Rheem Water Heater AP13731 User Guide
Use & Care Manual  
With Installation Instructions for the Installer  
Commercial Indoor and Outdoor Gas  
Tankless Water Heater  
!
Warning: This water heater is not suitable  
for use in manufactured (mobile) homes!  
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, to 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 don’t 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!  
!
Indoor Water Heater  
California Proposition 65 Warning: This product contains  
!
Outdoor Water Heater  
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
N
31-52756  
D
CERTIFIED  
Printed in Japan  
I
AP13731 (03/05)  
T
®
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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 AND PROPERLY VENT THE WATER HEATER…  
Failure to install 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 outlet on the OUTDOOR water heater, or the vent terminal  
and the vent system on the INDOOR water heater 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 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  
Flammable Vapors  
Vapors from flammable  
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.  
Water heater has a main  
burner flame.  
The main burner 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  
main burner flame by  
air currents.  
Keep flammable products:  
1. far away from heater,  
2. in approved containers,  
3. tightly closed and  
4. out of children's reach.  
Installation:  
Do not install water heater  
18" above the floor. This will  
where flammable products will reduce, but not eliminate, the  
be stored or used unless the  
main burner flame is at least  
risk of vapors being ignited  
by the main burner flame.  
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 remote 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.  
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)  
More than 5 minutes  
11/2 to 2 minutes  
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  
HOT  
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.  
BURN  
!
DANGER: Households with small children,  
Water temperature over 125°F can  
cause severe burns instantly or  
death from scalds.  
disabled, or elderly persons may require a  
120°F (49°C) or lower temperature setting to  
prevent contact with “HOT” water.  
Children, disabled and elderly are  
at highest risk of being scalded.  
Maximum water temperature occurs while burner is  
on. 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 instruction manual before  
setting temperature at water  
heater.  
Feel water before bathing or  
showering.  
(See page 27 & 28 for more details.)  
Temperature limiting valves are  
available, see manual.  
The temperature of the water at the outlet of the  
water heater can be regulated by setting the  
temperature on Remote Control. The remote control  
was set at 100°F (38°C) before it was shipped from  
the factory.  
Notice:  
The illustration to the bottom left illustrates the  
Remote Control and how to adjust the water  
temperature.  
Display  
shows  
°F only.  
PRIORITY  
Notice: The factory setting allows operating  
°F  
temperatures between 100°F (38°C) and 120°F  
(49°C). Temperatures of up to 180°F (82°C) can be  
achieved with the MAIN (UMC-117) remote control  
and a dip switch adjustment. Only qualified service  
personnel should perform this adjustment. Only  
factory authorized remote control(s) should be used.  
POWER  
ON/OFF  
Notice: When this water heater is supplying general  
purpose hot water requirements for use by  
individuals, a thermostatically controlled mixing  
valve for reducing point of use water temperature is  
recommended to reduce the risk of scald injury.  
Contact a licensed plumber or the local plumbing  
authority for further information.  
Higher (Hotter)  
Lower (Cooler)  
100 102 104 106 108 110 112 114 116 118 120* 125 130 135 140 150 160 170 180 °F  
38 39 40 41 42 43 44 46 47 48 49* 52 54 57 60 66 71 77 82 °C  
* Temperatures above 120°F (49°C) can be achieved  
by adjusting the dip switch. See page 35 for dip  
switch adjustment.  
4
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DANGER!  
NATURAL GAS AND LIQUEFIED PETROLEUM MODELS  
Both 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.  
Notice: If a gas leak is present or suspected:  
● Do not attempt to find the cause yourself.  
● Do not try to light any appliance.  
● Water heaters utilizing LP gas are  
different from natural gas models. A  
natural gas water heater will not function  
safely on LP gas and vice versa.  
● 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  
● Leave the building immediately and  
make sure your family and pets leave  
also.  
equipment damage, personal injury or  
fire, do not connect the water heater to a  
fuel type not in accordance with the unit  
data plate; propane for propane units  
and natural gas for natural gas units.  
These units are not certified for any  
other fuel type.  
● Leave the doors open for ventilation and  
contact the gas supplier, a qualified  
service agency or the fire department.  
● Stay away from the building until the  
service call has been made, the leak is  
corrected and a qualified agency has  
determined the area to be safe.  
● 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.  
● Propane or 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  
and 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 or tankless-style, consult the local building  
jurisdiction code 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  
● Do not attempt to repair or replace any  
part of your water heater unless it is  
specifically recommended in this  
installing or operating the water heater.  
● Use this appliance only for its intended  
purpose as described in this Use and  
Care Manual.  
manual. All other servicing should be  
referred to a qualified technician.  
● 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 (INDOOR) 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 North Capitol Street Northwest, Washington, DC 20001 as ANSI standard Z223.1 or National Fire  
Protection Association, 1 Batterymarch Park, Quincy, MA 02269 as NFPA 54. In Canada, the latest  
edition of the CSA B149.1 Natural Gas and Propane Installation, and the Canadian Electrical Code,  
CSA C22.1 Part 1, in the absence of local codes.  
Location of INDOOR Water Heater  
The water heater should not be located  
in an area where leakage of the heat  
exchanger or connections will result in  
damage to the area adjacent to it or to  
lower floors of the structure.  
● The water heater should be installed as  
close as practical to the vent termination  
to minimize vent length and the number  
of elbows required for venting.  
● The water heater should be installed with  
the proper venting materials and  
termination suitable for Category III  
venting.  
When such areas cannot be avoided it is  
recommended that a suitable catch pan,  
adequately drained, must be installed  
under the water heater.  
● Failure to install and properly vent the  
water heater to the outdoors as outlined  
in the Venting Section of this manual can  
result in unsafe operation.  
The pan must not restrict combustion air  
flow.  
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.  
!
WARNING: Combustible  
● Long hot water lines should be insulated to  
conserve water and energy.  
construction refers to  
adjacent walls and ceilings  
and should not be confused  
with combustible or  
● The water heater and water lines should  
be protected from exposure to freezing  
temperatures.  
flammable products and  
materials. Combustible  
and/or flammable products  
and materials should never  
be stored in the vicinity of  
this or any gas appliance.  
● Do not install the water heater in  
bathrooms, bedrooms, any occupied  
rooms normally kept closed, or in  
outdoor areas.  
Because of natural air movement in a room  
or other enclosed space, flammable vapors  
can be carried some distance from where  
their liquids are being used or stored. The  
open flame of the water heater’s main  
burner can ignite these vapors causing an  
explosion or fire which may result in severe  
burns, death or property damage.  
● Do not install the water heater in small,  
poorly ventilated rooms, or in air tight  
rooms with air-conditioning.  
Minimum Clearance from  
Combustible and  
Non-Combustible  
Construction.  
● Do not install water heater where subject  
to vibrations.  
The water heater must be located so it is not  
subject to physical damage, for example, by  
moving vehicles, area flooding, etc.  
min.  
1/2 "  
(1.3 cm)  
min.  
min. 2"  
(5 cm)  
(m5inc.m2")  
● Do not install the water heater in  
Recreational Vehicles, Mobile Homes,  
Boats and other Watercrafts.  
1/2 "  
(1.3 cm)  
(30 cm)  
min. 12"  
(24" (60 cm) minimum is  
recommended for service)  
If the water heater is installed in a garage, it  
should be installed so that the direct  
ignition system and main burner are no less  
than 18 inches (45 cm) above the garage  
floor.  
Top = 12"(30 cm) Back = 0" *  
(1.3 cm)  
● Do not install the water heater near vents  
for heating or cooling. A minimum of 4  
feet (1.2 m) should be maintained.  
(5 cm)  
Vent = 2"  
Front = 12"(30 cm) Bottom = 12"  
(with support bracket)  
Side = 1/2"  
(30 cm)  
*
!
WARNING: Follow vent  
● Minimum clearance from combustible  
and non-combustible construction is 1/2”  
(1.3 cm) sides, 0” rear (with support  
bracket); 12” (30 cm) from the bottom;  
12” (30 cm) from the front of the water  
heater; and 12” (30 cm) from the top  
(24” (61 cm) from front and top is  
recommended for servicing purposes).  
Maintain a minimum clearance of  
2” (5 cm) around the vent pipe to  
Raising the gas fired water heater will  
reduce BUT NOT eliminate the possibility  
of lighting the vapor of any flammable  
liquids which may be improperly stored or  
accidentally spilled.  
manufacturers  
instructionwhile installing  
vent. If required, provide  
additional clearances from  
vent to combustibles per  
vent manufacturers  
instruction.  
combustible or non-combustible  
Vent Pipe  
3" (8 cm) min  
2" (5 cm) min  
construction. If the clearances stated on  
the Instruction/Warning Label, located  
on the front panel of the heater differ,  
install the water heater according to the  
clearances stated on the label.  
2" (5 cm) min  
7
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Installing the (OUTDOOR) 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  
North Capitol Street Northwest, Washington, DC 20001 as ANSI standard Z223.1 or National Fire Protection  
Association, 1 Batterymarch Park, Quincy, MA 02269 as NFPA 54. In Canada, the latest edition of the CSA  
B149.1 Natural Gas and Propane Installation, and the Canadian Electrical Code, CSA C22.1 Part 1, in the  
absence of local codes.  
Location of the OUTDOOR water heater  
This water heater is for OUTDOOR  
installation ONLY!  
● The water heater should be installed  
vertically with the water, gas, and power  
connections on the underside pointing  
toward the ground.  
This water heater is an outdoor model  
and must be mounted vertically. It  
must not be installed indoors or in a  
confined space.  
● Failure to properly install the water  
heater outdoors as outlined in this  
manual can result in unsafe operation.  
The water heater should be installed  
close to the most frequently used outlet  
and its position chosen with safety and  
service in mind.  
● Hot and cold water lines should be  
insulated to conserve water and energy.  
● The water heater and water lines should  
be protected from exposure to freezing  
temperatures.  
Make sure people (particular children,  
disabled, and elderly) will not touch the  
hot water outlet or the flue terminal.  
The flue terminal and air inlet must be  
clear of obstruction and shrubbery.  
● Do not install water heater where  
subject to vibrations.  
● Do not install the water heater in  
Recreational Vehicles, Mobile Homes,  
Boats and other Watercrafts.  
The water heater should not be located  
in an area where leakage of the heat  
exchanger or connections will result in  
damage to the area adjacent to it or to  
lower floors of the structure.  
● Do not install the water heater near  
vents for heating or cooling. A  
minimum of 4 feet should be  
maintained.  
!
WARNING: Combustible  
construction refers to  
adjacent walls and ceilings  
and should not be confused  
with combustible or  
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  
and noncombustible construction is  
1/2” (1.3 cm) sides, 0” rear (with  
support bracket); 12” (30 cm) from the  
bottom; 12” (30 cm) from the front of  
the water heater; and 12” (30 cm) from  
the top (24” (61 cm) from front and top  
is recommended for servicing  
purposes). If the clearances stated on  
the Instruction/Warning Label, located  
on the front panel of the heater differ,  
install the water heater according to the  
clearances stated on the label.  
flammable products and  
materials. Combustible  
and/or flammable products  
and materials should never  
be stored in the vicinity of  
this or any gas appliance.  
Because of natural air movement in a  
room or other enclosed space, flammable  
vapors can be carried some distance from  
where their liquids are being used or  
stored. The open flame of the water  
heater’s main burner can ignite these  
vapors causing an explosion or fire which  
may result in severe burns, death or  
property damage.  
Minimum Clearance from  
Combustible and  
Non-Combustible  
Construction.  
min.  
1/2 "  
(1.3 cm)  
min.  
1/2 "  
(1.3 cm)  
The water heater must be located so it is  
not subject to physical damage, for example,  
by moving vehicles, area flooding, etc.  
min. 12" (30 cm)  
(24" (61 cm) minimum is  
recommended for service)  
Top = 12" (30 cm)  
Front = 12" (30 cm)  
Back = 0" (with support bracket)  
Side = 1/2" (1.3 cm)  
Bottom = 12" (30 cm)  
8
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Installing the water heater:  
Proper operation of the water heater requires air for combustion and ventilation. Provisions for  
combustion and ventilation air must comply with referenced codes and standards.  
Combustion and Ventilation Air (Indoor Water Heater Only)  
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.  
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  
(6.5 sq cm) per 4000 Btuh of the total  
input rating of all the appliances in the  
enclosure.  
Air Openings  
Min. 200 Sq. In.  
(1290 cm2  
)
A confined space is one having a volume  
of less than 50 cubic feet (1.4 cubic  
meters) per 1000 Btuh of the aggregate  
input of all appliances within that space.  
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  
(6.5 sq 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” (7.6 cm).  
Min. 3" (7.6 cm)  
The air must be supplied through two  
permanent openings of equal area. One  
is to be located within 12” (30 cm) above  
the floor and the other is to be located  
within 12” (30 cm) below the ceiling.  
DANGER: OUTDOOR  
water heaters must not  
be installed indoors or  
in a confined space.  
The minimum net free area of each opening  
must not be less than one square inch (6.5  
sq cm) per 1000 Btuh of the total input  
rating of all the appliances in the  
enclosure (but not less than 100 square  
inches (650 cm2),) if each opening  
communicates with other unconfined areas  
inside the building.  
Install outdoor water  
heaters outdoors only.  
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” (0.64 cm) mesh to  
prevent clogging by lint or other debris.  
Buildings of unusually tight construction  
shall have the combustion and ventilation  
air supplied from outdoors, or a freely  
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.  
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. Verify all included parts are present (see below).  
Use  
&
Care Manual  
W
ith Installation Instructions for the Installer  
Certificate of  
Limited  
Residential  
Tankless WateGrasHeaters  
Warranty  
Warning: This water heater is not suitable for  
use in manufactured (mobile) homes!  
®
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, to the owner–operator to  
,
explain the features, operation, safety precautions, maintenance and  
troubleshooting of the water heater This manual also includes parts  
list.  
PRIORITY  
.
a
COMMERCIAL  
W
A
T
E
R
H
E
A
T
E
R
S
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 don’t 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 How to Obtain Service Assistance.  
°F  
Do not destroy this manual. Please read carefully and keep in  
place for future reference.  
a
safe  
Wood Screw x 5pcs.  
Washer x 4 pcs.  
COMMERCIAL  
GAS TER HEATERS  
YEAR HEA EXCHANGER AND  
YEAR ARTS LIMITED ARRANTY  
T
ANKLESS  
!
!
Recognize this symbol as an indication of Important Safety  
nformation!  
WA  
WITH  
1
A
3
T
California Proposition 65 Warning: This product contains  
P
W
chemicals known to the State of California to cause cancer birth  
,
defects or other reproductive harm.  
W
ARNING: If the information in these instructions is not followed exactly,  
AP13487-1 (03/05)  
!
a
fire or explosion may result causing property damage, personal injury or death.  
POWER  
ON/OFF  
!
FOR YOUR SAFETY!  
—
Do not store or use gasoline or other  
flammable vapors or liquids or other  
combustible materials in the vicinity of this or  
●
●
—
If you cannot reach your gas supplier call  
,
the fire department.  
Do not return to your home until authorized  
by the gas supplier or fire department.  
any other appliance.  
explosion or fire.  
T
o
do so may result in an  
Improper installation, adjustment,  
—
WHA  
T
TO DO IF YOU SMELL GAS  
alteration, service or maintenance can cause  
property damage, personal injury, or death  
Refer to this manual. Installation and service  
.
●
Do not try to light any appliance.  
●
Do not touch any electrical switch; do not  
use any phone in your building.  
Warranty  
must be performed by  
a
qualified installer  
,
service agency or the gas supplier  
.
●
Immediately call your gas supplier from  
neighbor’ phone. Follow the gas  
supplier’ instructions.  
a
s
s
D
E
S
I
Printed in USA  
Tankless Unit  
E
TIFI  
E
D
®
Remote Control  
Assembly Kit  
Manual Appliance  
Gas Shut-off Valve  
Use & Care Manual  
9
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Mounting the Water Heater  
Make sure the location of the appliance  
allows for easy access and operation.  
Using a wood screw and a washer, affix  
the lower bracket to the wall (Left and  
Right). Repeat to affix the top bracket.  
CAUTION:  
Reinforcement of the wall is  
required in case the wall is  
not strong enough to hold  
the appliance.  
Wall studs should be utilized when  
mounting the water heater to the wall.  
Alternately, a suitable piece of wood may  
be placed inside or outside of the wall to  
span the distance between the wall studs.  
Fasten the water heater mounting brackets  
to the wood.  
The brackets can be adjusted to change  
the distance between the back of the  
appliance and the wall within the range of  
3/8” (.95 cm) to 1½” (3.8 cm).  
Loosen the adjustment screws of both the  
top and the bottom brackets to adjust the  
distance. (See diagram below)  
In case of dry wall or concrete wall use  
dry wall anchors or lag bolts.  
1/8" (.32 cm)  
Clearance  
Wood Screw  
Upper Bracket  
TOP  
The water heater requires 120VAC/60Hz.  
Have a receptacle with ground terminal  
near the water heater. The length of the  
power supply cord is 10 feet (3 m),  
(Indoor water heater only.)  
Adjustment Screws  
Bracket  
Washer  
Washer  
Wood Screw  
Washer  
Install a wood screw for the upper bracket  
with a clearance of 1/8” (.32 cm) between  
the wall and the screw head. Hang the  
center of the upper bracket on the screw.  
Adjustment Screws  
Wood Screw  
Lower Bracket  
BOTTOM  
Bracket  
IMPORTANT: Do not  
Water Supply Connections  
Plumbing should be carried out by a  
qualified plumber in accordance with local  
codes.  
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  
additional water pressure (0.44 psi/ft)  
(10 kPa/m) must be ensured. The  
measurement should be calculated by  
the distance between the water inlet of  
the water heater (ground level) to the  
hot water faucet (upper floor level).  
Use approved plumbing materials only.  
heater. Any heat applied to  
the water supply fittings  
will permanently damage  
the internal components of  
the water heater.  
The diameter of the pipe lines should be a  
minimum of 3/4”.  
● Well water systems should be set to  
ensure a minimum system pressure of  
40 psi (276 kPa).  
To conserve energy and to prevent  
freezing, insulate both cold and hot water  
supply lines. DO NOT cover the drain or  
pressure relief valve.  
● When the water is supplied from a  
water supply tank, the height of the  
tank and the diameter of the pipes and  
their relation to water pressure, should  
be taken into consideration. Gravity  
water pressure is not recommended.  
To ensure proper operation of the water  
heater, the following water pressure  
guidelines should be followed:  
CAUTION: This water  
heater must only be used  
with the following water  
supply system conditions:  
● Operation of the water heater requires  
the minimum water pressure of 14 psi  
(97 kPa) and a minimum water flow  
rate of 0.66 gpm (2.5 lpm).  
Notice: If the water flow resistance of a  
shower head is too high, the burner in the  
water heater will fail to ignite. Keep the  
shower head clean from debris that could  
cause additional pressure drop.  
● With clean, potable water  
free of corrosive  
chemicals, sand, dirt, or  
other contaminates.  
● A water pressure of 40 psi (276 kPa) is  
required to achieve maximum flow rate.  
● With inlet water  
temperatures above  
32°F (0°C), but not  
exceeding 140°F (60°C).  
Notice: If using mixing valves on the  
outlet, choose one which prevents cold  
water pressure from overcoming hot water  
line pressure.  
● To maintain proper performance, ensure  
sufficient water supply pressure. The  
Required Water Pressure = Min.  
Operating Water Pressure  
(14 psi) (97 kPa) + Pipe Pressure Loss  
+ Faucet and Shower Pressure Loss +  
Safety Margin (more than 5 psi)  
(34 kPa).  
● Free of lime and scale  
deposits.  
Notice: If multiple water heaters are  
installed in a manifold system, the  
water piping must be in “Parallel”. A  
water pressure of 40 psi (276 kPa) is  
recommended for each water heater for  
proper operation of the water heaters.  
● DO NOT reverse the hot  
and cold water  
connections. The water  
heater will not operate.  
● To supply hot water to upper floors,  
10  
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Installing the water heater:  
Water Supply Connections Continued  
Water Filter  
Install a shutoff valve near the inlet of the Install a Check Valve between the water  
water heater for service and draining  
purposes.  
heater and the water shutoff valve. (See  
illustration the top left).  
It is not recommended to use pipes with  
smaller diameters than the water supply  
connection of the water heater.  
The following should be addressed in  
regards to the HOT WATER OUTLET:  
Clean the  
Water Filter  
Water Inlet  
Check Valve  
● Connections between the water heater  
and point(s) of use should be as short  
and direct as possible.  
Before connecting the water supply pipe  
to the water heater, open the shutoff valve  
and clean out sand, debris, air, caulking  
material, etc. inside the pipe. Connect to  
the water inlet, then check water flow.  
Close the shutoff valve and clean the  
water filter.  
Nipple  
● DO NOT use lead or plastic pipe.  
Water  
● To conserve energy and minimize heat  
loss, insulation of hot water piping is  
recommended. (See Hot and Cold Pipe  
Insulation Installation on page 24).  
Notice: Use only teflon tape on cold  
and hot water connections and  
lines.  
Be sure to connect the water inlet and the  
hot water outlet as shown on the water  
heater. If reversed, the water heater will  
not function.  
Notice: The flow rate of hot water may  
vary when more than two faucets  
(appliances, fixtures, etc.) are being used  
simultaneously.  
Hot  
Water  
Tap  
Installation of unions or flexible copper  
connections are recommended on the  
HOT and COLD water lines, so that the  
water heater may disconnect easily for  
servicing if necessary.  
Notice: The pipes MUST be completely  
drainable. If the hot water faucets are  
located at a point higher than the water  
heater, place a drain valve at the lowest  
point (see diagram to the left).  
Drain Valve  
Relief Valve  
A new pressure relief valve, complying  
with the Standard for Relief Valves and  
Automatic Gas Shut-Off Devices for Hot  
Water Supply Systems, ANSI Z21.22/  
CSA 4.4, must be installed at the hot  
water outlet connection of the water  
heater at the time of installation. Local  
codes shall govern the installation of  
relief valves.  
● The discharge line must be NO  
SMALLER than the outlet of the relief  
valve and must pitch downward to  
allow complete drainage (by gravity) of  
the relief valve and discharge line.  
Pressure  
Relief Valve  
● 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.  
For safe operation of the water heater, be  
sure that:  
Water  
Notice: Local codes govern the  
installation of relief valves. If local codes  
require that a temperature and pressure  
relief valve should be installed the  
manufacturer recommends a type 40XL  
Watts T&P relief valve or an equivalent  
model be used.  
Shutoff  
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.  
Union  
Cold  
Water  
Supply  
Inlet  
Relief  
Valve  
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.  
Notice: Manual operation of relief valves  
should be performed at least once a year.  
Turn off the electrical power and gas  
shutoff valve. Lift and release lever on the  
relief valve and check the manual  
operation of the relief valve. You should  
take precaution to avoid contact with the  
hot water coming out of the relief valve  
and to prevent water damage.  
Hot Water  
Supply  
Outlet  
Notice: The above illustrates a  
pressure only relief valve. If local  
codes require a combination  
● No valve of any type should be  
installed between the relief valve and  
the water heater  
temperature and pressure relief  
valve be installed, an extension  
piece may be needed. (Refer to  
page 22 or 23 for example of  
extension piece for T&P relief  
valve installation.) The T&P relief  
valve probe should not be directly  
in the flow path of the water.  
● Discharge from the relief valve should  
be piped to a suitable drain to eliminate  
potential water damage. Piping used  
should be of a type approved for the  
distribution of hot water.  
Notice: If the relief valve on the system  
discharges periodically, a problem exists  
and service to the water system is  
required.  
● Hot and cold water lines should be  
insulated up to the water heater. Refer  
to page 24 for details.  
11  
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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 supplied Manual Gas Appliance  
Shutoff Valve must be installed at the gas  
connection of the water heater at the time  
of installation (see diagram to the left).  
A sediment trap should be installed at the  
bottom of the gas line.  
Manual  
Gas  
Supply  
Line  
Shut-off  
Valve  
Do not use excessive force  
(over 31.5 ft lbs.) (42.7 Nm) in tightening  
the pipe, particularly if teflon pipe  
compound is used, as the unit may be  
damaged.  
The branch gas supply line to the water  
heater should be a minimum of 3/4” black  
steel pipe or other approved gas piping  
material.  
The inlet gas pressure to the water heater  
must not exceed 10.5” w.c. (2.6 kPa) for  
natural 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.  
A ground joint union or ANSI design  
certified semi-rigid or flexible gas  
Manual Gas  
Appliance  
appliance connector should be installed in  
the gas line close to the water heater. The  
National Fuel Gas Code (NFGC) ANSI  
Z223.1 and CAN B149 code mandates a  
manual gas shut-off valve: See NFGC &  
B149 for complete instructions.  
Shut-off  
(Supplied)  
Union  
If flexible connectors are used, the  
maximum length shall not exceed  
36” (91 cm).  
NOTICE: To ensure proper operation  
of the heater the gas pipe and gas  
meter must be sized correctly.  
Sediment  
Trap  
Cap  
If lever type gas shut offs are used, they  
shall be T-Handle type.  
Gas piping shall be in accordance  
with local, utility company require-  
ment and/or in the absence of local  
codes, use the latest edition of the  
National Fuel Gas Code. In Canada  
the latest edition of CSA B149.1 Nat-  
ural Gas and Propane installation  
code.  
Compound used on the threaded joints of  
the gas piping must be of the type  
resistant to the action of LP gas. Use  
compound sparingly on male threads only.  
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.  
Use a soapy water solution to test for  
leaks at all connections and fittings.  
Bubbles indicate a gas leak that must  
be corrected.  
Turn on the gas shut-off valve(s) to  
the water heater.  
The factory connections should also be  
leak tested after the water heater is placed  
in operation.  
Pressure Testing the Gas Supply System  
WARNING: Install a  
gas pressure regulator, in  
the gas supply line, which  
does not exceed the  
The water heater and its manual gas shut-  
off valve must be disconnected from the  
gas supply piping system during any  
pressure testing of the system at  
pressures in excess of 1/2 psi (14” w.c.)  
(3.5 kPa).  
The water heater must be isolated from  
the gas piping system by closing the  
manual gas shut-off valve during any  
pressure testing of the gas supply piping at  
pressures equal to or less than  
maximum supply pressure.  
DO NOT use an industrial  
type gas regulator.  
1/2 psi (14” w.c.) (3.5 kPa).  
High Altitude  
Input rating of this water heater is  
based on sea level operation. At  
higher elevations the actual input  
rate may be lower than the value list-  
ed on the rating label. This water  
heater can be installed at elevations  
up to 3,280 feet (1000 m)without any  
change or modification.  
NOTICE: For installations above  
3,280 feet (1000 m) elevation, the  
connector on the PC board must be  
replaced. Do not install this water  
heater at elevations above 3,280 feet  
(1000 m) without installing the proper  
high altitude connector. Please contact  
your local distributor, dealer, or Rheem  
for replacement connector.  
NOTICE:  
Select models may be available preset  
for operations at elevations up to 6,560  
feet (2000 m).  
12  
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Installing the water heater:  
The water heater must be installed with a RTG20002B vent adapter or a UL approved Category III Stainless  
Steel equivalent.  
Venting  
DANGER: Failure to  
The installation of venting must comply with Vent pipe runs must be adequately supported  
install the vent adapter 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  
death, serious injury,  
national codes, local codes, and the vent  
manufacturer’s instructions.  
along both horizontal and vertical runs.  
The maximum recommended unsupported  
span should be no more than five (5) feet  
(1.5 m) Support isolation hanging bands  
should be used. DO NOT use wire. (See  
The water heater must be vented to the  
outdoors as described in these instructions.  
DO NOT connect this water heater to a  
Chimney. It must be vented separately from  
all other appliances.  
NO!  
YES!  
explosion, or fire. To avoid  
the risk of fire, explosion,  
or asphyxiation from  
All vent components (adapters, pipe, elbows,  
terminals, etc.) should be UL1738 Certified  
Stainless Steel Venting Material  
(e.g. AL29-4C).  
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.  
diagram below).  
The specified vent termination must be used.  
The termination should be a 90° elbow type  
with screen. (Refer to page 17)  
Notes on pre-existing vent:  
If the water heater is being installed as a  
replacement for an existing water heater, a  
thorough inspection of the existing venting  
system must be performed prior to any  
installation work. Verify that the correct  
materials, vent lengths and terminal locations  
as detailed in this Use and Care manual have  
been met. Carefully inspect the entire  
Use a vent pipe with an anti-disconnection  
structure.  
The use of a High Temperature Silicone  
(500°F) (260°C) may be required to seal vent  
connections. To prevent accidental gas  
exhaust leakage, apply a 1/4” (6 mm) wide  
bead approximately 1/4” (6 mm) from the  
end and another bead against the joint side of  
the stop bead.  
WARNING: Use UL  
approved Category III  
Stainless Steel vent material  
only. No other vent  
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. Check the system for signs of  
sagging or other stresses in the joints as a  
result of misalignment of any components in  
the system. 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  
material is permitted.  
Follow vent manufacturer’s installation  
instructions.  
WARNING: Refer to  
page 7 for clearances to  
combustible material.  
The unit can be vented either horizontally or  
vertically.  
putting the water heater into service.  
Venting Lengths  
Number of  
90° elbows  
(bends)  
Maximum  
Length of  
MAXIMUM VENT LENGTH - The  
system will not operate if there is excessive  
restriction (pressure drop) in the venting  
system. A maximum of 47 feet 6 inches  
(14.4 m) of vent pipe may be used provided  
there is only one 90° elbow in the system. If  
additional elbows are required: two elbows  
horizontal run toward the vent terminal (see  
diagram below). This ensures that any  
condensate formed during operation of the  
unit is evacuated from the appliance.  
Straight Pipe  
1
2
3
47’ 6”  
(14.4 m)  
A 1/4” per foot upward slope is acceptable  
when it is not possible to vent with a  
downward slope, however, a UL approved  
Category III Stainless Steel condensate trap  
MUST be installed at the beginning of the  
horizontal run (See page 17 “Typical  
Horizontal Termination  
can be used with 42 feet 6 inches (13 m)  
and three elbows can be used with 37 feet 6  
inches (11.4 m) of vent pipe.  
,
42’ 6”  
(13 m)  
A 90° elbow is equivalent to 5 feet (1.5 m)  
37’ 6”  
(11.4 m)  
to straight pipe. A 45° elbow is equivalent to w/ 1/4” per foot UPWARD Slope” or  
2 feet 6 inches (76 cm) of straight pipe.  
page 18, “Standard Vertical Vent  
Termination” for examples).  
The termination elbow does not count as an  
elbow when determining total vent lengths.  
MINIMUM VENT LENGTH - The  
venting may be as short as 12” (30 cm),  
provided one vent termination is installed to  
the outdoors through a sidewall, one 90°  
elbow is included in the installation, and the  
wall thimble is installed.  
The vent can be installed with a slight  
downward slope of 1/4” per foot of  
Vent Seam  
1/4" per foot  
downward slope.  
Notice: Make sure that the seam of the vent  
pipe in horizontal runs is toward the top of  
the installation (see illustration to the far  
left).  
Min. 3"  
(8 cm)  
Max. 3 feet (91 cm)  
13  
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Venting Through Closed Spaces  
If the vent piping passes through a closed space, a minimum  
clearance of 8” (20 cm) when installed horizontally, 6” (15 cm)  
when installed vertically should be maintained between the vent  
pipe and combustibles and noncombustibles. Be sure to follow  
local codes.  
1/4” per foot  
downward slope  
Wall Thimble  
For maintenance and inspection purposes, the following access  
panels are required.  
● Two (2) inspection access panels large enough to allow  
access for venting inspection. One (1) of these access  
panels should be close to where the vent pipe enters the  
ceiling. The other access panel should be near the vent  
termination.  
● A ventilation access panel with a 16 in2 (103 cm2) opening  
should be provided every 10 ft (3 m).  
Vent Pipe  
Ceiling  
Board  
Inspection  
Access Panel #1  
Inspection  
Access Panel#2  
Vent Adapter  
A UL 1738 approved stainless steel vent  
adapter is required for vent connection.  
● Tighten the clamp around the collar.  
● Inspect the inside of the adapter to  
verify that the collar and adapter are  
sealed. If more sealant is required,  
apply sealant to a flat tool, then spread  
around the collar edge on inside of  
adapter.  
Exhaust  
Flow  
Read the following instructions before  
installation.  
● Test fit the adapter over the water  
heater collar before proceeding. Adjust  
clamp as needed.  
Vent Adapter  
RTG20002B  
Clamp  
A
● Ensure that the clamp does not interfere  
with the damper shaft.  
High Temp.  
Sealant  
● With an alcohol wipe, clean inside  
surface "A" of adapter and outside  
surface of "B" of heater collar.  
Collar  
B
NOTICE: Follow the vent adapter  
manufacturer’s instructions  
Water Heater  
● Apply 1/4" (6 mm) wide bead of high  
temperature silicone (500°F) (260°C)  
around outside of heater collar "B".  
● Slide adapter end "A" down over heater  
collar "B" as far as it will go.  
Draining the Condensate  
In order to prevent condensate from  
draining back into the water heater, a  
condensate trap and drain must be  
installed in a horizontal vent section as  
close as practical to the water heater vent  
connection, uless the water heater is  
vented horizontally with a 1/4” per foot  
DOWNWARD slope towards the vent  
terminal as shown below.  
Condensate is known to be acidic; refer to  
local, state (provincial) or federal codes  
for proper handling and discharge  
methods.  
1/4” per foot downward slope  
3” (8 cm) Clearance  
3’  
(91 cm)  
Max  
Support  
Hanger  
Vent  
Adapter  
14  
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Installing the water heater.  
AREA WHERE TERMINAL IS NOT PERMITTED  
AIR SUPPLY INLET  
VENT TERMINAL  
V
X
Horizontal Vent Terminal Location  
The following information should be used for determining the proper location of the vent terminal  
for indoor and outdoor tankless water heaters.  
1
2
Canadian Installations  
US Installations  
A= Clearance above grade, veranda,  
porch, deck or balcony.  
12 inches (30 cm) above anticipated  
snow level.  
12 inches (30 cm) above anticipated  
snow level.  
B= Clearance to window or door that  
may be opened.  
6 inches (15 cm) for appliances < 10,000  
Btuh (3 kW), 12 inches (30 cm) for  
appliances > 10,000 Btuh (30 cm) for  
appliances > 10,000 Btuh (30kW), 36  
inches (91 cm) for appliances > 100,000  
Btuh (30kW).  
4 feet (1.2 m) below or to side of  
opening; 1 foot (300 mm) above opening.  
C= Clearance to permanently closed  
window.  
*
*
D= Vertical Clearance to ventilated soffit  
located above the terminal within a  
horizontal distance of 2 feet (61 cm)  
from the center line of the terminal.  
4 feet (1.2 m)  
4 feet (1.2 m)  
E= Clearance to unventilated soffit.  
F= Clearance to outside corner.  
G= Clearance to inside corner.  
*
*
*
*
*
*
M = Clearance under veranda, porch,  
deck or balcony.  
3 feet (91 cm)  
3 feet (91 cm)  
1 In accordance with current CAN/CGA-B149 Installation Codes.  
2 In accordance with current ANSI Z223.1/ NFPA 54 National Fuel Gas Code.  
1
2
Canadian Installations  
US Installations  
H = Clearance to each side of center line  
*
3 feet (91 cm) within a height 15 feet  
(4.57 m) above the meter/regulator  
assembly.  
extended meter/regulator assembly.  
above  
I = Clearance to service regulator vent  
outlet.  
3 feet (91 cm)  
*
J = Clearance to nonmechanical air  
supply inlet to the combustion air  
inlet to any building or other  
appliance.  
4 feet (1.2 m) below or to side of  
opening; 1 foot (300 mm) above opening.  
6 inches (15 cm) for appliances < 10,000  
Btuh (3 kW), 12 inches (30 cm) for  
appliances > 10,000 Btuh (30 cm) for  
appliances > 10,000 Btuh (30kW), 36  
inches (91 cm) for appliances > 100,000  
Btuh (30kW).  
6 feet (1.83 m)  
3 feet (91 cm) above if within 10 feet (3  
m) horizontally.  
K = Clearance to mechanical air supply  
inlet.  
L = Clearance above paved side walk or  
7 feet (2.13 m)  
7 feet (2.13 m)  
paved driveway located on public  
property.  
M = Clearance under veranda, porch,  
deck or balcony.  
Not Allowed  
Not Allowed  
+
A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and  
serves both dwellings.  
*
If clearances are not specified then follow local installation codes and the requirement of the gas supplier.  
15  
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Installing the water heater:  
Additional Considerations  
Outdoor Water Heater  
Do Not install vent terminal under any patio or deck.  
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.  
Caulk  
Rising moisture will collect under eaves  
(1.8 m)  
To help prevent water lines from freezing do not locate vent  
terminal on the side of a building with prevailing winter  
winds.  
6'  
If soffit vent is too close,  
6' (1.8 m)  
block off and install new  
caulk zone or  
vent at another location  
to edge of  
window etc., starting  
within 6' (1.8 m)  
Inside  
corner  
6' (1.8 m) caulk  
zone  
Do Not terminate vent directly on brick or masonry surfaces.  
A rust-resistant sheet metal backing plate  
(2 x 2 feet) (60 x 60 cm) is recommended behind vent. (See  
illustration.)  
Caulk  
Caulk  
Do Not locate vent terminal too close to shrubbery, as flue  
gasses may damage them.  
4'  
(1.2 m)  
Caulk all cracks, seams and joints within six (6) feet (1.8 m)  
of vent terminal.  
Caulk around thimble face plate for weather tight seal.  
Indoor Water Heater  
All painted surfaces should be primed to lessen the chance of  
physical damage. Painted surfaces will require maintenance.  
Caulk  
Insulate vent pipe of indoor water heaters exposed to cold  
conditions (attics, crawl spaces, etc.) with inflammable  
material to help prevent moisture from accumulating in vent  
pipe.  
Rising moisture will  
collect under eaves.  
If soffit vent is too close,  
block off and install new  
6’  
Do Not extend exposed vent pipe of indoor water heaters  
outside of building.  
vent at another location.  
(1.8 m)  
Inside  
Corner  
Caulk  
6’ (1.8 m)  
Caulk  
6’ (1.8 m)  
zone or to edge of window  
Caulk Zone  
Guard vent against accidental contact with people and pets.  
etc.,starting within 6’ (1.8 m).  
Caulk  
RTV silicone caulk  
2 ft. sq. (60 x 60 cm) sheet metal plate on  
brick or masonary surface, recommended.  
4’  
(1.2 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  
16  
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Vent Horizontal Wall Thimble Installation  
Outer Thimble  
Section  
Inner Thimble  
Section  
An approved 4 inch (10 cm) Vent  
more caulking.  
Horizontal Wall Thimble must be used.  
Use 4 hollow wall anchors, at least  
1/8” (.32 cm) in diameter and of  
The Wall Thimble requires mechanical  
support from the wall sufficient to support  
any incidental loads on the system. If the  
wall is not sufficient enough to support the  
Wall Thimble, then appropriate additional  
framing and/or blocking is required.  
appropriate length for the thickness of  
the sheathing, if sheathing is particle  
board or other composite material. Use  
4 #10x1-1/4” wood screws for plywood,  
solid wood sheathing or members. Use  
suitable masonry anchors when passing  
through solid masonry walls. Reinstall  
the decorative sheathing around the  
Wall Thimble. This assembly may be  
painted to match the exterior decor.  
Side View  
Inner Wall  
INSTALLATION PROCEDURE:  
Prepare an opening for the Wall Thimble  
in the wall. The opening must be  
6-1/2 inches (16 cm) in diameter for a  
4 inch (10 cm) vent system.  
Outer Thimble  
Section  
Inner Thimble  
Section  
90° Elbow  
Vent  
Pipe  
● Attach a screened 4 inch (10 cm)  
termination fitting to the female end of  
a vent section or slip connector. Use the  
method described in the Venting  
installation instructions (page 13). Slide  
the vent in through the outside of the  
Thimble and seal the annular space  
with a thick bead of caulk.  
90° termination  
with screen  
Outer  
Wall  
If there are not sufficient support members  
to secure the Wall Thimble or if there is a  
semirigid foam insulation layer under the  
sheathing, appropriate fasteners must be  
used to secure the Wall Thimble to the  
support members.  
Caulk for  
weather seal  
Water  
Heater  
Outside Wall  
The Wall Thimble is designed to adapt to  
any wall thickness from 3-1/2” (9 cm) to  
6” (15 cm) thick. If the wall is thicker  
than 6” (15 cm) the Wall Thimble may be  
extended using a piece of 6” (15 cm)  
diameter snaplock or welded seam  
● Slide the interior portion of the Thimble  
into the inside hole. Be certain the  
interior and exterior Thimble halves  
overlap at least 1” (2.5 cm). If  
insufficient overlap exists, extend the  
interior portion with single wall  
galvanized pipe.  
Mounting  
Brackets  
Side View  
galvanized pipe up to 6” (15 cm) long.  
Select the larger diameter half of the Wall  
Thimble for the outside of the wall.  
WARNING: Use UL  
approved Category III vent  
material only. No other  
vent material is permitted.  
● Secure the Wall Thimble to the interior  
sheathing using suitable fasteners.  
● Apply a continuous bead of high  
quality silicone or silicone/latex caulk  
on the inside of the outer flange. This  
will be the only weather seal to keep  
moisture outside the building. Ensure a  
sufficient seal is made.  
● Secure the vent section or slip  
connector that protrudes through the  
Wall Thimble to the rest of the vent  
system as described in the Venting  
installation instructions (page 13).  
CAUTION: Follow the  
vent manufacturers  
installation instructions as  
design might vary from  
manufacturer to  
● Position this portion of the Wall  
Thimble into the prepared hole from the  
outside. Secure the assembly into the  
prepared opening using fasteners as  
indicated by sheathing or structural  
members, sealing the screw heads with  
manufacturer.  
1/4” per foot upward slope  
1/4” per foot downward slope  
3” (8 cm) Clearance  
3” (8 cm) Clearance  
3’  
(91 cm)  
Max  
3’  
(91 cm)  
Max  
Support  
Hanger  
Support  
Hanger  
Condensate  
Trap  
To Drain. Dispose of  
Vent  
Adapter  
Vent  
Adapter  
condensate in accordance  
to local codes  
Typical Horizontal Termination  
w/ ¼” per foot DOWNWARD Slope  
Typical Horizontal Termination  
w/ ¼” per foot UPWARD Slope  
17  
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Installing the water heater.  
Vertical Vent Termination Location  
The location of the vent terminal depends on the following  
Small (6” min) (15 cm)  
minimum clearances and considerations (see illustration):  
section of vent  
Elbow  
Minimum twelve (12) inches (30 cm) above roof.  
Minimum twelve (12) inches (30 cm) above  
anticipated snow level.  
Maximum twenty-four (24) inches (60 cm) above  
roof level without additional support for vent.  
Vent Pipe  
Through Roof  
Min. 12" (30 cm)  
Above Roof  
Four (4) feet (1 m) from any gable, dormer or other  
roof structure with building interior access (i.e., vent,  
window, etc.).  
Min. 12" (30 cm)  
Above Anticipated  
Snow Level.  
Termination Elbow  
w/ Protective Screen  
Ten (10) feet (3 m) 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.  
Max. 24" (60 cm)  
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. Complete the vent pipe  
Install adequate flashing where the vent  
pipe passes through the roof. Determine  
the vent terminal height and install the  
vent pipe accordingly. Refer to the  
installation to the water heater's vent  
connector fitting on the water heater vent  
illustration above for proper vent terminal  
height. Connect vent elbow on to vertical  
collar outlet. Support vertical or horizontal pipe through roof. Connect short piece of  
runs as previously mentioned. If required,  
use silicone sealant at the point the vent  
connector joins the water heater.  
vent pipe (approximately 6" long (15 cm))  
to elbow, and the terminal elbow with the  
protective screen.  
Rain Cap  
Storm  
Storm  
Collar  
Collar  
Adjustable  
Adjustable  
Roof Flashing  
Roof Flashing  
Roof Jack  
Roof Jack  
Support  
Clamp  
Firestop  
Support  
Clamp  
Firestop  
Chase Requires  
6” (15 cm) Clearance  
to Combustibles  
Chase Requires  
6” (15 cm) Clearance  
to Combustibles  
1/4” per foot upward slope  
1/4” per foot upward slope  
3” (8 cm) Clearance  
3” (8 cm) Clearance  
Firestop  
Firestop  
3’  
3’  
(91 cm)  
Max  
Support  
Hanger  
(91 cm)  
Max  
Support  
Hanger  
Condensate  
Trap  
Condensate  
Trap  
To Drain. Dispose of  
condensate in accordance  
to local codes  
To Drain. Dispose of  
condensate in accordance  
to local codes  
Vent  
Vent  
Adapter  
Adapter  
Alternate  
Vertical Vent Termination with Rain Cap  
Standard Vertical Vent Termination  
18  
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WARNING: Field wiring connections and electrical grounding must comply with local  
codes, or in the absence of local codes, with the latest edition of the National Electrical Code,  
ANSI/NFPA 70, or in Canada, Canadian Electrical Code, CSA C22.1 Part 1.  
Remote Control Installation  
One (1) remote control is provided with  
the water heater.  
● The MAXIMUM distance between the  
water heater and the remote control  
installation location is limited to 195  
feet (59 m) of wire.  
NOTICE: The provided  
remote control will allow  
a maximum temperature  
setting of 120°F (49°C).  
Temperatures of up to  
180°F (82°C) can be  
achieved with dip switch  
adjustment. Only qualified  
service personnel should  
perform this adjustment.  
The following are considerations for  
determining the location of the remote  
control(s):  
NOTICE: Only main remote control  
(UMC-117) and manifolding control can  
be connected to the water heater.  
● DO NOT install any remote control  
outdoors or areas were it can come in  
contact with water.  
No other manufacturer’s controls are  
suitable for use with this water heater.  
●
●
Place remote control out of children’s reach.  
DO NOT attempt to disassemble the  
remote control.  
The remote control can be installed in  
convenient locations such as the kitchen,  
laundry room, utility room, or directly beside  
the indoor water heater.  
● Avoid areas where the remote control  
may be exposed to heat, e.g. stove  
ranges or heaters.  
● Avoid areas where the remote control  
may be subjected to oil and/or steam  
from cooking.  
● Avoid areas where chemical agents  
(such as thinner, benzine and alkaline)  
are used.  
● Avoid areas of direct sunlight.  
Base Plate  
MAIN  
Control  
PRIORITY  
°F  
PO  
WER  
ON/OFF  
Mounting Screw x 2  
Control screw  
Remote Control  
Model Number  
Remote Control  
Description  
Temperature  
Availability  
Set Point Range  
100°F - 120°F  
Factory Default  
(38°C)-(49°C)  
UMC-117  
MAIN  
125°F - 180°F  
(52°C)-(82°C)  
With Dip Switch  
Adjustment  
NOTICE:  
Manifolding Applications: Certain Commercial installations may require more than  
one water heater piped together in a manifold to supply enough capacity for high  
temperature and/or water flow applications. Special manifolding control kits are  
available for operating multiple heaters together. Contact your dealer for details.  
19  
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Installing the Main Remote Control.  
WARNING: Field wiring connections and electrical grounding must comply with local  
codes, or in the absence of local codes, with the latest edition of the National Electrical Code,  
ANSI/NFPA 70, or in Canada, Canadian Electrical Code, CSA C22.1 Part 1.  
Remote Control Installation  
NOTICE: Extension cable  
Connecting the MAIN (UMC-117 )  
remote control to the water heater:  
Connecting the remote control to the  
water heater:  
can be any Type-T 18 AWG  
wire similar to a thermostat  
wire and need not be  
● Drill a 1” (2.5 cm) to 1.5” (4 cm) hole  
at the proposed control location.  
● Ensure that the power to the water  
heater has been disconnected.  
polarity sensitive.  
● Install the extension cable between the  
location of the remote control and the  
water heater.  
● Remove the front cover of the water  
Do Not apply sealant to the  
remote control cable.  
heater.  
● Insert the remote control extension  
cable throught the hole at the bottom  
right hand corner of the water heater.  
● Remove the base plate from the control.  
It is not recommended to  
have wiring exposed.  
● Draw the remote control extension  
cable through the central in the base  
plate.  
● Connect the wires to the terminals on  
the top right hand side of the Printed  
Circuit Board (PCB) as shown in  
illustration to the left.  
Remote Control  
● Fix the base plate to the wall using  
Connection Terminals  
suitable screws and wall anchors.  
PCB  
Ensure the projections on the base plate NOTICE: The remote control wire  
are pointing upwards.  
connection terminals are not polarity  
sensitive.  
● Connect the remote control cables to  
the extension cable from the water  
heater.  
● Firmly tighten the terminal screws.  
● Secure the remote control extension  
cable using the appropriate clamp.  
● Place the remote control over the base  
plate. Ensure the projections in the  
base plate fit into the housings in the  
remote control.  
● Replace the front cover of the water  
heater.  
● Switch on the power supply to the  
water heater.  
● Fix the control to the base plate at the  
bottom of the remote control using the  
screw provided.  
● Ensure proper operation of the remote  
control and water heater.  
● Proceed to “Connecting the remote  
control to the water heater”, to  
complete installation.  
Clamp  
NOTICE: If water heaters are in a  
manifold system the main remote control  
connected to the mainfold controller  
(MIC-180) has priority over remote controls  
connected to the water heaters.  
18 AWG  
Gas Valve  
Extension  
Cable  
Projections  
Remote  
Control  
Extension  
Cable  
Wall  
Penetration  
Suitable  
Wall Anchors  
Control  
Screw  
Base Plate  
Screws  
20  
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WARNING: Field wiring connections and electrical grounding must comply with local  
codes, or in the absence of local codes, with the latest edition of the National Electrical Code,  
ANSI/NFPA 70, or in Canada, Canadian Electrical Code, CSA C22.1 Part 1.  
Electrical Connection  
POWER CORD (Indoor water heaters  
only):  
HARDWIRING THE ELECTRICAL  
CONNECTIONS (Indoor or Outdoor  
water heaters):  
WARNING: Shock  
hazard line voltage is  
present. Before servicing  
the water heater, turn off  
the electrical power to the  
water heater at the main  
disconnect or circuit  
● The electric power supply requirement  
for this water heater is 120 VAC/60HZ,  
2 Amps.  
● Wiring should be carried out by a  
qualified electrician in accordance with  
local codes.  
● The water heater comes with a three (3)  
pin power supply cord (INDOOR  
MODELS ONLY). Use only a power  
outlet with a ground terminal.  
● The water heater requires 120 VAC/60Hz  
and should be properly grounded.  
breaker. Failure to do so  
could result in severe  
personal injury or death.  
● DO NOT connect grounding wire to  
water pipes, gas pipes, telephone  
cables, lightning conductor circuits and  
to grounding circuit of other equipment  
that carry a ground-fault interrupter.  
● The installation of an electric leakage  
breaker is recommended.  
CAUTION: Label all  
wires prior to  
disconnection when  
servicing controls. Wiring  
errors can cause improper  
and dangerous operation.  
Verify correct operation  
after servicing.  
● Keep any excess of the power supply  
cord on the outside of the water heater.  
● An ON/OFF switch must be provided  
and installed for the incoming  
120VAC power.  
● If local codes require hardwiring, see  
instructions for “Hardwiring the  
Electrical Connections”.  
● Wire the water heater exactly as shown  
below. A wiring diagram is also found  
inside of the cover panel.  
● A green screw is provided in the  
junction box for grounding connection.  
● Connect the live wire to black leg wire  
and the neutral wire to the white neutral  
wire.  
WATER VOLUME  
CONTROL MOTOR  
Ground Screw  
WIRING DIAGRAM  
AIR  
MAIN  
REMOTE  
CONTROL  
(UMC-117)  
BATH  
REMOTE  
CONTROL1  
(USC1-117)  
BATH  
REMOTE  
CONTROL2  
(USC2-117)  
LIMITER  
MOTOR  
INTAKE  
FILTER  
SWITCH  
COLOUR CODE  
R:RED  
W:WHITE  
SW1  
SW2  
B
R
GR  
Y
B
O
W
BR  
MAX  
BR:BROWN  
BK:BLACK  
B:BLUE  
MIN  
BUTTON  
W
W
BUTTON  
8
FAN  
FM  
SW3  
MOTOR  
ON  
OFF  
DIP SWITCH  
8
BK  
R
GY:GRAY  
7
6
5
4
3
2
1
5
4
3
2
1
ADJUSTER  
BUTTON  
A
D
2
E
GR:GREEN  
O:ORANGE  
Y:YELLOW  
G/Y:GREEN/YELLOW  
GR  
Y
F
1
3
2
4
6
W
B
5
4
3
2
1
B
B
R
O
Y
O
G
O
W
2
BR  
P
1
LED  
M
L
FLAME ROD1  
FLAME ROD2  
FLAME ROD3  
W
R
B
CONNECTOR FOR CHECKING  
T
THERMOELECTROMOTIVE FORCE  
2
7
6
5
4
3
2
1
1
B
W
1U  
GR  
WATER BY-PASS  
WV  
Y
Q
3
GR  
SOLENOID VALVE  
R
OVER HEAT  
LIMITER  
W
2
2
BK  
BK  
R
H
W
3 6  
2 5  
1
IGNITER  
IG  
1
1
BKELECTRODE  
R
GY  
GY  
WATER  
FLOW  
FOR INDOOR  
S
4
BK  
BR  
MODEL ONLY  
R
SENSOR  
TRANSFORMER  
R
4
1
B
Y
W
FUSE(3A)  
CIRCUIT  
BOARD  
I
5 2  
6 3  
Junction  
Box  
BK  
AC  
BK  
G/Y  
W
BK  
W
BK  
W
BK  
G/Y  
100V  
FUSE  
J
W
(5A)  
R
K
GND  
R
AC  
(BLUE)W  
GND  
T
H
E
120V  
Wire  
Connections  
W
R
W
W
BK  
R
M
O
C
O
U
P
BK  
BK  
R2  
BK  
R1  
BK  
BK  
BK  
BK  
(REDW)  
BK  
R3  
BK  
BK  
-
+
PSV  
W
R4  
W
W
SV3  
SV2  
SV1  
SV0  
FROST  
OHT  
UOH  
TTE  
AAT WIT  
MIH ANH  
BRE  
TLE  
EER  
HET  
EXH  
ACE  
THR  
AM  
NI  
(REDW)  
ANTI-FROST  
HEATER  
PROTECTION  
THERMOSTAT  
V
S
S
S
G S  
W
W
A
L
V
E
L
O
O
O
AO  
L
R
I
R
E
BK  
L V  
E A  
N L  
OV  
I E  
D
L V L V  
E A E A  
N L N L  
OV OV  
S L V  
E A  
EWM  
TAI  
TS  
E M RTM  
THE CONNECTORS OF DUAL AND MULTIPLE  
ARE INTERAPPLICABLE TO THE BODY  
CONNECTORS EACH OTHER.(RED)  
N
T
I
S
T
O
R
I
S
T
O
R
I N L  
NOV  
L I E  
E D  
On/Off  
Switch  
GS  
FOR INDOOR  
MODEL ONLY  
ET  
RO  
R
ET  
RO  
I E  
I E  
D
D
R
1
3
2
T
0
21  
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Installing the water heater.  
Typical Installation of Indoor Water Heater  
Outside Wall  
1/4" Per Foot Downward Pitch  
90° Elbow  
Wall Thimble  
Vent Termination  
With Protective  
Screen  
Vent Adapter  
PRIORITY  
°F  
POWER  
ON/OFF  
Outside Wall  
Remote  
Control  
Manual  
Gas Supply Line  
Shut-off  
Power  
Supply  
Cord  
To Hot Water  
Faucet(s)  
Valve  
Union  
Manual Gas  
Appliance  
Check  
Valve  
Shut-off  
(supplied)  
Union  
Water Filter  
Drain Valve  
Relief  
Valve  
Vacuum Relief Valve  
(Not Supplied)  
Sediment  
Trap  
Cap  
Cold Water  
Supply  
Shut-off  
Valve  
Discharge  
Line  
(To Suitable Drain)  
If required, install per local codes  
and valve manufacturer’s  
instructions.  
6" (15 cm) Air Gap  
NOTICE: The National Fuel Gas Code (NFGC) and B149 mandates a manual gas shut-off valve:  
See NFGC/B149 for complete instructions. Local codes or plumbing authority requirements may  
vary from the instructions or diagrams provided and take precedent over these instructions.  
22  
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Installing the water heater:  
Typical Installation of Outdoor Water Heater  
To Hot Water  
Faucet(s)  
Union  
Relief  
Valve  
Drain Valve  
Discharge  
Line  
(To Suitable Drain)  
6" (15 cm) Air Gap  
23  
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 does not store  
water making an insulation blanket  
unnecessary.  
shorten the life of the water heater and may  
endanger life and property.  
WARNING: If local  
codes require external  
application of insulation  
blanket kits the  
The manufacturer disclaims any responsibility  
for such loss or injury resulting from the use  
of such unauthorized devices.  
manufacturer’s instructions  
included with the kit must  
be carefully followed.  
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 operation  
of the water heater:  
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  
● Do not cover the air inlet, flue outlet, or  
operating and warning labels attached to  
the water heater or attempt to relocate them  
on the exterior of insulation blanket.  
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  
Hot and Cold Pipe Insulation Installation  
Insulate all the  
way to the top  
NOTICE: The hot and cold  
pipes should be insulated as  
shown to provide additional  
freeze protection.  
Gas Inlet  
ck Valve  
Inlet Pipe  
Ht  
Waer  
Cold Water  
For increased energy efficiency, use pipe  
insulation. Please install the insulation,  
according to the illustrations above,  
making sure to insulate all the way to the  
top. Do not cover any drain or pressure  
relief valve(s).  
During Installation of this water heater...........  
Do’s  
Don’ts  
❑
Do follow all installation instructions  
❑
Don’t block or restrict Air Intake  
convered in this manual.  
Opening located bottom left corner of the  
water heater.  
❑
Do check inlet gas pressure to ensure that  
it is within the range specified on the rating  
❑
Don’t remove the front cover unless  
plate.  
absolutely necessary. This should only be  
done after being examined by a qualified  
service technician.  
❑
Do provide adequate air for combustion  
and ventilation as discussed in the Use &  
Care Manual and the National Fuel Gas  
Code (CAN/CGA B149 in Canada).  
❑
Don’t install this product where standing  
water may occur.  
❑
Do maintain proper clearances to  
❑
Don’t use pipe dope on water line  
combustibles and non-combustibles as  
connections and fittings.  
specified on the nameplate.  
❑
Do ensure that the venting system  
complies with the guidelines found in the  
Use & Care Manual and National Fuel Gas  
Code (CAN/CGA B149 in Canada).  
❑
Do contact local gas company to ensure  
gas meter and gas piping are adequately  
sized.  
❑
Do use teflon tape on water line  
connections and fittings.  
24  
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Installing the water heater:  
Installation Check List  
E. Gas Supply  
A. Outdoor Water Heater Location  
❑
Gas type matches rating plate.  
❑
❑
Outdoor water heaters must be installed outdoors.  
Protected from freezing temperatures.  
❑
Gas supply pressure is sufficient for the water  
heater.  
B. Indoor Water Heater Location  
❑
Gas line equipped with shut-off valve, union and  
sediment trap.  
❑
❑
Close to area of vent termination.  
❑
❑
Approved pipe joint compound used.  
Indoors and protected from freezing temperatures .  
Soap and water solution used to check all  
connections and fittings for possible gas leak.  
C. Outdoor and Indoor Water Heater Location  
❑
Gas Company inspected installation (if required).  
❑
Proper clearance from combustible surfaces  
observed.  
F. Relief Valve  
❑
❑
❑
Sufficient fresh air supply for proper operation of  
water heater.  
❑
Pressure Relief Valve properly installed and  
discharge line run to open drain  
Air supply free of corrosive elements and  
flammable vapors.  
❑
Discharge line protected from freezing.  
G. Venting (Indoor Water Heaters Only)  
Provisions made to protect area from water  
damage.  
❑
❑
Materials used are as instructed in the manual.  
Vent connector(s) pitched downward to termination  
(¼" per foot of length minimum) See page 13.  
❑
❑
Sufficient room to service heater.  
Combustible materials, such as clothing, cleaning  
materials, rags, etc. clear of the heater and vent  
piping.  
❑
Vent connector(s) securely fastened together with  
high temperature silicone (500°F) (260°C) and air-  
tight.  
❑
Water heater is properly attached to the wall.  
❑
❑
❑
All vent runs are properly supported.  
Vent terminal is properly installed.  
Sufficient combustion air is available.  
D. Water Supply  
❑
❑
❑
❑
❑
❑
Water supply has sufficient pressure.  
❑
Maximum and minimum vent lengths are  
observed.  
Air purged from water heater and piping.  
Water connections tight and free of leaks  
Water filter is clean and in place.  
H. Electrical Wiring  
❑
❑
❑
Voltage matches rating plate.  
Materials used are as instructed in this manual.  
Water heater is properly grounded.  
Water pipes are insulated and protected from  
freezing.  
Supply cord and/or wiring meets all local codes.  
25  
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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.  
FOR YOUR SAFETY READ BEFORE OPERATING  
WARNING : If you do not follow these instructions exactly, a fire or explosion may result  
causing property damage, personal injury or loss of life.  
OPERATING INSTRUCTIONS  
1.STOP! Read the safety information above on this label.  
GAS SHUTOFF  
VALVE  
2.Turn off all electric power to the appliance.  
3.Do not attempt to light the burner by hand.  
4.Turn the Gas Shutoff Valve located on the outside of the unit  
to the "OFF" position.  
OPEN  
CLOSE  
clockwise  
5.Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Follow "B" in  
the safety information above on this label. If you don't smell gas, go to the next step.  
6.Turn the Gas Shutoff Valve located on the outside of the unit counterclockwise  
the "ON" position.  
7.Turn on all electric power to the appliance.  
to  
8.If the appliance will not operate, follow the instructions "To Turn Off Gas To Appliance"  
and call your service technician or gas supplier.  
TO TURN OFF GAS TO APPLIANCE  
Turn off all electric power to the appliance if service is to be performed.  
Turn the Gas Shutoff Valve located on the outside of the unit clockwise  
1
2
.
.
to the "OFF" position.  
26  
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Operating the water heater:  
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 lights, to avoid vapors lighting.  
Do Not turn on water heater unless water and gas  
supplies are fully opened.  
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.  
Water Temperature Setting  
The temperature of the water in the water  
scalding. Be sure to read and follow the  
warnings outlined in this manual and on  
the label located on the water heater.  
!
DANGER: There is a  
heater can be regulated by setting the  
temperature on the front of the remote  
control.  
hot water scald potential  
if the temperature is set  
too high. Households with  
small children, disabled, or  
elderly persons may require  
a 120°F (49°C) or lower  
temperature setting to  
prevent contact with HOT  
water.  
Mixing valves are available for reducing  
point of use water temperature by mixing  
hot and cold water in branch water lines.  
Contact a licensed plumber or the local  
plumbing authority for further  
Safety factors should be considered when  
selecting the water temperature setting of  
the water heater’s remote control.  
The remote control was set at 100°F  
(38°C) before the water heater was shipped  
from the factory. This is the  
information. (See page 4 for more details.)  
The chart below may be used as a guide in  
determining the proper water temperature  
for your home.  
recommended starting point.  
Water temperatures above 125°F (52°C)  
can cause severe burns or death from  
Time/Temperature Relationship in Scalds  
Water Temperature  
Time To Produce a Serious Burn  
120°F (49°C)  
125°F (52°C)  
More than 5 minutes  
11/2 to 2 minutes  
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  
Table courtesy of Shriners Burn Institute  
27  
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Water Temperature Setting…  
Maximum water temperature occurs while The hottest temperature water will be at  
the burner is on. To determine the water  
temperature, turn on a hot water faucet  
and place a thermometer in the water  
stream. Water temperature at the faucet  
may vary depending on season and length  
of pipe from the water heater.  
the hot water faucet closest to the water  
heater.  
Always remember to test the water  
temperature with your hand before use and  
remember that hotter water increases the  
risk of scald injury.  
The factory setting of the remote control  
temperature range is between  
100°F (38°C) and 120°F (49°C).  
Always supervise young children or others  
who are incapacitated.  
The water heater is equipped with a 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  
located near the back of this manual, or  
contact your dealer.  
The remote control is factory preset to  
100°F (38°C).  
To turn the remote control ON or OFF,  
press the POWER button.  
To adjust the temperature to a required  
setting , press the UP arrow temperature  
button.  
!
WARNING: Should overheating occur or  
the gas supply fail to shut off, turn off the  
manual gas control valve to the appliance.  
Pressing the UP or DOWN temperature  
adjustment buttons will change the  
temperature set point.  
If the water heater has been subjected to  
fire, flood or physical damage, turn off the  
manual gas shut-off valve(s), and do not  
operate the water heater again until it has  
been checked by qualified personnel.  
The temperature set point on the remote  
control cannot be increased above 112°F  
(44°C) when a hot water faucet is in the  
open position.  
Notice: The water heater may not operate  
with a small water flow. In such case,  
increase the water flow. If water heater still  
does not operate and hot water faucet is  
completely open, increase the temperature  
setting on the remote control.  
Notice: The remote controller  
cannot be turned on when  
water is flowing or circulating  
through the water heater.  
Notice: The factory setting allows  
operating temperatures between 100°F  
(38°C) and 120°F (49°C). Temperatures  
of up to 180°F (82°C) can be achieved  
with the MAIN (UMC-117) remote  
control and a dip switch adjustment. Only  
qualified service personnel should perform  
this adjustment. Only factory authorized  
remote control(s) should be used.  
Priority Indicator  
In Use Indicator  
(Lit during operation)  
PRIORITY  
Temperature  
Adjustment  
Buttons  
LED Display  
(Displays water  
temperature and error  
codes)  
Notice: Display shows  
°F  
°F only.  
ON/OFF  
Indicator  
POWER  
ON/OFF  
Higher (Hotter)  
Lower (Cooler)  
100 102 104 106 108 110 112 114 116 118 120* 125 130 135 140 150 160 170 180 °F  
38 39 40 41 42 43 44 46 47 48 49* 52 54 57 60 66 71 77 82 °C  
* Temperatures above 120°F (49°C) can be achieved by adjusting the  
dip switch. See page 35 for dip switch adjustment.  
28  
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Care and cleaning of the water heater:  
Routine Preventative Maintenance  
DANGER: Before  
manually operating the  
Properly maintained, your water heater  
will provide years of dependable trouble-  
free service.  
Inspect the area around the water heater to  
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.  
ensure a safe operating environment. Keep  
appliance area clear and free from  
combustible materials, gasoline, and other  
flammable vapors and liquids.  
It is recommended that a periodic  
inspection of the burner, relief valve, air  
intake filter, water filter and venting  
system should be made by service  
Ensure the unit has not been damaged. If  
damage or denting is present, contact a  
personnel qualified in gas appliance repair. service personnel to verify proper  
operation.  
It is suggested that a routine preventive  
maintenance program be established and  
followed by the user.  
Check for any abnormal sounds during  
normal operation of the water heater.  
At least once a year, lift and release the  
lever handle on the pressure relief valve,  
located in the hot outlet piping of the  
water heater, to make certain the valve  
operates freely. Allow several gallons to  
flush through the discharge line to an open  
drain.  
All piping should be checked for gas  
and/or water leaks. Refer to page 12 of  
this manual for instructions on leak  
testing.  
!
DANGER: Hotter water  
increases the potential for  
Hot Water Scalds.  
The air intake and cold water supply  
filters should be cleaned monthly. Refer to  
the “Housekeeping” section for further  
NOTICE: If the pressure relief valve on information.  
the hot water heater discharges  
periodically, this may be due to a  
problem in the water system. Contact  
the water supplier or your plumbing  
contractor on how to correct this. DO  
NOT plug the relief valve outlet.  
DO NOT operate the water heater if you  
feel something is wrong with the unit.  
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  
DO NOT allow children to operate or  
otherwise handle the unit.  
Notice: After inspection, maintenance,  
and/or cleaning, ensure proper operation  
Rapid closing of faucets or solenoid  
valves in automatic water using appliances by turning on a hot water faucet.  
can cause a banging noise heard in a water  
pipe. Strategically located risers in the  
water pipe system or water hammer  
hot water temperatures and  
other potentially hazardous  
conditions.  
arresting devices can be used to minimize  
the problem.  
Housekeeping  
Before performing Housekeeping tasks to  
this water heater, turn the unit off and  
disconnect the power supply.  
HOW TO CLEAN THE WATER FILTER:  
● Make sure the unit is OFF and the  
electrical power supply has been  
disconnected.  
!
DANGER: Shock Hazard  
Make sure the electrical  
power to the water heater is  
off to avoid potential serious  
injury or damage to  
Vacuum around the water heater for dust,  
dirt and lint on a regular basis.  
● Turn the water supply OFF to the  
heater.  
Clean the water heater and remote control  
by using a damp soft cloth with a few  
drops of mild detergent and gently wiping  
the surfaces of the unit. Wipe any  
components.  
● Drain heater. See “Draining The  
Water Heater” section on page 31.  
● Unscrew the water filter, and slide the  
remaining moisture with a dry soft cloth.  
filter out.  
To ensure sufficient ventilation and  
combustion air supply, proper clearances  
must be maintained.  
● DO NOT tap the filter as it may  
!
DANGER: Combustible  
deform and/or damage the filter.  
materials, such as clothing,  
cleaning materials, or  
● To remove severe sediment and dirt,  
use a soft brush and wash with running  
water.  
DO NOT block or obstruct the air intake  
opening located at the lower left corner of  
the water heater. A minimum of 12”  
(30 cm) is required between this  
combustion air inlet opening and any  
obstruction.  
flammable liquids, etc., must  
not be placed against or next  
to the water heater.  
● Return the filter to the water heater and  
screw in the filter.  
● Turn the electrical power supply and  
cold water supply ON to the water  
heater.  
The Air Intake and Water filters should be  
cleaned on a monthly basis.  
29  
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Care and cleaning of the water heater:  
Housekeeping continued  
CLEANING THE AIR INTAKE  
tightening the screw.  
!
DANGER: DO NOT attempt  
FILTER/AIR FILTER:  
to operate the water heater  
CLEANING THE WATER HEATER  
AND REMOTE CONTROL(S):  
without the air intake filter. DO  
NOT alter the proving switch to  
force the unit to operate without  
the air intake filter.  
● Make sure the unit is OFF and the  
electrical power supply has been  
disconnected.  
● Make sure the unit is OFF and the  
electrical power supply has been  
disconnected.  
● Unscrew the holding screw to the right  
of the filter, and slide the filter down.  
Notice: The water heater may  
not work if the air intake filter  
is severely clogged.  
● DO NOT scrub the appliance with a  
brush.  
● Using a vacuum cleaner, remove any  
loose dust particles. DO NOT tap the  
filter as it may deform and/or damage  
the filter.  
● Use only mild soapy water, other  
cleaners may damage the surface of the  
water heater.  
● To remove severe dust, use a soft brush  
● DO NOT remove any label including  
the rating plate while cleaning or  
servicing.  
and wash with running water.  
● Allow the filter to dry completely  
before reinstalling the filter on the  
water heater. Be sure to secure the filter  
by lining the guide tab in the hole and  
● DO NOT splash water on the remote  
controls when cleaning.  
Venting System Inspection  
The venting system of an indoor water  
heater should be inspected annually to  
ensure all of the vent sections are secure  
and air-tight.  
Bubbles around a joint connection  
indicates a seal leak. Refer to page 13 for  
vent sealing instructions.  
DO NOT operate the unit if vent system  
shows signs of leaking exhaust.  
It is recommended that qualified service  
personnel familiar with Category III  
venting inspect the venting system.  
Check to make sure that the air intake and  
vent outlet on the OUTDOOR water  
heater or the air intake filter and the vent  
terminal on the INDOOR water heater has  
not been blocked or contain debris.  
Check vent connection joint sections with  
a solution of soapy water to assure air-  
tightness while the unit is operating.  
Blue Flame  
Burner Inspection  
Visually inspect the main burners  
annually.  
!
CAUTION: For your safety, burner  
inspection and cleaning should be  
performed only by qualified service  
personnel.  
Through the sight glass, inspect the burner  
flame with the main burner off and inspect  
the main burner while firing.  
For cleaning, a vacuum cleaner can be  
used on the burner.  
Proper burner pattern.  
If any unusual burner operation is noted,  
the water heater should be shut off until  
qualified service assistance can be  
obtained.  
Vacation and Extended Shut-Down  
NOTICE: Refer to the Freeze  
Protection Section on page 31.  
If the water heater is to remain idle for an  
extended period of time, the power and  
water to the appliance should be turned  
off.  
After a long shut-down period, the water  
heater’s operation and controls should be  
checked by qualified service personnel.  
The water heater and piping should be  
drained if they might be subjected to  
freezing temperatures.  
30  
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Care and cleaning of the water heater:  
Draining the Water Heater  
Below are instructions for draining water  
out of the water heater.  
To put the water heater back into  
operation after draining, follow the steps  
below.  
Turn off the switch on the remote  
control.  
Reinstall the drain plug and water filter.  
Close the hot water outlet drain valve.  
PRIORITY  
Close the gas shut-off valve(s).  
°F  
POWER  
ON/OFF  
Open the water shut-off valve and close  
again after making sure that water  
comes out from hot water faucets.  
(This step is to remove air from the  
water lines.)  
Unplug the power supply cord (or  
disconnect breaker) at least 10 seconds  
after step #1.  
To Hot Water  
Faucet(s)  
Open all hot water faucets. Before  
proceeding to the next step, make sure  
that COLD water is coming out of all  
hot water faucets.  
Plug into an electrical outlet, fully open  
the gas shut-off valve and the water  
shut-off valve.  
Close the water shut-off valve.  
NOTICE: The water heater may not  
operate unless the above procedure is  
followed correctly.  
Using a suitable container to catch  
Draining the water heater  
water, remove the water filter from  
heater. Attach a garden hose to the  
drain valve installed in the hot water  
outlet line and direct the stream of  
water to a suitable drain where it will  
cause no damage. Leave water heater  
as is until next use.  
WARNING: Failure  
to follow these  
instructions while  
draining the water  
heater can cause serious  
damage to the water  
heater as well as  
personal injury  
including scalding.  
Freeze Protection  
Where the water heater may be exposed to Another method of freeze prevention is by  
WARNING: Failure  
to drain the water  
heater can cause serious  
damage to the water  
heater as well as  
running a small volume of water. Running  
water will protect the water heater, piping  
and valves.  
freezing conditions, even for a short  
period of time, be sure to drain all water  
from the unit as instructed above.  
Follow the steps below to ensure proper  
water flow through the water heater and  
piping:  
Exposure to freezing conditions can occur  
from down draft of venting system or  
from installation in areas exposed to cold  
air.  
personal injury.  
Turn off the switch on the remote  
control.  
The water heater is equipped with a Freeze  
Protection Electric Heater. As long as the  
electricity is supplied to the water heater, it  
prevents freezing inside the water heater up  
to an ambient temperature of approximately  
minus 30°F (-34°C) (without wind  
conditions)  
NOTICE: DO NOT  
unplug the electric  
power supply cord for  
freeze protection.  
Close the gas shut-off valve.  
Open the hot water faucet slightly until  
a stream of approximately 1/8” (.32 cm)  
is flowing. Be sure to check the flow  
periodically.  
This device only protects the internal  
components of the water heater. It does  
NOT protect piping and valves. Therefore,  
piping and valves should be wrapped with  
insulation material as instructed on page 24.  
31  
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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 Cause  
What To Do  
Not enough or no hot water.  
Water Shutoff valve is not fully  
opened.  
● Check shutoff valve and open fully.  
Hot water faucet is not fully opened.  
● Open how water faucet completely.  
(The main burner goes off when  
incoming water volume is  
inadequate.)  
Water piping is frozen.  
● Allow piping to thaw.  
No electricity or water supply is cut  
off.  
● Check that proper power is being  
supplied and/or water supply is  
adequate.  
Unit is not "ON".  
● Turn the unit "ON" by the button  
on the remote control.  
The temperature may be set too low.  
● Increase the temperature setting.  
Mixing Valve Malfunctions  
(if applicable)  
● Check and replace if necessary.  
Error code displayed on remote  
controller.  
● See instructions for Error Code and  
if required, contact a dealer for  
service.  
Not enough water demand.  
Water inlet filter clogged.  
Fixture aerator is clogged.  
● Increase water flow.  
● Clean water inlet filter.  
● Clean aerator.  
Scale build up in heat exchanger.  
● Check for error code. If required,  
contact a dealer for service.  
Hot and cold water lines reversed.  
The temperature may be set too low.  
● Reverse water connections.  
Water not hot enough.  
● Check and open the gas valve fully.  
The gas valve is not fully opened.  
● Call your gas company to verify  
the gas meter and gas piping size.  
Gas supply pressure is low.  
● Call dealer for service.  
Bleed over in one of the hot water  
fixtures.  
● Decrease the temperature setting.  
Water too hot.  
Temperature is set too high.  
● Check shutoff valve and open fully.  
Water shutoff valve is not fully  
opened.  
● Allow more water to flow.  
Small amount of water has been  
heated.  
● Normal operation. There is no need  
to call for service.  
Fan continues to rotate after hot water This function is to supply hot water  
faucet is closed. when the hot water faucet is reopened.  
● Normal operation. There is no  
need to call for service.  
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 electrical wiring, gas piping, remote control, burners, vent  
connectors or other safety devices. Refer repairs to qualified service personnel.  
32  
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Error Code Guide  
When an error code is displayed:  
● Close the hot water faucet, turn off the switch on the  
remote control.  
If the error code is still shown:  
● Turn off the hot water faucet and turn off the switch on  
the remote control.  
● Wait for about 5 minutes before turning the switch on  
again.  
● Take note of the error code displayed and call the  
customer service assistance number in the “If You Need  
Service” section of the manual on the back cover.  
● Open the hot water faucet.  
If the error code remains shown:  
Notice: If an error code other than those listed below is  
displayed, immediately turn off the hot water faucet, take  
note of the error code, turn off the switch on the remote  
control and call the customer assistance number.  
● Close the hot water faucet and turn off the switch on the  
remote control.  
● Take the proper action shown below and attempt  
operation of the appliance again.  
Error Code  
Possible Cause  
What To Do  
11  
12  
The Gas Shutoff Valve is not opened  
completely.  
● Open the Gas Shutoff Valve  
completely.  
Gas Service has been interrupted.  
● Contact Gas Utility Company.  
● Fill up LP Gas container or  
LP Gas is running low. (LP models only)  
replacewith a new cylinder of LP Gas.  
15  
16  
The hot water faucet is not opened enough. ● Open the faucet more to secure  
enough volume.  
The method of restarting the unit after  
draining the water from it was not performed  
in sequesnce.  
● See the section "Draining the Water  
Heater"  
21  
Air intake filter may not be attached, or may ● See the section "Cleaning the Intake  
Filter".  
Indoor Water Heater Only not be firmly in place.  
05  
Air intake of the unit and/or vent termination ● Remove any obstructions of the air  
may be blocked.  
intake or vent termination.  
(Every 60 seconds you hear  
an alarm or when the faucet is  
closed, the alarm stops.)  
Ventilator or other vents of the room may be  
blocked.  
● Clean the air intake of any dust or  
grease build up.  
The air inside the room may be  
contaminated due to long use of a fireplace  
or spaceheater.  
● Open a window or vent to keep the  
air inside the room fresh.  
Indoor Water Heater Only  
● Lower the level of the ventilation of  
Heavy ventilation by other equipment or  
appliances causing the lack of air intake to  
the water heater.  
other equipment or appliances.  
● Avoid direct contact from steam.  
Air shortage may be caused by too much  
steam in the unit.  
● Clean the air intake filter.  
Air intake filter is clogged.  
13  
If the error code is still displayed after  
● Please contact a dealer for service.  
Indoor Water Heater Only taking the above steps.  
1L  
Water heater has build up of lime deposits.  
● Contact a dealer for service.  
99  
Decrease of blower motor ventilation  
● Clean any blockage from heat  
exchanger fins and/or blower motor  
Outdoor Water Heater Only amount. (Operation Stops)  
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.  
33  
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Replacement Parts.  
Indoor Water Heater  
Instructions For Placing a Parts Order  
Address parts orders to the distributor or store  
from where the water heater was purchased.  
Part description (as noted below) and  
number of parts desired.  
WARNING: For your  
safety, DO NOT attempt to  
disassemble this unit for  
any reason.  
CAUTION: For your safety, DO  
NOT attempt repair of electrical wiring,  
gas piping, 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.  
Unit Cover Panel  
Heat Exchanger  
Thermistor  
Heat Exchanger  
Burner Assembly  
Cover  
Burner  
(w/ sight glass)  
Assembly  
(with ODS)  
Ignitor  
Flame Rod/  
Electrodes  
.
Water Flow  
Solenoid  
Proving Switch  
Blower  
Motor  
Transformer  
PC Board (PCB)  
5A (250V) Fuse  
3  
2
3
4
Inlet Thermistor  
Outlet  
Thermistor  
Gas Valve  
Assembly  
3A (250V)  
Fuses  
Water Filter  
Outdoor Water Heater  
Unit Cover Panel  
Heat Exchanger  
Thermistor  
Heat Exchanger  
Burner Assembly  
Cover  
Burner  
Assembly  
(w/ sight glass)  
Ignitor  
Flame Rod/  
Electrodes  
Water Flow  
Solenoid  
Blower  
Motor  
Transformer  
N  
PC Board (PCB)  
5A (250V) Fuse  
3  
3
Inlet Thermistor  
Outlet  
Thermistor  
Gas Valve  
Assembly  
3A (250V)  
Fuses  
Water Filter  
34  
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The content on this page is intended for use by qualified  
installation/service personnel ONLY.  
WARNING: Improper adjustment, alteration,  
!
DANGER: Hotter water increases  
service or maintenance can cause property damage,  
the potential for Hot Water SCALDS.  
personal injury, or death.  
Temperature Setting DIP Switch Adjustment  
Required adjustment for up to 180°F (82°C) water temperature settings  
Time/Temperature Relationship in Scalds  
Water Temperature  
Time To Produce a Seroius 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  
1 ½ to 2 minutes  
About 30 seconds  
About 10 seconds  
Less than 5 seconds  
Less than 3 seconds  
About 1 ½ seconds  
About 1 second  
!
WARNING: Refer to scald potential warnings on page 4 before  
making adjustment. Changing this setting is done at your own risk.  
DO NOT alter the #4 DIP Switch if the setting of up to 180°F (82°C) is  
not required.  
Follow the instructions below if it is determined that a setting of up to  
180°F (82°C) is required.  
●
●
●
Turn off remote control. Turn off the gas and water shutoff valves.  
Remove the front cover.  
155°F (68°C)  
Table courtesy of Shriners Burn Institute  
Find the DIP Switch #4 located at the top left hand side of the PCB. (See  
illustration to the right for DIP Switch location)  
ON  
2
3
4
1
●
●
●
Change the DIP Switch #4 setting to the “ON” position. DO NOT alter any  
other DIP Switch. The LED on the PCB is flashing. At the same time, the  
display of the Main Remote Control starts to flash.  
2
3
4
1
SW1  
SW2  
ON  
SW3  
1
2
3
4
1
2
3
4
Press the “Max” button on the left hand side of the PCB for more than 1  
second. The LED on the PCB starts illuminating continuously. At the same  
time, the display of the Main Remote Control is on continuously.  
Change the DIP Switch #4 setting back to the “OFF” position. DO NOT alter  
any other DIP Switch. The LED on the PCB will stop illuminating. At the  
same time, the display of the Main Remote Control will turn off.  
Location of DIP Switches on PC Board.  
ON  
●
●
●
Attach the unit’s front cover.  
4
2
3
1
Turn on the remote control, gas and water shutoff valves.  
Check and ensure safe operation and performance of the water heater.  
As set from factory  
See steps below to LIMIT maximum water temperature setting to 120 (49°C).  
Follow first four bullets points listed above, then continue as listed below:  
ON  
4
2
3
1
●
Press the “Min.” button on the left hand side of the PCB for more than 1  
second. The LED on the PCB starts illuminating continuously. At the same  
time, the display of the Main Remote Control is on continuously.  
Setting during adjustment  
to DIP Switch #4  
for temperature.  
●
Change the DIP Switch #4 setting back to the “OFF” position. DO NOT alter  
any other DIP Switch. The LED on the PCB will stop flashing. At the same  
time, the display of the Main Remote Control turn off.  
ON  
4
2
3
1
●
●
●
Attach the unit’s front cover.  
Setting after adjustment  
to DIP Switch #4  
Turn on the remote control, gas and water shutoff valves.  
“Max”  
Button  
for temperature.  
Check and ensure safe operation and  
performance of the water heater.  
LED  
SW1  
SW2  
ON  
“Min.”  
Button  
SW3  
1
2
3
4
1
2
3
4
DIP  
Switches  
35  
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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  
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 front panel 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 problem as you can best describe them.  
f. List of people, with dates, who have been contacted regarding your problem.  
36  
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