GE Water Heater AP13787 User Manual
!
WARNING: This water heater is not  
Use & Care Manual  
suitable for use in manufactured (mobile) homes!  
With Installation Instructions for the Installer  
®
Gas Residential  
Water Heaters  
Residential 40 and 50 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 very important 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.  
!
WARNING: If the information in these instructions is not followed exactly,  
a fire or explosion may result causing property damage, personal injury or death.  
!
!
FOR YOUR SAFETY!  
● If you cannot reach your gas supplier, call  
— Do not store or use gasoline or other flammable  
vapors or liquids or other combustible materials  
in the vicinity of this or any other appliance. To  
do so may result in an explosion or fire.  
the fire department.  
● Do not return to your home until authorized  
by the gas supplier or fire department.  
— Improper installation, adjustment, alteration,  
service or maintenance can cause property  
damage, personal injury, or death . Refer to this  
manual. Installation and service must be  
performed by a qualified installer, service  
agency or the gas supplier.  
— WHAT TO DO IF YOU SMELL GAS  
● Do not try to light any appliance.  
● Do not touch any electrical switch; do not  
use any phone in your building.  
● Immediately call your gas supplier from a  
neighbor’s phone. Follow the gas supplier’s  
instructions.  
S
I
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Manufactured under trademark license by:  
Rheem Manufacturing Company  
2600 Gunter Park Drive East, Montgomery, AL 36109-1413  
Printed in USA  
AP13787 (01/06)  
R
T
I
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®
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IMPORTANT SAFETY INFORMATION.  
READ ALL INSTRUCTIONS BEFORE USING.  
Be sure to read and understand the entire Use and Care Manual before attempting to install or operate this  
water heater. It may save you time and money. Pay particular attention to the Safety Instructions. Failure to  
follow these warnings could result in 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 gas utility.  
!
DANGER!  
INSTALL THE BLOWER ASSEMBLY AND PROPERLY VENT  
THE WATER HEATER…  
Failure to install the blower assembly and properly vent the water heater to the outdoors as  
outlined in the Venting Section of the Installation Instructions in this manual can result in  
unsafe operation of the water heater. To avoid the risk of fire, explosion, or asphyxiation from  
carbon monoxide, never operate this water heater unless it is properly vented and has an  
adequate air supply for proper operation. Be sure to inspect the vent system for proper  
installation at initial start-up; and at least annually thereafter. Refer to the Care and Cleaning  
section of this manual for more information regarding vent system inspection.  
!
WARNING!  
Gasoline, as well as other flammable materials and liquids (adhesives, solvents, paint thinners,  
etc.), and the vapors they produce are extremely dangerous. DO NOT handle, use or store  
gasoline or other flammable or combustible materials anywhere near or in the vicinity of a  
water heater or any other appliance. Be sure to read and follow the warning label pictured  
below and other labels on the water heater, as well as the warnings printed in this manual.  
Failure to do so can result in property damage, bodily injury or death.  
W A R N I N G  
!
FLAMMABLES  
Flammable Vapors  
FIRE AND EXPLOSION HAZARD  
Can result in serious injury or death.  
!
Do not store or use gasoline or other flammable vapors and liquids  
in the vicinity of this or any other appliance. Storage of or use of gasoline  
or other flammable vapors or liquids in the vicinity of this or any other  
appliance can result in serious injury or death.  
3
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IMPORTANT SAFETY INFORMATION.  
READ ALL INSTRUCTIONS BEFORE USING.  
!
DANGER!  
WATER TEMPERATURE SETTING  
Safety and energy conservation are factors to be considered when selecting the water  
temperature setting of a 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.  
Time/Temperature Relationship in Scalds  
Water 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  
!
DANGER: Households with small children,  
disabled, or elderly persons may require a 120°F  
or lower gas control (thermostat) setting to prevent  
contact with “HOT” water.  
Maximum water temperatures occur just after the  
burner has shut off. To find water temperature being  
delivered, turn on a hot water faucet and place a  
thermometer in the water stream and read the  
thermometer. (See page 23 and 24 for more details.)  
BURN  
Water temperature over 125°F can  
cause severe burns instantly or  
death from scalds.  
The temperature of the water in the heater can be  
regulated by setting the temperature dial on the  
front of the gas control (thermostat). To comply  
with safety regulations the gas control  
Children, disabled and elderly are  
at highest risk of being scalded.  
(thermostat) was set at its lowest setting before  
the water heater was shipped from the factory.  
The illustration below details the approximate water  
temperature for each mark on the Gas Control  
(Thermostat) Temperature Dial.  
See instruction manual before  
setting temperature at water  
heater.  
120°F  
Feel water before bathing or  
showering.  
Temperature limiting valves are  
available, see manual.  
90°F  
160°F  
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.  
(Vacation Setting)  
Temperatures are approximate  
!
DANGER: Hotter water increases the Potential  
4
for Hot Water SCALDS.  
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DANGER!  
LIQUEFIED PETROLEUM (LP — PROPANE OR BUTANE)  
AND NATURAL GAS MODELS  
LP and Natural gas have an odorant added to aid in detecting a gas leak. Some people may not  
physically be able to smell or recognize this odorant. If you are unsure or unfamiliar with the  
smell of LP or natural gas, ask the gas supplier. Other conditions, such as “odorant fade”, which  
causes the odorant to diminish in intensity, can also hide or camouflage a gas leak.  
● Water heaters utilizing LP gas are different  
!
DANGER: If a gas leak is present or  
from natural gas models. A natural gas  
water heater will not function safely on LP  
gas and vice versa.  
suspected:  
● Do not attempt to find the cause yourself.  
● Do not try to light any appliance.  
● Do not touch any electrical switch.  
● Do not use any phone in your building.  
● No attempt should ever be made to convert  
the water heater from natural gas to LP  
gas. To avoid possible equipment damage,  
personal injury or fire, do not connect the  
water heater to a fuel type not in  
● Leave the house immediately and make sure  
accordance with the unit data plate. LP for  
LP units. Natural gas for natural gas units.  
These units are not certified for any other  
fuel type.  
your family and pets leave also.  
● Leave the doors open for ventilation and  
contact the gas supplier, a qualified service  
agency or the fire department.  
● LP appliances should not be installed below  
grade (for example, in a basement) if such  
installation is prohibited by federal, state  
and/or local laws, rules, regulations or  
customs.  
● Stay away from the house (or building) until  
the service call has been made, the leak is  
corrected and a qualified agency has  
determined the area to be safe.  
● LP gas must be used with great caution. It  
is heavier than air and will collect first in  
lower areas making it hard to detect at  
nose level.  
● Before attempting to light the water  
heater, make sure to look and smell for gas  
leaks. Use a soapy solution to check all gas  
fittings and connections. Bubbling at a  
connection indicates a leak that must be  
corrected. When smelling to detect a gas  
leak, be sure to sniff near the floor also.  
● Gas detectors are recommended in LP &  
natural gas applications and their  
installation should be in accordance with  
the detector manufacturer’s  
recommendations and/or local laws, rules,  
regulations or customs.  
● It is recommended that more than one  
method, such as soapy solution, gas  
detectors, etc., be used to detect leaks in  
gas applications.  
5
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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.  
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 916-445-8100 or ask a water heater dealer.  
However, applicable local codes shall govern installation. For residential water heaters  
of a capacity greater than 52 gallons, consult the local building jurisdiction for acceptable  
bracing procedures.  
SAFETY PRECAUTIONS  
Have the installer show you the location of the gas shut-off valve and how to shut it off  
if necessary. Turn off the manual shut-off valve if the water heater has been subjected to  
overheating, fire, flood, physical damage or if the gas supply fails to shut off.  
● 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  
6
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Installing the water heater.  
This water heater must be installed in accordance with these instructions, local codes, utility company  
requirements, and/or in the absence of local codes, use the latest edition of the American National  
Standard/National Fuel Gas Code. A copy can be purchased from either the American Gas  
Association, 400 N. Capitol Street NW, Washington, DC 20001 as ANSI standard Z223.1 or National  
Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269 as booklet NFPA 54.  
Combustion Air  
Inlet Openings  
Location  
The water heater should not be located  
in an area where leakage from the tank  
or connections will result in damage to  
the area adjacent to the heater or to  
lower floors of the structure.  
The water heater must be located so it is  
not subject to physical damage, for example,  
by moving vehicles, area flooding, etc.  
Max.  
2”  
If local codes require the use of a stand  
kit to raise the water heater 18” above the  
floor, please contact the store where the  
water heater was purchased, or any water  
heater distributor. These kits must  
comply with local codes.  
When such areas cannot be avoided it  
is recommended that a suitable catch  
pan, adequately drained, must be  
installed under the water heater.  
Diameter of  
water heater  
plus 2” min.  
The pan must not restrict air flow to the  
combustion air inlet openings  
(perforation openings) located around  
the lower perimeter of the water heater.  
● The water heater should be installed as  
close as practical to the gas vent or  
chimney.  
The auxiliary catch pan  
installation MUST conform  
to local codes.  
● Long hot water lines should be insulated  
Catch pan kits are available from the store  
where the water heater was purchased, or  
any water heater distributor.  
to conserve water and energy.  
● The water heater and water lines  
should be protected from exposure  
to freezing temperatures.  
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.  
● Do not install the water heater in  
bathrooms, bedrooms, any occupied  
rooms normally kept closed, or in  
unprotected outdoor areas.  
A gas fired water heater or any other  
appliance should not be installed  
in a space where liquids which give off  
flammable vapors are to be used or  
stored. Such liquids include gasoline, LP  
gas (butane or propane), paint or  
adhesives and their thinners, solvents or  
removers.  
● Minimum clearance from combustible  
construction:  
Front  
Sides  
Rear  
Top  
3”  
1”  
0”  
12”  
(7.6 cm) (2.5 cm) (0 cm) (30.5 cm)  
DO NOT block or obstruct any of the  
combustion air inlet openings located  
around the perimeter of the water  
heater. A minimum of 1” is required  
between these combustion air inlet  
openings and any obstruction.  
If the clearances stated on the  
Instruction/Warning Label, located on  
the front of the heater differ, install  
the water heater according to the  
clearances stated on the label.  
● If the water heater is installed in an  
alcove or closet, the entire floor must  
be covered by a wood or metal panel.  
A minimum of 24” clearance from the  
front and top should be available for  
adequate inspection and servicing.  
DO NOT obstruct or block the  
Flammable Vapor Sensor.  
Because of natural air movement in a  
room or other enclosed space, flammable  
vapors can be carried some distance from  
where liquids which give off flammable  
vapors are to be used or stored. The open  
flame of the water heater’s pilot or main  
burner can ignite these vapors and create  
a shut down condition of the water  
heater which will not allow the water  
heater to ignite until examined by a  
Qualified Service Technician.  
!
WARNING: Combustible  
construction refers to  
adjacent walls and ceilings  
and should not be  
● The water heater may be installed on  
combustible floors, but not directly on  
carpeting. If the water heater must be  
installed on carpeting, place a metal or  
wood panel beneath the water heater,  
extending beyond its full width and  
depth at least 3” in all directions.  
confused with combustible  
or flammable products and  
materials. Combustible  
and/or flammable products  
and materials should never  
be stored in the vicinity of  
this or any gas appliance.  
7
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Installing the water heater.  
Inspect Shipment  
Inspect the water heater for possible damage. Check the markings on the rating plate  
of the water heater to be certain the type of gas supplied corresponds to the water  
heater requirements.  
Combustion and Ventilation Air  
Ventilation (ambient) air temperature  
must be 100°F or less. Proper operation must not be less than one square inch per  
The minimum net free area of each opening  
of the water heater requires air for  
combustion and ventilation. Provisions  
for combustion and ventilation air must  
comply with referenced codes and  
standards.  
1000 Btuh of the total input rating of all  
the appliances in the enclosure (but not  
less than 100 square inches), if each  
opening communicates with other  
unconfined areas inside the building.  
DO NOT block or obstruct any of the  
combustion air inlet openings located  
around the perimeter of the water  
heater. A minimum of 1” is required  
between these combustion air inlet  
openings and any obstruction.  
Buildings of unusually tight construction  
shall have the combustion and ventilation  
air supplied from outdoors, or a freely  
ventilated attic or crawl space.  
If air is supplied from outdoors, directly or  
through vertical ducts, there must be two  
openings located as specified above and  
each must have a minimum net free area  
of not less than one square inch per  
4000 Btuh of the total input rating of all  
the appliances in the enclosure.  
NOTICE: If the water heater is installed  
in an unconfined space within a building  
of conventional frame, masonry or  
metal construction, infiltration air is  
normally adequate for proper  
combustion and ventilation. If the water  
heater is installed in a confined space,  
provisions for combustion and  
If horizontal ducts are used to  
communicate with the outdoors, each  
opening must have a minimum net free  
area of not less than one square inch per  
2000 Btuh of the total input rating of all  
the appliances in the enclosure. If ducts  
are used, the minimum dimensions of  
rectangular air ducts shall not be less  
than 3”.  
ventilation air must be made.  
DO NOT obstruct or block the  
Flammable Vapor Sensor.  
A confined space is one having a volume of  
less than 50 cubic feet per 1000 Btuh of  
the aggregate input of all appliances  
within that space.  
NOTICE: If the duct openings which  
supply combustion and ventilation air  
are to be covered with a protective  
screen or grill, the net free area  
The air must be supplied through two  
permanent openings of equal area. One  
is to be located within 12” above the floor  
and the other is to be located within 12”  
from the ceiling.  
(openings in the material) of the  
covering material must be used in  
determining the size of the openings.  
Protective screening for the openings  
MUST NOT be smaller than 1/4”mesh to  
prevent clogging by lint or other debris.  
Corrosive Atmospheres  
The air in beauty shops, dry cleaning  
establishments, photo processing labs,  
Propellants from common spray cans or  
gas leaks from A/C and refrigeration  
NOTICE: The water heater  
should not be installed  
near an air supply  
containing halogenated  
hydrocarbons.  
and storage areas for liquid and powdered equipment are highly corrosive after  
bleaches or swimming pool chemicals often passing through a flame.  
contain such halogenated hydrocarbons.  
The water heater warranty is voided when  
An air supply containing halogenated  
hydrocarbons may be safe to breathe,  
but when it passes through a gas flame  
corrosive elements are released that  
will shorten the life of any gas burning  
appliance.  
failure of the heater is due to operation in  
a corrosive atmosphere.  
8
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Thermal Expansion  
Determine if a check valve exists in the inlet water line. Check with your local water  
utility. 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 softener. 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.  
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 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 (see illustration below). 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 additional information regarding this subject.  
IMPORTANT: Do not apply  
heat to the HOT or COLD  
water connections. If sweat  
connections are used,  
sweat tubing to adapter  
before fitting adapter to the  
cold water connections on  
heater. Any heat applied to  
the cold water supply  
Water Supply Connections  
Refer to the illustration below for suggested typical installation. 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. The HOT and COLD water  
connections are clearly marked and are 3/4” NPT on all models. Install a shut-off valve in the cold  
water line near the water heater.  
Typical Installation  
fittings will permanently  
damage the dip tube.  
Vent connector  
to chimney  
1/4” per foot maximum slope up  
or down for horizontal venting  
Union  
Heat trap  
Blower assembly  
Anode  
6” minimum  
Hot water outlet  
H
O
T
to fixtures  
Union  
NOTICE: The National Fuel  
Gas Code (NFGC)  
C
O
L
D
Water Heater Jacket  
Temperature and  
mandates a manual gas  
shut-off valve: See (NFGC)  
for complete instructions.  
Local codes or plumbing  
authority requirements may  
vary from the instructions  
or diagrams provided and  
take precedent over these  
instructions.  
pressure relief valve  
Manual gas shut-off  
To gas supply  
Heat trap  
6” minimum  
Shut-off  
valve  
To cold water  
supply  
Ground joint union  
Sediment trap  
Shut-off valve  
Thermal expansion  
tank (if required)  
Cap  
Relief valve  
Drain  
valve  
discharge line to  
suitable open drain.  
Thermostatic gas valve  
Jacket door  
Vacuum Relief Valve  
(Not Supplied)  
Combustion Air  
Inlet Openings  
Flammable Vapor Sensor  
Auxiliary catch pan  
6” Air gap  
Drain Pan Pipe  
to suitable drain.  
If required, install per local codes  
and valve manufacturer’s  
instructions.  
9
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Installing the water heater.  
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 remain 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 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.  
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 Btuh rating of the relief valve must  
equal or exceed the Btuh input of the  
water heater as marked on its rating plate.  
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.  
Position the outlet of the relief valve above  
a suitable open drain to eliminate  
potential water damage. Piping used  
should be of a type approved for hot  
water distribution.  
To Fill the Water Heater  
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.  
Make certain that the drain valve is  
closed, then open the shut-off valve in the  
cold water supply line.  
Open each hot water faucet slowly to  
allow the air to vent from the water  
heater and piping.  
A steady flow of water from the hot water  
faucet(s) indicates a full water heater.  
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 temperatures.  
Additional information on this subject  
may be found at www.rheem.com,  
under “Library”, scroll down to the  
Technical Service Bulletins 1400 Series  
Section and choose Bulletin #1402.  
Drops of water falling on the burner can  
produce a sizzling or pinging sound.  
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.  
10  
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WARNING: Do not attempt to convert this water heater for use with a different type of gas other than the type  
shown on the rating plate. Such conversion could result in hazardous operating conditions.  
Gas Supply  
The branch gas supply line to the water  
heater should be clean 1/2” black steel  
pipe or other approved gas piping  
material.  
resistant to the action of LP gas. Use  
compound sparingly on male threads only.  
A sediment trap should be installed at  
the bottom of the gas line.  
A ground joint union or ANSI design  
certified semi-rigid or flexible gas  
appliance connector should be installed in  
the gas line close to the water heater. The  
National Fuel Gas Code (NFGC) mandates  
a manual gas shut-off valve: See (NFGC)  
for complete instructions.  
Do not use excessive force (over 31.5 ft  
lbs.) in tightening the pipe joint at the gas  
control (thermostat) inlet, particularly if  
teflon pipe compound is used, as the valve  
body may be damaged.  
The inlet gas pressure to the water  
heater must not exceed 10.5” w.c. for  
natural gas, or 14” w.c. for LP gas. For  
purposes of input adjustment, the  
minimum inlet gas pressure (with main  
burner on) is shown on the water heater  
rating plate. If high or low gas pressures  
are present, contact your gas supplier for  
correction.  
If flexible connectors are used, the  
maximum length shall not exceed 36”.  
If lever type gas shut-offs are used,  
they shall be T-Handle type.  
Compound used on the threaded joints of  
the gas piping must be of the type  
Leak Testing  
WARNING: Never use an  
open flame to test for gas  
leaks, as property damage,  
personal injury, or death  
could result.  
The water heater and its gas connections The factory connections to the gas  
must be leak tested at normal operating  
pressures before it is placed in operation.  
control (thermostat) should also be leak  
tested after the water heater is placed in  
operation.  
Turn on the manual gas shut-off  
valve near the water heater.  
Use a soapy water solution to test  
for leaks at all connections and  
fittings. Bubbles indicate a gas leak  
that must be corrected.  
Pressure Testing the Gas Supply System  
The water heater and its manual gas  
shut-off valve must be disconnected  
The water heater must be isolated from  
the gas piping system by closing the  
from the gas supply piping system during manual gas shut-off valve during any  
any pressure testing of that system at  
pressures in excess of 3/8 psi  
(10.5” w.c.) for natural gas, or 1/2 psi  
(14” w.c.) for LP gas.  
pressure testing of the gas supply piping  
at pressures equal to or less than  
3/8 psi (10.5” w.c.) for natural gas, or  
1/2 psi (14” w.c.) for LP gas.  
High Altitude  
WARNING: Failure to  
install a water heater  
suitable for the altitude at  
the location it is intended to  
serve, can result in  
improper operation of the  
appliance resulting in  
property damage and/or,  
producing carbon monoxide  
gas, which could result in  
personal injury, or death.  
Input rating of this water heater is based  
on sea level operation. At higher  
Installations above 7,700 feet are not  
authorized.  
elevations the actual input rate may be  
lower than the value listed on the rating  
label. This water heater can be installed  
at elevation up to 7,700 feet without any  
change or modification.  
Contact the local gas supplier for more  
information.  
11  
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Installing the water heater.  
The water heater must be installed with the factory supplied blower assembly in place.  
Venting  
DANGER: Failure to  
install the blower assembly  
The water heater must be vented to the  
outdoors as described in these  
instructions. DO NOT connect this water  
heater to an existing vent or chimney - it  
must be vented separately from all other  
appliances.  
Support method used should isolate the  
and properly vent the water  
heater to the outdoors as  
outlined in the Venting  
section of this manual will  
result in unsafe operation of  
the water heater causing  
bodily injury, explosion, fire  
or death.  
vent pipe from floor joists or other  
structural members to help prevent the  
transmission of noise and vibration.  
Do not support, pin or otherwise secure  
the venting system in a way that  
restricts the normal thermal expansion  
and contraction of the chosen venting  
material.  
NOTICE: This unit can be vented using only  
the following recommended pipe material.  
Use only 2- or 3-inch diameter pipe.  
To avoid the risk of fire,  
explosion, or asphyxiation  
from carbon monoxide,  
NEVER operate the water  
heater unless it is properly  
vented and has adequate air  
supply for proper operation  
as outlined in the Venting  
section of this manual.  
If the water heater is being installed as a  
replacement for an existing power vented  
water heater, a thorough inspection of the  
existing venting system must be  
PVC (Schedule 40, ASTM D-1785)  
CPVC (Schedule 40, ASTM F-441)  
ABS (Schedule 40, ASTM D-2661)  
performed prior to any installation work.  
Verify that the correct materials as  
detailed above have been used, and that  
the minimum or maximum vent length and  
terminal locations as detailed in this  
manual have been met.  
The fittings, other than the TERMINATION,  
should be equivalent to the following:  
The vent pipe must overlap  
a minimum of ½” on each  
connection. It is important  
that the vent pipe engages  
fully into any pipe fitting  
and be kept in that position  
until the adhesive has fully  
cured. DO NOT drill or  
punch holes in the plastic  
pipe or fittings.  
PVC (Schedule 40 DWV, ASTM D-2665)  
CPVC (Schedule 40 DWV, ASTM F-438)  
ABS (Schedule 40 DWV, ASTM D-2661)  
Carefully inspect the entire venting  
system for any signs of cracks or  
fractures, particularly at the joints  
between elbows or other fittings and the  
straight runs of vent pipe.  
The unit may be vented horizontally  
through a wall or vertically through the  
roof.  
Check the system for signs of sagging or  
other stresses in the joints as a result of  
misalignment of any components in the  
system.  
Pipe runs must be adequately supported  
along both vertical and horizontal runs.  
NOTICE: This unit is  
equipped with a Flammable  
Vapor Sensor. Do not apply  
power until enough time  
has passed to allow the  
vapors from the primer and  
cement to dissipate.  
Maximum unsupported span is  
recommended to be no more than 6 feet.  
If any of these conditions are found, they  
must be corrected in accordance with the  
venting instructions in this manual before  
completing the installation and putting  
the water heater into service.  
It is imperative that the first hanger be  
located on the horizontal run immediately  
adjacent to the first 90-degree elbow  
from the vertical rise.  
Blower Assembly Installation  
Rubber  
Coupling  
Sheet Metal  
Screws  
(If not factory installed)  
Blower  
Assembly  
Connect blower assembly with the electrical connector. Attach  
Blower Assembly to top pan using the six (6) screws provided  
(See diagram to the left). Install rubber coupling (supplied in  
the box with water heater) on blower housing and secure it.  
Flue  
Baffle  
Electrical  
Connector  
NOTICE: The Blower Assembly is Btuh input specific and  
is not certified for use on any other Btuh input model.  
12  
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Maximum and Minimum Vent Lengths  
Minimum vent length for 2” vent pipe is one (1) foot of vertical pipe, one (1)  
90°elbow, and three (3) feet of horizontal pipe.  
Venting information for 2” Vents*  
NOTICE: The mixing of 2" and 3"  
vent pipe is not recommended. If  
3" pipe is used, a 2" to 3" bell  
coupling is recommended at the  
rubber coupling.  
Number of 90° elbows  
with Vent  
Number of  
45° Elbows  
Maximum Pipe Length  
in Feet (ft)  
One (1)  
One (1)  
Two (2)  
Two (2)  
None  
One (1)  
None  
44.00  
41.00  
38.00  
25.00  
This water heater is supplied with  
a two-inch Schedule 40 PVC 45°  
vent terminal. If you decide to vent  
with 3" pipe, a Schedule 40 DWV  
PVC 45° vent terminal must be  
used. For your convenience  
One (1)  
Three (3)  
None  
32.00  
screens for both 2" and 3" vent  
terminals have been included.  
* For the 2” vent, one 90° elbow is approximately equal to 6 feet of pipe. One  
45° elbow is approximately equal to 3 feet of pipe.  
Minimum vent length for 3” vent pipe is one (1) foot of vertical pipe, one (1)  
90°elbow, and four (4) feet of horizontal pipe.  
Venting information for 3” Vents**  
Number of 90° elbows  
with Vent  
Number of  
45° Elbows  
Maximum Pipe Length  
in Feet (ft)  
One (1)  
One (1)  
None  
One (1)  
None  
95.00  
92.50  
90.00  
87.50  
85.00  
82.50  
80.00  
77.50  
75.00  
Two (2)  
Two (2)  
Three (3)  
Three (3)  
Four (4)  
Four (4)  
Five (5)  
One (1)  
None  
One (1)  
None  
One (1)  
None  
** For the 3” vent, one 90° elbow is approximately equal to 5 feet of pipe.  
One 45° elbow is approximately equal to 2.5 feet of pipe.  
13  
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Installing the water heater.  
NOTICE: All pipe, fittings, solvent cement, primers and procedures must conform to American  
National Standards Institute and American Society for Testing and Materials (ANSI/ASTM) standards.  
Horizontal Vent Terminal Location  
The location of the vent terminal depends on the following  
minimum clearances and considerations (see illustration):  
Soffit vents  
Twelve (12) inches above grade level and above normal  
snow levels.  
4'  
4'  
Four (4) feet below, or four (4) feet horizontally from any  
door, window, soffit, under eave vent or gravity air inlet to  
the building or other appliances, or from gas or electric  
meters. Do not locate vent above walkways, doors, windows,  
air inlets, gas or electric meters or other equipment.  
Inside  
corner  
Electric  
meter  
4'  
4'  
Fresh  
air  
intake  
18"  
4'  
18"  
3' above  
if within 10'  
Three (3) feet above any forced air inlet located within ten  
(10) feet. Any fresh or make-up air inlet such as for a dryer  
or furnace area is considered to be a forced air inlet.  
12" (Above grade/snow level)  
window or vent  
Eighteen (18) inches from an inside corner formed by two  
exterior walls.  
Additional Considerations  
Do Not install vent terminal under any patio or deck.  
Caulk  
To help prevent moisture from freezing on walls and under  
eaves, do not locate vent terminal on the side of a building  
with prevailing winter winds.  
Rising moisture will  
collect under eaves  
If soffit vent is too  
close, block off and  
install new vent at  
another location  
Do Not terminate vent pipe directly on brick or masonry  
surfaces. Use a rust-resistant sheet metal backing plate  
(2 x 2 feet) behind vent. (See illustration.)  
(1.83 m)  
6'  
Inside  
corner  
Caulk  
6' (1.83 m)  
caulk  
Do Not locate vent terminal too close to shrubbery, as flue  
gasses may damage them.  
6' (1.83 m)  
caulk zone  
zone or to edge of  
window etc., starting  
within 6' (1.83 m)  
Caulk  
Caulk all cracks, seams and joints within six (6) feet of vent  
terminal.  
RTV silicone caulk  
All painted surfaces should be primed to lessen the chance  
of physical damage. Painted surfaces will require  
maintenance.  
2 ft. sq. (60 x 60 m) sheet metal plate  
brick or masonary surface is recomen  
4'  
(1.22 m)  
WARNING: Moisture in the flue gas will condense as  
it leaves the vent terminal. In cold weather this  
condensate can freeze on the exterior wall, under the  
eaves and on surrounding objects. Some discoloration to  
the exterior of the building is to be expected. However,  
improper location or installation can result in severe  
damage to the structure or exterior finish of the building.  
Insulate vent pipe exposed to cold conditions (attics, crawl  
spaces, etc.) with inflammable material to help prevent  
moisture from accumulating in vent pipe.  
Do Not extend exposed vent pipe outside of building.  
14  
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NOTICE: All pipe, fittings, solvent cement, primers and procedures must conform to American  
National Standards Institute and American Society for Testing and Materials (ANSI/ASTM) standards.  
Horizontal Vent Installation  
2' x 2' Sheet  
Once the vent terminal location has been determined, make a  
Metal Shieldon  
hole through the exterior wall to accommodate the vent pipe.  
Vent pipe must exit exterior wall horizontally only.  
Brick or  
Masonry Walls  
Mortar or  
Silicone Caulk  
Insert a small length of vent pipe through the wall and connect  
the coupling as shown to the left.  
Vent Terminal  
1
Vent Pipe  
with ¼2" Mesh  
Protective  
Screen Inside  
Place the 1/2" mesh metal screen inside the terminal fitting and  
connect it as shown to the vent pipe on the exterior of the  
building.  
From  
Water Heater  
Seal any opening around the vent pipe or fittings with mortar or  
silicone caulk as shown to the left.  
Pipe Coupling  
Outside of  
Building Wall  
Complete the rest of the vent pipe installation to the water  
heater's vent connector fitting on the blower outlet.  
If necessary support horizontal run as previously mentioned.  
Vertical Vent Termination Location  
The location of the vent terminal depends on the following  
minimum clearances and considerations (see illustration):  
Insert 1/2" Mesh Protective  
Screen Inside Terminal Elbow  
Minimum twelve (12) inches above roof.  
Short Piece of Vent  
Pipe  
Minimum twelve (12) inches above anticipated snow level.  
Maximum twenty-four (24) inches above roof level without  
additional support for vent.  
Four (4) feet from any gable, dormer or other roof  
structure with building interior access (i.e., vent, window,  
etc.).  
Vent Pipe  
Through  
Roof  
Min. 12" Above Roof  
Min. 12" Above  
Anticipated Snow  
Level.  
Ten (10) feet from any forced air inlet to the building. Any  
fresh or make-up air inlet such as a dryer or furnace area  
is considered to be a forced air inlet.  
Elbows  
Max. 24" Above Roof  
(Without Additional  
Support)  
Vertical Vent Installation  
Once the vent terminal location has been  
determined, make a hole through the roof  
and interior ceiling to accommodate the  
vent pipe.  
Determine the vent terminal height and  
cut vent pipe accordingly. Refer to the  
above section for proper vent terminal  
height.  
Complete the vent pipe installation to the  
water heater's vent connector fitting on  
the blower outlet.  
Connect vent elbow onto vertical pipe  
through roof.  
Connect short piece of vent pipe  
(approximately 3" long) to elbow, then  
insert 1/2" mesh metal screen into  
terminal elbow and join it to the short  
piece of vent pipe.  
Support vertical or horizontal runs as  
previously mentioned.  
Install adequate flashing where the vent  
pipe passes through the roof.  
15  
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Installing the water heater.  
Draining the Condensate  
In certain conditions, installations in  
unconditioned space or having long  
horizontal or vertical runs may  
accumulate condensate.  
Condensate is known to be acidic; refer to  
local, state (provincial) or federal codes  
for proper handling methods.  
In order to prevent condensate from  
draining back into the water heater  
installing a condensate trap and drain is  
recommended in a horizontal vent section  
as close as practical to the water heater  
vent connection.  
NOTICE: All pipe, fittings, solvent cement, primers and procedures must conform to American  
National Standards Institute and American Society for Testing and Materials (ANSI/ASTM) standards.  
Cementing Joints  
All joints in the vent piping must be  
properly sealed and the following  
materials are recommended:  
Hold the pipe fitting for 30 seconds to  
prevent the tapered socket from  
pushing the pipe out of the fitting.  
WARNING: DANGER OF  
FIRE OR BODILY INJURY -  
Solvent cements and  
primers are highly  
flammable. Provide  
PVC materials should use ASTM D-2564  
grade cement.  
Wipe all excess cement from the joint  
with a rag. Allow 15 minutes before  
handling. Cure time will vary according  
to fit, temperature and humidity.  
adequate ventilation and do  
not assemble near heat  
source or open flame. Do  
not smoke. Avoid skin or  
eye contact. Observe all  
cautions and warnings on  
material containers.  
CPVC materials should use ASTM F-493  
grade cement.  
NOTICE: Stir the solvent cement  
frequently while using. Use a natural  
bristle brush or the dauber supplied  
with the can. The proper brush size is  
one inch.  
ABS materials should use ASTM D-2235  
grade cement.  
Cleaner-Primer and Medium Body  
Solvent Cement:  
NOTICE: This unit is equipped with a  
Flammable Vapor Sensor. Do not apply  
power until enough time has passed to  
allow the vapors from the primer and  
cement to dissipate.  
Cut pipe end square, remove jagged  
edges and burrs. Chamfer end of pipe,  
then clean fitting socket and pipe joint  
area of all dirt, grease or moisture.  
CAUTION:  
For proper installation:  
DO NOT use solvent cement  
that has become curdled,  
lumpy or thickened.  
After checking pipe and socket for  
proper fit, wipe socket and pipe with  
cleaner-primer. Apply a liberal coat of  
primer to inside surface of socket and  
outside of pipe. Do not allow primer to  
dry before applying cement.  
DO NOT thin solvent  
cement. Observe shelf  
precautions printed on the  
containers.  
For applications below 32°F  
use only low temperature  
type solvent cement.  
Apply a thin coat of cement evenly in  
the socket. Quickly apply a heavy coat  
of cement to the pipe end and insert  
pipe into fitting with a slight twisting  
motion until it bottoms out.  
Appropriate solvent and  
cleaner must be used for the  
type of vent pipe used (PVC,  
CPVC or ABS).  
NOTICE: Cement must be fluid; if not,  
recoat.  
16  
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Wiring  
If local codes permit, the water heater  
may be connected to electric service with  
the power cord provided (DO NOT use an  
extension cord). A grounding receptacle is  
required.  
The maximum current draw is  
approximately 5.0 amps.  
The water heater must be electrically  
grounded in accordance with local codes,  
or, in the absence of local codes, in  
accordance with latest edition of the  
National Electric Code ANSI/NFPA No. 70.  
Refer to pictorial below for water heater  
internal wiring.  
If local codes do not permit the use of  
cord connections, a 120 V, 50/60 Hz  
power supply, with suitable disconnecting  
means, must be connected to the black  
and white leads in the heater control  
enclosure.  
NOTE: It is not recommended that this  
unit be installed on a GFCI circuit.  
A knock-out hole is provided to permit use  
of conduit or metal-clad cable connectors.  
CAUTION! Label all wires prior to disconnection  
when servicing controls. Wiring errors can cause  
improper and dangerous operation.  
VERIFY PROPER OPERATION AFTER SERVICING!  
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Installing the water heater.  
Insulation Blankets  
Insulation blankets, available to the  
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  
general public, for external use on gas  
require external application  
water heaters are not necessary. The  
of insulation blanket kits  
purpose of an insulation blanket is to  
the manufacturer’s  
instructions included with  
the kit must be carefully  
reduce the standby heat loss encountered  
with storage tank heaters. This water  
operation of the water heater:  
heater meets or exceeds the National  
Appliance Energy Conservation Act  
standards with respect to insulation and  
standby loss requirements making an  
insulation blanket unnecessary.  
followed.  
● Do not cover the operating or warning  
labels attached to the water heater or  
attempt to relocate them on the  
exterior of insulation blanket.  
ꢀ Do not apply insulation to the top of  
the water heater. This will interfere with  
the safe operation of the blower  
assembly.  
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.  
ꢀ Do not cover the burner access door,  
jacket door, gas control  
(thermostat)/gas valve or pressure and  
temperature relief valve.  
ꢀ Do not apply insulation to the bottom  
of the water heater or the area where  
the combustion air inlet openings and  
Flammable Vapor Sensor are located.  
This area must be unobstructed so as  
not to restrict combustion air flow to  
the burner or operation of the sensor.  
The manufacturer disclaims any  
responsibility for such loss or injury  
resulting from the use of such  
unauthorized devices.  
ꢀ Inspect the insulation blanket frequently  
making certain it has not sagged and it  
is not restricting the air flow to the  
combustion air inlet openings  
(perforation holes) or the Flammable  
Vapor sensor located around the lower  
perimeter of the water heater jacket.  
This could result in an unsafe operating  
condition.  
18  
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Hot and Cold Pipe Insulation Installation  
NOTICE: If pipe insulation  
is used, ensure that the  
thickness does not  
exceed ½”. Insulation  
thicker than ½” can  
interfere with the Blower  
Assembly Dilution Air  
Holes.  
H
O
T
C
O
L
D
H
O
T
C
O
L
D
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.  
Heat Trap  
For increased energy efficiency, some  
water heaters have been supplied with  
factory installed 3/4” NPT heat traps in  
the hot outlet line and cold water inlet  
line.  
These heat traps may require a minimum  
of one (1) 90° 3/4” NPT elbow and may  
require an additional 90° 3/4” NPT elbow  
or a 3/4” coupling depending on your  
installation needs. See Illustration of  
nipples and heat traps on page 31.  
During Installation of this water heater...........  
DO  
DON’T  
❑ DO check inlet gas pressure to ensure  
that it is within the range specified on the  
rating plate.  
❑ DON’T block or restrict Combustion Air  
Inlet Openings or the Flammable Vapor  
Sensor located around the lower portion of  
the water heater jacket.  
❑ DO provide adequate air for combustion  
and ventilation as discussed in the Use and  
Care Manual and the National Fuel Gas Code.  
❑ DON’T block or restrict the Blower  
Assembly Dilution Air holes.  
❑ DO maintain proper clearances to  
combustibles as specified on the rating  
plate.  
❑ DON’T remove the Burner Access Door  
unless absolutely necessary. This should  
only be done by a qualified service technician.  
A new burner access door gasket must be  
installed on any burner access door that has  
been removed.  
❑ DO allow enough time for joint cement  
vapors to dissipate BEFORE applying power  
to the water heater.  
Blower Assembly Dilution Air Holes  
❑ DO ensure that the venting system  
complies with the guidelines found in the Use  
and Care Manual and National Fuel Gas  
Code.  
Location of Dilution Air Holes  
❑ DON’T install this water heater where  
standing water may occur. The base of the  
water heater is meant to be mounted on a  
dry surface.  
❑ DO contact a qualified service technician  
if the pilot or main burner will not stay lit. The  
burner chamber is designed to be sealed  
utilizing a gasket and tamper resistant  
screws.  
❑ DON’T operate the water heater if the  
sight glass or burner access door grommet  
is damaged or broken.  
Burner Access  
Sight Glass  
Door Grommet  
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Installation Checklist  
A. Water Heater Location  
❑
❑
Close to area of vent.  
❑
Provisions made to protect area from water  
damage.  
Indoors and protected from freezing  
temperatures.  
❑
❑
Sufficient room to service heater.  
❑
Proper clearance from combustible surfaces  
observed and water heater not installed on  
carpeted floor.  
Combustible materials, such as clothing,  
cleaning materials, rags, etc. clear of the base  
of the heater.  
❑
❑
Sufficient fresh air supply for proper  
operation of water heater.  
❑
Clearances of 1” from combustion air inlet  
openings observed  
Air supply free of corrosive elements and  
flammable vapors.  
❑
Flammable vapor sensor is not blocked.  
B. Water Supply  
❑
❑
Water heater completely filled with water.  
Air purged from water heater and piping.  
Water connections tight and free of leaks.  
❑
C. Gas Supply  
❑
Gas line equipped with shut-off valve, union  
❑
❑
Soap and water solution used to check all  
connections and fittings for possible gas leak.  
and sediment trap.  
❑
Approved pipe joint compound used.  
Gas Company inspected installation (if  
required).  
D. Relief Valve  
❑
Temperature and Pressure Relief Valve  
properly installed and discharge line run to  
open drain.  
❑
Discharge line protected from freezing.  
E. Venting  
❑
Flue baffle properly hung in top of heater’s  
flue.  
❑
❑
Single wall vent connector(s) at least 6” from  
combustible material.  
❑
❑
Blower assembly properly installed.  
Vapors from PVC cement and primer have  
dissipated prior to applying electrical power.  
Vent connector(s) pitched upward to chimney  
(¼" per foot of length minimum) .  
❑
Vent connector(s) securely fastened together  
with screws.  
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Supplemental instructions for gas water heaters  
installed in potable/space heating applications.  
Local codes or plumbing authority requirements may vary from the instructions or diagrams provided in this  
manual and take precedent over these instructions.  
Hot water  
Combination Potable and Space Heating Application  
supply to  
Tee fitting must be installed as shown.  
This ensures that any air in the water  
lines will be purged through the domestic  
water faucets and showers.  
house  
! DANGER: If this water heater is  
installed in an application intended to  
supply domestic hot water needs and  
hot water for space heating purposes,  
do not connect the heater to an existing  
heating unit or components of a heating  
system that have previously been used  
with a non drinking water system.  
Toxic chemicals such as those used for  
boiler treatment may be present and  
will contaminate the drinking water  
supply causing possible health risks.  
Never introduce toxic chemicals, such  
as those used for boiler treatment,  
into this system.  
Hot water  
supply to  
heating  
unit  
From HOT  
DANGER: When this system  
!
outlet on  
requires water for space heating at  
elevated temperatures (above 125°F  
[52°C]), a mixing or tempering valve  
must be installed in the hot water  
supply line to the house in order to  
reduce the scald hazard potential.  
water heater  
Tee fitting for vertical hot water  
supply lines  
From HOT  
Hot water  
outlet on  
supply to  
water heater  
house  
DANGER: Any piping or components  
!
used in the installation of this water  
heater in a combination potable and  
space heating application must be  
suitable for use with drinking water.  
Hot water supply  
to heating unit  
Tee fitting for horizontal hot  
water supply lines  
Typical Piping Diagram for Combination Potable/Space Heating Installation  
Air vent  
Domestic hot water supply  
Spring loaded check valve in  
heating unit hot water supply line  
Incoming cold water supply  
and cold water return line (not  
supplied with water heater)  
Heat trap  
6” Min.  
NOTICE: This check valve is  
incorporated in some heating units.  
Refer to the installation instructions  
supplied with specific heating unit  
to determine if it is required.  
Mixing or  
tempering  
valve (refer  
to warning  
above)  
Thermal expansion tank  
(if required-not supplied  
with water heater)  
H
O
T
Isolation valve in hot water supply line  
to heating unit  
C
O
L
D
Shut-off valve  
(not supplied with water heater)  
Isolation valve in cold  
water return line from  
heating unit (not  
supplied with water  
heater)  
See diagrams above for proper  
pipe application for vertical  
or horizontal supply lines  
Gas line to water heater  
Temperature and pressure  
relief valve  
Cold water return  
line from heating unit  
Water heater jacket  
Temperature and pressure  
relief valve discharge line  
Hot water  
supply line into  
heating unit  
Heating unit  
Drain valve  
(not supplied  
with water heater)  
Combustion Air Inlet Openings  
6” air gap  
21  
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Lighting the water heater.  
Before operating this water heater, be sure to read and follow the instructions on the label  
pictured below and all other labels on the water heater, as well as the warnings printed in  
this manual. Failure to do so can result in unsafe operation of the water heater resulting in  
property damage, personal injury, or death . Should you have any problems reading or  
following the instructions in this manual, STOP, and get help from a qualified person.  
22  
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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 manual gas shut-off valve if water heater  
has been subjected to over heating, fire, flood,  
physical damage or if the gas supply fails  
to shut off.  
Do Not store or use gasoline or other flammable  
vapors and liquids, such as adhesives or paint  
thinner, in vicinity of this or any other appliance.  
If such flammables must be used, open doors  
and windows for ventilation, and all gas burning  
appliances in the vicinity should be shut off including  
their pilot burners, to avoid vapors lighting.  
Do Not turn on water heater unless it is completely  
filled with water.  
Do Not turn on water heater if cold water supply  
shut-off valve is closed.  
NOTICE: Flammable vapors can be drawn by air currents  
from surrounding areas to the water heater.  
Do Not allow combustible materials such as  
newspaper, rags or mops to accumulate near  
water heater.  
If there is any difficulty in understanding or following  
the Operating Instructions or the Care and Cleaning  
section, it is recommended that a qualified person or  
serviceman perform the work.  
Operating Procedure  
This heater is equipped with a spark ignitor  
should spark, then the gas valve should open  
and the main burner ignite. After the main  
burner ignites, replace the outer door. If no  
main burner flame is established, the gas  
to light the main burner. There is no pilot  
light to be lit, but on initial start-up, it is  
recommended that the outer door be  
removed (leave inner door in place for safety) control will go through three trials for ignition  
to determine if the spark ignitor and main  
burner are operating properly.  
before going into a lock-out. A warning light  
will alert the user of this lock-out condition. If  
this happens, refer to “Troubleshooting  
Guide.”  
To put the heater into operation it is only  
necessary to turn the main manual gas valve  
to the “ON” position, plug the power cord in  
and make sure the “ON/OFF” switch located  
on the blower assembly is in the “ON”  
TO SHUT OFF WATER HEATER – Turn  
switch on the blower assembly to the “OFF”  
position and turn the main manual gas shut-  
position. Within 90 seconds the spark ignitor off valve to the “OFF” position.  
Water Temperature Setting  
The temperature of the water in the water Water temperatures above 125°F  
!
DANGER: Hotter water  
heater can be regulated by setting the  
temperature dial on the front of the gas  
control (thermostat).  
can cause severe burns or death from  
scalding. Be sure to read and follow the  
warnings outlined in this manual and on  
the label located on the water heater near  
the gas control thermostat.  
increases the Potential  
for Hot Water SCALDS.  
Households with small  
children, disabled, or elderly  
persons may require a 120°F  
or lower gas control  
(thermostat) setting to  
prevent contact with HOT  
water.  
Safety and energy conservation are  
factors to be considered when selecting  
the water temperature setting of the  
water heater’s gas control  
(thermostat(s)). The lower the  
temperature setting, the greater the  
savings in energy and operating costs.  
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. (See page 4 for more details.)  
To comply with safety regulations, the gas  
control (thermostat) was set at its  
lowest setting before the water heater was  
shipped from the factory. The  
The chart below may be used as a guide in  
determining the proper water temperature  
for your home.  
recommended starting point temperature  
is 120°F.  
23  
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Operating the water heater.  
Water Temperature Setting…  
Maximum water temperatures occur just  
after the burner has shut off. To  
determine the water temperature, turn on  
a hot water faucet and place a  
thermometer in the water stream.  
Also, always supervise young children or  
others who are incapacitated.  
The gas control (thermostat) is  
constructed with a built in safety shut-off  
device designed to shut off the gas supply  
to the burner if the pilot flame is  
extinguished for any reason.  
The large reference mark on the rim of the  
temperature dial, represents an  
approximate water temperature of 120°F.  
The gas control (thermostat) is also  
equipped with a single use gas shut off  
device that will shut off the gas supply to  
the burner if the water heater exceeds  
normal operating temperatures. Refer to  
the (Before You Call For Service) section  
of this manual, or contact your dealer.  
The smaller reference mark, to the left,  
represents an approximate water  
temperature of 130°F.  
Each reference mark above or below these  
points indicates an approximate change  
of 10°F.  
!
To adjust the temperature, turn the  
temperature dial to an initial setting of  
120°F.  
WARNING: Should overheating occur  
or the gas supply fail to shut off, turn  
off the manual gas control valve to the  
appliance.  
A condition known as “stacking” or  
“layering” can occur when a series of short  
and frequent hot water draws are taken.  
If the water heater has been subjected to  
fire, flood or physical damage, turn off the  
manual gas control (shut-off) valve, and  
do not operate the water heater again  
until it has been checked by qualified  
personnel.  
The hottest temperature water will be at  
the top of the tank, closest to the outlet  
pipe delivering hot water to the home.  
Stacking can cause this top layer of  
water to be hotter than the water toward  
the bottom of the tank near the gas  
control (thermostat).  
NOTICE: Replace any part of the gas  
control system which has been under  
water.  
Therefore, always remember to test the  
water temperature with your hand before  
use and remember that hotter water  
increases the risk of scald injury.  
Time/Temperature Relationship in Scalds  
120°F  
Water Temperature  
Time To Produce a Serious Burn  
120°F  
125°F  
More than 5 minutes  
11/2 to 2 minutes  
90°F  
130°F  
135°F  
140°F  
145°F  
150°F  
155°F  
About 30 seconds  
About 10 seconds  
Less than 5 seconds  
Less than 3 seconds  
About 11/2 seconds  
About 1 second  
160°F  
Table courtesy of Shriners Burn Institute  
(Vacation Setting)  
Temperature dial  
(Temperatures are approximate)  
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Care and cleaning of the water heater.  
Draining the Water Heater  
In order to drain the water heater, turn  
!
CAUTION: Shut off gas to the water  
off the cold water supply. Open a hot  
water faucet or lift the handle on the  
relief valve to admit air to the tank.  
heater at the gas control (thermostat)  
gas cock or manual shut-off valve  
before draining water.  
Attach a garden hose to the drain  
valve on the water heater and direct  
the stream of water to a drain. Open  
the valve.  
!
DANGER: Before manually operating  
the temperature and pressure 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.  
Routine Preventative Maintenance  
DANGER: Before  
manually operating the  
relief valve, make certain  
no one will be exposed to  
the danger of the hot water  
released by the valve. The  
water may be hot enough  
to create a scald hazard.  
The water should be  
Properly maintained, your water heater will  
provide years of dependable trouble-free  
service.  
A water heater’s tank can act as a  
settling basin for solids suspended in the  
water. It is therefore not uncommon for  
hard water deposits to accumulate in the  
bottom of the tank. If allowed to  
It is recommended that a periodic  
inspection of the gas control  
accumulate, these solids can cover the  
gas control (thermostat) sensors, causing  
the sensors to operate erratically.  
(thermostat), burner, relief valve, internal  
flue-way and venting system should be  
made by service personnel qualified in gas  
appliance repair.  
Because accumulated solids can prevent  
the gas control (thermostat) sensors  
from accurately reading the water  
released into a suitable  
drain to prevent injury or  
property damage.  
It is suggested that a routine preventative  
maintenance program be established and  
followed by the user.  
temperature, the water  
at the fixture can be hotter than the gas  
control (thermostat) dial setting. 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.  
Inspect plastic vent pipe. Make certain  
that all joints are secure and that vent  
pipe supports are all in place. Check the  
outdoor vent terminal to see that it is free  
of obstructions, and that there is no  
damage nearby caused by condensate.  
!
DANGER: Hotter water  
increases the potential for  
Hot Water Scalds.  
Rapid closing of faucets or solenoid valves  
in automatic water using 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.  
Inspect dilution air inlet. Make certain no  
blockage exists. Clean any lint, dirt or oil  
accumulation that may exist.  
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.  
The anode rod should be removed from the  
water heater’s tank annually for inspection  
and replaced when more than 6” of core  
wire is exposed at either end of the rod.  
Make sure the cold water supply is turned  
off before removing anode rod.  
Blower Assembly Dilution Air Holes  
NOTICE: If the temperature and  
pressure relief valve on the water heater  
discharges periodically, this may be due  
to thermal 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.  
Location of Dilution Air Holes  
This water heater incorporates a  
combustion shut off device that shuts the  
operation of the water heater down if  
undesirable combustion conditions occur,  
such as the presence of flammable vapors  
or blockage of the combustion air inlet  
openings. Please contact a Qualified  
Service Technician if this occurs.  
DANGER: Failure to  
perform the recommended  
Routine Preventative  
Maintenance can harm the  
proper operation of this  
water heater, which can  
cause carbon monoxide  
dangers, excessive hot water  
temperatures and other  
potentially hazardous  
conditions.  
25  
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Care and cleaning of the water heater.  
!
DANGER: Combustible  
Housekeeping  
materials, such as clothing,  
cleaning materials, or  
flammable liquids, etc., must  
not be placed against or next  
to the water heater.  
Visually inspect pilot burner and  
relight if necessary.  
When installed in a closet, DO NOT  
block or obstruct any of the  
combustion air inlet openings located  
around the perimeter of the water  
heater. A minimum of 1” is required  
between these combustion air inlet  
openings and any obstruction.  
To ensure sufficient ventilation and  
combustion air supply, proper clearances  
must be maintained.  
DO NOT obstruct or block the  
Flammable Vapor Sensor. The sensor  
does not require any maintenance or  
cleaning. DO NOT expose to cleaning  
agents.  
Venting System Inspection  
The water heater’s internal flue must be  
If after inspection of the vent system  
inspected annually to be certain it is clean you found soot or deterioration;  
by removing the blower assembly and flue  
baffle.  
call the local gas utility to correct the  
problem and clean the flue, or replace the  
flue, flue baffle, and venting system before  
resuming operation of the water heater.  
When reinstalling the flue baffle make  
certain it is hung securely by its hanger  
at the top of the flue way.  
Test for spillage at the blower assembly  
relief opening after 5 minutes of burner  
operation. Use a flame of a match or  
candle or smoke.  
Reinstall the blower assembly.  
Inspect the gas venting system and the  
chimney.  
Make certain the vent connector from the  
blower assembly to the chimney is  
properly positioned and securely attached.  
Burner Inspection  
Visually inspect the pilot burner and main  
burners annually.  
!
CAUTION: For your safety, cleaning  
of the burner must be performed only  
by qualified service personnel, as it  
involves the disconnection of gas  
piping and leak testing.. The burner  
chamber is a sealed area. If the burner  
access door is removed, the burner  
access door gasket must be replaced.  
Through the sight glass, inspect the pilot  
burner flame with the main burner off and  
inspect the main burner while firing.  
If any unusual burner operation is noted,  
the water heater should be shut off until  
qualified service assistance can be  
obtained.  
For cleaning, remove the burner from the  
water heater. A vacuum cleaner can be  
used on the burner and floor shield inside  
the water heater.The burner can also be  
cleaned by scrubbing with mild detergent.  
Proper burner pattern.  
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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  
After a long shut-down period, the water  
heater’s operation and controls should be  
checked by qualified service personnel.  
off to conserve energy and prevent a build- Make certain the water heater is  
up of dangerous hydrogen gas.  
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  
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.  
removed will greatly  
shorten the life of the glass  
lined tank and will exclude  
warranty coverage.  
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Before You Call For Service…  
Troubleshooting Tips  
Save time and money! Review the charts on the following pages first and you may not need to call  
for service.  
This water heater incorporates a combustion shut off device that shuts the operation of the water heater  
down if undesirable combustion conditions occur. Such as the presence of flammable vapors or blockage of  
the combustion air inlet openings. Please contact a Qualified Service Technician if this occurs.  
Problem  
Possible Causes  
What To Do  
Condensation  
This usually happens when  
a new water heater is  
filled for the first time.  
ꢀ This is normal. After the water in the tank warms  
up, the condensation will disappear. If, however, the  
condition persists, examine the piping and fittings  
for possible leaks.  
Moisture from the products  
of combustion condensing  
on the tank surface.  
ꢀ This is normal and will disappear in time. Excessive  
condensation can cause pilot burner outage.  
An undersized water  
heater will cause  
condensation.  
ꢀ Use a water heater size that meets the requirements  
of your needs.  
Yellow flame  
or soot  
Scale on top of the burner.  
ꢀ Contact a qualified service technician to remove scale.  
Flue or Combustion air inlet  
openings are restricted.  
Remove obstruction or debris from flue or  
combustion air inlet openings on water heater jacket.  
Not enough combustion or  
ventilation air supplied to  
the water heater location.  
ꢀ Proper operation of the water heater requires air for  
combustion and ventilation. See the Combustion and  
Ventilation Air information in the “Installing The  
Water Heater” section of this manual.  
Unable to light  
the pilot burner  
Air in gas line.  
ꢀ Contact a qualified service technician to purge the air  
from the gas line.  
Pilot burner orifice clogged.  
ꢀ The pilot burner should be cleaned or replaced by a  
qualified service technician.  
Pilot burner tube pinched or  
clogged.  
ꢀ The pilot burner should be cleaned, repaired or  
replaced by a qualified service technician.  
Gas Cock Knob not  
correctly positioned.  
ꢀ See the “Lighting The Water Heater” section of this  
manual.  
Pilot burner does not stay Gas Controls (Thermostat’s)  
ꢀ The gas control (thermostat) should be replaced by a  
lit  
single use gas shut-off device  
has opened.  
qualified service technician.  
Combustion Shutoff Device  
Tripped.  
ꢀ The combustion shutoff device should be inspected  
by a qualified service technician.  
CAUTION: For your safety DO NOT attempt repair of gas piping, gas control (thermostat), burners, vent  
connectors or other safety devices. Refer repairs to qualified service personnel.  
28  
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Before You Call For Service…  
Problem  
Possible Causes  
What To Do  
Rumbling noise  
Scale and sediment  
in tank.  
ꢀ Clean tank.  
Relief valve  
producing popping  
noise or draining  
Pressure build up  
caused by thermal  
expansion to a  
ꢀ 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.  
closed system.  
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.  
Low gas pressure.  
ꢀ Check gas supply pressure and manifold pressure.  
The pilot burner may be out.  
ꢀ Check the pilot burner. If necessary, relight using the  
instructions in the “Lighting The Water Heater”  
section of this manual.  
The gas control (thermostat)  
may be set too low.  
ꢀ See the “Water Temperature Setting” of The Water  
Heater section of this manual.  
Leaking or open hot  
water faucets.  
ꢀ Make sure all faucets are closed.  
Check valve error codes.  
“ON/OFF” switch turned off.  
Blower unplugged.  
ꢀ Refer to gas valve error code table on page 30.  
ꢀ Turn “ON”.  
ꢀ Plug in. Verify power supply (120VAC).  
ꢀ Contact a qualified service technician.  
Combustion Shutoff System  
tripped  
Water is too hot  
The gas control (thermostat)  
is set too high.  
● See the “Water Temperature Setting” of The Water  
Heater section of this manual.  
Gas Control (Thermostat)  
Defective.  
● Contact a qualified service technician to replace the  
gas control (thermostat).  
Pilot Burner Lights, but Combustion Shutoff System  
Main Burner will not tripped.  
stay lit.  
● Contact a qualified service technician.  
CAUTION: Make certain power to water heater is “OFF” before removing protective cover FOR ANY REASON.  
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper  
and dangerous operation. VERIFY PROPER OPERATION AFTER SERVICING.  
CAUTION: For your safety DO NOT attempt repair of gas piping, gas control (thermostat), burners, vent  
connectors or other safety devices. Refer repairs to qualified service personnel.  
29  
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Gas Valve LED Error Codes  
1st Flash,  
Pause 1  
second  
2nd Flash,  
Pause 3  
seconds  
Possible Causes  
What To Do  
● No problem.  
Normal operation.  
Standby Mode.  
Slow Flash  
N/A  
Normal operation.  
Heat Mode.  
● No problem.  
Fast Flash  
N/A  
Lockout condition.  
Ignition Failure.  
● Third failed ignition attempt. Unplug to reset  
control. Contact qualified service technician.  
● Make sure manual gas shutoff valve is open.  
● If pressure is too high, the valve will not  
operate.  
1 Flash  
1 Flash  
l● Clean any scale buildup from burner and pilot  
assembly. (Refer to page 26)  
● The spark ignitor assembly could be damaged  
or broken. If so, replace assembly.  
● Bleed air from gas line. (Refer to page 28)  
● Contact local qualified service technician.  
Lockout condition.  
Flammable Vapors Present.  
2 Flashes  
2 Flashes  
3 Flashes  
3 Flashes  
1 Flash  
3 Flashes  
1 Flash  
Lockout condition.  
FVD Interface Failure/Miswiring  
(Flammable Vapor Sensor Failure).  
● Contact local qualified service technician.  
● Contact local qualified service technician.  
Lockout condition.  
Pressure Switch Fails to Open.  
Lockout condition.  
Pressure Switch Fails to Close.  
● Contact local qualified service agent.  
Inspect vent pipe and dilution air inlet for  
blockage. (Refer to “Routine Preventive  
Maintenance” Section.)  
3 Flash  
Lockout condition.  
Line/Neutral Polarity Failure.  
● Check the electrical supply outlet.  
4 Flashes  
4 Flashes  
1 Flash  
2 Flash  
Lockout condition.  
ECO Failure.  
● Contact local qualified service technician.  
Lockout condition.  
False Flame (Unwanted Flame  
Present).  
● Unplug to restart control. Contact local  
qualified service technician.  
4 Flashes  
3 Flash  
Vacation Mode Active  
● Select desired temperature setting.  
5 Flashes  
-
Lockout condition.  
System Error, Cycle Power.  
● Contact local qualified service technician.  
LED Steady ON  
N/A  
CAUTION: Make certain power to water heater is “OFF” before removing protective cover FOR ANY REASON.  
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous  
operation. VERIFY PROPER OPERATION AFTER SERVICING.  
CAUTION: For your safety DO NOT attempt repair of gas piping, remote control, burners, vent connectors or other safety  
devices. Refer repairs to qualified service personnel.  
30  
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Replacement Parts.  
For 40 and 50 gallon models using natural or LP gas.  
Instructions For Placing a Parts Order  
All parts orders should include:  
Part description (as noted below)  
and number of parts desired.  
The model and serial number of the  
water heater from the rating plate.  
CAUTION: For your safety, DO  
NOT attempt repair of gas piping,  
gas control (thermostat), burners,  
vent connectors or other safety  
devices. Refer repairs to qualified  
service personnel.  
Specify type of gas (natural or LP)  
as marked on the rating plate.  
Rubber  
Coupling  
*Burner Assembly Kit  
Blower  
Assembly  
** Heat Trap Nipple  
** Heat  
Flue baffle and hanger  
Trap  
Nipple  
Dip tube  
Dip tube gasket  
Anode rod  
Temperature and  
pressure relief valve  
The kit provides extra speed  
clips and tamper resistant  
screws.  
** May differ in actual appearance.  
Drain valve  
Gas Control (Thermostat)  
*Burner  
*Pilot supply tube  
*Burner supply tube  
*Spark Igniter Wire  
*Sight Glass  
Flammable Vapor Sensor  
Jacket Door  
*Burner Access Door Gasket  
*Burner orifice  
*Spark Igniter Assembly  
*Burner Access Door Grommet  
*Burner Access Door  
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Notes.  
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Notes.  
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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 East  
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.  
34  
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Cut here  
✁
Please place in envelope and mail to:  
Rheem Manufacturing Company  
Warranty Registration Department  
P.O. Box 34070  
Louisville, KY 40232-4070  
35  
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Consumer Product Ownership Registration  
Follow these three steps to protect your  
new appliance investment:  
Complete and mail  
this Consumer  
Product Ownership  
Registration today.  
After mailing the  
Read your Use and  
Care Manual  
carefully. It will help  
you operate your  
new appliance  
properly.  
registration below,  
store this document  
in a safe place. It  
contains information  
you will need should  
you require service.  
1 2 3  
Model Number  
Serial Number  
If you require service, call 800-431-1549.  
Cut here  
✁
Consumer Product Ownership Registration  
Water Heater  
Model Number  
Serial Number  
Mr. ■  
Ms. ■  
Mrs. ■  
Miss ■  
First  
Name  
Last  
Name  
Street  
Address  
Apt. #  
City  
Zip  
Code  
State  
Date Placed  
In Use  
Month  
Day  
Year  
Phone  
Number  
_
_
NOTICE: Failure to complete and return this card does not diminish your limited warranty rights.  
36  
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