Rheem Water Heater RMTG2 53PVNPVPXNXP User Guide
Use & Care Manual  
With Installation Instructions for the Installer  
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 very important that all persons who are expected to install, operate  
or adjust this water heater read the instructions carefully so they may  
understand how to perform these operations. If you don’t understand  
these instructions or any terms within it, seek professional assistance.  
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.  
Indoor Water Heater  
Models:  
PH-16 (FISN)(FISP)  
PH20R-(IFSN)(IFSP)(OFN)(OFP)  
PTG2-42(PVN)(PVP)  
Outdoor Water Heater  
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  
PTG53-(PVN)(PVP)(XN)(XP)  
RTG2-42(PVN)(PVP)  
RTG2-53(PVN)(PVP)(XN)(XP)  
RUTG2-42(PVN)(PVP)  
RUTG-53(PVN)(PVP)(XN)(XP)  
RMTG2-42(PVN)(PVP)  
RMTG-53(PVN)(PVP)(XN)(XP)  
Information!  
!
California Proposition 65 Warning: This product contains  
chemicals known to the State of California to cause cancer, birth  
defects or other reproductive harm.  
!
WARNING: If the information in these instructions is not followed exactly,  
a fire or explosion may result, causing property damage, personal injury or death.  
!
!
FOR YOUR SAFETY!  
● If you cannot reach your gas supplier, call  
— Do not store or use gasoline or other  
flammable vapors or liquids or other  
combustible materials in the vicinity of this  
or any other appliance. To do so may result  
in an explosion or fire.  
the fire department.  
● Do not return to your home until authorized  
by the gas supplier or fire department.  
— Improper installation, adjustment,  
alteration, service or maintenance can cause  
property damage, personal injury or death.  
Refer to this manual. Installation and service  
must be performed by a qualified installer,  
service agency or the gas supplier.  
— WHAT TO DO IF YOU SMELL GAS  
● Do not try to light any appliance.  
● Do not touch any electrical switch; do not  
use any phone in your building.  
● Immediately call your gas supplier  
from a neighbor’s phone. Follow the  
gas supplier’s instructions.  
S
I
N
D
31-80176  
CERTIFIED  
AP14016-1 (04/06)  
Printed in Japan  
I
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®
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IMPORTANT SAFETY INFORMATION.  
READ ALL INSTRUCTIONS BEFORE USING.  
Be sure to read and understand the entire Use and Care Manual before attempting to install or operate this  
water heater. It may save you time and money. Pay particular attention to the Safety Instructions. Failure to  
follow these warnings could result in serious bodily injury or death. Should you have problems understanding  
the instructions in this manual, or have any questions, STOP, and get help from a qualified service technician,  
or the local gas utility.  
DANGER!  
INSTALL 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.  
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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, disabled or  
elderly persons may require a 120°F (49°C) or lower  
temperature setting to prevent contact with “HOT” water.  
Water temperature over 125°F can  
cause severe burns instantly or  
death from scalds.  
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 page 27 & 28 for more  
details.)  
Children, disabled and elderly are  
at highest risk of being scalded.  
See instruction manual before  
setting temperature at water  
heater.  
Feel water before bathing or  
showering.  
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.  
Temperature limiting valves are  
available, see manual.  
The diagram to the bottom left illustrates the Remote  
Control and how to adjust the water temperature.  
Notice: The factory setting allows operating temperatures  
between 100°F (38°C) and 120°F (49°C). Temperatures  
of up to 140°F (60°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.  
Notice:  
Display  
shows  
°F only.  
PRIORITY  
°F  
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 °F  
38 39 40 41 42 43 44 46 47 48 49* 52 54 57 60 °C  
* Temperatures above 120°F (49°C) can be achieved  
by adjusting the dip switch. See page 35 for dip  
switch adjustment.  
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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 equipment damage,  
personal injury or fire, do not connect the  
water heater to a fuel type not in  
● Leave the building immediately and make  
sure your family and pets leave also.  
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.  
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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 water heaters must be braced, anchored or strapped to resist  
falling or horizontal displacement due to earthquake motions. For 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 installing  
● Do not attempt to repair or replace any  
part of your water heater unless it is  
specifically recommended in this manual.  
All other servicing should be referred to a  
qualified technician.  
or operating the water heater.  
● Use this appliance only for its intended  
purpose as described in this Use and Care  
Manual.  
● Be sure your appliance is properly installed  
in accordance with local codes and the  
provided installation instructions.  
READ AND FOLLOW THIS SAFETY INFORMATION CAREFULLY.  
SAVE THESE INSTRUCTIONS  
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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 must be located so it is not  
subject to physical damage, for example, by  
moving vehicles, area flooding, etc.  
This water heater shown on the left is  
an outdoor model and must be mounted ● The water heater should be installed  
vertically. It must not be installed  
indoors or in a confined space.  
vertically with the water, gas and power  
connections on the underside pointing  
toward the ground.  
The water heater should be installed  
close to the most frequently used outlet  
and its position chosen with safety and  
service in mind.  
● Failure to properly install the water heater  
outdoors as outlined in this manual can  
result in unsafe operation.  
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.  
● 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.  
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 water heater where subject  
to vibrations.  
● Do not install the water heater in  
Recreational Vehicles, Mobile Homes,  
Boats and other Watercrafts.  
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, but are not  
limited to, LP gas (butane or propane),  
paint or adhesives and their thinners,  
solvents or removers.  
● 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  
flammable products and  
materials. Combustible  
and/or flammable products  
and materials should never  
be stored in the vicinity of  
this or any gas appliance.  
● 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; (24” [61 cm] from front  
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.  
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.  
!
CAUTION:  
Top: Do not install this water  
min.  
1/2 "  
min.  
1/2 "  
Protect plastic, paint or  
other items sensitive to heat  
using non-combustible  
insulation if these are  
exposed to the flue exhaust  
even though they may be  
more than 24” (61 cm) away  
from the water heater.  
heater under an overhang less  
than 36” (91 cm) from its top.  
The area under the overhang  
must be open on 3 sides.  
(1.3 cm)  
(1.3 cm)  
min. 12" (30 cm)  
(24" (61 cm) minimum is  
recommended for service)  
Front = 12" (30 cm)  
Back = 0" (with support bracket) Bottom = 12" (30 cm)  
Side = 1/2" (1.3 cm)  
7
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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  
This water heater is for INDOOR  
installation ONLY!  
● The water heater should be installed with  
the proper venting materials and termination  
suitable for Category III venting.  
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.  
● A fire stop plate should be installed at every  
penetration of a floor or ceiling if the vent is  
not running in a fire rated shaft.  
● Failure to install and properly vent the water  
heater to the outdoors as outlined  
When such areas cannot be avoided, it is  
recommended that a suitable catch pan,  
adequately drained, must be installed under  
the water heater.  
in the Venting Section of this manual  
can result in unsafe operation.  
● Long hot water lines should be insulated to  
conserve water and energy.  
The pan must not restrict combustion  
air flow.  
● The water heater and water lines should  
be protected from exposure to freezing  
temperatures.  
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.  
● Do not install the water heater in  
bathrooms, bedrooms, any occupied rooms  
normally kept closed, or in outdoor areas.  
!
WARNING: Combustible  
construction refers to  
adjacent walls and ceilings  
and should not be confused  
with combustible or  
flammable products and  
materials. Combustible  
and/or flammable products  
and materials should never  
be stored in the vicinity of  
this or any gas appliance.  
● Do not install the water heater in small,  
poorly ventilated rooms, or in airtight  
rooms with air conditioning.  
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 water heater where subject  
to vibrations.  
● Do not install the water heater in  
Recreational Vehicles, Mobile Homes,  
Boats and other Watercrafts.  
Minimum Clearance from  
Combustible and  
Non-Combustible  
Construction.  
● Do not install the water heater near vents  
for heating or cooling. A minimum of 4  
feet (1.2 m) should be maintained.  
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 "  
min.  
min. 3"  
(8 cm)  
(m8inc.m3")  
1/2 "  
● 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).  
(1.3 cm)  
(1.3 cm)  
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.  
min. 12"  
(30 cm)  
(24" (61 cm) minimum is  
recommended for service)  
Top = 12" (30 cm) Back = 0" *  
(8 cm)  
Vent = 3"  
Front = 12" (30 cm) Bottom = 12"  
(with support bracket)  
Side = 1/2" (1.3 cm)  
(30 cm)  
*
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.  
!
WARNING: Follow vent  
manufacturer’s instruction  
while installing vent. If  
required, provide additional  
clearances from vent to  
combustibles per vent  
● Maintain a minimum clearance of 3” (8 cm)  
around the vent pipe to combustible or non-  
combustible construction, unless otherwise  
specified by vent manufacturer or installed  
in an enclosed space. 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.  
● 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.  
manufacturer’s instruction.  
3” (8 cm) min  
Vent  
Pipe  
3” (8 cm)  
min  
3” (8 cm)  
min  
See the back page of this manual for  
additional requirements for the  
Commonwealth of Massachusetts.  
8
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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.  
Buildings of unusually tight construction  
shall have the combustion and ventilation  
air supplied from outdoors, or a freely  
ventilated attic or crawl space.  
Air openings  
minimum 1 in2  
(6.5 cm2) per  
1000 Btuh of  
total input  
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 cm2) per 4000 Btuh (1.2 kw) of the  
total input rating of all the appliances in  
the enclosure.  
A confined space is one having a volume  
of less than 50 cubic feet (1.4 m3) per  
1000 Btuh (0.3 kw) of the aggregate input  
of all appliances within that space.  
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.  
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 cm2) per 2000 Btuh (0.6 kw) 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).  
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  
cm2) per 1000 Btuh (0.3 kw) 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. The above  
requirements shall be used unless:  
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 grille,  
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.  
national, provincial, or local codes govern  
the requirement for these air openings.  
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 contains 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  
Information!  
WA  
WITH  
1
A
3
T
California Proposition 65 Warning: This product contains  
chemicals known to the State of California to cause cancer birth  
P
W
,
defects or other reproductive harm.  
W
ARNING: If the information in these instructions is not followed exactly,  
fire or explosion may result causing property damage, personal injury or death.  
AP13487-1 (03/05)  
!
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
S
I
N
Drain Tubing  
(Indoor models only)  
Printed in USA  
Tankless Unit  
E
IF  
I
E
®
Remote Control  
Assembly Kit  
Manual Appliance  
Gas Shut-off Valve  
9
Use & Care Manual  
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Installing the (INDOOR) water heater:  
The water heater must be installed with a 3” diameter UL approved Category III Stainless Steel appliance  
vent pipe and an appropriate adapter.  
Venting  
DANGER: Failure to  
install the appliance 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,  
The installation of venting must comply  
with national codes, local codes and the  
vent manufacturer’s instructions.  
span should be no more than five (5) feet  
(1.5 m). Support isolation hanging bands  
should be used. DO NOT use wire. (See  
diagram below).  
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.  
Notes on pre-existing vent:  
If the water heater is being installed as a  
serious injury, explosion,  
or fire. To avoid the risk  
of fire, explosion, or  
asphyxiation from carbon  
monoxide, NEVER operate  
the water heater unless it is  
properly vented and has  
adequate air supply for  
proper operation as  
All vent components (adapters, pipe, elbows,  
terminals, etc.) should be UL 1738 Certified  
Stainless Steel Venting Material  
(e.g. AL29-4C).  
The specified vent termination must be used.  
The termination should be a 90° elbow with  
screen. (Refer to pages 14 and 15 for an  
example of 90° termination)  
NO!  
YES!  
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  
joint.  
outlined in the Venting  
section of this manual.  
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.  
Follow vent manufacturer’s installation  
instructions and their recommended  
clearances to combustibles.  
The unit can be vented either horizontally  
or vertically.  
Vent pipe runs must be adequately supported  
along both horizontal and vertical runs.  
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  
WARNING: Use 3”  
UL approved Category III  
Stainless Steel vent  
material only. No other  
vent material is permitted.  
WARNING: Refer to  
page 8 for clearances to  
combustible material.  
putting the water heater into service.  
Additional installatio information for The  
Commonwealth of Massachusetts is located  
on the back page of this manual.  
The maximum recommended unsupported  
Venting Lengths  
Number of  
90° elbows  
(bends)  
Maximum  
Length of  
Straight Pipe  
MAXIMUM VENT LENGTH: The  
The vent can be installed with a slight  
downward slope of 1/4” per foot of  
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.  
system will not operate if there is excessive  
restriction (pressure drop) in the venting  
system. A maximum 34’ 6” (10.5 m) of vent  
pipe may be used provided there is only one  
90° elbow in the system. If additional elbows  
are required: two elbows can be used with 33’  
(10.0 m), three elbows can be used with 31’  
6” (9.5 m) or four elbows can be used with  
1
2
3
4
34’ 6”  
(10.5 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  
33’  
(10.0 m)  
30’  
(9.2 m) of vent pipe.  
31’ 6”  
(9.5 m)  
A 90° elbow is equivalent to 1’6” (45cm) to  
straight pipe. A 45° elbow is equivalent to 9” horizontal run. (See page 14 “Example B:  
(22 cm) of straight pipe.  
Typical Horizontal Termination w/ 1/4” per  
foot UPWARD Slope” or page 15, “Standard  
Vertical Vent Termination” for examples).  
30’ 0”  
(9.2 m)  
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.  
Vent Seam  
1/4" per foot  
downward slope  
Min. 3"  
(8 cm)  
Max. 2 feet  
(61 cm)  
Notice: Make sure that the seam of the vent  
pipe in horizontal runs is toward the top of  
the installation (see diagram to the far left).  
10  
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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 or 6” (15 cm) when installed  
vertically should be maintained between the vent pipe and combustibles  
and noncombustibles. Be sure to follow local codes and vent  
manufacturer’s installation instructions.  
1/4" per foot  
Wall Thimble  
downward slope  
Fire  
Stop  
For maintenance and inspection purposes, the following access panels are  
required.  
Vent Pipe  
● 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.  
Ceiling  
Board  
Inspection  
Access Panel #1  
Inspection  
Access  
Panel #2  
● A ventilation access panel with a 16 in2 (103 cm2) opening should  
be provided every 10 ft (3 m).  
CAUTION: Ensure that the  
appliance vent adapter is  
securely attached to the  
water heater collar.  
Appliance Vent Adapter  
The water heater must be installed  
with a UL 1738 approved Category III  
Stainless Steel appliance vent adapter.  
● Slide adapter end “A” down over heater  
collar “B” as far as it will go.  
● Tighten the clamp around the collar.  
Exhaust  
Flow  
Read the following instructions before  
installation.  
● 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.  
● Test fit the adapter over the water heater  
collar before proceeding. Adjust clamp as  
needed.  
Appliance  
Vent Adapter  
Clamp  
A
B
● Ensure that the clamp does not interfere  
with the damper shaft.  
● With an alcohol wipe, clean inside surface  
“A” of adapter and outside surface “B” of  
heater collar.  
High Temp.  
Sealant  
Collar  
NOTICE: Follow the appliance vent adapter  
manufacturer’s instructions.  
● Apply 1/4” (6 mm) wide bead of high  
temperature silicone (500°F [260°C])  
around outside of heater collar “B”.  
Water Heater  
Draining the Condensate  
CAUTION: Condensate  
is known to be acidic; refer  
to local, state (provincial)  
or federal codes for proper  
handling and discharge  
methods.  
Provision should be made to collect and  
When a water heater is vented vertically, an  
UPWARD slope must always be used. A  
condensate trap must be installed in the  
horizontal section of the vent and as close  
as practical to the water heater in order to  
prevent condensate from draining back into  
the water heater. See the diagram on page 15  
showing UPWARD slope for vertically  
vented water heaters.  
dispose of condensate from venting systems.  
When a water heater is vented horizontally,  
the vent pipe can have a DOWNWARD or  
UPWARD slope towards the termination. If  
an UPWARD slope is used, a condensate trap  
must be installed as close as practical to the  
water heater in order to prevent condensate  
from draining back into the water heater. See  
Examples A and B on page 14 for  
CAUTION: Condensate  
must drain away from the  
water heater and should  
not be allowed to drain  
back into any part of the  
vent system.  
Always attach a drain hose to the drain fitting  
and plumb the hose to a sanitary sewer drain.  
DOWNWARD and UPWARD slope for  
horizontally vented water heaters.  
A high temperature silicone tubing suitable for  
use with acidic condensate and appropriate for  
the temperature range should be used.  
WARNING: Failure to  
provide a vent condensate  
drain close to the appliance  
could allow acidic flue gas  
condensate to enter into  
appliance flueways, causing  
premature failure of the  
appliance.  
The drain tube is fashioned into a “pigtail” trap  
and must be filled with water to prevent flue  
gases from emitting into the building prior to  
operating the appliance.  
11  
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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
2
Canadian Installations  
US Installations  
US Installations  
Indoor and Outdoor  
Indoor  
Outdoor  
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.  
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), 9 inches (23 cm)  
for appliances > 10,000 Btuh (3kW)  
and < 50,000 Btuh (15kW), 12 inches  
(30 cm) for appliances > 50,000 Btuh  
(15kW).  
6 inches (15 cm) for appliances < 10,000  
Btuh (3 kW), 12 inches (30 cm) for  
appliances > 10,000 Btuh (3kW) and <  
100,000 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.  
*
E= Clearance to unventilated soffit.  
F= Clearance to outside corner.  
*
*
*
*
*
*
*
*
*
G= Clearance to corner.  
H = Clearance to each side of center  
line extended meter/regulator  
assembly. above  
3 feet (91 cm) within a height 15 feet  
(4.57 m) above the meter/regulator  
assembly.  
*
*
*
*
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.  
6 inches (15 cm) for appliances <  
10,000 Btuh (3 kW), 12 inches (30 cm)  
for appliances > 10,000 Btuh (3kW)  
and < 100,000 Btuh (30kW), 36 inches  
(91 cm) for appliances > 100,000 Btuh  
(30kW).  
6 inches (15 cm) for appliances < 10,000  
Btuh (3 kW), 9 inches (23 cm) for  
appliances > 10,000 Btuh (3kW) and <  
50,000 Btuh (15kW), 12 inches (30 cm)  
for appliances > 50,000 Btuh (15kW).  
4 feet (1.2 m) below or to side of  
opening; 1 foot (300 mm) above  
opening.  
3 feet (91 cm) above if within 10 feet  
(3 m) horizontally.  
3 feet (91 cm) above if within 10 feet  
(3 m) horizontally.  
K = Clearance to mechanical air  
supply inlet.  
6 feet (1.83 m)  
L = Clearance above paved sidewalk  
or paved driveway located on  
public property.  
Not Allowed  
Not Allowed  
Not Allowed  
Not Allowed  
Not Allowed  
Not Allowed  
M = Clearance under veranda, porch,  
deck or balcony.  
*
If clearances are not specified, then follow local installation codes and the requirement of the gas supplier.  
** For condensing appliances: The vent for this appliance shall not terminate over public walkways, near soffit vents, crawl space vents, or other  
areas where condensate or vapor could create a nuisance, hazard or cause property damage, or where condensate or vapor could cause damage  
or could be detrimental to the operation of regulators, relief valves or other equipment.  
12  
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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)  
6'  
To help prevent water lines from freezing, do not locate vent  
terminal on the side of a building with prevailing winter winds.  
If soffit vent is too close,  
block off and install new  
vent at another location  
6' (1.8 m)  
caulk zone or  
to edge of  
Inside  
corner  
Do NOT locate vent terminal too close to shrubbery, as flue gases  
may damage them.  
window etc., starting  
within 6' (1.8 m)  
6' (1.8 m) caulk  
zone  
Caulk all cracks, seams and joints within six (6) feet (1.8 m) of vent  
terminal.  
Caulk  
Caulk  
Caulk around thimble face plate for weather tight seal.  
All painted surfaces should be primed to lessen the chance of  
physical damage. Painted surfaces will require maintenance.  
4'  
12” (30 cm)  
(1.2 m)  
Insulate vent pipe of water heaters exposed to cold conditions  
(attics, crawl spaces, etc.) with inflammable material to help prevent  
moisture from accumulating in vent pipe. The insulation should be  
rated for the temperature and should not contain substances that  
corrode the vent pipe.  
Indoor Water Heater  
Caulk  
Do NOT extend exposed vent pipe of indoor water heaters outside of  
building.  
Rising moisture will  
collect under eaves.  
Guard vent against accidental contact with people and pets.  
If soffit vent is too close,  
block off and install new  
vent at another location.  
Install outdoor water heater such that air inlet and flue outlet is  
above anticipated snow level.  
6’  
(1.8 m)  
Inside  
Corner  
Caulk  
6’ (1.8 m)  
Caulk  
zone or to edge of window  
etc.,starting within 6’ (1.8 m).  
6’ (1.8 m)  
Caulk Zone  
Caulk  
RTV silicone caulk  
Wall thimble face plate  
4’  
(1.2 m)  
12”(30 cm)  
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 on 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.  
13  
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Installing the (INDOOR) water heater:  
Vent Horizontal Wall Thimble Installation  
Outer Thimble  
Section  
Inner Thimble  
Section  
An approved 3“ (7.6 cm) Vent Horizontal  
Wall Thimble must be used.  
sheathing is particle board or other  
composite material. Use four (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.  
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.  
Side View  
INSTALLATION PROCEDURE: Prepare  
an opening for the Wall Thimble in the wall.  
The opening must be 6-1/2” (16 cm) in  
diameter for a 3” (7.6 cm) vent system.  
Inner Wall  
● Attach a Rheem approved 3” (7.6 cm)  
screened, 90° elbow termination to the  
female end of a vent section or slip  
connector. Use the method described in the  
Venting installation instructions provided  
with the vent. Slide the vent in through the  
outside of the Thimble and seal the annular  
space with a thick bead of caulk.  
Outer Thimble  
Section  
Inner Thimble  
Section  
90û Elbow  
Vent  
Pipe  
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.  
90û termination  
with screen  
Outer  
Wall  
Appliance  
Vent Adapter  
Caulk for  
weather seal  
● 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.  
Wa t e r  
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 galvanized pipe up  
to 6” (15 cm) long.  
● Secure the Wall Thimble to the interior  
sheathing using suitable fasteners.  
Mounting  
Brackets  
Side View  
● 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  
provided with the vent.  
Side View  
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.  
● 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.  
● Proper support must be provided for the  
vent pipes as mentioned in the venting  
section.  
● 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 more caulking.  
● Support method used should isolate the  
vent pipe from floor joist or other structural  
members to help prevent the transmission  
of noise and vibration.  
CAUTION: Follow the  
vent manufacturer’s  
installation instructions as  
design might vary from  
manufacturer to  
● Do not support, pin or otherwise secure the  
venting system in a way that restricts the  
normal thermal expansion and contraction  
of the chosen venting material.  
manufacturer.  
Use four (4) hollow wall anchors, at least  
1/8” (.32 cm) in diameter and of appropriate  
length for the thickness of the sheathing, if  
1/4" per foot downward slope  
3" (8 cm) Clearance  
1/4" per foot upward slope  
3" (8 cm)  
Clearance  
2'  
(61 cm)  
2'  
Support  
Hanger  
Support  
Hanger  
(61 cm)  
Max  
Max  
Condensate Trap  
To Drain. Dispose of  
Vent  
Vent  
condensate in accordance  
with local codes  
Adapter  
Adapter  
Example A: Typical Horizontal Termination  
w/ 1/4” per foot DOWNWARD Slope  
Example B: Typical Horizontal Termination  
w/ 1/4” per foot UPWARD Slope  
14  
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Vertical Vent Termination Location  
The location of the vent terminal depends on the following  
minimum clearances and considerations (see diagram at left):  
Small (6” min) (15 cm)  
section of vent  
Elbow  
Minimum twelve (12) inches (30 cm) above roof.2  
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 1  
Four (4) feet (1.2 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.3  
Max. 24" (60 cm)  
Above Roof (Without  
Additional Support)  
1 Min. 18" (46 cm) Above Roof for installations in Canada.  
2 For installations in Canada 18" (45.7 cm)  
3 For installations in Canada 6' (1.8 m)  
Vertical Vent Installation  
A fire stop plate should be installed at every  
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 diagram above for  
Notice: Only Rheem  
approved termination  
and parts should be used  
during installation.  
penetration of a floor or ceiling if the vent is  
not running in a fire-rated shaft. Maintain the  
recommended air space clearance to  
combustible materials and building insulation. proper vent terminal height. Connect vent  
elbow onto vertical pipe through roof.  
Connect short piece of vent pipe  
(approximately 6” long [15 cm]) to  
elbow, and the terminal elbow with the  
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 installation to the  
Notice: Follow vent  
manufacturer’s installation  
instructions and their  
recommended clearances to  
combustibles as required.  
protective screen.  
water heater’s vent connector fitting on the  
water heater vent collar outlet. Support  
vertical or horizontal runs as previously  
mentioned. If required, use silicone sealant  
at the point the vent connector joins the  
water heater.  
The vent roof system must terminate at least  
1 foot (30 cm) above the roof line and at least  
2 feet (61 cm) higher than any portion of the  
building within 10 feet (3 m).  
Install supports every 5 feet (1.5 m) vertically  
along the vent pipe route. Vertical supports  
are required after every transition to vertical  
and are required after  
every offset elbow.  
When the vent is free-  
standing and penetrates  
a roof/ceiling, another  
means of support must  
be used at a second  
location.  
Rain Cap  
Storm  
Collar  
Storm  
Collar  
Adjustable  
Roof  
Adjustable  
Flashing  
Roof Flashing  
Roof Jack  
Vent Pipe  
Vent Pipe  
Support  
Clamp  
Support  
Clamp  
Firestop  
Firestop  
Chase Requires  
6" (15 cm) Clearance  
to Combustibles  
Follow the vent  
manufacturer’s  
recommended  
Chase Requires  
6" (15 cm) Clearance  
to Combustibles  
installation instructions  
provided with the vent  
purchased from the  
manufacturer.  
1/4" per foot upward slope  
1/4" per foot upward slope  
3" (8 cm) Clearance  
3" (8 cm) Clearance  
Firestop  
Firestop  
2'  
2'  
Support  
Hanger  
Support  
Hanger  
Condensate  
Trap  
(61 cm)  
Max  
(61 cm)  
Max  
Condensate  
Trap  
To Drain. Dispose of  
condensate in accordance  
to local codes  
To Drain. Dispose of  
condensate in accordance  
with local codes  
Vent  
Adapter  
Vent  
Adapter  
Alternate Vertical Vent Termination  
with Rain Cap  
Standard Vertical Vent Termination  
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Installing the water heater:  
Mounting the Water Heater  
Make sure the location of the appliance allows Using a wood screw and a washer, affix the  
CAUTION:  
for easy access and operation.  
lower bracket to the wall (Left and Right).  
Repeat to affix the top bracket.  
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 1-1/2” (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  
drywall anchors or lag bolts.  
1/8" (.32 cm)  
Clearance  
Wood  
Screw  
Upper Bracket  
Washer  
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.)  
TOP  
Adjustment Screws  
Bracket  
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.  
Wood  
Screw  
Lower Bracket  
Adjustment Screws  
BOTTOM  
Bracket  
Thermal Expansion  
A thermal expansion tank will be required if  
the water heater is installed in a closed loop  
system to prevent damage to heater, related  
piping and relief valve. Replacing the relief  
valve will not correct the problem! The  
condition and eliminating the repeated  
operation of the relief valve. Other methods of  
controlling thermal expansion are also  
available. Contact your installing contractor,  
water supplier or plumbing inspector for  
expansion tank is designed with an air cushion additional information regarding this subject.  
built in that compresses as the system pressure  
increases, thereby relieving the over pressure  
IMPORTANT: Do not  
Water Supply Connections  
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  
Plumbing should be carried out by a qualified  
plumber in accordance with local codes.  
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]).  
Use approved plumbing materials only.  
The diameter of the pipe lines should be a  
minimum of 3/4”.  
heater. Any heat applied to  
the water supply fittings  
will permanently damage  
the internal components  
of the water heater.  
● To supply hot water to upper floors,  
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).  
To conserve energy and to prevent freezing,  
insulate both cold and hot water supply  
lines. DO NOT cover the drain or pressure  
relief valve.  
To ensure proper operation of the water  
heater, the following water pressure guidelines  
should be followed:  
● Well water systems should be set to ensure  
a minimum system pressure of 40 psi (276  
kPa). The pressure should remain stable  
during the operation of the water heater.  
● 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).  
● 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.  
● A water pressure of 40 psi (276 kPa) is  
required to achieve maximum flow rate.  
● To maintain proper performance, ensure  
sufficient water supply pressure. The  
16  
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Water Supply Connections, continued  
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.  
Be sure to connect the water inlet and the  
CAUTION: This water  
heater must only be used with  
the following water supply  
system conditions:  
hot water outlet as shown on the water  
heater. If reversed, the water heater will  
not function.  
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.  
● With clean, potable water  
free of corrosive chemicals,  
sand, dirt or other  
Notice: If using mixing valves on the  
outlet, choose one that prevents cold water  
pressure from overcoming hot water line  
pressure.  
contaminates.  
● With inlet water  
temperatures above 32°F  
(0°C), but not exceeding  
120°F (49°C).  
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.  
Install a Check Valve between the water  
heater and the water shutoff valve (see the  
top left diagram).  
The following should be addressed in  
regards to the HOT WATER OUTLET:  
● Free of lime and scale  
deposits.  
● Connections between the water heater  
and point(s) of use should be as short  
and direct as possible.  
● DO NOT reverse the hot  
and cold water connections.  
The water heater will  
not operate.  
Alternate Water Piping Arrangement  
with Optional Valve Kit  
Valve kits may be purchased and installed as  
optional items. Contact your distributor or  
place of purchase for details.They allow for  
one person full diagnostic testing and ease  
of flushing the system. The kit includes two  
full port isolation valves, one for the cold  
side and one for the hot side. Refer to  
page 23.  
● DO NOT use lead or plastic pipe.  
● To conserve energy and minimize heat  
loss, insulation of hot water piping is  
recommended (see Hot and Cold Pipe  
Insulation Installation on page 24).  
Water Filter  
Clean the  
Notice: The flow rate of hot water may  
vary when more than two faucets  
(appliances, fixtures, etc.) are being used  
simultaneously.  
Water Filter  
Water Inlet  
Install a shutoff valve near the inlet of the  
water heater for service and draining  
purposes.  
Check Valve  
Nipple  
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 at the left).  
It is not recommended to use pipes with  
smaller diameters than the water supply  
connection of the water heater.  
Water  
Notice: Use only teflon tape on cold  
and hot water connections and  
lines.  
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.  
This appliance is not  
intended for space heating  
application. Do not  
connect this heater to  
waterlines previously  
used for space heating  
or non-potable water  
distribution. All water  
piping and components  
shall be suitable for  
potable water.  
17  
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Installing the water heater:  
Relief Valve  
A new pressure relief valve, complying  
● 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.  
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.  
Drain Valve  
shown on  
right without  
tubing (barb  
fitting on  
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.  
indoor models  
only)  
For safe operation of the water heater, be  
sure that:  
Drain  
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.  
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.  
Pressure  
Relief  
Valve  
● The BTUH rating of the relief valve must  
equal or exceed the BTUH input of the  
water heater as marked on its rating plate.  
Union  
● No valve of any type should be installed  
between the relief valve and the water  
heater  
Water  
Shutoff  
Valve  
Notice: If the relief valve on the system  
discharges periodically, a problem exists and  
service to the water system is required.  
● 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.  
Relief  
Valve  
Hot Water  
Supply  
The vinyl tubing as shown is supplied only  
with indoor water heaters and connects to the  
drain valve located at the hot water outlet as  
shown in the diagram at left. Route the other  
end of the vinyl tubing to the drain pan or a  
suitable drain where leakage from the heater  
will not result in damage to the area adjacent  
to the heater or to lower floors of the structure.  
Drain  
Tube to  
suitable  
drain  
(indoor  
models  
only)  
Discharge  
Line  
Cold  
Water  
Supply  
Inlet  
Outlet  
● Hot and cold water lines should be  
insulated up to the water heater. Refer  
to page 24 for details.  
Notice: The above illustrates a  
pressure-only relief valve. If local  
codes require a combination  
temperature and pressure relief  
valve be installed, an extension  
piece may be needed to ensure that  
the valve probe is not directly in  
the flow path of the water.  
● 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.  
18  
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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  
Do not use excessive force (over 31.5 ft lbs.  
Valve must be installed at the gas connection of [42.7 Nm]) in tightening the pipe, particularly if  
the water heater at the time of installation (see  
diagram to the left).  
teflon pipe compound is used, as the unit may  
be damaged.  
Manual  
Gas  
Supply  
Line  
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.  
Shutoff  
(Valve)  
A ground joint union or ANSI design certified  
semi-rigid or flexible gas appliance connector  
should be installed in the gas line close to the  
water heater. The National Fuel Gas Code  
(NFGC) ANSI Z223.1 and CAN B149 code  
mandates a manual gas shut-off valve: See  
NFGC & B149 for complete instructions.  
Manual Gas  
Appliance  
Shutoff  
(Supplied)  
Union  
NOTICE: To ensure proper operation of the  
heater the gas pipe and gas meter must be  
sized correctly.  
If flexible connectors are used, the maximum  
length shall not exceed 36” (91 cm).  
Gas piping shall be in accordance with local,  
utility company requirement 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 Natural Gas and  
Propane installation code.  
Sediment Trap  
Cap  
If lever type gas shut offs are used, they shall be  
T-Handle type.  
Compound used on the threaded joints of the  
gas piping must be of the type resistant to the  
action of LP gas. Use compound sparingly on  
male threads only.  
A sediment trap should be installed at the  
bottom of the gas line.  
Leak Testing  
The water heater and its gas connections must  
be leak tested at normal operating pressures  
before it is placed in operation.  
WARNING: Never use  
an open flame to test for  
gas leaks, as property  
damage, personal injury,  
or death could result.  
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 1/2 psi (14” w.c. [3.5 kPa]).  
maximum supply pressure.  
DO NOT use an industrial  
type gas regulator.  
High Altitude  
This water heater is certified for installations up to 3,280  
feet (1000 m) above sea level. The 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 listed on the rating label.  
NOTICE: For installations above 3,280 feet (1,000 m)  
elevation, the Altitude Chip on the PC board must be  
replaced. Do not install this water heater at elevations  
above 3,280 feet (1,000 m) without installing the  
proper Altitude Chip. Please contact your installer,  
local gas supplier, place of purchase or the Customer  
Service phone number as listed in this Use & Care  
Manual for more information.  
NOTICE: Select High Altitude models are available.  
One model is available for use at elevations above  
3,280 feet (1,000 m) up to 6,560 feet (2,000 m), and  
an additional model is available for use at elevations  
above 6,560 feet (2,000 m) up to 9,840 feet (3,000 m).  
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  
One (1) remote control is provided with the  
water heater. Additional remote controls may  
be purchased separately. Up to three (3) remote  
controls can be used with this water heater.  
may be subjected to oil and/or steam  
from cooking.  
NOTICE: The provided  
remote control will allow  
a maximum temperature  
setting of 120°F (49°C).  
Temperatures of up to  
140°F (60°C) can be  
achieved with dip switch  
adjustment. Only qualified  
service personnel should  
perform this adjustment.  
● Avoid areas where chemical agents (such  
as thinner, benzine and alkalines) are used.  
The following are considerations for  
determining the location of the remote  
control(s):  
● Avoid areas of direct sunlight.  
● The MAXIMUM distance between the  
water heater and the remote control  
installation location is limited to 195 feet  
(59 m) of wire.  
● DO NOT install any remote control  
outdoors or in areas where it can come in  
contact with water.  
NOTICE: Only one of each type of remote  
controls can connect to the water heater.  
Therefore, a maximum of three controls  
can connect to the water heater.  
●
●
Place remote control out of children’s reach.  
The remote control can be installed in  
convenient locations such as the kitchen,  
laundry room, utility room, or directly beside  
the indoor water heater.  
NOTICE: An optional cable  
™
(EZ Link Cable ) can be  
No other manufacturer’s controls are  
suitable for use with this water heater.  
purchased separately to  
manifold two heaters  
together.  
● Avoid areas where the remote control may  
be exposed to heat, e.g. ranges or heaters.  
DO NOT attempt to disassemble the  
remote control.  
● Avoid areas where the remote control  
Remote  
Control  
Model  
Remote  
Control  
Description  
Temperature  
Set Point  
Range  
Availability  
Base Plate  
Number  
MAIN  
Control  
100°F–120°F  
(38°C)–(49°C)  
Optional (Sold  
Separately)  
USC1-117  
USC2-117  
BATH 1  
PRIORITY  
100°F–120°F  
(38°C)–(49°C)  
Optional (Sold  
Separately)  
BATH 2  
MAIN  
°F  
P
O
W
ER  
ON/OF  
F
100°F–120°F  
(38°C)–(49°C)  
Mounting Screw x 2  
Factory Default  
Control screw  
UMC-117  
125°F–140°F  
(52°C)–(60°C)  
With Dip Switch  
Adjustment  
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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  
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 1-1/2” (3.8 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 heater.  
Do Not apply sealant to the  
remote control cable.  
● Insert the remote control extension cable  
through 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.  
● Feed the remote control extension cable  
through the central hole 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  
diagram to the left.  
● Fix the base plate to the wall using  
suitable screws and wall anchors.  
Ensure the projections on the base  
plate are pointing upward.  
Remote Control  
Connection Terminals  
PCB  
NOTICE: The remote control wire  
connection terminals are not polarity  
sensitive.  
● Connect the remote control cables to the  
extension cable from the water heater.  
● Firmly tighten the terminal screws.  
● Place the remote control over the  
base plate. Ensure the projections in  
the base plate fit into the housings in  
the remote control.  
● Secure the remote control extension cable  
using the appropriate clamp.  
● 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.  
Ground  
Clamp  
18 AWG  
Projections  
Extension  
Cable  
Gas Valve  
Remote  
Control  
Extension  
Cable  
Wall  
Penetration  
Suitable  
Wall Anchors  
Control  
Screw  
Base Plate  
Screws  
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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.  
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  
breaker. Failure to do so  
could result in severe  
personal injury or death.  
● 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 ● The water heater requires 120 VAC/60Hz and  
power supply cord (INDOOR MODELS  
ONLY). Use only a power outlet with a  
ground terminal.  
should be properly grounded.  
● 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  
● Keep any excess of the power supply cord  
servicing controls. Wiring  
errors can cause improper  
and dangerous operation.  
Verify correct operation  
after servicing.  
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 (outdoor models only) or in the  
enclosure (indoor models only) for  
a grounding connection.  
● Connect the live wire to black leg wire and  
the neutral wire to the white neutral wire.  
WATERVOLUME  
CONTROL MOTOR  
WIRING DIAGRAM  
SW1  
SW2  
COLOUR CODE  
R:RED  
W:WHITE  
BR:BROWN  
BK:BLACK  
B:BLUE  
MAIN  
BAT H  
BATH  
LIMITER  
MOTOR  
REMOTE  
CONTROL  
(UMC-117)  
REMOTE  
REMOTE  
ON  
SW3  
1
2
3
4
CONTROL1  
(USC1-117)  
CONTROL2  
(USC2-117)  
1
2
3
4
SW1  
SW2  
BK  
R
GR  
Y
B
O
W
BR  
MAX  
MIN  
USUALLY  
DISCONNECTED  
BUTTON  
FAN  
BUTTON  
8
B
FM  
5
GY:GRAY  
MOTOR  
SW3  
ON  
GR:GREEN  
O:ORANGE  
Y:YELLOW  
G/Y:GREEN/YELLOW  
8
BK  
7
6
5
4
3
2
1
R
GR  
Y
A
ADJUSTER  
BUTTON  
D
E
OFF  
R
6
5
4
3
2
1
W
F
USUALLY  
DISCON-  
NECTED  
1
2
3
4
DIP SWITCH  
B
B
R
O
Y
BK  
W
Y
G
O
BWR  
FOR  
DIRECT-VENT  
MODEL ONLY  
B
LED  
P
W
R
FLAME ROD1  
FLAME ROD2  
M
L
CONNECTOR FOR CHECKING  
THERMOELECTROMOTIVE FORCE  
2
2
7
6
5
4
3
2
1
B
W
Y
U
1
1
GR  
WATER BY-PASS  
WV  
3
2
1
Q
R
OVER HEAT  
LIMITER  
SOLENOID VALVE  
W
W
GR  
2
BK  
H
3 6  
IGNITER  
1
BK  
R
ELECTRODE  
R
2
1
5
4
GY  
GY  
FOR INDOO,R  
DIRECT-VENT  
WATER  
FLOW  
IG  
BK  
Junction Box  
(Outdoor  
models only)  
BK  
BR  
S
MODEL ONLY  
R
SENSOR  
4
5
6
1
2
3
R
Y
W
CIRCUIT  
FUSE(3A)  
W
BK  
W
BOARD  
BK  
G/Y  
W
G/Y  
BK  
W
BK  
I
J
FUSE  
(5A)  
K
W
GND  
AC  
GND  
120V  
R
W
BK BK  
BK  
BK  
(RED)W  
BK  
R3  
BK  
BK  
W
W
+
PSV  
-
R2  
R1  
R4  
W
SV2  
SV1  
SV0  
W
W
(RED)W  
ANTI-FROST  
HEATER  
W
W
W
THE CONNECTORS OF DUAL AND MULTIPLE  
ARE INTERAPPLICABLE TOTHE BODY  
CONNECTORS EACH OTHER.(RED)  
FOR INDOOR,  
DIRECT-VENT  
MODEL ONLY  
FOR  
DIRECT-VENT  
MODEL ONLY  
31-80469 0  
22  
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Installing the water heater:  
Typical Installation of Water Heater  
(Venting Required for Indoor Models Only)  
1/4" Per Foot Downward Pitch  
90û Elbow  
Vent Adapter  
Manual  
Gas Supply Line  
Shut-off  
Manual  
Gas Supply Line  
Shut-off  
To Hot Water  
Faucet(s)  
Valve  
Power  
Supply  
Cord  
To Hot Water  
Faucet(s)  
Va l v e  
Water Filter  
Drain Valve  
Manual Gas  
Appliance  
Manual Gas  
Appliance  
Water Filter  
Drain Valve  
Shut-off  
Shut-off  
(supplied)  
Check  
Valve  
(supplied)  
Check  
Valve  
On/Off  
Switch  
Union  
Union  
Relief  
Va l v e  
Union  
Relief  
Valve  
Union  
Sediment  
Trap  
Sediment  
Trap  
Drain Valve  
Drain Valve  
Cap  
Cap  
Discharge  
Discharge  
Line  
Line  
(To Suitable Drain)  
Cold Water  
Supply  
Shut-off  
Valve  
(To Suitable Drain)  
Cold Water  
Supply  
Shut-off  
Valve  
6" (15 cm) Air Gap  
6" (15 cm) Air Gap  
Drain  
Drain  
Hose  
Hose  
(To Suitable Drain)  
(To Suitable Drain)  
Indoor Models  
Outdoor Models  
Alternate Water Piping Arrangement  
with Optional Valve Kit  
Hot Water Service  
Valve  
Vacuum Relief Valve  
(Not Supplied)  
PRIORITY  
Cold Water  
¥
F
Service Valve  
POWER  
ON/OFF  
Pressure Relief  
Valve  
Remote  
Control  
If required, install per local codes  
and valve manufacturer’s  
instructions.  
Drain  
Water  
Outlet  
Water Inlet  
Install indoors only.  
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.  
23  
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Installing the water heater:  
Insulation Blankets  
Insulation blankets, available to the general  
public for external use on gas water heaters,  
are not necessary. The purpose of an  
insulation blanket is to reduce the standby  
heat loss encountered with storage tank  
heaters. This water heater does not store water  
making an insulation blanket unnecessary.  
The manufacturer disclaims any responsibility  
for such loss or injury resulting from the use  
of such unauthorized devices.  
WARNING: If local  
codes require external  
application of insulation  
blanket kits the  
CAUTION: If local codes require the  
application of an external insulation  
blanket to this water heater, pay careful  
attention to the following so as not to  
restrict the proper function and operation  
of the water heater:  
manufacturer’s  
instructions included  
with the kit must be  
carefully followed.  
The manufacturer’s warranty does not cover  
any damage or defect caused by installation,  
attachment or use of any type of energy  
saving or other unapproved devices (other  
than those authorized by the manufacturer)  
into, onto or in conjunction with the water  
heater. The use of unauthorized energy saving  
devices may shorten the life of the water  
heater and may endanger life and property.  
● Do not cover the 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.  
Hot and Cold Pipe Insulation Installation  
NOTICE: The hot and cold  
pipes should be insulated as  
shown to provide additional  
freeze protection.  
Drain Valve  
Cold Water  
Hot Water Service  
Valve  
Service Valve  
WARNING: In case the  
pipe insulation is not rated  
for the appropriate  
weather conditions install  
electric heat tracing or  
equivalent to prevent  
Pressure Relief  
Valve  
Pipe Insulation  
Water Inlet  
freezing of the pipes. Do  
not insulate or block drain  
valve on the hot outlet  
fitting. If the pipes are  
allowed to freeze, the water  
heater and the pipes may  
malfunction or leak due to  
freezing water.  
For increased energy efficiency, use pipe  
insulation. Please install the insulation  
according to the diagram 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  
❑ Do contact local gas company to ensure gas  
meter and gas piping are adequately sized.  
❑ Do follow all installation instructions  
covered in this manual.  
❑ Do use teflon tape on water line  
connections and fittings.  
❑ Do check inlet gas pressure to ensure  
that it is within the range specified on  
the rating plate.  
❑ 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).  
❑ Do maintain proper clearances to  
combustibles and non-combustibles as  
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).  
Don’ts  
❑ Don’t block or restrict Air Intake  
Opening located on the front cover  
of the water heater.  
❑ Don’t remove the front cover unless  
absolutely necessary. This should only be  
done after being examined by a qualified  
service technician.  
❑ Don’t install this product where standing  
water may occur.  
❑ Don’t use pipe dope on water line  
connections and fittings.  
24  
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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.  
Gas line equipped with shut-off valve, union and  
sediment trap.  
B. Indoor Water Heater Location  
❑
❑
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.  
Sufficient fresh air supply for proper operation of  
water heater.  
F. Relief Valve  
❑
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.  
❑
❑
❑
Provisions made to protect area from water damage.  
Sufficient room to service heater.  
G. Venting (Indoor Water Heaters Only)  
❑
Vent pipe material should be category III and meet  
UL1738 in US and ULC S636 in Canada.  
Combustible materials, such as clothing, cleaning  
materials, rags, etc. clear of the heater and  
vent piping.  
❑
Vent connector(s) pitched (1/4” per foot of length  
minimum) DOWNWARD or UPWARD to  
termination. If UPWARD, a condensate trap must be  
installed close to the heater. See page 14.  
❑
Water heater is properly attached to the wall.  
D. Water Supply  
❑
Vent connector(s) securely fastened together with  
high temperature silicone (500°F [260°C]) and  
air-tight.  
❑
❑
❑
❑
❑
❑
Water supply has sufficient pressure.  
Air purged from water heater and piping.  
Water connections tight and free of leaks.  
Water filter is clean and in place.  
❑
❑
❑
❑
All vent runs are properly supported.  
Vent terminal is properly installed.  
Materials used are as instructed in this manual.  
Sufficient combustion air is available.  
Maximum and minimum vent lengths are observed.  
Water pipes are insulated and protected from  
freezing.  
H. Electrical Wiring  
❑
❑
❑
Voltage matches rating plate.  
Water heater is properly grounded.  
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 overheating, 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  
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 hot  
heater can be regulated by setting the  
temperature on the front of the remote  
control.  
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 information.  
(See page 4 for more details.)  
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 recommended starting  
point.  
The chart below may be used as a guide in  
determining the proper water temperature  
for your home.  
Water temperatures above 125°F (52°C) can  
cause severe burns or death from scalding.  
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)  
About 30 seconds  
About 10 seconds  
Less than 5 seconds  
Less than 3 seconds  
About 11/2 seconds  
About 1 second  
135°F (57°C)  
140°F (60°C)  
145°F (63°C)  
150°F (66°C)  
155°F (68°C)  
Table courtesy of Shriners Burn Institute  
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Water Temperature Setting…  
Maximum water temperature occurs while  
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 hottest temperature water will be at 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.  
Always supervise young children or others  
who are incapacitated.  
The factory setting of the remote control  
temperature range is between 100°F (38°C)  
and 120°F (49°C).  
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, physical damage, or has been under  
water, 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 factory setting allows operating  
temperatures between 100°F (38°C) and  
120°F (49°C). Temperatures of up to 140°F  
(60°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.  
Notice: The remote control  
cannot be turned on when  
water is flowing or circulating  
through the water heater.  
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.  
Priority Indicator  
In Use Indicator  
(Lit during operation)  
PRIORITY  
Temperature  
Adjustment  
Buttons  
LED Display  
(Displays water  
temperature and error  
codes)  
Notice: Display shows  
°F only.  
°F  
POWER  
ON/OFF  
ON/OFF  
Indicator  
Higher (Hotter)  
Lower (Cooler)  
100 102 104 106 108 110 112 114 116 118 120* 125 130 135 140 °F  
38 39 40 41 42 43 44 46 47 48 49* 52 54 57 60 °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  
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.  
to 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  
personnel qualified in gas appliance repair. a 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 19 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  
information.  
NOTICE: If the pressure relief valve  
on 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  
arresting devices can be used to minimize  
the problem.  
hot water temperatures and  
other potentially hazardous  
conditions.  
Housekeeping  
Before performing Housekeeping tasks to  
this water heater, turn the unit off and  
disconnect the power supply.  
HOW TO CLEAN THE WATER FILTER:  
!
DANGER: Shock Hazard  
● Make sure the unit is OFF and the  
electrical power supply has been  
disconnected.  
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  
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  
heater.  
components.  
● Drain heater. See “Draining The  
Water Heater” section on page 31.  
remaining moisture with a dry soft cloth.  
● Unscrew the water filter, and slide the  
filter out.  
!
DANGER: Combustible  
materials, such as clothing,  
cleaning materials or  
flammable liquids, etc.,  
must not be placed against  
or next to the water heater.  
To ensure sufficient ventilation and  
combustion air supply, proper clearances  
must be maintained.  
● DO NOT tap the filter as it may deform  
and/or damage the filter.  
DO NOT block or obstruct the air  
intake opening of the water heater.  
A minimum of 12” (30 cm) is required  
between this combustion air inlet  
opening and any obstruction.  
● To remove severe sediment and dirt, use  
a soft brush and wash with running  
water.  
● Return the filter to the water heater and  
screw in the filter.  
The Air Intake and Water filters should be  
cleaned on a monthly basis.  
● Turn the electrical power supply and  
cold water supply ON to the water  
heater.  
29  
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Housekeeping, continued  
CLEANING THE AIR INTAKE FILTER  
(Indoor Model Only):  
● Make sure the unit is OFF and the  
electrical power supply has been  
disconnected.  
CLEANING THE WATER HEATER AND  
REMOTE CONTROL(S):  
!
DANGER: DO NOT  
attempt to operate the water  
heater without the air intake  
filter.  
● Make sure the unit is OFF and the  
electrical power supply has been  
disconnected.  
NOTICE: The water heater  
may not work if the air intake  
filter is severely clogged.  
● Unscrew the holding screw to the right of  
the filter, and slide the filter down.  
● DO NOT scrub the appliance with a  
brush.  
● Using a vacuum cleaner, remove any loose ● Use only mild soapy water; other  
dust particles. DO NOT tap the filter as it  
may deform and/or damage the filter.  
cleaners may damage the surface of  
the water heater.  
● To remove severe dust, use a soft brush  
and wash with running water.  
● DO NOT remove any label including the  
rating plate while cleaning or servicing.  
● 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 tightening the  
screw.  
● 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 10 for vent sealing  
instructions.  
It is recommended that qualified service  
personnel familiar with Category III venting  
inspect the venting system.  
DO NOT operate the unit if vent system  
shows signs of leaking exhaust.  
Check to make sure that the air intake and  
vent outlet on the OUTDOOR water heater or  
Check vent connection joint sections with a  
solution of soapy water to assure air-tightness the air intake filter and the vent terminal on  
while the unit is operating.  
the INDOOR water heater has not been  
blocked or contain debris.  
Burner Sight  
Glass  
Burner Inspection  
Visually inspect the main burners annually.  
!
CAUTION: For your safety, burner  
Exploded View of  
Burner  
inspection and cleaning should be  
performed only by qualified service  
personnel.  
Through the side sight glass, inspect the  
burner flame. Blue flames should be seen  
when the main burner is firing. See figure on  
left for location of sight glass.  
For cleaning, a vacuum cleaner can be used  
on the burner.  
If any unusual burner operation is noted, the  
water heater should be shut off until qualified  
service assistance can be obtained.  
Proper burner pattern.  
Blue Flame  
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 heater’s operation and controls should be  
to the appliance should be turned off.  
After a long shut-down period, the water  
checked by qualified service personnel.  
The water heater and piping should be  
drained if they might be subjected to freezing  
temperatures.  
Condensate Trap Inspection  
On a regular basis, inspect the condensate  
trap to ensure there is enough water in the  
trap and the condensate is draining properly.  
!
CAUTION: Do not  
operate without the  
Ensure that condensate is disposed of per  
local codes and regulations.  
condensate trap connected  
to the vent and routed to  
the proper drain.  
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.  
stream of water to a suitable drain where it  
will cause no damage. Leave water heater  
as is until next use.  
PRIORITY  
F
POWER  
ON/OF  
F
Turn off the switch on the remote control.  
Close the gas shut-off valve(s).  
T
o put the water heater back into operation  
after draining, follow the steps below.  
Unplug the power supply cord (or  
disconnect breaker) at least 10 seconds  
after step #1.  
To Hot Water  
Faucet(s)  
Reinstall the drain plug and water filter.  
Close the hot water outlet drain valve.  
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.)  
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.  
Draining the water heater  
Using a suitable container to catch 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  
WARNING: Failure  
to follow these  
instructions while  
draining the water  
heater can cause serious  
damage to the water  
heater as well as  
NOTICE: The water heater may not  
operate unless the above procedure is  
followed correctly.  
diagnostic testing and ease of flushing the  
system.  
Optional Maintenance Method  
Isolator valve kits may be purchased as optional  
items from manufacturer, distributor or place  
of purchase. They allow for one person full  
personal injury,  
including scalding.  
The kit includes two full port isolation valves,  
one for the cold side and one for the hot side.  
CAUTION:  
Even when drained  
Hot Water Service Valve  
Pressure Relief Valve  
properly, a small amount  
of water will remain in  
the water heater. In cold  
weather, conditions this  
water can freeze. If this  
happens allow the defrost  
protection on the heater  
at least 30 minutes to melt  
the frozen water or the  
water heater may not  
work properly.  
Cold Water Service  
Valve  
Drain  
Water Inlet  
Water Outlet  
Freeze Protection  
Where the water heater may be exposed to  
freezing conditions, even for a short period of  
time, be sure to drain all water from the unit  
as instructed above.  
Another method of freeze prevention is by  
running a small volume of water. Running  
water will protect the water heater, piping  
and valves.  
WARNING: Failure  
to drain the water  
heater can cause serious  
damage to the water  
heater as well as  
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.  
Close the gas shut-off valve.  
The water heater is equipped with a Freeze  
Protection Electric Heater. As long as  
electricity is supplied to the water heater, it  
prevents freezing inside the water heater down  
to an ambient temperature of approximately  
minus 20°F (-28°C) (without wind conditions).  
NOTICE: DO NOT  
unplug the electric  
power supply cord for  
freeze protection.  
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 hot 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 control.  
● 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.  
Scale buildup in heat exchanger.  
● Increase water flow.  
● Clean water inlet filter.  
● Clean aerator.  
● Check for error code. If required,  
contact a dealer for service.  
Hot and cold water lines reversed.  
The temperature may be set too low.  
The gas valve is not fully opened.  
Gas supply pressure is low.  
● Reverse water connections.  
Water not hot enough.  
● Increase the temperature setting.  
● Check and open the gas valve fully.  
● Call your gas company to verify the  
gas meter and gas piping size.  
Bleed over in one of the hot water  
fixtures.  
● Call dealer for service.  
Water too hot.  
Temperature is set too high.  
● Decrease the temperature setting.  
Water shutoff valve is not fully opened.  
● Check shutoff valve and open fully.  
Small amount of water has been heated.  
● Allow more water to flow.  
Fan continues to rotate after hot water  
faucet is closed.  
This function is to supply hot water  
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:  
If the error code is still shown:  
● Close the hot water faucet, turn off the switch on the remote ● Turn off the hot water faucet and turn off the switch on the  
control.  
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.  
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.  
If the error code remains in the display:  
● 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 or 12  
The Gas shutoff valve is not opened fully.  
Gas service has been interrupted.  
● Open the Gas shutoff valve fully.  
● Contact gas utility company.  
● Fill up LP Gas container or replace with  
LP Gas is running low. (LP models only).  
a new cylinder of LP Gas.  
● Bleed all air from gas lines.  
Air in Gas Line.  
● Ensure appliance is properly grounded.  
Power supply not grounded.  
Low inlet gas pressure due to improper sizing  
Wrong gas type.  
● Ensure gas line, meter, and regulator are  
sized properly.  
● Ensure gas type is correct.  
Improper venting, vent material, or vent  
configuration.  
● Ensure venting is per Use & Care  
Manual. Contact a dealer for service.  
15  
The hot water faucet is not opened enough.  
● Open the faucet more to secure enough  
volume.  
● Contact a dealer for service.  
Water heater has build up of lime deposits.  
05 or 13  
Air intake of the unit and/or vent termination  
may be blocked.  
● Remove any obstructions of the air  
intake or vent termination.  
(On error code 05 only: Every  
Ventilator or other vents of the room may be  
● Clean the air intake of any dust or  
60 seconds you hear an alarm blocked.  
grease buildup.  
or when the faucet is closed,  
the alarm stops.)  
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.  
(On error code 13 only: Unit  
shuts down.)  
Heavy ventilation by other equipment or  
appliances causing the lack of air intake to the  
water heater.  
● Lower the level of the ventilation of  
other equipment or appliances.  
Indoor Water Heater Only  
Air shortage may be caused by too much steam  
in the unit.  
● Avoid direct contact from steam.  
Air intake filter is clogged.  
● Clean the air intake filter.  
If the error code is still displayed after taking  
the above steps.  
● Please contact a dealer for service.  
1L  
99  
Water heater has buildup of lime deposits.  
● Contact a dealer for service.  
Decrease of blower motor ventilation volume.  
● Clean any blockage from heat  
exchanger fins and/or blower motor  
Outdoor Water Heater Only (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:  
Outdoor Water Heater  
Instructions For Placing a Parts Order  
Address parts orders to the distributor or store  
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  
Side View  
Front View  
Film Type OHL  
Heat  
Transfer  
Pipe  
Electrode  
Burner  
Assy.  
Heat  
Exchanger  
Assy.  
Flame  
Rod  
Nozzle  
Stand Assy.  
Blower  
Motor  
Gas Valve  
Assy.  
Circuit Board  
Hot Water  
Outlet  
Gas Supply  
Water Flow  
Drain Plug  
Cold Water  
Supply  
Solenoid  
Indoor Water Heater  
Unit Cover Panel  
Side View  
Front View  
Film Type OHL  
Heat  
Transfer  
Pipe  
Electrode  
Heat  
Exchanger  
Assy.  
Burner  
Assy.  
Flame  
Rod  
Nozzle  
Stand Assy.  
Circuit Board  
Gas Valve  
Assy.  
Hot Water  
Outlet  
Gas Supply  
Drain Plug  
Water Supply  
Water Flow  
Solenoid  
34  
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The content on this page is intended for use by qualified  
installation/service personnel ONLY.  
WARNING: Improper adjustment, alteration,  
service or maintenance can cause property damage,  
personal injury, or death.  
!
DANGER: Hotter water increases  
the potential for Hot Water SCALDS.  
Time/Temperature Relationship in Scalds  
Temperature Setting DIP Switch Adjustment  
Required adjustment for up to 140°F (60°C) water temperature settings  
Water Temperature  
Time To Produce a Serious Burn  
120°F (49°C)  
125°F (52°C)  
130°F (54°C)  
135°F (57°C)  
140°F (60°C)  
145°F (63°C)  
150°F (66°C)  
More than 5 minutes  
1-1/2 to 2 minutes  
About 30 seconds  
About 10 seconds  
Less than 5 seconds  
Less than 3 seconds  
About 1-1/2 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 140°F (60°C) is  
not required.  
Follow the instructions below if it is determined that a setting of up to  
140°F (60°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 diagram to the right for DIP Switch location).  
● 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.  
ON  
2
3
4
1
2
3
4
1
● Press the “SW1” 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.  
SW1  
SW2  
ON  
SW3  
1
2
3
4
1
2
3
4
● 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.  
● Attach the unit’s front cover.  
Location of DIP Switches on PC Board.  
● Turn on the remote control, gas and water shutoff valves.  
● Check and ensure safe operation and performance of the water heater.  
ON  
See steps below to LIMIT maximum water temperature setting  
to 120°F (49°C).  
4
2
3
1
As set from factory  
Follow first four bullets points listed above, then continue as listed below:  
● Press the “SW2” 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.  
ON  
4
2
3
1
● 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 will turn off.  
Setting during adjustment  
to DIP Switch #4  
for temperature.  
● Attach the unit’s front cover.  
● Turn on the remote control, gas and water shutoff valves.  
● Check and ensure safe operation and performance of the water heater.  
ON  
4
2
3
1
Setting after adjustment  
to DIP Switch #4  
for temperature.  
“SW2”  
Button  
LED  
SW1  
SW2  
ON  
“SW1”  
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.  
Important Instructions for the Commonwealth of Massachusetts  
The Commonwealth of Massachusetts requires compliance with regulation  
248 CMR 4.00 and 5.00 for installation of through – the – wall vented gas  
appliances as follows:  
4. INSPECTION. The state or local gas inspector of the side wall horizontally  
vented gas fueled equipment shall not approve the installation unless, upon  
inspection, the inspector observes carbon monoxide detectors and signage  
installed in accordance with the provisions of 248 CMR 5.08(2)(a)1 through 4.  
(a) For all side wall horizontally vented gas fueled equipment installed in  
every dwelling, building or structure used in whole or in part for residential  
purposes, including those owned or operated by the Commonwealth and  
where the side wall exhaust vent termination is less than seven (7) feet above  
finished grade in the area of the venting, including but not limited to decks  
and porches, the following requirements shall be satisfied:  
(b) EXEMPTIONS: The following equipment is exempt from 248 CMR  
5.08(2)(a)1 through 4:  
1. The equipment listed in Chapter 10 entitled "Equipment Not Required To  
Be Vented" in the most current edition of NFPA 54 as adopted by the Board;  
and  
1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At the time  
of installation of the side wall horizontal vented gas fueled equipment, the  
installing plumber or gasfitter shall observe that a hard wired carbon  
monoxide detector with an alarm and battery back-up is installed on the floor  
level where the gas equipment is to be installed. In addition, the installing  
plumber or gasfitter shall observe that a battery operated or hard wired carbon  
monoxide detector with an alarm is installed on each additional level of the  
dwelling, building or structure served by the side wall horizontal vented gas  
fueled equipment. It shall be the responsibility of the property owner to secure  
the services of qualified licensed professionals for the installation of hard  
wired carbon monoxide detectors  
2. Product Approved side wall horizontally vented gas fueled equipment  
installed in a room or structure separate from the dwelling, building or  
structure used in whole or in part for residential purposes.  
(c) MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING  
SYSTEM PROVIDED. When the manufacturer of Product Approved side  
wall horizontally vented gas equipment provides a venting system design or  
venting system components with the equipment, the instructions provided by  
the manufacturer for installation of the equipment and the venting system  
shall include:  
1. Detailed instructions for the installation of the venting system design or the  
venting system components; and  
a. In the event that the side wall horizontally vented gas fueled equipment is  
installed in a crawl space or an attic, the hard wired carbon monoxide  
detector with alarm and battery back-up may be installed on the next  
adjacent floor level.  
2. A complete parts list for the venting system design or venting system.  
(d) MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING  
SYSTEM NOT PROVIDED. When the manufacturer of a Product Approved  
side wall horizontally vented gas fueled equipment does not provide the parts  
for venting the flue gases, but identifies "special venting systems", the  
following requirements shall be satisfied by the manufacturer:  
b. In the event that the requirements of this subdivision can not be met at the  
time of completion of installation, the owner shall have a period of thirty (30)  
days to comply with the above requirements; provided, however, that during  
said thirty (30) day period, a battery operated carbon monoxide detector with  
an alarm shall be installed.  
1. The referenced "special venting system" instructions shall be included with  
the appliance or equipment installation instructions; and  
2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon  
monoxide detector as required in accordance with the above provisions shall  
comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified.  
2. The "special venting systems" shall be Product Approved by the Board, and  
the instructions for that system shall include a parts list and detailed  
installation instructions.  
3. SIGNAGE. A metal or plastic identification plate shall be permanently  
mounted to the exterior of the building at a minimum height of eight (8) feet  
above grade directly in line with the exhaust vent terminal for the horizontally  
vented gas fueled heating appliance or equipment. The sign shall read, in print  
size no less than one-half (1/2)“ in size, "GAS VENT DIRECTLY BELOW.  
KEEP CLEAR OF ALL OBSTRUCTIONS".  
(e) A copy of all installation instructions for all Product Approved side wall  
horizontally vented gas fueled equipment, all venting instructions, all parts  
lists for venting instructions, and/or all venting design instructions shall  
remain with the appliance or equipment at the completion of the installation.  
36  
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