Unbranded 100354544 Residential Electronic Thermostat Electric Water Heater Instruction Manual
- June 12, 2024
- UNBRANDED
Table of Contents
Installation Instructions and
Use & Care Guide
100354544 Residential Electronic Thermostat Electric Water Heater
Residential Electronic Thermostat
Electric Water Heater
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 difficulty following the directions, or aren’t sure you can safely and properly do any of this work yourself:
- Call your Local plumbing supplies store to have this water heater installed. Profes-sional Installation is available for this product and the work is guaranteed.
- Schedule an appointment with a qualified person to install your water heater.
- Call our Technical Assistance Hotline at 1-800-527-1953 . We can help you with in-stallation, operations, troubleshooting, or maintenance. Before you call, write down the model and serial number from the water heater’s data plate.
Incorrect installation, operation, or service can damage the water heater,
your house and other property, and present risks including fire, scalding,
electric shock, and explosion, causing serious injury or death.
AHRI Certification® applies to residential electric water heaters with rated
capacities of 20 to 120 gallon and input ratings of 12 kw or less.
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.
COMPLETED INSTALLATION ( TYPICAL )
IMPORTANT SAFETY INFORMATION
Read and follow all safety messages and instructions in this manual.
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
instructions, 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 indicates hazardous situation that, if not avoided, will result in
death or serious injury.
WARNING indicates a hazardous situation that, if not avoided, could result
in death or serious injury.
CAUTION indicates a hazardous situation that, if not avoided, could result
in minor or moderate injury.
NOTICE indicates practices not related to physical injury.
Important information to keep
Fill out this section and keep this manual in the pocket of the water heater
for reference.
Date Purchased: ———–
Model number: ————-
Serial number: ————–
Maintenance performed: ————
Date: —————–
Drain and flush the tank and remove the anode rod and inspect after the first six months of operation and at least annually thereafter. 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 attached to the T&P Relief Valve, follow the instructions in the T&P Relief Valve Maintenance section of this manual. See the Maintenance section for more information 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.
To reduce the risk of property damage, serious injury or death, read and
follow the precautions below, all labels on the water heater, and the safety
messages and instructions throughout this manual.
RISKS DURING INSTALLATION AND MAINTENANCE
Electric Shock Risk
Contact with the electrical parts in the junction box and behind the access
doors can result in severe injury or death from electrical shock:
- Disconnect power by opening the circuit breaker or removing the fuses before installing or servicing.
- Use a non-contact circuit tester to confirm that power is off before working on or near any electrical parts.
- Replace the junction box cover and access doors after servicing.
Lifting Risk
WARNING! The water heater is heavy. Follow these precau-tions to reduce
the risk of property damage, injuries from lifting or impact injuries from
dropping the water heater.
- Use at least two people to lift the water heater.
- Be sure you both have a good grip before lifting.
Use an appliance dolly or hand truck to move the water heater.
Scalding Risk
This water heater can make water hot enough to cause severe burns instantly,
resulting in severe injury or death.
- Feel water before bathing or showering
- To reduce the risk of scalding, install Thermostatic Mixing Valves (tempera-ture limiting valves) at each point-of-use. These valves automatically mix hot and cold water to limit the temperature at the tap. Mixing valves are available from your local plumbing supplier. Follow manufacturer’s instructions for installation and adjust-ment of the valves.
- The thermostat(s) on this water heater have been factory set to approximately 120°F to reduce the risk of scalding. Higher temperatures increase the risk of scalding, but even at 120°F, 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) | 11/2 to 2 minutes |
| 130°F (54°C) | About 30 seconds |
| 135°F (57°C) | About 10 seconds |
| 140°F (60°C) | Less than 5 seconds |
| 145°F (63°C) | Less than 3 seconds |
| 150°F (66°C) | About 11/2 seconds |
| 155°F (68°C) | About 1 second |
For information about changing the actory thermostat setting(s), refer to the
“Adjusting Temperature” section in this manual (“Step 11” on page 15).
Even if you set the water heater thermostat(s) to a low 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
thirty degrees hotter than the thermo-stat 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 tempera-tures.
If the water heater is in a hot envi-ronment, the water in the tank can become
as hot as the surrounding air, regardless of the thermostat setting.
If the water supplied to the water heater is pre-heated (for example, by fa
solar system) the temperature in the tank may be higher than the water
heater’s thermostat setting.
To reduce the risk of unusually hot wa-ter reaching the fixtures in the house,
install Thermostatic Mixing Valves at each point-of-use.
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 tempera-ture at the hot water tap, then
these precautions are particularly important.
According to a national standard Ameri-can Society of Sanitary Engineering
(ASSE 1070) and most local plumbing codes, the water heater’s thermostat
should not be used as the sole means to regulate water temperature and avoid
scalds.
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)
also kill bacteria that cause a condi-tion 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 con-taminate the potable water supply. Do not
use piping that has been treated with chromates, boiler seal, or other
chemicals.
Fire Risk
To reduce the risk of a fire that could destroy your home and serious-ly
injure or kill people:
- 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 access door covers are in place. These covers keep debris from enter-ing and potentially being ignited, and help keep any internal fires from spreading.
- Keep the water heater from 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 surround-ing insulation have been exposed to water in any way (e.g., leaks from plumbing, 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 14. Use 10 gauge solid copper wire. Use a UL listed or CSA approved strain relief. Connect ground wire to green ground screw.
Explosion Risk
High temperatures and pressures in the water heater tank can cause an
explosion 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 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 certi-fies 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 wa-
ter 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 I 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 elec-trical
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.
GETTING STARTED
 Figure 1 – Flexible connectors use compression fittings and do not require soldering.
 Figure 2 – Use a non-contact circuit tester to insure that the power is off before you work on a circuit.
 Figure 3 – Install a Pressure Reducing Valve set to 50 to 60 PSI.
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Review all of the instructions before you begin work. Improper installation 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 authorities for any local or state codes that apply to your area. In the absence of local and state codes, follow National Fire
Protection Association (NFPA-70) and the current editions of the National Electric Code (NEC) and the Inter-national Plumbing Code (IPC). The instructions in this manual comply with national codes, but the installer is responsible for complying with local codes.
Massachusetts code requires this wa-ter heater to be installed in accordance with Massachusetts 248-CMR 2.00 and 248-CMR 5.00: State Plumbing Code. Other local and state authorities may have similar requirements or other codes applicable to the installation of this water heater. -
Before you start, be sure you have, and know how to use, the following tools and supplies:
• Plumbing toolsand supplies appropriate for the type of water pipes in your home
• Threaded connectors (Figure 1) for the cold and hot water pipes
• For homes plumbed with plastic pipe, use threaded connectors suitable for the specific type of plastic 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 fittings that don’t require soldering (Figure 1). Compression fittings are easier to install than soldering copper pipes.
• Thread sealant tape or pipe joint compound approved for potable water
• Tools to make the electrical connec-tions (for example, screwdrivers, wire strippers)
• Non-Contact circuit tester to check for power (Figure 2)
• Water Pressure Gauge (see next page, Figure 4)
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Recommended Accessories:
- Suitable drain pan (see Figure 6 on page 8)
- Pressure Reducing Valve (Figure 3)
- Thermal Expansion Tank (see Figure 5 on page 7)
- Point-of-use Thermostatic Mixing Valves (see Figure 7 on page 8).
INSTALLATION
IMPORTANT: Follow these steps for proper installation:
Step 1:
Verify that your home is equipped and up-to-date for proper operation
Installing a new water heater is the perfect time to examine your home’s
plumbing system and make sure the system is up to current code standards.
There have likely been plumbing code changes since the old water heater was
installed. We recommend installing the following accessories and any other
needed changes to bring your home up to the latest code requirements.
Use the checklist below and inspect your home. Install any devices you need to
comply with codes and assure that your new water heater performs at its best.
Check with your local plumbing official for more information.
Water pressure
We recommend checking your home’s water pressure with a pressure gauge (Figure
4). Most codes allow a maximum incoming water pressure of 80 psi. We recommend
a working pres-sure no higher than 50-60 psi.
HOW: Purchase an inexpensive water pressure gauge available at your local
plumbing supplier. Connect the Water Pressure Gauge to an outside faucet and
measure the maximum water pressure experienced throughout the day (highest
water pressures often occur at night).
 Figure 4- Use a water Pressure Gauge to make sure your home’s water pressure is not too high.
To limit your home’s water pressure: Locate your home’s Pressure Reduc-ing
Valve (PRV) on the main incoming (cold) water supply line and adjust the water
pressure control to between 50 and 60 psi. If your home does not have a
Pressure Reducing Valve, install a PRV on the home’s main water supply line
and set it to between 50 and 60 psi. Pressure Reducing Valves are avail-able
at your local plumbing supplier.
BACKGROUND: Over the years, many utilities have increased water supply
pressures so they can serve more homes. In some homes today, pressures exceed
100 psi. High water pressures can damage water heaters, causing premature
leaks. If you have replaced toilet valves, had a water heater leak, or had to
repair applianc-es connected to the plumbing system, pay particular attention
to your home’s water pressure. When purchasing a PRV, make sure the PRV has a
builtin bypass.
Water pressure increase caused by thermal expansion
Verify that you have a properly sized Thermal Expansion Tank (Figure 5). We
recommend installing an expansion tank if your home does not have one. Codes
require a properly pressurized, properly sized Thermal Expansion Tank in
almost all homes. (See image on inside front cover.)
Figure 5- A Thermal Expansion Tank helps pro-tect the home’s plumbing system from pressure spikes.
HOW: Connect the Thermal Expansion Tank (available at your local plumbing
supplier) to the cold water supply line near the water heater. The expansion
tank contains a bladder and an air charge. To work properly, the Thermal
Expansion Tank must be sized according to the water heater’s tank capacity and
pressurized to match the home’s incoming water pressure. Refer to the
installation instructions provided with the Thermal Expansion Tank for instal-
lation details.
BACKGROUND: Water expands when heated, and the increased volume of water
must have a place to go, or thermal expansion will cause large in-creases in
water pressure (despite the use of a Pressure Reducing Valve on the home’s
main water supply line). The Safe Drinking Water Act of 1974 requires the use
of back flow preven-tatives and check valves to restrict water from your home
reentering the public water system. Back flow preventatives are often
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 practical 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 briefly 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 fire risk.
 Figure 6 – A suitable drain pan piped to an adequate drain can help protect flooring from leaks and drips.
- Install a suitable drain pan (available in stores) under the water heater (Figure 6) to catch condensation or leaks in the piping connections or tank. Most codes require, and we recommend, installing the water heater in a drain pan that is piped to an adequate drain. The drain pan must be at least two inches wider than the diameter of the water heater. Install the drain pan so the water level would be limited to a maximum depth of 1-3/4″.
Water temperature regulation
Install Thermostatic Mixing Valves (Figure 7) to regulate the temperature of
the water supplied to each point-of-use (for example, kitchen sink, bathroom
sink, bath, shower). Consult the valve manufacturer’s instructions or a
qualified person.
Figure 7 -Thermostatic Mixing Valves installed at each point-of-use can help prevent scalding.
WARNING! Even if the water heater thermostat is set to a relatively low
temperature, hot water can scald. Install Thermostatic Mixing Valves at each
point-of-use to reduce the risk of scalding (see page 4).
BACKGROUND: A Thermostatic 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 fixtures. If you aren’t sure
if your plumbing system is equipped with properly installed and adjusted
Thermostatic Mixing Valves at each point where hot water is used, contact a
qualified person for more information.
Step 2:
Verify that the location is appropriate
Before installing your water heater, ensure that:
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The water heater will be:
• Installed indoors close to the center of the plumbing system.
• In a suitable drain pan piped to an adequate floor drain or external to the building (See Figure 6 on page 8).
• In an area that will not freeze
• In an area that is suitable for installing the water heater vertically. -
The location has adequate space (clearances) for periodic servicing.
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The floor can support the weight of a full water heater.
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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. Contact local utilities for code requirements in your area, visit http://www.dsa.dgs.ca.gov, or call 1-916-445-8100 and request instructions. Other locations may have similar requirements. Check with your local and state authorities. -
The location is not prone to physical damage by vehicles, flooding, or other risks.
 Figure 8- In a garage, install a vehicle stop to avoid water heater damage.
- Avoid locations such as attics, I upper floors, or where a leak might damage the structure or furnishings. Due to the normal corrosive action 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 instructions. Install a suitable drain pan under the water heater piped to an adequate drain. Inspect the drain pan, pipes, and surrounding area regularly and fix any leaks found. Drain pans are available at your local plumbing supplier. Leaks are frequently in the plumbing system itself and not the water heater.
Step 3:
Removing the old water heater
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Read each installation 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 qualified person perform the installation.
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Locate the water heater’s circuit breaker and turn it OFF (or remove the circuit’s fuses).
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On the old water heater, remove the electrical junction box access panel. Using a non-contact circuit tester, check the wiring to make certain the power is OFF.
WARNING! Working on an ener-gized circuit can result in severe injury or death from electrical shock. -
Disconnect the electrical 4 wires.
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Open a hot water faucet and S let the hot water run until it is cool (This may take 10 minutes or longer).
 Figure 9- Let the hot water run until it is cool.
WARNING! Be sure the water runs cool before draining the tank to reduce the risk of scalding.- Connect a garden hose to the drain valve and place the other end of the hose in a drain, outside, or a bucket. (Note that sediment in the bottom of the tank may clog the valve and prevent it from draining. If you can’t get the tank to drain, contact a qualified person.)
- Turn the cold water supply valve OFF.
- Open the drain valve on the water heater.
Figure 10 -Draining the old water heater. - Also open a hot water faucet to help the water in the tank drain faster.
- When the tank is empty, disconnect the Temperature & Pressure (T&P) Relief Valve discharge pipe. You may be able to reuse the discharge pipe, but do not reuse the old T&P Relief Valve. A new T&P Relief Valve comes installed on your water heater (or on some models, is in the carton with the water heater).
Figure 11 -Removing the T &P Relief Valve discharge pipe. - Disconnect the water pipes. Many water pipes are connected by a threaded union which can be disconnected with wrenches. If you must cut the water pipes, cut the pipes close to the water heater’s inlet and outlet connections, leaving the water pipes as long as possible. If necessary, you can make them shorter later when you install the new water heater.
- Remove the old water heater.
WARNING! Use two or more people to remove or install water heater. Failure to do so can result in back or other injury.
Step 4:
Installing the new water heater
-
Completely read all instruc-tions before beginning. If you are not sure you can com-plete the installation, DO NOT RETURN THIS UNIT TO THE STORE. Seek assistance from any of the following sources:
• Professional Installation is available for this product and the work is guaranteed. Contact a local plumb-ing supplier to have this water heater installed.
• Schedule an appointment with a qualified person to install your water heater.
• Call our Technical Assistance Hotline at 1-800-527-1953. -
Install a suitable drain pan that is piped to an adequate drain.
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Set the water heater in place taking care not to damage the drain pan.
NOTICE: Most codes require setting 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-tion or leaks in the piping connections or tank. The drain pan must be at least two inches wider than the diam-eter of the water heater. Install the drain pan so the water level is limited to a maximum depth of 1-3/4″. -
Verify that the water heater is set in place properly. Check that:
• The T&P Relief Valve will not be in contact with any electrical parts.
• There is adequate space to install the T&P Relief Valve discharge pipe and that it can be piped to a sepa-rate drain (and not into the drain pan).
• There is adequate access and space around the water heater for future maintenance.
DO NOT CONNECT ELECTRICAL WIRING UNTIL YOU ARE INSTRUCTED TO DO SO.
NOTICE: Connecting electrical power to the tank before it is completely
full of water (water must run FULL STREAM from a hot water tap for a full
three minutes) may cause the upper heating element to burn out.
Step 5:
Connect the Tempera-ture and Pressure (T &P) Relief Valve/Pipe
Most T&P Relief Valves are preinstalled 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 instructions:
- If your water heater does not have a factory installed T&P Relief Valve, install the new T&P Relief Valve that came with your water heater. Do not reuse an old T&P Relief Valve. Install a T&P Relief Valve discharge pipe according to local codes and the following guidelines:
• The discharge pipe should be at least 3/4″ inside diameter and sloped for proper drainage. Install it to allow complete drainage of both the T&P Relief Valve and the discharge pipe.
• The discharge pipe must withstand 250°F (121°C) without distortion. Use only copper or CPVC pipe. Do not use any other type of pipe, such as PVC, iron, flexible plastic pipe, or any type of hose.
Figure 12 -The T &P Relief
Valve discharge pipe must be installed properly and piped to an adequate
drain.
• Terminate the discharge pipe a maximum of six inches above a floor 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.
Figure 13 -The end of the T &P Relief
Valve dis-charge pipe must stop no more than six inches above a floor drain or
outside.
• Do not place any valve or other restriction between the tank and T&P Relief Valve. Do not cap, block, plug, or insert any valve between the T&P Relief Valve and the end of the dis-charge pipe. Do not insert or install any reducer in the discharge pipe.
Step 6:
Install shutoff and tempering valves
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If one is not already installed, install a manual shutoff valve in the cold water line that supplies the water heater. Install the shutoff valve near the water heater so that it is readily accessible. Only use valves that are compatible with potable water. Use only fullflow ball or gate valves. Other types of valves may cause excessive restriction to the water flow.
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Install a Thermostatic Mixing Valve at each point-of-use (for example, kitchen sink, bathroom sink, bath, shower). Consult the valve manufacturer’s instructions or a qualified person. Figure 14 -Install Thermostatic Mixing Valves at each point where hot water will be used.
WARNING! Even if the water heater’s thermostat(s) are set to a relatively low temperature, hot water can scald. Install Thermostatic Mixing Valves at each point-of-use to reduce the risk of scalding. (See page 4.) -
For water heaters that are fed by a solar water heating system (or any other preheating system), always install a Thermo-static Mixing Valve or other temperature limiting device in the inlet water supply line to limit water supply inlet temperature to 120°F. Solar water heating systems can supply water with temperatures exceeding 170°F and may result in water heater malfunc-tion.
WARNING! Hot water provided by solar heating systems can cause severe burns instantly, resulting in severe injury or death (see page 4).
Step 7:
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Connect the water supply Determine the type of water pipes in your home. Most homes use copper water pipes, but some use CPVC or cross-linked polyethylene (PEX). Use fittings appropriate for the type of pipe in your home. Do not use iron or PVC pipe — they are not suitable for potable water.
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Connect the cold water supply using 3/4 inch National Pipe Thread “NPT” to the fitting marked “C” (COLD). For ease of removing the water heater for service or replacement, connect the water pipes with a coupling called a union. We recommend using a dielectrictype union, commonly available at most local plumbing suppliers. Dielectric unions can help prevent corrosion caused by tiny electric cur-rents common in copper water pipes and can help extend the life of the water heater.
IF YOU HAVE COPPER PIPES:
If your home has copper water pipes, you can solder the water pipe connec- tions or use compression fittings which don’t require soldering. Compression fittings are easier to install than soldering pipe. Check with local plumbing officials to determine what types of pipe materials are suitable for your location. Do not use lead-based solder. NOTICE: Do not solder pipes while they are attached to the water heater. The water heater’s inlet and outlet connections contain non-metallic parts which could be damaged. The proper way to connect the water heater to copper water pipes is as follows:
• Solder a short length of pipe (about a foot or so) to a threaded adapter us- ing only 95/5 tin-antimony or equiva-lent solder. Attach the threaded adapters to the water heater’s con-nections (using thread sealant tape or pipe joint compound). Connect the home’s water pipes by soldering, keeping the connections at the water heater cool with wet rags.
NOTICE: Most water heater models contain energy saving heat traps in the inlet and outlet connections to avoid the circulation of hot water within the pipes during standby. Do not remove the heat traps. -
Connect the hot water supply using 3/4 inch NPTto the fitting marked “H” (HOT). Follow the same connection guidelines as for the cold water supply.
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Install insulation (or heat tape) on the water pipes especially if the indoor installation area is subject to freezing temperatures. Insulating the hot water pipes can increase energy efficiency.
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Double check to make sure the hot and cold water pipes are connected to the correct hot and cold water fittings on the water heater.
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If needed, install (or adjust) the home’s Pressure Reducing Valve to 50-60 psi and install a Thermal Expansion Tank. Figure 15 -A Pressure Reducing Valve is required if your home’s water pressure is above 80 psi.
Figure 16 -The Thermal Expansion Tank should be pressurized with air, to match the home’s incoming water pressure.
Step 8:
Verify connections and completely fill tank
To remove air from the tank and allow the tank to fill completely with water,
follow these steps:
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Remove the aerator at the nearest hot water faucet. This allows any debris in the tank or plumbing system to be washed out.
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Turn the cold water supply back on.
Figure 17 -Fully open the cold water supply valve. -
Open a hot water faucet and allow the water to run until it flows with a full stream.
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Let the water run full stream for three full minutes.
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Close the hot water faucet and replace the aerator.
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Check inlet and outlet connections 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 connections and are not a tank leak.
NOTICE: The tank must be com-pletely empty of air and full of water
before connecting electrical power to avoid “Dry Firing.” Dry Firing may
result in the upper ele-ment burning out. This is a com-mon installation
mistake. After you make the water connections, but before you connect the
electri-cal power, open a hot water faucet and let the water run full until
all the air is removed. Let the “hot” water run full for three minutes or
longer before connecting any electrical wires. A Dry Fired upper heating
element is an installation error and is not covered under warranty.
This model is equipped with Dry-Fire protection, which will activate an error
code if the above steps are not fully followed.
Step 9:
Make electrical connections
WARNING! Working on an ener-gized circuit can result in severe injury or
death from electrical shock.
NOTICE: Although this water heater is equipped with Dry-Fire protection, be
sure the tank is completely filled with water and all the air is purged from
the tank, before making any electrical connections.
- Be sure the electrical power to the water heater is turned OFF at the circuit breaker panel (or remove the circuit’s fuses).
- Using a non-contact circuit tester, check the wiring to make certain the power is OFF.
- Check the water heater’s data plate and ensure that the home’s voltage, wiring size (ampacity) and circuit breaker rating and type are correct for this water heater. Refer to the wiring diagram located on the water heater for the correct electrical connections. Ensure that wire sizes, type, and connections comply with all appli-cable local codes. In the absence of local codes, follow NFPA-70 and the current edition of the National Electric Code (NEC).
- Remove the cover on the electrical junction box on the top of the water heater. Figure 18- The water heater’s electrical require-ments can be determined from the data plate.
- Install wiring in an approved conduit (if required by local codes). Use a UL listed or CSA approved strain relief to secure the electrical wiring to the water heater.
- Connect the ground wire to the green ground screw. Connect the home’s two power wires to the water heater’s two power wires (black to black, red to red). Use suitable twist-on wire connector or other approved means to make the power connections.
Figure 19 -Connecting the electrical wires. - Replace the junction box cover and secure with the screws provided.
WARNING! Be sure cover is secured to reduce the risk of fire and electric shock.
Step 10:
Adjusting the Temperature
With the installation steps completed, you may adjust the water heater’s
temperature setting if desired.
WARNING! Be sure panels are secured to reduce the risk of fire and electric
shock.
-
Turn the electric power back on.
-
Set the thermostat to the desired temperature, on the control assembly (See Adjusting the Control Assembly’s Operatioal Modes found on page 17). The set point on this water heater has been factory set to approximately 120°F to reduce the risk of scald injury. You may wish to set a higher tempera-ture to provide hot water for automat-ic dishwashers or laundry machines, to provide more hot water capacity, and to reduce bacterial growth. Higher tank temperatures (140° F) kill bacteria that cause a condition known as “smelly water” and can reduce the levels of bacteria that cause water-borne diseases. See Adjusting the Control Assembly’s Operatioal Modes found on page 17.
WARNING! Higher temperatures increase the risk of scalding, but even at 1207 hot water can scald (see page 4).
If you increase the water heater’s tem-perature setting, install Thermostatic Mixing Valve(s) at each point-of-use to reduce the risk of scalding. Figure 20 – Adjust Thermostatic Mixing Va Ives at each point-of-use to 120°F or lower.
WARNING! Working near an energized circuit can result in severe injury or death from electrical shock. Check wires with a circuit tester to make sure power is off. -
Wait for the water to heat up. It may take several hours for a tank of cold water to heat up. If you have no hot water after two hours, refer to the Troubleshooting Section (see page 20).
WARNING! If you have increased the temperature setting and the Thermostatic Mixing Valves are not set properly (or not installed) you could scald yourself while checking the temperature. -
Check water temperature at several points of use in your home (for example, bathtub faucet, shower, or lavatory sink) and adjust the Thermostatic Mixing Valves as needed. If you aren’t sure how to adjust the Thermostatic Mixing Valve settings, or aren’t sure if you have Thermostatic Mixing Valves, contact a qualified person.
Step 11:
Operation
The water heater is now ready for normal operation. To keep your water heater
working safely and efficiently and extend its life, perform maintenance
according to the schedule on page 26.
Turn the electric power on at the circuit breaker panel, or fuse box. Power to
the water heater will allow the water heater to run a system diag-nostic. This
typically takes a few min-utes. Once complete, proceed to the Operations
section of this manual.
NOTICE: If the system diagnostic yields any codes, reference the
diagnostic codes section in this manual.
OPERATION
General Operation (Control Assembly)
IMPORTANT: On the initial start up of the unit, the water heater will go
through a seven (7) to ten (10) minute diagnostic period prior to heating the
water.
NOTICE: If the water is warm/hot, the unit will not go through the
diagnostic period.
The primary function of the control assembly is to heat the water in the tank
until it reaches the control set point. The control assembly has two means of
heating the water, the upper element and the lower element, and only energizes
one element at a time. After reaching the control set point, the temperature
in the tank is allowed to drop a pre-determined amount before the elements are
turned on again.
NOTICE: The water heater can be controlled remotely through the use of
the app over a Wi-Fi connection (see page 18).
The control logic of the control assembly is designed so that the upper
heating element will always have priority over the lower heating element when
both elements call for heat. The temperature regulation will not performed
until after the Dry-Fire detection algorithm indicates that there is
sufficient water in the tank.
Vacation Mode (Control Assembly)
To save energy, select Vacation mode to lower the temperature setting on
the thermostat if you plan to be away for an extended time.
NOTICE: Vacation mode has a fixed set point of 50°F/10°C.
When Vacation mode is selected, the vacation timer will be displayed. The
default vacation days are preset at 7 days. Press the Up and Down button to
modify the timer to desired number of vacation days (setting range: 1 to 99
days or permanently ON). The vacation timer will blink on the display; press
the Enter button to confirm the vacation timer. To deactivate Vacation mode,
press the Vacation mode button to return to the previous operating mode or
press the button for any other desired mode.
When the vacation days decrease to 9 hours remaining, the Control Assembly
will automatically switch to the previously selected mode.
NOTICE: Normally, the display will only show the remaining vacation days.
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.
Need Assistance?
Call our Technical Assistance Hotline at
1-800-527-1953. We can help you
with installation, operation, troubleshooting, or maintenance. Before you
call, write down the model and serial number from the water heater’s data
plate.
Adjusting the Control Assembly’s Operational Modes
Water Temperature Adjustment
IMPORTANT: On the initial start up of the unit, the water heater will go
through a seven (7) to ten (10) minute diagnostic period prior to heating the
water. Before attempting to adjust the thermostat, read the “Important Safety
Information” section on page 3. If the instructions are not clear, contact a
qualified service technician.
The water temperature can be adjusted from 95° F to 150° F by pressing the
followed by the button to set the desired temperture. The control assembly is
unlocked by default To lock the display after setting the parameters, hold the
button for 3 seconds.
Operating Mode Descriptions
If locked, the operating modes can be changed by holding the button for
approximately 3 seconds, then touching the desired mode icon on the control
assembly (See Figure 21).
| STANDARD – Pressing this button will allow the temperature set point to be
set directly.
---|---
| VACATION MODE – The controller adjusts the set point to approximately 50PF.
This mode is recom-mended when the water heater is not in use for a long
period of time. This mode minimizes energy consumption and prevents the water
heater from freezing during cold weather. While in Vacation Mode, pressing
“Enter” returns to Standard Mode.
| SMART GRID CONTROL – Pressing this button will enable or disable a request
for grid control (see page 19)
| CONTROL ASSEMBLY LOCK – Holding this button for more than 3 seconds switches
the lock mode on or off.
°F/°C| °F/°C – Press and hold the “Temperature Down” button, in combination
with the “Enter” button, for 3 seconds to switch temperature unit between
Fahrenheit and Celsius.
| Fault condition will display a three digit fault code with Alert Icon
flashing. (See diagnostic code chart page 20).
| Element Functioning Icon – indicates power is on at either upper or lower
element circuits.
| CAUTION INDICATOR – Indicates when there is a Warning/Fault.
DAYS | DAYS – Indicates the number of days (1 to 99+) the unit will be in
vacation mode are being set.
| LOCK – Indicates the control assembly is locked.
Smart Grid Technology
The electric Smart Grid will enable significant improvements in electric
power reliability and quality through reduction of peak power demand, while
providing consumers the knowledge and ability to manage their energy
consumption and utility costs. According to the Department of Energy (DOE),
since 1982 the growth in peak electricity demand has exceeded power
transmission growth. This has caused more frequent blackouts and service
interruptions, as well as an increase in the costly reserve capacity the power
grid requires to meet higher peak demands. The increased demand for electrical
power across the nation has also led to higher peak utility costs.
Smart appliances are one way to help mitigate this problem. By using advanced
digital communication technologies, smart appliances will be able to
communicate with local power company or home energy management systems, and
react accordingly to save energy and money. For example, during peak demand
periods the water heater may pause or delay its power consumption and thus
reduce the load on the smart utility grid. Additionally, smart appliances will
also communicate with consumers to let them know how much energy they are
consuming. This will eventually allow consumers to control their appliances,
manage energy usage, and to ultimately save money.
Home Automation, Smart Grid Control (Where Available)
Where available, grid communication adaptors called Unitary Control Modules
(UCM) may be supplied by the local power company or purchased from leading
retailers. A UCM is a direct digital thermostat that provides integrated
control of the units thermostat. Please contact your local power company for
more information.
WARNING! Electrical Shock Hazard Disconnect power before servicing. Replace
all parts and panels before operating. Failure to do so can result in death or
electrical shock.
To activate Smart Grid Control, Turn “OFF” electric power to the water heater
at the circuit breaker/fuse box. Using a non-contact circuit tester, check the
power wires to make certain the power is OFF. Remove the cover over the grid
connection pins and plug in the UCM grid communication adaptor and return
power to the water heater at the circuit breaker/fuse box. See Figure 23.
Figure 22 – Accessing Smart Grid Connection Pins
NOTICE: Use only approved grid communication adaptors. This will enable
the power company to communicate the peak demand periods for the water
heater’s power usage.
After this connection has been made, the grid control is automatically
enabled. Press Enter to confirm UCM is present. This action will be followed
by a solid LED from the grid indicator. See Figure 24.
Enabling this feature will allow acceptance of the power company communication
of grid management requests.
NOTICE: The LED will blink when the power company has control of the
unit.
 Figure 23 – Smart Grid Control Button
To disable (override) grid control, press the Smart Grid Control button. This
action will be followed by a 72 hour timer. Remove CTA 2045 UCM. Press Enter
to confirm the disconnection. The LED will turn off.
NOTICE: If the CTA 2045 UCM is not removed followed by the pressing the
Enter button, the grid will be enabled automatically once the 72 hour timer
has ended.
NOTES: —————————-
TROUBLESHOOTING
CONTROL ASSEMBLY DIAGNOSTIC CODE CHART
IMPORTANT: Before attempting to adjust the thermostat, read the “Important
Safety Information” section page 4.
If the instructions are not clear, contact a qualified person.
| ERROR CODE | INDICATES | CORRECTIVE **ACTION*** |
|---|
No Error Code Displayed
Not Enough Hot Water| High usage, plumbing leak, operating mode
adjustment.| 1. Check for plumbing leak.
2. Adjust temperature; see scald warnings on heater and in manual.
3. Contact a qualified person to perform a volume test.
No Error Code Displayed
Water Too Hot| Water temperature set too high or grounded element.|
1. Reduce temperature setting.
2. Contact a qualified person to test for the grounded element and replace if
necessary.
No Error Code Displayed
No Hot Water| No power, control panel or thermostat opera- tion| 1.
Turn off electrical power at breaker.
2. Unplug and reconnect 24 pin connector.
3. Turn on electrical power at breaker
4. Contact a qualified person to verify correct voltage to unit.
001 with an alert Icon flashing.
(also flashing red LED and beeper.)| Dry-fire, electrical power on
with the tank not completely full of water.| 1. Turn off electrical power at
breaker. Add water, open a hot water faucet to bleed all air until water flows
without air bursts.
2. Turn on electrical power at breaker.
3. See “Important Safety Information” on page 4.
002 with an alert Icon flashing.
(also flashing red LED and beeper.)| Water temperature exceeded high
limit. ECO| 1. Turn off electrical power at the breaker.
2. Press the reset button (see Figure 26).
3. Turn on electrical power at breaker.
4. If error returns contact a qualified technician to test for the grounded
element. Replace as needed.
5. If both elements test good, replace the thermostat.
6. Turn on electrical power at breaker.
003 with an alert Icon flashing.
(also flashing red LED and beeper.)| Upper thermistor sensor failure.
NOTICE: Upper thermistor sensor is part of the thermostat.| 1. Turn off
electrical power at the breaker.
2. Check electrical connections at thermostat.
3. If there are no issues with the wiring, replace the thermostat.
4. Turn on electrical power at breaker.
NOTICE: The control panel will go into Limp Mode until the failure is cor
rected. See page 22.
004 with an alert Icon flashing.
(also flashing red LED and beeper.)| Lower thermistor sensor failure.
NOTICE: Lower thermistor sensor is part of the thermostat.| 1. Turn off
electrical power at the breaker.
2. Check electrical connections at thermostat.
3. If there are no issues with the wiring, replace the thermostat.
4. Turn on electrical power at breaker.
NOTICE: The control panel will go into limp mode until the failure is cor
rected. See page 22.
ERROR CODE| INDICATES| CORRECTIVE **ACTION*
---|---|---
021 with an alert Icon flashing.
(also flashing red LED and beeper.)| Upper element circuit failure.
NOTICE: Lower element is still operable.| 1. Turn off electrical power
at the breaker.
2. Check element circuits for resistance of 5-25 ohms (replace if required).
3. Check wires at elements and thermostat for damage.
4. Turn on electrical power at breaker.
5. If the error persists, contact a qualified person.
NOTICE: The control assembly will go into limp mode until the failure is cor
rected. See page 22.
022 with an alert Icon flashing.
(also flashing red LED and beeper.)| Lower element circuit failure.
NOTICE: Upper element is still operable.| 1. Turn off electrical power
at the breaker.
2. Check element circuits for resistance of 5-25 ohms (replace if required).
3. Check wires at elements and thermostat for damage.
4. Turn on electrical power at breaker.
5. If the error persists, contact a qualified person.
NOTICE: The control assembly will go into limp mode until the failure is cor
rected. See page 22.
006 with an alert Icon flashing.
(also flashing red LED and beeper.)| Internal Processor Error
– Frequency Fault
– Standard AD Reference Fault
– Non-Volatile Memory Fault| 1. Turn off electrical power at the breaker. Now
turn on electrical power to see if error clears. If error has not cleared,
replace the control assembly.
2. Turn on electrical power at breaker.
101 with an alert Icon flashing.
(also flashing red LED and beeper.)| Upper Thermostat Error| 1. Turn
off electrical power at the breaker, check all electrical connections, and
wiring for damage.
2. Replace the thermostat.
3. Turn on electrical power at breaker.
102 with an alert Icon flashing.
(also flashing red LED and beeper.)**| Lower Thermostat Error| 1. Turn
off electrical power at the breaker, check all electrical connections, and
wiring for damage.
2. Replace the thermostat.
3. Turn on electrical power at breaker.
*These instructions are brief and intended as guidance for a qualifi ed person. If you lack the necessary skills to perform these procedures call 1-800-527-1953 for assistance.
WARNING! Working near an energized circuit can result in severe injury or
death from electrical shock.
WARNING! When you are fi nished, be sure all covers are secured to reduce the
risk of fi re and electric shock.
Limp Mode
The heater will continue operating with one failed heating element by
switching into Limp Mode. Example:
- If the control module determines that the lower thermistor or lower element has failed, the lower element call for heat will be canceled. The upper element call for heat will still allow the upper element to heat the water as needed.
- If the control module determines that the upper thermistor or upper element has failed, the lower element will be allowed to heat the water as needed.
NOTICE: The control assembly will operate in Limp Mode until the failure
is corrected.
No Hot Water
The most likely reasons for an electric water heater to produce NO hot water
are:
- No electric power—a common problem with new installations
- Burned out upper element
- Tripped Energy Cut Off (red button on electronic thermostat)
- The water heater’s inlet and outlet connections are reversed (usually only in new installations)
- Broken electronic thermostat (or wiring)
- A leak in the hot water side of the plumbing system that exceeds the water heater’s heating capacity and makes it appear that the water heater is producing little to no hot water.
Follow these steps to diagnose and correct common electrical problems:
-
Check the electric power to 1 the water heater. No hot water is often caused by a problem with the home’s electrical wiring or circuit breakers. You’ll need a non-contact circuit tester. Follow these guidelines:
• Locate the water heater’s circuit breaker and turn it off (or remove the circuit’s fuses).
• Locate the electrical junction box on top of the water heater and remove the cover.
• Identify the two power wires. The power wires are connected to the black/red wires from the water heater—the green or copper wire is the ground wire.
• Turn the circuit breaker back on (or install the fuses) and check the power on both incoming power wires using a non-contact circuit tester.
• Turn the power off and replace the cover on the electrical junction box.
If the water heater is not getting power, contact a qualified person to have your home’s wiring or circuit breakers checked. -
Check/Reset Energy Cut Off (ECO) Button.
The Energy Cut Off (ECO) shuts off power to the water heater’s elements if the temperature of the water in the tank gets too hot. If the ECO has tripped, you’ll have no hot water. A tripped ECO can usually be reset, but you should have a qualified person investigate the cause of the overheat-ing and repair the problem. Do not turn the power back on until the cause of the overheating has been identified and repaired.
To check the Energy Cut Off (ECO)
• Turn off the power to the water heater.
WARNING! Working near an energized circuit can result in severe injury or death from electrical shock. Check power wires in the electrical junction box with a non-contact circuit tester to make sure power is off.
• Press the red ECO reset button. See Figure 26.
 Figure
25 – Energy Cut Off (ECO) button
• The ECO was tripped if you hear a click when it is reset. In most cases, a tripped ECO indicates that the tank overheated due to a problem with one of the elements or thermostats—have a qualified person check the upper/lower elements and the upper/lower thermostats. Replace any of the components if necessary.
• The ECO was not tripped if you didn’t hear a click. In that case, the thermo-stats should be checked by a qualified person.
• Replace the insulation and both the upper and lower access panels.
WARNING! Be sure all covers are secured to reduce the risk of fire and electric shock.
Insufficient Hot Water or Slow Hot Water Recovery
WARNING! Because of the in-creased risk from scalding, if you set the water
heater’s thermostat higher than 120°F, Thermostatic Mixing Valves at each
point-of-use are particularly important (see page 4).
If the hot water is simply not warm enough, there are several possible causes:
- Faulty Thermostatic Mixing Valve in a faucet or shower control (check other faucets in the house for hot water)
- Temperature set too low on the control assembly
- Water heater’s capacity too small (or usage too high)
- Reversed plumbing connections or melted dip tube (usually found soon after new installation)
- Plumbing leak
- Low supply voltage
- Lower Thermistor
Thermostatic Mixing Valves. If the hot water is simply not warm enough,
make sure the faucet you are checking doesn’t have a defective Thermostatic
Mixing Valve. Many shower controls now have builtin mixing valves. If these
devices fail, they can reduce the amount of hot water the shower or faucet
delivers even though there is plenty of hot water in the tank. Always check
the water temperature at several faucets to make sure the problem is not in a
faucet or shower control.
Thermostat set too low. If the water temperature at several faucets is
too cool, adjust the thermostat(s) through the control assembly according to
the instructions on page 17 of the Operation section of this manual.
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
condition, you may be able to meet your family’s hot water needs with the
existing water heater by installing Thermostatic Mixing Valves at each point-
of-use and then turning the thermostat(s) to a higher setting. See page 15,
step 11.
You can also reduce your home’s hot water needs by washing clothes in cold
water, installing flow restrictors on shower heads, repairing leaky faucets,
and taking other conservation steps.
Reversed connections or melted dip tube. Check the hot and cold connec-
tions and make sure your home’s hot water pipe is connected to the hot wa-ter
outlet on the water heater. Usually, reversed connections are found soon after
the installation of a new unit. If copper pipes were soldered while they were
attached to the water heater, the dip tube may have melted. The dip tube is a
long plastic tube inside the tank attached to the cold water inlet. If the dip
tube has melted, it can be replaced by removing the cold water inlet con-
nection, removing the old dip tube and installing a new one.
Plumbing leak. Even a small leak in the hot water side of the home’s
plumbing system can make it appear that the water heater is producing little
to no hot water. Locate and repair the leak.
Lower heating element not working. If the lower heating element is not
working, you will have some hot water but not as much as before. Because the
lower element does most of the work, the lower element usually wears out
before the upper element. Replace the lower element if necessary (see page
26).
Temperature Too High
If the water temperature is too hot:
- Install or adjust the Thermostatic Mixing Valves for each point-of-use (see manufacturer’s instructions), or
- Adjust the temperature setting on the control assembly.
A non functioning thermostat or a shorted heating element can cause extremely
hot water. If the Temperature and Pressure Relief Valve (T&P Valve) releases
large amounts of very hot water, it is likely due to a shorted heating
element, or more rarely a non function-ing thermostat, or the thermostat does
not fit snuggly against the tank. Very high water temperatures can also cause
the Energy Cut Off (ECO) to trip (see page 22). Turn power off until this
problem is fixed.
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 utility. If the low pressure is only on the hot water
side, the primary causes of this are:
- Melted heat traps or dip tube. Sol-dering copper pipes while they are connected to the water heater can melt the heat traps inside the hot and cold water connections or the dip tube (cold water side). Melted heat traps or a melted dip tube can restrict the flow of hot water. If that’s the case, replace the heat traps or dip tube.
- Partially closed supply valve. Open the water heater’s supply valve fully.
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. Refer to Step 1 in the
Installation section of this manual for more information. A large amount of
hot water coming from the T&P discharge pipe may be due to the tank
overheating.
WARNING! Do not cap or plug the T &P relief valve or discharge pipe, and do
not operate the water heater without a functioning T&P Relief Valve – this
could cause an explosion.
Water pressure too high. High water pressure can cause the T&P Relief
Valve to drip. Install a Pressure Reduc-ing Valve (PRV) on the main cold water
supply line. Adjust the PRV to between 50 and 60 psi.
Thermal Expansion Tank. Install a Thermal Expansion Tank. If a Thermal
Expansion Tank is already installed and the T&P Relief Valve discharge pipe
drips, the Thermal Expansion Tank may be pressurized to the wrong pressure or
the internal bladder may be defective. Refer to the instructions that came
with the Thermal Expansion Tank for more information.
Debris. In rare cases, debris can stick inside the T&P Relief Valve
preventing the valve from seating 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 operating the valve, allow-ing small quantities of water to
flush out the debris. Refer to the T&P Relief Maintenance section of this
manual.
WARNING! When manually operat-ing the temperature-pressure relief valve,
make sure that no one is in front of or around the discharge outlet. The water
may be extremely hot and could cause severe bums. Also ensure that the water
discharge will not cause property damage.
If the water pressure is between 50 and 60 psi, a Thermal Expansion Tank is
installed and properly pressurized, and the valve has been cleared of any
debris, and it still drips, the valve may be broken—have a qualified person
replace the T&P relief valve.
Water Odor
Harmless bacteria normally present in tap water can multiply in water heat-ers
and give off a “rotten egg” smell. Although eliminating the bacteria that
causes “smelly water” with a Chlorina-tion system is the only sure treatment,
in some cases, the standard anode rod that came with your water heater can be
replaced with a special zinc anode rod which may help reduce or eliminate the
odor. Contact a qualified person.
NOTE: To protect the tank, an anode rod must be installed in the water
heater at all times or the warranty is void.
In cases where the “rotten egg” smell is pronounced, you can raise the tank
temperature to 140°F in order to re-duce bacteria growth in the tank.
WARNING! Because higher temperatures increase the risk of scalding, if you
set the thermostat(s) higher than 120°F, Thermostatic Mixing Valves at each
point-of-use are particularly important (see page 4).
MAINTENANCE
Routine Maintenance
Routine maintenance will help your water heater last longer and work more
efficiently. If you can’t perform these routine maintenance tasks yourself,
contact a qualified person.
Water Heater Maintenance
After the first six months, drain and flush the water heater and inspect the
anode rod. Depending on the hard-ness of your water, repeat this process at
least annually, or more frequently if needed. From time to time you may need
to replace a heating element or the electronic thermostat. All three
maintenance tasks are described below.
Draining and Flushing the Water Heater
Tap water contains minerals that can form lime deposits on heating elements or
sediment in the bottom of the tank. The amount of lime deposits or sedi-ment
depends on the hardness of your tap water. The rate at which sediment builds
up depends on water quality and hardness in your area, the temperature
settings, and other variables. We recommend draining and flushing the water
heater after the first six months of operation to determine the amount of
sediment build up. Draining sediment extends the life of the tank, heat-ing
elements, and drain valves.
- In areas with very hard water, remove and check the heating elements whenever you drain the tank. If you have heavy lime deposits on heating elements, you will need to replace them more often.
- Sediment may form large masses that can prevent the tank from draining. Have a qualified person use a de-liming agent suitable for potable water to remove the sediment buildup.
- In most cases, it is easier and cheaper to replace lime-encrusted elements than trying to remove heavy lime deposits.
To drain and flush the tank:
-
Locate the water heater’s circuit breaker and turn it OFF (or remove the circuit’s fuses).
Figure 26 – Circuit Breaker -
Open a hot water faucet and let the hot water run until it is cool.
Figure 27- Water Faucet
WARNING! Be sure the water runs cool before draining the tank to reduce the risk of scalding. -
Connect a garden hose to the drain valve and place the other end of the hose in a drain, outside, or in buckets.
-
Turn the cold water supply valve OFF.
-
Open the drain valve on the water heater.
Figure 28 – Drain Valve -
Open a hot water faucet to help the water in the tank drain faster.
NOTICE: DO NOT turn electrical power back on unless the tank is completely full of water. -
Remove and inspect the anode rod (see Repair Parts Illustra-tion on back cover for location of the anode rod). Replace the anode rod if it is depleted. Turn power off. Run hot water until it’s cool. Turn cold water supply valve off. Open a hot water faucet to depressurize tank. Locate and remove the black plastic cover marked “Anode Rod”. Use a “key hole” saw or similar tool to remove the foam insulation covering the anode rod. Once the anode rod is exposec, use a 11/16″ socket wrench with an extension to remove it. Inspect the anode rod and replace if depleted. Apply thread sealant tape or pipe joint compound and reinstall the anode rod tightly. It is not necessary to replace the foam removed to access the anode. Turn cold water supply valve on. When hot water runs full, close hot water faucet. Check for leaks and repair if necessary. Turn power on.
Figure 29- Anode Rods from new (top) to partially depleted (m iddle) to fully depleted (bottom).
Anode Rod. The anode rod is a sacrificial metal rod that helps reduce corrosion and premature failure (leaks) in the tank. The anode rod is a consumable item. Inspect the anode rod after the first six months of operation when you drain and flush the tank. Replace the anode rod if it is substantially worn out or depleted. Thereafter, inspect the anode rod an- nually or more frequently if needed. If you use a water softener, 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 qualified person replace it. (Anode rods are a consumable item and are not covered under warranty). -
If the sediment was present when the tank was drained, flush the tank by opening the cold water supply valve and letting the water run until no more sediment drains from the tank. Close the drain valve when you are done.
NOTICE: Do not turn power back on until the tank is completely full of water. For complete instructions on filling the tank, follow Step 8 in the Installa-tion section. -
Refill 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 activate the DryFire diagnostic code. Once you are certain the tank is completely full of water, close the hot water faucet.
-
Restore power to the water heater. It may take two hours for the tank to heat up.
Replacing the Heating Element
WARNING! Working on 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 finished, be sure all
covers are secured to reduce the risk of fire and electric shock.
If you are not comfortable replacing a heating element or thermostat yourself,
have this work done by a qualified person. To replace the heating ele-ment,
you’ll need the following tools and supplies:
 Figure 30 – Non-Contact Circuit Tester
- Always turn power OFF and check the power wires with a non-contact circuit tester before working on the water heater.
Figure 31 – Heating Element (with gasket) - Check your water heater’s data plate for the correct wattage and voltage. Heating elements are available at your local plumbing supplier.
Figure 32 – Element Wrench - Some regular sockets (11/2 inch) may work, but regular sockets are often 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 flat blade and a Phillips screwdriver
- Always turn power OFF and check the power wires with a non-contact circuit tester before working on the water heater.
Steps for Replacing the Heating Element:
NOTE: A diagnostic code (Pg.20) should indicate if the upper or lower
element has failed.
-
Turn the power OFF at the 1 circuit breaker or remove fuses.
Figure 33 – Circuit Breaker -
Open the electrical junction box on top of the water heater. Using a non-contact circuit tester, check the power wires to make certain the power is OFF.
Figure 34- Non-Contact Circuit Tester -
Open a hot water faucet and let the hot water run until it is cool.
Figure 35 – 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 or outside (or use buckets). Turn OFF the cold water valve that supplies the water heater. Open the drain valve on the water heater. Opening a hot water faucet will help the tank drain faster.
-
Remove the upper control assembly or lower access panel on the water heater, and then fold back the insulation and remove the plastic element/thermostat cover. Figure 36 – Control Assembly
-
With the tank drained and power off, remove the power wires from the element you intend to replace.
-
Remove the bad element using 40 an element wrench.
-
Make sure the new element is the correct replacement by referring to the water heater’s data plate for voltage and wattage information.
-
Clean the threads in the tank opening with a rag. Insert the new element equipped with a rubber gasket.
NOTE: Use a drop of hand dishwashing liquid to lubricate the gasket to help avoid damaging the gasket as it is being tightened. Tighten with an element wrench.
NOTICE: Do not turn power back on until the tank is completely full of water. For complete instructions on filling the tank, follow Step 8 in the Installation section. -
Refill 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 activate the Dry-Fire diagnostic code. Once you are certain the tank is completely full of water, close the hot water faucet. Figure 37 – Drain valve
-
Check the newly installed element for leaks. If a leak is present, tighten the element until the leak stops. If you cannot stop the leak, drain the tank and remove the element. Inspect the gasket for dam-age. If the gasket is damaged, replace the gasket and reinstall the element.
-
Once the element is successfully installed and there are no leaks, replace the power wires, thermostat cover, insulation, and control assembly or access panel. Make sure all wire connections are tight. Replace the cover on the electrical junction box.
-
Restore power to the water heater. It may take two hours for the tank to heat up.
Replacing the ElectronicThermostat
WARNING! Working on an ener-gized circuit can result in severe injury or
death from electrical shock. Turn power off. Check wires with a non-contact
circuit tester to make sure power is off. When you are finished, be sure
all covers are secured to reduce the risk of fire and electric shock.
To replace the thermostat, you’ll need the following tools and supplies:
- A non-contact circuit tester. Always turn power OFF and check with a non-contact circuit tester before working on the water heater. Figure 38 – Upper and Lower Thermostats
- Replacement thermostats are avail-able and may be ordered from the Repair Parts List on page 30 of this manual.
- A business card to check the gap between the thermostat and the tank
- Tape and a permanent marker to mark the wires
- A flat blade and a Phillips screwdriver
Steps for Replacing the Thermostat:
-
Turn the power OFF at the circuit breaker or remove fuses.
NOTICE: It is not necessary to drain the tank to replace a thermostat. -
Open the electrical junction box 2 on top of the water heater. Using a non-contact circuit tester, check the power wires to make certain the power is OFF. Figure 39 Non-Contact Grcuit Tester
-
Remove the upper control assembly or lower access panel on the water heater and carefully fold back the insulation and plastic element/thermostat cover.
-
The replacement electronic thermostat should match the original electronic thermostat.
-
Mark the wires with tape so you’ll know how to put them back on.
-
Disconnect the wires from the bad electronic thermostat and remove the electronic ther-mostat from the metal mounting clip.
-
Install the new electronic thermostat in the metal mounting clip.
-
Make sure the new thermoscat fits snugly against the tank. You should NOT be able to slip a business card between the ECO and tank. If needed, you can bend the thermostat mounting clip until the electronic thermostat fits tightly against the tank.
-
Attach the wires following the wiring diagram on the water heater’s label. Make sure all wire connections are tight.
-
Replace the plastic element/ thermostat cover, insulation, and upper control assembly or lower access panel.
-
Replace the cover on the electrical junction box.
-
Restore power to the water heater. It may take two hours for the tank to heat up.
T &P Relief Valve Maintenance
Read and follow the operating and annual maintenance instructions provided by
the manufacturer of the T&P Relief Valve (yellow label attached to T&P Relief
Valve). If no label is attached to the T&P Relief Valve, follow the
instructions in this section. Miner-als in the water can form deposits that
cause the valve to stick or create blocked passages, making the T&P Relief
Valve inoperative. Follow these guidelines:
-
At least annually, operate the T&P Relief Valve manually to ensure the waterways are clear and the valve mechanism moves freely (above). Before operating the valve manually, check that it will discharge in a place for secure disposal. If water does not flow freely from the end of the discharge pipe, turn OFF the power to the water heater. Call a qualified person to determine the cause. Figure 40 – T &P Relief Valve
WARNING! Hot water will be released. Before operating the T &P relief valve manually, check that it will discharge in a safe place. If water does not flow freely from the end of the discharge pipe, turn the power to the water heater OFF. Call a qualified person to determine the cause. -
At least every five years, have a qualified person inspect the T&P Relief Valve and discharge pipe. Damage caused by corrosive water conditions, mineral deposits, or other problems can only be determined when a qual-ified person removes and inspects the valve and its components.
-
Note that a dripping T&P Relief Valve is usually caused by the home’s water pressure being too high or the lack of a Thermal Expansion Tank. If your T&P Relief Valve drips, see page 24.
DIAGRAMS
Thermostat Wiring Diagram
BRANCH CIRCUIT SIZING GUIDE
Based on N.E.C. NFPA NO. 70 – 1999
WATT LOAD| Recommend Over Current Protection Rating| Copper Wire
Size AWG Based on N.E.C.
Table 310- 16 C)
120 V| 208 V| 240 V| 120 V| 208 V| 240 V
1500*| 15| 15| 15| 12| 14| 14
2000| 20| 15| 15| 10| 14| 14
2500| 30| 15| 15| 10| 14| 14
3000| 30| 20| 15| 8| 12| 12
3500| –| 20| 20| –| 10| 12
4000| –| 25| 20| –| 10| 10
4500| –| 30| 25| –| 10| 10
5000| –| 30| 30| –| 10| 10
5500| –| | 30| –| | 10
- Wattages less than 1500 may be wired 14 gage with a maximum 15 amp protection.
REPAIR PARTS
Repair Part Illustration
 Repair Parts
Repair parts may be ordered through your plumber, local distributor, home improvement center, or by calling 1-800-821-2017. When ordering repair parts, always give the following information:- Model, serial and product number
- Item number
- Parts description
Repair Parts List
Legend
Special anode rod (See “Anode Rod/Water Odor” section)
Temperature and Pressure Relief Valve is required, but may not be factory
installed.
Specify element type when ordering
| ITEM No. | PARTS DESCRIPTION |
|---|---|
| 1 | CONTROL ASSEMBLY |
| 2 | UPPER THERMOSTAT COVER |
| 3 | UPPER ELEMENT |
| 4 | ELEMENT GASKET |
| 5 | UPPER THERMOSTAT/ECO |
| 6 | ACCESS DOOR |
| 7 | LOWER THERMOSTAT COVER |
| 8 | LOWER ELEMENT |
| 9 | LOWER THERMOSTAT |
| 10 | DRAIN VALVE |
| 11 | TEMPERATURE AND PRESSURE RELIEF VALVE |
| 12 | JUNCTION BOX COVER |
| 13 | HEAT TRAP/OUTLET COMBINATION |
| 14 | NIPPLE W/HEAT TRAP |
| 15 | DIP TUBE (INCLUDES NIPPLE AND HEAT TRAP) |
| 16 | ANODE ROD |
Copyright © 2021, A. O. Smith
All Rights Reserved. Printed in the U.S.A.
100354544_2000609845_REV. A
January 2022
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