Rheem Water Heater AP10414 9 User Guide

Use & Care Manual  
With Installation Instructions for the Installer  
Electric  
Water Heaters  
For Manufactured Housing (Mobile Home)  
Single and Double  
Element Models  
Side or Top  
Water Connections  
Residential 20–52 Gallon  
The purpose of this manual is twofold: one,  
to provide the installer with the basic  
directions and recommendations for the  
proper installation and adjustment of the  
water heater; and two, for the  
owner–operator, to explain the features,  
operation, safety precautions, maintenance  
and troubleshooting of the water heater.  
This manual also includes a parts list.  
It is imperative that all persons who are  
expected to install, operate or adjust this  
water heater read the instructions carefully  
so they may understand how to perform  
these operations. If you do not understand  
these instructions or any terms within it,  
seek professional advice.  
Any questions regarding the operation,  
maintenance, service or warranty of this  
water heater should be directed to the seller  
from whom it was purchased. If additional  
information is required, refer to the section  
on “If you need service.”  
Do not destroy this manual. Please read  
carefully and keep in a safe place for  
future reference.  
Recognize this symbol as an  
indication of Important Safety  
Information!  
!
California Proposition 65 Warning:  
This product contains chemicals known  
!
to the State of California to cause  
cancer, birth defects or other  
reproductive harm.  
®
LISTED  
786H  
AP10414-9 (11/03)  
Printed in USA  
 
IMPORTANT SAFETY INFORMATION.  
READ ALL INSTRUCTIONS BEFORE USING.  
WARNING!  
WATER TEMPERATURE ADJUSTMENT  
Safety and energy conservation are factors to be considered when selecting the water  
temperature setting of water heater’s thermostat. Water temperatures above 125°F can cause  
severe burns or death from scalding. Be sure to read and follow the warnings outlined on the  
label pictured below. This label is also located on the water heater near the thermostat access  
panel.  
Time/Temperature Relationship in Scalds  
Temperature  
Time To Produce a Serious Burn  
!
D A N G E R  
120°F  
125°F  
130°F  
135°F  
140°F  
145°F  
150°F  
155°F  
More than 5 minutes  
11/2 to 2 minutes  
About 30 seconds  
About 10 seconds  
Less than 5 seconds  
Less than 3 seconds  
About 11/2 seconds  
About 1 second  
Table courtesy of Shriners Burn Institute  
The chart shown above may be used as a guide  
in determining the proper water temperature for your  
home.  
HOT  
NOTICE: Households with small children, disabled,  
or elderly persons may require a 120°F or lower thermostat  
setting to prevent contact with “HOT” water.  
BURN  
The temperature of the water in the heater is  
regulated by the adjustable surface mounted  
thermostat(s) located behind the jacket access  
panel(s). Dual element heaters have two thermostats.  
To comply with safety regulations the thermostat(s)  
were set at 120°F before the water heater was  
shipped from the factory.  
Water temperature over 125°F can  
cause severe burns instantly or  
death from scalds.  
Children, disabled and elderly are  
at highest risk of being scalded.  
The illustration at the left  
shows the temperature  
Reset button  
See instruction manual before  
setting temperature at water  
heater.  
adjustment dial used for  
setting the water  
temperature.  
Thermostat  
dial pointer  
Feel water before bathing or  
showering.  
Refer to the Operating  
Instructions in this  
manual for detailed  
instructions in how to  
adjust the thermostat(s).  
150°F  
90°F  
125°F  
TURN OFF  
POWER  
Temperature limiting valves are  
available, see manual.  
BEFORE  
SERVICING  
Thermostat  
protective  
cover  
NOTICE: Mixing valves are available for reducing point  
of use water temperature by mixing hot and cold water in  
branch water lines. Contact a licensed plumber or the  
local plumbing authority for further information.  
DANGER: Hotter water increases the potential for  
Hot Water SCALDS.  
3
 
IMPORTANT SAFETY INFORMATION.  
READ ALL INSTRUCTIONS BEFORE USING.  
WARNING!  
For your safety, the information in this manual must be followed to minimize the risk of  
fire or explosion, electric shock, or to prevent property damage, personal injury, or loss of  
life.  
Be sure to read and understand the entire Use and Care Manual before attempting to  
install or operate this water heater. It may save you time and cost. Pay particular  
attention to the Safety Instructions. Failure to follow these warnings could result in  
serious bodily injury or death. Should you have problems understanding the instructions  
in this manual, or have any questions, STOP, and get help from a qualified service  
technician, or the local electric utility.  
FOR INSTALLATIONS IN THE STATE OF CALIFORNIA  
California Law requires that residential water heaters must be braced, anchored or  
strapped to resist falling or horizontal displacement due to earthquake motions. For  
residential water heaters up to 52 gallon capacity, a brochure with generic earthquake  
bracing instructions can be obtained from: Office of the State Architect, 400 P Street,  
Sacramento, CA 95814 or you may call 916-324-5315 or ask a water heater dealer.  
However, applicable local codes shall govern installation. For residential water heaters  
of a capacity greater than 52 gallons, consult the local building jurisdiction for acceptable  
bracing procedures.  
SAFETY PRECAUTIONS  
Have the installer show you the location of the circuit breaker and how to shut it off if  
necessary. Turn off the circuit breaker if the water heater has been subjected to overheating,  
fire, flood, physical damage or if the ECO fails to shut off.  
Read this manual entirely before installing  
Do not attempt to repair or replace any part  
of your water heater unless it is specifically  
recommended in this manual. All other  
servicing should be referred to a qualified  
technician.  
or operating the water heater.  
Use this appliance only for its intended  
purpose as described in this Use and Care  
Manual.  
Be sure your appliance is properly installed  
in accordance with local codes and the  
provided installation instructions.  
READ AND FOLLOW THIS SAFETY INFORMATION  
CAREFULLY.  
SAVE THESE INSTRUCTIONS  
4
 
Installing the water heater.  
The location chosen for the water heater must take into consideration the following:  
Local Installation Regulations  
The installation of this water heater must  
be in accordance with the Manufactured  
Home Construction and Safety Standard  
(Title 24, CFR; Part 3280) and the  
following instructions; and local codes  
governing the installation of water heaters  
in manufactured homes (mobile homes).  
If additional wiring information is desired,  
the latest edition of the National Electrical  
Code is recommended. It is available from  
some local libraries or can be purchased  
from the National Fire Protection  
Association, Batterymarch Park, Quincy,  
MA 02269 as booklet ANSI/NFPA 70.  
Location  
Locate the water heater in a clean dry area  
as near as practical to the area of greatest  
heated water demand. Long uninsulated hot  
water lines can waste energy and water.  
CAUTION: The water heater should not  
be located in an area where leakage of the  
tank or connections will result in damage to  
the area adjacent to it or to lower floors of  
the structure. Where such areas cannot be  
avoided, it is recommended that a suitable  
catch pan, adequately drained, be installed  
under the water heater.  
CAUTION: DO NOT subject  
the water heater to any water  
distribution system air pressure  
test. The water heater should  
either be isolated with valves at  
the inlet and outlet water  
connections or disconnected  
during the test. Failure to properly  
Isolate the water heater during an  
air pressure test presents a hazard  
to life and property. With a water  
pressure test the water heater  
need not be isolated.  
Place the water heater in such a manner  
that the thermostat and element access  
panels can be removed to permit  
inspection and servicing such as removal  
of elements or checking controls.  
The water heater and water lines should be  
protected from freezing temperatures. Do  
not install the water heater in outdoor,  
unprotected areas.  
Make certain the floor underneath the  
water heater is strong enough to  
sufficiently support the weight of the  
water heater once it is filled with water.  
B
A—Diameter of water  
heater plus 2min.  
B—Maximum 2″  
To open drain, line  
should be at least 3/4ID  
and pitched for proper  
drainage.  
A
NOTICE: Auxiliary catch pan MUST conform to local codes.  
Catch Pan Kits are available from the store where the water heater  
was purchased, or any water heater distributor.  
Inspect Shipment  
Inspect the water heater for possible damage. Check the markings on the rating plate of  
the water heater to be certain the power supply corresponds to the water heater  
requirements.  
5
 
Installing the water heater.  
Thermal Expansion  
Determine if a check valve exists in the  
inlet water line. It may have been  
installed in the cold water line as a  
separate back flow preventer, or it may be  
part of a pressure reducing valve, water  
meter or water softerner. A check valve  
located in the cold water inlet line can  
cause what is referred to as a “closed  
water system”. A cold water inlet line  
with no check valve or back flow  
prevention device is referred to as an  
“open water system”.  
the water heater and system piping. This  
rapid pressure increase can quickly reach  
the safety setting of the relief valve,  
causing it to operate during each heating  
cycle. Thermal expansion, and the  
resulting rapid and repeated expansion and  
contraction of components in the water  
heater and piping system can cause  
premature failure of the relief valve, and  
possibly the heater itself. Replacing the  
relief valve will not correct the problem.  
The suggested method of controlling  
thermal expansion is to install an  
expansion tank in the cold water line  
between the water heater and the check  
valve. The expansion tank is designed with  
an air cushion built in that compresses as  
the system pressure increases, thereby  
relieving the over pressure condition and  
eliminating the repeated operation of the  
relief valve. Other methods of controlling  
thermal expansion are also available.  
Contact your installing contractor, water  
supplier or plumbing inspector for addition  
information regarding this subject.  
As water is heated, it expands in volume  
and creates an increase in the pressure  
within the water system. This action is  
referred to as “thermal expansion”.  
In an “open water system”, expanding  
water which exceeds the capacity of the  
water heater flows back into the city main  
where the pressure is easily dissipated.  
A “closed water system”, however,  
prevents the expanding water from flowing  
back into the main supply line, and the  
result of “thermal expansion” can create a  
rapid and dangerous pressure increase in  
NOTICE: Do not apply heat to  
the HOT or COLD water  
connections. If sweat  
connections are used, sweat  
tubing to adapter before fitting  
adapter to the water  
connections on heater. Any  
heat applied to the water  
supply fittings will  
Water Supply Connections  
Refer to the illustrations on pages 8 and 9  
for suggested typical installations. The  
installation of unions or flexible copper  
connectors is recommended on the hot and  
cold water connections so that the water  
heater may be easily disconnected for  
servicing if necessary.  
CAUTION: SIDE CONNECT MODELS  
are equipped with a special Hot Outlet Tube  
Assembly. Do not rotate the Hot Outlet Nipple  
when making water connections. The nipple  
MUST remain in a position with the indicating  
mark facing up.  
permanently damage the dip  
tube and/or heat traps.  
The HOT and COLD water connections  
are clearly marked and are 3/4NPT on  
all models. Install a shut-off valve in the  
cold water line near the water heater.  
6
 
A new combination temperature and pressure relief valve, complying with the Standard for Relief  
Valves and Automatic Gas Shut-Off Devices for Hot Water Supply Systems, ANSI Z21.22, is supplied  
and must be installed in the opening provided and marked for the purpose on the water heater. No  
valve of any type should be installed between the relief valve and the tank. Local codes shall govern the  
installation of relief valves.  
Relief Valve  
The BTUH rating of the relief valve must  
not be less than the input rating of the  
water heater as indicated on the rating  
label located on the front of the heater  
(1 watt=3.412 BTUH).  
Piping used should be of a type approved  
for hot water distribution. The discharge  
line must be no smaller than the outlet of  
the valve and must pitch downward from  
the valve to allow complete drainage (by  
gravity) of the relief valve and discharge  
line. The end of the discharge line should  
not be threaded or concealed and should  
be protected from freezing. No valve of  
any type, restriction or reducer coupling  
should be installed in the discharge line.  
WARNING: The pressure  
rating of the relief valve must  
not exceed 150 PSI, the  
maximum working pressure of  
the water heater as marked on  
the rating plate.  
Connect the outlet of the relief valve  
to a suitable open drain so that the  
discharge water cannot contact live  
electrical parts or persons and to eliminate  
potential water damage.  
To Fill the Water Heater  
allow the air to vent from the water  
heater and piping.  
WARNING: The tank must be full of  
water before heater is turned on. The water  
heater warranty does not cover damage or  
failure resulting from operation with an  
empty or partially empty tank.  
A steady flow of water from the hot water  
faucet(s) indicates a full water heater.  
Make certain the drain valve is completely  
closed.  
Open the shut-off valve in the cold water  
supply line.  
Open each hot water faucet slowly to  
Condensation  
Condensation can form on the tank when  
it is first filled with water. Condensation  
might also occur with a heavy water draw  
and very cold inlet water temperature.  
Additional information on this subject  
may be found at www.rheem.com under  
“Library”. Scroll down to the Technical  
Service Bulletins 1300 Series Section and  
choose Bulletin #1303.  
This condition is not unusual, and will  
disappear after the water becomes heated.  
If, however, the condensation continues,  
examine the piping and fittings for  
possible leaks.  
7
 
Installing the water heater.  
Typical Side Connect Installation  
Anode  
To electrical  
distribution panel  
Electrical junction box  
(use only copper conductors)  
Temperature & pressure relief  
valve  
Union  
Jacket access panel  
Shut-off valve  
Hot water outlet to fixtures  
Union  
To cold water supply  
Jacket access panel  
Drain valve  
Relief valve  
discharge line.  
Directed to under  
side of home.  
Auxiliary catch pan  
Typical Top Connect Installation  
To electrical  
distribution panel  
Anode  
Temperature & pressure relief  
valve  
Heat trap  
6Min.  
Electrical junction box  
(use only copper conductors)  
D
O
C
To cold water supply  
A
L
V
E
E
L
I
E
F
HOT  
Union  
Shut-off valve  
Union  
Heat trap  
6Min.  
Jacket access panel  
Hot water outlet to fixtures  
Relief valve  
discharge line.  
Directed to under  
side of home.  
Jacket access panel  
Drain valve  
Auxiliary  
catch pan  
8
 
Ground screw  
Electrical Connections  
The branch circuit wiring should include  
either:  
A separate branch circuit with copper  
conductors, overcurrent protective device  
and suitable disconnecting means must be  
provided by a qualified electrician.  
All wiring must conform to local codes or  
latest edition of National Electrical Code  
ANSI/NFPA 70.  
The water heater is completely wired to  
the junction box inside jacket at the top  
front of the water heater. An opening for  
1/2or 3/4electrical fitting is provided  
for field wiring connections.  
ARNING  
W
Metallic conduit or metallic sheathed  
cable approved for use as a grounding  
conductor and installed with fittings  
approved for the purpose.  
Non-metallic sheathed cable, metallic  
conduit or metallic sheathed cable  
not approved for use as a ground  
conductor shall include a separate  
conductor for grounding. It should be  
attached to the ground terminals of  
the water heater and the electrical  
distribution box.  
Junction  
box cover  
Conduit  
connector  
Wire connections  
Water heater junction box.  
The voltage requirements and wattage load  
for the water heater are specified on the  
rating plate on the front of the water heater.  
CAUTION: The presence of  
water in the piping and water  
heater does not provide  
sufficient conduction for a  
ground. Non-metallic piping,  
dielectric unions, flexible  
connectors etc. can cause the  
water heater to be electrically  
isolated.  
NOTICE: This guide recommends minimum branch circuit sizing and wire size based on National Electric Code. Refer to  
wiring diagrams in this manual for field wiring connections.  
Branch Circuit Sizing and Wire Size Guide  
Total Water  
Heater Wattage  
Recommended Over Current Protection  
(fuse or circuit breaker amperage rating)  
Copper Wire Size AWG Based  
on N.E.C. Table 310-16 (75°C)  
120V  
20  
20  
25  
30  
35  
208V  
15  
15  
15  
15  
20  
25  
25  
25  
30  
30  
35  
40  
240V  
15  
15  
15  
15  
20  
20  
20  
25  
25  
30  
30  
35  
50  
120V  
12  
12  
10  
10  
8
208V  
14  
14  
14  
14  
12  
10  
10  
10  
10  
10  
8
240V  
14  
14  
14  
14  
12  
12  
12  
10  
10  
10  
10  
8
1500*  
1700  
2000  
2500  
3000  
3500  
3800  
4000  
4500  
5000  
5500  
6000  
9000  
8
8
*Less than 1500 watts may be wired 14 gauge with 15 amp protection. Check Local Electrical Codes, as they will also apply.  
9
 
Installing the water heater.  
Insulation Blankets  
Insulation blankets, available to the  
general public, for external use on electric  
water heaters are not necessary. The  
purpose of an insulation blanket is to  
reduce the standby heat loss encountered  
with storage tank heaters. This water  
heater meets or exceeds the National  
Appliance Energy Conservation Act  
standards with respect to insulation and  
standby loss requirements making an  
insulation blanket unnecessary.  
CAUTION: If local codes require the  
application of an external insulation  
blanket to this water heater, pay careful  
attention to the following so as not to  
restrict the proper function and  
WARNING: If local  
codes require external  
application of insulation  
blanket kits the  
manufacturer’s instructions  
included with the kit must  
be carefully followed.  
operation of the water heater:  
z Do not cover the operating or warning  
labels attached to the water heater or  
attempt to relocate them on the exterior  
of insulation blanket.  
z Do not apply insulation to the top of the  
water heater. this could interfere with  
the safe operation of the electrical  
junction box.  
The manufacturer’s warranty does not  
cover any damage or defect caused by  
installation, attachment or use of  
any type of energy saving or other  
unapproved devices (other than those  
authorized by the manufacturer) into, onto  
or in conjunction with the water heater.  
The use of unauthorized energy saving  
devices may shorten the life of the water  
heater and may endanger life and property.  
z Do not cover the jacket access panel(s)  
to the thermostat(s) and heating  
element(s), or pressure and temperature  
relief valve.  
z Inspect the insulation blanket frequently.  
The manufacturer disclaims any  
responsibility for such loss or injury  
resulting from the use of such  
unauthorized devices.  
Hot and Cold Pipe Insulation Installation  
HO  
T
CO
HO
CO  
Typical side piping  
arrangement  
Typical vertical piping  
arrangement  
Typical horizontal piping  
arrangement  
For increased energy efficiency, some  
water heaters have been supplied with  
two 24” sections of pipe insulation.  
Please install the insulation, according to  
the illustrations above, that best meets  
your requirements.  
10  
 
Relief Valve Insulation Installation  
CAUTION: Ensure the  
T&P Valve opening is not  
obstructed by the insulation.  
HOT  
C
OLD  
Typical top connection arrangement  
Typical side connection arrangement  
For increased energy efficiency, some  
water heaters have been supplied with  
a 2-3/8” section of pipe insulation.  
Slip the insulation cover over the T&P  
Valve through the center hole and align  
the hole in the side with the opening of  
the T&P Valve.  
Please install the insulation, according to  
the illustrations above, that best meets  
your requirements.  
Heat Trap  
NOTICE: Do not apply heat to the HOT or  
COLD water connections. If sweat  
For increased energy efficiency, some  
water heaters have been supplied with  
factory installed internal or external heat  
traps in the hot outlet and cold water inlet  
openings.  
connections are used, sweat tubing to  
adapter before fitting adapter to the water  
connections on heater. Any heat applied to  
the water supply fittings will permanently  
damage the dip tube and/or heat traps.  
11  
 
Operating the water heater.  
CAUTION: Hydrogen gas can be produced in a hot water system served by this water heater that has not been used for a  
long period of time (generally two weeks or more). HYDROGEN GAS IS EXTREMELY FLAMMABLE!! To dissipate such  
gas and to reduce risk of injury, it is recommended that the hot water faucet be opened for several minutes at the kitchen sink  
before using any electrical appliance connected to the hot water system. If hydrogen is present, there will be an unusual sound  
such as air escaping through the pipe as the water begins to flow. Do not smoke or use an open flame near the faucet at the  
time it is open.  
Safety Precautions  
Do turn off power to water heater if  
it has been subjected to over heating,  
fire, flood, physical damage.  
Operating Instructions or the  
Care and Cleaning section, it is  
recommended that a qualified person  
or serviceman perform the work.  
Do Not turn on water heater unless it  
is filled with water.  
Do Not turn on water heater if cold  
water supply shut-off valve is closed.  
If there is any difficulty in  
understanding or following the  
Safety Controls  
To reset the temperature limiting control:  
The water heater is equipped with a  
combination thermostat and temperature  
limiting control (ECO) that is located  
above the heating element in contact with  
the tank surface. If for any reason the water  
temperature becomes excessively high, the  
temperature limiting control (ECO) breaks  
the power circuit to the heating element.  
Once the control opens, it must be reset  
manually.  
CAUTION: The cause  
of the high temperature  
Turn off the power to the water  
heater.  
condition must be investigated  
by qualified service technician  
and corrective action must be  
taken before placing the water  
heater in service again.  
Remove the jacket access panel(s)  
and insulation.  
The thermostat protective cover  
should not be removed.  
Press the red RESET button.  
Replace the insulation and jacket  
access panel(s) before turning on the  
power to the water heater.  
Emergency Instructions  
WARNING: If the water heater has been  
subjected to flood, fire, or physical damage,  
turn off power and water to the water  
heater.  
Do not operate the water heater again until  
it has been thoroughly checked by  
qualified service personnel.  
12  
 
Water Temperature Setting  
The temperature of the water in the water  
heater can be regulated by setting the  
temperature dial of the adjustable surface  
mounted thermostat(s) located behind the  
jacket access panel(s).  
Water temperatures above 125°F  
can cause severe burns or death from  
scalding. Be sure to read and follow the  
warnings outlined in this manual and on  
the label on the water heater. This label is  
located on the water heater near the  
thermostat access panel.  
DANGER: Hotter water  
increases the Potential for Hot  
Water SCALDS. Households  
with small children, disabled,  
or elderly persons may require  
a 120°F or lower thermostat  
setting to prevent contact with  
HOT water.  
Dual element heaters have two  
thermostats.  
Mixing valves are available for reducing  
point of use water temperature by mixing  
hot and cold water in branch water lines.  
Contact a licensed plumber or the local  
plumbing authority for further  
Safety and energy conservation are factors  
to be considered when selecting the water  
temperature setting of the water heater’s  
thermostat(s). The lower the temperature  
setting, the greater the savings in energy  
and operating costs.  
information.  
To comply with safety regulations the  
thermostat(s) are factory set at 120°F or  
less where local codes require. This is the  
recommended starting point.  
The chart below may be used as a guide in  
determining the proper water temperature  
for your home.  
Time/Temperature Relationship in Scalds  
Temperature  
Time To Produce a Serious Burn  
120°F  
More than 5 minutes  
11/2 to 2 minutes  
125°F  
130°F  
About 30 seconds  
About 10 seconds  
Less than 5 seconds  
Less than 3 seconds  
About 11/2 seconds  
About 1 second  
135°F  
140°F  
145°F  
150°F  
155°F  
Table courtesy of Shriners Burn Institute  
If adjustment is necessary…  
Turn off the power to the water  
heater.  
Using a small screwdriver, set the  
thermostat(s) dial pointer(s) to  
the desired temperature.  
Reset button  
Remove the jacket access panel(s)  
and insulation exposing the  
thermostat(s).  
Thermostat  
dial pointer  
Replace the insulation and jacket  
access panel(s). Turn on the power to  
the water heater.  
150°F  
90°F  
125°F  
The thermostat protective cover(s)  
should not be removed.  
TURN OFF  
POWER  
BEFORE  
SERVICING  
Thermostat  
protective  
cover  
Type 59T thermostat and  
protective cover.  
13  
 
Care and cleaning of the water heater.  
Draining the Water Heater  
In order to drain the water heater, turn off  
the cold water supply. Open a hot water  
faucet or lift the handle on the relief valve  
to admit air to the tank.  
CAUTION: Shut off power to the water  
heater before draining water.  
DANGER: Before manually operating  
the relief valve, make certain no one will be  
exposed to the hot water released by the  
valve. The water drained from the tank may  
be hot enough to present a scald hazard and  
should be directed to a suitable drain to  
prevent injury or damage.  
Attach a garden hose to the drain valve on  
the water heater and direct the stream of  
water to a drain. Open the valve.  
Routine Preventative Maintenance  
Properly maintained, your water heater  
will provide years of dependable trouble-  
free service.  
A water heater’s tank can act as a setting  
DANGER: Before  
basin for solids suspended in the water.It  
is therefore not uncommon for hard water  
deposits to accumulate in the bottom of the  
tank. It is suggested that a few quarts of  
water be drained from the water heater’s  
tank every month to clean the tank of  
these deposits.  
manually operating the relief  
valve, make certain no one will  
be exposed to the danger of  
coming in contact with the hot  
water released by the valve.  
The water may be hot enough  
to create a scald hazard. The  
water should be released into a  
suitable drain to prevent  
It is suggested that a routine preventive  
maintenance program be established and  
followed by the user.  
It is further recommended that a periodic  
inspection of the operating controls,  
heating element and wiring should be  
made by service personnel qualified in  
electric appliance repair.  
Rapid closing of faucets or solenoid  
valves in automatic water using  
injury or property damage.  
appliances can cause a banging noise  
heard in a water pipe. Strategically located  
risers in the water pipe system or water  
hammer arresting devices can be used to  
minimize the problem.  
Most electrical appliances, even when  
new, make some sound when in operation.  
If the hissing or singing sound level  
increases excessively, the electric heating  
element may require cleaning. Contact a  
qualified installer or plumbing contract to  
inspect.  
The anode rod should be removed from the  
water heater’s tank annually for inspection  
and replaced when more than 6of core  
wire is exposed at either end of the rod.  
NOTICE: If the temperature  
and pressure relief valve on  
the hot water heater  
At least once a year, lift and release the  
lever handle on the temperature pressure  
relief valve, located near the top of the  
water heater, to make certain the valve  
operates freely. Allow several gallons to  
flush through the discharge line to an open  
drain.  
discharges periodically, this  
may be due to thermal  
Make sure the cold water supply is turned  
off before removing anode rod.  
expansion in a closed water  
system. Contact the water  
supplier or your plumbing  
contractor on how to correct  
this. Do not plug the relief  
valve outlet.  
NOTICE: Do not remove the anode rod  
from the water heater’s tank, except for  
inspection and/or replacement, as operation  
with the anode rod removed will shorten the  
life of the glass lined tank and will exclude  
warranty coverage.  
14  
 
Vacation and Extended Shut-Down  
NOTICE: Refer to the  
Hydrogen Gas Caution in the  
Operating Instructions.  
If the water heater is to remain idle for an  
extended period of time, the power and  
water to the appliance should be turned off checked by qualified service personnel.  
After a long shut-down period, the water  
heater’s operation and controls should be  
to conserve energy and prevent a build-up  
of dangerous hydrogen gas.  
Make certain the water heater is  
completely filled again before placing it  
in operation.  
The water heater and piping should be  
drained if they might be subjected to  
freezing temperatures.  
Anode Rod  
NOTICE: Do not remove  
the anode rod from the water  
heater’s tank, except for  
inspection and/or replacement,  
as operation with the anode  
rod removed will greatly  
shorten the life of the glass  
lined tank and will exclude  
warranty coverage.  
This water heater is equipped with an  
anode rod designed to prolong the life of  
the glass lined tank. The anode rod is  
slowly consumed, thereby eliminating or  
minimizing corrosion of the glass lined  
tank.  
Water sometimes contains a high sulfate  
and/or mineral content and together with  
cathodic protection process can produce a  
hydrogen sulfide, or rotten egg odor in the  
heated water. Chlorination of the water  
supply should minimize the problem.  
15  
 
Before You Call For Service…  
Troubleshooting Tips  
Save time and money! Review the chart on this  
page first and you may not need to call for service.  
Problem  
Possible Causes  
What To Do  
Rumbling noise  
Water conditions in your  
home caused a build up of  
scale or mineral deposits  
on the heating elements.  
Remove and clean the heating elements.  
Relief valve  
producing popping  
noise or draining  
Pressure build up caused  
by thermal expansion  
in a closed system.  
This is an unacceptable condition and must be  
corrected. Contact the water supplier or plumbing  
contractor on how to correct this. Do not plug the  
relief valve outlet.  
Rattling noise  
during periods  
of water usage  
Internal heat trap  
fittings in operation.  
This is normal for heat trap fittings when in operation  
and does not indicate a need for service.  
Not enough or  
no hot water  
Water usage may have  
exceeded the capacity  
of the water heater.  
Wait for the water heater to recover after an abnormal  
demand.  
A fuse is blown or a circuit  
breaker tripped.  
Replace fuse or reset circuit breaker.  
Electric supply may be off.  
Make sure electric supply to water heater and  
disconnect switch, if used, are in the ON position.  
The thermostat may  
be set set too low.  
See the Temperature regulation of the water heater  
section of this manual.  
Leaking or open hot  
water faucets.  
Make sure all faucets are closed.  
Electric service to your  
Contact the local electric utility.  
home may be interrupted.  
Improper wiring.  
See the Installing the water heater section of this  
manual.  
Manual reset limit (ECO)  
See the Temperature regulation of the water heater  
section of this manual.  
Cold water inlet  
temperature may be  
colder during the  
winter months.  
This is normal. The colder inlet water takes longer  
to heat.  
Water is too hot  
The thermostat  
is set too high.  
See the Temperature regulation of the water heater  
section of this manual.  
CAUTION: For your safety DO NOT attempt repair of electrical wiring, thermostats, heating elements or other safety  
devices. Refer repairs to qualified service personnel.  
16  
 
Replacement Parts.  
For 20–52 gallon models with single or double elements.  
Instructions For Placing a Parts Order  
Address parts orders to the distributor or  
store where the heater was purchased.  
Part description (as noted below) and  
number of parts desired.  
CAUTION: For your safety DO NOT  
attempt repair of electrical wiring,  
thermostat(s), heating elements or other  
operating controls. Refer repairs to qualified  
service personnel.  
All parts orders should include:  
The model and serial number of the  
water heater from the rating plate.  
Specify voltage and wattage as  
marked on the rating plate.  
Relief valve  
Dip tube (on top connect models only)  
Dip tube gasket  
(on top connect models only)  
Hot outlet heat trap  
or dip cup insert  
Some models may have  
been supplied with  
External heat traps  
(on top connect models only)  
Anode rod  
Junction box cover  
in lieu of Internal heat traps  
Dip tube gasket  
(on top connect  
models only)  
Plate cover  
Top Connect Models  
(see illustration below for other parts)  
Anode rod  
Junction box cover  
Plate cover  
Upper thermostat*  
Upper thermostat protective cover*  
Cavity insulation  
S
E
T
E
R
R
E
T
E
S
90  
140  
130  
100  
1
1
0
D
I
S
C
120  
O
-
M
-
H
E
R
T
FF  
R
O
U
RN  
E
T
W
P
O
R
E
E
FO  
IC  
I
N
G
B
RV  
SE  
Relief valve  
Jacket access cover  
Hot outlet heat tube  
(on side connect models  
only)  
Thermostat bracket*  
Shroud  
Heating element*  
Heating element gasket*  
Lower thermostat  
Lower thermostat protective cover  
Cavity insulation  
90  
140  
130  
0
10  
1
1
-
0
O
D
I
S
C
120  
-
R
M
T
H
E
FF  
R
O
N
R
T
U
W
E
P
O
R
E
E
FO  
I
N
G
B
C
I
RV  
Jacket access cover  
Thermostat bracket  
SE  
Drain valve  
Heating element  
Cold inlet nipple  
(on side connect models  
only)  
*These parts are supplied only on  
double element models  
17  
Heating element gasket  
 
Cavity Insert Instructions  
The following instructions are intended for  
qualified service personnel ONLY, and should only  
be done when necessary.  
In order to replace the thermostat or heating element,  
remove the cavity insert crossbar by following the  
instructions below:  
Turn off the power to the water heater.  
Remove the jacket access panel(s) and insulation.  
Rotate the crossbar up and down until it breaks away  
from the remainder of the cavity insert.  
(See illustration to the left)  
Discard the crossbar. It cannot and need not be  
replaced.  
Replace the thermostat and/or element as necessary.  
Replace the insulation and jacket access panel(s)  
before turning on the power to the water heater.  
NOTICE: The cavity insert crossbar is necessary for the  
manufacturing process only. The removal of the  
crossbar will not interfere with the operation of the  
water heater.  
18  
 
IF YOU NEED SERVICE  
1. Should you have any questions about your new water heater, or if it requires  
adjustment, repair, or routine maintenance, it is suggested that you first contact  
your installer, plumbing contractor or previously agreed upon service agency. In  
the event the firm has moved, or is unavailable, refer to the telephone directory,  
commercial listings or local utility for qualified service assistance.  
2. Should your problem not be solved to your complete satisfaction, you should  
then contact the Manufacturer’s National Service Department at the following  
address:  
2600 Gunter Park Drive  
Montgomery, Alabama 36109-1413  
Phone: 1-800-432-8373.  
When contacting the manufacturer, the following information will be requested:  
a. Model and serial number of the water heater as shown on the rating plate attached  
to the jacket of the heater.  
b. Address where the water heater is located and physical location.  
c. Name and address of installer and any service agency who performed service on  
the water heater.  
d. Date of original installation and dates any service work was performed.  
e. Details of the problems as you can best describe them.  
f. List of people, with dates, who have been contacted regarding your problem.  
19  
 
Wiring Diagrams — Therm-O-Disc Thermostats (Type 59T)  
DOUBLE ELEMENT  
SIMULTANEOUS OPERATION  
WITH 4 WIRE OUTLET  
DOUBLE ELEMENT  
NON-SIMULTANEOUS  
WITH 4 WIRE OUTLET  
DOUBLE ELEMENT  
NON-SIMULTANEOUS  
WITH 3 WIRE OUTLET  
DOUBLE ELEMENT  
DOUBLE ELEMENT  
FIG. A-1  
SIMULTANEOUS OPERATION  
!
NON-SIMULTANEOUS  
BRANCH CIRCUIT  
TO ELECTRICAL  
DISTRIBUTION PANEL  
CONNECTOR TO "OFF PEAK"  
METER (TIMER)  
TO SECOND POWER SOURCE,  
"OFF PEAK" METER, OR TIMER  
BRANCH CIRCUIT  
TO ELECTRICAL  
DISTRIBUTION PANEL  
BRANCH CIRCUIT  
TO ELECTRICAL  
DISTRIBUTION PANEL  
BRANCH CIRCUIT  
TO ELECTRICAL  
DISTRIBUTION PANEL  
BRANCH CIRCUIT  
TO ELECTRICAL  
DISTRIBUTION PANEL  
BRANCH CIRCUIT  
TO ELECTRICAL  
DISTRIBUTION PANEL  
TM1  
TM2  
TM2  
G
H
N
G
L1  
L2  
L1  
L2  
G
L1  
L2  
L1  
G
L2  
G
G
L1  
L2  
*
*
*
*
*
UPPER THERMOSTAT  
& HIGH TEMP.  
LIMIT (ECO)  
1
2
1
THERMOSTAT  
& HIGH TEMP.  
LIMIT (ECO)  
1
2
1
3
4
4
1
2
1
3
4
4
1
2
1
3
4
1
2
1
3
4
1
2
1
3
4
4
2
2
2
2
2
2
HEATING  
ELEMENT  
YELLOW  
YELLOW  
SINGLE ELEMENT  
120 V ONLY  
UPPER  
HEATING  
ELEMENT  
UPPER  
HEATING  
ELEMENT  
UPPER THERMOSTAT  
& HIGH TEMP. LIMIT  
(ECO)  
UPPER  
HEATING  
ELEMENT  
UPPER  
HEATING  
ELEMENT  
UPPER  
HEATING  
ELEMENT  
BRANCH CIRCUIT  
TO ELECTRICAL  
DISTRIBUTION  
LOWER  
LOWER  
LOWER  
THERMOSTAT  
& HIGH TEMP  
LIMIT (ECO)  
THERMOSTAT  
& HIGH TEMP  
LIMIT (ECO)  
THERMOSTAT  
& HIGH TEMP  
LIMIT (ECO)  
L1  
L2  
G
*
1
2
1
1
2
1
3
4
1
2
1
3
4
1
2
1
3
4
LOWER  
THERMOSTAT  
THERMOST  
AT  
& HIGH  
1
2
1
2
LOWER  
THERMOSTAT  
2
2
2
2
HEATIN  
G
LOWER  
HEATING  
ELEMENT  
LOWER  
HEATING  
ELEMENT  
LOWER  
HEATING  
ELEMENT  
LOWER  
HEATING  
ELEMENT  
LOWER  
HEATING  
ELEMENT  
SINGLE ELEMENT  
FIG. A-2  
FIG. B  
FIG. C  
FIG. D  
FIG. E  
FIG. F  
!
Grounding conductor may be required.  
Refer to Wiring Section of Manual  
This water heater is factory equipped for two (2) wire connection to  
electrical power. For use with "off-peak" meter (timer) remove wire  
nut from red and black leads and connect to "off-peak" meter (timer).  
*
20  
 

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