AO Smith EETU-50 100 ProLine® Grid-Capable 50-Gallon User Manual

Residential Electronic Thermostat

Electric Water Heater

Installa on Instruc ons and

Use & Care Guide

Keep this manual in the pocket on heater for future reference whenever maintenance, adjustment or service is required.

Retain your original receipt as proof of purchase.

Table of Contents ................................... Page

Important Safety Informa on ............................................... 3

Ge ng Started ....................................................................... 6

Installa on .............................................................................. 7

Opera on ............................................................................. 16

Troubleshoo ng ................................................................... 20

Maintenance ........................................................................ 25

Diagrams............................................................................... 29

Repair Parts .......................................................................... 30

LOW LEAD

NTENT

GRID

ENABLED

VACATION

STANDARD

ENERGY

SMART

°F/°C

°C

ENTER

100354544_2000609845_REV. A

January 2022

DO NOT RETURN THIS UNIT TO THE STORE

Read this manual and the labels on the water heater before you install,

operate, or service it. If you have diﬃ culty following the direc ons, or

aren’t sure you can safely and properly do any of this work yourself:

• Call your Local plumbing supplies store to have this water heater installed. Profes-

sional Installa on is available for this product and the work is guaranteed.

• Schedule an appointment with a qualiﬁ ed person to install your water heater.

• Call our Technical Assistance Hotline at 1-800-527-1953 . We can help you with in-

stalla on, opera ons, troubleshoo ng, or maintenance. Before you call, write down

the model and serial number from the water heater’s data plate.

Incorrect installa on, opera on, or service can damage the water heater, your house

and other property, and present risks including ﬁ re, scalding, electric shock, and

explosion, causing serious injury or death.

AHRI Cer ﬁ ca on® applies to residen al electric water heaters with rated capaci es

of 20 to 120 gallon and input ra ngs of 12 kw or less.

COMPLETED INSTALLATION TYPICAL

Hot water line

Water shut

o valve

Cold water line

Expansion tank

Electrical junction

box

T&P relief valve

T&P discharge pipe

Drain pan discharge pipe

Drain

Control assembly

Lower element &

lower relay access

Drain valve

Drain pan

SAFETY

Residen al Electronic Thermostat Electric Water Heater Use and Care Guide • 3

IMPORTANT SAFETY INFORMATION

Important informa on to keep

Fill out this sec on and keep this

manual in the pocket of the water

heater for reference.

Date Purchased:

Model number:

Serial number:

Maintenance performed:* Date:

This is the safety alert symbol. It is used to alert you to

poten al physical injury hazards. Obey all safety mes-

sages that follow this symbol to avoid possible property

damage, serious injury or death. Do not remove any

permanent instruc ons, labels, or the data plate from either the outside of

the water heater or on the inside of the access panels. Keep this manual

near the water heater.

DANGER

Read and follow all safety messages and instruc ons in

this manual.

DANGER indicates hazardous

situa on that, if not avoided, will

result in death or serious injury.

WARNING

WARNING indicates a hazardous

situa on that, if not avoided, could

result in death or serious injury.

CAUTION

CAUTION indicates a hazardous

situa on that, if not avoided, could

result in minor or moderate injury.

NOTICE

NOTICE indicates prac ces not

related to physical injury.

*Drain and ﬂ ush the tank and remove

the anode rod and inspect a er the

ﬁ rst six months of opera on and at

least annually therea er. Operate the

Temperature and Pressure Relief Valve

(T&P) annually and inspect T&P valve

every 2-4 years (see the label on the

T&P valve for maintenance schedule).

If no label is a ached to the T&P Relief

Valve, follow the instruc ons in the T&P

Relief Valve Maintenance sec on of this

manual. See the Maintenance sec on

for more informa on about maintaining

this water heater.

This product is certified to comply with a maximum weighted average of

0.25% lead content as required in some areas.

4 • Residen al Electronic Thermostat Electric Water Heater Use and Care Guide

IMPORTANT SAFETY INFORMATION

o reduce the risk of property

damage, serious injury or death,

read and follow the precau ons below,

all labels on the water heater, and

the safety messages and instruc ons

throughout this manual.

RISKS DURING INSTALLATION

AND MAINTENANCE

Electric Shock Risk

Contact with the electrical

parts in the junction box and

behind the access doors can

result in severe injury or death from

electrical shock:

 Disconnect power by open-

ing the circuit breaker or

removing the fuses before

installing or servicing.

 Use a non-contact circuit

tester to confirm that power

is off before working on or

near any electrical parts.

 Replace the junction box

cover and access doors after

servicing.

Li ing Risk

WARNING! The

water heater is heavy.

Follow these precau-

 ons to reduce the risk of property

damage, injuries from li ing or impact

injuries from dropping the water

heater.

 Use at least two people to li the

water heater.

 Be sure you both have a good grip

before li ing.

U se an appliance dolly or hand

truck to move the water heater.

Scalding Risk

This water heater can

make water hot

enough to cause

severe burns instantly, resulting in

severe injury or death.

• Feel water before bathing or

s howering

• To reduce the risk of scalding, install

Thermostatic Mixing Valves (tempera-

ture limiting valves) at each point-

of-use. These valves automatically

mix hot and cold water to limit the

temperature at the tap. Mixing valves

are available from your local plumb-

ing supplier. Follow manufacturer’s

instructions for installation and adjust-

ment of the valves.

• The thermostat(s) on this water

heater have been factory set to

approximately 120°F to reduce the

risk of scalding. Higher tempera-

tures increase the risk of scalding,

but even at 120°F, hot water can

scald. If you choose a higher tem-

perature, Thermostatic Mixing

Valves located at each point-of-use

are particularly important to help

avoid scalding.

Temperature Time to Produce

a Serious Burn

120°F (49°C) More than 5 minutes

125°F (52°C) 1½ 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 1½ seconds

155°F (68°C) About 1 second

For informa on about changing the

factory thermostat se ng(s), refer to

the “Adjus ng Temperature” sec on in

this manual (“Step 11” on page 15).

Even if you set the water heater

thermostat(s) to a low se ng, higher

temperatures may occur in certain

circumstances:

In some cases, repeated small draws of

water can cause the hot and cold water

in the tank to “stack” in layers. If this

happens, the water can be as much as

thirty degrees ho er than the thermo-

stat se ng. This temperature varia on

is the result of your usage pa ern and

is not a malfunc on.

Water temperature will be ho er if

someone adjusted the thermostat(s) to

a higher se ng.

Problems with the thermostat(s),

or other malfunc ons may result in

higher than expected water tempera-

tures.

If the water heater is in a hot envi-

ronment, the water in the tank can

become as hot as the surrounding air,

regardless of the thermostat se ng.

If the water supplied to the water

heater is pre-heated (for example, by

fa solar system) the temperature in

the tank may be higher than the water

heater’s thermostat se ng.

To reduce the risk of unusually hot wa-

ter reaching the ﬁ xtures in the house,

install Thermosta c Mixing Valves at

each point-of-use.

If anyone in your home is at par cular

risk of scalding (for example, the el-

derly, children, or people with disabili-

 es) or if there is a local code or state

law requiring a certain water tempera-

ture at the hot water tap, then these

precau ons are par cularly important.

According to a na onal standard Ameri-

can Society of Sanitary Engineering

(ASSE 1070) and most local plumbing

codes, the water heater’s thermostat

should not be used as the sole means to

regulate water temperature and avoid

scalds.

SAFETY

Residen al Electronic Thermostat Electric Water Heater Use and Care Guide • 5

Properly adjusted Thermosta c Mixing

Valves installed at each point-of-use al-

low you to set the tank temperature to

a higher se ng without increasing risk

of scalds. A higher temperature se ng

allows the tank to provide much more

hot water and can help provide proper

water temperatures for appliances such

as dishwashers and washing machines.

Higher tank temperatures (140°F)

also kill bacteria that cause a condi-

 on known as “smelly water” and can

reduce the levels of bacteria that cause

water-borne diseases.

Water Contamina on Risk

Do not use chemicals that could con-

taminate the potable water supply. Do

not use piping that has been treated

with chromates, boiler seal, or other

chemicals.

Fire Risk

To reduce the risk of a

fire that could destroy

your home and serious-

ly injure or kill people:

• D o not store things that can burn

easily such as paper or clothes next

to the water heater.

• Be sure the junction box cover and

the access door covers are in place.

These covers keep debris from enter-

ing and potentially being ignited,

and help keep any internal fires from

spreading.

• Keep the water heater from becom-

ing wet. Immediately shut the water

heater off and have it inspected by a

qualified person if you find that the

wiring, thermostat(s) or surround-

ing insulation have been exposed to

water in any way (e.g., leaks from

plumbing, leaks from the water heat-

er itself can damage property and

could cause a fire risk). If the water

heater is subjected to flood condi-

tions or the thermostat(s) have been

submerged in water, the entire water

heater must be replaced.

• Make electrical connections properly,

according to the instructions on page

14. Use 10 gauge solid copper wire.

Use a UL listed or CSA approved

strain relief. Connect ground wire to

green ground screw.

Explosion Risk

High temperatures and

pressures in the water

heater tank can cause an

explosion resul ng in property

damage, serious injury or death. A

new Temperature and Pressure (T&P)

Relief Valve is included with your water

heater to reduce risk of explosion by

discharging hot water. Addi onal

temperature and pressure protec ve

equipment may be required by local

codes.

A na onally recognized tes ng labora-

tory maintains periodic inspec on of

the valve produc on process and cer -

ﬁ es that it meets the requirements

for Relief Valves for Hot Water Supply

Systems, ANSI Z21.22. The T&P Relief

Valve’s relief pressure must not exceed

the working pressure ra ng of the wa-

ter heater as stated on the ra ng plate.

Maintain the T&P Relief Valve properly.

Follow the maintenance instructions

provided by the manufacturer of the

T&P Relief Valve (label attached to T&P

Relief Valve). If no label is attached

to the T&P Relief Valve, follow the

instructions in the T&P Relief Valve

Maintenance section of this manual.

An explosion could occur if the T&P

Relief Valve or discharge pipe is

blocked. Do not cap or plug the T&P

Relief Valve or discharge pipe.

Fire and Explosion Risk if Hot Water is

Not Used for Two Weeks or More

C AUTION! Hydrogen gas builds up in

a hot water system when it is not used

for a long period (two weeks or more).

Hydrogen gas is extremely ﬂ ammable.

If the hot water system has not been

used for two weeks or more, open a

hot water faucet for several minutes at

the kitchen sink before using any elec-

trical appliances connected to the hot

water system. Do not smoke or have

an open ﬂ ame or other igni on source

near the faucet while it is open.

SAFETY

IMPORTANT SAFETY INFORMATION

6 • Residen al Electronic Thermostat Electric Water Heater Use and Care Guide

GETTING STARTED

Figure 1 - Flexible connectors use compression

fittings and do not require soldering.

Figure 2 - Use a non-contact circuit tester to

insure that the power is off before you work on

a circuit.

Figure 3 - Install a Pressure Reducing Valve set

to 50 to 60 PSI.

Review all of the instruc ons

before you begin work.

Improper installa on can

damage the water heater, your home

and other property, and can present

risks of serious injury or death.

Check with your local and

state authori es for any local

or state codes that apply to

your area. In the absence of local and

state codes, follow Na onal Fire

Protec on Associa on (NFPA-70) and

the current edi ons of the Na onal

Electric Code (NEC) and the Inter-

na onal Plumbing Code (IPC). The

instruc ons in this manual comply

with na onal codes, but the installer

is responsible for complying with local

codes.

Massachuse s code requires this wa-

ter heater to be installed in accordance

with Massachuse s 248-CMR 2.00 and

248-CMR 5.00: State Plumbing Code.

Other local and state authori es may

have similar requirements or other

codes applicable to the installa on of

this water heater.

Before you start, be sure you

have, and know how to use, the

following tools and supplies:

• Plumbing tools and supplies appropriate

for the type of water pipes in your home

• Threaded connectors (Figure 1) for

the cold and hot water pipes

• For homes plumbed with plas c

pipe, use threaded connectors

suitable for the speciﬁ c type of

plas c pipe used: CPVC and PEX

(cross-linked polyethylene). Do

not use PVC pipe.

• For homes with copper pipes,

you may purchase connector kits

with compression ﬁ  ngs that

don’t require soldering (Figure

1). Compression ﬁ  ngs are

easier to install than soldering

copper pipes.

• Thread sealant tape or pipe joint

compound approved for potable

water

• Tools to make the electrical connec-

 ons (for example, screwdrivers, wire

strippers)

• Non-Contact circuit tester to check

for power (Figure 2)

• Water Pressure Gauge (see next

page, Figure 4)

Recommended Accessories:

• Suitable drain pan (see Figure 6 on

page 8)

• Pressure Reducing Valve (Figure 3)

• Thermal Expansion Tank (see Figure 5

on page 7)

• Point-of-use Thermosta c Mixing

Valves (see Figure 7 on page 8).

Residen al Electronic Thermostat Electric Water Heater Use and Care Guide • 7

INSTALLATION

IMPORTANT: Follow these steps for

proper installa on:

Step 1:

✓

Verify that your

home is equipped

and up-to-date for

proper opera on

Installing a new water heater is the

perfect  me to examine your home’s

plumbing system and make sure the

system is up to current code standards.

There have likely been plumbing code

changes since the old water heater was

installed. We recommend installing the

following accessories and any other

needed changes to bring your home up

to the latest code requirements.

Use the checklist below and inspect

your home. Install any devices you need

to comply with codes and assure that

your new water heater performs at its

best. Check with your local plumbing

oﬃ cial for more informa on.

✓

Water pressure

We recommend checking your

home’s water pressure with a pressure

gauge (Figure 4). Most codes allow a

maximum incoming water pressure of

80 psi. We recommend a working pres-

sure no higher than 50-60 psi.

HOW: Purchase an inexpensive water

pressure gauge available at your local

plumbing supplier. Connect the Water

Pressure Gauge to an outside faucet

and measure the maximum water

pressure experienced throughout the

day (highest water pressures o en oc-

cur at night).

Figure 4 - Use a Water Pressure Gauge to make

sure your home’s water pressure is not too high.

To limit your home’s water pressure:

Locate your home’s Pressure Reduc-

ing Valve (PRV) on the main incoming

(cold) water supply line and adjust the

water pressure control to between 50

and 60 psi. If your home does not have

a Pressure Reducing Valve, install a

PRV on the home’s main water supply

line and set it to between 50 and 60

psi. Pressure Reducing Valves are avail-

able at your local plumbing supplier.

BACKGROUND: Over the years, many

u li es have increased water sup-

ply pressures so they can serve more

homes. In some homes today, pres-

sures exceed 100 psi. High water

pressures can damage water heaters,

causing premature leaks. If you have

replaced toilet valves, had a water

heater leak, or had to repair applianc-

es connected to the plumbing system,

pay par cular a en on to your home’s

water pressure. When purchasing a

PRV, make sure the PRV has a built-in

bypass.

✓

Water pressure

increase caused by

thermal expansion

Verify that you have a properly sized

Thermal Expansion Tank (Figure 5). We

recommend installing an expansion

tank if your home does not have one.

Codes require a properly pressurized,

properly sized Thermal Expansion Tank

in almost all homes. (See image on

inside front cover.)

Figure 5 - A Thermal Expansion Tank helps pro-

tect the home’s plumbing system from pressure

spikes.

HOW: Connect the Thermal Expansion

Tank (available at your local plumbing

supplier) to the cold water supply line

near the water heater. The expansion

tank contains a bladder and an air

charge. To work properly, the Thermal

Expansion Tank must be sized accord-

ing to the water heater’s tank capacity

and pressurized to match the home’s

incoming water pressure. Refer to the

installa on instruc ons provided with

the Thermal Expansion Tank for instal-

la on details.

INSTALLATION

8 • Residen al Electronic Thermostat Electric Water Heater Use and Care Guide

INSTALLATION

BACKGROUND: Water expands when

heated, and the increased volume

of water must have a place to go, or

thermal expansion will cause large in-

creases in water pressure (despite the

use of a Pressure Reducing Valve on

the home’s main water supply line).

The Safe Drinking Water Act of 1974

requires the use of back ﬂ ow preven-

ta ves and check valves to restrict

water from your home reentering

the public water system. Back ﬂ ow

preventa ves are o en installed in

water meters and may not be readily

visible. As a result, most all plumbing

systems today are now “closed,” and

almost all homes now need a Thermal

Expansion Tank.

A Thermal Expansion Tank is a prac -

cal and inexpensive way to help avoid

damage to the water heater, washing

machine, dishwasher, ice maker and

even toilet valves. If your toilet oc-

casionally runs for no apparent reason

(usually brieﬂ y at night), that may be

due to thermal expansion increasing

the water pressure temporarily.

Water pipe and tank

leaks

Leaks from plumbing pipes or from

the water heater itself can damage

property and could cause a ﬁ re risk.

Figure 6 - A suitable drain pan piped to an

adequate drain can help protect flooring from

leaks and drips.

• Install a suitable drain pan (available

in stores ) under the water heater

(Figure 6) to catch condensa on or

leaks in the piping connec ons or

tank. Most codes require, and we

recommend, installing the water

heater in a drain pan that is piped

to an adequate drain. The drain pan

must be at least two inches wider

than the diameter of the water

heater. Install the drain pan so the

water level would be limited to a

maximum depth of 1-3/4”.

✓

Water tempera-

ture regula on

Install Thermosta c Mixing Valves

(Figure 7) to regulate the temperature

of the water supplied to each point-

of-use (for example, kitchen sink,

bathroom sink, bath, shower). Consult

the valve manufacturer’s instruc ons

or a qualiﬁ ed person.

Figure 7 - Thermostatic Mixing Valves installed

at each point-of-use can help prevent scalding.

WARNING! Even if the water heater

thermostat is set to a rela vely low

temperature, hot water can scald.

Install Thermosta c Mixing Valves at

each point-of-use to reduce the risk of

scalding (see page 4).

BACKGROUND: A Thermosta c Mix-

ing Valve, installed at each point-

of-use, mixes hot water from the

water heater with cold water to more

precisely regulate the temperature of

hot water supplied to ﬁ xtures. If you

aren’t sure if your plumbing system

is equipped with properly installed

and adjusted Thermosta c Mixing

Valves at each point where hot water

is used, contact a qualiﬁ ed person for

more informa on.

INSTALLATION

Residen al Electronic Thermostat Electric Water Heater Use and Care Guide • 9

Step 2:

Verify that the loca on

is appropriate

Before installing your water heater,

ensure that:

The water heater will be:

• Installed indoors close to the center

of the plumbing system.

• In a suitable drain pan piped to an ad-

equate ﬂ oor drain or external to the

building (See Figure 6 on page 8).

• In an area that will not freeze

• In an area that is suitable for install-

ing the water heater ver cally.

The loca on has adequate

space (clearances) for periodic

servicing.

The ﬂ oor can support the

weight of a full water heater.

Your area is not prone to

earthquakes. If it is, use

special straps as required by

local building codes.

NOTICE: The state of California re-

quires bracing, anchoring, or strapping

the water heater to avoid its moving

during an earthquake. Contact local

u li es for code requirements in your

area, visit h p://www.dsa.dgs.ca.gov,

or call 1-916-445-8100 and request

instruc ons. Other loca ons may have

similar requirements. Check with your

local and state authori es.

The loca on is not prone to

physical damage by vehicles,

ﬂ ooding, or other risks.

Vehicle

Stop

Drain

Pan

Figure 8 - In a garage, install a vehicle stop to

avoid water heater damage.

Avoid loca ons such as a cs,

upper ﬂ oors, or where a leak

might damage the structure

or furnishings. Due to the normal

corrosive ac on of water, the tank will

eventually leak. To minimize property

damage from leaks, inspect and

maintain your water heater in accor-

dance with this manual’s instruc ons.

Install a suitable drain pan under the

water heater piped to an adequate

drain. Inspect the drain pan, pipes, and

surrounding area regularly and ﬁ x any

leaks found. Drain pans are available at

your local plumbing supplier. Leaks are

frequently in the plumbing system

itself and not the water heater.

Step 3:

Removing the old water

heater

Read each installa on step

and decide if you have the

necessary skills to install the

water heater. Only proceed if you can

safely perform the work. If you are not

comfortable, have a qualiﬁ ed person

perform the installa on.

Locate the water heater’s

circuit breaker and turn it OFF

(or remove the circuit’s

fuses).

On the old water heater,

remove the electrical

junction box access panel.

Using a non-contact circuit tester,

check the wiring to make certain the

power is OFF.

WARNING! Working on an ener-

gized circuit can result in severe injury

or death from electrical shock.

Disconnect the electrical

wires.

Open a hot water faucet and

let the hot water run un l it is

cool (This may take 10

minutes or longer).

Figure 9 - Let the hot water run until it is cool.

WARNING! Be sure the water runs

cool before draining the tank to reduce

the risk of scalding.

Connect a garden hose to the

drain valve and place the

other end of the hose in a

drain, outside, or a bucket. (Note that

sediment in the bo om of the tank

may clog the valve and prevent it

from draining. If you can’t get the

tank to drain, contact a qualiﬁ ed

person.)

INSTALLATION

10 • Residen al Electronic Thermostat Electric Water Heater Use and Care Guide

INSTALLATION

Turn the cold water supply

valve OFF.

Open the drain valve on the

water heater.

Figure 10 - Draining the old water heater.

Also open a hot water faucet

to help the water in the tank

drain faster.

When the tank is empty,

disconnect the Temperature

& Pressure (T&P) Relief Valve

discharge pipe. You may be able to

reuse the discharge pipe, but do not

reuse the old T&P Relief Valve. A new

T&P Relief Valve comes installed on

your water heater (or on some models,

is in the carton with the water heater).

Figure 11 - Removing the T&P Relief Valve

discharge pipe.

Disconnect the water pipes.

Many water pipes are

connected by a threaded

union which can be disconnected with

wrenches. If you must cut the water

pipes, cut the pipes close to the water

heater’s inlet and outlet connec ons,

leaving the water pipes as long as

possible. If necessary, you can make

them shorter later when you install

the new water heater.

Remove the old water heater.

WARNING! Use two or more people

to remove or install water heater.

Failure to do so can result in back or

other injury.

Step 4:

Installing the new

water heater

Completely read all instruc-

 ons before beginning. If you

are not sure you can com-

plete the installa on, DO NOT

RETURN THIS UNIT TO THE STORE.

Seek assistance from any of the

following sources:

• Professional Installa on is available

for this product and the work is

guaranteed. Contact a local plumb-

ing supplier to have this water

heater installed.

• Schedule an appointment with

a qualiﬁ ed person to install your

water heater.

• Call our Technical Assistance Hotline

at 1-800-527-1953.

Install a suitable drain pan

that is piped to an adequate

drain.

Set the water heater in place

taking care not to damage

the drain pan.

NOTICE: Most codes require se ng

the water heater in a suitable drain

pan piped to an adequate drain. The

drain pan helps avoid property dam-

age which may occur from condensa-

 on or leaks in the piping connec ons

or tank. The drain pan must be at

least two inches wider than the diam-

eter of the water heater. Install the

drain pan so the water level is limited

to a maximum depth of 1-3/4”.

Verify that the water heater

is set in place properly. Check

that:

• The T&P Relief Valve will not be in

contact with any electrical parts.

• There is adequate space to install

the T&P Relief Valve discharge pipe

and that it can be piped to a sepa-

rate drain (and not into the drain

pan).

• There is adequate access and space

around the water heater for future

maintenance.

INSTALLATION

DO NOT CONNECT ELECTRICAL

WIRING UNTIL YOU ARE

INSTRUCTED TO DO SO.

NOTICE: Connec ng electrical power

to the tank before it is completely

full of water (water must run FULL

STREAM from a hot water tap for a full

three minutes) may cause the upper

hea ng element to burn out.

Connect the Tempera-

ture and Pressure (T&P)

Relief Valve/Pipe

Most T&P Relief Valves are pre-installed

at the factory. In some cases, they are

shipped in the carton and must be

installed in the opening marked and

provided for this purpose and according

to local codes.

WARNING! To avoid serious injury

or death from explosion, install a T&P

Relief Valve according to the following

instruc ons:

If your water heater does not

have a factory installed T&P

Relief Valve, install the new

T&P Relief Valve that came with your

water heater. Do not reuse an old T&P

Relief Valve. Install a T&P Relief Valve

discharge pipe according to local codes

and the following guidelines:

• The discharge pipe should be at least

3/4” inside diameter and sloped for

proper drainage. Install it to allow

complete drainage of both the T&P

Relief Valve and the discharge pipe.

• The discharge pipe must withstand

250°F (121°C) without distor on. Use

only copper or CPVC pipe. Do not

use any other type of pipe, such as

PVC, iron, ﬂ exible plas c pipe, or any

type of hose.

Figure 12 - The T&P Relief Valve discharge pipe

must be installed properly and piped to an

adequate drain.

• Terminate the discharge pipe a maxi-

mum of six inches above a ﬂ oor drain

or outside the building. Do not drain

the discharge pipe into the drain

pan; instead pipe it separately to

an adequate drain. In cold climates,

terminate the discharge pipe inside

the building to an adequate drain.

Outside drains could freeze and

obstruct the drain line. Protect the

drain from freezing.

DISCHARGE

PIPE

DRAIN

PIPE

Figure 13 - The end of the T&P Relief Valve dis-

charge pipe must stop no more than six inches

above a floor drain or outside.

• Do not place any valve or other re-

stric on between the tank and T&P

Relief Valve. Do not cap, block, plug,

or insert any valve between the T&P

Relief Valve and the end of the dis-

charge pipe. Do not insert or install

any reducer in the discharge pipe.

Residen al Electronic Thermostat Electric Water Heater Use and Care Guide • 11

Step 5:

INSTALLATION

Install shutoﬀ and

tempering valves

If one is not already installed,

install a manual shutoﬀ valve

in the cold water line that

supplies the water heater. Install the

shutoﬀ valve near the water heater so

that it is readily accessible. Only use

valves that are compa ble with

potable water. Use only full-ﬂ ow ball

or gate valves. Other types of valves

may cause excessive restric on to the

water ﬂ ow.

Install a Thermosta c Mixing

Valve at each point-of-use

(for example, kitchen sink,

bathroom sink, bath, shower).

Consult the valve manufacturer’s

instruc ons or a qualiﬁ ed person.

Figure 14 - Install Thermostatic Mixing Valves at

each point where hot water will be used.

WARNING! Even if the water

heater’s thermostat(s) are set to a

rela vely low temperature, hot water

can scald. Install Thermosta c Mixing

Valves at each point-of-use to reduce

the risk of scalding. (See page 4.)

For water heaters that are fed

by a solar water hea ng

system (or any other pre-heat-

ing system), always install a Thermo-

sta c Mixing Valve or other tempera-

ture limi ng device in the inlet water

supply line to limit water supply inlet

temperature to 120°F. Solar water

hea ng systems can supply water with

temperatures exceeding 170°F and

may result in water heater malfunc-

 on.

WARNING! Hot water provided by

solar hea ng systems can cause

severe burns instantly, resul ng in

severe injury or death (see page 4).

Connect the water

supply

Determine the type of water pipes in

your home. Most homes use copper

water pipes, but some use CPVC or

cross-linked polyethylene (PEX). Use

ﬁ  ngs appropriate for the type of pipe

in your home. Do not use iron or PVC

pipe – they are not suitable for potable

water.

Connect the cold water

supply using 3/4 inch

Na onal Pipe Thread “NPT”

to the ﬁ  ng marked “C” (COLD).

For ease of removing the water heater

for service or replacement, connect

the water pipes with a coupling called

a union. We recommend using a

dielectric-type union, commonly avail-

able at most local plumbing suppliers.

Dielectric unions can help prevent

corrosion caused by  ny electric cur-

rents common in copper water pipes

and can help extend the life of the

water heater.

12 • Residen al Electronic Thermostat Electric Water Heater Use and Care Guide

INSTALLATION

Step 6:

Step 7:

IF YOU HAVE COPPER PIPES:

If your home has copper water pipes,

you can solder the water pipe connec-

 ons or use compression ﬁ  ngs which

don’t require soldering. Compression

ﬁ  ngs are easier to install than solder-

ing pipe. Check with local plumbing

oﬃ cials to determine what types of

pipe materials are suitable for your

loca on. Do not use lead-based solder.

NOTICE: Do not solder pipes while

they are a ached to the water heater.

The water heater’s inlet and outlet

connec ons contain non-metallic parts

which could be damaged. The proper

way to connect the water heater to

copper water pipes is as follows:

• Solder a short length of pipe (about a

foot or so) to a threaded adapter us-

ing only 95/5  n-an mony or equiva-

lent solder. A ach the threaded

adapters to the water heater’s con-

nec ons (using thread sealant tape

or pipe joint compound). Connect

the home’s water pipes by soldering,

keeping the connec ons at the water

heater cool with wet rags.

INSTALLATION

Residen al Electronic Thermostat Electric Water Heater Use and Care Guide • 13

NOTICE: Most water heater models

contain energy saving heat traps in the

inlet and outlet connec ons to avoid

the circula on of hot water within the

pipes during standby. Do not remove

the heat traps.

Connect the hot water supply

using 3/4 inch NPT to the

ﬁ  ng marked “H” (HOT).

Follow the same connec on guidelines

as for the cold water supply.

Install insula on (or heat

tape) on the water pipes

especially if the indoor

installa on area is subject to freezing

temperatures. Insula ng the hot water

pipes can increase energy eﬃ ciency.

Double check to make sure

the hot and cold water pipes

are connected to the correct

hot and cold water ﬁ  ngs on the

water heater.

If needed, install (or adjust)

the home’s Pressure Reducing

Valve to 50-60 psi and install a

Thermal Expansion Tank.

Figure 15 - A Pressure Reducing Valve is required

if your home’s water pressure is above 80 psi.

Figure 16 - The Thermal Expansion Tank should

be pressurized with air, to match the home’s

incoming water pressure.

Step 8:

Verify connec ons and

completely ﬁ ll tank

To remove air from the tank and allow

the tank to ﬁ ll completely with water,

follow these steps:

Remove the aerator at the

nearest hot water faucet. This

allows any debris in the tank

or plumbing system to be washed out.

Turn the cold water supply

back on.

Full-ﬂ ow ball valve

Figure 17 - Fully open the cold water supply

valve.

Open a hot water faucet and

allow the water to run un l it

ﬂ ows with a full stream.

Let the water run full stream

for three full minutes.

Close the hot water faucet

and replace the aerator.

Check inlet and outlet

connec ons and water pipes

for leaks. Dry all pipes so that

any drips or leaks will be apparent.

Repair any leaks. Almost all leaks occur

at connec ons and are not a tank leak.

INSTALLATION

14 • Residen al Electronic Thermostat Electric Water Heater Use and Care Guide

INSTALLATION

Make electrical

connec ons

WARNING! Working on an ener-

gized circuit can result in severe injury

or death from electrical shock.

NOTICE: Although this water heater is

equipped with Dry-Fire protec on, be

sure the tank is completely ﬁ lled with

water and all the air is purged from

the tank, before making any electrical

connec ons.

Be sure the electrical power

to the water heater is turned

OFF at the circuit breaker

panel (or remove the circuit’s fuses).

Using a non-contact circuit

tester, check the wiring to

make certain the power is OFF.

Check the water heater’s

data plate and ensure that

the home’s voltage, wiring

size (ampacity) and circuit breaker

ra ng and type are correct for this

water heater. Refer to the wiring

diagram located on the water heater

for the correct electrical connec ons.

Ensure that wire sizes, type, and

connec ons comply with all appli-

cable local codes. In the absence of

local codes, follow NFPA-70 and the

current edi on of the Na onal Electric

Code (NEC).

Remove the cover on the

electrical junc on box on the

top of the water heater.

DATA PLATE

Figure 18 - The water heater’s electrical require-

ments can be determined from the data plate.

Install wiring in an approved

conduit (if required by local

codes). Use a UL listed or CSA

approved strain relief to secure the

electrical wiring to the water heater.

Connect the ground wire to

the green ground screw.

Connect the home’s two

power wires to the water heater’s two

power wires (black to black, red to

red). Use suitable twist-on wire

connector or other approved means

to make the power connec ons.

Red Wires

(1)

Ground

Wires

1/2” Conduit

Connection

Black Wires

(1)

Figure 19 - Connecting the electrical wires.

Replace the junc on box

cover and secure with the

screws provided.

WARNING! Be sure cover is secured

to reduce the risk of ﬁ re and electric

shock.

NOTICE: The tank must be com-

pletely empty of air and full of

water before connec ng electrical

power to avoid “Dry Firing.” Dry

Firing may result in the upper ele-

ment burning out. This is a com-

mon installa on mistake. A er

you make the water connec ons,

but before you connect the electri-

cal power, open a hot water faucet

and let the water run full un l all

the air is removed. Let the “hot”

water run full for three minutes

or longer before connec ng any

electrical wires. A Dry Fired upper

hea ng element is an installa on

error and is not covered under

warranty.

This model is equipped with Dry-

Fire protec on, which will ac vate

an error code if the above steps

are not fully followed.

Step 9:

INSTALLATION

Residen al Electronic Thermostat Electric Water Heater Use and Care Guide • 15

INSTALLATION

Step 10:

Adjus ng the

Temperature

With the installa on steps completed,

you may adjust the water heater’s

temperature se ng if desired.

WARNING! Be sure panels are

secured to reduce the risk of ﬁ re and

electric shock.

Turn the electric power back

on.

Set the thermostat to the

desired temperature, on the

control assembly (See

Adjus ng the Control Assembly’s

Opera oal Modes found on page 17).

The set point on this water heater has

been factory set to approximately

120°F to reduce the risk of scald injury.

You may wish to set a higher tempera-

ture to provide hot water for automat-

ic dishwashers or laundry machines, to

provide more hot water capacity, and

to reduce bacterial growth. Higher

tank temperatures (140° F) kill bacteria

that cause a condi on known as

“smelly water” and can reduce the

levels of bacteria that cause water-

borne diseases. See Adjus ng the

Control Assembly’s Opera oal Modes

found on page 17.

WARNING! Higher temperatures

increase the risk of scalding, but even at

120°F, hot water can scald (see page 4).

If you increase the water heater’s tem-

perature se ng, install Thermosta c

Mixing Valve(s) at each point-of-use to

reduce the risk of scalding.

Figure 20 - Adjust Thermostatic Mixing Valves at

each point-of-use to 120°F or lower.

WARNING! Working near an

energized circuit can result in severe

injury or death from electrical shock.

Check wires with a circuit tester to

make sure power is oﬀ .

Wait for the water to heat up.

It may take several hours for a

tank of cold water to heat up.

If you have no hot water a er two

hours, refer to the Troubleshoo ng

Sec on (see page 20).

WARNING! If you have increased

the temperature se ng and the

Thermosta c Mixing Valves are not set

properly (or not installed) you could

scald yourself while checking the

temperature.

Check water temperature at

several points of use in your

home (for example, bathtub

faucet, shower, or lavatory sink) and

adjust the Thermosta c Mixing Valves

as needed. If you aren’t sure how to

adjust the Thermosta c Mixing Valve

se ngs, or aren’t sure if you have

Thermosta c Mixing Valves, contact a

qualiﬁ ed person.

Step 11:

Opera on

The water heater is now ready for

normal operation. To keep your water

heater working safely and efficiently

and extend its life, perform mainte-

nance according to the schedule on

page 26.

Turn the electric power on at the

circuit breaker panel, or fuse box.

Power to the water heater will allow

the water heater to run a system diag-

nostic. This typically takes a few min-

utes. Once complete, proceed to the

Operations section of this manual.

NOTICE: If the system diagnostic yields

any codes, reference the diagnostic

codes section in this manual.

INSTALLATION

16 •

OPERATION

16 • Residen al Electronic Thermostat Electric Water Heater Use and Care Guide

OPERATION

General Opera on

(Control Assembly)

IMPORTANT: On the ini al start up of the

unit, the water heater will go through a

seven (7) to ten (10) minute diagnos c

period prior to hea ng the water.

NOTICE: If the water is warm/hot, the

unit will not go through the diagnos c

period.

The primary func on of the control

assembly is to heat the water in the tank

un l it reaches the control set point.

The control assembly has two means of

hea ng the water, the upper element and

the lower element, and only energizes

one element at a  me. A er reaching the

control set point, the temperature in the

tank is allowed to drop a pre-determined

amount before the elements are turned

on again. NOTICE: The water heater can

be controlled remotely through the use

of the app over a Wi-Fi connec on (see

page 18).

The control logic of the control assembly

is designed so that the upper hea ng

element will always have priority over

the lower hea ng element when both

elements call for heat. The temperature

regula on will not performed un l a er

the Dry-Fire detec on algorithm indicates

that there is suﬃ cient water in the tank.

Vaca on Mode (Control

Assembly)

To save energy, select Vaca on mode to

lower the temperature se ng on the

thermostat if you plan to be away for an

extended  me.

NOTICE: Vaca on mode has a ﬁ xed set

point of 50°F/10°C.

When Vaca on mode is selected, the

vaca on  mer will be displayed. The

default vaca on days are preset at 7

days. Press the Up and Down bu on to

modify the  mer to desired number of

vaca on days (se ng range: 1 to 99 days

or permanently ON). The vaca on  mer

will blink on the display; press the Enter

bu on to conﬁ rm the vaca on  mer. To

deac vate Vaca on mode, press the

Vaca on mode bu on to return to the

previous opera ng mode or press the

bu on for any other desired mode.

When the vaca on days decrease to 9

hours remaining, the Control Assembly

will automa cally switch to the

previously selected mode.

NOTICE: Normally, the display will only

show the remaining vaca on days.

C AUTION! Hydrogen gas builds up in

a hot water system when it is not used

for a long period (two weeks or more).

Hydrogen gas is extremely ﬂ ammable.

If the hot water system has not been

used for two weeks or more, open a hot

water faucet for several minutes at the

kitchen sink before using any electrical

appliances connected to the hot water

system. Do not smoke or have an open

ﬂ ame or other igni on source near the

faucet while it is open.

Need Assistance?

Call our Technical Assistance Hotline at 1-800-527-1953 .

We can help you with installa on, opera on, troubleshoo ng,

or maintenance. Before you call, write down the model and serial

number from the water heater’s data plate.

• 17

OPERATION

Opera ng Mode Descrip ons

If locked, the opera ng modes can be changed by holding the

ENTER

bu on for approximately 3 seconds, then touching the

desired mode icon on the control assembly (See Figure 21).

STANDARD - Pressing this bu on will allow the

temperature set point to be set directly.

VACATION MODE - The controller adjusts the set

point to approximately 50

F. This mode is recom-

mended when the water heater is not in use

for a long period of  me. This mode minimizes

energy consump on and prevents the water

heater from freezing during cold weather. While

in Vaca on Mode, pressing “Enter” returns to

Standard Mode.

SMART GRID CONTROL - Pressing this bu on

will enable or disable a request for grid control

(see page 19)

ENTER

CONTROL ASSEMBLY LOCK - Holding this bu on

for more than 3 seconds switches the lock mode

on or oﬀ .

C - Press and hold the “Temperature Down”

bu on, in combina on with the “Enter” bu on,

for 3 seconds to switch temperature unit

between Fahrenheit and Celsius.

Fault condi on will display a three digit fault

code with Alert Icon ﬂ ashing. (See diagnos c

code chart page 20).

Element Func oning Icon - indicates power is on

at either upper or lower element circuits.

CAUTION INDICATOR - Indicates when there is a

Warning/Fault.

DAYS

DAYS - Indicates the number of days (1 to 99+)

the unit will be in vaca on mode are being set.

LOCK - Indicates the control assembly is locked.

Adjusting the Control Assembly’s Operational Modes

Water Temperature Adjustment

IMPORTANT: On the ini al start up of the unit, the water heater will go through a seven (7) to ten (10) minute diagnos c period

prior to hea ng the water. Before a emp ng to adjust the thermostat, read the “Important Safety Informa on” sec on on page 3. If

the instruc ons are not clear, contact a qualiﬁ ed service technician.

The water temperature can be adjusted from 95° F to 150° F by pressing the followed by the

ENTER

bu on to set the desired

temperture. The control assembly is unlocked by default. To lock the display a er se ng the parameters, hold the

ENTER

bu on for 3 seconds.

Residen al Electronic Thermostat Electric Water Heater Use and Care Guide • 17

°C

DAYS

ENTER

Control Assembly

Lock LED Indicator

Element

Functioning

LED Indicator

Water Temperature

Set Point

Temperature

Down (Decrease)

Button

Temperature

Up (Increase)

Button

LCD Display Panel

Enter/Lock Button

Control

Assembly

Top

Thermostat

/ECO

Grid Enabled

Button W/LED

Indicator

Vacation Mode

Button

Celsius LED

Indicator

Fahrenheit LED

Indicator

Standard

Button

Days LED

Indicator

Error LED

Indicator

Figure 21 - Control Assembly

OPERATION

°C

°F/

18 •

OPERATION

18 • Residen al Electronic Thermostat Electric Water Heater Use and Care Guide 18 • Residen al Electronic Thermostat Electric Water Heater Use and Care Guide

OPERATION

Smart Grid Technology

The electric Smart Grid will enable

signiﬁ cant improvements in electric

power reliability and quality through

reduc on of peak power demand, while

providing consumers the knowledge

and ability to manage their energy

consump on and u lity costs.

According to the Department of

Energy (DOE), since 1982 the growth

in peak electricity demand has

exceeded power transmission growth.

This has caused more frequent

blackouts and service interruptions,

as well as an increase in the costly

reserve capacity the power grid

requires to meet higher peak

demands. The increased demand for

electrical power across the nation has

also led to higher peak utility costs.

Smart appliances are one way to

help mitigate this problem. By using

advanced digital communication

technologies, smart appliances will

be able to communicate with local

power company or home energy

management systems, and react

accordingly to save energy and

money. For example, during peak

demand periods the water heater

may pause or delay its power

consumption and thus reduce

the load on the smart utility grid.

Additionally, smart appliances will

also communicate with consumers to

let them know how much energy they

are consuming. This will eventually

allow consumers to control their

appliances, manage energy usage,

and to ultimately save money.

Home Automa on,

Smart Grid Control

(Where Available)

Where available, grid communica on

adaptors called Unitary Control

Modules (UCM) may be supplied

by the local power company or

purchased from leading retailers. A

UCM is a direct digital thermostat that

provides integrated control of the units

thermostat. Please contact your local

power company for more informa on.

WARNING! Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before

opera ng. Failure to do so can result

in death or electrical shock.

To ac vate Smart Grid Control, Turn

“OFF” electric power to the water

heater at the circuit breaker/fuse box.

Using a non-contact circuit tester, check

the power wires to make certain the

power is OFF. Remove the cover over

the grid connec on pins and plug in the

UCM grid communica on adaptor and

return power to the water heater at

the circuit breaker/fuse box. See Figure

23.

ENTER

Remove

Panel

Grid Connection Pins

Figure 22 - Accessing Smart Grid Connection

Pins

NOTICE: Use only approved grid

communica on adaptors. This

will enable the power company to

communicate the peak demand periods

for the water heater’s power usage.

A er this connec on has been made,

the grid control is automa cally

enabled. Press Enter to conﬁ rm UCM is

present. This ac on will be followed by

a solid LED from the grid indicator. See

Figure 24.

Enabling this feature will allow

acceptance of the power company

communica on of grid management

requests.

NOTICE: The LED will blink when the

power company has control of the unit.

°C

DAYS

ENTER

Pressing the Smart Grid Control

button will enable and/or disable

a request for grid control.

Figure 23 - Smart Grid Control Button

To disable (override) grid

control, press the Smart Grid

Control bu on. This ac on will be

followed by a 72 hour  mer. Remove

CTA 2045 UCM. Press Enter to conﬁ rm

the disconnec on. The LED will turn oﬀ .

NOTICE: If the CTA 2045 UCM is not

removed followed by the pressing the

Enter bu on, the grid will be enabled

automa cally once the 72 hour  mer

has ended.

• 19

OPERATION

Residen al Electronic Thermostat Electric Water Heater Use and Care Guide • 19

OPERATION

NOTES:

CONTROL ASSEMBLY DIAGNOSTIC CODE CHART

ERROR CODE INDICATES CORRECTIVE ACTION*

No Error Code Displayed

Not Enough Hot Water

High usage, plumbing leak, operating mode

adjustment.

1. Check for plumbing leak.

2. Adjust temperature; see scald warnings on heater and in manual.

3. Contact a qualified person to perform a volume test.

No Error Code Displayed

Water Too Hot

Water temperature set too high or grounded

element.

1. Reduce temperature setting.

2. Contact a qualified person to test for the grounded element and replace

if necessary.

No Error Code Displayed

No Hot Water

No power, control panel or thermostat opera-

tion

1. Turn off electrical power at breaker.

2. Unplug and reconnect 24 pin connector.

3. Turn on electrical power at breaker

4. Contact a qualified person to verify correct voltage to unit.

001 with an alert Icon flashing.

(also flashing red LED and beeper.)

Dry-fire, electrical power on with the tank not

completely full of water.

1. Turn off electrical power at breaker. Add water, open a hot water faucet

to bleed all air until water flows without air bursts.

2. Turn on electrical power at breaker.

3. See “Important Safety Information” on page 4.

002 with an alert Icon flashing.

(also flashing red LED and beeper.)

Water temperature exceeded high limit. ECO 1. Turn off electrical power at the breaker.

2. Press the reset button (see Figure 26).

3. Turn on electrical power at breaker.

4. If error returns contact a qualified technician to test for the grounded

element. Replace as needed.

5. If both elements test good, replace the thermostat.

6. Turn on electrical power at breaker.

003 with an alert Icon flashing.

(also flashing red LED and beeper.)

Upper thermistor sensor failure.

NOTICE: Upper thermistor sensor is part of

the thermostat.

1. Turn off electrical power at the breaker.

2. Check electrical connections at thermostat.

3. If there are no issues with the wiring, replace the thermostat.

4. Turn on electrical power at breaker.

NOTICE: The control panel will go into Limp Mode until the failure is cor

rected. See page 22.

004 with an alert Icon flashing.

(also flashing red LED and beeper.)

Lower thermistor sensor failure.

NOTICE: Lower thermistor sensor is part of

the thermostat.

1. Turn off electrical power at the breaker.

2. Check electrical connections at thermostat.

3. If there are no issues with the wiring, replace the thermostat.

4. Turn on electrical power at breaker.

NOTICE: The control panel will go into limp mode until the failure is cor

rected. See page 22.

IMPORTANT: Before attempting to adjust the ther-

mostat, read the “Important Safety Information”

section page 4.

If the instructions are not clear, contact a qualiﬁ ed

person.

20 • Residen al Electronic Thermostat Electric Water Heater Use and Care Guide

TROUBLESHOOTING

°C

DAYS

ENTER

Error

Code

Figure 24 - Control Assembly Diagnostic Coding

TROUBLESHOOTING

Residen al Electronic Thermostat Electric Water Heater Use and Care Guide • 21

TROUBLESHOOTING

ERROR CODE INDICATES CORRECTIVE ACTION*

021 with an alert Icon flashing.

(also flashing red LED and beeper.)

Upper element circuit failure.

NOTICE: Lower element is still operable.

1. Turn off electrical power at the breaker.

2. Check element circuits for resistance of 5-25 ohms (replace if required).

3. Check wires at elements and thermostat for damage.

4. Turn on electrical power at breaker.

5. If the error persists, contact a qualified person.

NOTICE: The control assembly will go into limp mode until the failure is cor

rected. See page 22.

022 with an alert Icon flashing.

(also flashing red LED and beeper.)

Lower element circuit failure.

NOTICE: Upper element is still operable.

1. Turn off electrical power at the breaker.

2. Check element circuits for resistance of 5-25 ohms (replace if required).

3. Check wires at elements and thermostat for damage.

4. Turn on electrical power at breaker.

5. If the error persists, contact a qualified person.

NOTICE: The control assembly will go into limp mode until the failure is cor

rected. See page 22.

006 with an alert Icon flashing.

(also flashing red LED and beeper.)

Internal Processor Error

- Frequency Fault

- Standard AD Reference Fault

- Non-Volatile Memory Fault

1. Turn off electrical power at the breaker. Now turn on electrical power to

see if error clears. If error has not cleared, replace the control assembly.

2. Turn on electrical power at breaker.

101 with an alert Icon flashing.

(also flashing red LED and beeper.)

Upper Thermostat Error 1. Turn off electrical power at the breaker, check all electrical connections,

and wiring for damage.

2. Replace the thermostat.

3. Turn on electrical power at breaker.

102 with an alert Icon flashing.

(also flashing red LED and beeper.)

Lower Thermostat Error 1. Turn off electrical power at the breaker, check all electrical connections,

and wiring for damage.

2. Replace the thermostat.

3. Turn on electrical power at breaker.

*These instructions are brief and intended as guidance for a qualiﬁ ed person. If you lack the necessary

skills to perform these procedures call 1-800-527-1953 for assistance.

22 • Residen al Electronic Thermostat Electric Water Heater Use and Care Guide

TROUBLESHOOTING

WARNING! Working near an

energized circuit can result in severe

injury or death from electrical shock.

WARNING! When you are ﬁ nished,

be sure all covers are secured to reduce

the risk of ﬁ re and electric shock.

Limp Mode

The heater will con nue opera ng with

one failed hea ng element by switching

into Limp Mode. Example:

• If the control module determines that

the lower thermistor or lower element

has failed, the lower element call

for heat will be canceled. The upper

element call for heat will s ll allow the

upper element to heat the water as

needed.

• If the control module determines that

the upper thermistor or upper element

has failed, the lower element will be

allowed to heat the water as needed.

NOTICE: The control assembly will

operate in Limp Mode un l the failure is

corrected.

No Hot Water

The most likely reasons for an electric

water heater to produce NO hot water

are:

• No electric power—a common

problem with new installa ons

• Burned out upper element

• Tripped Energy Cut Oﬀ (red bu on

on electronic thermostat)

• The water heater’s inlet and outlet

connec ons are reversed (usually

only in new installa ons)

• Broken electronic thermostat (or wiring)

• A leak in the hot water side of the

plumbing system that exceeds the

water heater’s hea ng capacity and

makes it appear that the water heater

is producing li le to no hot water.

Follow these steps to diagnose and

correct common electrical problems:

Check the electric power to

the water heater. No hot

water is o en caused by a

problem with the home’s electrical

wiring or circuit breakers. You’ll need a

non-contact circuit tester. Follow these

guidelines:

• Locate the water heater’s circuit

breaker and turn it oﬀ (or remove the

circuit’s fuses).

• Locate the electrical junc on box on

top of the water heater and remove

the cover.

• Iden fy the two power wires. The

power wires are connected to the

black/red wires from the water

heater—the green or copper wire is

the ground wire.

• Turn the circuit breaker back on

(or install the fuses) and check the

power on both incoming power wires

using a non-contact circuit tester.

• Turn the power oﬀ and replace the

cover on the electrical junc on box.

If the water heater is not ge ng

power, contact a qualiﬁ ed person to

have your home’s wiring or circuit

breakers checked.

Check/Reset Energy Cut Oﬀ

(ECO) Bu on.

The Energy Cut Oﬀ (ECO) shuts oﬀ

power to the water heater’s elements

if the temperature of the water in

the tank gets too hot. If the ECO has

tripped, you’ll have no hot water. A

tripped ECO can usually be reset, but

you should have a qualiﬁ ed person

inves gate the cause of the overheat-

ing and repair the problem. Do not

turn the power back on un l the cause

of the overhea ng has been iden ﬁ ed

and repaired.

To check the Energy Cut Oﬀ (ECO)

• Turn oﬀ the power to the water

heater.

WARNING! Working near an

energized circuit can result in severe

injury or death from electrical shock.

Check power wires in the electrical

junc on box with a non-contact circuit

tester to make sure power is oﬀ .

• Press the red ECO reset bu on. See

Figure 26.

Reset

Button

Figure 25 - Energy Cut Off (ECO) button

• The ECO was tripped if you hear a

click when it is reset. In most cases,

a tripped ECO indicates that the

tank overheated due to a problem

with one of the elements or thermo-

stats—have a qualiﬁ ed person check

the upper/lower elements and the

upper/lower thermostats. Replace

any of the components if necessary.

• The ECO was not tripped if you didn’t

hear a click. In that case, the thermo-

stats should be checked by a quali-

ﬁ ed person.

• Replace the insula on and both the

upper and lower access panels.

WARNING! Be sure all covers are

secured to reduce the risk of ﬁ re and

electric shock.

TROUBLESHOOTING

Residen al Electronic Thermostat Electric Water Heater Use and Care Guide • 23

Insuﬃ cient Hot Water

or Slow Hot Water

Recovery

WARNING! Because of the in-

creased risk from scalding, if you set

the water heater’s thermostat

higher than 120°F, Thermosta c Mixing

Valves at each point-of-use are

par cularly important (see page 4).

If the hot water is simply not warm

enough, there are several possible

causes:

• Faulty Thermosta c Mixing Valve in a

faucet or shower control (check other

faucets in the house for hot water)

• Temperature set too low on the con-

trol assembly

• Water heater’s capacity too small (or

usage too high)

• Reversed plumbing connec ons or

melted dip tube (usually found soon

a er new installa on)

• Plumbing leak

• Low supply voltage

• Lower Thermistor

Thermosta c Mixing Valves. If the

hot water is simply not warm enough,

make sure the faucet you are checking

doesn’t have a defec ve Thermosta c

Mixing Valve. Many shower controls

now have built-in mixing valves. If

these devices fail, they can reduce the

amount of hot water the shower or

faucet delivers even though there is

plenty of hot water in the tank. Always

check the water temperature at several

faucets to make sure the problem is not

in a faucet or shower control.

Thermostat set too low. If the water

temperature at several faucets is too

cool, adjust the thermostat(s) through

the control assembly according to the

instruc ons on page 17 of the Opera-

 on sec on of this manual.

Undersized water heater. If your water

heater runs out of hot water too quick-

ly, it may be too small for your needs. If

the water heater is old, consider replac-

ing it with a larger model. If the water

heater is in good condi on, you may

be able to meet your family’s hot water

needs with the exis ng water heater by

installing Thermosta c Mixing Valves at

each point-of-use and then turning the

thermostat(s) to a higher se ng. See

page 15, step 11.

You can also reduce your home’s hot

water needs by washing clothes in cold

water, installing ﬂ ow restrictors on

shower heads, repairing leaky faucets,

and taking other conserva on steps.

Reversed connec ons or melted dip

tube. Check the hot and cold connec-

 ons and make sure your home’s hot

water pipe is connected to the hot wa-

ter outlet on the water heater. Usually,

reversed connec ons are found soon

a er the installa on of a new unit. If

copper pipes were soldered while they

were a ached to the water heater, the

dip tube may have melted. The dip tube

is a long plas c tube inside the tank

a ached to the cold water inlet. If the

dip tube has melted, it can be replaced

by removing the cold water inlet con-

nec on, removing the old dip tube and

installing a new one.

Plumbing leak. Even a small leak in the

hot water side of the home’s plumbing

system can make it appear that the wa-

ter heater is producing li le to no hot

water. Locate and repair the leak.

Lower hea ng element not working.

If the lower hea ng element is not

working, you will have some hot water

but not as much as before. Because the

lower element does most of the work,

the lower element usually wears out

before the upper element. Replace the

lower element if necessary (see page

26).

Temperature Too High

If the water temperature is too hot:

• Install or adjust the Thermosta c Mix-

ing Valves for each point-of-use (see

manufacturer’s instruc ons), or

• Adjust the temperature se ng on the

control assembly.

A non func oning thermostat or a

shorted hea ng element can cause

extremely hot water. If the Temperature

and Pressure Relief Valve (T&P Valve)

releases large amounts of very hot wa-

ter, it is likely due to a shorted hea ng

element, or more rarely a non func on-

ing thermostat, or the thermostat does

not ﬁ t snuggly against the tank. Very

high water temperatures can also cause

the Energy Cut Oﬀ (ECO) to trip (see

page 22). Turn power oﬀ un l this

problem is ﬁ xed.

Low Water Pressure

Check both the cold and hot water at a

sink to determine if the lower pressure

is only on the hot water side. If both hot

and cold faucets have low pressure, call

your local water u lity. If the low pres-

sure is only on the hot water side, the

primary causes of this are:

• Melted heat traps or dip tube. Sol-

dering copper pipes while they are

connected to the water heater can

melt the heat traps inside the hot and

cold water connec ons or the dip tube

(cold water side). Melted heat traps or

a melted dip tube can restrict the ﬂ ow

of hot water. If that’s the case, replace

the heat traps or dip tube.

• Par ally closed supply valve. Open the

water heater’s supply valve fully.

TROUBLESHOOTING

24 • Residen al Electronic Thermostat Electric Water Heater Use and Care Guide

TROUBLESHOOTING

Drips from T&P Relief

Valve Discharge Pipe

A small amount of water dripping from

the Temperature and Pressure (T&P)

Relief Valve usually means the home’s

water pressure is too high or you need

a properly sized and pressurized Ther-

mal Expansion Tank. Refer to Step 1 in

the Installa on sec on of this manual

for more informa on. A large amount

of hot water coming from the T&P

discharge pipe may be due to the tank

overhea ng.

WARNING! Do not cap or plug the

T&P relief valve or discharge pipe, and

do not operate the water heater

without a func oning T&P Relief Valve

- this could cause an explosion.

Water pressure too high. High water

pressure can cause the T&P Relief

Valve to drip. Install a Pressure Reduc-

ing Valve (PRV) on the main cold water

supply line. Adjust the PRV to between

50 and 60 psi.

Thermal Expansion Tank. Install a

Thermal Expansion Tank. If a Thermal

Expansion Tank is already installed and

the T&P Relief Valve discharge pipe

drips, the Thermal Expansion Tank may

be pressurized to the wrong pres-

sure or the internal bladder may be

defec ve. Refer to the instruc ons that

came with the Thermal Expansion Tank

for more informa on.

Debris. In rare cases, debris can s ck

inside the T&P Relief Valve preven ng

the valve from sea ng fully. In that

case, the T&P Relief Valve discharge

pipe will drip. You may be able to clear

debris from the T&P Relief Valve by

manually opera ng the valve, allow-

ing small quan  es of water to ﬂ ush

out the debris. Refer to the T&P Relief

Maintenance sec on of this manual.

WARNING! When manually operat-

ing the temperature-pressure relief

valve, make sure that no one is in

front of or around the discharge out-

let. The water may be extremely hot

and could cause severe burns. Also

ensure that the water discharge will

not cause property damage.

If the water pressure is between 50

and 60 psi, a Thermal Expansion Tank

is installed and properly pressurized,

and the valve has been cleared of any

debris, and it s ll drips, the valve may

be broken—have a qualiﬁ ed person

replace the T&P relief valve.

Water Odor

Harmless bacteria normally present in

tap water can mul ply in water heat-

ers and give oﬀ a “ro en egg” smell.

Although elimina ng the bacteria that

causes “smelly water” with a Chlorina-

 on system is the only sure treatment,

in some cases, the standard anode

rod that came with your water heater

can be replaced with a special zinc

anode rod which may help reduce or

eliminate the odor. Contact a qualiﬁ ed

person.

NOTE: To protect the tank, an anode

rod must be installed in the water

heater at all  mes or the warranty is

void.

In cases where the “ro en egg” smell

is pronounced, you can raise the tank

temperature to 140°F in order to re-

duce bacteria growth in the tank.

WARNING! Because higher

temperatures increase the risk of

scalding, if you set the thermostat(s)

higher than 120°F, Thermosta c

Mixing Valves at each point-of-use are

par cularly important (see page 4).

TROUBLESHOOTING

Residen al Electronic Thermostat Electric Water Heater Use and Care Guide • 25

MAINTENANCE

Rou ne Maintenance

Rou ne maintenance will help your

water heater last longer and work more

eﬃ ciently. If you can’t perform these

rou ne maintenance tasks yourself,

contact a qualiﬁ ed person.

Water Heater Maintenance

A er the ﬁ rst six months, drain and

ﬂ ush the water heater and inspect the

anode rod. Depending on the hard-

ness of your water, repeat this process

at least annually, or more frequently if

needed. From  me to  me you may

need to replace a hea ng element or

the electronic thermostat. All three

maintenance tasks are described below.

Draining and Flushing the

Water Heater

Tap water contains minerals that can

form lime deposits on hea ng elements

or sediment in the bo om of the tank.

The amount of lime deposits or sedi-

ment depends on the hardness of your

tap water. The rate at which sediment

builds up depends on water quality and

hardness in your area, the tempera-

ture se ngs, and other variables. We

recommend draining and ﬂ ushing the

water heater a er the ﬁ rst six months

of opera on to determine the amount

of sediment build up. Draining sedi-

ment extends the life of the tank, heat-

ing elements, and drain valves.

• In areas with very hard water, remove

and check the hea ng elements

whenever you drain the tank. If you

have heavy lime deposits on hea ng

elements, you will need to replace

them more o en.

• Sediment may form large masses that

can prevent the tank from draining.

Have a qualiﬁ ed person use a de-liming

agent suitable for potable water to

remove the sediment buildup.

• In most cases, it is easier and cheaper

to replace lime-encrusted elements

than trying to remove heavy lime

deposits.

To drain and ﬂ ush the tank:

Locate the water heater’s

circuit breaker and turn it OFF

(or remove the circuit’s fuses).

Figure 26 - Circuit Breaker

Open a hot water faucet and

let the hot water run un l it is

cool.

Figure 27 - Water Faucet

WARNING! Be sure the water runs

cool before draining the tank to reduce

the risk of scalding.

Connect a garden hose to the

drain valve and place the other

end of the hose in a drain,

outside, or in buckets.

Turn the cold water supply

valve OFF.

Open the drain valve on the

water heater.

Figure 28 - Drain Valve

Open a hot water faucet to

help the water in the tank

drain faster.

NOTICE: DO NOT turn electrical power

back on unless the tank is completely

full of water.

Remove and inspect the anode

rod (see Repair Parts Illustra-

 on on back cover for loca on

of the anode rod). Replace the anode

rod if it is depleted. Turn power oﬀ . Run

hot water un l it’s cool. Turn cold water

supply valve oﬀ . Open a hot water

faucet to depressurize tank. Locate and

remove the black plas c cover marked

“Anode Rod”. Use a “key hole” saw or

similar tool to remove the foam

insula on covering the anode rod. Once

the anode rod is exposed, use a 11/16”

socket wrench with an extension to

remove it. Inspect the anode rod and

replace if depleted. Apply thread

sealant tape or pipe joint compound

and reinstall the anode rod  ghtly. It is

not necessary to replace the foam

removed to access the anode. Turn cold

water supply valve on. When hot water

runs full, close hot water faucet. Check

for leaks and repair if necessary. Turn

power on.

Figure 29 - Anode Rods from new (top) to partially

depleted (middle) to fully depleted (bottom).

Anode Rod. The anode rod is a sacriﬁ cial

metal rod that helps reduce corrosion

and premature failure (leaks) in the tank.

The anode rod is a consumable item.

Inspect the anode rod a er the ﬁ rst six

26 • Residen al Electronic Thermostat Electric Water Heater Use and Care Guide

MAINTENANCE

months of opera on when you drain and

ﬂ ush the tank. Replace the anode rod if

it is substan ally worn out or depleted.

Therea er, inspect the anode rod an-

nually or more frequently if needed. If

you use a water so ener, your anode

rod will deplete faster than normal.

Inspect the anode rod more frequently,

replacing the anode rod as needed.

Obtain new anode rods from your local

plumbing supplier or have a qualiﬁ ed

person replace it. (Anode rods are a

consumable item and are not covered

under warranty).

If the sediment was present

when the tank was drained,

ﬂ ush the tank by opening the

cold water supply valve and le ng the

water run un l no more sediment

drains from the tank. Close the drain

valve when you are done.

NOTICE: Do not turn power back on

un l the tank is completely full of wa-

ter. For complete instruc ons on ﬁ lling

the tank, follow Step 8 in the Installa-

 on sec on.

Reﬁ ll the tank by opening the

cold water supply valve. Make

sure a hot water faucet is

open and the drain valve is closed.

Allow the hot water to run full for at

least three minutes to make sure the

tank has all the air removed and is

completely full of water. Failure to

perform this step can ac vate the

Dry-Fire diagnos c code. Once you are

certain the tank is completely full of

water, close the hot water faucet.

Restore power to the water

heater. It may take two hours

for the tank to heat up.

Replacing the Hea ng Element

WARNING! Working on an ener-

gized circuit can result in severe injury

or death from electrical shock. Turn

power oﬀ . Check wires with a non-

contact circuit tester to make sure

power is oﬀ . When you are ﬁ nished,

be sure all covers are secured to

reduce the risk of ﬁ re and electric

shock.

If you are not comfortable replacing a

hea ng element or thermostat your-

self, have this work done by a qualiﬁ ed

person. To replace the hea ng ele-

ment, you’ll need the following tools

and supplies:

Figure 30 - Non-Contact Circuit Tester

• Always turn power OFF and check

the power wires with a non-contact

circuit tester before working on the

water heater.

Figure 31 - Heating Element (with gasket)

• Check your water heater’s data plate

for the correct wa age and voltage.

Hea ng elements are available at

your local plumbing supplier.

Figure 32 - Element Wrench

• Some regular sockets (1 1/2 inch)

may work, but regular sockets are

o en beveled and may slip. Inexpen-

sive element wrenches are available

at your local plumbing supplier.

• Garden hose to drain the tank

• Hand dishwashing soap to lubricate

the gasket

• A clean cloth to clean the threaded

opening

• A ﬂ at blade and a Phillips screwdriver

Steps for Replacing the Hea ng

Element:

NOTE: A diagnos c code (Pg.20) should

indicate if the upper or lower element

has failed.

Turn the power OFF at the

circuit breaker or remove fuses.

Turn the power OFF at the

circuit breaker or remove fuses.

Figure 33 - Circuit Breaker

Open the electrical junc on

box on top of the water

heater. Using a non-contact

circuit tester, check the power wires to

make certain the power is OFF.

Figure 34 - Non-Contact Circuit Tester

Open a hot water faucet and

let the hot water run un l it is

cool.

Figure 35 - Water faucet

MAINTENANCE

Residen al Electronic Thermostat Electric Water Heater Use and Care Guide • 27

WARNING! Be sure the water runs

cool before draining the tank to reduce

the risk of scalding.

Connect a garden hose to the

drain valve and place the other

end of the hose in a drain or

outside (or use buckets). Turn OFF the

cold water valve that supplies the water

heater. Open the drain valve on the

water heater. Opening a hot water

faucet will help the tank drain faster.

Remove the upper control

assembly or lower access

panel on the water heater, and

then fold back the insula on and

remove the plas c element/thermostat

cover.

Screw Location

Figure 36 - Control Assembly

With the tank drained and

power oﬀ , remove the power

wires from the element you

intend to replace.

Remove the bad element using

an element wrench.

Make sure the new element is

the correct replacement by

referring to the water heater’s

data plate for voltage and wa age

informa on.

Clean the threads in the tank

opening with a rag. Insert the

new element equipped with a

rubber gasket. NOTE: Use a drop of

hand dishwashing liquid to lubricate the

gasket to help avoid damaging the

gasket as it is being  ghtened. Tighten

with an element wrench.

NOTICE: Do not turn power back on un l

the tank is completely full of water. For

complete instruc ons on ﬁ lling the tank,

follow Step 8 in the Installa on sec on.

Reﬁ ll the tank by opening the

cold water supply valve. Make

sure a hot water faucet is open

and the drain valve is closed. Allow the

hot water to run full for at least three

minutes to make sure the tank has all

the air removed and is completely full

of water. Failure to perform this step

can ac vate the Dry-Fire diagnos c

code. Once you are certain the tank is

completely full of water, close the hot

water faucet.

Figure 37 - Drain Valve

Check the newly installed

element for leaks. If a leak is

present,  ghten the element

un l the leak stops. If you cannot stop

the leak, drain the tank and remove the

element. Inspect the gasket for dam-

age. If the gasket is damaged, replace

the gasket and re-install the element.

Once the element is success-

fully installed and there are no

leaks, replace the power wires,

thermostat cover, insula on, and

control assembly or access panel. Make

sure all wire connec ons are  ght.

Replace the cover on the electrical

junc on box.

Restore power to the water

heater. It may take two hours

for the tank to heat up.

Replacing the Electronic Thermostat

WARNING! Working on an ener-

gized circuit can result in severe injury

or death from electrical shock. Turn

power oﬀ . Check wires with a non-

contact circuit tester to make sure

power is oﬀ . When you are ﬁ nished, be

sure all covers are secured to reduce

the risk of ﬁ re and electric shock.

To replace the thermostat, you’ll need

the following tools and supplies:

• A non-contact circuit tester. Always

turn power OFF and check with a non-

contact circuit tester before working on

the water heater.

Lower

Thermostat

Upper

Thermostat

Figure 38 - Upper and Lower Thermostats

• Replacement thermostats are avail-

able and may be ordered from the

Repair Parts List on page 30 of this

manual.

• A business card to check the gap be-

tween the thermostat and the tank

• Tape and a permanent marker to

mark the wires

• A ﬂ at blade and a Phillips screwdriver

Steps for Replacing the

Thermostat:

Turn the power OFF at the

circuit breaker or remove fuses.

NOTICE: It is not necessary to drain the

tank to replace a thermostat.

Open the electrical junc on box

on top of the water heater. Using

a non-contact circuit tester, check

the power wires to make certain the

power is OFF.

MAINTENANCE

28 • Residen al Electronic Thermostat Electric Water Heater Use and Care Guide

MAINTENANCE

Figure 39 - Non-Contact Circuit Tester

Remove the upper control

assembly or lower access

panel on the water heater and

carefully fold back the insula on and

plas c element/thermostat cover.

The replacement electronic

thermostat should match the

original electronic thermostat.

Mark the wires with tape so

you’ll know how to put them

back on.

Disconnect the wires from the

bad electronic thermostat and

remove the electronic ther-

mostat from the metal moun ng clip.

Install the new electronic

thermostat in the metal

moun ng clip.

Make sure the new thermo-

stat ﬁ ts snugly against the

tank. You should NOT be able

to slip a business card between the

ECO and tank. If needed, you can bend

the thermostat moun ng clip un l the

electronic thermostat ﬁ ts  ghtly against

the tank.

A ach the wires following the

wiring diagram on the water

heater’s label. Make sure all

wire connec ons are  ght.

Replace the plas c element/

thermostat cover, insula on,

and upper control assembly or

lower access panel.

Replace the cover on the

electrical junc on box.

Restore power to the water

heater. It may take two hours

for the tank to heat up.

T&P Relief Valve Maintenance

Read and follow the opera ng and

annual maintenance instruc ons

provided by the manufacturer of the

T&P Relief Valve (yellow label a ached

to T&P Relief Valve). If no label is at-

tached to the T&P Relief Valve, follow

the instruc ons in this sec on. Miner-

als in the water can form deposits

that cause the valve to s ck or create

blocked passages, making the T&P

Relief Valve inopera ve. Follow these

guidelines:

• At least annually, operate the T&P

Relief Valve manually to ensure the

waterways are clear and the valve

mechanism moves freely (above).

Before opera ng the valve manually,

check that it will discharge in a place

for secure disposal. If water does

not ﬂ ow freely from the end of the

discharge pipe, turn OFF the power

to the water heater. Call a qualiﬁ ed

person to determine the cause.

Figure 40 - T&P Relief Valve

WARNING! Hot water will be

released. Before opera ng the T&P

relief valve manually, check that it will

discharge in a safe place. If water does

not ﬂ ow freely from the end of the

discharge pipe, turn the power to the

water heater OFF. Call a qualiﬁ ed

person to determine the cause.

• At least every ﬁ ve years, have a quali-

ﬁ ed person inspect the T&P Relief

Valve and discharge pipe. Damage

caused by corrosive water condi ons,

mineral deposits, or other problems

can only be determined when a qual-

iﬁ ed person removes and inspects

the valve and its components.

• Note that a dripping T&P Relief Valve

is usually caused by the home’s water

pressure being too high or the lack

of a Thermal Expansion Tank. If your

T&P Relief Valve drips, see page 24.

MAINTENANCE

DIAGRAMS

Thermostat Wiring Diagram

JUNCTION BOX

BLACK RED

BLACK

RED

BLACK

BLUEYELLOW

HI-TEMP

LIMIT

SWITCH

UPPER

THERMOSTAT

LOWER

THERMOSTAT

UPPER

HEATING ELEMENT

LOWER HEATING

ELEMENT

UPPER

THERMOSTAT

UPPER

ELEMENT

LOWER

THERMOSTAT

LOWER

ELEMENT

120

1500*

2000

2500

3000

3500

4000

4500

5000

5500

WATT

LOAD

BRANCH CIRCUIT SIZING GUIDE

Based on N.E.C. NFPA NO. 70 - 1999

208

240

Recommend

Over Current

Protection Rating

120

208

240

Copper Wire Size

AWG Based on

N.E.C.

Table 310 - 16

Wattages less than 1500 may be wired 14 gage with a maximum

15 amp protection.

REDBLACK

HI-TEMP

LIMIT

SWITCH

BLACK

RED

YELLOW

ELECTRONIC

CONTROL HARNESS

GROUND

LOW VOLTAGE

HARNESS

SLEEVED

(5) WIRES

BLACK

SLEEVED

(5) WIRES

29 • Residen al Electronic Thermostat Electric Water Heater Use and Care Guide

DIAGRAMS

Repair Part Illustra on

REPAIR PARTS

ITEM No. PARTS DESCRIPTION

1 CONTROL ASSEMBLY

2 UPPER THERMOSTAT COVER

3 UPPER ELEMENT

4 ELEMENT GASKET

5 UPPER THERMOSTAT/ECO

6 ACCESS DOOR

7 LOWER THERMOSTAT COVER

8 LOWER ELEMENT

9 LOWER THERMOSTAT

10 DRAIN VALVE

11 TEMPERATURE AND PRESSURE RELIEF VALVE

12 JUNCTION BOX COVER

13 HEAT TRAP/OUTLET COMBINATION

14 NIPPLE W/HEAT TRAP

15 DIP TUBE (INCLUDES NIPPLE AND HEAT TRAP)

16 ANODE ROD

Repair Parts

Repair parts may be ordered through your plumber,

local distributor, home improvement center, or by calling

1-800-821-2017. When ordering repair parts, always

give the following information:

1. Model, serial and product number

2. Item number

3. Parts description

Repair Parts List

Legend

Special anode rod (See “Anode Rod/Water Odor” section)

Temperature and Pressure Relief Valve is required, but may not

be factory installed.

Specify element type when ordering

AO Smith EETU-50 100 ProLine® Grid-Capable 50-Gallon Tall Electric Tank Water Heater

Product's Documents

Manual - ProLine® Grid-Capable Electric Manual (100354544)

Specifications

AO Smith EETU-50 100 Questions and Answers