Rheem Water Heater ECO 180DV User Guide
Use & Care Manual  
With Installation Instructions for the Installer  
Direct Vent 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.  
Paloma  
PH-25RDVS (N,P)  
Rheem/ Ecosense  
RTG-66DV (N,P)  
ECO-180DV (N,P)  
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 advice.  
Ruud RUTG-66DV (N,P)  
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.  
Richmond  
RMTG-66DV (N,P)  
Do not destroy this manual. Please read carefully and keep in a safe  
place for future reference.  
Recognize this symbol as an indication of Important Safety  
Information!  
!
California Proposition 65 Warning: This product contains  
chemicals known to the State of California to cause cancer, birth  
defects or other reproductive harm.  
!
WARNING: If the information in these instructions is not followed exactly,  
a fire or explosion may result, causing property damage, personal injury or death.  
!
gas supplier’s instructions.  
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 any other appliance. To do so may  
result in an explosion or fire.  
● 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.  
— WHAT TO DO IF YOU SMELL GAS  
— 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.  
● 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  
S
I
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31-92683-000  
CERTIFIED  
Printed in Japan  
E
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R
AP14558 (01/08)  
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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 terminal, the air intake, and the coaxial vent system on the 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 coaxial vent  
system inspection.  
WARNING!  
Gasoline, as well as other flammable materials and liquids (which include, but are not  
limited to adhesives, solvents, paint thinners etc.), and the vapors they produce are  
extremely dangerous. DO NOT handle, use or store gasoline or other flammable or  
combustible materials anywhere near or in the vicinity of a water heater or any other  
appliance. Be sure to read and follow the labels on the water heater, as well as the warnings  
printed in this manual. Failure to do so can result in property damage, bodily injury or  
death.  
D A N G E R  
FLAMMABLES  
Flammable Vapors  
Vapors from flammable  
liquids will explode and  
catch fire causing death or  
severe burns.  
Do not use or store flammable  
products such as gasoline,  
solvents or adhesives in the  
same room or area near the  
water heater.  
Water heater has a main  
burner flame.  
The main burner flame:  
1. which can come on  
at any time and  
2. will ignite flammable  
vapors.  
Vapors:  
1. cannot be seen,  
2. are heavier than air,  
3. go a long way on the  
floor and  
4. can be carried from  
other rooms to the  
main burner flame by  
air currents.  
Keep flammable products:  
1. far away from heater,  
2. in approved containers,  
3. tightly closed and  
4. out of children's reach.  
Installation:  
Do not install water heater  
18" above the floor. This will  
where flammable products will reduce, but not eliminate, the  
be stored or used unless the  
main burner flame is at least  
risk of vapors being ignited  
by the main burner flame.  
Read and follow water heater warnings and instructions. If  
owners manual is missing, contact the retailer or manufacturer.  
3
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IMPORTANT SAFETY INFORMATION  
READ ALL INSTRUCTIONS BEFORE USING.  
!
DANGER!  
WATER TEMPERATURE SETTING  
Safety and energy conservation are factors to be considered when selecting the water  
temperature setting of a water heater’s remote control. Water temperatures above  
125°F (52°C) can cause severe burns or death from scalding. Be sure to read and follow  
the warnings outlined on the label pictured below.  
Time/Temperature Relationship in Scalds  
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& # 0 ) ' 4  
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)  
*16  
155°F (68°C)  
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.  
$740  
!
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.  
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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 26 & 27 for more  
details.)  
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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.  
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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 85°F (29°C) and above 120°F (49°C) can be achieved  
with the MAIN (UMC-117) remote control. Temperatures  
of 85°F (29°C) can be achieved with the Bath (USC-117  
or USC2-117) remote control. 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)  
85 100 102 104 106 108 110 112 114 116 118 120* 125 130 135 140 °F  
29 38 39 40 41 42 43 44 46 47 48 49* 52 54 57 60 °C  
* Temperatures 85°F(29°C) and above 120°F (49°C)  
can be achieved with the Main (UMC-117) remote  
control. See page 34 & 35 for minimum and  
maximum temperature adjustment.  
4
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DANGER!  
NATURAL GAS AND LIqUEFIED PETROLEUM MODELS  
Both LP and natural gas have an odorant added to aid in detecting a gas leak. Some  
people may not physically be able to smell or recognize this odorant. If you are unsure or  
unfamiliar with the smell of LP or natural gas, ask the gas supplier. Other conditions, such as  
“odorant fade”, which causes the odorant to diminish in intensity, can also hide or camouflage  
a gas leak.  
Notice: If a gas leak is present or suspected:  
● Do not attempt to find the cause yourself.  
● Do not try to light any appliance.  
● Water heaters utilizing LP gas are different  
from natural gas models. A natural gas  
water heater will not function safely on LP  
gas and vice versa.  
● Do not touch any electrical switch.  
● Do not use any phone in your building.  
● No attempt should ever be made to  
convert the water heater from natural gas  
to LP gas. To avoid possible equipment  
damage, personal injury or fire, do not  
connect the water heater to a fuel type not  
in accordance with the unit data plate;  
propane for propane units and natural gas  
for natural gas units. These units are not  
certified for any other fuel type.  
● Leave the building immediately and make  
sure your family and pets leave also.  
● Leave the doors open for ventilation and  
contact the gas supplier, a qualified service  
agency or the fire department.  
● Stay away from the building until the  
service call has been made, the leak is  
corrected and a qualified agency has  
determined the area to be safe.  
● LP appliances should not be installed below  
grade (for example, in a basement) if such  
installation is prohibited by federal, state  
and/or local laws, rules, regulations or  
customs.  
● Propane or LP gas must be used with great  
caution. It is heavier than air and will  
collect first in lower areas, making it hard  
to detect at nose level.  
● Before attempting to light the water heater,  
make sure to look and smell for gas leaks.  
Use a soapy solution to check all gas fittings  
and connections. Bubbling at a connection  
indicates a leak that must be corrected.  
When smelling to detect a gas leak, be sure  
to sniff near the floor also.  
● Gas detectors are recommended in LP  
and natural gas applications and their  
installation should be in accordance  
with the detector manufacturer’s  
recommendations and/or local laws,  
rules, regulations or customs.  
● It is recommended that more than one  
method, such as soapy solution, gas  
detectors, etc., be used to detect leaks  
in gas applications.  
5
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IMPORTANT SAFETY INFORMATION  
READ ALL INSTRUCTIONS BEFORE USING.  
!
WARNING!  
For your safety, the information in this manual must be followed to minimize the risk  
of fire or explosion, electric shock, or to prevent property damage, personal injury or  
loss of life.  
FOR INSTALLATIONS IN THE STATE OF CALIFORNIA  
California Law requires that 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  
6
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Installing the water heater :  
This water heater must be installed in accordance with these instructions, local codes, utility company  
requirements and/or in the absence of local codes, use the latest edition of the American National Standard/  
National Fuel Gas Code. A copy can be purchased from either the American Gas Association, 400 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 Water Heater  
The water heater should not be located in  
an area where leakage of the heat exchanger  
or connections will result in damage to the  
area adjacent to it or to lower floors of the  
structure.  
● The water heater should be installed with  
the proper venting materials and termination  
suitable for Category III venting.  
● 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.  
When such areas cannot be avoided, it is  
recommended that a suitable catch pan,  
adequately drained, must be installed under  
the water heater.  
● Failure to install and properly vent the water  
heater to the outdoors as outlined  
in the Venting Section of this manual  
can result in unsafe operation.  
The pan must not restrict combustion  
air flow.  
● Long hot water lines should be insulated to  
!
WARNING:  
conserve water and energy.  
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.  
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.  
● The water heater and water lines should  
be protected from exposure to freezing  
temperatures.  
● Do not install the water heater in  
bathrooms, bedrooms, any occupied rooms  
normally kept closed, or in outdoor areas.  
Because of natural air movement in a room or  
other enclosed space, flammable vapors can be  
carried some distance from where their liquids  
are being used or stored. The open flame of  
the water heater’s main burner can ignite these  
vapors causing an explosion or fire which  
may result in severe burns, death or property  
damage.  
● Do not install 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 "  
(1.3 cm)  
min.  
min. 1"  
min. 1"  
1/2 "  
(2.5 cm)  
(2.5 cm)  
(1.3 cm)  
● 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).  
min. 12"  
(24" (61 cm) minimum is  
recommended for service)  
(30 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.  
Top = 12" (30 cm) Bottom = 12"  
Front = 12" (30 cm) Back = 0"*  
Side = 1/2"  
CoAxial Vent = 1"  
* (with support bracket)  
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.  
● Maintain a minimum clearance of  
1” (2.5 cm) around the coaxial 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  
!
WARNING: Follow vent  
manufacturer’s instruction  
while installing vent. If  
required, provide  
additional clearances from  
vent to combustibles per  
vent manufacturer’s  
instruction.  
● 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.  
to the clearances stated on the label.  
1” (2.5 cm) min  
1” (2.5 cm)  
min  
1” (2.5 cm)  
min  
Coaxial Vent Pipe  
& Air Intake  
7
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Installing the water heater:  
NOTICE: The water heater  
Corrosive Atmospheres  
should not be installed near  
an air supply containing  
halogenated hydrocarbons.  
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
i th 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
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E
R
H
E
A
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S
It is imperative that all persons who are expected to install, operate or  
adjust this water heater read the instructions carefully so they may  
understand how to perform these operations. If you don’t understand  
these instructions or any terms within it, seek professional advice.  
Any questions regarding the operation, maintenance, service or  
warranty of this water heater should be directed to the seller from whom  
it was purchased. If additional information is required, refer to the  
section on How to Obtain Service Assistance.  
°F  
Do not destroy this manual. Please read carefully and keep in  
place for future reference.  
a
safe  
Wood Screw x 5pcs.  
Washer x 4 pcs.  
COMMERCIAL  
GAS TER HEATERS  
YEAR HEA EXCHANGER AND  
YEAR ARTS LIMITED ARRANTY  
T
ANKLESS  
!
!
Recognize this symbol as an indication of Important Safety  
nformation!  
WA  
WITH  
1
A
3
T
California Proposition 65 Warning: This product contains  
chemicals known to the State of California to cause cancer birth  
P
W
,
defects or other reproductive harm.  
W
A RNING: 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.  
To  
do so may result in an  
Improper installation, adjustment,  
—
WHAT TO DO IF YOU SMELL GAS  
Do not try to light any appliance.  
alteration, service or maintenance can cause  
property damage, personal injury, or death  
Refer to this manual. Installation and service  
.
�
�
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’s phone. Follow the gas  
supplier’s instructions.  
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Printed in USA  
Tankless Unit  
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Remote Control  
Assembly Kit  
Manual Appliance  
Gas Shut-off Valve  
Use & Care Manual  
8
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The water heater must be installed with a 3”/5” diameter UL approved Category III Coaxial Stainless Steel  
appliance coaxial vent pipe and an appropriate adapter.  
Venting  
DANGER: Failure to  
Notes on pre-existing vent:  
The installation of venting must comply  
with national codes, local codes and the  
vent manufacturer’s instructions.  
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,  
YES!  
NO!  
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.  
If the water heater is being installed as a  
replacement for an existing water heater, a  
thorough inspection of the existing venting  
and air intake 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 venting and air intake 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 putting the water heater  
into service.  
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 coaxial 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.  
(Refer to pages 13 and 14 for an example of  
the concentric vent.)  
Use the screws provided to connect the  
coaxial vent pipe with the anti-disconnection  
joint.  
Follow coaxial vent manufacturer’s  
installation instructions and their  
recommended clearances to combustibles.  
The unit can be vented either horizontally  
or vertically.  
Coaxial vent pipe runs must be adequately  
supported along both horizontal and vertical  
runs.  
outlined in the Venting  
section of this manual.  
WARNING: Use 3”/5”  
UL approved Category III  
Stainless Steel vent  
material only. No other  
vent material is permitted.  
See the back page of this manual  
for additional requirements for the  
Commonwealth of Massachusetts.  
WARNING: Refer to  
page 7 for clearances to  
combustible material.  
The maximum recommended unsupported  
span should be no more than five (5) feet  
(1.5 m). Support isolation hanging bands  
should be used. DO NOT use wire. (See  
diagram below).  
Venting Lengths  
MAXIMUM VENT LENGTH: The  
condensate formed during operation of the  
unit is evacuated from the appliance and to  
prevent rain from entering the appliance.  
system will not operate if there is excessive  
restriction (pressure drop) in the venting  
system. A maximum 26’(8.0 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 24’  
6"(7.5 m), three elbows can be used with 23’  
An upward slope toward the vent terminal is  
not acceptable for horizontal venting.  
Number Maximum  
of 90°  
elbows  
(bends)  
Length of  
Straight  
Pipe  
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 94° elbow  
is included in the installation and the wall  
plates are installed.  
(7.0 m) or four elbows can be used with 21  
6" (6.5 m) of vent pipe.  
’
1
2
3
4
26’  
(8.0 m)  
24' 6"’  
(7.5 m)  
A 90° elbow is equivalent to 1’6” (.5 m) of  
straight pipe. A 45° elbow is equivalent to  
9” (.25 m) of straight pipe.  
23"  
(7.0 m)  
The vent termination does not count as  
straight pipe when determining total vent  
lengths.  
Notice: Make sure that the seam of the inner  
vent pipe in horizontal runs is toward the  
top of the installation (see diagram to the far  
left).  
21' 6"  
(6.5 m)  
The 94° elbow is equivalent to a 90° elbow.  
The vent should be installed with a slight  
downward slope of 7/8” per foot of  
horizontal run toward the vent terminal (see  
diagram below). This ensures that any  
Vent Seam  
7/8" per foot  
Wall Plates  
downward slope  
94° Elbow  
Fire  
2’  
(61 cm)  
Stop  
Vent Pipe  
Max.  
9
Ceiling  
Board  
Inspection  
Inspection  
Access  
Panel #2  
Access Panel #1  
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Installing the water heater:  
Venting Through Closed Spaces  
If the coaxial vent piping passes through a closed space, a minimum  
clearance of 1” (2.5 cm) when installed horizontally or 6” (15 cm) when  
installed vertically should be maintained between the coaxial vent pipe  
and combustibles and noncombustibles. Be sure to follow local codes  
and vent manufacturer’s installation instructions.  
7/8" per foot  
Wall Plates  
downward slope  
94° Elbow  
Fire  
2’  
(61 cm)  
Max.  
Stop  
Vent Pipe  
For maintenance and inspection purposes, the following access panels  
are required.  
Ceiling  
Board  
● 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 coaxial vent pipe enters the ceiling. The other access  
panel should be near the vent termination.  
Inspection  
Inspection  
Access  
Panel #2  
Access Panel #1  
● A ventilation access panel with a 16 in2 (103 cm2) opening should  
be provided every 10 ft (3 m).  
Appliance Vent Adapter  
CAUTION: Ensure that  
the appliance vent adapter is  
securely attached to the water  
heater collar.  
The water heater must be installed  
with a UL 1738 approved Category III  
Stainless Steel appliance coaxial vent  
adapter.  
● Slide adapter end “A” down over heater  
collar “B” as far as it will go.  
● Use the screws provided with the vent  
adapter to attach the adaptor to the heater  
collar.  
Exhaust  
Flow  
Read the following instructions before  
installation.  
Appliance  
Vent Adapter  
A
● Test fit the adapter over the water heater  
NOTICE: Follow the appliance coaxial vent  
adapter manufacturer’s instructions.  
collar before proceeding.  
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 14  
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 13 and 14  
for DOWNWARD and UPWARD slope for  
horizontally vented water heaters.  
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.  
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.  
10  
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area Where terminal iS nOt permitted  
air Supply inlet  
V Vent terminal  
X
Horizontal Vent Terminal Location  
The following information should be used for determining the proper location of the vent  
terminal for direct vent tankless water heaters.  
Canadian installations 1  
uS installations 2  
A= Clearance above grade, veranda,  
porch, deck or balcony.  
12 inches (30 cm) above anticipated  
snow level.  
12 inches (30 cm) above anticipated  
snow level.  
B= Clearance to window or door that  
may be opened.  
6 inches (15 cm) for appliances <  
10,000 Btuh (3 kW), 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).  
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  
coaxial 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).  
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.  
7 feet (2.13 m)†  
Not Allowed  
*
M = Clearance under veranda, porch,  
deck or balcony.  
Not Allowed  
1
2
†
In accordance with current CSA-B149.1 Installation Codes.  
In accordance with current ANSI Z223.1/ NFPA 54 National Fuel Gas Code.  
A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family  
dwellings and serves both dwellings.  
*
For clearances not specified in ANSI 223.1/NFPA 54 or CSA-B149.12, one of the following shall be indicated:  
a)  
b)  
A minmum clearance value determined by testing in accordance with section 2.20, or;  
A reference to the following footnote: "Clearance in accordance with local installtion codes and the require-  
ments of the gas supplier."  
11  
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Installing the water heater:  
Additional Considerations  
Indoor 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.  
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)  
Do NOT terminate vent directly on brick or masonary surfaces. A  
rust resistant sheet metal backing plate (1x1 foot) (30x30 cm) is  
recommended behind vent. See figure on left.  
Inside  
Caulk  
6’ (1.8 m)  
Caulk  
zone or to edge of window  
etc.,starting within 6’ (1.8 m).  
Corner  
6’ (1.8 m)  
Caulk Zone  
Caulk  
Do Not locate vent terminal too close to shrubbery, as flue gases  
may damage them.  
RTV silicone caulk  
1 ft. sq. (30 x 30 cm) sheet metal plate on  
brick or masonry surface, recommended.  
4’  
(1.2 m)  
Caulk all cracks, seams and joints within six (6) feet (1.8 m) of  
vent terminal.  
WARNING Moisture in the flue gas will condense as it  
:
Caulk around wall face plate for weather tight seal.  
leaves the vent terminal. In cold weather this condensate can  
freeze on the exterior wall, under the eaves and on  
surrounding objects. Some discoloration to the exterior of  
the building is to be expected. However, improper location  
or installation can result in severe damage to the structure  
or exterior finish of the building  
All painted surfaces should be primed to lessen the chance of  
physical damage. Painted surfaces will require maintenance.  
Insulate vent pipe of water heaters exposed to cold conditions  
(attics, crawl spaces, etc.) with inflammable material to help prevent  
moisture from accumulating in the vent pipe. The insulation should  
be rated for the temperature and should not contain substances that  
corrode the vent pipe.  
WARNING: For multiple unit installation, a minimum  
distance between vent terminations must be maintained to  
prevent recirculation of vent gases. Maintain a center-to-center  
distance between vent terminations of 19 inches (48 cm) for two  
unit installation. Maintain a center-to-center distance between  
vent terminations of 21 inches (53 cm) for three or more unit  
installation.  
Do NOT extend exposed vent pipe of indoor water heaters outside  
of building.  
Guard vent against accidental contact with people and pets.  
12  
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Installing the water heater:  
Horizontal Vent Installation continued.  
Use 4 hollow wall anchors, at least  
1/8 inch (0.32 cm) in diameter and of  
appropriate length for the thickness of  
the sheathing, if sheathing is particle  
board or other composite material.  
Install the appliance adapter onto the  
appliance and use (4) four screws to  
secure the appliance adapter to the  
appliance. Now attach other required  
vent and air intake material between  
the appliance adapter and the horizontal  
vent termination.  
Inner W a ll  
Inner W a ll Plate  
Outer Wall Plate  
94° Elbow  
Use 4 #10x1-1/4” wood screws for  
plywood, solid wood sheathing or  
Vent  
Pipe  
Appliance  
Vent Adapter  
members. Use suitable masonry anchors  
when passing through solid masonry  
walls. Reinstall the decorative sheathing  
around the faceplate. This assembly may  
be painted to match the exterior decor.  
Outer  
W all  
Maintain the proper clearance between  
the vent pipe and combustible or non-  
combustible material as required by the  
vent manufacturer.  
Caulk for  
weather s  
eal  
W ater  
Heater  
Outside W a ll  
There is a 1" (2.5 cm) minimum  
clearance required between air  
intake pipe and combustible or non  
combustible material.  
Apply silicone sealant or silicone/latex  
caulk around the vent section where  
it passes through the plate and around  
the plate where it is attached to the  
structure. This will provide a weather  
seal to keep moisture outside the  
building. Ensure a sufficient seal is  
made. Now attach the female end of  
the air intake tee to the male end of the  
3”/5” concentric vent pipe.  
Mounting  
Brackets  
Side V i ew  
Side View  
Proper support be provided for the vent  
and air intake pipes as mentioned in the  
venting section.  
WARNING: Use  
UL approved Category III  
vent material only. No other  
vent material is permitted.  
Support method used should isolate  
the vent pipe from floor joist or other  
structural members to help prevent the  
transmission of noise and vibration.  
Push firmly on the air intake tee until  
the outer jacket has made contact with  
the snap ring located on the male end of  
the 3”/5” concentric vent pipe section.  
When fully assembled the outer female  
end will overlap the male end 1 inch  
(25.4 mm).  
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 the self-tapping screws provided  
with the vent kit to connect the two  
outer pipes.  
Seal the over lapping area of the outer  
pipe (5” concentric pipe) with a thick  
bead of caulk.  
7/8" per foot  
Wall Plates  
downward slope  
94° Elbow  
Fire  
2’  
Stop  
Vent Pipe  
(61 cm)  
Max.  
Ceiling  
Board  
Inspection  
Access Panel #1  
Inspection  
Access  
Panel #2  
Example A: Typical Horizontal Termination  
w/ 7/8” per foot DOWNWARD Slope  
13  
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Installing the water heater:  
Vertical Vent Termination Location  
The location of the vent terminal depends on the following  
minimum clearances and considerations (see diagram at left):  
Only Rheem approved  
termination and parts  
should be used during  
installation.  
Minimum twelve (12) inches (30 cm) above roof.2  
Minimum twelve (12) inches (30 cm) above anticipated  
snow level.  
Vent Pipe  
Through Roof  
Maximum twenty-four (24) inches (60 cm) above roof level  
without additional support for vent.  
Four (4) feet (1.2 m) from any gable, dormer or other  
roof structure with building interior access (i.e., vent,  
window, etc.).  
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  
Min. 12" (30 cm) Above Roof 1  
Min. 12" (30 cm) Above Anticipated Snow Level.  
Max. 24" (60 cm) Above Roof (Without Additional Support)  
2
For installations in Canada 18" (45.7 cm).  
1 Min. 18" (46 cm) Above Roof for installations in Canada.  
3 For installations in Canada 6' (1.8 m).  
Vertical Vent Installation  
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. Maintain  
the recommended air space clearance to  
combustible materials and building insulation.  
vertical or horizontal runs as previously  
mentioned. If required, use silicone sealant  
at the point the vent connector joins the  
water heater.  
Notice: Only Rheem  
approved termination  
and parts should be used  
during installation.  
Install adequate flashing where the vent  
pipe passes through the roof. Determine the  
Once the vent terminal location has been  
determined, make a hole through the roof and vent terminal height and install the vent pipe  
interior ceiling to accommodate the vent pipe. accordingly. Refer to the diagram above for  
Complete the vent pipe installation to the  
water heater’s vent connector fitting on the  
water heater vent collar outlet. Support  
Notice: Follow vent  
manufacturer’s installation  
instructions and their  
recommended clearances to  
combustibles as required.  
proper vent terminal height.  
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).  
Vertical  
Te rmination  
Adapter  
Storm  
Collar  
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.  
Air Intake  
Adjustable  
Roof  
Flashing  
Roof Jack  
3“/ 5” Concentric Pipe  
Firestop  
Support  
Clamp  
Follow the vent manufacturer’s recommended  
installation instructions provided with the  
vent purchased from the manufacturer.  
Chase Requires  
6" (15 cm) Clearance  
to Combustibles  
1/4" per foot upward slope  
1" (2.5 cm) Clearance  
Firestop  
Support  
Hanger  
2'  
(61 cm)  
Max  
Condensate  
Tr ap  
To Drain. Dispose of  
condensate in accordance  
to local codes  
Vent  
Adapter  
Detail of  
condensate trap.  
Standard Vertical Vent Termination  
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Mounting the Water Heater  
Make sure the location of the appliance allows lower bracket to the wall (Left and Right).  
CAUTION:  
for easy access and operation.  
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).  
1/8" (.32 cm)  
Clearance  
Wood  
Screw  
Upper Bracket  
Washer  
In case of dry wall or concrete wall, use  
drywall anchors or lag bolts.  
Wood  
Screw  
TOP  
The water heater requires 120VAC/60Hz.  
Have a receptacle with ground terminal near  
the water heater. The length of the power  
supply cord is 6 feet (1.8 m).  
Adjustment Screws  
Bracket  
Washer  
Wood  
Screw  
Lower Bracket  
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.  
The image above may differ  
in appearance from your  
water heater.  
Adjustment Screws  
BOTTOM  
Bracket  
The image above may differ in appearance  
from your water heater.  
Using a wood screw and a washer, affix the  
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  
Water Supply Connections  
IMPORTANT: Do not  
apply heat to the HOT or  
COLD water connections. If  
sweat connections are used,  
sweat tubing to adapter  
before fitting adapter to  
the water connections on  
heater. Any heat applied  
to the water supply fittings  
will permanently damage  
the internal components  
of the water heater.  
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”.  
● 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:  
Notice: Due to cold  
enviroments, ice may  
potentially accumulate at  
the water connections. In  
this case, please insert the  
power cord of the water  
heater into an electrical  
outlet. The ice should melt  
withing approximately 10  
minutes and at this time the  
water connections can be  
made.  
● 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  
15  
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Installing the water heater:  
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  
hot water outlet as shown on the water  
heater. If reversed, the water heater will  
not function.  
CAUTION: This water  
heater must only be used with  
the following water supply  
system conditions:  
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 22.  
● Local codes shall govern the exact type  
of pipe material to be used for water  
connections.  
Water Filter  
● To conserve energy and minimize heat  
loss, insulation of hot water piping is  
recommended (see Hot and Cold Pipe  
Insulation Installation on page 23).  
Clean the  
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 flow rate of hot water  
may vary when more than two faucets  
(appliances, fixtures, etc.) are being used  
simultaneously.  
It is not recommended to use pipes with  
smaller diameters than the water supply  
connection of the water heater.  
Water  
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).  
Notice: Use only teflon tape on  
cold and hot water connections and  
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.  
lines.  
Hot  
Water  
Tap  
Drain Valve  
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.  
16  
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Relief Valve  
A new pressure relief valve, complying  
with the Standard for Relief Valves and  
Automatic Gas Shut-Off Devices for Hot  
Water Supply Systems, ANSI Z21.22/  
CSA 4.4, must be installed at the hot water  
outlet connection of the water heater at  
the time of installation. Local codes shall  
govern the installation of relief valves.  
● The 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.  
Drain Valve  
shown on  
right without  
tubing.  
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.  
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.  
Pressure  
Relief  
Valve  
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.  
● 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  
Discharge  
Line  
Hot Water  
Supply  
Outlet  
Drain  
Tube to  
suitable  
drain  
The vinyl tubing as shown is supplied 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.  
Cold  
Water  
Supply  
Inlet  
● Hot and cold water lines should be  
insulated up to the water heater. Refer  
to page 23 for details.  
Notice: The above illustrates  
a pressure-only relief valve. If  
● The discharge line must be  
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.  
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.  
17  
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Installing the Main Remote Control:  
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  
A sediment trap should be installed at the  
Valve must be installed at the gas connection of bottom of the gas line.  
the water heater at the time of installation (see  
Do not use excessive force (over 31.5 ft lbs.  
Manual  
Gas  
diagram to the left).  
[42.7 Nm]) in tightening the pipe, particularly if  
teflon pipe compound is used, as the unit may  
be damaged.  
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.  
Shutoff  
(Valve)  
The inlet gas pressure to the water heater must  
not exceed 10.5” w.c. (2.6 kPa) for natural or  
14” w.c. (3.5 kPa) for LP gas. For purposes  
of input adjustment, the minimum inlet gas  
pressure (with main burner on) is shown on  
the water heater rating plate. If high or low gas  
pressures are present, contact your gas supplier  
for correction.  
A ground joint union or ANSI design certified  
semi-rigid or flexible gas 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  
If flexible connectors are used, the maximum  
length shall not exceed 36” (91 cm).  
NOTICE: To ensure proper operation of the  
heater the gas pipe and gas meter must be sized  
correctly.  
Sediment Trap  
Cap  
If lever type gas shut offs are used, they shall  
be T-Handle type.  
Gas piping shall be in accordance with local,  
utility company 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.  
Compound used on the threaded joints of the  
gas piping must be of the type resistant to the  
action of LP gas. Use compound sparingly on  
male threads only.  
Leak Testing  
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.  
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.  
Use a soapy water solution to test for  
Pressure Testing the Gas Supply System  
WARNING: Install a gas  
pressure regulator, in the  
gas supply line, which does  
not exceed the maximum  
supply pressure.  
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]).  
DO NOT use an industrial  
type gas regulator.  
High Altitude  
Do not install this water heater at eleva-  
tions above 3,280 feet (1,000 m) without  
the proper adjustement. Please contact  
your installer, local gas supplier, place of  
purchase or the Customer Service phone  
number as listed in this Use & Care Manu-  
al for more information.  
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, contact a quaili-  
fied service technician to make the proper  
altitude adjustment. See page 35 for ad-  
ditional information.  
18  
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WARNING: Field wiring connections and electrical grounding must comply with local codes, or in  
the absence of local codes, with the latest edition of the National Electrical Code, ANSI/NFPA 70, or  
in Canada, Canadian Electrical Code, CSA C22.1 Part 1.  
Remote Control Installation  
One (1) remote control is provided with the  
water heater. 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 the MAIN  
(UMC-117) remote control.  
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 water heater.  
NOTICE: An optional  
cable (EZ Link Cable™)  
can be purchased  
separately to manifold two  
heaters together.  
No other manufacturer’s controls are  
suitable for use with this water heater.  
DO NOT attempt to disassemble the  
remote control.  
● Avoid areas where the remote control may  
be exposed to heat, e.g. ranges or heaters.  
● 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  
qualified Technician  
85°F (29°C)  
°F  
Adjustment  
PO  
WE  
ON/OF R  
F
100°F–120°F  
(38°C)–(49°C)  
Optional (Sold  
Separately)  
Mounting Screw x 2  
BATH 2  
MAIN  
Control screw  
qualified Technician  
85°F (29°C)  
Adjustment  
NOTICE: If a manifold system is installed,  
the main remote control connected to the  
manifold controller (MIC-180) has priority  
over the remote controls connected to the  
water heater.  
100°F–120°F  
(38°C)–(49°C)  
Factory Default  
UMC-117  
85°F (29°C)  
125°F–140°F  
(52°C)–(60°C)  
qualified Technician  
Adjustment  
MIC-180  
Manifold  
System  
Optional (Sold  
Separately)  
Manifold  
System  
19  
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Installing the Main Remote Control:  
WARNING: Field wiring connections and electrical grounding must comply with local codes, or  
in the absence of local codes, with the latest edition of the National Electrical Code, ANSI/NFPA 70,  
or in Canada, Canadian Electrical Code, CSA C22.1 Part 1.  
Remote Control Installation  
NOTICE: Extension cable  
Connecting the MAIN (UMC-117 ) remote  
control to the water heater:  
Connecting the remote control to the water  
heater:  
can be any Type-T 18 AWG  
wire similar to a thermostat  
wire and need not be  
● Drill a 1” (2.5 cm) to 1-1/2” (3.8 cm) hole  
● Ensure that the power to the water heater  
at the proposed control location.  
has been disconnected.  
polarity sensitive.  
● Install the extension cable between the  
location of the remote control and the  
water heater.  
● Loose the 3 screws located on the remote  
control connection cover made of white  
plastic (see the diagram on the left top).  
Do Not apply sealant to the  
remote control cable.  
● Remove the base plate from the control.  
● Connect the remote control extension  
cables from the remote control with the  
remote control connection terminals (see  
the diagram on the left bottom).  
It is not recommended to  
have wiring exposed.  
● Feed the remote control extension cable  
through the central hole in the base plate.  
● Fix the base plate to the wall using  
suitable screws and wall anchors.  
Ensure the projections on the base  
plate are pointing upward.  
NOTICE: The remote control wire  
connection terminals are not polarity  
sensitive.  
● Firmly tighten the terminal screws.  
● Connect the remote control cables to the  
extension cable from the water heater.  
● Secure the remote control extension cable  
on the hook located on the side of the  
remote control connection base.  
● Place the remote control over the  
base plate. Ensure the projections in  
the base plate fit into the housings in  
the remote control.  
Remote Control  
● Tighten the 3 screws and attach the remote  
control connection cover to the water  
heater.  
Connection Cover  
Gas Valve  
● Fix the control to the base plate at the  
bottom of the remote control using the  
screw provided.  
● Switch on the power supply to the water  
heater.  
● Proceed to “Connecting the remote  
control to the water heater”, to complete  
installation.  
● Ensure proper operation of the remote  
Remote  
Control  
Connection  
Terminals  
control and water heater.  
Projections  
Remote  
Control  
Extension  
Cable  
W a ll  
Penetration  
Remote Control  
Connection Cable  
Suitable  
W a ll Anchors  
Control  
Screw  
Base Plate  
Screws  
20  
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WARNING: Field wiring connections and electrical grounding must comply with local codes, or  
in the absence of local codes, with the latest edition of the National Electrical Code, ANSI/NFPA 70,  
or in Canada, Canadian Electrical Code, CSA C22.1 Part 1.  
Electrical Connection  
HARDWIRING  
THE ELECTRICAL CONNECTIONS:  
POWER CORD:  
WARNING: Shock  
hazard line voltage is  
● The electric power supply requirement  
for this water heater is 120 VAC/60HZ,  
2 Amps.  
● Wiring should be carried out by a qualified  
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.  
electrician in accordance with local codes.  
● The water heater requires 120 VAC/60Hz and  
● The water heater comes with a three (3) pin  
power supply cord. 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 GFCI (Ground Fault  
Circuit Interrupter) is recommended.  
CAUTION: Label  
all wires prior to  
● Keep any excess of the power supply cord  
on the outside of the water heater.  
disconnection when  
● An ON/OFF switch must be provided and  
● If local codes require hardwiring, see  
instructions for “Hardwiring the Electrical  
Connections”.  
servicing controls. Wiring  
errors can cause improper  
and dangerous operation.  
Verify correct operation  
after servicing.  
installed for the incoming 120VAC power.  
● 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 enclosure  
for a grounding connection.  
● Connect the live wire to black leg wire and  
the neutral wire to the white neutral wire.  
CONNECTOR FOR CHECKING  
THERMOELECTROMOTIVE FORCE  
WIRING DIAGRAM  
COLOR CODE  
R:RED  
ON  
THERMOCOUPLE  
DIP  
W
W:WHITE  
SWITCH1  
R
OFF  
5
BR:BROWN  
BK:BLACK  
BL:BLUE  
FAN  
1
1
2
2
3
3
4
FM  
MOTOR  
ON  
DIP  
R
BK  
W
Y
BL  
SWITCH2  
GY:GRAY  
OFF  
G
4
SW2  
G:GREEN  
6 5 4 3 2  
1
2
2
SW1  
SW3  
O:ORANGE  
Y:YELLOW  
G/Y:GREEN/YELLOW  
Q1 P 1  
G/Y  
SOLENOID  
VALVE 3  
GND  
MIN  
MAX  
ADJUSTER  
SV3  
SV2  
SV1  
SV0  
BUTTON BUTTON BUTTON  
CIRCUIT  
BK  
BK  
SOLENOID  
VALVE 2  
R4  
BOARD  
AMBIENT  
THERMISTOR  
AIR  
M
FLAME ROD1  
W
SOLENOID  
LED  
4 3 2  
1
BK  
BK  
VALVE 1  
R3  
R2  
WATER  
THERMISTOR  
F
A
INLET  
BK  
GAS INLET  
SOLENOID  
VALVE 0  
5
4
3
2
1
BK BL  
USUALLY  
DISCONNECTED  
(
)
PROGRAM  
CHIP  
6 5 4  
HEAT  
W
W
BK  
3 2 1 K  
EXCHANGER  
THERMISTOR  
R
BK  
RESISTOR  
W
Y
BK  
R1  
OUTLET  
7
6
5
4
3
2
1
BL  
HOT WATER  
THERMISTOR  
W
Y
-
P.G.F.R  
PSV  
R
VALVE  
IG  
BK  
BK  
BK  
R
C
ELECTRODE  
WATER BY-PASS  
WATER VOLUME  
B
IGNITER  
9
8
GY GY  
CONTROL MOTOR  
CONTROL MOTOR  
8
BK  
BK  
LIMITER  
LIMITER  
MOTOR  
MOTOR  
4 13 H  
U
7
R
7
6
5
4
3
2
1
R
G
R
G
6
2
2
ANTI-FROST  
HEATER  
5
Y
Y
1 4  
BK  
R
G
Y
BL  
O
W
BR  
BK  
R
G
Y
BL  
O
W
BR  
W
W
BL  
BL  
3 3  
2 2  
1 1  
W
W
O
O
W
W
8
8
BR  
BR  
S
BK  
BK  
BWK  
D
E
BL  
BL  
AC  
G/YorG  
W
120V  
W
FUSE(3A)  
J
I
GND  
MAIN  
BATH  
BATH  
REMOTE  
REMOTE  
REMOTE  
CONTROL  
CONTROL1  
(USC1-117)  
CONTROL2  
BR  
BK  
R
WATER  
FLOW  
(UMC-117)  
(USC2-117)  
OVER HEAT  
LIMITER  
W
W
SENSOR  
31-92028 0  
21  
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Installing the water heater:  
Typical Installation of Water Heater  
(Venting Required)  
Outside Wall  
7/8” Per Foot Downward Pitch  
94° Elbow  
Vent Termination  
With Protective  
Screen  
Wall Plate  
Vent Adapter  
Outside Wall  
Manual  
Gas Supply Line  
Shut-off  
Drain  
Valve  
Water Filter  
To Hot Water  
Faucet(s)  
Va lve  
Manual Gas  
Appliance  
Shut-off  
(supplied)  
Relief  
Va lve  
Check  
Va lve  
Union  
Union  
Cold Water  
Supply  
Shut-of  
Va lve  
Sediment  
Trap  
Power  
Supply  
Cord  
Cap  
Drain Valve  
Drain  
Hose  
(To Suitable Drain)  
6” (15 cm) Air Gap  
Alternate Water Piping Arrangement  
with Optional Valve Kit  
Discharge  
Line  
Hot Water Service  
Valve  
Va cuum Relief Va lve  
(Not Supplied)  
PRIORITY  
Cold Water  
¥ F  
Service Valve  
POWER  
ON/OFF  
Pressure Relief  
Valve  
If required, install per local codes  
and valve manufacturer’s  
instructions.  
Drain  
Water  
Outlet  
Remote  
Control  
Water Inlet  
NOTICE: The National Fuel Gas Code (NFGC) and B149 mandates a manual gas shut-off valve: See  
NFGC/B149 for complete instructions. Local codes or plumbing authority requirements may vary from  
the instructions or diagrams provided and take precedent over these instructions.  
22  
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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 manufacturer’s  
instructions included  
with the kit must be  
carefully followed.  
CAUTION: If local codes require the  
application of an external insulation  
blanket to this water heater, pay careful  
attention to the following so as not to  
restrict the proper function and operation  
of the water heater:  
The manufacturer’s warranty does not cover  
any damage or defect caused by installation,  
attachment or use of any type of energy  
saving or other 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  
WARNING: In case  
the pipe insulation is  
not rated for the  
Hot Water Service  
Valve  
Cold Water  
Service Valve  
appropriate weather  
conditions install  
Pressure Relief  
Valve  
Pipe Insulation  
electric heat tracing or  
equivalent to prevent  
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.  
Water Inlet  
Drain Water  
Outlet  
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  
❑ Do follow all installation instructions  
meter and gas piping are adequately sized.  
covered in this manual.  
❑ Do use teflon tape on water line  
❑ 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 (CSA 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  
(CSA B149 in Canada).  
connections and fittings.  
Don’ts  
❑ Don’t block or restrict Air Intake  
Openings.  
❑ 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.  
23  
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Installing the water heater:  
Installation Check List  
A. Indoor Water Heater Location  
❑
❑
Approved pipe joint compound used.  
❑
❑
❑
❑
Close to area of vent termination.  
Soap and water solution used to check all connections  
and fittings for possible gas leak.  
Indoors and protected from freezing temperatures.  
Proper clearance from combustible surfaces observed.  
❑
Gas Company inspected installation (if required).  
Sufficient fresh air supply for proper operation of  
water heater.  
D. 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.  
E. Co-Axial Venting  
❑
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.  
❑
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 13 and 14.  
❑
Water heater is properly attached to the wall.  
B. Water Supply  
❑
❑
❑
❑
❑
❑
Water supply has sufficient pressure.  
❑
Connector(s) securely fastened together with high  
temperature silicone (500°F [260°C]) and  
air-tight.  
Air purged from water heater and piping.  
Water connections tight and free of leaks.  
Water filter is clean and in place.  
❑
❑
❑
❑
All co-axial vent runs are properly supported.  
Vent terminal is properly installed.  
Materials used are as instructed in this manual.  
Sufficient combustion air is available.  
Water pipes are insulated and protected from  
freezing.  
Maximum and minimum vent lengths are observed.  
C. Gas Supply  
F. Electrical Wiring  
❑
❑
❑
Gas type matches rating plate.  
❑
❑
❑
Voltage matches rating plate.  
Gas supply pressure is sufficient for the water heater.  
Water heater is properly grounded.  
Gas line equipped with shut-off valve, union and  
sediment trap.  
Supply cord and/or wiring meets all local codes.  
24  
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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.  
25  
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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  
26  
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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.  
control(s) should be used.  
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.  
The factory setting of the remote control  
temperature range is between 100°F (38°C)  
and 120°F (49°C).  
Always supervise young children or others  
who are incapacitated.  
The remote control is factory preset to 100°F  
(38°C). To turn the remote control ON or  
OFF, press the POWER button.  
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.  
To adjust the temperature to a required setting,  
press the UP arrow temperature button.  
Pressing the UP or DOWN temperature  
adjustment buttons will change the  
temperature set point.  
!
WARNING: Should overheating  
occur or the gas supply fail to shut off,  
turn off the manual gas control valve  
to the appliance.  
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.  
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.  
Notice: The factory setting allows operating  
temperatures between 100°F (38°C) and  
120°F (49°C). Temperatures of 85°F (29°C)  
and above 120°F (49°C) can be achieved  
with the MAIN (UMC-117) remote control.  
Temperatures of 85°F (29°C) can be  
achieved with the Bath (USC-117 or  
USC2-117) remote control. Only qualified  
service personnel should perform this  
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.  
adjustment. Only factory authorized remote  
Priority Indicator  
In Use Indicator  
(Lit during operation)  
PRIORITY  
Temperature  
Adjustment  
Buttons  
LED Display  
(Displays water  
temperature and error  
Notice: Display shows  
°F only.  
°F  
codes)  
ON/OFF  
POWER  
ON/OFF  
Indicator  
Higher (Hotter)  
Lower (Cooler)  
85 100 102 104 106 108 110 112 114 116 118 120* 125 130 135 140 °F  
29 38 39 40 41 42 43 44 46 47 48 49* 52 54 57 60 °C  
* Temperatures 85°F (29°C) and above 120°F (49°C) can be achieved with the  
MAIN (UMC-117) remote control. See page 34 and 35 for maximum and  
minimum temperature adjustment.  
27  
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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 18 of this  
manual for instructions on leak testing.  
!
DANGER: Hotter water  
increases the potential for  
Hot Water Scalds.  
The 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  
by turning on a hot water faucet.  
Rapid closing of faucets or solenoid  
valves in automatic water using appliances  
can cause a banging noise heard in a  
water pipe. Strategically located risers in  
the water pipe system or water hammer  
arresting devices can be used to minimize  
the problem.  
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  
components.  
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  
heater.  
control by using a damp soft cloth with  
a few drops of mild detergent and gently  
wiping the surfaces of the unit. Wipe any  
remaining moisture with a dry soft cloth.  
● Drain heater. See “Draining The  
Water Heater” section on page 30.  
● Unscrew the water filter, and slide the  
!
DANGER: Combustible  
filter out.  
To ensure sufficient ventilation and  
combustion air supply, proper clearances  
must be maintained.  
materials, such as clothing,  
cleaning materials or  
flammable liquids, etc.,  
must not be placed against or  
next to the water heater.  
● 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 water filters should be cleaned on a  
monthly basis.  
● Turn the electrical power supply and  
cold water supply ON to the water  
heater.  
28  
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Housekeeping, continued  
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.  
● Use only mild soapy water; other  
cleaners may damage the surface of  
the water heater.  
● DO NOT scrub the appliance with a  
● DO NOT remove any label including the  
brush.  
rating plate while cleaning or servicing.  
● DO NOT splash water on the remote  
controls when cleaning.  
Venting System Inspection  
The venting system of a direct vent 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 9 for vent sealing  
instructions.  
DO NOT operate the unit if vent system  
It is recommended that qualified service  
personnel familiar with Category III venting  
inspect the venting system.  
shows signs of leaking exhaust.  
Check to make sure that the air intake and  
vent outlet on the termination has not been  
blocked or contain debris.  
Check vent connection joint sections with a  
solution of soapy water to assure air-tightness  
while the unit is operating.  
Burner Sight  
Glass  
Burner Inspection  
Visually inspect the main burners annually.  
!
CAUTION: For your safety, burner  
inspection and cleaning should be  
performed only by qualified service  
personnel.  
Through the front sight glass, inspect the  
burner flame. Blue flames should be seen  
when the main burner is firing. See the figure  
on the 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.  
Vacation and Extended Shut-Down  
NOTICE: Refer to the  
Freeze Protection Section  
on page 30.  
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.  
Ensure that condensate is disposed of per  
local codes and regulations.  
!
CAUTION: Do not  
operate without the  
condensate trap connected  
to the vent and routed to  
the proper drain.  
29  
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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.  
Turn off the switch on the remote control.  
PRIORITY  
¾
F
POWER  
ON/OFF  
T
o put the water heater back into operation  
Close the gas shut-off valve(s).  
after draining, follow the steps below.  
Unplug the power supply cord (or  
disconnect breaker) at least 10 seconds  
after step #1.  
Reinstall the drain plug and water filter.  
Close the hot water outlet drain valve.  
To Hot  
Water  
Faucet(s)  
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.  
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  
Drain Hose  
(To Suitable  
Drain)  
NOTICE: The water heater may not  
operate unless the above procedure is  
followed correctly.  
Draining the water heater  
WARNING: Failure to  
follow these instructions  
while draining the water  
heater can cause serious  
damage to the water heater  
as well as personal injury,  
including scalding.  
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  
The kit includes two full port isolation valves,  
one for the cold side and one for the hot side.  
Hot Water Service Valve  
Pressure Relief Valve  
CAUTION: Even when  
drained 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.  
protect piping and valves. Therefore, piping  
and valves should be wrapped with insulation  
material as instructed on page 23.  
WARNING: Failure  
to drain the water heater  
can cause serious  
damage to the wate  
heater as well as  
pearsonal injury..  
Another method of freeze prevention is by  
running a small volume of water. Running  
water will protect the water heater, piping  
and valves.  
Exposure to freezing conditions can occur  
from down draft of venting system or from  
installation in areas exposed to cold air.  
Follow the steps below to ensure proper water  
flow through the water heater and piping:  
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 -30°F (-34°C) (without wind  
conditions).  
NOTICE: DO NOT  
unplug the electric  
power supply cord for  
freeze protection.  
Turn off the switch on the remote control.  
Close the gas shut-off valve.  
Open the hot water faucet slightly until a  
stream of approximately 1/8” (.32 cm) is  
flowing. Be sure to check the flow  
periodically.  
30  
This device only protects the internal  
components of the water heater. It does NOT  
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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.  
● Reverse water connections.  
Water not hot enough.  
● Increase the temperature setting.  
The gas valve is not fully opened.  
Gas supply pressure is low.  
● 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.  
31  
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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  
● 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.  
again.  
● 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  
12  
The Gas Shutoff Valve is not opened  
completely.  
● Open the Gas Shutoff Valve  
completely.  
Gas Service has been interrupted.  
● Contact Gas Utility Company.  
● Fill up LP Gas container or replace  
LP Gas is running low. (LP models only)  
The hot water faucet is not opened enough.  
with a new cylinder of LP Gas.  
15  
05  
● Open the faucet more to secure  
enough volume.  
Air intake or vent termination may be  
blocked.  
● Remove any obstructions on the air  
(Every 60 seconds you hear  
an alarm or when the faucet is  
closed, the alarm stops.)  
intake or vent termination.  
The vent pipes on the concentric vent  
termination may not be connected properly.  
● Contact a dealer for service.  
● Contact a dealer for service.  
● Contact a dealer for service.  
13  
If the error code is still displayed after taking  
the above steps.  
1L  
Water heater has build up of lime deposits.  
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.  
32  
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Replacement Parts:  
Direct Vent Water Heater  
Instructions For Placing a Parts Order  
Address parts orders to the distributor or store  
where the water heater was purchased.  
WARNING: For your  
safety, DO NOT attempt  
to disassemble this unit for  
any reason.  
Part description (as noted below) and  
number of parts desired.  
All parts orders should include:  
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.  
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.  
Front View  
Unit Cover Panel  
Side View  
Heat  
Transfer  
Pipe  
Film  
Type  
OHL  
Electrode  
Burner  
Assy.  
Heat  
Exchanger  
Assy.  
Flame  
Rod  
Ignitor  
Blower  
Motor  
Circuit  
Board  
Gas Valve  
Assy.  
Hot Water  
Outlet  
Cold Water  
Supply  
Gas Supply  
Water Flow  
Solenoid  
Drain Plug  
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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  
Maximum Temperature Adjustment by the  
Main Remote Control (UMC-117)  
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  
Required adjustment for up to 140°F (60°C) water  
temperature settings  
!
WARNING: Refer to scald potential warnings on  
page 4 before making adjustment. Changing this  
setting is done at your own risk.  
155°F (68°C)  
Table courtesy of Shriners Burn Institute  
DO NOT execute the following adjustment 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.  
See steps below to LIMIT maximum water  
temperature setting to 120°F (49°C).  
Turn on the remote control. Turn off the gas and  
water shutoff valves.  
Turn on the remote control. Turn off the gas and  
water shutoff valves.  
●
●
Press the UP arrow temperature adjustment  
button on the remote control for several times and  
set the temperature at 120°F (49°C).  
●
●
●
● Press the Down arrow temperature adjustment  
button on the remote control for several times and  
set the minimum setting temperature (100°F(38°F)  
or 85°F(29°F)).  
Press and hold the UP button on remote control  
for more than 5 seconds. Number (120) on the  
display of the remote control will begin to blink.  
● Press and hold the Down button on the remote  
control for more than 5 seconds. Number on the  
display of the remote control will begin to blink.  
While the number is blinking, push the UP arrow  
temperature adjustment button and the Down  
arrow temperature adjustment button at the same  
time. The display of the remote control will show  
“140”.  
● While the number is blinking, push the Down arrow  
temperature adjustment button and the UP arrow  
temperature adjustment button at the same time.  
Number of the display of the remote control will stop  
blinking.  
Push the UP or Down button to set desired  
temperature.  
●
● Push the UP or Down button to set desired  
Turn on the gas and water shut off valves.  
temperature.  
●
●
Check and ensure safe operation and performance  
of the water heater.  
● Turn on the gas and water shut off valves.  
● Check and ensure safe operation and performance  
of the water heater.  
Priority Indicator  
In Use Indicator  
(Lit during operation)  
Notice: Display shows  
°F only.  
PRIORITY  
Temperature  
LED Display  
(Displays water  
temperature and error  
codes)  
Adjustment  
Buttons  
°F  
ON/OFF  
POWER  
ON/OFF  
Indicator  
Higher (Hotter)  
Lower (Cooler)  
85 100 102 104 106 108 110 112 114 116 118 120* 125 130 135 140 °F  
29 38 39 40 41 42 43 44 46 47 48 49* 52 54 57 60 °C  
34  
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The content on this page is intended for use by qualified  
installation/service personnel ONLY.  
High Altitude DIP Switch Adjustment  
For High Altitude Installation above 3,280  
Feet (1,000m):  
When the water heater is installed above 3,280 feet  
(1,000m), the adjustment of DIP switch is required for  
high altitude installation.  
Without adjusting the DIP switch, the water heater  
may not function properly.  
WARNING: Improper adjustment, altera-  
tion, service or maintenance can cause prop-  
erty damage, personal injury, or death.  
Minimum Temperature Adjustment by the  
Main Remote Control (UMC-117, USC1-117  
and USC2-117)  
Required adjustment for 85°F (29°C) water  
temperature setting.  
NOTICE: If the water heater is installed less than  
3,280 feet (1,000m), no action is required.  
Follow the instruction below if it is determined that a  
setting of 85°F (29°C) is required.  
How to adjust the DIP switch on the PCB for high  
altitude installation:  
● Turn on the remote control. Turn off the gas and  
water shutoff valves.  
● Check the altitude (above sea level) where the  
water heater is installed.  
● Press the Down arrow temperature adjustment but-  
ton on the remote control for several times and set  
the temperature at 100°F (38°C).  
● Press the Down button on remote control 3 times  
within 5 seconds. The display of the remote con-  
trol will show “85”.  
● Turn on the gas and water shut off valves.  
● Check and ensure safe operation and performance  
of the water heater.  
● If the altitude is more than 3,280 feet (1,000m),  
the adjustment of DIP switch is required.  
● Turn off the gas shut off valve and water shutoff  
valve.  
● Remove the front cover.  
● Find the two DIP switches located at the top right  
hand side of the PCB. The switch labeled "DIP 2"  
is the bottom switch.  
● Change the DIP switch #3 setting of DIP 2 to  
“ON” position if the water heater is installed  
above 3,280 feet (1,000m) below 6,560 feet  
(2,000m). See the diagram below. DO NOT alter  
any other DIP Switch.  
NOTICE: The maximum flow rate at 85°F (29°C) is  
1.3 gpm (5.0 l/m).  
● Change the DIP switch #4 setting of DIP 2 to  
“ON” position if the water heater is installed  
above 6,560 feet (2,000m) below 9,840 feet  
(3,000m). See the diagram below. DO NOT alter  
any other DIP Switch.  
NOTICE: Manifold pressure will be reduced by  
this adjustement.  
ON  
2
3
4
1
● Attach the unit’s front cover.  
● Turn on the gas shutoff valve and water shutoff  
valve.  
2
3
4
1
DIP  
Switches  
● Check and ensure safe operation and performance  
of the water heater.  
ON  
ON  
ON  
2
3
4
PCB  
1
2
3
4
2
3
4
1
1
Dip switch adjustment  
3,280 feet (1,000m)  
thru  
As set from factory  
Dip switch adjustment  
6,560 feet (2,000m)  
thru  
6,560 feet (2,000m)  
9,840 feet (3,000m)  
Location of DIP Switches on PC Board.  
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  
or equipment. The sign shall read, in print size no less than one-half (1/2) inch in size,  
"GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS".  
4.00 and 5.00 for installation of through – the – wall vented gas appliances as follows:  
5.08: Modifications to NFPA-54, Chapter 10  
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.  
(1) Revise NFPA-54 section 10.5.4.2 by adding a second exception as follows:  
Existing chimneys shall be permitted to have their use continued when a gas conversion  
burner is installed, and shall be equipped with a manually reset device that will  
automatically shut off the gas to the burner in the event of a sustained back-draft.  
(b) EXEMPTIONS: The following equipment is exempt from 248 CMR 5.08(2)(a)1  
through 4:  
(2) Revise 10.8.3 by adding the following additional requirements:  
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  
(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:  
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. 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  
1. Detailed instructions for the installation of the venting system design or the venting  
system components; and  
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:  
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.  
1. The referenced "special venting system" instructions shall be included with the  
appliance or equipment installation instructions; and  
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.  
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.  
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.  
(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.  
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  
36  
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