Ruud Water Heater AP13370 2 User Guide

Use & Care Manual  
!
Warning: This water heater is not  
With Installation Instructions for the Installer  
suitable for use in manufactured (mobile) homes!  
Gas  
Water Heaters  
75 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.  
!
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
G
N
D
CERTIFIED  
R
T
I
R
®
AP13370-2 (08/06)  
Printed in USA  
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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 VENTING SYSTEM AND PROPERLY VENT  
THE WATER HEATER…  
Failure to install the venting system 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 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.  
!
D A N G E R  
FLAMMABLES  
FlammableVapors  
!
Vapors from flammable  
Water heater has a main  
burner and pilot flame.  
The pilot flame:  
1. which can come on at  
any time and  
2. will ignite flammable  
vapors.  
Vapors:  
1. cannot be seen,  
2. are heavier than air,  
3. go a long way on the  
floor and  
4. can be carried from  
other rooms to the pilot  
flame by air currents.  
liquids will explode and  
catch fire causing death or  
severe burns.  
Do not use or store flammable  
products such as gasoline,  
solvents or adhesives in the  
same room or area near the  
water heater.  
Keep flammable products:  
1. far away from heater,  
2. in approved containers,  
3. tightly closed and  
4. out of children's reach.  
Installation:  
are at least 18" above the  
floor.This will reduce, but not  
eliminate, the risk of vapors  
being ignited by the main  
burner or pilot flame.  
Do not install water heater  
where flammable products will  
be stored or used unless the  
main burner and pilot flames  
Read and follow water heater warnings and instructions. If owners  
manual is missing, contact the retailer or manufacturer.  
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 gas control. Water temperatures above 125°F (52°C)  
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  
!
D A N G E R  
Water Temperature  
Time To Produce a Serious Burn  
120°F (49°C)  
125°F (52°C)  
130°F (54°C)  
135°F (57°C)  
140°F (60°C)  
145°F (63°C)  
150°F (66°C)  
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  
HOT  
155°F (68°C)  
Table courtesy of Shriners Burn Institute  
BURN  
The chart shown above may be used as a guide  
in determining the proper water temperature for your  
home.  
Water temperature over 125°F can  
cause severe burns instantly or  
death from scalds.  
!
DANGER: Households with small children, disabled,  
Children, disabled and elderly are  
at highest risk of being scalded.  
or elderly persons may require a 120°F (49°C) or lower gas  
control (thermostat) setting to prevent contact with “HOT”  
water.  
See instruction manual before  
setting temperature at water  
heater.  
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 21 and 22 for more details.)  
Feel water before bathing or  
showering.  
Temperature limiting valves are  
available, see manual.  
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.  
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(thermostat) was  
set at its lowest setting before the water heater was  
shipped from the factory.  
120°F (49°C)  
125°F (52°C)  
115°F (46°C)  
The illustration at the left  
details the approximate  
water temperature  
for each mark on the Gas  
Control (Thermostat)  
Temperature Dial.  
110°F  
(43°C)  
130°F (54°C)  
105°F  
(41°C)  
135°F (57°C)  
140°F (60°C)  
145°F (63°C)  
150°F (66°C)  
155°F (68°C)  
100°F  
(38°C)  
95°F  
(35°C)  
!
DANGER: Hotter  
water increases the  
68°F (20°C)  
potential for Hot Water  
(Vacation Setting)  
SCALDS.  
160°F (71°C)  
4
Temperatures are approximate  
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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  
!
DANGER: If a gas leak is present or  
different 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 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.  
Leave the house immediately and make  
sure 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, 1102 Q Street,  
Suite 5100, 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. Or in Canada, CAN/CSA B149 -  
Natural Gas and Propane Installation Code. A copy can be purchased from the Canadian Standards  
Association, 5060 Spectrum Way, Mississauga, Ontario, Canada L4W 5N6.  
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 should be installed as  
close as practical to the gas vent or  
chimney.  
Max.  
2”  
(5cm)  
Long hot water lines should be insulated  
to conserve water and energy.  
When such areas cannot be avoided it is  
recommended that a suitable catch pan,  
adequately drained, must be installed  
under the water heater.  
The water heater and water lines should  
be protected from exposure to freezing  
temperatures.  
Diameter of  
water heater  
plus 2”  
Do not install the water heater in  
bathrooms, bedrooms, any occupied  
rooms normally kept closed, or in  
unprotected outdoor areas.  
The pan must not restrict the lower air  
inlet box located around the lower  
perimeter of the water heater.  
(5cm) min.  
The auxiliary catch pan  
installation MUST conform  
to local codes.  
Catch pan kits are available from the store  
where the water heater was purchased, or  
any water heater distributor.  
Minimum clearance from combustible  
construction is 0” (0cm) sides, 0” (0cm)  
rear; and 3” (7.6cm) from the front of  
the control. If the clearances stated on  
the Instruction/Warning Label, located  
on the front of the heater differ, install  
the water heater according to the  
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.  
clearances stated on the label.  
!
WARNING: Combustible  
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” (7.6cm) in all  
directions.  
construction refers to  
adjacent walls and ceilings  
and should not be confused  
with combustible or  
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.  
flammable products and  
materials. Combustible  
and/or flammable products  
and materials should never  
be stored in the vicinity of  
this or any gas appliance.  
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” (61cm) clearance  
from the front and top should be  
available for adequate inspection and  
servicing.  
The water heater must be located so it is  
not subject to physical damage, for example,  
by moving vehicles, area flooding, etc.  
For these reasons installation of a gas fired  
water heater in a garage is not desirable.  
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.  
If local codes require the use of a stand kit  
to raise the water heater 18” (46cm) 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.  
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  
Proper operation of the water heater  
requires air for combustion and  
Buildings of unusually tight construction  
shall have the combustion and ventilation  
air supplied from outdoors, or a freely  
ventilated attic or crawl space.  
CAUTION: For  
COMMERCIAL models  
ONLY - Large exhaust  
fans can lower the air  
pressure inside a building  
or room and interfere  
with proper venting and  
operation. Commercial  
kitchens or other  
ventilation. Provisions for combustion  
and ventilation air must comply with  
referenced codes and standards.  
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  
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 ventilation air must be made.  
locations that must  
(6.5sq. cm) per 1000 Btuh of the total  
input rating of all the appliances in the  
enclosure.  
maintain a high flow of  
exhaust air should have  
the water heater installed  
in a separate room with  
combustion and  
If horizontal ducts are used to  
A confined space is one having a volume  
of less than 50 cubic feet (1.4 cubic  
metres) per 1000 Btuh of the aggregate  
input of all appliances within that space.  
communicate with the outdoors, each  
opening must have a minimum net free  
area of not less than one square inch  
(6.5sq. cm) 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” (7.62cm).  
ventilation air supplied  
directly from outside as  
described to the right.  
The air must be supplied through two  
permanent openings of equal area. One is  
to be located within 12” (30.5cm) above  
the floor and the other is to be located  
within 12” (30.5cm) from the ceiling.  
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 (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” (0.64cm) mesh to  
prevent clogging by lint or other debris.  
The minimum net free area of each opening  
must not be less than one square inch  
(6.5sq. cm) per 1000 Btuh of the total  
input rating of all the appliances in the  
enclosure (but not less than 100 square  
inches (650sq cm)), if each opening  
communicates with other unconfined areas  
inside the building.  
NOTICE: The water heater  
should not be installed near  
an air supply containing  
halogenated hydrocarbons.  
Corrosive Atmospheres  
The air in beauty shops, dry cleaning  
establishments, photo processing labs,  
and storage areas for liquid and powdered  
bleaches or swimming pool chemicals  
often contain such halogenated  
hydrocarbons.  
Propellants from common spray cans or  
gas leaks from A/C and refrigeration  
equipment are highly corrosive after  
passing through a flame.  
The water heater warranty is voided when  
failure of the heater is due to operation in  
a corrosive atmosphere.  
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.  
8
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The water heater must be installed with the factory supplied blower assembly.  
Venting  
DANGER: Failure to  
install the venting system  
The water heater must be vented to the  
pipe from floor joists or other structural  
and properly vent the  
water heater to the  
outdoors as described in these instructions.  
members to help prevent the transmission of  
noise and vibration.  
outdoors as outlined in the  
Venting section of this  
manual will result in unsafe  
operation of the water  
heater causing bodily  
DO NOT connect this water heater to an  
existing vent or chimney – it must be vented Do not support, pin or otherwise secure the  
separately from all other appliances.  
venting system in a way that restricts the  
normal thermal expansion and contraction of  
the chosen venting material.  
Note: This unit can be vented using only the  
following recommended pipe material.  
injury, explosion, fire or  
death. To avoid the risk of  
fire, explosion, or  
PVC (Schedule 40, ASTM D-1785)  
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 performed  
prior to any installation work.  
asphyxiation from carbon  
monoxide, NEVER operate  
the water heater unless it is  
properly vented and has  
adequate air supply for  
proper operation as  
Coex Cellular Core PVC (Schedule 40,  
ASTM F-891)  
CPVC (Schedule 40, ASTM F-441)  
ABS (Schedule 40, ASTM D-2661)  
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.  
outlined in the Venting  
section of this manual.  
ABS (Schedule 40 DWV, Cellular Core,  
ASTM -F628) Not applicable for  
installations in Canada.  
The fittings, other than the TERMINATION,  
should be equivalent to the following:  
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.  
PVC (Schedule 40 DWV, ASTM D-2665)  
CPVC (Schedule 40 DWV, ASTM F-438)  
ABS (Schedule 40 DWV, ASTM D-2661)  
Check the system for signs of sagging or  
other stresses in the joints as a result of  
misalignment of any components in the  
system.  
The use of 2” vent material is not permitted  
in the installation of this water heater. All  
vent material MUST be 3” or 4”.  
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.  
The unit may be vented horizontally through  
a wall or vertically through the roof.  
Pipe runs must be adequately supported  
along both vertical and horizontal runs.  
Maximum unsupported span is  
recommended to be no more than 6 feet  
(1.8 metres).  
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.  
Support method used should isolate the vent  
9
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Installing the Water Heater:  
Blower Assembly Installation  
Connect blower assembly with Molex connector.  
Attach Blower Assembly to top pan using the five  
screws (see diagram to the left).  
Install rubber coupling (supplied in the box with  
water heater) on blower housing and secure it.  
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 (30.5cm) above grade level and  
above normal snow levels.  
4'  
4'  
(1,20m)  
(1,20m)  
Four (4) feet (1.2m)2 below, or four (4) feet (1.2m)  
horizontally from any door, operable 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  
4'  
Corner  
Electric  
Meter  
(1,20m)  
18”  
Fresh  
Air  
(45 cm)  
4' (1,20m)  
Intake  
18” (45 cm)  
Window or Vent  
Three (3) feet (0.9m) above any forced air inlet lo-  
cated within 10 feet (3,05m)³ of any fresh or make-  
up air inlet such as for a dryer or furnace area is  
considered to be a forced air inlet.  
3' above if within 10'  
12" (30.5cm) (Above grade/snow level)  
4'  
(1,20m)  
Eighteen (18) inches (45cm) from an inside corner  
formed by two exterior walls, overhang, or  
obstruction.  
NOTICE: Canadian vent termination/location must  
follow CSA B149 requirements and may vary from above.  
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  
6'  
Do Not terminate vent pipe directly on brick or  
masonry surfaces. It is recommended to use a rust-  
resistant sheet metal backing plate 2 x 2 feet  
(60cm x 60cm) behind vent. (See illustration.)  
close,block off and  
(1,83m)  
install new vent at  
another location  
Inside  
corner  
6' (1,83m)  
caulk  
Caulk  
zone or  
to edge of  
6' (1,83m)  
Do Not locate vent terminal too close to shrubbery, as  
flue gasses may damage them.  
Caulk  
caulk  
zone  
window etc.,starting  
within 6' (1,83m)  
Caulk all cracks, seams and joints within six (6) feet  
(1,80m) of vent terminal.  
RTV silicone caulk  
4'  
(1,20m)  
Recommended  
2 ft.sq. (60 cm sq)  
sheet metal plate  
All painted surfaces should be primed to lessen the  
chance of physical damage. Painted surfaces will  
require maintenance.  
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.  
2
For installations in Canada one (1) foot (0,30 m) is allowed.  
For installations in Canada 6 feet (1.8m)  
10  
3
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Minimum and Maximum Vent Length  
Sea Level (0-2000 ft): 3" Vent*  
Sea Level to High Altitude (0-7700 ft): 4" Vent*  
Number of 90° Elbows Number of Minimum Pipe Maximum Pipe  
Number of 90° Elbows  
with Vent Terminal  
One (1)  
Number of  
Minimum Pipe Maximum Pipe  
with Vent Terminal  
One (1)  
45° Elbows Length req. (ft)  
Length (ft)  
40 (12.19m)  
37.5 (11.43m)  
35 (10.67m)  
32.5 (9.91m)  
30 (9.14m)  
45° Elbows Length req. (ft)  
Length (ft)  
55 (17.76m)  
52.5 (16m)  
50 (15.24m)  
47.5 (14.48m)  
45 (13.72m)  
42.5 (12.95m)  
None  
One (1)  
None  
-
None  
One (1)  
None  
-
One (1)  
Two (2)  
5 (1.5m)  
One (1)  
Two (2)  
Two (2)  
Three (3)  
5 (1.5m)  
-
-
-
-
-
-
-
Two (2)  
Three (3)  
One (1)  
None  
One (1)  
None  
Three (3)  
One (1)  
High Altitude (2000-7700 ft): 3" Vent*  
Number of 90° Elbows Number of Minimum Pipe Maximum Pipe  
* For the 3” and 4” vent, one 90° elbow is  
approximately equal to 5 feet (1,5m) of pipe.  
One 45° elbow is approximately equal to 2.5  
feet (76,2cm) of pipe.  
with Vent Terminal  
One (1)  
45° Elbows Length req. (ft)  
Length (ft)  
35 (10.67m)  
32.5 (9.91m)  
30 (9.14m)  
None  
One (1)  
None  
-
One (1)  
Two (2)  
5 (1.5m)  
-
-
-
-
Two (2)  
Three (3)  
Three (3)  
One (1)  
None  
One (1)  
27.5 (8.38m)  
25 (7.62m)  
22.5 (6.86m)  
Joining Pipes and Fittings  
CAUTION: Before  
proceeding, make sure you  
understand the procedure  
and cautions covered in the  
sections “Joining Pipes  
and Fittings” and  
All pipe, fittings, solvent cement, primers and procedures must conform to American  
National Standard Institute and American Society for Testing and Materials  
(ANSI/ASTM) or CSA standards.  
“Cementing Joints”.  
Cementing Joints  
WARNING: DANGER  
OF FIRE OR BODILY  
INJURY - Solvent cement  
and primers are highly  
flammable. Provide  
All joints in the vent piping must be  
properly sealed and we recommend using  
the following material:  
Hold the pipe fitting for 30 seconds to  
prevent the tapered socket from pushing  
the pipe out of the fitting.  
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 warning on  
material containers.  
PVC materials should use ASTM D-2564  
grade cement.  
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  
CAUTION: FOR PROPER  
INSTALLATION:  
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.  
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 (0°C)  
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.  
11  
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Installing the water heater.  
Vertical Vent Termination  
Insert 1/2" Mesh Protective Screen Inside  
Terminal Elbow  
Minimum twelve (12) inches (30,5 cm)5 above roof.  
Minimum twelve (12) inches (30,5 cm)6 above  
anticipated snow level.  
Short Piece of Vent Pipe  
Maximum twenty-four (24) inches (61cm)above  
roof level without additional support for vent.  
Four (4) feet (1.2m) from any gable, dormer or other  
roof structure with building interior access (i.e., vent,  
window, etc.).  
Ten (10) feet (3,05m)7 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.  
Min. 12" (30,5cm)5  
Vent Pipe  
Above Roof  
Through Roof  
Min. 12" (30,5cm) Above  
Anticipated Snow Level4  
Elbows  
Max. 24" (61cm) Above  
Roof (Without Additional  
Support)  
5
For installations in Canada 18” (45,7 cm).  
6
Not applicable for installations in Canada.  
7
For installations in Canada 6´ (1,8 m).  
4
Not applicable for Canada Installations.  
NOTICE: Canadian vent termination/location must follow CSA B149 requirements and may vary from above.  
Horizontal Vent Installation  
Once the vent terminal location has been determined,  
Recommended 2' x 2'  
make a hole through the exterior wall to  
Sheet Metal Shield  
Mortar or  
accommodate the 3” or 4” vent pipe. Vent pipe must  
exit exterior wall only.  
on Brick or Masonry Walls  
Silicone Caulk  
Vent Terminal with  
1
Insert a small length of 3” or 4” vent pipe through the  
wall and connect the coupling as shown.  
Vent Pipe  
/
2" Mesh Protective  
Screen Inside  
From  
Water Heater  
Place the ½” mesh metal screen inside the terminal  
fitting and connect it as shown to the vent pipe on the  
exterior of the building.  
Seal any opening around the vent pipe or fittings with  
mortar or silicone caulk as shown.  
12” min  
(30,5 cm)  
above  
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.  
grade  
Use silicone sealant at the point the vent connector  
joins the blower assembly.  
Draining the Condensate  
In certain conditions, installations in  
unconditioned space or having long  
Condensate is known to be acidic; refer to  
local, state (provincial) or federal codes  
horizontal or vertical runs may accumulate for proper handling methods.  
condensate.  
In order to prevent condensate from  
draining back into the blower, we  
recommend a condensate tee and drain to  
be installed in a horizontal vent section as  
close as practical to the blower vent  
connection.  
12  
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Thermal Expansion  
Determine if a check valve exists in the inlet water line. Check with your local  
water utility company. 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. 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.  
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 illustration on page 17 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.  
permanently damage the  
dip tube and/or heat traps.  
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 (1034 kPa), 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.  
13  
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Installing the water heater.  
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.  
A steady flow of water from the hot water  
faucet(s) indicates a full water heater.  
Open each hot water faucet slowly to  
allow the air to vent from the water  
heater and piping.  
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.  
If, however, the condensation continues,  
examine the piping and fittings for  
possible leaks.  
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.  
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.  
NOTICE- Local codes or  
plumbing authority  
A ground joint union or ANSI design  
certified semi-rigid or flexible gas  
Do not use excessive force (over 31.5 ft  
lbs.) (42.708 N.m) 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.  
requirements may vary  
from the instuctions or  
diagrams provided and  
take precedence over these  
instructions.  
appliance connector should be installed in  
the gas line close to the water heater. The  
National Fuel Gas Code (NFGC) and/or  
CAN/CSA B149 mandates a manual gas  
shut-off valve: See (NFGC or CAN/CSA  
B149) for complete instructions.  
The inlet gas pressure to the water heater  
must not exceed 10.5” w.c. (2.625 kPa) for  
natural gas, or 14” w.c. (3.5 kPa) 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 max.  
length shall not exceed 36” (91.4cm).  
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  
must be leak tested at normal operating  
pressures before it is placed in operation.  
The factory connections to the gas 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.  
14  
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Pressure Testing the Gas Supply System  
The water heater and its manual gas shut- The water heater must be isolated from  
off valve must be disconnected from the  
gas supply piping system during any  
pressure testing of that system at  
the gas piping system by closing the  
manual gas shut-off valve during any  
pressure testing of the gas supply piping  
pressures in excess of 3/8 psi (10.5” w.c.) at pressures equal to or less than  
(2.6 kPa) for natural gas, or 1/2 psi (14”  
w.c.) (3.5 kPa) for LP gas.  
3/8 psi (10.5” w.c.)(2.625 kPa) for  
natural gas, or 1/2 psi (14” w.c.)  
(3.5 kPa) for LP gas.  
High Altitude  
This water heater is certified for  
installations at elevations up to 7,700 feet  
(2347m).  
WARNING: Failure to  
install a water heater  
Installations above 7,700 feet (2347m) are  
not permitted.  
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.  
Wiring  
CAUTION: Label all  
wires prior to disconnection  
when servicing controls.  
Wiring errors can cause  
improper and dangerous  
operations.  
If local codes permit, the water heater may  
be connected to electric service with the  
power cord provided (DO NOT use an  
extension cord).  
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; or in Canada, the  
latest edition of the Canadian Electric Code  
CSA C22.1.  
A grounding receptacle is required.  
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.  
VERIFY PROPER  
OPERATION AFTER  
SERVICING!  
NOTICE: 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.  
15  
Connection Diagram  
Schematic Diagram  
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Installing the water heater.  
Insulation Blankets  
Insulation blankets, available to the  
general public, for external use on gas  
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 and  
CSA standards with respect to insulation  
and standby loss requirements making an  
insulation blanket unnecessary.  
attention to the following so as not to  
restrict the proper function and  
operation of the water heater:  
WARNING: If local  
codes require external  
application of insulation  
blanket kits the  
Do not cover the operating or warning  
labels attached to the water heater or  
attempt to relocate them on the exterior  
of insulation blanket.  
manufacturer’s instructions  
included with the kit must  
be carefully followed.  
Do not apply insulation to the top of the  
water heater. This will interfere with the  
safe operation of the draft hood.  
Do not cover the burner access door,  
jacket door, gas control (thermostat)/gas  
valve or pressure and temperature relief  
valve.  
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 apply insulation to the bottom of  
the water heater or the area where the  
combustion air inlet openings are  
located. This area must be unobstructed  
so as not to restrict combustion air flow  
to the burner.  
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 is  
restricting the air flow to the combustion  
air inlet openings (perforation holes)  
located around the lower perimeter of  
the water heater jacket. This could result  
in an unsafe operating condition.  
CAUTION: If local codes require the  
application of an external insulation  
blanket to this water heater, pay careful  
Hot and Cold Pipe Insulation Installation  
HO
COL
HO
CO
Typical horizontal piping arrangement  
Typical vertical piping arrangement  
For increased energy efficiency, some  
water heaters have been supplied with  
two 24” (61cm) 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 heat traps in the hot  
outlet line and cold water inlet line.  
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 permanently damage the dip tube  
and/or heat traps.  
16  
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Typical Installation  
Flue Pipe (ABS or PVS)  
to Outside Vent Terminal  
Union  
Blower Assembly  
Pitch up 1/4"  
per foot  
Heat Trap  
6" (15cm)  
Min.  
Rubber Coupling  
Hot Water  
Outlet to  
Fixtures  
Anode  
(located undernea th  
Blower Assembly)  
Union  
Temperature & Pressure  
Relief Valve  
Heat Trap  
Manual Gas  
Shut-off  
6" (15cm) Min.  
To Cold  
Water Supply  
To Gas  
Supply  
Shut-off Valve  
Ground Join t Union  
Thermal Expansion  
Tank  
Sediment Trap  
Cap  
(If Required)  
Drain Valve  
Relief valve discharge  
line to suitable open  
drain  
Thermostatic  
Gas Valve  
NOTICE: The National  
Fuel Gas Code (NFGC) or  
CAN/CSA B149,  
Jacket Door  
AirGap  
6" (15cm)  
Installation Code,  
Auxiliary Catch Pan  
Drain Pan Pipe  
mandates a manual gas  
shut-off valve: See (NFGC)  
or (CAN/CSA B149) for  
complete instructions.  
Local codes or plumbing  
authority requirements  
may vary from the  
instructions or diagrams  
provided and take  
precedent over these  
instructions.  
to suitable drain  
Vacuum Relief Valve  
(Not Supplied)  
If required, install per local codes  
and valve manufacturer’s  
instructions.  
17  
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Installation Checklist  
A. Water Heater Location  
Close to area of vent termination.  
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” (2.54cm) from combustion  
air inlet openings observed.  
Air supply free of corrosive elements and  
flammable vapors.  
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  
Discharge line protected from freezing.  
properly installed and discharge line run to  
open drain.  
E. Venting  
Vent length verified.  
Vent termination/screen installed.  
Heater vented separately from all other  
appliances.  
Vent pipe supported at required intervals.  
Appropriate minimum clearance observed.  
Proper materials and techniques used in vent  
assembly.  
Precautions taken to prevent moisture  
damage around vent termination.  
Vent pipe properly secured to blower  
housing.  
F. Wiring  
Correct power supply (120V) 50/60 Hz.  
Electrical Connections tight.  
Heater properly ground and proper polarity  
observed.  
18  
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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.  
Combination Potable and Space Heating Application  
Hot water  
supply to  
house  
Tee fitting must be installed as shown.  
DANGER: If this water heater is  
This ensures that any air in the water lines  
will be purged through the domestic water  
faucets and showers.  
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  
outlet on  
DANGER: When this system  
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  
supply to  
house  
outlet on  
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.  
water heater  
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  
Spring loaded check valve in heating  
unit hot water supply line and cold  
water return line (not supplied with  
water heater)  
NOTE: 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.  
Domestic hot water supply  
Incoming cold  
water supply  
Thermal Expansion  
Tank (if required-not  
supplied with water  
heater)  
Heat Trap  
6” (15cm)  
Min.  
Mixing or  
tempering  
valve (refer  
to warning  
above)  
HOT  
Shut-Off  
Isolation valve in hot water supply line  
to heating unit  
COLD  
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  
Temperature and Pressure  
Relief Valve  
Gas line to water heater  
Cold water  
Water Heater Jacket  
return line from  
heating unit  
Temperature and pressure  
relief valve discharge line  
Hot water  
supply line  
into heating unit  
Heating unit  
Drain valve  
(not supplied with water  
heater)  
19  
6” (15cm)Air Gap to Drain  
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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.  
20  
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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.  
Adjustments  
The gas valve employed on the heater is  
To adjust the burner, loosen the air shutter  
screw and close the shutter to soften the  
flame or open the shutter to sharpen the  
flame.  
equipped for total regulation of the main  
burner and does not require adjustment.  
The liquefied petroleum (LP) gas water  
heater is equipped with a cast iron burner  
that requires a primary air adjustment at  
the time of installation.  
The proper flame should be soft blue, not  
yellow or with a hard blue center.  
Final air adjustment should be made after  
5 minutes of continuous burning.  
An air shutter is located at the air opening  
end of the burner.  
Water Temperature Setting  
The temperature of the water in the water  
heater can be regulated by setting the  
temperature dial on the front of the gas  
control (thermostat).  
Water temperatures above 125°F (52°C)  
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.  
!
DANGER: Hotter water  
increases the Potential  
for Hot Water SCALDS.  
Households with small  
children, disabled, or elderly  
persons may require a 120°F  
(49°C) 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 hot and cold water in branch water lines.  
in energy and operating costs.  
Mixing valves are available for reducing  
point of use water temperature by mixing  
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 recommended  
The chart below may be used as a guide in  
determining the proper water temperature  
starting point temperature is 120°F (49°C). for your home.  
21  
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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.  
Therefore, always remember to test the  
water temperature with your hand before  
use and remember that hotter water  
increases the risk of scald injury.  
Also, always supervise young children or  
others who are incapacitated.  
The wide arrow mark near CAUTION  
on the rim of the temperature dial,  
represents an approximate water  
temperature of 120°F (49°C).  
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 reference mark, to the left, represents  
an approximate water temperature of  
125°F (52°C).  
Each reference mark above or below these  
points indicates an approximate change of  
5°F (3°C).  
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.  
To adjust the temperature, turn the  
temperature dial to an initial setting of  
120°F (49°C).  
A condition known as “stacking” or  
“layering” can occur when a series of  
short and frequent hot water draws are  
taken.  
!
WARNING: Should overheating occur or  
the gas supply fail to shut off, turn off the  
manual gas control valve to the appliance.  
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).  
Time/Temperature Relationship in Scalds  
120°F (49°C)  
125°F (52°C)  
115°F (46°C)  
Water Temperature  
Time To Produce a Serious Burn  
110°F  
(43°C)  
20°F (49°C)  
125°F (52°C)  
More than 5 minutes  
11/2 to 2 minutes  
130°F (54°C)  
130°F (54°C)  
135°F (57°C)  
140°F (60°C)  
145°F (63°C)  
150°F (66°C)  
155°F (68°C)  
About 30 seconds  
About 10 seconds  
Less than 5 seconds  
Less than 3 seconds  
About 11/2 seconds  
About 1 second  
105°F  
135°F (57°C)  
(41°C)  
140°F (60°C)  
145°F (63°C)  
150°F (66°C)  
155°F (68°C)  
100°F  
(38°C)  
95°F  
(35°C)  
Table courtesy of Shriners Burn Institute  
68°F (20°C)  
(Vacation Setting)  
160°F (71°C)  
Temperatures are approximate  
22  
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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 gas to the water  
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 released  
into a suitable drain to  
prevent injury or property  
damage.  
Properly maintained, your water heater  
will provide years of dependable trouble-  
free service.  
(thermostat) sensors, causing the sensors to  
operate erratically. Because accumulated  
solids can prevent the gas control  
(thermostat) sensors from accurately  
reading the water 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.  
It is recommended that a periodic  
inspection of the gas control (thermostat),  
burner, relief valve, internal flue-way and  
venting system should be made by service  
personnel qualified in gas appliance repair.  
It is suggested that a routine preventative  
maintenance program be established and  
followed by the user.  
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.  
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.  
!
DANGER: Hotter water  
increases the potential for  
Hot Water Scalds.  
The anode rod should be removed from the  
water heater’s tank annually for inspection  
and replaced when more than 6” (15.24cm)  
of core wire is exposed at either end of the  
rod.  
NOTICE: If the temperature and  
pressure relief valve on the hot 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.  
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  
Make sure the cold water supply is turned  
off before removing anode rod.  
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.  
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 accumulate, these  
solids can cover the gas control  
hot water temperatures and  
other potentially hazardous  
conditions.  
Housekeeping  
!
DANGER: Combustible  
materials, such as clothing,  
cleaning materials, or  
DO NOT block or obstruct any of the  
combustion air inlet openings located  
around the perimeter of the water heater.  
A minimum of 1” (2.54cm) is required  
between these combustion air inlet openings  
and any obstruction.  
Vacuum around the base of the water  
heater for dust, dirt and lint on a regular  
basis. Visually inspect pilot burner and  
relight if necessary.  
flammable liquids, etc., must  
not be placed against or next  
to the water heater.  
To ensure sufficient ventilation and  
combustion air supply, proper clearances  
must be maintained.  
23  
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Care and cleaning of the water heater.  
Venting System Inspection  
It is recommended that the water heater’s  
internal flue be inspected annually to be  
certain it is clean by removing the Blower  
Assembly.  
Make certain the vent pipes are properly  
sealed and securely attached.  
If after inspection of the vent system  
you found soot or deterioration;  
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.  
Reinstall the Blower Assembly as per  
instructions on page 10. Make sure that  
the Blower Assembly is tightly screwed to Test for spillage at the Blower Assembly  
the top pan of the water heater.  
after 5 minutes of burner operation. Use a  
flame of a match or candle or smoke.  
Inspect the gas vent pipes and the  
termination elbow.  
Sheet Metal Burner  
Cast Iron Burner  
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.  
With the jacket and inner doors removed,  
inspect the pilot burner flame and the  
main burner while firing.  
For cleaning, after shutting off the gas and  
electrical supplies to the water heater,  
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.  
If any unusual burner operation is noted,  
the water heater should be shut off until  
qualified service assistance can be  
obtained.  
Proper burner and pilot burner  
pattern.  
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  
After a long shut-down period, the water  
heater’s operation and controls should be  
water to the appliance should be turned off checked by qualified service personnel.  
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.  
24  
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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.  
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.  
Refer to the Adjustment Section in “Operating the Water  
Heater”.  
Air Shutter Adjustment  
(LP models only)  
Pilot burner not  
lighting  
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.  
Temperature dial not  
correctly positioned.  
See the “Lighting The Water Heater” section of this  
manual.  
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.  
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).  
CAUTION: For your safety DO NOT attempt repair of electrical wiring, gas piping, gas control (thermostat), burners, vent  
connectors or other safety devices. Refer repairs to qualified service personnel.  
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 error can cause improper and dangerous  
operation. VERIFY PROPER OPERATION AFTER SERVICING.  
25  
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Before You Call For Service…  
Problem  
Possible Causes  
What To Do  
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 will not light. Check the pilot burner. If necessary, refer to 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.  
Gas Valve Error Code Table  
LED Status  
Possible Causes  
What To Do  
Slow Flash  
Normal Operation  
No problem.  
Fast Flash  
Normal Operation  
Call for heat.  
Wait until gas control generates a self-reset.  
Solid Red LED  
2 Flashes  
Lockout condition.  
Replace gas control.  
Internal failure detected.  
Lockout condition.  
Ignition failure.  
Third failed ignition attempt. Unplug to reset control.  
Contact local qualified service agent. Make sure manual  
gas shut-off valve is open. If pressure is too high the  
valve will not operate. Refer to “Installing the water  
heater”  
Clean any scale buildup from burner and pilot assembly  
The spark ignitor assembly could be damaged or broken.  
If so, replace assembly.  
Bleed air from gas line.  
3 Flashes  
4 Flashes  
Lockout condition.  
Switch fails to open.  
Contact local qualified service agent.  
Chec for blockage in the vent system.  
Replace pressure switch.  
Lockout condition.  
Switch fails to close.  
Contact local qualified service agent. Inspect vent pipe  
and dilution air inlet for blockage. (Refer to “Routine  
Preventative Maintenance”)  
Make certain proper ventilation air us supplied. (Refer to  
“Combustion and Ventilation Air”)  
5 Flashes  
6 Flashes  
Lockout condition.  
Verify electrical supply outlet polarity.  
Neutral polarity failure.  
Lockout condition.  
ECO failure  
Replace valve.  
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.  
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 error can cause improper and dangerous  
operation. VERIFY PROPER OPERATION AFTER SERVICING.  
26  
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Replacement Parts.  
For 75 gallon models using natural or LP gas.  
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 gas piping,  
gas control (thermostat), burners,  
vent connectors or other safety devices.  
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 type of gas (natural or LP)  
as marked on the rating plate.  
Rubber Coupling  
w/ Clamp  
Rubber Coupling  
Blower  
Assembly  
On/Off  
Switch  
Heat Trap  
(Cold)  
Pressure  
Switch  
Dip Tube  
Gasket  
Heat Trap  
(Hot)  
Blower Assembly  
Dip Tube  
Gasket  
Anode Rod  
(located under  
blower)  
Temperature & Pressure  
Relief Valve  
Baffle Hanger  
Baffle  
Pilot Supply  
Tube  
Spark Ignition  
Assembly  
Drain Valve  
Burner  
Supply  
Tube  
Burner  
LP Burner Assembly  
Drain Valve  
Shroud  
Wiring Cover  
Gas Control  
(Thermostat)  
Burner  
Supply  
Tube  
Drop Tube  
(optional)  
Burner  
Inner Door  
Jacket Door  
Spark Ignition  
Assembly  
Pilot Supply  
Tube  
Natural Gas  
Burner Assembly  
27  
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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:  
In the United States:  
2600 Gunter Park Drive  
Montgomery, Alabama 36109-1413  
Phone: 1-800-432-8373.  
In Canada:  
Rheem Canada Ltd./Ltée.  
128 Barton Street West  
P.O. Box 2846, Station A  
Hamilton, Ontario Canada L8N 3P3  
Phone: Customer Service 1-800-432-8373  
Warranty 1-800-263-8342  
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.  
28  
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