Rheem Water Heater AP15317 User Guide
Use Care Manual  
With nstallation nstructions or the nstaller  
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.  
Rheem/ Ecosense  
RTG-95DV ((NP)  
ECO200DV ((NP) 3  
RTG-68DV((NP)  
ECO160DV((NP)3  
RTG-38DV((NP)  
ECO150DV((NP)3  
Paloma/Wai Wela  
PH2-26RDVV ((NP)  
PH2-25RDVV ((NP)  
PH2-20RDVV ((NP)  
Ruud  
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.  
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.  
RUTG-95DV ((NP)  
RUTG-68DV ((NP)  
RUTG-38DV ((NP)  
Richmond  
Do not destroy this manual. Please read carefully and keep in a safe  
place for future reference.  
RMTG 95DV ((NP)  
RMTG 68DV ((NP)  
RMTG 38DV ((NP)  
Rheem/Ruud  
Recognize this symbol as an indication of Important Safety  
Information!  
!
GT-200 DV ((NP)  
GT-160 DV ((NP)  
California Proposition 65 Warning: This product contains  
chemicals known to the State of California to cause cancer, birth  
defects or other reproductive harm.  
!
WARNING: If the information in these instructions is not followed exactly,  
a fire or explosion may result, causing property damage, personal injury or death.  
!
FOR YOUR SAFETY!  
!
G If you cannot reach your gas supplier, call  
the fire department.  
— 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.  
G Do not return to your home until authorized  
by the gas supplier or fire department.  
— Improper installation, adjustment,  
alteration, service or maintenance can cause  
property damage, personal injury or death.  
Refer to this manual. Installation and service  
must be performed by a qualified installer,  
service agency or the gas supplier.  
— WHAT TO DO IF YOU SMELL GAS  
G Do not try to light any appliance.  
G Do not touch any electrical switch; do not  
use any phone in your building.  
G Immediately call your gas supplier  
from a neighbor’s phone. Follow the  
gas supplier’s instructions.  
S
I
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N
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31-93361-00  
CERTIFIED  
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AP15317 (10/09)  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd  
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11/9/2009 3:10:22 PM  
IMPORTA(T SAFETY I(FORMATIO(.  
READ ALL I(STRUCTIO(S BEFORE USI(G.  
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.  
DA(GER!  
I(STALL A(D PROPERLY VE(T 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 concentric 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 concentric  
vent system inspection.  
WAR(I(G!  
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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AP15317 (10_09) DV Gas Manual 10 30 09.indd  
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11/9/2009 3:10:23 PM  
IMPORTA(T SAFETY I(FORMATIO(  
READ ALL I(STRUCTIO(S BEFORE USI(G.  
!
DA(GER!  
WATER TEMPERATURE SETTI(G  
Safety and energy conservation are factors to be considered when selecting the water  
temperature setting of a water heater’s remote control. Water temperatures above  
125°F (52°C) can cause severe burns or death from scalding. Be sure to read and follow  
the warnings outlined on the label pictured below.  
Time/Temperature Relationship in Scalds  
!
D A N G E R  
Water Temperature  
Time To Produce a Serious Burn  
120°F (49°C)  
125°F (52°C)  
More than 5 minutes  
11/2 to 2 minutes  
130°F (54°C)  
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)  
HOT  
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.  
BURN  
!
DANGER: Households with small children, disabled  
or elderly persons may require a 120°F (49°C) or lower  
temperature setting to prevent contact with “HOT” water.  
Water temperature over 125°  
F
can  
cause severe burns  
Maximum water temperature occurs while burner is on.  
To find water temperature being deliveredN turn on a hot  
water faucet and place a thermometer in the water stream  
and read the thermometer. (See page 23 27 for more  
details.)  
death from scalds.  
instantly or  
Children, disabled and elderly are  
at highest risk of being scalded.  
See instruction manual before  
setting temperature at water  
heater.  
Feel water before bathing or  
showering.  
The temperature of the water at the outlet of the water  
heater can be regulated by setting the temperature on  
Remote Control. The remote control was set at 100°F  
(36°C) before it was shipped from the factory.  
Temperature limiting valves are  
available, see manual.  
The diagram to the bottom left illustrates the Remote  
Control and how to adjust the water temperature.  
Notice: The factory setting allows operating temperatures  
between 100°F (36°C) and 120°F (89°C). Temperatures  
of 65°F (29°C) and up to 180°F (30°C) can be achieved  
with the MAI( (UMC-117) remote control. Temperatures  
of 65°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:  
PRIORITY  
Display  
shows  
°F only.  
°F  
POWER  
ON/OFF  
Notice: When this water heater is supplying general  
purpose hot water requirements for use by individualsN  
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 HCooerr  
LCwer (CCoerr  
025 011 041 °F  
85 011 012 014 014 018 001 002 004 004 008 0210  
18 14 41 40 42 41 44 44 4  48 440  
52 54 41 °(  
29  
* Temperatures 65°F(29°C) and up to 180°F (30°C) can be  
achieved with the Main (UMC-117) remote control. See page  
38 35 for minimum and maximum temperature adjustment.  
8
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AP15317 (10_09) DV Gas Manual 10 30 09.indd  
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11/9/2009 3:10:23 PM  
DA(GER!  
(ATURAL GAS A(D 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:  
G Do not attempt to find the cause yourself.  
G Do not try to light any appliance.  
G 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.  
G Do not touch any electrical switch.  
G Do not use any phone in your building.  
G 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.  
G Leave the building immediately and make  
sure your family and pets leave also.  
G Leave the doors open for ventilation and  
contact the gas supplier, a qualified service  
agency or the fire department.  
G 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.  
G 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.  
G 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.  
G 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.  
G 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.  
G 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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AP15317 (10_09) DV Gas Manual 10 30 09.indd  
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11/9/2009 3:10:23 PM  
IMPORTA(T SAFETY I(FORMATIO(  
READ ALL I(STRUCTIO(S BEFORE USI(G.  
!
WAR(I(G!  
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 I(STALLATIO(S I( THE STATE OF CALIFOR(IA  
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 PRECAUTIO(S  
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.  
G Read this manual entirely before installing  
G 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.  
G Use this appliance only for its intended  
purpose as described in this Use and Care  
Manual.  
G Be sure your appliance is properly installed  
in accordance with local codes and the  
provided installation instructions.  
READ A(D FOLLOW THIS SAFETY I(FORMATIO( CAREFULLY.  
SAVE THESE I(STRUCTIO(S  
3
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AP15317 (10_09) DV Gas Manual 10 30 09.indd  
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11/9/2009 3:10:24 PM  
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.  
G The water heater should be installed with  
the proper venting materials and termination  
suitable for Category III venting or Rheem  
approved venting.  
G 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 to a safe location be  
installed under the water heater.  
G 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.  
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  
gasolineN LP gas (butane or propane)N paint  
or adhesives and their thinnersN solvents  
or removers.  
!
WARNING:  
G Long hot water lines should be insulated to  
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.  
conserve water and energy.  
G The water heater and water lines should  
be protected from exposure to freezing  
temperatures.  
Because of natural air movement in a room or  
other enclosed spaceN 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 burnsN death or property  
damage.  
G Do not install the water heater in  
bathroomsN bedroomsN any occupied rooms  
normally kept closedN or in outdoor areas.  
G Do not install water heater where subject  
to vibrations.  
G Do not install the water heater in  
Recreational VehiclesN Mobile HomesN  
Boats and other Watercrafts.  
Minimum Clearance from  
Combustible and  
(on-Combustible  
Construction.  
The water heater must be located so it is not  
subject to physical damageN for exampleN by  
moving vehiclesN area floodingN freezingN etc.  
G Do not install the water heater near vents  
for heating or cooling. A minimum of 8 feet  
(1.2 m) should be maintained.  
0” (Zero)  
(0 cm)  
If the water heater is installed in a garageN it  
should be installed so that the direct ignition  
system and main burner are no less than 16  
inches (85 cm) above the garage floor.  
G Minimum water heater clearance from  
combustible and non-combustible  
0” (Zero)  
(0 cm)  
construction is 1/2” (1.3 cm) sidesN 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 (28” [31 cm] from front and top is  
recommended for servicing purposes).  
Raising the gas fired water heater will reduce  
BUT (OT eliminate the possibility of lighting  
the vapor of any flammable liquids which may  
be improperly stored or accidentally spilled.  
1/2” (min)  
(1.3 cm)  
1/2” (min)  
(1.3 cm)  
12” (min)  
(30 cm)  
(24” (61cm) minimum is  
recommended for service)  
Top = 12" (30 cm)  
Bottom = 12" (30 cm)  
G 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.  
G Maintain a minimum clearance of  
0” (0 cm) around the concentric vent  
pipe to combustible or non-combustible  
constructionN unless otherwise specified  
by vent manufacturer or installed in an  
enclosed space. If the clearances stated on  
the Instruction/Warning LabelN located on  
the front panel of the heater differN install  
the water heater according  
Front = 12" (30 cm) Back = 0"*  
Side = 1/2" (1.3 cm) Concentric Vent = 0"  
* (with support bracket)  
to the clearances stated on the label.  
7
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AP15317 (10_09) DV Gas Manual 10 30 09.indd  
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11/9/2009 3:10:24 PM  
Installing the water heater:  
NOTICE: The water heater  
Corrosive Atmospheres  
should not be installed near  
an air supply containing  
halogenated hydrocarbons  
and/or other corrosives.  
The air in beauty shopsN dry cleaning  
establishmentsN photo processing labsN  
and storage areas for liquid and powdered  
bleaches or swimming pool chemicals  
often contains such halogenated  
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.  
hydrocarbons and/or corrosives.  
An air supply containing halogenated  
hydrocarbons may be safe to breatheN  
but when it passes through a gas flameN  
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).  
Certificate of  
Limited  
Warranty  
PRIORITY  
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YEAR HEA EXCHANGER AND  
YEAR ARTS LIMITED ARRANTY  
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Rem-ue C-nur-l  
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W
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Residenuial  
Tankless WaueGrasHeauers  
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  
explain the features, operation, safety precautions, maintenance and  
troubleshooting of the water heater This manual also includes parts  
list.  
,
to  
.
a
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.  
Do not destroy this manual. Please read carefully and keep in  
place for future reference.  
a
safe  
Recognize this symbol as an indication of Important Safety  
ormation!  
!
!
California Proposition 65 Warning: This product contains  
chemicals known to the State of California to cause cancer birth  
,
defects or other reproductive harm.  
W
ARNING: If the information in these instructions is not followed exactly,  
!
a
fire or explosion may result causing property damage, personal injury or death.  
!
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  
G
G
—
If you cannot reach your gas supplier call  
the fire department.  
,
Do not return to your home until authorized  
by the gas supplier or fire department.  
any other appliance.  
explosion or fire.  
T
o
do so may result in an  
Improper installation, adjustment,  
—
WHAT  
TO DO IF YOU SMELL GAS  
alteration, service or maintenance can cause  
property damage, personal injury, or death  
Refer to this manual. Installation and service  
.
G
G
Do not try to light any appliance.  
Do not touch any electrical switch; do not  
use any phone in your building.  
must be performed by  
a
qualified installer,  
service agency or the gas supplier  
.
G
Immediately call your gas supplier from  
neighbor’ phone. Follow the gas  
supplier’ instructions.  
a
s
s
S
I
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N
Printed in USA  
Tankless Uniu  
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Use & Care Manual  
Manual Appliance  
Gas Suut-ff Valve  
Rem-ue C-nur-l Cable  
Pressure Relief Valve  
(some models only)  
6
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AP15317 (10_09) DV Gas Manual 10 30 09.indd  
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11/9/2009 3:10:25 PM  
The water heater must be installed with a 3”/5” diameter UL approved Category III Concentric Stainless  
Steel appliance concentric vent pipe or Rheem approved concentric vent pipe.  
Venting  
DANGER: Failure to  
Notes on pre-existing vent:  
The installation of venting must comply  
with national codesN 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,  
serious injury, explosion,  
or fire. To avoid the risk  
of fire, explosion, or  
If the water heater is being installed as a  
replacement for an existing water heaterN a  
thorough inspection of the existing venting  
and air intake system must be performed  
prior to any installation work. Verify that the  
correct materialsN 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 fracturesN 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 foundN they must be  
corrected in accordance with the venting  
instructions in this manual before completing  
the installation and putting the water heater  
into service.  
The 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.  
All concentric vent components (adaptersN  
pipeN elbowsN terminalsN etc.) should be  
Rheem approved Stainless Steel Venting  
Material  
asphyxiation from carbon  
monoxide, NEVER operate the  
water heater unless it is  
(e.g. AL29-8C).  
properly vented and has  
The specified vent termination must be used.  
(Refer to pages 13 and 18 for an example of  
the concentric vent.)  
Use the screws provided to connect  
the concentric vent pipe with the anti-  
adequate air supply for proper  
operation as outlined in the  
Venting section of this manual.  
WARNING: Use only 3”/5” disconnection joint.  
UL approved Category III  
Concentric Stainless Steel vent  
material or Rheem approved  
concentric vent material. No  
other vent material is  
The unit can be vented either horizontally  
or vertically.  
Concentric vent pipe runs must be  
adequately supported along both horizontal  
and vertical runs.  
The maximum recommended unsupported  
span should be no more than five (5) feet  
(1.5 m). Support isolation hanging bands  
should be used. DO NOT use wire. (See  
diagram)  
See the back page of this manual  
for additional requirements for the  
Commonwealth of Massachusetts.  
NO!  
YES!  
permitted.  
WARNING: Follow  
concentric vent  
manufacturer’s installation  
instructions and their  
recommended clearances to  
combustibles.  
Venting Lengths  
MAXIMUM VENT LENGTH:  
installing the drain tube to the condensation  
trap. For horizontal installation with less  
than 10’ (3.1m)N a 98° elbow is required.  
(umber of  
90° elbows  
(bends)  
Maximum  
Length of  
Straight Pipe  
The system will not operate if there is  
excessive restriction (pressure drop) in the  
venting system. A maximum 39’(12.0 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 37’ 3"(11.5 m)N three elbows can be used side wall (Total equivalent vent length: 30”  
with 33’ (11.0 m) or four elbows can be used (73cm)).  
MINIMUM VENT LENGTH: The venting  
may be as short as 12” (30cm)N in addition  
to installation of one 98° elbow and one  
vent termination to the outdoors through a  
1
2
3
8
39’  
(12.0 m)  
37' 3"  
(11.5 m)  
33"  
(11.0 m)  
with 38’ 3" (10.5 m) of vent pipe. (See table)  
Notice: Make sure that the seam of the inner  
vent pipe in horizontal runs is toward the top  
of the installation (see diagram).  
38' 3"  
(10.5 m)  
A 98° elbow is equivalent to 1’3” (.5 m) of  
straight pipe. A 85° elbow is equivalent to  
9” (.25 m) of straight pipe.  
5
33'  
(10.0 m)  
The vent termination does not count  
in equivalent to pipe calculation when  
determining total vent lengths.  
3
31'3"  
(9.5 m)  
The vent should be installed with a slight  
downward slope of 1/8” per foot of  
Vent Seam  
horizontal run toward the vent terminal (see  
diagram). This ensures that any condensate  
formed during operation of the unit is  
evacuated from the appliance and to prevent  
rain from entering the appliance.  
An upward slope toward the vent terminal is  
not acceptable for horizontal venting without  
9
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AP15317 (10_09) DV Gas Manual 10 30 09.indd  
9
11/9/2009 3:10:25 PM  
Installing the water heater:  
Venting Through Closed Spaces  
Follow local codes and vent manufacturer’s installation instructions.  
1/4" per foot  
Wall Plates  
downward slope  
For maintenance and inspection purposes two (2) inspection access  
panels large enough to allow access for venting inspection may be  
required. One (1) of these access panels should be close to where the  
concentric vent pipe enters the ceiling. The other access panel should  
be near the vent termination.  
94° Elbow  
Fire  
Stop  
Vent Pipe  
12” (min)  
(30 cm)  
Ceiling  
Board  
Inspection  
Inspection  
Access  
Access Panel #1  
(optional)  
Panel #2  
(optional)  
Appliance Vent Adapter  
Metal Fab Inc.N standard concentric vent pipe  
can be installed into the water heater collar  
without an appliance vent adapter. HoweverN  
other Rheem approved vent manufacturer pipe  
cannot be installed without a UL approved  
Category III Stainless Steel appliance  
concentric vent adapter.  
(otice: To install the appliance vent adapterN  
please follow the appliance vent adapter  
manufacturer’s instructions.  
Draining the Condensate  
Provision should be made to collect and  
dispose of condensate from venting systems.  
CAUTION: Condensate  
is known to be acidic; refer  
to local, state (provincial)  
or federal codes for proper  
handling and discharge  
methods.  
When a water heater is vented vertically, an  
UPWARD slope must always be used. See the  
diagram on page 18 showing UPWARD slope  
for vertically vented water heaters.  
When a water heater is vented horizontally,  
the vent pipe can have a DOW(WARD or  
UPWARD slope towards the termination. If an  
UPWARD slope is usedN always attach a drain  
hose to the drain fitting and plumb the hose to  
a sanitary sewer drain.  
Always attach a drain hose to the drain fitting  
and plumb the hose to a sanitary sewer drain.  
CAUTION: Condensate  
must drain away from the  
water heater and should  
not be allowed to enter the  
water heater.  
A high temperature silicone tubing suitable for  
use with acidic condensate and appropriate for  
the temperature range should be used.  
See Examples A and B on pages 13 and 18  
for DOW(WARD and UPWARD slope for  
horizontally vented water heaters.  
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. (see diagram)  
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  
water heater.  
0XVWꢀEHꢀ¿OOHGꢀZLWKꢀZDWHUꢀWRꢀSUHYHQWꢀ  
gasses from backing into building  
WARNING: If the  
condensate collector is not  
used, the drain fitting must  
be capped to prevent  
exhaust gases and  
condensate from entering  
the building. The cap is  
supplied on the water  
heater.  
Condensate Drain Line  
(to suitable drain)  
10  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 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 gradeN verandaN  
porchN 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.  
3 inches (15 cm) for appliances <  
10N000 Btuh (3 kW)N 9 inches (23 cm)  
for appliances > 10N000 Btuh (3kW)  
and < 50N000 Btuh (15kW)N 12 inches  
(30 cm) for appliances > 50N000 Btuh  
(15kW).  
3 inches (15 cm) for appliances < 10N000  
Btuh (3 kW)N 12 inches (30 cm) for  
appliances > 10N000 Btuh (3kW) and <  
100N000 Btuh (30kW)N 33 inches (91 cm)  
for appliances > 100N000 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 (31 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  
(8.57 m) above the meter/regulator  
assembly.  
*
*
I = Clearance to service regulator  
concentric vent outlet.  
3 feet (91 cm)  
J = Clearance to nonmechanical air  
supply inlet to the combustion  
air inlet to any building or other  
appliance.  
3 inches (15 cm) for appliances <  
10N000 Btuh (3 kW)N 12 inches (30 cm)  
for appliances > 10N000 Btuh (3kW)  
and < 100N000 Btuh (30kW)N 33 inches  
(91 cm) for appliances > 100N000 Btuh  
(30kW).  
3 inches (15 cm) for appliances < 10N000  
Btuh (3 kW)N 9 inches (23 cm) for  
appliances > 10N000 Btuh (3kW) and <  
50N000 Btuh (15kW)N 12 inches (30 cm)  
for appliances > 50N000 Btuh (15kW).  
3 feet (91 cm) above if within 10 feet  
(3 m) horizontally.  
K = Clearance to mechanical air supply  
inlet.  
3 feet (1.63 m)  
L = Clearance above paved sidewalk or  
paved driveway located on public  
property.  
7 feet (2.13 m)†  
*
M = Clearance under verandaN porchN  
deck or balcony.  
(ot Allowed  
(ot Allowed  
1
2
†
In accordance with current CSA-B189.1 Installation Codes.  
In accordance with current A(SI Z223.1/ (FPA 58 (ational 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 A(SI 223.1/(FPA 58 or CSA-B189.12N one of the following shall be indicated:  
a)  
b)  
A minmum clearance value determined by testing in accordance with section 2.20N 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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AP15317 (10_09) DV Gas Manual 10 30 09.indd 11  
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Installing the water heater:  
Additional Considerations  
Indoor Water Heater  
Do (OT install vent terminal under any patio or deck.  
To help prevent moisture from freezing on walls and under  
eavesN 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 freezingN do not locate vent  
terminal on the side of a building with prevailing winter winds.  
If soffit vent is too closeN  
block off and install new  
vent at another location.  
3’  
(1.6 m)  
Do (OT 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  
3’ (1.6 m)  
Caulk  
zone or to edge of window  
etc.Nstarting within 3’ (1.6 m).  
Corner  
3’ (1.6 m)  
Caulk Zone  
Caulk  
Do (ot locate vent terminal too close to shrubberyN as flue gases  
may damage them.  
RTV silicone caulk  
1 ft. sq. (30 x 30 cm) sheet metal plate on  
brick or masonry surfaceN recommended.  
8’  
(1.2 m)  
Caulk all cracksN seams and joints within six (3) feet (1.6 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.  
Do (OT extend exposed vent pipe of indoor water heaters outside  
of building.  
Guard vent against accidental contact with people and pets.  
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.  
12  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 12  
11/9/2009 3:10:25 PM  
Installing the water heater:  
Horizontal Vent Installation continued.  
Determine the heater location and  
wall construction for correct screw  
and anchor selection. If mounting on  
drywall/wallboard it is recommended to  
locate the wall studs and secure a 1/2 or  
3/8" plywood backing plate to the wall  
studs.  
Dry fit the entire vent system from the  
heater to the vent termination including  
the wall plates. Make any corrections if  
any vent adjustments are required.  
Interior Wall  
Exterior Wa  
Wall Plate  
Disconnect the venting and reassemble  
according to the vent manufactures  
recommendations. When fully engaged  
at the seams the female end will  
overlap the male end a minimum 1  
inch (25.8mm). Use three self tapping  
screws at each outer pipe seam. Seal  
each overlapping area of the outer pipe  
with silicone if required by the vent  
manufacture.  
94° Elbow  
Use 8 hollow wall anchorsN at least  
1/6 inch (0.32 cm) in diameter and of  
appropriate length for the sheathing or  
other composite material.  
Condensate  
Drain Line  
Connection  
Horizon  
Termin  
Caulk for  
Weather Seal  
Water  
Heater  
Use 8 #10x1-1/8” wood screws for  
plywoodN solid wood sheathing or  
members. Use suitable masonry anchors  
for mounting to cement block or solid  
concrete walls.  
Apply silicone sealant/latex caulk around  
the vent section where it passes through  
the wall plate and around the wall plate  
to keep moisture outside the building.  
Mounting  
Brackets  
Temporary hang the heater using the  
top mounting screws secured leaving  
approximately 1/8" (0.38cm) from wall.  
Determine the vent requirements and  
the vent exit point and center mark this  
location. If the heater is below the vent  
exit remove it from the wall and place it  
in a safe area while the vent opening is  
made.  
Side View  
Maintain vent clearances and install  
vent supports as required by the vent  
manufacturer.  
WARNING: Use  
Support method used should maintain  
clearance and isolate the vent pipe from  
floor joist or other structural members  
to help prevent the transmission of noise  
and vibration.  
Rheem approved Category  
III vent material only. No  
other vent material is  
permitted.  
Create a 3" diameter hole to allow  
the vent to pass without deformation  
or resistance. Clean debris from the  
opening and hang the heater and secure  
all four mounting screws.  
CAUTION: Refer to the  
vent manufacturer’s  
installation instructions as  
design might vary from  
manufacturer to  
manufacturer.  
1/4" per foot  
Wall Plates  
downward slope  
94° Elbow  
Fire  
Stop  
Vent Pipe  
12” (min)  
(30 cm)  
Ceiling  
Board  
Inspection  
Access Panel #1  
(optional)  
Inspection  
Access  
Panel #2  
(optional)  
Example A: Typical Horizontal Termination  
w/ 1/4” per foot DOWNWARD Slope  
13  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 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.  
Maximum twenty-four (28) inches (30 cm) above roof level  
without additional support for vent.  
Vent Pipe  
Through Roof  
Four (8) feet (1.2 m) from any gableN dormer or other  
roof structure with building interior access (i.e.N ventN  
windowN etc.).  
Min. 12" (30 cm) Above Roof 1  
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 Anticipated Snow Level.  
Max. 28" (30 cm) Above Roof (Without Additional Support)  
2
1 Min. 16" (83 cm) Above Roof for installations in Canada.  
For installations in Canada 16" (85.7 cm).  
3 For installations in Canada 3' (1.6 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  
required air space clearance to combustible  
materials and building insulation.  
vertical or horizontal runs as previously  
mentioned. If requiredN 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  
determinedN 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  
required 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 (31 cm) higher than any portion of the  
building within 10 feet (3 m).  
Vertical  
Termination  
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/ceilingN another means of support must  
be used at a second location.  
Air Intake  
Adjustable  
Roof  
Flashing  
3“/ 5” Concentric Pipe  
Support  
Firestop/Support Plate  
Clamp  
Follow the vent manufacturer’s recommended  
installation instructions provided with the  
vent purchased from the manufacturer.  
Chase Requires  
0" (0 cm) Clearance  
to Combustibles  
Concentric  
Vent Pipe has  
0” Clearance  
Requirment  
1/4" per foot upward  
slope on horizontal run  
Firestop  
12” (min)  
(30 cm)  
Support  
Hanger  
Condensate  
Drain Line  
Form a Trap  
in the drain  
line.  
To Drain: Dispose  
of condensate in  
accordance to  
local codes  
Vertical Vent Installation  
with Horizontal offset  
Straight Vertical  
Vent Installation  
Standard Vertical Vent Termination  
18  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 14  
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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. AlternatelyN 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 3/6” (.95 cm)  
to 1-1/2” (3.6 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 wallN use  
drywall anchors or lag bolts.  
Wood  
Screw  
TOP  
The water heater requires 120VAC/30Hz.  
Have a receptacle with ground terminal near  
the water heater. The length of the power  
supply cord is 3 feet (1.6 m).  
Adjustment Screws  
Bracket  
Washer  
Wood  
Screw  
Lower Bracket  
Install a wood screw for the upper bracket  
with a clearance of 1/6” (.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 washerN 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 heaterN 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 contractorN  
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  
increasesN 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 (18 psi [97 kPa]) + Pipe  
Pressure Loss + Faucet and Shower  
Pressure Loss + Safety Margin (more than 5  
psi [38 kPa]).  
Use approved plumbing materials only.  
To allow the full flow capacityN it is  
recommended to keep water inlet and outlet  
pipes to no less than 3/8” diameter.  
G To supply hot water to upper floorsN  
additional water pressure (0.88 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 freezingN  
insulate both cold and hot water supply  
lines. DO (OT cover the drain or pressure  
relief valve.  
Notice: Due to cold  
To ensure proper operation of the water heaterN  
the following water pressure guidelines should  
be followed:  
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.  
G Well water systems should be set to ensure  
a minimum system pressure of 80 psi (273  
kPa). The pressure should remain stable  
during the operation of the water heater.  
G Operation of the water heater requires the  
minimum water pressure of 18 psi (97 kPa)  
and a minimum water flow rate of 0.33 gpm  
(2.5 lpm).  
G When the water is supplied from a water  
supply tankN 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.  
G A water pressure of 80 psi (273 kPa) is  
required to achieve maximum flow rate.  
G To maintain proper performanceN ensure  
sufficient water supply pressure. The  
15  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 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 highN 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 reversedN 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 linesN so that the  
water heater may disconnect easily for  
servicingN if necessary.  
G With clean, potable water  
free of corrosive chemicals,  
sand, dirt or other  
Notice: If using mixing valves on the  
outletN choose one that prevents cold  
water pressure from overcoming hot water  
line pressure.  
contaminates.  
G 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.  
It is recommended to install a Check  
Valve between the water heater and the  
water shutoff valveN if either a thermal  
expansion tank or a backflow prevention  
device is not installed.  
G With recommended water  
quality (see chart bellow).  
The following should be addressed in  
regards to the HOT WATER OUTLET:  
G DO NOT reverse the hot  
and cold water connections.  
The water heater will  
not operate.  
Alternate Water Piping Arrangement  
with Optional Valve Kit  
G Connections between the water heater  
and point(s) of use should be as short  
and direct as possible.  
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 valvesN one for the cold  
side and one for the hot side. Refer to  
page 22.  
Water Filter  
G Local codes shall govern the exact type  
of pipe material to be used for water  
connections.  
Clean the  
Water Filter  
Water Inlet  
G To conserve energy and minimize heat  
lossN insulation of hot water piping is  
recommended (see Hot and Cold Pipe  
Insulation Installation on page 23).  
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  
(appliancesN fixturesN 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: Use only teflon tape on  
cold and hot water connections and  
lines.  
Before connecting the water supply pipe  
to the water heaterN open the shutoff valve  
and clean out sandN debrisN airN caulking  
materialN etc. inside the pipe. Connect to  
the water inletN then check water flow.  
Close the shutoff valve and clean the  
water filter.  
Notice: The pipes MUST be completely  
drainable. If the hot water faucets are  
located at a point higher than the water  
heaterN place a drain valve at the lowest  
point (see diagram at the left).  
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.  
Chart for Recommended Water Quality Levels  
TDS (Total  
Free Carbon  
Total  
pH  
Aluminum Chlorides  
Copper  
Iron  
Manganese  
Zinc  
Dissolved Solids) Dioxide (CO2) Hardness  
Up to 200 Up to 0.2 Up to 200 Up to 1.0 Up to 0.3 Up to 0.05 Up to 1.0  
6.5 to 8.5 Up to 500 mg/L Up to 15mg/L  
mg/L  
mg/L  
mg/L  
mg/L  
mg/L  
mg/L  
mg/L  
13  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 16  
11/9/2009 3:10:28 PM  
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.  
G The end of the discharge line should not  
be threaded or concealed and should be  
protected from freezing. (o valve of any  
typeN 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 installedN the manufacturer recommends  
a type 80XL Watts T P relief valve or an  
equivalent model be used.  
For safe operation of the water heaterN be  
sure that:  
Drain  
Valve  
G The pressure rating of the relief valve  
must not exceed 150 psi (1038 kPa)N the  
maximum working pressure of the water  
heater as marked on the rating plate.  
Pressure  
Relief  
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.  
Valve  
G 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  
G (o 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 periodicallyN a problem exists and  
service to the water system is required.  
G Discharge from the relief valve should  
be piped to a suitable drain to eliminate  
potential water damage. Piping used should  
be of a type approved for the distribution of  
hot water.  
Relief  
Valve  
Hot Water  
Supply  
Drain  
Tube to  
suitable  
drain  
Discharge  
Line  
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  
Outlet  
G 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  
G The discharge line must be  
local codes require a combination  
temperature and pressure relief  
valve be installedN an extension  
piece may be needed to ensure that  
the valve probe is not directly in  
the flow path of the water.  
(O 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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AP15317 (10_09) DV Gas Manual 10 30 09.indd 17  
11/9/2009 3:10:28 PM  
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  
Supply  
Line  
Shutoff  
(Valve)  
diagram to the left).  
[82.7 (m]) in tightening the pipeN particularly if  
teflon pipe compound is usedN as the unit may  
be damaged.  
The branch gas supply line to the water heater  
should be a minimum of 3/8” black steel pipe  
or other approved gas piping material.  
The inlet gas pressure to the water heater must  
not exceed 10.5” w.c. (2.3 kPa) for natural or  
18” w.c. (3.5 kPa) for LP gas. For purposes  
of input adjustmentN the minimum inlet gas  
pressure (with main burner on) is shown on  
the water heater rating plate. If high or low gas  
pressures are presentN contact your gas supplier  
for correction.  
A ground joint union or A(SI design certified  
semi-rigid or flexible gas appliance connector  
should be installed in the gas line close to the  
water heater. The (ational Fuel Gas Code  
((FGC) A(SI Z223.1 and CA( B189 code  
mandates a manual gas shut-off valve: See  
(FGC B189 for complete instructions.  
Manual Gas  
Appliance  
Shutoff  
(Supplied)  
Union  
If flexible connectors are usedN the maximum  
length shall not exceed 33” (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 usedN they shall  
be approved / certified gas cocks.  
Gas piping shall be in accordance with localN  
utility company requirement and/or in the  
absence of local codesN use the latest edition of  
the (ational Fuel Gas Code. In CanadaN the latest  
edition of CSA B189.1 (atural 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 (18” 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 (18” 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 3N260 feet (1000 m) above sea level.  
The input rating of this water heater is based  
on sea level operation. At higher elevationsN  
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.  
16  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 18  
11/9/2009 3:10:29 PM  
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: The provided  
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.  
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.  
G Avoid areas where chemical agents (such  
as thinnerN benzine and alkalines) are used.  
The following are considerations for  
determining the location of the remote  
control(s):  
G Avoid areas of direct sunlight.  
G The MAXIMUM distance between the water  
heater and the remote control installation  
location is limited to 195 feet (59 m) of wire.  
G 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.  
G
G
Place remote control out of children’s reach.  
NOTICE: An optional  
cable (EZ Link Cable™)  
can be purchased  
separately to manifold two  
heaters together.  
The remote control can be installed in  
convenient locations such as the kitchenN  
laundry roomN utility roomN or directly beside  
the water heater.  
No other manufacturer’s controls are  
suitable for use with this water heater.  
DO NOT attempt to disassemble the  
remote control.  
G Avoid areas where the remote control may  
be exposed to heatN e.g. ranges or heaters.  
G Avoid areas where the remote control  
Remote  
Control  
Model  
Remote  
Control  
Description  
Temperature  
Set Point  
Range  
Base Plate  
Availability  
MAIN  
Control  
Number  
100°F–120°F  
(36°C)–(89°C)  
PRIORITY  
Factory Default  
°F  
UMC-117  
USC1-117  
MAI(  
PO  
WE  
ON/OF R  
F
Qualified Technician  
Adjustment for  
65°F (29°C)  
125°F–180°F  
(52°C)–(30°C)  
Mounting Screw x 2  
Residential Products  
Control screw  
100°F–120°F  
(36°C)–(89°C)  
Optional (Sold  
Separately)  
(OTICE: If a manifold system is installedN  
the main remote control connected to the  
manifold controller has priority over the re-  
mote controls connected to the water heater.  
BATH 1  
Qualified Technician  
Adjustment  
65°F (29°C)  
100°F–120°F  
(36°C)–(89°C)  
Optional (Sold  
Separately)  
(OTICE: A commercial conversion kit can  
be purchased separately to achieve tempera-  
tures up to 165° F (65° C).  
USC2-117  
BATH 2  
Qualified Technician  
Adjustment  
65°F (29°C)  
MIC-3  
MIC-160 or  
MIC-165  
Manifold  
System  
Manifold  
System  
Optional (Sold  
Separately)  
19  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 19  
11/9/2009 3:10:29 PM  
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  
Connecting the MAIN (UMC-117 ) remote  
control to the water heater:  
Connecting the remote control to the water  
heater:  
NOTICE: Remote control  
cable is included in the  
carton. The remote control  
cable is not polarity sensitive.  
G Drill a 1” (2.5 cm) to 1-1/2” (3.6 cm) hole  
G Ensure that the power to the water heater  
at the proposed control location.  
has been disconnected.  
G Install the remote control cable between the G Loose the 1 screw located on the remote  
Do Not apply sealant to the  
remote control cable.  
location of the remote control and the  
water heater.  
control connection cover made of white  
plastic (see the diagram on the left top).  
G Remove the base plate from the control.  
G Connect the remote control cable 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.  
G Feed the remote control cable through the  
central hole in the base plate.  
Use only 18 AWG thermostat  
wire.  
G 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 connection  
terminals are not polarity sensitive.  
Do not use network cable,  
telephone phone wire or any  
twisted pair cable.  
G Firmly tighten the terminal screws.  
G Place the remote control over the  
base plate. Ensure the projections in  
the base plate fit into the housings in  
the remote control.  
G Secure the remote control cable on the  
hook located on the side of the remote  
control connection base.  
G Tighten the 1 screw and attach the remote  
control connection cover to the water  
heater.  
G Fix the control to the base plate at the  
bottom of the remote control using the  
screw provided.  
G Switch on the power supply to the water  
G Proceed to “Connecting the remote  
control to the water heater”N to complete  
installation.  
heater.  
G Ensure proper operation of the remote  
Remote Control  
Connection Cover  
control and water heater.  
Gas Inlet  
Valve  
Remote  
Control  
Connection  
Terminals  
Projections  
Remote Control  
Cable  
Remote  
Control  
Remote Control  
Wall  
Cable  
Penetration  
Suitable  
Wall Anchors  
Control  
Screw  
Base Plate  
Screws  
20  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 20  
11/9/2009 3:10:30 PM  
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  
G The electric power supply requirement  
for this water heater is 120 VAC/30HZN  
2 Amps.  
G 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.  
G The water heater requires 120 VAC/30Hz and  
G 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.  
G DO (OT connect grounding wire to water  
pipesN gas pipesN telephone cablesN lightning  
conductor circuits and to grounding circuit  
of other equipment that carry a ground-fault  
interrupter.  
G The installation of an GFCI (Ground Fault  
Circuit Interrupter) is recommended.  
CAUTION: Label  
all wires prior to  
G Keep any excess of the power supply cord  
on the outside of the water heater.  
disconnection when  
G An O(/OFF switch must be provided and  
G If local codes require hardwiringN 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.  
G Wire the water heater exactly as shown  
below. A wiring diagram is also found  
inside of the cover panel.  
(OTICE: Do not connect power until  
venting installation is complete. (See Venting  
installation pages 9-18.)  
G A green screw is provided in the enclosure  
for a grounding connection.  
(OTICE: Wait ninety (90) seconds after  
power connected for the first time to initiate  
operation of the water heater.  
G Connect the live wire to black leg wire and  
the neutral wire to the white neutral wire.  
COLOR CODE  
ON  
WIRING DIAGRAM  
SCHÉMA DE CÂBLAGE  
FAN MOTOR  
CODE DE COULEUR  
MARCHE  
R:RED,ROUGE  
W:WHITE,BLANC  
BR:BROWN,BRUN  
BK:BLACK,NOIR  
BL:BLUE,BLEU  
DIP SWITCH 1  
CONTACTEUR DIP 1  
OFF  
1
1
2
2
3
3
4
4
ARRÉT  
5
ON  
FM  
MARCHE  
MOTEUR DU  
VENTILATEUR  
FOR INDOOR,DIRECT-VENT  
GY:GRAY,GRIS  
MODEL ONLY  
DIP SWITCH 2  
CONTACTEUR DIP 2  
G:GREEN,VERT  
R
BK  
Y
BL  
OFF  
W
BL WR O Y  
POUR MODÈLE INTÉRIEUR À  
O:ORANGE,ORANGE  
ÉVENT DIRECT SEULEMENT  
ARRÉT  
SW2  
FOR DIRECT-VENT MODEL ONLY  
Y:YELLOW,JAUNE  
POUR MODÈLE À ÉVENT DIRECT SEULEMENT  
SW1  
SW3  
G
G/Y:GREEN/YELLOW,  
VERT/JAUNE  
FLAME ROD 1  
6 5 4 3 2  
1
SOLENOID VALVE 4  
SV4  
MIN BUTTON  
MAX BUTTON  
ADJUSTER BUTTON  
ÉLECTROVALVE 4  
ÉLECTRODE DE  
BOUTON MIN. BOUTON MAX.  
BOUTON DE RÉGLAGE  
R4  
R3  
R2  
AMBIENT AIR  
THERMISTOR  
THERMISTOR  
D'AIR AMBIANT  
BK  
DÉTECTION  
GND  
SOLENOID VALVE 3  
ÉLECTROVALVE 3  
DE FLAMME 1  
SV3  
SV2  
SV1  
SV0  
CIRCUIT BOARD  
W
T
FLAME ROD 3  
SOLENOID VALVE 2  
ÉLECTROVALVE 2  
PLAQUE DE CIRCUIT  
BK  
BK  
WATER INLET  
M
THERMISTOR  
BL  
ÉLECTRODE DE  
THERMISTOR  
DÉTECTION  
LED  
BK  
4 3 2  
1
SOLENOID VALVE 1  
ÉLECTROVALVE 1  
A
DE FLAMME 3  
D'ADMISSION D'EAU  
G/Y  
F
5
4
3
2
HEAT EXCHANGER  
GAS TYPE  
BK  
BK  
USUALLY  
THERMISTOR  
CIRCUIT BOARD  
GAS INLET  
BK  
R
8 7 6 5  
DISCONNECTED  
THERMISTOR  
SOLENOID VALVE 0  
PLAQUE DE CIRCUIT  
IMPRIMÉ DE TYPE Â GAZ  
D'ECHANGEUR DE CHALEUR  
NORMALEMENT  
DECONNECTE  
4 3 2 1 K  
ÉLECTROVALVE DANS  
ADMISSION DE GAZ  
W
W
BK  
BK  
1
HOT WATER OUTLET  
R1  
BL  
THERMISTOR  
7
BL  
W
RESISTOR  
THERMISTOR  
GY  
W
Y
6
5
4
3
2
1
RÉSISTANCE  
DE SORTIE D'EAU CHAUDE  
Y
-
PSV  
R
P.G.F.R VALVE  
BK  
BK  
R
IG  
IGNITER  
BK  
WATER BY-PASS CONTROL MOTOR  
WATER VOLUME CONTROL MOTOR  
C
ELECTRODE  
ÉLECTRODE  
ÉLECTROVALVE DE DÉRIVATION D'EAU  
MOTEUR DE CONTRÔLE DU VOLUME D'EAU  
GY GY  
B
9
8
ALLUMEUR  
R
LIMITER  
MOTOR  
LIMITER  
MOTOR  
4
3
1 H  
8
BK  
R
BK  
LIMITEUR  
MOTEUR  
LIMITEUR  
MOTEUR  
U
S
7
6
5
3 3  
2 2  
1 1  
7
6
5
4
3
2
1
R
G
2
G
ANTI-FROST HEATER  
2
W
W
CHAUFFAGE ANTI-GIVRE  
Y
Y
1 4  
BK  
R
G
Y
BL  
O
W
BR  
BK  
R
G
Y
BL  
O
W
BR  
BL  
BL  
W
W
O
O
W
W
8
8
BR  
BR  
BK  
G/YorG  
W
BK  
W
BWK  
AC  
3
BL  
BL  
120V  
2
V
1
FUSE(3A)  
GND  
J
I
MAIN REMOTE  
CONTROL  
BATH REMOTE  
CONTROL 1  
BATH REMOTE  
CONTROL 2  
FUSIBLE(3A)  
TÉLÉCOMMANDE  
<<MAIN>>  
TÉLÉCOMMANDE 1  
<<BATH>>  
TÉLÉCOMMANDE 2  
<<BATH>>  
FOR INDOOR,DIRECT-VENT  
BR  
WATER FLOW SENSOR  
CAPTEUR DE DÉBIT  
D'EAU  
MODEL ONLY  
OVER HEAT LIMITER  
LIMITEUR DE SURCHAUFFE  
W
(UMC-117)  
(USC1-117)  
(USC2-117)  
BK  
R
POUR MODÈLE INTÉRIEUR À  
W
ÉVENT DIRECT SEULEMENT  
31-93618 0  
21  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 21  
11/9/2009 3:10:30 PM  
Installing the water heater:  
Typical Installation of Water Heater  
(Venting Required)  
1/4” Per Foot Downward Pitch  
Wall Plate  
94° Elbow  
Vent Termination  
With Protective  
Screen  
Vent Adapter  
Condensate  
Drain Line  
(to Suitable Drain)  
Outside Wall  
Manual  
Gas Supply Line  
Shut-off  
Va lve  
Drain  
Valve  
Water Filter  
Relief  
Va lve  
Manual Gas  
Appliance  
To Hot Water  
Faucet(s)  
Union  
Shut-off  
(supplied)  
Check  
Va lve  
Union  
Sediment  
Trap  
Cold Water  
Supply  
Shut-of  
Va lve  
Cap  
Drain  
Hose  
(to Suitable Drain)  
6” (15 cm)  
Air Gap  
Power  
Supply  
Cord  
Drain Valve  
Alternate Water Piping Arrangement with  
Optional Valve Kit  
Hot Water  
Service Valve  
Cold Water  
Service Valve  
Pressure  
Relief Valve  
Vacuum Relief Valve  
(Not Supplied)  
PRIORITY  
¥ F  
POWER  
ON/OFF  
Water Inlet  
If required, install per local codes  
and valve manufacturer’s  
Remote  
To Drain  
Water Outlet  
instructions.  
Control  
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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AP15317 (10_09) DV Gas Manual 10 30 09.indd 22  
11/9/2009 3:10:30 PM  
Insulation Blankets  
Insulation blanketsN available to the general  
public for external use on gas water heatersN  
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 installationN  
attachment or use of any type of energy  
saving or other unapproved devices (other  
than those authorized by the manufacturer)  
intoN 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.  
G Do not cover the air inletN 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.  
Hot Water  
Service Valve  
Cold Water  
Service Valve  
Pressure  
Relief Valve  
WARNING: In case  
the pipe insulation is  
not rated for the  
appropriate weather  
conditions install  
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  
To Drain  
Water Outlet  
For increased energy efficiencyN use pipe  
insulation. Please install the insulation  
according to the diagram aboveN 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  
K Do contact local gas company to ensure gas  
K Do follow all installation instructions  
meter and gas piping are adequately sized.  
covered in this manual.  
K Do use teflon tape on water line  
K Do check inlet gas pressure to ensure  
that it is within the range specified on  
the rating plate.  
K Do provide adequate air for combustion  
and ventilation as discussed in the Use  
Care Manual and the (ational Fuel Gas  
Code (CSA B189 in Canada).  
K Do maintain proper clearances to  
combustibles and non-combustibles as  
specified on the nameplate.  
K Do ensure that the venting system complies  
with the guidelines found in the Use  
Care Manual and (ational Fuel Gas Code  
(CSA B189 in Canada).  
connections and fittings.  
Don’ts  
K Don’t block or restrict Air Intake Openings  
on vent termination.  
K Don’t remove the front cover unless  
absolutely necessary. This should only be  
done after being examined by a qualified  
service technician.  
K Don’t install this product where standing  
water may occur.  
K Don’t use pipe dope on water line  
connections and fittings.  
23  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 23  
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Installing the water heater:  
Installation Check List  
A. Indoor Water Heater Location  
K
K
Approved pipe joint compound used.  
K
K
K
K
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.  
K
Gas Company inspected installation (if required).  
Sufficient fresh air supply for proper operation of  
water heater.  
D. Relief Valve  
K
Pressure Relief Valve properly installed and discharge  
line run to open drain.  
K
Air supply free of corrosive elements and  
flammable vapors.  
K
Discharge line protected from freezing.  
K
K
K
Provisions made to protect area from water damage.  
Sufficient room to service heater.  
E. Venting  
K
Vent pipe material should be category III and meet  
water heater manufacturer's requirements.  
Combustible materialsN such as clothingN cleaning  
materialsN ragsN etc. clear of the heater and  
vent piping.  
K
Connector(s) pitched (1/8” per foot of length  
minimum) DOW(WARD or UPWARD to  
termination. See pages 13 and 18.  
K
Water heater is properly attached to the wall.  
B. Water Supply  
K
Connector(s) securely fastened together with high  
temperature silicone (500°F [230°C]) and  
air-tight.  
K
K
K
K
K
K
Water supply has sufficient pressure.  
Air purged from water heater and piping.  
Water connections tight and free of leaks.  
Water filter is clean and in place.  
K
K
K
K
All vent runs are properly supported.  
Vent terminal is properly installed.  
Sufficient combustion air is available.  
Maximum and minimum vent lengths are observed.  
Materials used are as instructed in this manual.  
Water pipes are insulated and protected from  
freezing.  
F. Electrical Wiring  
C. Gas Supply  
K
K
K
Voltage matches rating plate.  
K
K
K
Gas type matches rating plate.  
Water heater is properly grounded.  
Gas supply pressure is sufficient for the water heater.  
Supply cord and/or wiring meets all local codes.  
Gas line equipped with shut-off valveN union and  
sediment trap.  
28  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 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.  
2.Turn off all electric power to the appliance.  
3.Do not attempt to light the burner by hand.  
GAS SHUTOFF  
VALVE  
4.Turn the Gas Shutoff Valve located on the outside of the unit  
OPEN  
CLOSE  
clockwise  
to the "OFF" position.  
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.  
to  
7.Turn on all electric power to the appliance.  
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  
1
2
.
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  
to the "OFF" position.  
25  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 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 overheatingN fireN floodN physical  
damage or if the gas supply fails to shut off.  
Do Not store or use gasoline or other flammable vapors  
and liquidsN such as adhesives or paint thinnerN in vicinity  
of this or any other appliance. If such flammables must  
be usedN open doors and windows for ventilationN and all  
gas burning appliances in the vicinity should be shut off  
including their pilot lightsN 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 newspaperN  
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 sectionN  
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 8 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 (36°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 (89°C)  
125°F (52°C)  
More than 5 minutes  
11/2 to 2 minutes  
130°F (58°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)  
180°F (30°C)  
185°F (33°C)  
150°F (33°C)  
155°F (36°C)  
Table courtesy of Shriners Burn Institute  
23  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 26  
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Water Temperature Setting…  
Maximum water temperature occurs while  
the burner is on. To determine the water  
temperatureN 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.  
adjustment. Only factory authorized remote  
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 (36°C)  
and 120°F (89°C).  
Always supervise young children or others  
who are incapacitated.  
The remote control is factory preset to 100°F  
(36°C). To turn the remote control O( or  
OFFN 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 manualN or contact your dealer.  
To adjust the temperature to a required  
settingN press the UP arrow temperature  
button.  
Pressing the UP or DOW( 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  
(88°C) when a hot water faucet is in the  
open position.  
If the water heater has been subjected to  
fireN floodN physical damageN or has been  
under waterN turn off the manual gas shut-off  
valve(s)N 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 (36°C) and  
120°F (89°C). Temperatures of 65°F (29°C)  
and up to 180°F (30°C) can be achieved  
with the MAI( (UMC-117) remote control.  
Temperatures of 65°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 caseN increase  
the water flow. If water heater still does not  
operate and hot water faucet is completely  
openN increase the temperature setting on the  
remote control.  
Priority Indicator  
In Use Indicator  
(Lit during operation)  
PRIORITY  
LED Display  
(Displays water temperature and error codes)  
Temperature  
Adjustment  
Buttons  
°F  
Notice: Display shows °F only.  
POWER  
O(/OFF  
ON/OFF  
Indicator  
Higher HCooerr  
LCwer (CCoerr  
025 011 041 °F  
85 011 012 014 014 018 001 002 004 004 008 0210  
18 14 41 40 42 41 44 44 4  48 440  
52 54 41 °(  
29  
* Temperatures 65°F (29°C) and up to 180°F (30°C) can be achieved with the MAI(  
(UMC-117) remote control. See page 38 and 35 for maximum and minimum  
temperature adjustment.  
27  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 27  
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Care and cleaning of the water heater:  
Routine Preventative Maintenance  
DANGER: Before  
manually operating the  
Properly maintainedN 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 materialsN gasoline and other  
flammable vapors and liquids.  
It is recommended that a periodic  
inspection of the burnerN relief valveN  
air intake filterN water filter and venting  
system should be made by service  
Ensure the unit has not been damaged.  
If damage or denting is presentN 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 yearN lift and release the  
lever handle on the pressure relief valveN  
located in the hot outlet piping of the  
water heaterN 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 16 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 inspectionN maintenance  
and/or cleaningN 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 heaterN turn the unit off and  
disconnect the power supply.  
HOW TO CLEA( THE WATER FILTER:  
!
DANGER: Shock Hazard  
G 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 dustN  
dirt and lint on a regular basis.  
G 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.  
G Drain heater. See “Draining The  
Water Heater” section on page 30.  
G Unscrew the water filterN and slide the  
!
DANGER: Combustible  
filter out.  
To ensure sufficient ventilation and  
combustion air supplyN 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.  
G 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.  
G To remove severe sediment and dirtN  
use a soft brush and wash with running  
water.  
G Return the filter to the water heater and  
screw in the filter.  
The water filters should be cleaned on a  
monthly basis.  
G Turn the electrical power supply and  
cold water supply O( to the water  
heater.  
26  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 28  
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Housekeeping, continued  
CLEA(I(G THE WATER HEATER A(D  
REMOTE CO(TROL(S):  
G Make sure the unit is OFF and the  
electrical power supply has been  
disconnected.  
G DO NOT remove any label including the  
rating plate while cleaning or servicing.  
G DO NOT splash water on the remote  
G DO NOT scrub the appliance with a  
controls when cleaning.  
brush.  
G Use only mild soapy water; other  
cleaners may damage the surface of  
the water heater.  
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.  
DO NOT operate the unit if vent system  
shows signs of leaking exhaust.  
Check to make sure that the air intake and  
vent outlet on the termination has not been  
blocked or contain debris.  
It is recommended that qualified service  
personnel familiar with Category III venting  
inspect the venting system.  
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 glassN 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 cleaningN a vacuum cleaner can be used  
on the burner.  
If any unusual burner operation is notedN 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 timeN the power and water heater’s operation and controls should be  
to the appliance should be turned off.  
After a long shut-down periodN 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 basisN 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 drain fitting and routed  
to the proper drain.  
29  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 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.  
suitable drain where it will cause no  
damage. Leave water heater as is until next  
use.  
Turn off the switch on the remote control.  
T
o put the water heater back into operation  
PRIORITY  
¥
F
Close the gas shut-off valve(s).  
POWER  
ON/OFF  
after drainingN follow the steps below.  
Unplug the power supply cord (or  
disconnect breaker) at least 10 seconds  
after step #1.  
Reinstall the drain valve and the water  
filter. Close the hot water outlet drain  
valve.  
To Hot  
Water  
Faucet(s)  
Open all hot water faucets. Before  
proceeding to the next stepN make sure that  
COLD water is coming out of all hot water  
faucets.  
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.)  
Close the water shut-off valve.  
Plug into an electrical outletN fully open  
the gas shut-off valve and the water  
shut-off valve.  
Using a suitable container to catch waterN  
remove the water filter and the drain valve  
from heater. Attach a garden hose to the  
drain valve installed in the hot water outlet  
line and direct the stream of water to a  
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 manufacturerN distributor or place  
of purchase. They allow for one person full  
The kit includes two full port isolation valvesN  
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 conditionsN even for a short period of  
timeN be sure to drain all water from the unit  
as instructed above.  
protect piping and valves. ThereforeN 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  
personal injury.  
Another method of freeze prevention is by  
running a small volume of water. Running  
water will protect the water heaterN 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 heaterN it prevents  
freezing inside the water heater down to an  
ambient temperature of approximately  
minus -30°F (-38°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 1/6” (.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 (OT  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 30  
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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  
(ot enough or no hot water.  
Water Shutoff valve is not fully opened.  
G Check shutoff valve and open fully.  
Hot water faucet is not fully opened.  
G Open hot water faucet completely.  
(The main burner goes off  
when incoming water volume is  
inadequate.)  
Water piping is frozen.  
G Allow piping to thaw.  
(o electricity or water supply is cut off.  
G Check that proper power is being  
supplied and/or water supply is  
adequate.  
Unit is not “O(”.  
G Turn the unit “O(” by the button on  
the remote control.  
The temperature may be set too low.  
G Increase the temperature setting.  
Mixing Valve Malfunctions  
(if applicable)  
G Check and replace if necessary.  
Error code displayed on remote control.  
G See instructions for Error Code and if  
requiredN contact a dealer for service.  
(ot enough water demand.  
Water inlet filter clogged.  
Fixture aerator is clogged.  
Scale buildup in heat exchanger.  
G Increase water flow.  
G Clean water inlet filter.  
G Clean aerator.  
G Check for error code. If requiredN  
contact a dealer for service.  
Hot and cold water lines reversed.  
The temperature may be set too low.  
G Reverse water connections.  
Water not hot enough.  
G Increase the temperature setting.  
The gas valve is not fully opened.  
Gas supply pressure is low.  
G Check and open the gas valve fully.  
G Call your gas company to verify the  
gas meter and gas piping size.  
Bleed over in one of the hot water  
fixtures.  
G Call dealer for service.  
Water too hot.  
Temperature is set too high.  
G Decrease the temperature setting.  
Water shutoff valve is not fully opened.  
G Check shutoff valve and open fully.  
Small amount of water has been heated.  
G 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.  
G (ormal 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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AP15317 (10_09) DV Gas Manual 10 30 09.indd 31  
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Error Code Guide:  
When an error code is displayed:  
If the error code is still shown:  
G Close the hot water faucetN turn off the switch on the remote G Turn off the hot water faucet and turn off the switch on the  
control.  
remote control.  
G Wait for about 5 minutes before turning the switch on  
G Take note of the error code displayed and call the customer  
service assistance number in the “If You (eed Service”  
section of the manual on the back cover.  
again.  
G Open the hot water faucet.  
Notice: If an error code other than those listed below is  
displayedN immediately turn off the hot water faucetN take note  
of the error codeN turn off the switch on the remote control and  
call the customer assistance number.  
If the error code remains in the display:  
G Close the hot water faucet and turn off the switch on the  
remote control.  
G 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.  
G Open the Gas Shutoff Valve  
completely.  
Gas Service has been interrupted.  
G Contact Gas Utility Company.  
G 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  
G Open the faucet more to secure  
enough volume.  
Air intake or vent termination may be  
blocked.  
G Remove any obstructions on the air  
(Every 30 seconds you hear  
an alarm or when the faucet is  
closedN the alarm stops.)  
intake or vent termination.  
The vent pipes on the concentric vent  
termination may not be connected properly.  
G Contact a dealer for service.  
G Contact a dealer for service.  
G 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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AP15317 (10_09) DV Gas Manual 10 30 09.indd 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.  
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.  
Part description (as noted below) and  
number of parts desired.  
Front View  
Unit Cover View  
Side View  
Inlet  
Exhaust  
Final Assy  
Film Type OHL  
Heat Transfer Pipe  
Burner Assy.  
Flame Rod  
Heat Exchanger Assy.  
Electrode  
Bypass Pipe  
Ignitor  
Blower Motor  
Circuit Board  
Gas Valve Assy.  
Gas Supply.  
Hot Water Outlet  
Cold Water Supply  
Drain Plug  
Water Flow Solenoid  
33  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 33  
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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 (89°C)  
125°F (52°C)  
130°F (58°C)  
135°F (57°C)  
180°F (30°C)  
185°F (33°C)  
150°F (33°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 for Residential product or 185°  
(85° C).  
!
WARNING: Refer to scald potential warnings on  
page 8 before making adjustment. Changing this  
setting is done at your own risk.  
155°F (36°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.  
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.  
Follow the instructions below if it is determined that a  
setting of up to 140°F (60°C) is required.  
G
Turn on the remote control. Turn off the gas and  
water shutoff valves.  
G Press the Down arrow temperature adjustment  
button on the remote control for several times and  
set the minimum setting temperature (100°F(38°C)  
or 85°F(29°C)).  
G
Press the UP arrow temperature adjustment  
button on the remote control for several times and  
set the temperature at 120°F (49°C).  
G
G
G
G 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.  
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.  
G 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.  
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”.  
G Push the UP or Down button to set desired  
temperature.  
Push the UP or Down button to set desired  
temperature.  
G
G Turn on the gas and water shut off valves.  
Turn on the gas and water shut off valves.  
G Check and ensure safe operation and performance  
G
G
of the water heater.  
Check and ensure safe operation and performance  
of the water heater.  
Priority Indicator  
In Use Indicator  
(Lit during operation)  
PRIORITY  
Temperature  
Adjustment  
Buttons  
LED Display  
(Displays water temperature and error codes)  
°F  
Notice: Display shows °F only.  
POWER  
O(/OFF  
ON/OFF  
Indicator  
Higher HCooerr  
LCwer (CCoerr  
025 011 041 °F  
85 011 012 014 014 018 001 002 004 004 008 0210  
18 14 41 40 42 41 44 44 4  48 440  
52 54 41 °(  
29  
38  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 34  
11/9/2009 3:10:38 PM  
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 3N260 feet  
(1N000m)N the adjustment of DIP switch is required for  
high altitude installation.  
Without adjusting the DIP switchN 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 65°F (29°C) is required.  
How to adjust the DIP switch on the PCB for high  
altitude installation:  
G Turn on the remote control. Turn off the gas and  
water shutoff valves.  
G Check the altitude (above sea level) where the  
water heater is installed.  
G Press the Down arrow temperature adjustment but-  
ton on the remote control for several times and set  
the temperature at 100°F (36°C).  
G Press the Down button on remote control 3 times  
within 5 seconds. The display of the remote con-  
trol will show “65”.  
G Turn on the gas and water shut off valves.  
G Check and ensure safe operation and performance  
of the water heater.  
G If the altitude is more than 3N260 feet (1N000m)N  
the adjustment of DIP switch is required.  
G Turn off the gas shut off valve and water shutoff  
valve.  
G Remove the front cover.  
G Find the two DIP switches located at the top right  
hand side of the PCB. The switch labeled "DIP 2"  
is the bottom switch.  
G Change the DIP switch #3 setting of DIP 2 to  
“O(” position if the water heater is installed  
above 3N260 feet (1N000m) below 3N530 feet  
(2N000m). See the diagram below. DO (OT alter  
any other DIP Switch.  
NOTICE: 7KHꢀPD[LPXPꢀÀRZꢀUDWHꢀDWꢀꢁꢂƒ)ꢀꢃꢄꢅƒ&ꢆꢀLVꢀ  
1.3 gpm (5.0 l/m).  
G Change the DIP switch #8 setting of DIP 2 to  
“O(” position if the water heater is installed  
above 3N530 feet (2N000m) below 9N680 feet  
(3N000m). See the diagram below. DO (OT alter  
any other DIP Switch.  
NOTICE: Manifold pressure will be reduced by  
this adjustement.  
ON  
2
3
4
1
G Attach the unit’s front cover.  
G Turn on the gas shutoff valve and water shutoff  
valve.  
2
3
4
1
DIP  
Switches  
G 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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AP15317 (10_09) DV Gas Manual 10 30 09.indd 35  
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IF YOU (EED SERVICE  
1. Should you have any questions about your new water heaterN or if it requires adjustmentN repairN  
or routine maintenanceN it is suggested that you first contact your installerN plumbing contractor or  
previously agreed upon service agency. In the event the firm has movedN or is unavailableN refer to  
the telephone directoryN commercial listings or local utility for qualified service assistance.  
2. Should your problem not be solved to your complete satisfactionN you should then contact the  
Manufacturer’s (ational Service Department at the following address:  
1281 Carwood Court  
MontgomeryN Alabama 33117  
Phone: 1-600-832-6373.  
When contacting the manufacturerN 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. (ame 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 peopleN with datesN who have been contacted regarding your problem.  
Important Instructions for the Commonwealth of Massachusetts  
The Commonwealth of Massachusetts requires compliance with regulation 286 CMR  
or equipment. The sign shall readN in print size no less than one-half (1/2) inch in sizeN  
8.00 and 5.00 for installation of through – the – wall vented gas appliances as follows:  
"GAS VE(T DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIO(S".  
5.06: Modifications to (FPA-58N Chapter 10  
8. I(SPECTIO(. The state or local gas inspector of the side wall horizontally vented  
gas fueled equipment shall not approve the installation unlessN upon inspectionN the  
inspector observes carbon monoxide detectors and signage installed in accordance with  
the provisions of 286 CMR 5.06(2)(a)1 through 8.  
(1) Revise (FPA-58 section 10.5.8.2 by adding a second exception as follows:  
Existing chimneys shall be permitted to have their use continued when a gas conversion  
burner is installedN 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) EXEMPTIO(S: The following equipment is exempt from 286 CMR 5.06(2)(a)1  
through 8:  
(2) Revise 10.6.3 by adding the following additional requirements:  
1. The equipment listed in Chapter 10 entitled "Equipment (ot Required To Be Vented"  
in the most current edition of (FPA 58 as adopted by the Board; and  
(a) For all side wall horizontally vented gas fueled equipment installed in every dwellingN  
building or structure used in whole or in part for residential purposesN 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 ventingN  
including but not limited to decks and porchesN 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 dwellingN building or structure used in whole or in  
part for residential purposes.  
(c) MA(UFACTURER REQUIREME(TS - GAS EQUIPME(T VE(TI(G 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 equipmentN the instructions provided by the manufacturer for installation of the  
equipment and the venting system shall include:  
1. I(STALLATIO( OF CARBO( MO(OXIDE DETECTORS. At the time of  
installation of the side wall horizontal vented gas fueled equipmentN 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 additionN 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 dwellingN 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) MA(UFACTURER REQUIREME(TS - GAS EQUIPME(T VE(TI(G SYSTEM  
(OT PROVIDED. When the manufacturer of a Product Approved side wall horizontally  
vented gas fueled equipment does not provide the parts for venting the flue gasesN but  
identifies "special venting systems"N 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 atticN 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 installationN the owner shall have a period of thirty (30) days to comply  
with the above requirements; providedN howeverN that during said thirty (30) day periodN a  
battery operated carbon monoxide detector with an alarm shall be installed.  
2. The "special venting systems" shall be Product Approved by the BoardN  
and the instructions for that system shall include a parts list and detailed installation  
instructions.  
2. APPROVED CARBO( MO(OXIDE DETECTORS. Each carbon monoxide detector  
as required in accordance with the above provisions shall comply with (FPA 720 and be  
A(SI/UL 2038 listed and IAS certified.  
(e) A copy of all installation instructions for all Product Approved side wall horizontally  
vented gas fueled equipmentN all venting instructionsN all parts lists for venting  
instructionsN and/or all venting design instructions shall remain with the appliance or  
equipment at the completion of the installation.  
3. SIG(AGE. A metal or plastic identification plate shall be permanently mounted to the  
exterior of the building at a minimum height of eight (6) feet above grade directly in line  
with the exhaust vent terminal for the horizontally vented gas fueled heating appliance  
33  
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AP15317 (10_09) DV Gas Manual 10 30 09.indd 36  
11/9/2009 3:10:39 PM  

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