Lochinvar HPSA080KD 210 80-Gallon Smart Hybrid Electric User Manual

100345706_2000603095_REV.B

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.

LOW LEAD

CONTENT

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 di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.

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

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

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

installa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 re, scalding, electric shock,

and explosion, causing serious injury or death.

AHRI Cer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.

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

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

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

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

Operaon ............................................................................. 19

Troubleshoong ................................................................... 25

Maintenance ........................................................................ 32

Diagrams............................................................................... 38

Repair Parts .......................................................................... 39

Hybrid Electric

Heat Pump Water Heater

August, 2022

COMPLETED INSTALLATION (TYPICAL)

2 • Residenal Electric Water Heater Use and Care Guide

Water shut-o

valve

Cold water line

Thermal

expansion tank

Drain pan discharge pipe

Drain

Leak detection sensor

Drain valve

Drain pan

Lower element

Upper element

and ECO

Electrical

junction

box

Hot water line

Condensate line (supplied)

Condensate drain

Control panel

T&P discharge pipe

(Do not cap or plug)

T&P relief valve

Intake air

Exhaust air

Optional side outlet (capped)

Optional side inlet (capped)

Intake lter

1/2” (13mm) Conduit Opening

Notes:

1) If copper piping is used, then unions must be dielectric at inlet and outlet.

2) Plumb piping to desired inlet and outlet, either top or side (not in combination), and cap unused inlet and outlet to avoid

water leaks.

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

IMPORTANT SAFETY INFORMATION

SAFETY

Important informaon to keep

Fill out this secon and keep this

manual in the pocket of the water heat-

er for reference.

Date Purchased:

Model number:

Serial number:

Maintenance performed:* Date:

*Drain and ush tank, clean air lter,

clean condensate pan, and remove and

inspect anode rod aer 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.

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

potenal physical injury hazards. Obey all safety messages

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

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 relat-

ed to physical injury.

Read and follow all safety messages and instrucons in this

manual.

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

To 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 juncon box,

behind the access doors and

inside the top shroud can result in

severe injury or death from the

electrical shock.

• Disconnect power by opening the

circuit breaker or removing the

fuses before installing or servicing.

• Use a non-contact circuit tester to

conrm that power is o before

working on or near any electrical

parts.

• Replace the juncon box cover and

access doors aer 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.

• Unit is top heavy, use an appliance

dolly (with strap) to move the water

heater.

RISKS DURING OPERATION

Scalding Risk

This water heater

can make water hot

enough to cause

severe burns instantly, resulng in

severe injury or death.

Feel water before bathing or

showering.

To reduce the risk of scalding,

install Thermostac Mixing Valves

(temperature liming valves) at

each point-of-use. These valves

automacally mix hot and cold

water to limit the temperature at

the tap. Mixing valves are available

from your local plumbing supplier.

Follow manufacturer’s instrucons

for installaon and adjustment of the

valves.

The Control Assembly on this

water heater has been factory set

to approximately 120°F/49°C to

reduce the risk of scalding. Higher

temperatures increase the risk of

scalding, but even at 120°F/49°C,

hot water can scald. If you choose a

higher temperature, 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 more information about changing

the factory thermostat setting(s), refer

to the “Adjusting the Temperature”

section in this manual (see page 18).

Regardless of the water heater

Control Assembly setting, 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 30°F/15°C degrees hotter

than the thermostat setting. This

temperature variation is the result

of your usage pattern and is not a

malfunction.

• Water temperature will be hotter if

someone adjusted the thermostat(s)

to a higher setting.

• Problems with the thermostat(s),

or other malfunctions may result

in higher than expected water

temperatures.

• If the water heater is in a hot

environment, the water in the

tank can become as hot as the

surrounding air, regardless of the

thermostat setting.

• If the water supplied to the water

heater is pre-heated (for example,

by a solar water heating system)

the temperature in the tank may

be higher than the water heater’s

thermostat setting.

To reduce the risk of unusually hot

water reaching the fixtures in the

house, install Thermostatic Mixing

Valves at each point-of-use.

SAFETY

IMPORTANT SAFETY INFORMATION

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

IMPORTANT SAFETY INFORMATION

SAFETY

If anyone in your home is at particular

risk of scalding (for example, the

elderly, children, or people with

disabilities) or if there is a local code

or state law requiring a certain water

temperature at the hot water tap,

then these precautions are particularly

important.

According to the national standard

American 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 to avoid scalds.

Properly adjusted Thermostatic Mixing

Valves installed at each point-of-use

allow you to set the tank temperature

to a higher setting without increasing

risk of scalds. A higher temperature

setting 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/60°C) also kill

bacteria that cause a condition known

as “smelly water” and can reduce the

levels of bacteria that cause water-

borne diseases.

Water Contamination Risk

Do not use chemicals that could

contaminate 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

seriously injure or kill people:

• Do 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 element access door covers are

in place. These covers keep debris

from entering and potentially being

ignited, and help keep any internal

fires from spreading.

• Keep the water heater from

becoming wet. Immediately shut

the water heater off and have it

inspected by a qualified person if you

find that the wiring, thermostat(s)

or surrounding insulation have been

exposed to water in any way (e.g.,

leaks from plumbing or leaks from

the water heater itself can damage

property and could cause a fire risk).

If the water heater is subjected to

flood conditions 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

17. Use 10 gauge solid copper wire.

Use a UL listed or CSA approved

strain relief. Connect the ground wire

to the green ground screw.

Explosion Risk

High temperatures and

pressures in the water

heater tank can cause an

explosion resulting in property

damage, serious injury or death. A new

Temperature and Pressure (T&P) Relief

Valve is included with your water

heater to reduce the risk of explosion

by discharging hot water. Additional

temperature and pressure protective

equipment may be required by local

codes.

A nationally recognized testing

laboratory maintains periodic

inspection of the valve production

process and certifies 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

rating of the water heater as stated on

the rating 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

CAUTION! 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

flammable. 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 flame

or other ignition source near the

faucet while it is open.

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

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 if

required.

Flexible Tubing

Condensate Drain

Ø 5/8” ID

Barbs For

Ø 5/8” ID

Plastic Hose

Figure 4 - Condensate drain connection

Review all of the instrucons

before you begin work. If you

aren’t sure that you can

safely and properly do this work

yourself, call a qualied person of

your choice, such as a licensed

plumber or electrician, to have the

work done. 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

Interna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

water 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 connecons (Figure 1) for

the cold and hot water pipes

• For homes plumbed with plasc

pipe, use threaded connectors

suitable for the speci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 ngs that

don’t require soldering (Figure 1).

Compression ngs are easier to

install than soldering copper pipes

• Thread sealant tape or pipe joint

compound approved for potable

water

• Tools to make electrical connecons

(for example, screwdrivers and wire

strippers)

• Non-Contact circuit tester to check

for power (Figure 2)

• Water Pressure Gauge (Figure 5 on

page 7)

Recommended Accessories:

• Suitable drain pan (Figure 7 on page

• Shut-o device (kit available)

• Pressure Reducing Valve (Figure 3)

• Thermal Expansion Tank (Figure 6 on

page 7)

• Point-of-use Thermostac Mixing

Valves (Figure 8 on page 8)

GETTING STARTED

Residenal 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 Installa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 make any other changes to bring

your home up to the latest code

requirements.

Use this checklist 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

ocial for more informaon.

✓

Water Pressure

We recommend checking your

home’s water pressure with a pressure

gauge (Figure 5). Most codes allow a

maximum incoming water pressure

of 80 psi/551 kpa. We recommend a

working pressure no higher than

50-60 psi/345-414 kpa.

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

occur at night).

Figure 5 - 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 Reducing

Valve (PRV) on the main incoming

(cold) water supply line and adjust the

water pressure control 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 available at your local plumbing

supplier.

BACKGROUND: Over the years,

many ulies have increased water

supply pressures so they can serve

more homes. In some homes today,

pressures exceed 100 psi/689 kpa.

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 appliances 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 6). We

recommend installing an expansion

tank if your home does not have one.

Codes require a properly pressurized,

properly sized Thermal Expansion

Tank in all homes that have backow,

check or pressure reducing valves (see

illustraon on inside front cover).

Figure 6 - A Thermal Expansion Tank helps

protect 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 according 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 installaon details.

BACKGROUND: Water expands when

heated, and the increased volume

of water must have a place to go, or

thermal expansion will cause large

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

increases in water pressure (despite

the use of a Pressure Reducing

Valve on the home’s main water

supply line). The Safe Drinking Act

of 1974 requires the use of backow

preventers and check valves to restrict

water from your home reentering

the public water system. Backow

preventers 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 occasionally runs for no

apparent reason (usually brie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 re risk.

• Install the provided leak detecon

sensor (see “Step 15” on page 18).

An automac cold water shut-o

valve is also available for purchase

(kit p/n 100345338). If an automac

cold water shut-o valve has been

purchased, see “Step 9” on page 13

for installaon instrucons. These

devices can detect water leaks and

can shut o the water heater’s

water supply if a leak occurs.

Figure 7 - A suitable drain pan piped to an

adequate drain can help protect flooring from

leaks and drips.

• Install a suitable drain pan (available

at your local plumbing supplier)

under the water heater (Figure 7) 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

2” (50 mm) 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” (45 mm).

✓

Water Tempera-

ture Regulaon

Figure 8 - Thermostatic Mixing Valves installed

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

Install Thermostac Mixing Valves

(Figure 8) to regulate the temperature

of the water supplied to each point-

of-use (for example, the kitchen sink,

bathroom sink, bath and shower).

Consult the valve manufacturer’s

instrucons or a qualied person.

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 and

Figure 8).

BACKGROUND: A Thermostac Mixing

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 xtures. If you

are not sure if your plumbing system

is equipped with properly installed

and adjusted Thermostac Mixing

Valves, at each point of use where

hot water is used, contact a qualied

person for more informaon.

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

adequate oor drain or external to

the building (Figure 7).

• In an area that will not freeze.

• In an area that is suitable for

installing the water heater vercally

and on a level surface.

• Installed where a typical home

appliance sound would not cause a

disturbance.

• Not used for space heang.

NOTICE: Water heater must be level!

INSTALLATION

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

INSTALLATION

The locaon has adequate

space (clearances) for periodic

servicing. For opmal water

heater eciency in unvented

applicaons, the unit must have

unrestricted airow and requires a

minimum installaon space of 450 ³

(12.7 m³). As an example, a room that

has an 8  (2.4 m) tall ceiling and is

7-3/4  (2.3 m) long by 7-1/4  (2.2 m)

wide would contain 450 ³ (12.7 m³).

NOTICE: This Heat Pump Water Heater

may be located within a required

minimum of 6”/152 mm clearance

from the front side and 12”/305 mm

clearance from the top of the water

heater. However, for future service

consideraons, a minimum of 3 /.9 m

from any obstrucon on the front side

is recommended.

The oor can support the

weight of a full water heater.

Capacity Filled Weight (lbs.)

50 Gallon 573

66 Gallon 796

80 Gallon 921

Your area is not prone to

earthquakes. If it is, use

special straps as required by

local building codes.

NOTICE: The state of California

requires bracing, anchoring or

strapping the water heater to avoid

its moving during an earthquake.

To 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,

ooding, or other risks.

Vehicle

Stop

Drain

Pan

Figure 9 - In a garage, install a vehicle stop to

avoid water heater damage.

Avoid locaons such as acs,

upper 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

accordance with this manual’s

instrucons. Inspect the drain pan,

pipes, and surrounding area regularly

and 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.

The unit cannot be placed into

any type of closet or small

enclosure (less than 450 ³),

unless adequate provisions are made

for air exchange (vented or louvered

doors, wall grilles, ducng, etc.). Wall

grilles shall be a minimum size of 22

inches by 6 inches, or provide the

equivalent area of airow (a minimum

net free area of 130 in²).

For small enclosures with a minimum

installaon space of 84 ³ to 449 ³

(2.3 m³ to 12.7 m³), the following

methods of venlaon are acceptable:

• A fully louvered door.

• One wall grille located a minimum

of 12 inches from the ceiling, and a

second wall grille located a minimum

of 12 inches from the oor.

• One wall grille located a minimum

of 12 inches from the ceiling, and

an undercut door providing 3/4” of

clearance (or a minimum net free

area of 18 in²).

To ensure opmal

performance and

serviceability, a minimum

clearance of 6”/152 mm must be

maintained from the front side and

12”/305 mm from the top for access

and serviceability.

Water heaters located in

uncondioned spaces (i.e.,

garages, basements, etc.) may

require the water piping, condensate

piping, and drain piping to be insulated

to guard from freezing.

The air lter, condensaon

drain and controls must be

easily accessible for operaon

and service.

The site locaon must be free

from any corrosive elements

in the atmosphere such as

sulfur, uorine, sodium and chlorine.

These elements are found in aerosol

sprays, detergents, bleaches, air

fresheners, paint and varnish

removers, refrigerants and many other

household products. In addion,

excessive dust and lint may aect the

operaon of the unit (see “Air Filter

Maintenance” on page 36).

The ambient air temperature

must also be considered when

installing this unit. In Heat

Pump Mode, the air temperature

needs to be above 37°F/3°C and below

120°F/49°C for heat pump operation. If

the air temperature falls outside these

upper and lower limits, the electrical

elements will activate to meet the hot

water demand. In this scenario, the

heat pump will not operate in either

Heat Pump Mode or Hybrid Mode.

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

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 quali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

juncon box access panel.

Using a non-contact circuit tester,

check the wiring to make certain the

power is OFF.

WARNING! Working on an

energized 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 10 - 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 the 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 cannot get the tank to

drain, contact a qualied person.)

Turn the cold water supply

valve OFF.

Open the drain valve on the

water heater.

Figure 11 - 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 12 - 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 the water

heater. Failure to do so can result in

back or other injury.

INSTALLATION

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

INSTALLATION

Step 4:

Installing the New

Water Heater

Completely read all

instrucons before beginning.

If you are not sure you can

complete the installaon, seek

assistance from any of the following

sources:

• Schedule an appointment with a

qualied person to install your water

heater.

• Call our Technical Assistance Hotline

which is listed on the water heater’s

warranty sheet.

Install a suitable drain pan (if

required) 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 damage

which may occur from condensaon or

leaks in the piping connecons or tank.

The drain pan must be at least

2” (50 mm) wider than the diameter

of the water heater. Install the drain

pan so the water level is limited to a

maximum depth of 1-3/4” (45 mm).

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 separate

drain (and not into the drain pan).

• There is adequate space to install

proper condensate drain tubing.

• There is adequate access and space

around the water heater for future

maintenance. A minimum clearance

of 6”/152 mm must be maintained

from the front side of the water

heater.

• Unit is level to allow proper

condensate drainage. An unlevel unit

may lead to condensate draining

improperly, resulng in property

damage.

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 (the 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.

Step 5:

Connecng the

Condensate Pump

When Required

NOTICE: If no oor drain is available,

or the drain is above the level of the

condensate line, a condensate pump

must be installed.

Follow condensate drain pump

manufacturer’s instrucons for

installaon.

Step 6:

Connecng the

Condensate Pump

Oponal Overow

Shut-O Switch

Locate the wiring loop next to

the condensate drain

connecon and remove label

(Figure 13). Cut the loop and strip

insulaon o the two ends (Figure 14).

Condensate

Pump Wiring

(Loop located

close to Drain

Connection)

Condensate

Drain Connection

REMOVE

Figure 13 - Condensate Pump wiring.

Condensate Pump Wiring Loop

(Loop Located Close to the Drain Connections)

Wires From

Water Heater

Wires to Condensate

Pump Overflow

Shut Off Switch

Figure 14 - Wiring Loop for connection to

Condensate Pump.

Measure the distance from

the wiring loop to the

condensate pump. Cut two 22

AWG wires to correct length and strip

the insulaon at both ends.

Connect the two 22 AWG

wires to the two wires on the

water heater using wire

connectors or other approved means

to make the power connecons.

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

Connect the free ends of the

two 22 AWG wires to the

shut-o switch on the

condensate pump in accordance with

the condensate pump manufacturer’s

recommendaons.

Step 7:

Install Condensate

Drain Line:

NOTICE: Barbed drain and exible

tubing for condensate drain line come

pre-installed from the factory.

• Flexible tubing must be used to

connect the condensate drain to a

suitable drain or condensate pump.

• Condensate drain line should be

installed in condioned areas

only. Install approved insulaon

on the condensate drain line to

prevent condensaon from forming

on the outside of the drain line.

Condensaon drain lines installed

in areas that are subject to freezing

temperatures should be wrapped

with a naonally recognized heat

tape. Install per manufacturer’s

instrucons.

• Do not connect condensate drain

line with other drain or discharge

lines into a single (common) pipe

or line. Each line (condensate drain

line, temperature and pressure relief

valve discharge pipe, etc.) should be

independently run to an adequate

drain.

• Slope the condensate drain line

toward the inside oor drain or

condensate pump.

• The condensate drain line and

connecons to the drain piping must

comply with all local codes.

• If a condensate pump is installed, it

should be wired to shut o the heat

pump in the event the condensate

pump fails or the oat switch in the

pump acvates (see “Connecng

the Condensate Pump Oponal

Overow Shut-O Switch” on page

11).

• Allow enough length on the 5/8” ID

exible plasc tubing (pre-installed

from the factory) to access an

adequate drain.

Step 8:

Connect the

Temperature 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” (19 mm) 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. Most homes use

copper water pipes, but some use

CPVC or cross-linked polyethylene

(PEX). Use ngs appropriate for the

type of pipe in your home. Do not use

any other type of pipe, such as PVC,

iron, exible plasc pipe, or any type

of hose.

Figure 15 - The T&P Relief Valve discharge pipe

must be installed properly and piped to an

adequate drain.

Terminate the discharge pipe

a maximum of 6” (15 cm)

above a 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.

Do not place any valve or

other restric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 discharge pipe. Do

not insert or install any reducer in the

discharge pipe.

INSTALLATION

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

INSTALLATION

Discharge

Pipe

Drain

Pipe

Condensate

Flextubing

Figure 16 - The end of the T&P Relief Valve dis-

charge pipe must stop no more than 6” (15 cm)

above a floor drain or outside.

Step 9:

Install Shut-O and

Tempering Valves

Install a manual shut-o valve

(available at your local

plumbing supplier) on the

cold water line that supplies the water

heater. Install the shut-o valve near

the water heater so that it is readily

accessible. Only use valves that are

compable with potable water. Use

only full-ow ball or gate valves. Other

types of valves may cause excessive

restricon to the water ow.

NOTICE: An automac cold water

shut-o valve is available for purchase

(see the “Repair Parts” secon of

this manual). This is to be installed

on the cold water line near the water

heater. Make sure the module cable

can be easily plugged into the Control

Assembly (within 30”/76 cm). See

included kit instrucons found with

the automac cold water shut-o valve

for further installaon instrucons.

Install Thermostac Mixing

Valves at each point-of-use

(for example, the kitchen sink,

bathroom sink, bath or shower).

Consult the valve manufacturer’s

instrucons or a qualied person.

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 and

Figure 8).

For water heaters that are fed

by a solar water heang

system (or any other pre-

heang system), always install a

Thermostac Mixing Valve or other

temperature liming device in the inlet

water supply line to limit water supply

inlet temperature to 120°F/49°C. Solar

water heating systems can supply

water with temperatures exceeding

170°F/77°C and may result in water

heater malfunction.

WARNING! Hot water provided

by solar heang systems can cause

severe burns instantly, resulng in

severe injury or death (see page 4).

Step 10:

Connect the Water

Supply

Determine the type of water

pipes in your home. Most

homes use CPVC or cross-

linked polyethylene (PEX). Use ngs

appropriate for the type of pipe in

your home. Do not use iron or PVC

pipe – they are not suitable for potable

water.

The water heater can be

plumbed to either the top or

side connecons, however,

only one opon shall be chosen

(neither top nor side connecons may

be used in combinaon). The unused

connecons must be capped with the

caps provided.

Connect the cold water supply

using 3/4 inch Naonal Pipe

Thread “NPT” to the BLUE

cold water connecon on either the

top or side of the water heater.

To avoid damaging gaskets in the ex

lines, use a second wrench at the hot

and cold nipples to counter torque

when installing or removing water

connecons. DO NOT overghten.

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 (available at your

local plumbing supplier). Dielectric

unions can help prevent corrosion

caused by ny electric currents

common in copper water pipes and

can help extend the life of the water

heater.

NOTICE: This water heater model

contains an oponal side outlet

connecon (J-tube) that has an

orientaon mark that must line up

with arrow (in a 12 o’clock posion).

Connect the hot water supply

using 3/4 inch NPT to the

corresponding RED hot water

connecon. Follow the same

connecon guidelines as for the cold

water supply.

IMPORTANT: DO NOT use top and side

connecons in conjuncon.

Plumb the water heater using the hot

and cold connecons located on the

top of the water heater, or the hot and

cold connecons located on the side of

the water heater.

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

IF YOU HAVE COPPER PIPES:

If your home has copper water

pipes, you can solder the water pipe

connecons or use compression

ngs which do not require

soldering. Compression ngs

are easier to install than soldering

pipe. Check with local plumbing

o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

using only 95/5 n-anmony

or equivalent solder. Aach the

threaded adapters to the water

heater’s connec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.

NOTICE: Do not over apply joint

compound.

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

eciency.

Double check to make sure

the hot and cold water pipes

are connected to the correct

hot and cold water ngs on the

water heater. Ensure unused hot and

cold connecons are plugged and

capped.

If needed, install (or adjust)

the home’s Pressure

Reducing Valve to 50-60 psi

and install a Thermal Expansion Tank.

Figure 17 - A Pressure Reducing Valve is

required if your home’s water pressure is above

80 psi.

Figure 18 - The Thermal Expansion Tank should

be pressurized with air to match the home’s

incoming water pressure.

Recirculang Loop

A recirculaon loop is somemes

provided in a hot water system where

it is desirable to have on demand hot

water at the xtures.

A smaller diameter size pipe with an

inline circulaon pump is plumbed

to a locaon near the furthest

xture and to a locaon near the

water heater. The pump can run

connuously or intermiently

circulang enough tempered water

to keep heat loss in the plumbing

system, during low or no demand,

within an acceptable limit.

A recirculaon loop in your home

provides on demand hot water

to your xtures quickly and helps

migate the amount of wastewater

sent down the drain while you wait,

but hot water may be connuously

owing through your plumbing

system. If your recirculaon pipes

are not insulated well enough to

prevent heat energy loss, then your

pipes will radiate heat throughout

the surrounding areas of your home.

The heat energy lost can cause your

heat pump water heater to work

connuously to maintain the heat in

the pipes.

This heat pump water heater is

programmed with proprietary

soware to ensure the water heater

operates at peak eciency. Demand

for hot water in the plumbing

system will draw hot water from the

tank causing a heang cycle as the

supply water temperature is much

cooler than the water in the tank.

You should consider alternaves to

installing a heat pump water heater

in conjuncon with a residenal

recirculaon loop to prevent

the water heater from running

connuously due to the lower input

INSTALLATION

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

INSTALLATION

of these types of units, potenally

causing a “no hot water” condion.

We do not recommend this heat pump

water heater for use in conjuncon

with recirculaon loop systems due

to the wide variety of applicaons

and variability in installaon and

performance of these systems. We

can provide the following guidance

that you may use to determine if this

heat pump water heater will operate

at peak eciency in your specic

applicaon.

If your recirculaon loop or pump is

designed to help provide on demand

hot water to sinks, showers, etc.,

and does not present a signicant

connuous heang load, this heat

pump water heater can generally be

used with on demand recirculaon

systems or with those specically

programmed to operate only for short

periods of the day when demand is

expected.

Energy savings from this heat pump

water heater could be signicantly

impacted depending on condions

associated with the specic

applicaon. The heat energy lost in a

recirculaon loop system can cause

your water heater to run excessively.

This heat pump water heater may not

be able to accommodate demand.

CHECK

VALVE

CIRCULATING

PUMP

HOT WATER

SUPPLY

COLD WATER

SUPPLY

CHECK

VALVE

HOT WATER

RETURN

HEAT PUMP

WATER HEATER

FIXTURE FURTHEST

FROM WATER HEATER

Figure 19 - Recirculation Loop Diagram

Step 11:

Ducng Requirements

(oponal)

Heat is absorbed from air entering

the intake side of the compressor

unit on top of the water heater and

transferred to the water inside the

storage tank. Cooler dehumidied

air exing the exhaust side of the

compressor unit is a normal by-product

of operaon. In unvented applicaons,

a minimum installaon space of

450 ³/12.7 m³ is required, however,

if adequate provisions are made for

air exchange, this water heater may

be installed in small enclosures with a

minimum installaon space of

84 ³/2.3 m³ (see “Verify that the

Locaon is Appropriate” secon in

this manual for more informaon

about required ducng and vented or

louvered doors). The factory installed

duct adaptors can be used to redirect

intake and/or exhaust air from or to

other locaons to permit installaon in

conned spaces, improve performance

and maintain comfort in occupied

areas of the home.

INSTALLATION LIMITATIONS

There are two duct adaptors; one

connects to the air exhaust side of the

top shroud (near the back of the water

heater) and one to the air intake side

of the top shroud (near the front of

the water heater). The two cannot be

interchanged. The inlet and outlet duct

adaptors on the water heater accept

8” diameter ducng. No addional

adaptors are needed.

7”, 6” and 5” diameter ducng is

supported. The table below lists the

total feet of ducng allowed. For duct

diameters smaller than 8” diameter,

the table takes into account the duct

reducer(s) and up to 10 feet of 8”

inch rigid ducng (two elbows) before

the duct reducer(s) at the unit. Duct

reducers must be installed within 10

feet (two elbows) of the unit or within

2 feet of the duct terminaon.

IMPORTANT: A minimum length of 12”

exible ducng (8” diameter) must be

installed between the duct adaptors

and any rigid ducng.

Air can be drawn from or expelled

to the outdoors, an ac space, or to

another room inside the home.

INSTALLATION CONSIDERATIONS

The compressor unit on the water

heater is disabled when the

temperature of the air owing to the

intake is lower than 37°F/3°C or higher

than 120°F/49°C. These operational

parameters must be considered when

determining if a location to duct air

from/to will be suitable.

NOTICE: If the compressor unit is

disabled for long periods of me due

to air intake temperature being too

hot or too cold, the potenal energy

savings a heat pump water heater is

able to provide may be signicantly

reduced.

AIR INTAKE

Outdoor air temperatures will oen

be lower than 37°F/3°C in many

regions during fall and winter months.

Attic temperatures will often exceed

120°F/49°C in many regions during

spring and summer months. For

units installed in conditioned spaces,

ducting outdoor air to the intake of

the unit may place additional load on

space heating and cooling equipment

Duct Type / Diameter 8” 7” 6” 5”

Flexible 100’ 50’ 24’ —

Rigid 300’ 155’ 65’ 20’

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

unless the air from the exhaust is also

ducted to an alternate location.

Air being drawn from an alternate

location inside the home may cause

a negative pressure condition inside

that area. As a result, cold or hot air

from outdoors may be drawn into the

structure and place additional load

on the space heating and cooling

equipment.

AIR EXHAUST

The air exhaust from a unit installed

in a garage or any area where

solvents or other chemicals that

emit potenally harmful fumes are

stored or automobiles are located

must never be ducted to any other

space inside the building structure.

This would include all occupied and

unoccupied spaces such as acs or

basements. Potenally harmful fumes

and vapors from solvents and cleaners

or automobile exhaust gases could be

introduced into living spaces.

Cold air blowing from the air exhaust

into an alternate locaon inside the

home may cause cooling discomfort

and be objeconable. Cold air blowing

from the air exhaust into an alternate

locaon inside the home may place

addional load on space heang

equipment during fall and winter

months.

Ducng only exhaust air to an

alternate locaon may cause a

negave air pressure in the installed

space. As a result, cold or hot air

from outdoors may be drawn into

the structure and place addional

load on the space heang and cooling

equipment.

Step 12:

Ducng Installaon

(oponal)

Read each installaon step

and decide if you have the

necessary skills to install

intake and exhaust ducng to and

from the heat pump water heater.

Only proceed if you can safely

perform the work. If you are not

comfortable, have a qualied person

perform the installaon.

Aer the desired length of 8”

exible duct has been

determined, carefully cut

completely around and through the

duct insulaon jacket with a pair of

scissors. Using a pair of wire cuers,

cut the wire inside the core duct. Fold

the duct insulaon jacket back away

from the core duct.

Slide the core duct over the

air exhaust duct adaptor and

secure with a cable e. Seal

core duct with at least two wraps of

insulaon tape over cable e.

Slide duct insulaon jacket

back over the core duct and

the air exhaust duct adaptor.

Use insulaon tape to secure the duct

insulaon jacket to the air exhaust

duct adaptor. Addionally, secure duct

insulaon jacket with cable e. Repeat

procedure for the air intake duct

adaptor.

Add support to the duct work

as necessary with ducng

tube hooks or as required by

local codes. Special aenon must be

given to prevent large droops in the

duct work which could allow moisture

to pool.

The appropriate duct

terminaon shall be added to

the terminaon end of the

duct. This terminaon shall prevent

any debris or rodents from entering

the duct work and shall minimally

restrict airow through the ducng. In

addion, the terminaon shall be

designed to prevent rain from

entering the duct work if terminated

to the outside.

The ow area terminaon

must be at least 40 sq in. to

avoid overloading the heat

pump water heater fan.

Step 13:

Verify Connecons and

Completely Fill Tank

To remove air from the tank and allow

the tank to ll completely with water,

follow these steps:

Remove the ow restrictor 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 and ensure any

shut-o valves installed on

the cold water supply line are open.

Figure 20 - Fully open the cold water supply

valve (full-flow ball valve pictured above).

INSTALLATION

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

INSTALLATION

Open a hot water faucet and

allow the water to run unl it

ows with a full stream.

Let the water run full stream

for three full minutes.

Close the hot water faucet

and replace the ow restrictor.

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.

Step 14:

Make Electrical

Connecons

WARNING! Working on an

energized circuit can result in severe

injury or death from electrical shock.

NOTICE: Do not turn electrical power

on unless you are sure all of the air

is out of the tank and the tank is

completely full of water. Although this

water heater is equipped with “Dry-

Fire” protecon, be certain all 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

and the circuit is not energized.

This water heater requires a

208/240 VAC single phase 30

amp power supply, at 50Hz or

60Hz. Check the water heater’s data

plate (Figure 22) 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, and on page 38 of this

manual, for the correct electrical

connecons. Ensure that wire sizes,

type, and connecons comply with all

applicable local codes. In the absence

of local codes, follow NFPA-70 and the

current edion of the Naonal Electric

Code (NEC).

1/2” Conduit

Opening

Green

Ground

Screw

Green

Ground

Wire

Red Wire

Black Wire

Power Supply

Connector

Figure 21 - Connecting the electrical wires

(bottom cover to electrical junction box removed

for clarity).

If metal conduit is used for the

grounding conductor:

• The grounding electrode conductor

shall be 10 gauge solid copper wire.

The copper wire shall be of one

connuous length without a splice

or joint.

• Rigid metal conduit, intermediate

metal conduit, or electrical metallic

tubing may be used for the

grounding means if conduit or tubing

is terminated in ngs approved for

grounding.

• Flexible metal conduit or exible

metallic tubing shall be permied

for grounding if all the following

condions are met:

I. The length in any ground return

path does not exceed 6 feet/1.8 m.

II. The circuit conductors contained

therein are protected by

overcurrent devices rated at 30

amperes.

III. The conduit or tubing is terminated

in ngs approved for grounding.

For complete grounding details and

all allowable excepons, refer to the

current edion of the Naonal Electric

Code NFPA-70.

Figure 22 - The water heater’s electrical

requirements can be determined from the data

plate.

Remove the top and boom

covers on the electrical

juncon box on the side of

the water heater.

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. Use suitable wire

connectors or other approved means

to make the power connecons.

Replace the juncon box

covers and secure with the

screws provided.

WARNING! Be sure cover is secured

to reduce the risk of re and electric

shock.

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

Step 15:

Installing the Leak

Detecon Sensor

The Leak Detecon Sensor (LDS) does

not provide protecon against a water

leak, it only provides nocaon that

water is present in the locaon of the

sensor. When a leak is detected, the

Control Assembly will display an error

code accompanied by a ashing light

and audible signal. If the presence

of water is indicated, disconnect

power to the water heater, turn o

the incoming water and address the

source of the leak before returning

the unit to service. See included kit

instrucons found with the LDS for

detailed installaon instrucons.

Plug the LDS into the

connecon port next to the

lower element access panel.

Aach the LDS to the heater

or drain pan using the tape

on the back of the LDS.

Ensure the metal probes point down.

Use the included wire clamps

to organize the wires.

Step 16:

Adjusng the

Temperature

With the installaon steps completed,

you may adjust the water heater’s

temperature seng if desired.

Turn the electric power back

on. Remove/pull out the

baery protecve tab from

the le side of the Control Assembly.

Set the thermostat to the

desired temperature on the

Control Assembly (see

“Adjusng the Control Assembly’s

Operaonal Modes” on page 21). The

set point on this water heater has

been factory set to approximately

120°F/49°C to reduce the risk of scald

injury. You may wish to set a higher

temperature to provide hot water for

automac dishwashers or laundry

machines, to provide more hot water

capacity, and to reduce bacterial

growth. Higher tank temperatures

(140°F/60°C) kill bacteria that cause a

condion known as “smelly water”

and can reduce the levels of bacteria

that cause water-borne diseases.

WARNING! Higher temperatures

increase the risk of scalding, but even

at 120°F/49°C, hot water can scald

(see page 4 and Figure 23).

If you increase the water heater’s

temperature seng, install

Thermostac Mixing Valve(s) at each

point-of-use to reduce the risk of

scalding.

Figure 23 - Adjust Thermostatic Mixing Valves at

each point-of-use to 120°F/49°C or lower.

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 (beginning

on page 25).

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 in your home

(for example, the bathtub

faucet, shower, or lavatory sink) and

adjust the Thermostac Mixing Valves

as needed. If you are not sure how to

adjust the Thermostac Mixing Valve

sengs, or are not sure if you have

Thermostac Mixing Valves, contact a

qualied person.

Post Installaon

Review

Understand how to use the

Control Assembly to set the

various modes and funcons.

Hybrid Mode is the

recommended Operang

Mode. Understand the

various Operang Modes and which

mode may be best, based on ambient

temperature and hot water demands.

Understand the importance

of roune inspecon/

maintenance of the

condensate drain pan and line. This is

to prevent any possible drain line

blockage resulng in the condensate

drain pan overowing.

To maintain opmal

operaon, check, remove and

clean the air lter as needed.

The installaon Instrucons

and Use and Care Guide

should be kept with the

water heater for reference.

INSTALLATION

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

OPERATION

Start-up and Operaon

NOTICE: The default operang mode

is Hybrid Mode. To select a dierent

mode, see “Adjusng the Control

Assembly’s Operaonal Modes” on

page 21.

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 diagnosc. This typically

takes several minutes.

NOTICE: The water heater will conduct

a system diagnosc (approximately

seven (7) to ten (10) minutes) each

me power is applied from an o

state. Normal operaon will begin

aer the system diagnosc has been

completed. If the system diagnosc

yields any codes, reference the

diagnosc codes secon in this

manual.

The diagnosc sequence

typically takes seven (7) to ten

(10) minutes. During this

period the Control Assembly will

display a series of single, alternang

dashes repevely. Once the

diagnosc sequence has nished, the

fan will turn on.

NOTICE: The heat pump’s fan will

not turn on if the incoming water

temperature is less than 55°F/13°C

and/or the ambient air temperature is

above 120°F/49°C, or below 37°F/7°C.

Should the internal diagnoscs detect

the heat pump is out of operaonal

range, the Control Assembly will

display the code HPO.

Set the desired operaonal

mode. For typical installaons,

the factory default mode

(Hybrid Mode) oers the best

combinaon of eciency and hot

water delivery.

Operang Mode

Descripons

The operang modes can be changed

by pressing the buon for any desired

mode (Figure 24 on page 21). The

Operaon Mode Indicaon Light will

turn on when the relevant mode is

selected.

This unit is equipped with technology

that senses the hot water demand

from the unit. While in Heat Pump or

Hybrid Mode, during normal usage,

the unit will operate the heat pump

for maximum eciency. In Hybrid

Mode, during periods when the

water usage is above normal, this unit

has the ability to use one element

(upper or lower) and the heat pump

simultaneously to help improve

recovery. This transion is seamless

and will go unnoced.

General Operaon

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 temperature

set point. The water heater has

three means of heang the water:

the elements, the heat pump, and a

combinaon of the elements and heat

pump.

The control logic of the Control

Assembly is designed so that the

heat pump will always have priority

over the elements. The temperature

regulaon will not be performed

unl aer Dry-Fire detecon tesng

indicates that there is sucient water

in the tank.

Vacaon Mode

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 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ons

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 con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.

WARNING! 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

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 ame

or other ignion source near the

faucet while it is open.

OPERATION

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

Heat Pump Mode

Provides the highest eciency and

lowest cost operaon by using only

the heat pump for heang. Recovery

me and eciency will vary with

ambient temperature and relave

humidity. Eciency will be greatest,

and recovery quickest, when both

are high. At lower temperatures and

relave humidity levels, eciency will

be lower and recovery will take longer.

Heat pump operaon is allowed

between 37°F/3°C to 120°F/48.9°C

ambient temperature. At ambient

temperatures lower than 37°F/3°C

and greater than 120°F/48.9°C, the

heat pump will not operate. Similarly,

if the water temperature in the

tank is less than 55°F/13°C, the heat

pump will not operate. The Control

Assembly will display the code HPO,

and the unit will operate in Electric

Mode unl ambient air and water

temperatures return to the safe

operang range of the heat pump.

Hybrid Mode

This is the default, recommended

seng combining high energy

eciency with reduced recovery

me. This mode uses the heat pump

as the primary heang source. One

of the heang elements (upper or

lower) will provide supplementary

heang if demand exceeds a

predetermined level so that the set

point temperature can be recovered

more quickly.

Electric Mode

The water heater funcons as a

convenonal electric unit, relying on

only the elements for heat. This mode

may be useful in periods of increased

hot water demands. When Electric

Mode is selected, the duraon mer

will be displayed. The default Electric

Mode days are preset at 3 days. Press

the Up and Down buons to modify

the mer to the desired number of

Electric Mode days (seng range: 1

to 7 days). The mer will blink on the

display; press the Mode/Enter buon

to conrm the Electric Mode mer.

NOTICE: Do not shut o power to the

unit for extended periods of me.

If power must be turned o for an

extended period of me, turn OFF

the power to the water heater at the

circuit breaker/fuse box, and then

drain the tank completely.

Other Controls

HEAT PUMP DEFROSTING

INDICATION:

There will be frost accumulang

on the evaporator when the heat

pump is operated under low ambient

temperatures. The controller will

order the unit to enter defrosng

cycle to opmize the heat pump

operaon performance. During

the defrosng period, the Control

Assembly will display ICE as an

indicaon.

OUT OF HEAT PUMP OPERATION

RANGE:

The Control Assembly will display HPO

as an indicaon that the ambient and/

or water temperature condion is out

of the heat pump operaon range.

NOTICE: The display will go into

“Sleep Mode” for energy saving if

there is no operaon on any buon

for 15 minutes. All of the display and

lights will be turned o except for the

“Operaonal Mode Indicaon Light,”

which will remain illuminated while

the unit is powered on. The unit can

be awakened by pressing any buon.

Your Heat Pump Water Heater is

equipped with an EcoPort CTA-2045

communicaon port. Contact your

local electric ulies company for

parcipaon and plug in module

availability and to learn more

about potenal energy savings

opportunies.

OPERATION

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

OPERATION

Element

Energized

LED Indicator

Control Assembly

Lock LED Indicator

Water Temperature

Set Point

Temperature

Down (Decrease)

Button

Temperature

Up (Increase)

Button

Wi-Fi

Button

Grid Enabled

Button W/LED

Indicator

Heat Pump Mode

Button

Celsius LED

Indicator

Fahrenheit LED

Indicator

Hybrid Mode

Button

Days LED

Indicator

Error LED

Indicator

ENTER

Vacation Mode

Button

Electric Mode

Button

LCD Display Panel

Enter/Lock Button

Bluetooth

Button

Figure 24 - Control Assembly

ADJUSTING THE CONTROL ASSEMBLY’S

OPERATIONAL MODES

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

buon for approximately 3 seconds, then touching the

desired mode icon on the Control Assembly (Figure 24).

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 4. If the instrucons are not clear, contact a

qualied service technician.

The water temperature can be adjusted from 95°F/35°C to

150°F/65°C by pressing followed by the

buon

to set the desired temperature. The Control Assembly is

unlocked by default. To lock the display aer seng the

parameters, hold the

buon for 3 seconds.

°F/°C SWITCH: 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.

HYBRID MODE - System default mode. Pressing this

buon will allow high eciency heat pump operaon

with supplementary heang from a backup heang

element during periods of high demand.

HEAT PUMP MODE - Provides the highest eciency

and lowest cost operaon by using only the heat

pump for heang while in safe operang range of the

heat pump.

VACATION MODE - The Control Assembly adjusts the

temperature set point to approximately 50°F/10°C.

This mode is recommended 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.

ELECTRIC MODE - The water heater funcons as

a convenonal electric unit, relying on only the

elements for heat. This mode may be useful in

periods of increased hot water demand.

SMART GRID CONTROL - Pressing this buon will

enable or disable a request for grid control (see page

24).

CONTROL ASSEMBLY LOCK - Holding this buon for

more than 3 seconds switches the lock mode on or

o.

Wi-Fi - Press this buon once to acvate the Wi-Fi

signal.

BLUETOOTH - Press this buon once to acvate the

Bluetooth signal.

°F/

°F/°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.

HEATING CYCLE ICON - Indicates the water heater is

in a heang cycle and the elements are energized.

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

unit will be set in vacaon mode.

CAUTION INDICATOR - Indicates when there is a

Warning/Fault.

FAULT CONDITION - Will display a three digit fault

code with Alert Icon Flashing (see Diagnosc code

chart on page 25).

LOCK - Indicates the control assembly is locked.

OPERATION

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

Wi-Fi

(Control Assembly)

This water heater comes equipped

with the iCOMM™ remote monitoring

system. It allows users to monitor

crical operaons and diagnose issues

remotely using the manufacturer’s

water heater app (available for IOS

and Android).

The iCOMM system can automacally

nofy selected personnel via email

and/or cellular phone text messages if

operaonal problems occur.

It is recommended the water heater

app be installed on the homeowner’s

device prior to seng up the Wi-Fi

funcon on this water heater.

IMPORTANT: By enabling and

connecng your water heater to

Wi-Fi, you are granng permission

to the manufacturer to push “over-

the-air” (OTA) updates to the water

heater and to collect telemetry data

regarding the water heater. The OTA

updates may be pushed periodically

to address bugs and provide security

patches. Refer to the Terms and

Condions at www.aosmith.com/

Ulity-Pages/Terms-and-Condions/

for more details. Also, refer to www.

aosmith.com/Privacy-Policy/ for

more informaon about how we

collect and use data.

Wi-Fi Set Up:

The Wi-Fi signal is set to OFF by

default and will not produce a signal

unl acvated.

NOTICE: Have the router SSID and

password ready.

• Download the iCOMM Ulies app

for your smart phone.

• Launch the iCOMM Ulies app on

your smart phone, then follow the

simple steps. The iCOMM Ulies

app makes it easy to set up, program

and control your water heater.

• Create an account or log in to your

exisng account and tap the “add a

water heater” buon.

• When the app prompts you to

acvate the Wi-Fi signal, proceed

with the following steps:

To acvate the Wi-Fi signal,

press the Wi-Fi buon once.

The LED will blink on and o

in 1/2 second intervals. Wi-Fi will

acvate pairing mode (Figure 25).

ENTER

Pressing the Wi-Fi button once will activate

the Wi-Fi signal for 15 minutes.

Figure 25 - Wi-Fi Control

The app will display a

temporary Wi-Fi network to

connect to your device.

Select the network that matches the

water heater DSN value, and your

device will connect to the Wi- radio

on the Control Assembly:

Figure 26 - Select Temporary Network

The app will begin the

communicaon process of

linking your water heater to

your Wi-Fi router.

Select your preferred Wi-Fi

network from the list on the

app. LED will pulse from dim

to bright when aempng to connect

to local network.

Figure 27 - Select Your Wi-Fi Network

NOTICE: If the app does not prompt

you with a list of available Wi-Fi

networks, access Wi-Fi sengs on

your device and select your preferred

network.

The app will aempt to

connect with your Wi-Fi

network. We recommend

connecng to a Wi-Fi network that

has been secured with a password.

The LED will hold solid when

connected.

The app will display the water

heater temperature set point.

Congure the water heater

Set Point, Mode, and Time of

Use Rate Plan if applicable.

NOTICE: If the Wi-Fi signal is to be

terminated, press and hold the Wi-Fi

buon for 3 seconds. The Control

Assembly will beep once. This will

turn the Wi-Fi signal o. The Control

Assembly resets and the LED display

will turn o. Press and hold the Wi-Fi

buon for 9 seconds to remove the

original connected network from the

Control Assembly memory.

OPERATION

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

OPERATION

Bluetooth

(Control Assembly)

This water heater comes equipped

with the iCOMM™ remote monitoring

system. It allows users to monitor

crical operaons and diagnose issues

remotely using the manufacturer’s

water heater app (available for IOS and

Android).

The iCOMM system can automacally

nofy selected personnel via email

and/or cellular phone text messages if

operaonal problems occur.

It is recommended the water heater

app be installed on the homeowner’s

device prior to seng up the

Bluetooth funcon on this water

heater.

IMPORTANT: By enabling and

connecng your water heater to

Bluetooth, you are granng permission

to the manufacturer to push “over-

the-air” (OTA) updates to the water

heater and to collect telemetry data

regarding the water heater. The OTA

updates may be pushed periodically

to address bugs and provide security

patches. Refer to the Terms and

Condions at www.aosmith.com/

Ulity-Pages/Terms-and-Condions/

for more details. Also, refer to www.

aosmith.com/Privacy-Policy/ for more

informaon about how we collect and

use data.

Bluetooth Set Up:

The Bluetooth signal is set to OFF by

default and will not produce a signal

unl acvated.

NOTICE: Have the device SSID and

password ready.

• Download the iCOMM Ulies app

for your smart phone.

• Launch the iCOMM Ulies app on

your smart phone, then follow the

simple steps. The iCOMM Ulies

app makes it easy to set up, program

and control your water heater.

• Create an account or log in to your

exisng account and tap the “add a

water heater” buon.

• When the app prompts you to

acvate the Bluetooth signal,

proceed with the following steps:

To acvate the Bluetooth

signal, press the Bluetooth

buon once. The LED will

blink on and o in 1/2 second

intervals. Bluetooth will acvate

pairing mode (Figure 28).

ENTER

Pressing the Bluetooth button once will activate

the Bluetooth signal for 10 minutes.

Figure 28 - Bluetooth Control

NOTICE: Once acvated, the Bluetooth

signal will automacally terminate

aer 10 minutes if no aempt to pair

your device is made.

Select the opon in the app to

begin linking your device with

the Bluetooth radio on the

Control Assembly.

The app will begin the

communicaon process of

linking your water heater to

your Bluetooth device.

The app will aempt to

connect with your Bluetooth

device. We recommend

connecng to a Bluetooth device that

has been secured with a password.

The LED will hold solid when

connected.

NOTICE: Once connected, the

Bluetooth signal will automacally

terminate aer 30 minutes of

inacvity.

The app will display the water

heater temperature set point.

Congure the water heater

Set Point, Mode, and Time of

Use Rate Plan if applicable.

NOTICE: If the Bluetooth signal is to

be terminated, press and hold the

Bluetooth buon for 3 seconds. The

Control Assembly will beep once.

This will turn the Bluetooth signal o.

The Control Assembly resets and the

LED display will turn o. The original

connected device has been removed

from the memory of the water heater

Control Assembly.

OPERATION

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

Smart Grid Technology

The electric Smart Grid will enable

signi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

interrupons, 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 naon has

also led to higher peak ulity costs.

Smart appliances are one way to

help migate this problem. By using

advanced digital communicaon

technologies, smart appliances will

be able to communicate with local

power companies or home energy

systems, and react accordingly to

save energy and money. For example,

during peak demand periods, the

water heater may pause or delay its

power consumpon and thus reduce

the load on the smart ulity grid.

Addionally, 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

ulmately save money.

EcoPort CTA-2045,

Smart Grid Control

(Where Available)

Where available, grid communicaon

adaptors called Universal

Communicaon 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 unit’s 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

o electric power to the water heater

at the circuit breaker or 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 or fuse box (Figure 29).

Remove

Panel

Grid Connection Pins

ENTER

Figure 29 - Accessing EcoPort CTA-2045

communication port.

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 is made, the grid

control is automacally enabled. Press

the “Enter” buon to conrm UCM is

present. This acon will be followed

by a solid LED from the grid indicator

(Figure 30).

Enabling this feature will allow

acceptance of the power company

communicaon grid management

requests.

NOTICE: The LED will blink when the

power company has control of the

unit.

ENTER

Pressing the Smart Grid Control

button will enable and/or disable

a request for grid control.

Figure 30 - Smart Grid Control Button

To disable (override) grid control,

press the “Smart Grid Control”

buon (Figure 30). This acon will be

followed by a 72 hour mer. Remove

CTA 2045 UCM. Press the “Enter”

buon to conrm the disconnecon.

The LED will turn o.

NOTICE: If the CTA 2045 UCM is

not removed followed by pressing

the “Enter” buon, the grid will be

enabled automacally once the 72

hour mer has expired.

OPERATION

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

TROUBLESHOOTING

CONTROL ASSEMBLY DIAGNOSTIC

CODE CHART

IMPORTANT: Before aempng to adjust the thermostat, read

the “Important Safety Informaon” secon on page 4. If the

instrucons are not clear, contact a qualied person.

ENTER

Error

Code

Battery

Tray

Figure 31 - Control Assembly Diagnostic Coding.

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; or

2. Turn off electrical power at the breaker.

3. Check element circuits for resistance of 5-25

ohms (replace if required, see page 34).

4. Turn on electrical power at breaker.

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

No Error Code Displayed

No Hot Water

No power, control panel or thermostat operation 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.

NOTICE: If the control panel was not connected via

Wi-Fi or Bluetooth, the time will need to be set.

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.

003 with an alert Icon flashing.

(also flashing red LED.)

Upper thermistor sensor failure

NOTICE: Upper thermistor sensor is mounted to tank

and located above upper element

1. Turn off electrical power at the breaker.

2. Check electrical connections at Control

Assembly board.

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

the thermistor.

4. Turn on electrical power at breaker.

NOTICE: The Control Assembly will go into Limp

Mode until the failure is corrected. See page 28.

004 with an alert Icon flashing.

(also flashing red LED.)

Lower thermistor sensor failure

NOTICE: Lower thermistor sensor is mounted to tank

and located above lower element

1. Turn off electrical power at the breaker.

2. Check electrical connections at Control

Assembly board.

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

the thermistor.

4. Turn on electrical power at breaker.

NOTICE: The Control Assembly will go into Limp

Mode until the failure is corrected. See page 28.

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

- Crystal 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.

009 with an alert Icon flashing.

(with flashing red LED.)

Power supply voltage is too low or too high Check for loose electrical connections, refer to

“Power Cycling the Unit” on page 31.

TROUBLESHOOTING

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

ERROR CODE INDICATES CORRECTIVE ACTION*

021 with an alert Icon flashing.

(also flashing red LED.)

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, see page 34).

3. Check wires at elements, thermostat and

Control Assembly board 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 corrected. See page 28.

022 with an alert Icon flashing.

(also flashing red LED.)

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, see page 34).

3. Check wires at elements, thermostat and

Control Assembly board 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 corrected. See page 28.

025 with an alert Icon flashing.

(with flashing red LED.)

Heat Pump Coil Temperature Sensor is not functioning 1. Power off (“Power Cycling the Unit,” page 31).

2. Disconnect and reconnect the J9 connection

from control board.

3. Inspect wire for damage.

4. Re-install Control Assembly.

5. Reconnect power.

6. If error persists, replace temperature sensor.

026 with an alert Icon flashing.

(with flashing red LED.)

Heat Pump Suction Temperature Sensor is not

functioning

1. Power off (“Power Cycling the Unit,” page 31).

2. Disconnect and reconnect the J9 connection

from control board.

3. Inspect wire for damage.

4. Re-install Control Assembly.

5. Reconnect power.

6. If error persists, replace temperature sensor.

027 with an alert Icon flashing.

(with flashing red LED.)

Heat Pump Discharge Temperature Sensor is not

functioning

1. Power off (“Power Cycling the Unit,” page 31).

2. Disconnect and reconnect the J9 connection

from control board.

3. Inspect wire for damage.

4. Re-install Control Assembly.

5. Reconnect power.

6. If error persists, replace temperature sensor.

028 with an alert Icon flashing.

(also flashing red LED and beeper.)

Ambient Temperature Sensor failure (Heat Pump

Compressor is outside of operational temperature

range)

1. Turn off electrical power at the breaker.

2. Turn on electrical power at breaker to see if

code clears. If error persists, call our Technical

Assistance Hotline which is listed on the water

heater’s warranty sheet for further assistance.

031 with an alert Icon flashing.

(also flashing red LED and beeper.)

Water Leak 1. Turn off electrical power at the breaker, check

all electrical connections, and wiring for

damage.

2. Check for plumbing leaks and correct accord-

ingly.

3. If tank is leaking, replace the unit.

4. Turn on electrical power at breaker.

044 with an alert Icon flashing.

(with flashing red LED.)

SAC anode depleted 1. Turn off electrical power. Shut off the cold water

valve at the main line and open a hot water fau-

cet to release pressure from the water heater.

2. Remove anode rod (see page 33).

3. Inspect anode rod and replace if necessary.

046 with an alert Icon flashing.

(also flashing red LED and beeper.)

Shut-off Valve (if applicable) 1. Turn off electrical power. Shut off the cold water

valve at the main line and open a hot water fau-

cet to release pressure from the water heater.

2. Check the shut-off valve, making sure the valve

is not stuck in the open or closed position (see

instructions provided with shut-off valve).

3. Replace the shut-off valve, if needed.

4. Turn on electrical power at breaker.

5. Open the cold water valve to fill the heater with

water, open a hot water faucet to bleed all air

until water flows without air bursts.

TROUBLESHOOTING

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

TROUBLESHOOTING

ERROR CODE INDICATES CORRECTIVE ACTION*

048 with an alert Icon flashing.

(with flashing red LED.)

Battery Low Energy 1. Make sure the battery protective tab has been

properly removed from the battery tray, located

on the left side of the Control Assembly.

2. Locate the battery tray on the side of the control

assembly.

3. Remove the Phillips head screw, slide the bat-

tery tray out from the Control Assembly.

4. Remove the old BR2032 battery and replace

with a new Panasonic® BR2032 or Murata

CR3032 battery.

5. Reinstall the battery tray with new battery and

hand tighten the Phillips head screw to secure

the battery tray in the Control Assembly.

NOTICE: If the control assembly was not connect-

ed via Wi-Fi, Bluetooth, or powered by a power

source, the time will need to be set.

080 with an alert Icon flashing.

(with flashing red LED.)

Air filter is dirty 1. Take the tab on the air filter and remove (slide)

it from the air intake duct adaptor located on the

top of the unit.

2. If you are replacing the filter, skip to step three.

To clean the filter, use a vacuum with a hose

attachment to remove any dust or debris.

3. Place the new or cleaned filter into the water

heater.

081 with an alert Icon flashing.

(with flashing red LED and beeper.)

Condensate management 1. Ensure unit is installed level.

2. Check for blocked condensate drain line, clear

drain line as necessary.

3. If an accessory condensate pump was installed:

Turn off power to the water heater at the

breaker and check control wire connections

to condensate pump. See “Connecting the

Condensate Pump Optional Overflow Shut-Off

Switch” on page 11. Reconnect power.

4. Check to see if the accessory condensate

pump is plugged in and has power.

5. Ensure the pump is operating properly, check

pump outlet tube for blockage.

6. Repair or replace accessory condensate pump

as necessary.

7. If problem persists, call our Technical

Assistance Hotline which is listed on the water

heater’s warranty sheet.

083 with an alert Icon flashing.

(with flashing red LED and beeper**.)

Heat Pump Compressor suction pressure is too low Call our Technical Assistance Hotline which is listed

on the water heater’s warranty sheet for further

assistance.

084 with an alert Icon flashing.

(with flashing red LED and beeper**.)

Heat Pump Compressor is not functioning Call our Technical Assistance Hotline which is listed

on the water heater’s warranty sheet for further

assistance.

085 with an alert Icon flashing.

(with flashing red LED and beeper**.)

Heat Pump Compressor discharge temperature is too

high

Call our Technical Assistance Hotline which is listed

on the water heater’s warranty sheet for further

assistance.

086 with an alert Icon flashing.

(with flashing red LED and beeper***.)

Fan speed feedback Call our Technical Assistance Hotline which is listed

on the water heater’s warranty sheet for further

assistance.

*These instrucons are brief and intended as guidance for a qualied person. If you lack the necessary skills to perform these pro-

cedures call the Technical Assistance Hotline which is listed on the water heater’s warranty sheet for assistance.

**Audible alarm will beep if error code is triggered three (3) mes in one (1) hour.

***Audible alarm will beep if error code is triggered three (3) mes in seventy-two (72) hours.

TROUBLESHOOTING

28 • Residenal 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 nished,

be sure all covers are secured to

reduce the risk of re and electric

shock.

Troubleshoong &

Maintenance

If you are not qualied or are not

comfortable performing any of

the troubleshoong, repair or

maintenance procedures that follow,

call our Technical Assistance Hotline

for further assistance.

Limp Mode

The heater will connue operang

with one failed heang method by

switching into Limp Mode:

• If the Control Assembly 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 Assembly 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 power to the water heater (no

lights on the unit are acvated).

• Unit in Vacaon Mode.

• ECO tripped.

• Hot water usage paern exceeds

the capability of the water heater in

current mode.

• Non-funconing upper temperature

sensor.

• Faulty thermostac mixing valve.

• Leak in plumbing system.

Follow these steps to diagnose and

correct common electrical problems:

Check the Electrical Power to

the Water Heater.

No hot water is oen cause by a

problem with the home’s electrical

wiring or circuit breakers. You will

need a non-contact circuit tester.

Follow these guidelines:

• Locate the water heater’s circuit

breaker and turn it o (or remove

the circuit’s disconnects).

• Locate the electrical juncon box

on the side of the water heater and

remove the cover.

• Idenfy the two power wires. The

power wires are usually black/black

or black/red. The green or copper

wire is the ground wire.

Figure 32 - Use a non-contact circuit tester to

check for electrical power.

• Turn the circuit breaker back on (or

install the disconnects) and check

the power on both incoming power

wires using a non-contact circuit

tester.

• Turn the power o and replace the

cover on the electrical juncon box.

If the water heater is not geng

power, contact a qualied person to

have your home’s wiring or circuit

breakers checked.

Check the Upper Heang

Element.

If the water heater is geng electrical

power, check to see if the upper

heang element is burned out. If the

upper element is burned out, you will

have no hot water. To check the upper

element, you will need a mulmeter

capable of reading resistance.

• Turn the power OFF at the circuit

breaker or remove disconnects.

• Remove the upper access panel.

• Move the insulaon to access the

ECO and heang element.

Check the Top Two Screws of

the ECO Using a Non-Contact

Circuit Tester and Conrm

that Power is OFF (screw terminals 1

and 3 in photo on next page).

With the electrical power OFF, remove

the two power wires from the upper

heang element.

Figure 33 - Use a multimeter to check the

resistance of the upper heating element.

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

TROUBLESHOOTING

Check the Resistance of the

Upper Heang Element Using

a Mulmeter.

Measure the resistance between the

two screw terminals on the upper

heang element. A good element will

have a resistance ranging between 5

and 25 Ohms. If the resistance is:

Outside this Range. Replace the

element (see “Replacing the Heang

Element” on page 34). If the lower

element is a concern, repeat the

element check procedure for the

lower element. The upper and lower

elements should have the same

resistance range.

Within this Range. Reaach the power

wires, making sure the wires are in

good condion and the connecons

are clean and ght.

Check/Reset Energy Cut O (ECO)

Buon.

Reset Button

1 3

Figure 34 - Energy Cut Off (ECO) Button.

The Energy Cut O (ECO) shuts o

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 will have no hot water.

A tripped ECO can usually be reset,

but you should have a qualied

person invesgate the cause of the

overheang and repair the problem.

Do not turn the power back on unl

the cause of the overheang has been

idened and repaired.

To Check the Energy Cut O (ECO):

• Turn o 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

o.

• Press the red ECO reset buon

(Figure 34).

• 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. Have a qualied

person check the upper and lower

elements and replace if necessary.

• The ECO was not tripped if you did

not hear a click. In that case it should

be checked by a qualied person.

• Replace the insulaon and the upper

access panel.

• Turn the power back on to the water

heater.

WARNING! Be sure all covers are

secured to reduce the risk of re and

electric shock.

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

Thermal Expansion Tank (see “Step

1” on page 7 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

Reducing Valve (PRV) on the main cold

water supply line. Adjust the PRV to

between 50-60 psi/345-414 kpa.

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

pressure 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, allowing

small quanes of water to ush out

the debris. See the label on the T&P

Relief Valve for instrucons.

WARNING! When manually

operang the T&P Relief Valve,

make sure that no one is in front

of or around the discharge outlet.

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 50-60

psi/345-414 kpa, a Thermal Expansion

Tank is installed and properly

pressurized, the valve has been cleared

of any debris, and it sll drips, the

valve may be broken – have a qualied

person replace the T&P Relief Valve.

30 • Residenal Electric Water Heater Use and Care Guide

TROUBLESHOOTING

Water Odor

Harmless bacteria normally present

in tap water can mulply in water

heaters and give o a “roen egg”

smell. A higher tank temperature

seng of 140°F/60°C kills the bacteria

that causes “smelly water” and can

reduce the levels of bacteria that

cause water-borne disease. A properly

adjusted Thermostac Mixing Valve

should be installed at each point of

use.

NOTICE: To protect the tank, an anode

rod must be installed in the water

heater at all mes or the warranty is

void.

WARNING! Because higher

temperatures increase the risk of

scalding, if the temperature set

point is higher than 120°F/49°C,

Thermostac Mixing Valves are

parcularly important (see page 4

and Figure 8).

Water Heater Sounds

During the normal operaon of the

water heater, sounds or noises may be

heard. These noises are common and

may result from the following:

• Normal expansion and contracon

of metal parts during periods of

heat-up and cool-down.

• Sediment buildup on or around

the elements could create varying

amounts of noise and may cause

premature tank failure. Drain and

ush the tank as directed (see

“Draining and Flushing the Water

Heater” on page 32).

• The heat pump compressor or fan

running.

Temperature Too High

If the water temperature is too hot:

• Adjust the Control Assembly on

the water heater (see “Adjusng

the Control Assembly’s Operaonal

Modes” on page 21).

• Install or adjust a Thermostac

Mixing Valve (see manufacturer’s

instrucons).

A non-funconing thermostat or

a shorted heang element can

cause extremely hot water. If the

Temperature and Pressure (T&P)

Relief Valve releases large amounts

of very hot water, it is likely due to a

shortened heang element, or more

rarely a non-funconing thermostat,

or the thermostat does not t

snuggly against the tank. Very high

water temperatures can also cause

the Energy Cut O (ECO) to trip (see

“Replacing the ECO” on page 35).

Turn power o unl this problem is

repaired.

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 pressure is only on the hot

water side, the primary causes of this

are:

• Melted PEX liner. Soldering copper

pipes while they are connected

to the water heater can melt the

PEX liner inside of the hot and cold

water connecons. Melng the PEX

liner can restrict the ow of hot

and cold water. If that is the case,

replace the nipples at the hot and

cold water connecons.

• Parally closed supply valve. Open

the water heater’s supply valve fully.

Insucient or No Hot

Water, or Slow Hot

Water Recovery

WARNING! Because higher

temperatures increase the risk of

scalding, if the temperature set

point is higher than 120°F/49°C,

Thermostac Mixing Valves are

parcularly important (see page 4

and Figure 8).

If the hot water is simply not warm

enough, there are several possible

causes:

• Thermostac Mixing Valve faulty or

set too low.

• Temperature set point too low.

• Hot water usage paern exceeds

the capability of the water heater in

current mode (see “Operang Mode

Descripons” on page 19).

• Water connecons to unit are

reversed (disconnect and re-install

correctly).

• Leak in plumbing system (check

home for any leaks and repair).

• Lower heang element not

funconing properly.

• No power to the water heater (no

lights on the unit are on and display

is blank).

• Unit is in Vacaon Mode.

• ECO tripped.

• Non-funconing upper thermistor

sensor (refer to code 003 in the

“Diagnosc Codes” secon on page

25).

• Air lter is dirty (see “Air Filter

Maintenance” on page 36).

Residenal Electric Water Heater Use and Care Guide • 31

TROUBLESHOOTING

• Out of posion outlet j-tube. Assure

orientaon of line on tube is in top

posion (side connecons only).

Thermostac Mixing Valves. If the

hot water is simply not warm enough,

make sure the faucet you are checking

does not have a defecve Thermostac

Mixing Valve. 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.

Temperature Set Point Too Low. If the

water temperature at several faucets

is too cool, adjust the set point at

the Control Assembly (see “Water

Temperature Adjustment” on page 21).

Undersized Water Heater. If your

water heater runs out of hot water

too quickly, it may be too small for

your needs. If the water heater is old,

consider replacing 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

a Thermostac Mixing Valve and then

seng the temperature to a higher

set point on the Control Assembly (see

“Water Temperature Adjustment” on

page 21).

You can also reduce your home’s hot

water needs by washing clothes in cold

water, installing ow restrictors on

shower heads, repairing leaky faucets,

and taking other conservave steps.

Reversed Connecons or Melted

J-tube. Check the hot and cold

connecons and make sure your

home’s hot water pipe is connected

to the hot water 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 J-tube may

have melted. The J-tube is a curved

plasc tube inside the tank aached to

the cold water inlet. If the J-tube has

melted, it can be replaced by removing

the old J-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 water heater is producing

lile or 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, it usually wears out before the

upper element. Replace the lower

element if necessary (see “Replacing

the Heang Element” on page 34).

Power Cycling the Unit

Find and turn o the water

heater’s circuit breaker or

remove disconnects.

Locate the electrical juncon

box on side of water heater,

remove cover and idenfy the

two (2) power wires.

Turn circuit breaker back on

(or re-install the disconnects)

and check for power on both

incoming power wires using a

mulmeter.

Again, turn o the water

heater’s circuit breaker, or

remove the disconnects and

replace the electrical juncon box

cover, before performing maintenance

work.

NOTICE: When powered on, the unit

will start to run a system diagnosc.

The diagnosc sequence typically takes

seven (7) to ten (10) minutes. During

this period the Control Assembly will

display a series of single, alternang

dashes repevely.

WARNING! Working near an

energized circuit can result in severe

injury or death from electrical shock.

WARNING! When you are nished,

be sure all covers are secured to

reduce the risk of re and electric

shock.

32 • Residenal Electric Water Heater Use and Care Guide

MAINTENANCE

Roune Maintenance

Roune maintenance will help your

water heater last longer and work

beer. If you cannot perform these

roune maintenance tasks yourself,

contact a qualied person.

Water Heater

Maintenance

Aer the rst six months, drain and

ush the water heater and inspect

the anode rod. Depending on the

hardness 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 a 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 sediment 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 temperature sengs,

and other variables. We recommend

draining and ushing the water heater

aer the rst six months of operaon

to determine the amount of sediment

buildup. Draining sediment extends

the life of the tank, heang 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 qualied person

use a deliming agent suitable

for potable water to remove the

sediment buildup.

• In most cases, it is easier and less

expensive to replace lime-encrusted

elements than trying to remove

heavy lime deposits.

To Drain and Flush the

Tank

Locate the water heater’s

circuit breaker and turn it

OFF (or remove the circuit’s

fuses).

Figure 35 - Circuit Breaker.

Open a hot water faucet and

let the hot water run unl it

is cool.

Figure 36 - 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 37 - 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. This is an

addional precauon to protect the

elements against dry re. Dry re

occurs when power is supplied to the

electric elements without sucient

water in the heater. Dry ring the

unit will result in immediate failure

of the element. While this unit is

equipped with dry re protecon, the

recommended pracce is to ensure

the tank is lled with water prior

to supplying power to the unit. For

complete instrucons on lling the

tank, follow “Step 13” on page 16 in

the installaon secon of this manual.

If sediment was present

when the tank was drained,

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.

Re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 cause the upper

heang element to burn out. Once

MAINTENANCE

Residenal Electric Water Heater Use and Care Guide • 33

MAINTENANCE

you are certain the tank is completely

full of water, close the hot water

faucet.

Turn ON power to the water

heater at the circuit breaker/

fuse box. It may take two

hours for the tank to heat up.

Replacing the Anode

Rod

NOTICE: The Control Assembly will

display error code 044 when the anode

rod has been depleted.

To replace the anode rod if it

is depleted: Turn the power

o. Run hot water unl it is

cool. Turn cold water supply valve o.

Open a hot water faucet to

depressurize tank.

Remove ducng from unit.

Disconnect cold water supply

and hot water supply

connecons from top of unit if

necessary to remove jacket cover.

To avoid damaging gaskets in ex

lines, use a second wrench at the hot

and cold nipples to counter torque

when installing or removing water

connecons. DO NOT overghten.

Remove the six (6) screws

located around the perimeter

of the jacket cover. Locate and

remove the two (2) screws on top of

the unit fastening the jacket cover to

the heat pump evaporator. Li the

jacket cover up and away from the unit

to gain access to the anode rod (see

illustraon on back cover for locaon

of anode rod).

Once the anode rod is

exposed, remove the top nut

with a 10 mm hex socket

wrench and remove the wire terminal

(do not remove lower hex nut from

bolt). With the wire terminal removed,

use a 1-1/16” socket wrench with an

extension to remove the anode rod.

Inspect the anode rod and replace if

depleted. Apply thread sealant tape or

pipe joint compound and reinstall the

anode rod ghtly. Connect the wire

terminal and secure with hex nut.

Install jacket cover to water

heater by following the

instrucons outlined in Step 3

in reverse order.

Reconnect cold water supply

and hot water supply

connecons at top of unit.

Re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 (3) minutes to make sure

the tank has all the air removed and is

completely full of water. Failure to

perform this step can cause the upper

heang element to burn out. Once you

are certain the tank is completely full

of water, close the hot water faucet.

Remove the three (3) screws

securing intake duct adaptor

(closest to front side of water

heater) to jacket cover. Li intake duct

adaptor up and away from jacket cover

to visually inspect for leaks around the

anode ng and water connecons. If

there are no leaks, proceed to Step 9.

If there is a leak, turn OFF water supply

to the water heater, open a faucet to

eliminate pressure, and ghten the

anode rod further. Return to Step 7.

Install intake duct adaptor to

jacket cover and secure with

three (3) screws. Reconnect

any ducng to the intake and exhaust

adaptors.

Restore power to the water

heater. It may take several

hours for the tank to heat up

depending on the tank size,

temperature seng, and cold water

supply temperature.

Figure 38 - Anode Rods from new (top) to

partially depleted (middle) to fully depleted

stages (bottom).

Anode Rod. The anode rod is a

sacri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 rst six months of

operaon when you drain and ush

the tank. Replace the anode rod if it

is substanally worn out or depleted.

Thereaer, inspect the anode rod

annually 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

qualied person replace it (anode rods

are a consumable item and are not

covered under warranty).

34 • Residenal Electric Water Heater Use and Care Guide

MAINTENANCE

Replacing the Heang

Element

WARNING! Working near an

energized 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 nished, be sure all covers are

secured to reduce the risk of re and

electric shock.

If you are not comfortable replacing

a heang element or thermostat

yourself, have this work done by

a qualied person. To replace the

heang element, you will need the

following tools and supplies:

Figure 39 - 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 40 - 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 41 - Element Wrench.

• Some regular sockets (1-1/2 inch)

may work, but regular sockets

are oen beveled and may slip.

Inexpensive 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 at blade and Phillips screwdriver.

Steps for Replacing the

Heang Element:

NOTICE: A diagnosc code (see

“Control Assembly Diagnosc Code

Chart” on page 25) should indicate if

the upper or lower element has failed.

Turn the power OFF at the

circuit breaker or remove

fuses.

Figure 42 - Circuit Breaker.

Open the electrical juncon

box on the side of the water

heater. Using a non-contact

circuit tester, check the power wires

to make certain the power is OFF.

Figure 43 - Non-Contact Circuit Tester.

Open a hot water faucet and

let the hot water run unl 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 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 or lower

access panel on the water

heater, and then fold back

the insulaon and remove the plasc

element/thermostat cover.

Figure 44 - Access Panel.

With the tank drained and

the 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. 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.

Residenal Electric Water Heater Use and Care Guide • 35

MAINTENANCE

NOTICE: DO NOT turn power back

on unl the tank is completely full of

water. For complete instrucons on

lling the tank, follow “Step 13” on

page 16 in the installaon secon of

this manual.

Re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 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 cause the upper

heang element to burn out. Once you

are certain the tank is completely full

of water, close the hot water faucet.

Figure 45 - 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

damage. If the gasket is damaged,

replace the gasket and reinstall the

element.

Once the element is

successfully installed and

there are no leaks, replace the

power wires, thermostat cover,

insulaon, and access panel. Make

sure all wire connecons are ght.

Replace the cover on the electrical

juncon box.

Turn ON power to the water

heater at the circuit breaker/

fuse box. It may take two

hours for the tank to heat up.

Replacing the ECO

WARNING! Working near an

energized 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 nished, be sure all covers are

secured to reduce the risk of re and

electric shock.

To replace the ECO, you will 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.

ECO Reset

Button

Figure 46 - ECO

• A replacement ECO (see the repair

parts list on back cover).

• A business card to check the gap

between the ECO and tank.

• Tape and a permanent marker to

mark the wires.

• A at blade and Phillips screwdriver

Steps for Replacing the

ECO:

Turn the power OFF at the

circuit breaker or remove

fuses.

NOTICE: It is not necessary to drain the

tank to replace an ECO.

Open the electrical juncon

box on the side of the water

heater. Using a non-contact

circuit tester, check the power wires to

make certain the power is OFF.

1/2” Conduit

Opening

Green

Ground

Screw

Green

Ground

Wire

Red Wire

Black Wire

Power Supply

Connector

Figure 47 - Electrical Junction Box (bottom cover

to electrical junction box removed for clarity).

Remove the upper access

panel on the water heater and

carefully fold back the

insulaon and plasc element/ECO

cover (Figure 48).

Figure 48 - Element Access Panel/ECO

Compartment.

Make sure the replacement

ECO matches the original ECO.

36 • Residenal Electric Water Heater Use and Care Guide

MAINTENANCE

Mark the wires with tape so

you will know how to put

them back on.

Disconnect the wires from

the bad ECO and remove the

ECO from the metal

mounng clip.

Install the new ECO in the

metal mounng clip.

Make sure the new ECO ts

snuggly against the tank. You

should NOT be able to slip a

business card between the ECO and

the tank. If you can, bend the ECO

mounng clip unl the ECO 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/

ECO cover, insulaon, and

access panel.

Replace the cover on the

electrical juncon box.

Turn ON power to the water

heater at the circuit breaker/

fuse box.

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 the T&P Relief Valve).

If no label is aached to the T&P

Relief Valve, follow the instrucons

in this secon. Minerals 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. Before

operang the valve manually, check

that it will discharge in a place for

secure disposal. If the water does

not ow freely from the end of the

discharge pipe, turn OFF the power

to the water heater. Call a qualied

person to determine the cause.

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 ow freely from the end of

the discharge pipe, turn the power to

the water heater OFF. Call a qualied

person to determine the cause.

Figure 49 - T&P Relief Valve.

• At least every ve years, have a

quali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 quali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 “Drips from T&P Relief Valve

Discharge Pipe” on page 29.

Air Filter Maintenance

The heater will monitor the heat

pump operaon status and indicate

whether the lter should be cleaned.

If the Control Assembly displays the

code 080, this indicates the lter

should be cleaned or replaced with

the following process (see exploded

view of the unit on page 39 for air

lter locaon).

NOTICE: Before aempng to clean

or replace the air lter, turn OFF the

power to the water heater at the

circuit breaker/fuse box.

Take the tab on the air lter

and remove (slide) it from

the top facing air intake duct

adaptor.

To clean the lter, use a

vacuum with a hose

aachment to remove any

dust or debris.

Slide the new or cleaned

lter into the air intake duct

adaptor.

Turn ON power to the water

heater at the circuit breaker/

fuse box.

NOTICE: The water heater may

conduct a system diagnosc prior to

operaon.

Residenal Electric Water Heater Use and Care Guide • 37

MAINTENANCE

Condensate Drain

Maintenance

NOTICE: Before aempng to clean

the condensate drain pan or lines, turn

OFF power to the water heater at the

circuit breaker/fuse box.

Check the condensate drain

pan and drain lines for any dirt

or debris that might interfere

with proper drainage.

Use a pipe cleaner to clear

debris from condensate drain,

condensate line, and

condensate drain pan.

Once the condensate drain

pan and lines have been

inspected/cleaned, turn ON

power to the water heater at the

circuit breaker/fuse box.

NOTICE: The water heater will conduct

a system diagnosc prior to operaon.

Control Assembly

Baery Maintenance

CAUTION! Baery may explode

if mistreated. DO NOT recharge,

disassemble or dispose of in re.

It is recommended to replace the

baery in the Control Assembly every

5 years for reliability.

Locate the baery tray on the le side

of the Control Assembly (Figure 50).

ENTER

Battery

Tray

Figure 50 - Battery Tray location.

Replace the BR2032 or CR3032 baery

by removing the Phillips head screw

and sliding the baery tray with

baery out from the Control Assembly.

Insert the new Panasonic® BR2032 or

Murata CR3032 baery into the tray and

reinstall into the Control Assembly. Hand

ghten the Phillips head screw to secure

the tray in the Control Assembly.

NOTICE: If the Control Assembly was

not connected via Wi-Fi, Bluetooth, or

will need to be set.

MAINTENANCE

38 • Residenal Electric Water Heater Use and Care Guide

DIAGRAMS

SHUT OFF VALVE

BLUE

BLACK

GREEN

YELLOW

AMBIENT TEMP. SENSOR

COIL TEMP. SENSOR

SUCTION TEMP. SENSOR

DISCHARGE TEMP. SENSOR

CONDENSATE WATER

ALARM SIGNAL

TO DAUGHTER

BOARD

ANODE

(OPTION OF WATER

TEMP. SENSOR AND

BYPASS VALVE FOR

PREMIUM MODEL)

FAN MOTOR

BLACK

TANK LOWER TEMP. SENSOR

RED

A-A

B-B

TANK UPPER TEMP. SENSOR

EEV

TO MAIN

CONTROL

BOARD

TANK

A-A

TANK LOWER

TEMP. SENSOR

B-B

TANK UPPER

TEMP. SENSOR

BLACK

RED

BLUE

WHITE

LOWER ELEMENT

4.5KW

BLACK

UPPER ELEMENT

4.5KW

HIGH LIMIT

SWITCH

MOTOR

PROTECTOR

TANK TOP

COVER

COMPRESSOR

CAPACITOR

OPTIONAL OVERFLOW SWITCH

NORMALLY CLOSED

FIELD WIRING

FACTORY WIRING

JUNCTION

BOX

240VAC 60Hz 1Φ

208VAC 60Hz 1Φ

L1 L2 G

BLACKRED

TANK

JACKET

GREEN

RED

WHITE

RED

BLACK

RED

BLUE

WHITE

RED

CONDENSATE WATER

LEVEL SWITCH

Control Assembly and Thermostat Wiring Diagram

DIAGRAMS

Residenal Electric Water Heater Use and Care Guide • 39

REPAIR PARTS

10 11

REPAIR PARTS

Repair parts may be ordered through your

plumber, local distributor, home improvement

center, or by calling our Technical Assistance

Hotline which is listed on your warranty. When

ordering parts, always give the following

informaon:

1. Model, serial and product number

2. Item number

3. Parts descripon

ITEM NO. PARTS DESCRIPTION

1 Air Filter

2 208V Compressor

3 Overload Protector

4 Electronic Expansion Valve Coil

5 Control Assembly

6 Control Board, 208V/240V

7 Run Capacitor

8 Hoses (2x), Gaskets

9 Condensate Drain Pan

Dip Tube, for 50 gallon

Dip Tube, for 66 gallon

Dip Tube, for 80 gallon

11 Anode Rod, 37” for all models

J-Tube, for 50 gallon

J-Tube, for 66 and 80 gallon

13 Upper Element Personnel Protector

14 Energy Cut-O (ECO) Switch

15 Element Access Panel

16 Element, 4500 Was

17 Temperature & Pressure Relief Valve

18 Condensate Float

19 Leak Detecon Sensor

20 Lower Element Personnel Protector

21 Drain Valve

22* Automac Cold Water Shut-O Valve

*Part not shown.

Anode

T&P Valve

Control Assembly

Front of Unit

Back of Unit

37” for all models

ColdHot

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