

Disconnect all electric power to the water heater.

Turn the gas shut-off valve clockwise to the OFF

position. This valve is located on the outside of the

water heater. Wait 5 minutes to clear any gas. If

you don’t smell gas, proceed to Step 3.

NOTICE:

If you smell gas, STOP and follow the safety

instructions listed under B on the operating label or

on the front cover of this manual.

Turn the gas shut-off valve counterclockwise to the ON

position�

Turn on all electric power to the water heater.

The remote control must be powered on prior to

operating the water heater.

WARNING:

DO NOT attempt to light the burner by hand.

Lighting the burner by hand is an unsafe operating

condition that can result in death, personal injury,

property damage, and/or product damage.

If the water heater burner will not light, turn off

the water heater as described below and call your

service technician or gas supplier.

Shutting Off the Water Heater

Disconnect all electric power to the water heater.

Turn the gas shut-off valve clockwise to the OFF

position.

USING YOUR WATER HEATER

Start/Adjust

Operating Instructions

Use Instructions

WARNING:

• Flammable vapors can be drawn by air

currents from surrounding areas to the water

heater. Vapors can ignite causing death,

personal injury, or product damage.

• DO NOT store or use flammable or

combustible materials (gasoline, paint thinner,

adhesives, newspapers, rags, mops, etc.) in

the vicinity of the water heater or any other

gas appliance. If they must be used, open

doors and windows for ventilation, and shut

off all gas-burning appliances, including their

pilot lights.

• DO turn off manual gas shut-off valve if water

heater has been subjected to overheating,

fire, flood, physical damage, or if the gas

supply fails to shut off.

• DO NOT turn on water heater unless water

and gas supplies are completely opened.

• If there is any difficulty in understanding or

following the operating and care instructions

in this manual, it is recommended that you

contact a qualified service technician to

perform the work.

Safety Precautions

Setting the Water Temperature

DANGER

HOT

BURN

Water temperature over 125°F (52°C)

can cause severe burns instantly or

death from scalds.

Children, disabled and elderly are at

highest risk of being scalded.

See instruction manual before

setting temperature at water heater.

Feel water before bathing or

showering.

Temperature limiting valves are

available, see manual.

DANGER:

Water temperatures above 125°F (52°C) will result in death

and/or severe burns from scalding.

Safety and energy conservation are factors to be considered

when selecting the water temperature setting. The

temperature of the water in the water heater can be regulated

by setting the temperature on the front of the remote control.

Be sure to read and follow the warnings outlined on the

pictured label.

The remote control has been preset and shipped at the

recommended temperature setting.

Safety factors should be considered whenever altering the

water temperature setting. The chart below may be used as

a guide in determining the proper water temperature for your

home.

Time/Temperature Relationship in Scalds

120°F (49°C) More than 5 minutes

125°F (52°C) 1 1/2 to 2 minutes

130°F (54°C) About 30 seconds

135°F (57°C) About 10 seconds

140°F (60°C) Less than 5 seconds

145°F (63°C) Less than 3 seconds

150°F (66°C) About 1 1/2 seconds

155°F (68°C) About 1 second

Table courtesy of Shriners Burn Institute

Water Time to Produce

Temperature a Serious Burn

USING YOUR WATER HEATER

Maximum water temperature occurs while the

water heater burner is on. To determine the water

temperature:

Turn on the hot water faucet and place a

thermometer in the water stream.

NOTICE:

Water temperature at the faucet may vary

depending on the season and the length of pipe

from the water heater.

The control temperature range is between 100°F (38°C)

and 120°F (49°C)� To adjust the temperature to a desired

setting, press the UP or DOWN adjustment button on the

face of the control� The new temperature set point will

show on the LED display�

NOTICE:

The temperature set point on the standard remote

control cannot be increased above 112°F (44°C)

when a hot water faucet is in the open position.

To achieve temperatures above 120°F (49°C),

contact a qualified service technician. Only

factory-authorized remote control(s) should be

used.

The water heater may not operate with a small water flow

(<0�4 gpm)� Increase the water flow and recheck� If it still

does not operate with the hot water faucet completely open,

increase the temperature setting on the remote control�

Water Heater Facts

DANGER:

Water temperatures above 125°F (52°C) will result

in death and/or severe burns from scalding.

• The hottest-temperature water will be at the faucet closest

to the water heater�

• Always remember to test the water temperature with your

hand before use�

• Always supervise young children or others who are

incapacitated�

• The water heater is equipped with a device that will shut

off the gas supply to the burner if the water heater exceeds

normal operating temperatures�

• Any water heater that has been subjected to fire, flood,

physical damage, or been under water should be turned off

at the manual gas shut-off valve and not used until it has

been checked by qualified service personnel�

Setting the Water Temperature (cont.)

Use Instructions

PRIORITY

In-Use Indicator

(Lit during operation)

In-Use Indicator

(Lit during operation)

Priority

Indicator

Priority

Indicator

Power On/Off

Indicator

Temperature

Adjustment

Buttons

Temperature

Adjustment

Buttons

WiFi

Button

Priority

Indicator

Power On/Off

Indicator

In-Use Indicator

Lit during operation

Alarm/ Error

Indicator

WiFi Signal

Indicator

Power On/

Off Button

LED Temperature

and Error Code

Display

LED Temperature

and Error Code

Display

Power On/Off

Button

(WiFi model only)(Outdoor model only)

LED DISPLAY LED WiFi DISPLAY

Power On/Off

Button

Temperature

Adjustment

Buttons

USING YOUR WATER HEATER

Start/Adjust

Setting the Water Temperature

WARNING:

Improper adjustment, alteration, service, or

maintenance can result in death, personal injury,

property damage, and/or product damage.

Maximum Temperature Adjust-

ment by the Main Display Con-

trol (UMC–117)

DANGER:

Water temperatures above 125°F (52°C) will result in

death and/or severe burns from scalding.

WARNING:

Refer to chart below and the scald potential

warnings on page 4 on this manual before making an

adjustment. Changing this setting is done at your own

risk.

Residential water heater temperatures can be

adjusted up to 140°F (60°C). DO NOT perform the

following adjustment if a setting of up to 140°F

(60°C) is not required.

To adjust the set temperature above 120°F (49°C),

please refer the following steps.

Turn on the control.

Turn off the gas and water to the water heater by

closing the shut-off valves.

Press the UP adjustment button repeatedly until

120°F (49°C) shows in the LED display. Hold the

UP button until the “120” on the display starts to

blink.

NOTICE:

LED display only shows °F.

Time/Temperature Relationship in Scalds

Water Time to Produce

Temperature a Serious Burn

120°F (49°C) More than 5 minutes

125°F (52°C) 1 1/2 to 2 minutes

130°F (54°C) About 30 seconds

135°F (57°C) About 10 seconds

140°F (60°C) Less than 5 seconds

145°F (63°C) Less than 3 seconds

150°F (66°C) About 1 1/2 seconds

155°F (68°C) About 1 second

Table courtesy of Shriners Burn Institute

Temperature Conversion Chart °F/°C

100 102 104 106 108 110 112 114 116

38 39 40 41 42 43 44 46 47

118 120 125 130 140 150 160 170 °F

48 49 52 54 60 66 71 77 °C

In-Use Indicator

(Lit during operation)

Priority

Indicator

Temperature

Adjustment

Buttons

LED

Temperature

and Error Code

Display

Power On/Off

Button and

Indicator

USING YOUR WATER HEATER

In-Use

Indicator

(Lit during

operation)

Priority

Indicator

Temperature

Adjustment

Buttons

ON/OFF

Button and

Indicator

LED Display

(Displays

water

temperature

and error

codes)

Start/Adjust

While "120" is blinking, press and hold the UP

button for 5 seconds, to set ever above 120°F,

should press and hold the UP button for 5

seconds.

Setting with Remote Control

To change the temperature settings up to 140°F

(60°C):

Turn on the remote control.

Turn off the gas and water to the water heater by

closing the shut-off valves.

Press the UP adjustment button repeatedly until

120°F (49°C) shows in the LED display. Hold the

UP button until “140” on the display starts to blink

and continue holding the UP button.

NOTICE:

LED display only shows °F.

While “140” is blinking, press the UP and DOWN

adjustment buttons at the same time. “140” will

appear without blinking

Press the UP or DOWN adjustment button to set the

desired temperature.

Turn on the gas and water to the water heater by

opening the shut-off valves.

To limit maximum water temperature setting

to 120°F (49°C):

Turn on the remote control.

Setting the Water Temperature

USING YOUR WATER HEATER

Turn off the gas and water to the water heater by

closing the shut-off valves.

Press the DOWN adjustment button repeatedly

until 100°F (38°C) or shows in the LED display.

Hold the DOWN button until the number on the

display starts to blink.

While the number is blinking, press the UP and

DOWN adjustment buttons at the same time. The

number will stop blinking.

Press the UP or DOWN adjustment button to set

the desired temperature.

Turn on the gas and water to the water heater by

opening the shut-off valves.

Start/Adjust

Setting the Water Temperature

WiFi Setup

1. Download the EcoNet app to your mobile

device and ensure that the device is

connected to the WiFi network.

2. Press and hold the WiFi button on the

display until the WiFi indicator begins

flashing.

3. Open the EcoNet application and follow the

instructions on the application to connect the

water heater.

PRIORITY

USING YOUR WATER HEATER

Piping for Space Heaters

Local codes or plumbing authority requirements may

vary from the instructions or diagrams provided in this

manual and take precedence over these instructions�

Combination Potable and Space

Heating Application

DANGERS:

When this system requires water for space heating

at elevated temperatures (above 125°F [52°C]),

a mixing or tempering valve must be installed in

the hot water supply line to the house in order to

reduce the scald hazard potential.

• Any piping or components used in the

installation of this water heater in a

combination potable and space heating

application must be suitable for use with

drinking water.

• If this water heater is installed in an

application intended to supply domestic

hot water needs and hot water for space

heating purposes, DO NOT connect the

heater to an existing heating unit or

components of a heating system that have

previously been used with a nondrinking

water system. Toxic chemicals such as those

used for boiler treatment may be present

and will contaminate the drinking water

supply causing possible health risks. Never

introduce toxic chemicals, such as those

used for boiler treatment, into this system.

• This water heater is not approved as the

dedicated space heating unit. This water

heater must be used for combination

applications with air handler only and not for

indoor heating applications.

Space Heater

Typical Combination Illustration

Tankless

Water Heater

Shut-Off

Valve

Air Separator

Air Handler

Gas

Supply

Line

Drain

Valve

Union

Relief

Valve

Cold Water Supply

Shut-Off Valve

Potable Water

Expansion Tank

(2 gallons)

Check

Valve

Cold Water

Supply

Tempering

Valve

Tempering

Water

USING YOUR WATER HEATER

Typical Recirculating

Pump Installation

Recirculating Pump

Expansion Tank

Single

Unit

Cold Water

Supply

Cold Water

to Tankless

Circulation

Pump

Hot Water to

Fixtures

Hot Water Loop

Dedicated

Return Line

3/4"

Wire to Connect to Pump

3/4"

Recirculation Pump Control

Local codes or plumbing authority requirements may vary

from the instructions or diagrams provided in this manual

and take precedence over these instructions.

Recirculation Mode

Your tankless water heater has the ability to control

an external recirculation pump which recirculates the

water in the plumbing system to provide hot water

more quickly when a faucet is opened.

Two modes are available:

• Timer recirculation (Energy Saver Mode)

• Timer recirculation (Performance Mode)

If this water heater has wifi capability, additional two

modes are available:

• On-Demand recirculation

• Schedule recirculation

Information for setting up these modes can be found

in the EcoNet App.

NOTICE:

Recirculation control is for residential application only.

Recirculation control cannot be used with an air handler

or with multiple water heater installations. The maximum

temperature setting is 140°F (60°C) in recirculation

control.

Pump Requirements

Voltage: 120V, 60Hz

In-rush current: Less than 2.5 amps

Amperage: less than 2.0 amps

WARNING:

A control board can be damaged if amperage exceeds 2.0

amps.

Pump Size

The pump should be sized for about 2.5 gpm at the

pressure drop through the tankless water heater and

the supply and return plumbing in the recirculation

loop. Contact service department listed on page

77 of this use and care manual if you need more

information.

Recommend size and length for

recirc. line

To conserve energy and minimize heat loss, insulation

for hot water lines is recommended.

*Equivalent pipe length includes hot water line, return

lines and all fittings.

Maximum allowable equivalent pipe Length*

Pipe Diameter

(Copper pipe)

¾” ½”

Pipe length 400 ft. 100 ft.

USING YOUR WATER HEATER

Recirculation Pump Control

Recirculating Pump

Installation

Disconnect all electric power to the water heater.

Remove the front cover panel on the water heater.

Install the recirculation pump on the return

line according to the pump manufacturer

installation instructions. Install a check

valve in the return line as shown in typical

recirculation pump installation if one is

not integrated into the pump. See "Typical

Recirculation Pump Installation".

* Check valve is included in Rheem

recirculation pump kit.

The wire harness for the recirculation pump is

bundled with the wire harness from the control

board. Find a blue connector with a black and a

white wire.

Connect the pump's connector to the control

board harness. If necessary, cut the blue

connector, splice the wires, and add a 4 amp fuse

to the hot wire of the pump.

Connect the ground wire from the pump to a

screw at the base of the water heater cabinet.

NOTICE:

Follow any applicable electrical code and the pump

manufacture installation instruction referring to the

Pump Electrical Connection Diagram in Step 5 of these

instructions.

Find DIP Switch 2 in the top-right portion of the

control board. The switch labeled “DIP 2” is the

bottom switch.

Control

Board

PUMP

Add

4 Amp

Fuse

Blue

connector

Cut blue connector

and splice wires.

Ground

DIP Switch

Control Board

USING YOUR WATER HEATER

Recirculating Pump

The factory setting for this switch should all be in

the OFF position (DOWN).

Change the first switch on “DIP 2” to the ON

position (UP). Performance mode is selected.

To select Energy Saver mode, change the fourth

switch on “DIP 1” to the ON position (UP).

Replace the front cover panel.

Turn on all electric power to the water heater.

Turn On the remote control. The pump and water

heater will turn on to raise recirculation loop

temperature.

Recirculation Operation

The water heater is turned ON when the

recirculation pump starts operation. The water

heater produces hot water at the setting

temperature. When the return water temperature

reaches approximately 15°F (8°F) below the setting

temperature, the water heater and the pump will

turn OFF. The cycle will restart at the approximate

time interval in the table below based on the

temperature thermistor readings.

Energy Saver Mode

The Energy Saver mode operates as follows:

• Less energy consumption due to fewer pump

cycles

• Pump cycles ON every 30 to 69 minutes

Performance Mode

The Performance mode operates as follows:

• Higher energy consumption due to more pump

cycles

• Pump cycles ON every 15 to 35 minutes

Actual pump ON intervals may vary based on the

setting temperature, insulation, and heat loss in

the system.

1 2 3 4

DIP 1DIP 2

1 2 3 4

DIP 1DIP 2

Setting Temp Typical Pump ON Intervals [Min]

[°F] Performance Energy Saver

140 15 30

135 15 30

130 15 30

125 15 30

120 16 31

118 17 33

116 18 35

114 19 38

112 20 40

110 22 44

108 24 47

106 26 51

104 28 56

102 31 62

100 35 69

Recirculation Pump Control

USING YOUR WATER HEATER

1 2 3 4

DIP

Switch

"MAX"

button

"ADJUST"

button

"MIN"

button

DIP

Switch

Recirculation Pump Control

Recirculation Operation –

On-Demand mode-

If the On-Demand mode is used, the water heater

needs wifi capability.

If the water heater is NOT a WiFi model, you

cannot use the On-Demand mode.

To enter On Demand Mode

• Ensure Switch 1 on DIP 2 and switch 4 on DIP

1 are off.

• In less than one minute.

• Turn Switch 1 on DIP 2 on-off-on-off.

• Press the Adjust Button

• The LED will flash one time

The unit is now in on demand mode.

NOTE:

If the water heater does not have WiFi

capability, the built-in display needs to

be replaced to the display including wifi

capability.

Rheem offers the display including wifi capability.

See the Parts and Accessories catalog for more

information.

When set to On-Demand mode, the recirculation

pump is ON for 5 minutes when the water heater

receive the signal form the application on smart

phone.

Mode setting – On-Demand mode-

Please refer to the instruction of WiFi display

section.

Recirculation Operation – Schedule

mode-

If the Schedule mode is used, the water heater

needs wifi capability.

If the water heater is NOT a WiFi model, you

cannot use the Schedule mode.

NOTE:

If the water heater does not have WiFi

capability, the built-in display needs to

be replaced to the display including wifi

capability.

Rheem offers the display including WiFi capability.

See the Parts and Accessories catalog for more

information.

When set to Schedule mode, the recirculation

pump is ON according the setting schedule on the

application on smart phone

Mode setting – Timer mode-

To use Schedule mode, the water heater should be

set to Performance mode or Timer mode.

USING YOUR WATER HEATER

Start/Adjust

Water Saving Control

Water saving control is optional and is inactive

as default. To activate this control, appropriate

procedures must be followed.

Water saving control can reduce waste water at

initiation of hot water demand by reducing flow

until outlet hot water reaches set temperature.

It is recommended to turn ON this control if the

water heater is installed in a drought area or

anywhere water conservation is needed.

Follow the steps below to turn ON the water

saving control.

Turn off the gas and water to the water heater by

closing the shut-off valves.

Remove the front cover panel on the water heater.

Find DIP Switch 1 located in the top-middle

portion at the control board. The switch labeled

“DIP 1” is the right-most set of switches. If any

DIP switches are on for venting/altitude settings,

switch them to the OFF position.

Change the third switch on “DIP 1” to the ON

position (UP).

Press “Max button“or “Min button” on the control

board to set the activation of this control.

LED display on the built-in control shows “oF”.

Within 30 seconds of turning the third switch,

press the "Max button" or "Min button" on the

control board to set the activation of this control.

Within the next 30 seconds, the display/control

board will show the water saving control setting.

The LED identifications are below.

1 2 3 4

DIP 1

DIP 2

1 2 3 4

DIP

Switch

"MAX"

button

"ADJUST"

button

"MIN"

button

DIP

Switch

USING YOUR WATER HEATER

WATER SAVING

CONTROL

CONTROL BOARD

LED (RED)

DISPLAY LED

ON Once Flashing ON

OFF Twice Flashing OF

DIP Switch

Control Board

Start/Adjust

Replace the front cover panel and turn the remote

ON. Turn the remote on before turning the water

supply on.

Turn on the gas and water to the water heater by

opening the shut-off valves.

USING YOUR WATER HEATER

Water Saving Control

1 2 3 4

After setting the activation of this control, change

the third switch on “DIP 1” to the OFF position

(DOWN). Be sure to reapply any venting/altitude

DIP switch settings.

CARING FOR YOUR WATER HEATER

Water Heater Inspections

Venting System (Direct Vent Only)

The venting system should be inspected annually by

a qualified service technician to ensure all of the vent

sections are secure and airtight�

WARNING:

DO NOT operate the water heater if the vent

system shows signs of leaking exhaust.

Leaking exhaust could lead to death, personal

injury, and/or product failure.

Check the air intake and vent outlet for blockage and/or

debris�

Condensate Trap (Direct Vent Only)

CAUTION:

DO NOT operate without the condensate trap

connected to the vent and routed to the proper

drain. It could cause the system to malfunction

or fail.

On a regular basis, inspect the condensate trap to ensure

there is enough water in the trap and the condensate is

draining properly�

Ensure that condensate is disposed of per local codes

and regulations�

Care Instructions

Outdoor

models

Burner

It is recommended that the burner be inspected annually

by a qualified service technician�

DANGER:

Shock Hazard – Removing the front cover panel

exposes you to live electricity. Electric shock will

cause death or serious personal injury.

Remove 4 screws and the unit cover panel�

Turn on a hot water faucet�

While the water heater is operating, inspect the main

burner flames through the burner sight glass� The flames

should be blue when the main burner is firing�

NOTICE:

If the flames are not blue or you observe unusual

burner operation, shut off the water heater and contact

a qualified service technician.

Turn off the hot water faucet and reinstall the unit cover

panel�

CARING FOR YOUR WATER HEATER

Water Heater Inspections

Care Instructions

Burner Sight

Glass

Care Instructions

CARING FOR YOUR WATER HEATER

Care and Cleaning

DANGER:

Shock Hazard – Make certain power to the water heater

is OFF before removing protective cover for any reason.

Electric shock will cause death or serious personal

injury.

WARNING:

Combustible materials, such as clothing, cleaning

materials, or flammable liquids, must not be placed

against or next to the water heater. Fire or explosion

can occur causing death, personal injury, and/or

product damage.

All care and cleaning to and around the water heater

should only be performed with the water heater turned

off and the electrical power supply disconnected�

Vacuum around the water heater to remove any dust, dirt,

and/or lint buildup�

Clean the water heater and the remote control with a

damp soft cloth and mild detergent� Gently wipe and

completely dry all surfaces�

Check the air intake and vent outlet for blockage and/or

debris�

NOTICE:

The air intake requires a minimum of 12 in. (30 cm)

of clearance between the air intake opening and any

obstruction.

Clean the water filter monthly, as described below and on

the next page�

Water Filter Cleaning

Turn off the water heater and disconnect the electrical

power supply�

Turn off the water supply to the water heater�

Drain the water heater� See "Draining the Water Heater"

Section�

Outdoor

models

Cold Water Supply

Shut-Off Valve

Drain Valve

CAUTION:

DO NOT tap or force the filter during removal. This

can deform and/or damage the filter.

Unscrew the water filter from the base of the cold water

inlet line and carefully slide it out

of the line�

Clean the water filter under running water� To remove

severe sediment and dirt, use a soft brush�

CAUTION:

DO NOT overtighten the water filter. Overtightening

can deform and/or damage the filter.

Replace the filter in the cold water inlet line and tighten

until it is snug�

Turn on the water supply, reconnect the electrical supply,

and turn on the water heater�

CARING FOR YOUR WATER HEATER

Care Instructions

Care and Cleaning

Care Instructions

CARING FOR YOUR WATER HEATER

Preventive Maintenance

WARNING:

Failure to perform routine preventive maintenance

can prevent the water heater from operating

properly. Improper operation can cause carbon

monoxide dangers, excessive water temperatures,

and other potentially hazardous conditions resulting

in death, personal injury, and/or product damage.

Properly maintaining your water heater will ensure

dependable, trouble-free service�

User Preventive Maintenance

Establish and follow a routine preventive maintenance

program� The following suggested items should be

included in your program�

Monthly check and clean the water filter� See “Water Filter

Cleaning” on this Use and Care Manual�

WARNING:

Hot water is released during manual operation of

the relief valve. Make sure all people and animals

are clear from the area before performing this

check to prevent death, personal injury, and/or

property damage from hot drain water.

Annually check the operation of the pressure-relief valve�

Lifting the lever handle on the pressure-relief valve opens

the valve to flush hot water through the discharge line to

the drain� After several gallons have drained, release the

lever handle to close the valve and stop draining�

NOTICE:

If the pressure relief valve on the hot water heater

discharges periodically, this may indicate a problem

in the water system. Contact the water supplier or a

plumbing contractor to correct the problem. DO NOT

plug the relief valve outlet.

• Inspect and keep the area around the water

heater clear and free of flammable materials,

such as gasoline and other flammable vapors

and liquids.

• Visually inspect the water heater for damage

and/or denting. If present, contact a service

personnel to verify proper operation.

• Check for abnormal sound during normal

operation (e.g., hissing or banging noises).

Contact a qualified service technician or

plumbing contractor.

• Check all gas and water pipes for leaks. See

"Leak Testing" on this Use and Care Manual.

NOTICE:

– DO NOT operate the water heater if you feel

something is wrong with the unit.

– DO NOT allow children to operate or handle the unit.

• After inspections, maintenance, and/or cleaning, ensure

proper operation by turning on a hot water faucet�

Professional Preventive Maintenance

It is recommended that a periodic inspection of the water

heater burner, relief valve, air intake filter, water filter, and

venting system be made by a qualified service technician�

WARNING:

Certain water conditions can damage the water

heater and may cause defects, malfunctions or

failures of the water heater that are not covered by

the limited warranty. See "Water Quality" on this

Use and Care Manual.

Relief Valve

Draining the Water Heater

WARNING:

Failure to follow these draining instructions can

cause serious personal injury from scalding and/or

product damage.

Turn off the water heater by pressing the POWER

ON/OFF button on the control panel.

Close the gas shut-off valve(s).

At least 10 seconds after Step 1, unplug the water

heater or disconnect the power supply at the

circuit breaker box.

Open all hot water faucets. Run the water until it is

COLD; then shut off the faucet.

Close the water shut-off valve.

Using a suitable container to catch the water,

remove the water filter from the base of the cold

water inlet line.

Connect a garden hose to the drain valve in the

hot water outlet line and place the other end in a

suitable drain. Open the drain valve until all the

water has drained from the water heater. Leave

water heater as is until placed back in service.

CARING FOR YOUR WATER HEATER

Care Instructions

Cold Water Supply

Shut-Off Valve

CAUTION:

Even when drained properly, a small amount of

water will remain in the water heater. In cold

weather conditions, this water can freeze. If this

happens, allow the defrost protection on the water

heater at least 60 minutes to melt the frozen water.

The water heater will not work properly until this

water is thawed.

To put the water heater back in service:

Disconnect drain hose. Make sure the drain valve

is closed.

Reinstall the water filter in the base of the cold

water inlet line.

Open the water shut-off valve.

Open all hot water faucets and let run until all air

has been purged from the lines.

Plug in the power cord or reconnect the power

supply at the circuit breaker box.

Open the gas shut-off valve(s).

Press the POWER ON/OFF button on the control

panel to restart the unit.

Care Instructions

CARING FOR YOUR WATER HEATER

Draining the Water Heater (cont.)

Preferred Drain Method

Isolator valve kits may be purchased from the

manufacturer, distributor, or place of purchase� The kits

include two full port isolation valves to be used in the

inlet and outlet water lines� It is highly recommended

to install isolator valve kits because these kits provide

a means for full diagnostic testing and ease of system

flushing�

Freeze Protection

WARNING:

Failure to drain the water heater can cause serious

personal injury from scalding and/or product

damage.

Whenever the water heater may be exposed to freezing

conditions, precautions should be taken to help prevent

the water heater from freezing�

Freezing conditions come from the ventilation system

on direct-vent models and from exposure to cold air on

outdoor models�

All of these water heaters are equipped with a freeze

protection electric heater� This heater helps prevent

freezing inside the water heater down to outside

temperature of -30°F (-35°C) on indoor installations

and approximately -4°F (-20°F) on outdoor installations�

These temperatures are all based on temperatures

without wind�

The heater only protects the internal components of the

water heater�

NOTICE:

Unplugging or disconnecting the power supply to

the water heater will also disconnect the power to

the heater.

External piping and valves require additional freeze

protection� One method is to wrap insulation around the

piping and valves�

Another method is to turn on a hot water faucet and leave

a small amount of water running at a faucet� This will

help protect the water heater, piping, and valves from

freezing�

If power outages occur during freezing conditions, it is

recommended to completely drain the water heater to

help prevent damage to the unit� See "Draining the Water

Heater�" Once power is restored, refill the water heater

and check for frozen or leaking components�

Components or heat exchangers damaged by freezing

conditions is not covered under manufacturer's warranty�

Running Water Freeze Protection

Turn off the water heater by pressing the POWER ON/OFF

button on the control panel�

Close the gas shut-off valve(s)�

Open a hot water faucet slightly until the water stream is

approximately 1/8 in� (0�3 cm)� Be sure to check the flow

periodically�

CARING FOR YOUR WATER HEATER

Care Instructions

Cold Water Supply

Shut-Off Valve

Hot Water

Service Valve

Relief Valve

Water Outlet

Drain

Water Inlet

Care Instructions

Vacation and Extended Shutdown

WARNING:

Failure to drain the water heater can cause serious

personal injury from scalding and/or product

damage.

If the water heater is to remain idle for an extended

period of time, the power and water to the heater should

be turned off�

The water heater and piping should be drained if they

might be subjected to freezing temperatures� When

drained, some water may remain in the unit� See “Freeze

Protection” section on this Use and Care Manual�

After an extended shutdown, the water heater’s operation

and controls should be checked by a qualified service

technician�

Troubleshooting Chart

The information in the following troubleshooting chart

may help you diagnose and/or fix a problem you may be

experiencing� Please review this chart before calling for

service assistance�

DANGER:

Shock Hazard – Make certain power to the water

heater is OFF before removing protective cover

for any reason. Electric shock will cause death or

serious personal injury.

WARNING:

For Your Safety, DO NOT attempt repair of electrical

wiring, gas piping, remote control, burners, vent

connectors, or other safety devices. Refer repairs to

a qualified service technician.

Problem Possible Cause Solution

Not enough or no hot water�

1� Unit is not ON� 1� Turn on the unit by pressing the POWER

ON/OFF button�

2� Water shut-off valve is not completely

opened�

2� Check shut-off valve and open completely�

3� Hot water faucet is not completely opened� 3� Open hot water faucet completely� (The

main burner goes off when incoming water

volume is inadequate�)

4� Water piping is frozen� 4� Allow piping to thaw�

5� Electrical power is disconnected or water

supply is shut off�

5a� Plug in the power cord or reconnect

the power supply at the circuit breaker box�

5b� Completely open the water supply valve�

(Inadequate water volume will cause the

main burner to turn off�)

6� The temperature may be set too low� 6� Increase the temperature setting�

7� Mixing valve malfunctions (if

applicable)�

7� Check and replace the mixing valve�

8� Error code displayed on the remote control� 8� See “Service Error Code Chart” on

page 77� If required, contact a

qualiﬁed service technician�

9� Not enough water demand� 9� Increase the hot water ﬂow at the

faucet�

10� Water ﬁlter is clogged or dirty� 10� Clean the water ﬁlter� (See pages 68 and

69�)

11� Fixture aerator is clogged or dirty� 11� Clean the aerator�

12� Scale buildup in the heat exchanger� 12� Check for error code� If required,

contact a qualiﬁed service technician�

13� Hot and cold water lines reversed� 13� Reverse the water lines�

3 4 9

CARING FOR YOUR WATER HEATER

Problem Possible Cause Solution

Water not hot enough�

1� The temperature may be set too low� 1� Increase the temperature setting at

the remote control�

2� The gas valve is not completely opened� 2� Check and completely open the gas valve�

3� Gas supply pressure is low� 3� Contact your gas utility company or gas

contractor to verify the gas meter and gas

piping size�

4� Bleed-over in one of the hot water

ﬁxtures�

4� Contact a dealer or a qualiﬁed service

technician�

Water too hot�

1� Temperature is set too high� 1� Decrease the temperature setting at

the remote control�

2� Water shut-off valve is not completely

opened�

2� Check and completely open the water shut-

off valve�

3� Small amount of water has been heated� 3� Increase the hot water ﬂow at the

faucet to allow more water to ﬂow

through the water heater�

Fan continues to rotate after the hot water

faucet is closed�

The post-purge cycle clears ﬂue gases� Normal operation�

Troubleshooting Chart (cont.)

Care Instructions

CARING FOR YOUR WATER HEATER

Care Instructions

CARING FOR YOUR WATER HEATER

Service Error Code Chart

Your water heater has an electronic diagnostic

system built into it. When the water heater finds

a problem, it displays an error code in the LED

display on the remote control. The following chart

lists the error codes along with their possible

problem and solution. Using this chart may help

you diagnose and/or fix a problem you may be

experiencing. Please refer to this chart before

calling for service assistance.

DANGER:

Shock Hazard – Make certain power to the water

heater is OFF before removing protective cover

for any reason. Electric shock will cause death or

serious personal injury.

WARNING:

For Your Safety, DO NOT attempt repair of electrical

wiring, gas piping, remote control, burners, vent

connectors, or other safety devices. Refer repairs to

a qualified service technician.

When an error code is displayed:

Turn off all the hot water faucets.

Turn off the water heater by pressing the POWER

ON/OFF button on the remote control.

Wait about 5 minutes; then restart the water heater

by pressing the POWER ON/OFF button.

Turn on a hot water faucet and recheck the remote

control display.

If the error code remains in the display:

1� Turn off the hot water faucet�

2� Turn off the water heater�

3� Unplug the water heater from power, wait about 30

seconds and plug back in�

4� Follow the error code chart information�

5� Restart the water heater, turn on a hot water faucet,

and recheck the remote control display�

If the error code is still shown:

1� Turn off the hot water faucet�

2� Turn off the water heater�

3� Make note of the displayed error code and call for

service assistance� See “Call for Assistance” section

on this Use and Care Manual�

NOTICE:

If the displayed error code is not listed in the chart,

immediately turn off the water heater and call for

service assistance.

CARING FOR YOUR WATER HEATER

Service Error Code Chart (cont.)

Call for Assistance

IF YOU NEED SERVICE

1. All questions, adjustments, repairs, and/or

routine maintenance should be directed to your

installer, plumbing contractor, or licensed service

agent. If your contacts have moved or are not

available, please refer to the telephone directory,

commercial listings, or local utility company for

qualified service assistance.

2. If your problem has not been solved to your

satisfaction, contact the Rheem National Service

Department at the following address:

Rheem

National Service Department

800 Interstate Park Drive

Suite 700

Montgomery, AL 36109

Phone: 1-866-720-2076

When contacting the manufacturer, the following

information will be requested:

A. Model and serial number. (See page 8 or the

ratings plate on the side of the water heater.)

B. Address where the water heater is located.

C. Name and address of installation contractors

(page 8) and all qualified service companies

that have worked on the water heater.

D. Original installation date. (See page 8.)

E. Dates any service or preventive maintenance

was performed.

F. Details of the persisting problem.

G. List of businesses that have tried to fix this

problem, along with dates of service.

Error Code Possible Cause Solution

Water heater has buildup of lime deposits� Contact a dealer or qualiﬁed service technician�

The gas shut-off valve is not fully opened� Check shut-off valve and open completely�

Gas service has been interrupted� Contact your gas utility company�

LP gas is running low (LP models only)� Reﬁll or replace your LP gas container�

Water heater is overheating� Contact a dealer or qualiﬁed service technician�

Faulty inlet thermistor� Contact a dealer or qualiﬁed service technician�

Faulty outlet thermistor� Contact a dealer or qualiﬁed service technician�

Faulty blower motor� Contact a dealer or qualiﬁed service technician�

Faulty bypass motor� Contact a dealer or qualiﬁed service technician�

Not enough water ﬂow to operate the unit� Increase the water ﬂow from the ﬁxtures�

Reminder of ﬂushing the heat exchanger and/or

replacing the water treatment ﬁlter�

Contact a dealer or qualiﬁed service technician�

90 or 99

Air intake or vent exhaust opening may be

blocked�

Remove any blockage� (Air intake requires 12 in�

[30 cm] of clearance�)

The vent pipes on the vent termination may not

be connected properly�

Contact a dealer or qualiﬁed service technician�

Care Instructions

Maintenance Notice

Maintenance notice is an optional control and is

inactive as default. Maintenance notice reminds

users of water heater maintenance activities such

as flushing the heat exchanger or replacing the

water treatment filter (if applicable) in order to

maximize the life of your tankless water heater.

Contact technical service department listed on

page 77 of this use and care manual if you are not

familiar with these maintenance activities.

Turn off the remote control.

Turn off the gas and water to the water heater by

closing the shut-off valves.

Press and hold the “▲“and “▼”button until “1Y ”

is displayed on the built-in display.

Press the “▲“or “▼”button until “8A ” is displayed.

And, press and hold the power button on the

build-in display for 1 second.

The current setting time is displayed on the

display.

(Factory setting is “OFF”)

Press the “▲“or “▼”button to choose “50”, “75”,

“100” or “OF”.

Turn on the gas and water to the water heater by

opening the shut off valves.

When tankless water heater has a certain number

of hours of combustion, error code “88” is shown

on the display. It is highly recommended to

perform water heater maintenance activities such

as flushing the heat exchanger and/or replacing

the water treatment filter (if applicable).

Displayed Maintenance Notice Hour

50 500 hours

75 750 hours

100 1,000 hours

OF OFF

Care Instructions

CARING FOR YOUR WATER HEATER

Maintenance Notice

Care Instructions

CARING FOR YOUR WATER HEATER

ERROR CODE 88 CLEARING

IMPORTANT

It is highly recommended to perform water heater maintenance activities such as flushing the heat exchanger and/or

replacing the water treatment filter (if applicable) before clearing this error code.

After these maintenance activities are completed, follow the steps below to clear error code "88".

Turn on the remote control.

Turn off the gas and water to the water heater by

closing the shut-off valves.

Press the DOWN adjustment button repeatedly

until the lowest setting temperature shows in the

LED display.

Press and hold the DOWN and UP adjustment

button for 5 to 10 seconds.

Turn on the gas and water to the water heater by

opening the shut off valves.

If error code "88" is still shown, repeat steps 1

through 5 above.

IF YOU NEED SERVICE

Parts Ordering

WARNING:

For your safety, DO NOT attempt to disassemble,

repair, or replace any portion of this unit. Refer all

repairs, service, and/or adjustments to qualified

service personnel.

Address all parts orders to the distributor or store

where the water heater was purchased. All parts

orders should include:

1. The model and serial number of the water

heater from the rating plate.

2. Specify the gas type (natural or LP) as marked

on the rating plate.

3. Parts description (as shown below) and number

of parts desired.

Direct-Vent Gas Components

Ref # Description

1 Front Cover Final Assembly

2 Front Cover Screw

3 Cabinet Bracket

4 Power Cord

5 Display/Controller

6 Mounting Bracket Kit

7 Blower Motor

8 HEX Thermistor

9 Hot Water Connection

10 Drain Valve

11 Hot Water Thermistor

Ref # Description

12 Water Control Valve

13 Inlet Water Connection

14 Water Filter

15 Manifold/Gas Valve Kit

16 Manifold Screw

17 Gas Connection

18 Inlet Gas Screw

19 Control Board

20 Program Chip

21 Igniter/Flame Rod Kit

22 Igniter Module

Parts

Ref # Description

1 Front Cover Final Assembly

2 Front Cover Screw

3 Cabinet Bracket

4 Power Cord

5 Display/Controller

6 Blower Motor

7 HEX Thermistor

8 Hot Water Connection

9 Drain Valve

10 Hot Water Thermistor

11 Water Control Valve

Ref # Description

12 Inlet Water Connection

13 Water Filter

14 Manifold/Gas Valve Kit

15 Manifold Screw

16 Gas Connection

17 Inlet Gas Screw

18 Control Board

19 Program Chip

20 Igniter/Flame Rod Kit

21 Igniter Module

Parts Ordering

Parts

Outdoor Gas Components

IF YOU NEED SERVICE

LIMITED WARRANTY

For the RHEEM®, RUUD®, Richmond®, Paloma®, and EcoSmart® Residential Tankless Gas Water Heaters.

GENERAL

This Limited Warranty is only available to the original owner of the water heater at the original installation location. This Limited Warranty is

not transferable.

Rheem Sales Company, Inc. (Rheem) warrants this tankless gas water heater, and its component parts, to be free from defects in materials

and manufacture, under normal use and service, for the Applicable Warranty Period specified below. At its option, Rheem will repair or

replace the defective water heater, or defective component part(s), in accordance with the terms of this Limited Warranty, if it fails in normal

use and service during the Applicable Warranty Period. The replacement water heater must be manufactured by Rheem under one of the

covered brand names. The replacement component part(s) must be Rheem authorized component part(s). The replacement unit will be

warranted only for the unexpired portion of the original unit’s Applicable Warranty Period.

Rheem strongly recommends that this tankless water heater be installed by a contractor that is licensed, state qualified and trained on

Rheem's tankless products because improper installation may invalidate warranty coverage.

EFFECTIVE DATE

The Effective Date of warranty coverage (or the beginning of the Applicable Warranty Periods) is the date of the original installation of the

water heater, if properly documented. Otherwise, it is the date of manufacture of the water heater plus ninety (90) days.

APPLICABLE WARRANTY PERIODS: The Applicable Warranty Period depends on the type of installation, as described below:

Residential: a Single Family Dwelling

Twelve (12) years from the Effective Date for the heat exchanger, five (5) years from the Effective Date for the component parts, and one (1)

year from the Effective Date for certain labor as described under the heading, LABOR, SHIPPING AND PROCESSING COST.

Residential: a Single Family Dwelling used with Hydronic Force Air Heating

Ten (10) years from the Effective Date for the heat exchanger, five (5) years from the Effective Date for the component parts, and one (1) year

from the Effective Date for certain labor as described under the heading, LABOR, SHIPPING AND PROCESSING COST. Provided that a

Rheem manufactured/ Rheem approved potable water hydronic air handler is installed with the system.

Residential: a Single Family Dwelling with recirculation, controlled loop

Twelve (12) years from the Effective Date for the heat exchanger, five (5) years from the Effective Date for the component parts, and one (1)

year from the Effective Date for certain labor as described under the heading, LABOR, SHIPPING AND PROCESSING COST. Provided that

the recirculation system is an on demand type system or the pump is controlled with a temperature sensor (aquastat) and timer.

Residential: a Single Family Dwelling with recirculation, uncontrolled loop

Three (3) years from the Effective Date for the heat exchanger, three (3) years from the Effective Date for the component parts, and one (1)

year from the Effective Date for certain labor as described under the heading, LABOR, SHIPPING AND PROCESSING COST, if the water

heater is installed in a system in which the water is re-circulated using a continuously operating pump.

Commercial: any installation that is not a single family dwelling

Five (5) years from the Effective Date for the heat exchanger, five (5) years from the Effective Date for the component parts, and one (1) year

from the Effective Date for certain labor as described under the heading, LABOR, SHIPPING AND PROCESSING COST.

Commercial: with recirculation, controlled loop

Five (5) years from the Effective Date for the heat exchanger, five (5) years from the Effective Date for the component parts, and one (1) year

from the Effective Date for certain labor as described under the heading, LABOR, SHIPPING AND PROCESSING COST. Provided that the

recirculation system is an on demand type system or the pump is controlled with a temperature sensor (aquastat) and timer.

Commercial: with recirculation, uncontrolled loop

Three (3) years from the Effective Date for the heat exchanger, three (3) years from the Effective Date for the component parts, and one (1)

year from the Effective Date for certain labor as described under the heading, LABOR, SHIPPING AND PROCESSING COST, if the water

heater is installed in a system in which the water is re-circulated using a continuously operating pump.

WARRANTY EXCLUSIONS

This Limited Warranty will not cover:

a) Damages, malfunctions or failures resulting from:

1. Installation of the water heater in environments in which water quality levels do not fall within the ranges listed in the table above:

b) Operating the water heater in a corrosive or contaminated atmosphere, including without limitation damages, malfunctions or failures caused by lime, mineral

build-up, or scale.

c) Service trips to your business to teach you how to install, use, or maintain this water heater or to bring the water heater installation into compliance with local

building codes and regulations or manufacturer’s installation requirements.

d) Water heater unit installed for use in: spa or pool heating; a recreational vehicle; a boat or any other watercraft.

e) Water heater unit installed in any circulating system in which the temperature of the incoming water to the water heater is in excess of 140° f.

f) Water heater unit that is installed in any installation supplying radiant heat, such as in floor, baseboard, radiators, snow melt or closed loop systems, or any

system using glycol or non-potable water.

g) Damages, malfunctions or failures resulting from failure to install the water heater in accordance with applicable building codes/ordinances or good plumbing

and electrical trade practices.

h) Damages, malfunctions or failures resulting from improper installation or failure to operate and maintain the unit in accordance with the manufacturer’s

instructions.

i) Performance problems caused by improper sizing of the water heater or the gas supply line, the venting connection, combustion air openings, electric

service voltage, wiring, or fusing.

j) Damages, malfunctions or failures caused by improper conversion from natural gas to LP gas or LP gas to natural gas fuel source.

k) Damages, malfunctions or failures caused by operating the water heater with any parts removed or with modified, altered, or unapproved parts installed.

l) Damages, malfunctions or failures caused by abuse, accident, fire, flood, freeze, lightning, acts of God and the like.

m) Heat exchanger failures (leaks) caused by operating the water heater in a corrosive or contaminated atmosphere or damages, malfunctions or failures caused

by lime, mineral build-up, or scale.

n) Damages, malfunctions or failures caused by operating the unit at water temperatures exceeding the maximum setting of the operating, or high limit, control.

o) Heat exchanger failures caused by operating the water heater when it is not supplied with potable water, free to circulate at all times.

p) Damages, malfunctions or failures caused by subjecting the heat exchanger to pressures, or firing rates, greater than those shown on the rating label.

q) Damages, malfunctions or failures resulting from the use of any attachment, including any energy saving device, not authorized by Rheem.

r) Units installed outside the fifty states (and the District of Columbia) of the United States of America and Canada.

s) Units removed from the original installation location and reinstalled elsewhere.

t) Units that have had their rating labels altered, tampered with, or removed. A water heater should not be operated if the rating label is removed.

Chart for Recommended Water Quality Levels

pH (Total Dissolved Solids) TDS Free Carbon Dioxide (CO

) Total Hardness Aluminum Chlorides Copper Iron Manganese Zinc

6�5–8�5 Up to 500 mg/L Up to 15 mg/L Up to 200 mg/L 0�05 to 0�2 mg/L Up to 250 mg/L Up to 1�0 mg/L Up to 0�3 mg/L Up to 0�05 mg/L Up to 5 mg/L

Cited reference: National Secondary Drinking Water Regulations

WARRANTY

LABOR, SHIPPING, AND PROCESSING COSTS

For one (1) year after the Effective Date, Rheem will cover reasonable labor costs necessary to repair or replace a tankless water heater or component part

that Rheem determines to be defective and covered by this Limited Warranty. The warranty service must be performed by a contractor that is licensed,

state qualified, and trained to install and service Rheem's tankless water heaters. This Limited Warranty does not cover any labor expenses for general

service, inspection, reinstallation, permits, removal and disposal of the failed water heater or defective component part(s), or updating the installation to meet

manufacture or local code requirements. All such expenses are your responsibility.

Rheem will pay the transportation costs for an “in-warranty” replacement water heater, or “in-warranty” replacement component part(s), to a convenient delivery

point (selected by Rheem) near the place the original water heater, or original component part(s), is located: such as a local water heater distributor. You must

pay any local freight charges, including the cost of returning the failed water heater, or defective component part(s) to a convenient shipping location (selected

by Rheem): such as a local Rheem distributor.

Rheem does not authorize, recommend, or receive any benefit from any claims processing or similar fees charged by others to process warranty claims for any

water heater or component part(s). Rheem will not reimburse any party for these, or any other, fees not specifically covered in this Limited Warranty document.

HOW TO OBTAIN WARRANTY CLAIM ASSISTANCE

Any claim for warranty assistance must be made promptly. First, determine if your water heater is “in-warranty” (that is, within the Applicable Warranty Period).

You can determine your unit’s warranty status by adding its Applicable Warranty Period to its date of installation. However, if you do not have documentary

proof of your water heater’s date of installation, your unit’s warranty status will be based on its date of manufacture as determined from the serial number. Add

the Applicable Warranty Period plus ninety (90) days to the date of manufacture to determine whether the water heater is still covered by this Limited Warranty.

You may also determine your unit’s warranty status by obtaining the complete model number, complete serial number, and date of installation of your water

heater and then accessing the “Warranty Verification” information on Rheem Water Heaters' internet website (www.rheem.com) or contacting Rheem's Claims

Department (telephone (800) 621-5622) during normal business hours (in the Central Time Zone) to determine if the Applicable Warranty Period has expired.

If your water heater is “in-warranty”, contact the plumber, or mechanical contractor, that installed it for assistance with the warranty repairs, or replacement,

required. Rheem Water Heaters' Technical Service personnel are available to assist you (by telephone at (866) 720-2076) in obtaining “in-warranty” service or

to answer your questions about the operation or repair of your water heater during normal business hours (in the Central Time Zone). Be prepared to provide

the plumber, mechanical contractor, or Rheem Technical Service person you call with the complete model number, the complete serial number, and the date of

installation of your water heater in addition to an explanation of your water heater problem.

If an exact replacement is not available, Rheem will provide you with the current model of your water heater, or component part(s), or a replacement unit with

comparable operating features. If government regulations or industry certification or similar standards require the replacement water heater, or replacement

component part(s), to have features not found in the defective water heater, or the defective component part(s), you will be charged for the difference in price

represented by those required features. If you pay the price difference for those required features and/or to upgrade the size and/or other features available on a

replacement new water heater, you will also receive a complete new Limited Warranty (with the full Applicable Warranty Period) for the replacement new water

heater.

Rheem reserves the right to inspect, or require the return of, the failed water heater or the defective component part(s). Each “in-warranty” failure water heater

must be made available to Rheem (with the rating label and all the component parts intact) in exchange for the replacement water heater. Each defective

“in-warranty” component part to be replaced must be returned to Rheem in exchange for the replacement component part.

Warranty compensation is subject to validation of “in-warranty” coverage by Rheem Claims Department personnel.

• To obtain warranty compensation for an “in-warranty” water heater failure, you must provide Rheem with the failed water heater (with the rating label and all

the component parts intact) the complete model number and the complete serial number of the Rheem or Ruud water heater that replaced the failed unit; and

the date the original water heater failed. You may also be required to provide documentary proof of the failed water heaters date of installation to establish its

“in-warranty” status.

• To receive warranty compensation for an “in-warranty” defective component part, you must provide Rheem with: the defective component part; the complete

model number and the complete serial number of the Rheem or Ruud water heater from which the defective component part was removed; and the date

the defective component part failed. You may also be required to provide documentary proof of the date of installation of the Rheem or Ruud water heater

from which the defective part was removed – or the date of purchase of the part (If it was purchased separately) – to establish the “in-warranty” status of the

defective component part.

• If Rheem determines that the water heater or component part returned to Rheem is free of defects in material and manufacture and/or that it was damaged

by improper installation or other cause not covered by this Limited Warranty, the warranty claim for the product, component part and/or labor maybe denied.

Warranty claim documentation should be mailed promptly to Rheem Water Heaters, Claims Department, 1241 Carwood Court, Montgomery, Alabama 36117,

or in Canada, 125 Edgeware Rd. Unit 1, Brampton, ON, Canada L6Y 0P5

EXCLUSIVE WARRANTY – LIMITATION OF LIABILITY

THIS LIMITED WARRANTY IS THE SOLE AND EXCLUSIVE WARRANTY PROVIDED IN CONNECTION WITH THIS RHEEM®,

RUUD®, RICHMOND®, PALOMA® AND ECOSMART® RESIDENTIAL TANKLESS GAS WATER HEATER UNIT (THE “WATER

HEATER”). No one is authorized to make any other warranties on behalf of Rheem. ANY IMPLIED WARRANTIES, INCLUDING

MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE, SHALL NOT EXTEND BEYOND THE APPLICABLE WARRANTY

PERIODS, SPECIFIED PREVIOUSLY. RHEEM’S SOLE LIABILITY, WITH RESPECT TO ANY DEFECT, SHALL BE AS SET FORTH IN

THIS LIMITED WARRANTY, AND ANY CLAIMS FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGE FROM

WATER LEAKAGE) ARE EXCLUDED. Some states do not allow limitations on how long an implied warranty lasts, or for the exclusion of

incidental or consequential damages, so the above limitations or exclusions may not apply to you.

This Limited Warranty gives you specific legal rights, and you may also have other rights, which vary from state to state.

DO NOT RETURN THIS WATER HEATER OR PART TO RHEEM WITHOUT A RETURN AUTHORIZATION.

This document is for reference only and does not replace the original warranty document found in the back of the Use and Care

manual provided with the tankless water heater.

DO NOT RETURN THIS DOCUMENT TO RHEEM.

KEEP IT WITH YOUR WATER HEATER OR BUSINESS RECORDS.

Name of Owner:

Owner’s Address:

Name of Plumber/

Mechanical Contractor – Installer:

Address of Plumber/

Mechanical Contractor – Installer :

Telephone Number of Plumber/

Mechanical Contractor – Installer:

Date of Water Heater Installation:

Model Number of Your Water Heater:

Serial Number of Your Water Heater:

NOTES

Rheem ECO200DVELP-3 Smart Indoor Liquid Propane Tankless Water Heater

Product's Documents

User Manual

Specifications

Rheem ECO200DVELP-3 Questions and Answers