Reliance Water Heaters Water Heater D85500NE User Guide
instruction manual  
commercial gas water heaters  
models d85500ne & d85500pe  
series 120/121  
installation - operation - serVice  
- maintenance - limited warranty  
500 Tennessee Waltz Pkwy  
Ashland City, TN 37015  
ASME CRN  
Low Lead Content  
WARNING: If the information in these  
instructions is not followed exactly, a fire  
or explosion may result causing property  
damage, personal injury or death.  
Do not store or use gasoline or other  
flammable vapors and liquids in the  
vicinity of this or any other appliance.  
WHAT TO DO IF YOU SMELL GAS:  
Do not try to light any appliance.  
•
Do not touch any electrical switch; do  
not use any phone in your building.  
•
Immediately call your gas supplier  
from a neighbor’s phone. Follow the  
gas supplier’s instructions.  
•
If you cannot reach your gas supplier,  
call the fire department.  
•
Read and understand this instruction  
manual and the safety messages  
herein before installing, operating or  
servicing this water heater.  
Installation and service must be  
performed by a qualified installer,  
service agency or the gas supplier.  
Failure to follow these instructions and  
safety messages could result in death  
or serious injury.  
Thank you for buying this energy efficient water heater.  
We appreciate your confidence in our products.  
This manual must remain with the  
water heater.  
place these instructions adjacent to heater and notify owner to keep for future reference.  
PRINTED 0211  
318300-001  
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safe installation, use and serVice  
The proper installation, use and servicing of this water heater is extremely important to your safety and the safety of others.  
many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and  
others of a potential injury hazard. read and obey all safety messages and instructions throughout this manual. It is very important  
that the meaning of each safety message is understood by you and others who install, use, or service this water heater.  
This is the safety alert symbol. It is used to alert you to  
potential personal injury hazards. Obey all safety  
messages that follow this symbol to avoid possible  
injury or death.  
DANGER indicates an imminently  
hazardous situation which, if not avoided,  
will result in injury or death.  
DANGER  
WARNING indicates a potentially hazardous  
situation which, if not avoided, could result  
in injury or death.  
WARNING  
CAUTION indicates a potentially hazardous  
situation which, if not avoided, could result in  
minor or moderate injury.  
CAUTION  
CAUTION used without the safety alert  
symbol indicates a potentially hazardous  
CAUTION  
situation which, if not avoided, could result in  
property damage.  
All safety messages will generally tell you about the type of hazard, what can happen if you do not follow the safety message, and  
how to avoid the risk of injury.  
The California Safe Drinking Water and Toxic enforcement Act requires the Governor of California to publish a list of substances  
known to the State of California to cause cancer, birth defects, or other reproductive harm, and requires businesses to warn of  
potential exposure to such substances.  
This product contains a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm. This  
appliance can cause low level exposure to some of the substances listed in the Act.  
approVals  
Low Lead Content  
California AB1953  
ASME CRN  
3
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general safety information  
Fire or Explosion Hazard  
Do not store or use gasoline or other flammable vapors and  
liquids in the vicinity of this or any other appliance.  
Fire Hazard  
For continued protection against  
risk of fire:  
Do not install water heater on  
carpeted floor.  
Do not operate water heater if  
flood damaged.  
Avoid all ignition sources if you smell gas.  
Do not expose water heater controls to excessive gas  
pressure.  
Use only the gas shown on the water heater rating label.  
Maintain required clearances to combustibles.  
Keep ignition sources away from faucets after extended  
periods of non-use.  
Fire and Explosion Hazard  
Read instruction manual before  
installing, using or servicing  
water heater.  
Use joint compound or Teflon tape  
compatible with propane gas.  
Leak test before placing the  
water heater in operation.  
Disconnect gas piping and main  
gas shutoff valve before leak  
testing.  
Install sediment trap in  
accordance with NFPA 54.  
Breathing Hazard - Carbon Monoxide Gas  
Do not obstruct water heater air intake  
with insulating blanket.  
Gas and carbon monoxide detectors  
are available.  
Install water heater in accordance with  
the instruction manual.  
Fire and Explosion Hazard  
Do not use water heater with any gas  
other than the gas shown on the rating  
label.  
Excessive gas pressure to gas valve can  
cause serious injury or death.  
Breathing carbon monoxide can cause brain damage or  
death. Always read and understand instruction manual.  
Turn off gas lines during installation.  
Contact a qualified installer or service  
agency for installation and service.  
CAUTION  
Property Damage Hazard  
All water heaters eventually leak.  
•
•
Do not install without adequate drainage.  
Jumping out control circuits or components can  
result in property damage, personal injury or death.  
Service should only be performed by a qualified service  
agent using proper test equipment.  
•
Altering the water heater controls and/or wiring in any way  
•
Electrical Shock Hazard  
Turn off power to the water heater  
before performing any service.  
could result in permanent damage to the controls or water  
heater and is not covered under the limited warranty.  
•
Altering the water heater controls and/or wiring in any way  
•
could result in altering the ignition sequence allowing gas to  
flow to the main burner before the hot surface igniter is at  
ignition temperature causing delayed ignition which can  
cause a fire or explosion.  
Label all wires prior to disconnecting  
•
when performing service. Wiring errors  
can cause improper and dangerous  
operation.  
Any bypass or alteration of the water  
heater controls and/or wiring will result  
in voiding the appliance warranty.  
Verify proper operation after servicing.  
•
•
Failure to follow these instructions can  
result in personal injury or death.  
4
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general safety information  
Read and understand this instruction  
manual and the safety messages  
herein before installing, operating or  
servicing this water heater.  
Explosion Hazard  
Overheated water can cause  
water tank explosion.  
Failure to follow these instructions and  
safety messages could result in death  
or serious injury.  
Properly sized temperature and  
pressure relief valve must be  
installed in the opening provided.  
This manual must remain with the  
water heater.  
Water temperature over 125°F (52°C)  
can cause severe burns instantly  
CAUTION  
resulting in severe injury or death.  
Improper installation, use and service may result  
in property damage.  
Children, the elderly and the  
physically or mentally disabled are at  
highest risk for scald injury.  
Do not operate water heater if flood damaged.  
Inspect and anode rods regularly, replace if damaged.  
Install in location with drainage.  
Fill tank with water before operation.  
Properly sized thermal expansion tanks are required on all  
closed water systems.  
•
•
•
•
•
Feel water before bathing or  
showering.  
Temperature limiting devices such as  
mixing valves must be installed  
when required by codes and to  
ensure safe temperatures at fixtures.  
Refer to this manual for installation and service.  
Verify the power to the water heater is turned off before performing any service procedures.  
general safety information  
precautions  
hydrogen gas flammable  
DO NOT USe ThIS APPLIANCe IF ANy PArT hAS BeeN  
UNDer WATer. Immediately call a qualified service agency to  
inspect the appliance and to make a determination on what steps  
should be taken next.  
Explosion Hazard  
If the unit is exposed to the following, do not operate heater  
until all corrective steps have been made by a qualified  
service agency.  
Flammable hydrogen gases  
may be present.  
1. external fire.  
2. Damage.  
Keep all ignition sources away  
from faucet when turning on  
hot water.  
3. Firing without water.  
hydrogen gas can be produced in a hot water system served  
by this appliance that has not been used for a long period of  
time (generally two weeks or more). hydrogen gas is extremely  
flammable. To reduce the risk of injury under these conditions, it is  
recommended that a hot water faucet served by this appliance be  
opened for several minutes before using any electrical appliance  
connected to the hot water system. If hydrogen is present there  
will probably be an unusual sound such as air escaping through  
the pipe as the water begins to flow. There ShOULD Be NO  
SmOkING Or OPeN FLAme NeAr The FAUCeT AT The  
TIme IT IS OPeN.  
grounding instructions  
This water heater must be grounded in accordance with the  
National electrical Code and/or local codes. These must be  
followed in all cases.  
This water heater must be connected to a grounded metal,  
permanent wiring system; or an equipment grounding conductor  
must be run with the circuit conductors and connected to the  
equipment grounding terminal or lead on the water heater, see  
Figure 20.  
5
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introduction  
Thank you for purchasing this water heater. Properly installed  
and maintained, it should give you years of trouble free service.  
below) in the field involved. Installation skills such as plumbing,  
air supply, venting, gas supply and electrical supply are required  
in addition to electrical testing skills when performing service.  
abbreViations used  
Abbreviations found in this Instruction manual include :  
ansi Z223.1 2006 sec. 3.3.83: “Qualified Agency” - “Any  
individual, firm, corporation or company that either in person  
or through a representative is engaged in and is responsible  
for (a) the installation, testing or replacement of gas piping  
or (b) the connection, installation, testing, repair or servicing  
of appliances and equipment; that is experienced in such  
work; that is familiar with all precautions required; and that  
has complied with all the requirements of the authority having  
jurisdiction.”  
• ANSI - American National Standards Institute  
• ASme - American Society of mechanical engineers  
• GAmA - Gas Appliance manufacturer’s Association  
• NeC - National electrical Code  
• NFPA - National Fire Protection Association  
• UL - Underwriters Laboratory  
• CSA - Canadian Standards Association  
If you are not qualified (as defined by ANSI above) and licensed  
or certified as required by the authority having jurisdiction  
to perform a given task do not attempt to perform any of the  
procedures described in this manual. If you do not understand  
Qualifications  
Qualified installer or serVice agency  
Installation and service of this water heater requires ability the instructions given in this manual do not attempt to perform  
equivalent to that of a Qualified Agency (as defined by ANSI any procedures outlined in this manual.  
6
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features and components  
the hydro cannon (self-cleaning system)  
electronic ignition control  
These units include The hydro Cannon (Self-Cleaning System) each heater is equipped with an ignition module. The solid state  
installed in the front water inlet, See Figure 1. The hydro Cannon ignition control (Figure 3), ignites the main burner by utilizing a  
inlet tube can only be used in the front water inlet connection. Do silicon nitride igniter. The silicon nitride igniter shuts off during  
not install the hydro Cannon inlet tube in either the top or back inlet the heating cycle and the main burner flame is sensed through  
water connection. The hydro Cannon must be oriented correctly for a remote flame sensor integral to the silicon nitride igniter  
proper function. There is a marked range on the pipe nipple portion assembly.  
of the hydro Cannon, that must be aligned with the top of the inlet  
The ignition control will try to ignite the main burner three times  
spud. A label above the jacket hole has an arrow that will point to  
before lockout. Then it waits one hour before trying again to ignite  
the marked portion of the pipe nipple if the orientation is correct.  
the main burners. This is a continuous cycle.  
If the arrow does not point within the marked range on the pipe  
nipple, adjust the pipe nipple to correct. A pipe union is supplied  
with the hydro Cannon to reduce the probability of misaligning the  
hydro Cannon accidentally while tightening the connection to the  
inlet water supply line. Improper orientation of the hydro Cannon  
can cause poor performance of the heater and can significantly  
reduce outlet water temperatures during heavy draws.  
note: the hydro cannon may have 1, 3 or 7 cross tubes.  
figure 1  
high limit switch  
ignition control board  
The digital thermostat (Figure 2) contains the high limit (energy  
cutoff) switch. The high limit switch interrupts main burner gas flow  
figure 3  
should the water temperature reach 203°F (95°C).  
exhaust inducer (blower assy.)  
In the event of high limit switch operation, the appliance cannot be  
All models are equipped with an exhaust inducer. The inducer  
restarted unless the water temperature is reduced to approximately  
assists in drawing in fresh air to the unit for combustion and then  
120°F (49°C). The high limit reset button on the front of the control  
assists in dispensing the combustion by-products into the venting  
then needs to be depressed.  
leading outside.  
Continued manual resetting of high limit control, preceded by  
The exhaust inducer is equipped with a gravity controlled damper  
higher than usual water temperature is evidence of high limit  
to reduce the amount of heat loss through the flue, improving  
switch operation. The following is a possible reason for high limit  
efficiency.  
switch operation:  
•
A malfunction in the thermostatic controls would allow the gas  
valve to remain open causing water temperature to exceed the  
thermostat setting. The water temperature would continue to  
rise until high limit switch operation.  
Contact your dealer or service agent if continued high limit switch  
operation occurs.  
exhaust inducer  
figure 4  
uncrating  
The heater is shipped with the inducer already installed. The  
wiring conduit runs from the thermostat to the inducer. Before  
turning unit on, check to make sure the wiring conduit is securely  
plugged into the inducer.  
digital thermostat  
figure 2  
7
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installation considerations  
rough in dimensions  
front View  
back View  
top  
outlet  
1 1/2” npt  
top  
inlet  
1 1/2” npt  
f
top View  
figure 5  
table 1. rough-in-dimensions  
Connections  
Dimensions in Inches/cm  
Approx. Ship Weight  
Input Rate  
Btu/Hr  
kw/hr  
Approximate  
Tank Cap  
G/L  
Inlet (NPT)  
Outlet (NPT)  
model  
Gas  
Inlet  
G
Vent  
Dia  
I
Std.  
Lbs/  
kgs.  
ASme  
Lbs/  
kgs.  
A
B
C
D
E
F
H
J
Top Front Back Top Front Back  
D85500NE/  
D85500PE  
D85500NE/  
D85500PE  
500,000  
147  
85  
81.50 17.50 77.25 67.50 27.13 21.00 1.00 67.50 8.00 27.75 1.50 1.50 1.50 1.50 1.50 1.50  
207 44 196 171 69 53 171 20 70 1.50 1.50 1.50 1.50 1.50 1.50  
812  
368  
857  
322  
3
389  
TABLE 2. RECOVERY CAPACITIES, based on 80% efficiency  
Input Rate  
Btu/Hr  
kw/hr  
Approximate  
Tank Cap  
G/L  
recovery rating Capacities (GPh and LPh) at temperature rise indicated  
model  
30°F  
17°C  
40°F  
22°C  
50°F  
28°C  
60°F  
33°C  
70°F  
39°C  
80°F  
44°C  
90°F  
50°C  
100°F  
56°C  
110°F  
61°C  
120°F  
67°C  
130°F  
72°C  
140°F  
78°C  
D85500NE/  
D85500PE  
D85500NE/  
D85500PE  
500,000  
147  
85  
1616  
6118  
1212  
4588  
970  
808  
693  
606  
539  
485  
441  
404  
373  
346  
322  
3671  
3059  
2622  
2294  
2039  
1835  
1668  
1529  
1412  
1311  
table 3. gas and electrical characteristics  
Gas Supply Pressure  
model  
Gas Type  
Gas manifold Pressure  
3.5" W.C. (0.87 kPa)  
10" W.C. (2.49 kPa)  
Volts / hz  
120/60  
Amperes  
Minumum  
Maximum  
D85500NE/  
D85500PE  
D85500NE/  
D85500PE  
Natural  
4.5" W.C. (1.12 kPa)  
14" W.C. (3.48 kPa)  
<5  
<5  
Propane  
11" W.C. (2.74 kPa)  
14" W.C. (3.48 kPa)  
120/60  
8
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installation considerations  
IS NOT SUBJeCT TO PhySICAL DAmAGe By A mOVING  
VehICLe.  
locating the water heater  
flammable items, PreSSUrIZeD CONTAINerS Or ANy  
OTher POTeNTIAL FIre hAZArDOUS ArTICLeS mUST  
NeVer Be PLACeD ON Or ADJACeNT TO The heATer.  
OPeN CONTAINerS Or FLAmmABLe mATerIAL ShOULD  
NOT Be STOreD Or USeD IN The SAme rOOm WITh The  
heATer.  
CAUTION  
Property Damage Hazard  
All water heaters eventually leak.  
•
•
The heATer mUST NOT Be LOCATeD IN AN AreA Where  
IT WILL Be SUBJeCT TO FreeZING.  
Do not install without adequate drainage.  
LOCATe IT NeAr A FLOOr DrAIN. The heATer ShOULD  
Be LOCATeD IN AN AreA Where LeAkAGe FrOm The  
heATer Or CONNeCTIONS WILL NOT reSULT IN DAmAGe  
TO The ADJACeNT AreA Or TO LOWer FLOOrS OF The  
STrUCTUre.  
When installing the heater, consideration must be given to  
proper location. Location selected should be as close to the  
stack or chimney as practicable, with adequate air supply and as  
centralized with the piping system as possible.  
WheN SUCh LOCATIONS CANNOT BeAVOIDeD,ASUITABLe  
DrAIN PAN ShOULD Be INSTALLeD UNDer The heATer.  
Such pans should be fabricated with sides at least 2” deep, with  
length and width at least 2” greater than the diameter of the heater  
and must be piped to an adequate drain. The pan must not restrict  
combustion air flow.  
Fire or Explosion Hazard  
Do not store or use gasoline or other flammable vapors and  
liquids in the vicinity of this or any other appliance.  
clearances  
Avoid all ignition sources if you smell gas.  
This water heater is approved for installation on combustible  
flooring (with NSF Leg kit #9003425205) in an alcove when the  
minimum clearance from any combustible construction is as  
indicated in Figure 6 and Table 4.  
Do not expose water heater controls to excessive gas  
pressure.  
Use only the gas shown on the water heater rating label.  
Maintain required clearances to combustibles.  
In all installations the minimum combustible clearances from  
vent piping shall be 6” (15.2 cm). Vent piping passing through a  
combustible wall or ceiling must be a continuous run (no joints)  
and retain the 6” (15.2 cm) clearance unless an approved reducing  
thimble is used.  
Keep ignition sources away from faucets after extended  
periods of non-use.  
Read instruction manual before  
installing, using or servicing  
water heater.  
A service clearance of 24” (61 cm) should be maintained from  
serviceable parts, such as relief valves, flue baffles, thermostats,  
cleanout openings or drain valves.  
The units are approved for installation with side, rear and ceiling  
clearances as indicated below:  
There IS A rISk IN USING FUeL BUrNING APPLIANCeS  
SUCh AS GAS WATer heATerS IN rOOmS, GArAGeS Or  
OTher AreAS Where GASOLINe, OTher FLAmmABLe  
LIQUIDS Or eNGINe DrIVeN eQUIPmeNT Or VehICLeSAre  
STOreD, OPerATeD Or rePAIreD. FLAmmABLe VAPOrS  
Are heAVy AND TrAVeL ALONG The FLOOr AND mAy Be  
IGNITeD By The heATer’S PILOT Or mAIN BUrNer FLAmeS  
CAUSING FIre Or eXPLOSION. SOme LOCAL CODeS  
PermIT OPerATION OF GAS APPLIANCeS IN SUCh AreAS  
IF They Are INSTALLeD 18” Or mOre ABOVe The FLOOr.  
ThIS mAy reDUCe The rISk IF LOCATION IN SUChANAreA  
CANNOT Be AVOIDeD.  
table 4  
minimum clearances to combustibles in inches (mm)  
"a"  
right  
side  
5"  
"b"  
left  
side  
5"  
"c"  
"d"  
model  
back  
ceiling  
5"  
20"  
(50.8 cm)  
d85500ne/  
d85500pe  
(12.7 cm) (12.7 cm) (12.7 cm)  
table 5  
DO NOT INSTALL ThIS WATer heATer DIreCTLy ON A  
CArPeTeD FLOOr. AFIre hAZArD mAy reSULT. Instead the  
water heater must be placed on a metal or wood panel extending  
beyond the full width and depth by at least 3 inches in any direction.  
If the heater is installed in a carpeted alcove, the entire floor shall  
be covered by the panel. Also, see the DrAINING requirements  
in mAINTeNANCe Section.  
minimum clearances to noncombustible construction  
"a"  
right  
side  
"b"  
"c"  
"d"  
model  
left  
side  
back  
ceiling  
12"  
(30.5 cm)  
d85500ne/  
d85500pe  
0
0
0
The heATer ShALL Be LOCATeD Or PrOTeCTeD SO IT  
9
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insulation blanket  
Breathing Hazard - Carbon Monoxide Gas  
Do not obstruct water heater air intake  
with insulating blanket.  
Gas and carbon monoxide detectors  
are available.  
Install water heater in accordance with  
the instruction manual.  
Breathing carbon monoxide can cause brain damage or  
death. Always read and understand instruction manual.  
Insulation blankets are available to the general public for external  
use on gas water heaters but are not necessary with these  
products. The purpose of an insulation blanket is to reduce the  
standby heat loss encountered with storage tank heaters. The  
water heaters covered by this manual meet or exceed the energy  
Policy Act standards with respect to insulation and standby heat  
loss requirements, making an insulation blanket unnecessary.  
Should you choose to apply an insulation blanket to this  
heater, you should follow these instructions. See the Features  
and Components section of this manual for identification of  
components mentioned below. Failure to follow these instructions  
can restrict the air flow required for proper combustion, potentially  
resulting in fire, asphyxiation, serious personal injury or death.  
figure 6  
installation on combustible flooring  
• do not apply insulation to the top of the water heater, as this  
will interfere with safe operation of the exhaust inducer.  
The D85500Ne/D85500Pe is approved for installations on  
combustible flooring when installed with NSF Leg kit number  
9003425205  
• do not cover the gas valve, thermostat or the Temperature-  
Pressure relief Valve.  
• do not allow insulation to come within 2” (5 cm) of the burners,  
to prevent blockage of combustion air flow to the burners.  
• do not allow insulation to come within 9 inches (23 cm)  
of floor, (within 2 inches (5 cm) of bottom cover) to prevent  
blockage of combustion air flow to the burners..  
• do not cover the instruction manual. keep it on the side of  
the water heater or nearby for future reference.  
• do obtain new warning and instruction labels from the  
manufacturer for placement on the blanket directly over the  
existing labels.  
• do inspect the insulation blanket frequently to make certain it  
does not sag, thereby obstructing combustion air flow.  
hard water  
Where hard water conditions exist, water softening or the  
threshold type of water treatment is recommended. This will  
protect the dishwashers, coffee urns, water heaters, water piping  
and other equipment.  
figure 7  
1. Unit needs to be lifted in a way not to damage unit or laid  
on it’s side to access the bottom of the legs.  
See the maintenance Section in this manual for sediment and  
lime scale removal procedures.  
2. Slide leg extension under leg and the bolt up through the  
bottom hole located in the bottom of the leg.  
circulation pumps  
3. Once in place, screw nut down and secure.  
A circulating pump is used when a system requires a circulating  
loop or there is a storage tank used in conjunction with the water  
heater. See Water Piping Diagrams in this manual for installation  
location of circulating pumps.  
4. Front of leg should line up with front of leg extension as  
shown in Figure 7 to make sure weight of unit is distributed  
through the leg extension.  
10  
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See the Circulation Pump Wiring Diagrams (Figure 8, Figure  
9) in this manual for electrical hookup information. Install in  
accordance with the current edition of the National electrical  
Code, NFPA 70 or the Canadian electrical Code, CSA C22.1.  
Breathing Hazard - Carbon Monoxide Gas  
All-bronze circulators are recommended for used with commercial  
water heaters.  
Under no circumstances should  
the input exceed the rate shown  
on the water heater’s rating label.  
Some circulating pumps are manufactured with sealed bearings  
and do not require further lubrication. Some circulating pumps  
must be periodically oiled. refer to the pump manufacturer’s  
instructions for lubrication requirements.  
Overfiring could result in damage to  
the water heater and sooting.  
Gas and carbon monoxide detectors  
are available.  
CIRCULATING PUMP WIRING DIAGRAM  
STORAGE TANK OR BUILDING RECIRCULATION  
Breathing carbon monoxide can cause brain damage or  
death. Always read and understand instruction manual.  
FIELD SUPPLIED TEMPERATURE CONTROL  
INSTALLED IN THE STORAGE TANK  
OR CIRCULATING LOOP RETURN LINE  
NOTE: USE SEPARATE 120 VAC POWER  
SUPPLY FOR PUMP CIRCUIT. DO NOT  
propane installations  
SHARE POWER WITH APPLIANCE AS THIS  
MAY CAUSE ELECTRICAL LINE NOISE AND  
LEAD TO ERRATIC CONTROL SYSTEM  
INSTALLATIONS ABOVe 2000 FeeT (610 meTerS) reQUIre  
rePLACemeNT OF BUrNer OrIFICeS IN ACCOrDANCe  
WITh CUrreNTeDITIONOFTheNATIONALFUeLGASCODe  
(ANSI Z223.1). FOr CANADIAN INSTALLATIONS CONSULT  
CANADIANINSTALLATIONSCODeCAN/CSAB149.1.FAILUre  
TO rePLACe OrIFICeS WILL reSULT IN ImPrOPer AND  
INeFFICIeNT OPerATION OF The APPLIANCe reSULTING  
IN The PrODUCTION OF INCreASeD LeVeLS OF CArBON  
mONOXIDe GAS IN eXCeSS OF SAFe LImITS WhICh COULD  
reSULT IN SerIOUS PerSONAL INJUry Or DeATh.  
OPERATION.  
L1 HOT  
120 VAC  
POWER  
CIRC  
PUMP  
MOTOR  
L2 NEUTRAL  
figure 8.  
you should contact your gas supplier for any specific changes  
which may be required in your area.  
CIRCULATING PUMP WIRING DIAGRAM  
DISHWASHER LOOP WITH TOGGLE SWITCH  
As elevation above sea level is increased, there is less oxygen  
per cubic foot of air. Therefore, the heater input rate should  
be reduced at high altitudes for satisfactory operation with the  
reduced oxygen supply. Failure to make this reduction would  
result in an over firing of the heater causing sooting, poor  
combustion and/or unsatisfactory heater performance.  
DISHWASHER  
TOGGLE  
FIELD SUPPLIED TEMPERATURE  
CONTROL INSTALLED IN THE  
SWITCH  
CIRCULATING LOOP RETURN LINE  
NOTE: USE SEPARATE 120 VAC POWER  
SUPPLY FOR PUMP CIRCUIT. DO NOT  
SHARE POWER WITH APPLIANCE AS THIS  
MAY CAUSE ELECTRICAL LINE NOISE AND  
LEAD TO ERRATIC CONTROL SYSTEM  
OPERATION.  
ratings specified by manufacturers for most appliances apply for  
elevations up to 2000 feet (610m). For elevations above 2000 feet  
(610), ratings must be reduced at the rate of 4% for each 1000  
feet (305m) above sea level. For example, if a heater is rated at  
78,000 Btuh (22.9 kwh) at sea level, to rate the heater at 4000 feet  
(1219m), you subtract 4 (once for each thousand feet) x.04 (4%  
input reduction) x 78,000 (original rating) from the original rating.  
L1 HOT  
120 VAC  
POWER  
CIRC  
PUMP  
MOTOR  
Therefore, to calculate the input rating at 4,000 feet (1219m): 4 x  
.04 x 78,000 = 12,480 Btuh (3.7 kwh), 78,000 (22.9 kwh) - 12,480  
(3.7 kwh) = 65,520 Btuh (19.2 kwh). At 6000 feet (1829m) the  
correct input rating should be 59,280 Btuh (17.4 kwh).  
L2 NEUTRAL  
figure 9.  
natural gas installations  
high altitude installations  
The natural gas fired version of the water heater covered by this  
manual is certified for use without modification for altitudes up to  
10,100 feet.  
For installations above 10,100 feet call the technical support  
phone number listed on the back cover of this manual for further  
technical assistance. Call the local gas or utility company to verify  
Btu per cubic foot content before calling for technical assistance  
and have that information available.  
Fire and Explosion Hazard  
Under no circumstances should the  
input exceed the rate shown on the  
water heater’s rating label.  
Overfiring could result in fire or  
explosion.  
Note: The actual firing rate of the water heater must not exceed  
the input rating on the water heater's rating label under any  
circumstances.  
Note: Due to the input rating reduction at high altitudes, the  
output rating of the appliance is also reduced and should be  
compensated for in the sizing of the equipment for applications.  
Gas and carbon monoxide detectors are  
available.  
11  
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installation reQuirements  
gas pressure reQuirements  
water temperature controland mixing ValVes  
Water temperature over 125°F (52°C)  
can cause severe burns instantly  
resulting in severe injury or death.  
Natural gas models require a minimum gas supply pressure of  
4.5” W.C. Propane gas models require a minimum gas supply  
pressure of 11" W.C. The minimum supply pressure is measured  
while gas is not flowing (static pressure) AND while gas is flowing  
(dynamic pressure). The supply pressure (static and dynamic)  
should never fall below the specified minimum supply pressure.  
The supply pressure should be measured with all gas fired  
appliances connected to the common main firing at full capacity.  
If the supply pressure drops more than 1.5” W.C. as gas begins  
to flow to the water heater then the supply gas system including  
the gas line and/or the gas regulator may be restricted or  
undersized. See Supply Gas regulator section and Gas Piping  
section of this manual.  
Children, the elderly and the  
physically or mentally disabled are at  
highest risk for scald injury.  
Feel water before bathing or  
showering.  
Temperature limiting devices such as  
mixing valves must be installed  
when required by codes and to  
ensure safe temperatures at fixtures.  
Water heated to a temperature which will satisfy clothes  
washing, dish washing, and other sanitizing needs can scald  
and cause permanent injury upon contact. Short repeated  
heating cycles caused by small hot water uses can cause  
temperatures at the point of use to exceed the water heater’s  
temperature setting by up to 20°F (11°C).  
The gas valve on all models has a maximum gas supply  
pressure limit of 14" W.C. The maximum supply pressure is  
measured while gas is not flowing (static pressure) AND while  
gas is flowing (dynamic pressure).  
Some people are more likely to be permanently injured by  
hot water than others. These include the elderly, children, the  
infirm and the physically/mentally disabled. Table 6 shows the  
approximate time-to-burn relationship for normal adult skin. If  
anyone using hot water provided by the water heater being  
installed fits into one of these groups or if there is a local code  
or state law requiring a certain water temperature at the point  
of use, then special precautions must be taken.  
supply gas regulator  
The water heater covered by this manual may require  
the installation of a supply gas regulator. If the supply gas  
pressure exceeds 14 inches W.C. a supply gas regulator must  
be used. If the gas supply pressure exceeds 14" W.C. in a  
multiple water heater installation, each water heater must  
have its own supply gas regulator. If required, the supply gas  
regulator shall be rated at or above the Btu/hr input rating of  
the water heater it supplies.  
In addition to using the lowest possible temperature setting  
that satisfies the demand of the application a mixing Valve  
should be installed at the water heater (see Figure 10) or at  
the hot water taps to further reduce system water temperature.  
Supply gas regulators shall have inlet and outlet connections  
not less than the minimum supply gas line size for the water  
heater they serve as shown in Table 9. The maxitrol 325-7L or  
equivalent is recommended.  
mixing valves are available at plumbing supply stores.  
Consult a Qualified Installer or Service Agency. Follow mixing  
valve manufacturer’s instructions for installation of the valves.  
table 6.  
Time to Produce 2nd & 3rd  
Degree Burns on Adult Skin  
power supply  
Water Temperature  
180°F (82°C)  
170°F (77°C)  
Nearly instantaneous  
Nearly instantaneous  
The water heaters covered in this manual require a 120  
VAC, 1Ø (single phase), 60hz, 15 amp power supply and  
must also be electrically grounded in accordance with local  
codes or, in the absence of local codes, with the National  
electrical Code, ANSI/NFPA 70 or the Canadian electrical  
Code, CSA C22.1.  
160°F (71°C)  
About 1/2 second  
150°F (66°C)  
140°F (60°C)  
130°F (54°C)  
120°F (49°C)  
About 1-1/2 seconds  
Less than 5 seconds  
About 30 seconds  
More than 5 minutes  
12  
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A properly sized thermal expansion tank must be installed on  
all closed systems to control the harmful effects of thermal  
expansion. Contact a local plumbing service agency to have a  
thermal expansion tank installed.  
HOT WATER  
OUTLET  
12” TO 15”  
(30-38 cm)  
See Water Line Connections on page 19 and the Water Piping  
Diagrams beginning on page 34.  
TEMPERED WATER  
OUTLET  
temperature-pressure relief ValVe  
CHECK  
VALVE  
COLD  
WATER  
INLET  
Explosion Hazard  
MIXING  
VALVE  
CHECK  
VALVE  
Temperature-Pressure Relief Valve  
must comply with ANSI Z21.22-  
CSA 4.4 and ASME code.  
TO TANK  
INLET  
Properly sized temperature-  
pressure relief valve must be  
installed in opening provided.  
figure 10  
dishwashing machines  
Can result in overheating and  
excessive tank pressure.  
All dishwashing machines meeting the National Sanitation  
Foundation requirements are designed to operate with water  
flow pressures between 15 and 25 pounds per square inch (103  
kPa and 173 kPa). Flow pressures above 25 pounds per square  
inch (173 kPa), or below 15 pounds per square inch (103 kPa),  
will result in improperly sanitized dishes. Where pressures are  
high, a water pressure reducing or flow regulating control valve  
should be used in the 180°F (82°C) line to the dishwashing  
machine and should be adjusted to deliver water pressure  
between these limits.  
Can cause serious injury or death.  
This water heater is provided with a properly rated/sized and  
certified combination Temperature-Pressure relief Valve (T&P  
valve) by the manufacturer. The valve is certified by a nationally  
recognized testing laboratory that maintains periodic inspection  
of production of listed equipment of materials as meeting the  
requirements for relief Valves for hot Water Supply Systems,  
ANSI Z21.22 • CSA 4.4, and the code requirements of ASme.  
The National Sanitation Foundation also recommends circulation  
of 180°F (82°C) water. Where this is done, the circulation should  
be very gentle so that it does not cause any unnecessary  
turbulence inside the water heater. The circulation should be just  
enough to provide 180°F (82°C) water at the point of take-off to  
the dishwashing machine.  
If replaced, the new T&P valve must meet the requirements  
of local codes, but not less than a combination Temperature-  
Pressure relief Valve rated/sized and certified as indicated in  
the above paragraph. The new valve must be marked with a  
maximum set pressure not to exceed the marked hydrostatic  
working pressure of the water heater (150 psi = 1,035 kPa) and  
a discharge capacity not less than the water heater Btu/hr or kW  
input rate as shown on the water heater’s model rating label.  
Adjust flow by throttling a full port ball valve installed in the  
circulating line on the outlet side of the pump. Never throttle flow  
on the suction side of a pump. See Water Piping Diagrams in  
this manual.  
NOTe: In addition to the factory installed Temperature-Pressure  
relief Valve on the water heater, each remote storage tank that  
may be installed and piped to a water heating appliance must also  
have its own properly sized, rated and approved Temperature-  
Pressure relief Valve installed. Call the toll free technical  
support phone number listed on the back cover of this manual  
for technical assistance in sizing a Temperature-Pressure relief  
Valve for remote storage tanks.  
closed water systems  
Water supply systems may, because of code requirements  
or such conditions as high line pressure, among others, have  
installed devices such as pressure reducing valves, check  
valves, and back flow preventers. Devices such as these cause  
the water system to be a closed system.  
For safe operation of the water heater, the Temperature-Pressure  
relief Valve must not be removed from its designated opening  
nor plugged. The Temperature-Pressure relief Valve must be  
installed directly into the fitting of the water heater designed for the  
relief valve. Install discharge piping so that any discharge will exit  
the pipe within 6 inches (15.2 cm) above an adequate floor drain,  
or external to the building. In cold climates it is recommended  
that it be terminated at an adequate drain inside the building. Be  
certain that no contact is made with any live electrical part. The  
discharge opening must not be blocked or reduced in size under  
any circumstances. excessive length, over 30 feet (9.14 m), or  
use of more than four elbows can cause restriction and reduce  
the discharge capacity of the valve.  
thermal expansion  
As water is heated, it expands (thermal expansion). In a closed  
system the volume of water will grow when it is heated. As the  
volume of water grows there will be a corresponding increase  
in water pressure due to thermal expansion. Thermal expansion  
can cause premature tank failure (leakage). This type of failure  
is not covered under the limited warranty. Thermal expansion  
can also cause intermittent Temperature-Pressure relief Valve  
operation: water discharged from the valve due to excessive  
pressure build up. This condition is not covered under the limited  
warranty. The Temperature-Pressure relief Valve is not intended  
for the constant relief of thermal expansion.  
13  
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No valve or other obstruction is to be placed between the If you do not understand these instructions or have any questions  
Temperature-Pressure relief Valve and the tank. Do not connect regarding the Temperature-Pressure relief Valve call the toll free  
discharge piping directly to the drain unless a 6” (15.2 cm) number listed on the back cover of this manual for technical  
air gap is provided. To prevent bodily injury, hazard to life, or assistance.  
property damage, the relief valve must be allowed to discharge  
contaminated air  
water in adequate quantities should circumstances demand. If  
the discharge pipe is not connected to a drain or other suitable  
means, the water flow may cause property damage.  
Breathing Hazard - Carbon Monoxide Gas  
CAUTION  
Install water heater in accordance with  
the Instruction Manual and NFPA 54 or  
CAN/CSA-B149.1.  
Water Damage Hazard  
Temperature-Pressure Relief Valve discharge  
pipe must terminate at adequate drain.  
•
To avoid injury, combustion and ventilation  
air must be taken from outdoors.  
Do not place chemical vapor emitting  
products near water heater.  
t&p Valve discharge pipe requirements:  
Breathing carbon monoxide can cause brain damage or  
death. Always read and understand instruction manual.  
• Shall not be smaller in size than the outlet pipe size of the  
valve, or have any reducing couplings or other restrictions.  
Corrosion of the flue ways and vent system may occur if air for  
combustion contains certain chemical vapors. Such corrosion  
may result in failure and risk of asphyxiation.  
• Shall not be plugged or blocked.  
• Shall not be exposed to freezing temperatures.  
• Shall be of material listed for hot water distribution.  
Combustion air that is contaminated can greatly diminish the life  
span of the water heater and water heater components such as  
hot surface igniters and burners. Propellants of aerosol sprays,  
beauty shop supplies, water softener chemicals and chemicals  
used in dry cleaning processes that are present in the combustion,  
ventilation or ambient air can cause such damage.  
• Shall be installed so as to allow complete drainage of both  
the Temperature-Pressure relief Valve and the discharge  
pipe.  
• must terminate a maximum of six inches above a floor  
drain or external to the building. In cold climates, it is  
recommended that the discharge pipe be terminated at an  
adequate drain inside the building.  
Do not store products of this sort near the water heater. Air which  
is brought in contact with the water heater should not contain any  
of these chemicals. If necessary, uncontaminated air should be  
obtained from remote or outdoor sources. The limited warranty is  
voidedwhenfailureofwaterheaterisduetoacorrosiveatmosphere.  
(See limited warranty for complete terms and conditions).  
• Shall not have any valve or other obstruction between the  
relief valve and the drain.  
air reQuirements  
Burn hazard.  
Hot water discharge.  
Breathing Hazard - Carbon Monoxide Gas  
Install water heater in accordance with  
the Instruction Manual and NFPA 54 or  
CAN/CSA-B149.1.  
To avoid injury, combustion and ventilation  
air must be taken from outdoors.  
Keep clear of Temperature-  
Pressure Relief Valve  
discharge outlet.  
Do not place chemical vapor emitting  
products near water heater.  
The Temperature-Pressure relief Valve must be manually  
operated at least twice a year. Caution should be taken to ensure  
that (1) no one is in front of or around the outlet of the Temperature-  
Pressure relief Valve discharge line, and (2) the water manually  
discharged will not cause any bodily injury or property damage  
because the water may be extremely hot. If after manually  
operating the valve, it fails to completely reset and continues to  
release water, immediately close the cold water inlet to the water  
Breathing carbon monoxide can cause brain damage or  
death. Always read and understand instruction manual.  
For safe operation an adequate supply of fresh uncontaminated  
air for combustion and ventilation must be provided.  
heater, follow the draining instructions in this manual, and replace An insufficient supply of air can cause recirculation of combustion  
the Temperature-Pressure relief Valve with a properly rated/sized products resulting in contamination that may be hazardous to  
new one.  
life. Such a condition often will result in a yellow, luminous burner  
flame, causing sooting of the combustion chamber, burners and  
flue tubes and creates a risk of asphyxiation.  
note: The purpose of a Temperature-Pressure relief Valve is  
to prevent excessive temperatures and pressures in the storage  
tank. The T&P valve is not intended for the constant relief of Do not install the water heater in a confined space unless an  
thermal expansion. A properly sized thermal expansion tank must adequate supply of air for combustion and ventilation is brought  
be installed on all closed systems to control thermal expansion, in to that space using the methods described in the Confined  
see Closed Water Systems and Thermal expansion on page 13.  
Space section that follows.  
14  
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Never obstruct the flow of ventilation air. If you have any doubts through the water heater’s vent system causing poor combustion.  
or questions at all, call your gas supplier. Failure to provide the Sooting, serious damage to the water heater and the risk of fire  
proper amount of combustion air can result in a fire or explosion or explosion may result. It can also create a risk of asphyxiation.  
and cause property damage, serious bodily injury or death.  
louVers and grilles  
The free areas of the fresh air openings in the instructions that  
follow do not take in to account the presence of louvers, grilles  
or screens in the openings.  
unconfined space  
An Unconfined Space is one whose volume IS NOT LeSS ThAN  
50 cubic feet per 1,000 Btu/hr (4.8 cubic meters per kW) of the  
total input rating of all appliances installed in the space. rooms  
communicating directly with the space, in which the appliances  
are installed, through openings not furnished with doors, are  
considered a part of the unconfined space.  
The required size of openings for combustion, ventilation  
and dilution air shall be based on the “net free area” of each  
opening. Where the free area through a design of louver or  
grille or screen is known, it shall be used in calculating the  
size of opening required to provide the free area specified.  
Where the louver and grille design and free area are not  
known, it shall be assumed that wood louvers will have 25%  
free area and metal louvers and grilles will have 75% free  
area. Non motorized louvers and grilles shall be fixed in the  
open position.  
makeup air requirements for the operation of exhaust fans,  
kitchen ventilation systems, clothes dryers and fireplaces shall  
also be considered in determining the adequacy of a space to  
provide combustion, ventilation and dilution air.  
unusually tight construction  
In unconfined spaces in buildings, infiltration may be adequate  
to provide air for combustion, ventilation and dilution of flue  
gases. however, in buildings of unusually tight construction (for  
example, weather stripping, heavily insulated, caulked, vapor  
barrier, etc.) additional air must be provided using the methods  
described in the Confined Space section that follows.  
Vent adapter  
The D85500Ne/D85500Pe model is shipped with a 6" to 8"  
diameter vent adapter (Fig. 11). The vent adapter fits on top of  
the installed blower exhaust. Use only vent adapters supplied  
with the unit. The venting must comply with the NATIONAL  
FUeL GAS CODe, ANSI Z223.1/NFPA 54 and for Canadian  
installations consult the Canadian Installation Code CAN/CSA  
B149.1-00.  
confined space  
A Confined Space is one whose volume IS LeSS ThAN 50 cubic  
feet per 1,000 Btu/hr (4.8 cubic meters per kW) of the total input  
rating of all appliances installed in the space.  
Openings must be installed to provide fresh air for combustion,  
ventilation and dilution in confined spaces. The required size for  
the openings is dependent on the method used to provide fresh  
air to the confined space AND the total Btu/hr input rating of all  
appliances installed in the space.  
exhaust fans  
Where exhaust fans are installed, additional air shall be provided  
to replace the exhausted air. When an exhaust fan is installed  
in the same space with a water heater, sufficient openings to  
provide fresh air must be provided that accommodate the  
requirements for all appliances in the room and the exhaust fan.  
Undersized openings will cause air to be drawn into the room  
figure 11  
Venting installation  
•
Do not connect the heater to a common vent or chimney  
with solid fuel burning equipment. This practice is  
prohibited by many local building codes as is the  
practice of venting gas fired equipment to the duct work  
of ventilation systems.  
Venting  
The INSTrUCTIONS IN ThIS SeCTION ON VeNTING mUST  
Be FOLLOWeD TO AVOID ChOkeD COmBUSTION Or  
reCIrCULATION OF FLUe GASeS. SUCh CONDITIONS  
CAUSe SOOTING Or rISkS OF FIre AND ASPhyXIATION.  
heater must be protected from freezing downdrafts.  
remove all soot or other obstructions from the chimney that will  
retard a free draft.  
Type B venting is recommended with these heaters. For  
typical venting application see TeChNICAL DATA VeNTING  
on page 18.  
This water heater must be vented in compliance with all local  
codes, the current revision of the National Fuel Gas Code  
(ANSI-Z223.1) and with the Category I Venting Tables.  
figure 12  
•
Where a separate vent connection is not available and the  
vent pipe from the heater must be connected to a common  
If any part of the vent system is exposed to ambient temperatures  
below 40°F it must be insulated to prevent condensation.  
15  
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vent with an oil burning furnace, the vent pipe should enter  
the smaller common vent or chimney at a point above the  
large vent pipe.  
outdoor air through one opening  
multiple heater manifold  
Figure 13 and Table 7 should be used for horizontally manifolding  
two or more heaters.  
figure 15  
Alternatively a single permanent opening, commencing within 12  
inches (300 mm) of the top of the enclosure, shall be provided. See  
Figure 15. The water heater shall have clearances of at least 1 inch  
(25 mm) from the sides and back and 6 inches (l50 mm) from the  
front of the appliance. The opening shall directly communicate with  
the outdoors or shall communicate through a vertical or horizontal  
duct to the outdoors or spaces that freely communicate with the  
outdoors and shall have a minimum free area of the following:  
figure 13  
fresh air openings for confined spaces  
The following instructions shall be used to calculate the size,  
number and placement of openings providing fresh air for  
combustion, ventilation and dilution in confined spaces. The  
illustrations shown in this section of the manual are a reference  
for the openings that provide fresh air into confined spaces  
only. DO NOT refer to these illustrations for the purpose of vent  
installation. See Venting Installation on page 15 for complete  
venting installation instructions.  
1. 1 square inch per 3000 Btu/hr (733 mm2 per kW) of the total  
input rating of all appliances located in the enclosure, and  
2. Not less than the sum of the areas of all vent connectors in  
the space.  
outdoor air through two horiZontal ducts  
outdoor air through two openings  
figure 16  
The confined space shall be provided with two permanent  
horizontal ducts, one commencing within 12 inches (300 mm) of  
the top and one commencing within 12 inches (300 mm) of the  
bottom of the enclosure. The horizontal ducts shall communicate  
directly with the outdoors. See Figure 16.  
figure 14  
The confined space shall be provided with two permanent  
openings, one commencing within 12 inches (300 mm) of the top  
and one commencing within 12 inches (300 mm) of the bottom of  
the enclosure. The openings shall communicate directly with the  
outdoors. See Figure 14.  
each duct opening shall have a minimum free area of 1 square  
inch per 2,000 Btu/hr (1100 mm2 per kW) of the aggregate input  
rating of all appliances installed in the enclosure.  
each opening shall have a minimum free area of 1 square inch  
per 4,000 Btu/hr (550 mm2 per kW) of the aggregate input rating  
of all appliances installed in the enclosure. each opening shall  
not be less than 100 square inches (645 cm2).  
When ducts are used, they shall be of the same cross sectional  
area as the free area of the openings to which they connect.  
The minimum dimension of rectangular air ducts shall be not less  
than 3 inches.  
16  
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When ducts are used, they shall be of the same cross sectional  
area as the free area of the openings to which they connect.  
The minimum dimension of rectangular air ducts shall be not less  
than 3 inches.  
outdoor air through two Vertical ducts  
The illustrations shown in this section of the manual are a  
reference for the openings that provide fresh air into confined  
spaces only.  
air from other indoor spaces  
do not refer to these illustrations for the purpose of vent  
installation. See Venting Installation on page 15 for complete  
venting installation instructions.  
figure 18  
The confined space shall be provided with two permanent  
openings, one commencing within 12 inches (300 mm) of the top  
and one commencing within 12 inches (300 mm) of the bottom of  
the enclosure. See Figure 18.  
figure 17  
The confined space shall be provided with two permanent vertical  
ducts, one commencing within 12 inches (300 mm) of the top and  
one commencing within 12 inches (300 mm) of the bottom of the  
enclosure. The vertical ducts shall communicate directly with the  
outdoors. See Figure 17.  
each opening shall communicate directly with an additional  
room(s) of sufficient volume so that the combined volume of all  
spaces meets the criteria for an Unconfined Space.  
each opening shall have a minimum free area of 1 square inch  
per 1,000 Btu/hr (2200 mm2 per kW) of the aggregate input rating  
of all appliances installed in the enclosure. each opening shall  
not be less than 100 square inches (645 cm2).  
each duct opening shall have a minimum free area of 1 square  
inch per 4,000 Btu/hr (550 mm2 per kW) of the aggregate input  
rating of all appliances installed in the enclosure.  
17  
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table 7. technical data Venting  
type b gas Vent  
multiple gas fired tank-type heaters  
When venting multiple tank type heaters using Type B vent  
pipe, follow the installation diagram (figure 13) and tables  
below which give sizing and data based upon NFPA 54/ANSI  
Z223. 2006.  
model 500  
input: 500,000 btu/hr  
Total Vent height (Feet)  
15 20  
Vent Connector Diameter (Inches)  
Vent connector size: 8 inches  
6
8
10  
30  
50  
100  
Input (btu/hr)  
500,000  
Rise  
1 Ft.  
2 Ft.  
3 Ft.  
-
10  
10  
10  
10  
10  
9
10  
9
9
9
9
8
8
8
8
8
7
7
7
7
500,000  
10  
10  
500,000  
9
multiple fan assisted water heaters  
Total Vent height (Feet)  
15 20  
6
8
10  
30  
50  
100  
Number of 500  
Heaters  
Combined  
Input (btu/hr)  
manifold and Common Vent Diameter (Inches)  
2
3
4
1,000,000  
1,500,000  
2,000,000  
14  
16  
18  
14  
16  
18  
12  
14  
16  
12  
14  
16  
10  
14  
14  
10  
12  
14  
9
8
12  
12  
10  
12  
combination of multiple fan assisted and natural draft water heaters  
Total Vent height (Feet)  
6
8
10  
15  
20  
30  
50  
100  
Number of 500  
Heaters  
Combined  
Input (btu/hr)  
manifold and Common Vent Diameter (Inches)  
2
3
4
1,000,000  
1,500,000  
2,000,000  
16  
18  
20  
14  
18  
20  
14  
16  
18  
14  
16  
18  
12  
14  
16  
12  
14  
16  
10  
12  
14  
9
10  
12  
18  
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water heater installation  
This water heater is provided with a properly rated/sized and  
water line connections  
certified combination temperature - pressure (T&P) relief valve  
by the manufacturer. See Temperature-Pressure relief Valve  
on pages 13-14 for information on replacement and other  
requirements.  
This manual provides detailed installation diagrams (see pages  
34-48 of this manual) for typical methods of application for the  
water heater(s).  
water (potable) heating and space heating  
1. All piping components connected to this unit for space  
heating applications shall be suitable for use with potable  
water.  
CAUTION  
Water Damage Hazard  
2. Toxic chemicals, such as those used for boiler treatment,  
shall NeVer be introduced into this system.  
Temperature-Pressure Relief Valve discharge  
pipe must terminate at adequate drain.  
•
3. This unit may NeVer be connected to any existing  
heating system or component(s) previously used with a  
non-potable water heating appliance.  
4. When the system requires water for space heating at  
temperatures higher than required for domestic water  
purposes, a tempering valve must be installed. Please  
refer to installation diagrams on pages 34-48 of this manual  
for suggested piping arrangements.  
Install a discharge pipe between theT&Pvalve discharge opening  
and a suitable floor drain. Do not connect discharge piping  
directly to the drain unless a 6” (15.2 cm) air gap is provided.  
To prevent bodily injury, hazard to life, or property damage, the  
relief valve must be allowed to discharge water in adequate  
quantities should circumstances demand. If the discharge pipe is  
not connected to a drain or other suitable means, the water flow  
may cause property damage.  
thermometers (not supplied)  
Thermometers should be obtained and field installed as shown in  
the installation diagrams.  
t&p Valve discharge pipe requirements:  
Thermometers are installed in the system as a means of detecting  
the temperature of the outlet water supply.  
• Shall not be smaller in size than the outlet pipe size  
of the valve, or have any reducing couplings or other  
restrictions.  
water piping diagrams  
This manual provides detailed water piping diagrams for typical  
methods of application for the water heaters, see Water Piping  
Diagrams beginning on page 34.  
• Shall not be plugged or blocked.  
• Shall not be exposed to freezing temperatures.  
• Shall be of material listed for hot water distribution.  
The water heater may be installed by itself, or with a separate  
storage tank, on both single and two-temperature systems. When  
used with a separate storage tank, the circulation may be either  
by gravity or by means of a circulating pump. When a circulating  
pump is used it is important to note that the flow rate should be  
slow so that there will be a minimum of turbulence inside the heater.  
• Shall be installed so as to allow complete drainage of both  
the Temperature-Pressure relief Valve and the discharge  
pipe.  
• must terminate a maximum of six inches above a floor  
drain or external to the building. In cold climates, it is  
recommended that the discharge pipe be terminated at an  
adequate drain inside the building.  
Adjust flow by throttling a full port ball valve installed in the  
circulating line on the outlet side of the pump. Never throttle flow  
on the suction side of a pump.  
• Shall not have any valve or other obstruction between the  
relief valve and the drain.  
t&p ValVe discharge pipe  
The type, size and location of the relief valves must be in  
accordance with local codes. The locations of the relief valves  
shown in the installation diagrams are typical. See pages 34-48.  
The heater has a factory installed high temperature limit switch  
and temperature and pressure relief valve.  
Explosion Hazard  
Temperature-Pressure Relief Valve  
must comply with ANSI Z21.22-  
CSA 4.4 and ASME code.  
Cold water lines to heater should be installed as shown in  
order to minimize gravity circulation of hot water to building  
cold water lines.  
Properly sized temperature-  
pressure relief valve must be  
installed in opening provided.  
Alisted temperature and pressure relief valve of adequate capacity  
is installed on the heater. The locations shown in the installation  
diagrams on pages 34-48 are typical.  
Can result in overheating and  
excessive tank pressure.  
The discharge opening of the temperature and pressure relief  
valve must be piped to an open drain and should not be subject  
to freezing temperatures.  
Can cause serious injury or death.  
Install in accordance with all local codes.  
19  
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installation diagrams - topinlet/outlet usage code restrictions  
Use of the top inlet water connection requires installation of an  
inlet dip tube (refer to figure 19). The tube is supplied in the  
heater. Follow caution labels if applying heat to this fitting. Do  
not allow pipe dope to contact the plastic tube during installation.  
Use of the top inlet water connection is not permitted on  
installations in the state of North Carolina, due to the material  
of the tube (Polypropylene). Where such code restrictions exist,  
use only lower inlet tank connection. This may also require a  
heat trap - check local codes. The “Top Outlet” connection  
may still be used on these applications. Plug or cap all unused  
openings in the tank before filling with water.  
tube inlet installation  
temperature setting should not exceed  
safe use temperature at fixtures. see water  
temperature control and mixing ValVe warning  
on page 12. if higher preheat temperatures are  
necessary to obtain adeQuate booster output,  
add an anti-scald ValVe for hot water supplied  
to fixtures.  
figure 19  
20  
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heater wiring  
All electrical work must be installed in accordance with the latest version of the National electrical Code ANSI/NFPA No. 70 and  
must conform to all local code authority having jurisdiction. AN eLeCTrICAL GrOUND IS reQUIreD TO reDUCe rISk OF  
eLeCTrICAL ShOCk Or POSSIBLe eLeCTrOCUTION.  
If any of the original wire as supplied with the appliance must be replaced, use only type 105°C thermoplastic or equivalent and 2500C  
type F must be used for the flame sensor and igniter leads.  
The controls of this water heater are polarity sensitive. Be certain to properly wire the hot and neutral connections.  
figure 20  
21  
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DISCONNeCT The heATerAND ITS mANUALGAS ShUTOFF  
VALVe FrOm The GAS SUPPLy PIPING SySTem DUrINGANy  
SUPPLy PreSSUre TeSTING eXCeeDING 1/2 PSIG. GAS  
SUPPLy LINe mUST Be CAPPeD WheN DISCONNeCTeD  
FrOm The heATer. FOr TeST PreSSUreS OF 1/2 PSIG Or  
LeSS The APPLIANCe NeeD NOT Be DISCONNeCTeD, BUT  
mUST Be ISOLATeD FrOm The SUPPLy PreSSUre TeST  
By CLOSING The mANUAL GAS ShUTOFF VALVe.  
gas piping  
Contact your local gas service company to ensure that adequate  
gas service is available and to review applicable installation  
codes for your area.  
Size the main gas line in accordance withTable 9. The figures shown  
are for straight lengths of pipe at 0.5 in. W.C. pressure drop, which is  
considered normal for low pressure systems. Note: Fittings such as  
elbows, tees and line regulators will add to the pipe pressure drop.  
Also refer to the latest version of the National Fuel Gas Code.  
gas piping and dirt leg installation  
Schedule 40 metallic Pipe is the preferred material for the gas  
line of this water heater. It is imperative to follow the sizing  
recommendations in the latest version of the National Fuel Gas  
Code if Corrugated Stainless Steel Tubing (CSST) is used as the  
gas line for this water heater.  
The heATer IS NOT INTeNDeD FOr OPerATION AT hIGher  
ThAN 14.0” W.C.- NATUrAL GAS, (1/2 POUND Per SQUAre  
INCh GAGe) SUPPLy GAS PreSSUre. eXPOSUre TO  
hIGher SUPPLy PreSSUre mAy CAUSe DAmAGe TO The  
GAS VALVe WhICh COULD reSULT IN FIre Or eXPLOSION.  
IF OVerPreSSUre hAS OCCUrreD SUCh AS ThrOUGh  
ImPrOPer TeSTING OF GAS LINeS Or emerGeNCy  
mALFUNCTION OF The SUPPLy SySTem, The GAS VALVe  
mUST Be CheCkeD FOr SAFe OPerATION. mAke SUre ThAT  
The OUTSIDe VeNTS ON The SUPPLy reGULATOrSAND The  
SAFeTy VeNT VALVeSAre PrOTeCTeDAGAINST BLOCkAGe.  
TheSe Are PArTS OF The GAS SUPPLy SySTem, NOT The  
heATer. VeNT BLOCkAGe mAy OCCUr DUrING ICe STOrmS.  
figure 21  
table 9 - gas supply pipe length (feet)  
purging  
500,000 btu/hr input rate  
Schedule 40 metallic  
pipe nominal dia.  
mAXImUm eQUIVALeNT PIPe LeNGTh (FeeT)  
Gas line purging is required with new piping or systems in which  
air has entered.  
Natural Gas  
Propane  
10  
3/4"  
1"  
-
PUrGING ShOULD Be PerFOrmeD By PerSONS  
eXPerIeNCeD IN ThIS TyPe GAS SerVICe. TO AVOID rISk  
OF FIre Or eXPLOSION, PUrGe DISChArGe mUST NOT  
eNTer CONFINeDAreAS Or SPACeS Where IGNITION CAN  
OCCUr. The AreA mUST Be WeLL VeNTILATeD AND ALL  
SOUrCeS OF IGNITION mUSTBe INACTIVATeD Or remOVeD.  
10  
40  
1 1/4"  
1 1/2"  
2"  
60  
150  
350  
400  
400  
150  
200  
200  
2 1/2"  
gas meter siZe — natural gases only  
Natural Gas: 0.60 Specific Gravity, 0.50"W.C. pressure drop  
Propane Gas: 1.50 Specific Gravity, 0.50"W.C. pressure drop  
Be sure the gas meter has sufficient capacity to supply the full  
rated gas input of the water heater as well as the requirements of  
all other gas fired equipment supplied by the meter. If gas meter  
is too small, ask the gas company to install a larger meter having  
adequate capacity.  
IT IS ImPOrTANT TO GUArD AGAINST GAS VALVe FOULING  
FrOm CONTAmINANTS IN The GAS WAyS. SUCh FOULING  
mAy CAUSe ImPrOPer OPerATION, FIre Or eXPLOSION.  
IF COPPer SUPPLy LINeS Are USeD They mUST Be  
INTerNALLy TINNeD AND CerTIFIeD FOr GAS SerVICe.  
BeFOreATTAChING The GAS LINe, Be SUre ThATALL GAS  
PIPe IS CLeAN ON The INSIDe.  
gas pressure regulator  
The gas pressure regulator is built into the gas valve and is equipped to  
operate on the gas specified on model and rating plate. The regulator  
is factory adjusted to deliver gas to burner at correct water column  
pressure allowing for a nominal pressure drop through the controls.  
TO TrAP ANy DIrT Or FOreIGN mATerIAL IN The GAS  
SUPPLy LINe, A DIrT LeG (SOmeTImeS CALLeD SeDImeNT  
TrAP Or DrIP LeG) mUST Be INCOrPOrATeD IN The  
PIPING (See FIG. 21). The DIrT LeG mUST Be reADILy  
ACCeSSIBLeAND NOTSUBJeCTTO FreeZING CONDITIONS.  
INSTALL IN ACCOrDANCe WITh reCOmmeNDATIONS OF  
SerVING GAS SUPPLIerS. reFer TO The LATeST VerSION  
OF THE NATIONAL FUeL GAS CODe.  
The minimum gas supply pressure for input adjustment must not  
be less than 4.5” W.C. (1.12 kPa) for natural gas or 11.0"W.C.  
(2.74 kPa) for propane gas.  
Do not subject the combination gas valve to inlet gas  
pressures of more than 14.0” W.C. (3.48 kPa). Aservice regulator  
is necessary if higher gas pressures are encountered.  
To prevent damage, care must be taken not to apply too much  
torque when attaching gas supply pipe to gas valve inlet.  
The manifold gas pressure specified in Table 10 refers to the gas  
pressure measured at the pressure tap of the automatic gas valve  
when the burners are firing.  
Apply joint compounds (pipe dope) sparingly and only to the male  
threadsofpipejoints. Donotapplycompoundstothefirsttwothreads.  
Usecompoundsresistanttotheactionofliquefiedpetroleumgases.  
table 10 - manifold gas pressure in inches of  
water column (all models*)  
BeFOre PLACING The heATer IN OPerATION, CheCk FOr  
GAS LeAkAGe. Use soap and water solution or other material  
acceptable for the purpose in locating the leaks. DO NOT USe  
mATCheS, CANDLeS, FLAme Or OTher SOUrCeS OF  
IGNITION FOr ThIS PUrPOSe.  
type of gas  
natural  
3.5 (0.87 kPa)  
propane  
10.0 (2.49 kPa)  
22  
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operation  
The GAS VALVe mUST hAVe BeeN IN The OFF POSITION  
important  
FOr AT LeAST 5 mINUTeS. This waiting period is an  
important safety step. Its purpose is to permit gas that may  
have accumulated in the combustion chamber to clear. IF yOU  
DeTeCT GAS ODOr AT The eND OF ThIS PerIOD DO NOT  
PrOCeeD WITh LIGhTING. reCOGNIZe ThAT GAS ODOr,  
A qualified person must perform the initial firing of the heater. At  
this time the user should not hesitate to ask the individual any  
questions which they may have in regard to the operation and  
maintenance of the unit.  
An Operational Checklist is included on page 33 of this manual. eVeN IF IT SeemS WeAk, mAy INDICATe PreSeNCe OF  
ACCUmULATeD GAS SOmePLACe IN The AreA WITh  
rISk OF FIre Or eXPLOSION. See The FrONT PAGe FOr  
STePS TO Be TAkeN.  
By using this checklist the user may be able to make minor  
operational adjustments and avoid unnecessary service calls.  
however, the user should not attempt repairs which are not listed  
under the USer column.  
All gas and water lines must be leak tested and open.  
general  
read SeQUeNCe OF OPerATION section of this manual prior  
to lighting and operating this appliance.  
NeVer OPerATe The heATer WIThOUT FIrST BeING  
CerTAIN IT IS FILLeD WITh WATer AND A TemPerATUre  
AND PreSSUre reLIeF VALVe IS INSTALLeD IN The  
reLIeF VALVe OPeNING OF The heATer.  
With above conditions satisfied, start the unit in accordance with  
the instructions on the operating label attached to the heater. For  
your convenience a copy of the instructions are shown on page  
24. each heater is equipped with an ignition control board. The  
controller will try three times to light the main burner before going  
into lockout. After the controller tries three times, it will wait one  
hour before trying to light the unit again. This cycle will continue  
until the main burners are ignited or the unit is shut down.  
ShOULD OVerheATING OCCUr Or The GAS SUPPLy FAIL  
TO ShUT OFF, TUrN OFF The mANUAL GAS CONTrOL  
VALVe TO The APPLIANCe.  
Before proceeding with the operation of the unit make sure  
the water heater and system are filled with water and all air is  
expelled.  
adjustments  
ON INITIALSTArTUPSOmeADJUSTmeNTSAre NeCeSSAry.  
1. CheCk mANIFOLD AND INLeT GAS PreSSUreS.  
filling  
1. Close the heater drain valve by turning handle clockwise.  
2. CyCLe CheCk - CheCk AT LeAST ONe BUrNer  
OPerATION - WheN ThermOSTAT IS SATISFIeD,  
BUrNer WILL ShUT OFF AND INDUCer WILL STOP  
rUNNING. ON CALL FOr heAT - The INDUCer WILL  
COme ONAND CLOSe The PreSSUre SWITChAND The  
IGNITION SeQUeNCe DeSCrIBeD ABOVe WILL BeGIN,  
See “SeQUeNCe OF OPerATION”.  
2. Open a nearby hot water faucet to permit the air in the system  
to escape.  
3. Fully open the cold water inlet pipe valve allowing the heater  
and piping to be filled.  
4. Close the hot water faucet as water starts to flow.  
5. The heater is ready to be operated.  
seQuence of operation  
The following information will describe the Sequence of Operation  
for this appliance.  
Board waits 3 seconds and then shuts off power to the Silicon  
Nitride Ignitor.  
11. From the time the Silicon Nitride Ignitor’s power is shut off,  
the Ignition Control Board waits 3 more seconds to monitor  
the Flame Sensor.  
1. Switch power on to unit.  
2. Thermostat calls for heat.  
3. Ignition Control Board performs diagnostic check on system  
components.  
12. If the Flame Sensor does not detect a strong enough flame,  
the Ignition Control Board shuts off the Gas Valve and allows  
the exhaust Inducer to purge the unit for 20 seconds. At that  
time, the Ignition Control Board restarts with step 7. It will try  
and ignite the main burners 2 more times. If the unit does not  
light, the Ignition Control Board will wait one hour and then  
restart at step 3. This cycle will continue until the unit lights  
or the power is shutoff to the unit.  
4. On completion of diagnostics check, the Ignition Control Board  
sends signal to exhaust Inducer.  
5. exhaust Inducer begins drawing air through appliance closing  
the Prover Switch.  
6. On completion of Prover Switch engagement, the Ignition  
Control Board begins the ignition cycle.  
7. The Ignition Control Board provides power to the Silicon  
Nitride Ignitor.  
13. If the Flame Sensor detects a strong flame, the Ignition Control  
Board will allow the unit to operate until the thermostat is  
satisfied.  
8. The Silicon Nitride Ignitor heats up for approximately 17 to  
20 seconds.  
14. Once the unit is satisfied, the Ignition Control Board will shut  
off the Gas Valve and the unit will be in standby mode until  
another call for heat is initiated by the thermostat.  
9. At the end of Silicon Nitride Ignitor’s warm-up, the Ignition  
Control Board opens the Gas Valve.  
See the flow chart on page 32 for more information.  
10. From the time the Gas Valve opens, the Ignition Control  
23  
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lighting & operation label  
FOR YOUR SAFETY READ BEFORE OPERATING  
If you do not follow these instructions exactly, a fire or explosion  
may result causing property damage, personal injury, or loss of life.  
WARNING  
FLAMMABLE  
If you cannot reach your gas supplier, call the fire department.  
A.  
This appliance does not have a pilot. It is equipped with an ignition device which  
automatically lights the burner. Do not try to light the burner by hand.  
C.  
D.  
Use only your hand to push in or turn the gas control knob. Never use tools. If  
the knob will not push in or turn by hand, don't try to repair it. Call a qualified  
service technician. Force or attempted repair may result in a fire or explosion.  
B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell  
next to the floor because some gas is heavier than air and will settle on the floor.  
"WHAT TO DO IF YOU SMELL GAS"  
Do not use this appliance if any part has been under water. Immediately call a  
qualified service technician to inspect the appliance and to replace any part of  
the control system and any gas control which has been under water.  
Do not try to light any appliance.  
Do not touch any electric switch; do not use any telephone in your building.  
Immediately call your gas supplier from a neighbor's telephone. Follow the  
gas suppliers instructions.  
OPERATING INSTRUCTIONS  
GAS  
STOP! Read the safety information above on this label.  
1.  
2.  
CONTROL  
KNOBS  
PSI  
Set thermostat to lowest setting.  
Turn off all electric power to the appliance.  
3.  
4.  
IN  
ON  
This appliance is equipped with an ignition device which automatically lights  
the burner. Do not try to light the burner by hand.  
OFF  
5. Push in gas control knobs slightly and turn clockwise  
to off.  
Wait five(5) minutes to clear out any gas. If you then smell gas,  
Follow "B" in the safety information above on this label. If you  
smell gas, go on to next step.  
STOP!.  
don't  
6.  
PSI  
Turn gas control knobs counterclockwise  
Turn on all electric power to the appliance.  
to "ON".  
7.  
8.  
IN  
ON  
9. Set thermostat to desired setting.  
OFF  
If the appliance will not operate, follow the instructions "To Turn Off Gas To Appliance"  
and call your service technician or gas supplier.  
10.  
FOR YOUR SAFETY READ BEFORE OPERATING  
Set the thermostat to lowest setting.  
Push in gas control knobs slightly and turn clockwise  
to "OFF". Do not force.  
1.  
2.  
3.  
Turn off all electric power to appliance if service is to be performed.  
figure 22  
24  
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check Venting  
The following steps shall be followed with each appliance  
connected to the venting system placed in operation, while any  
other appliances connected to the venting system are not in  
operation.  
1. Seal any unused openings in the venting system.  
2. Inspect the venting system for proper size and horizontal pitch,  
as required in the National Fuel Gas Code, ANSI Z223.1or the  
CAN/CGA B149 Installation Codes and these instructions.  
Determine that there is no blockage or restriction, leakage,  
corrosion and other deficiencies which could cause an unsafe  
condition.  
figure 23  
main burner  
The main burner, figure 24, should display the following  
characteristics:  
3. So far as is practical, close all building doors and windows  
and all doors between the space in which the water heater(s)  
connected to the venting system are located and other spaces  
of the building. Turn on all appliances not connected to the  
venting system. Turn on all exhaust fans, such as range hoods  
and bathroom exhausts, so they shall operate at maximum  
speed. Close fireplace dampers.  
•
•
Cause rapid ignition and carry across entire burner.  
Give reasonably quiet operation during ignition, burning, and  
extinction.  
•
Cause no excessive lifting of flame from burner ports.  
4. Follow the lighting instruction. Place the water heater being  
inspected in operation. Adjust thermostat so appliance shall  
operate continuously.  
figure 24  
5. Test for spillage at the burner level after 5 minutes of main  
burner operation.  
If the preceding burner characteristics are not evident, check for  
accumulation of lint, scale or other foreign debris that restricts or  
blocks the air openings to the burner or heater.  
6. After it has been determined that each water heater connected  
to the venting system properly vents when tested as outlined  
above, return doors, windows, exhaust fans, fireplace dampers  
and any other gas burning appliance to their previous conditions  
of use.  
NOTe:  
1. remove main burners from unit.  
2. Check that burner venturi and ports are free of foreign debris.  
7. If improper venting is observed during any of the above tests, 3. Clean burners with bristle brush and/or vacuum cleaner - DO  
NOT distort burner ports or pilot location.  
the venting system must be corrected.  
4. reinstall burners in unit. make sure front and rear of burners  
FAILUre TO COrreCT BACk DrAFTS mAy CAUSe AIr  
CONTAmINATION AND UNSAFe CONDITIONS.  
are installed correctly in burner support brackets.  
Also check for good flow of combustion and ventilating air to the  
unit. maintain a clear area around the heater at all times.  
•
If the back draft cannot be corrected by the normal method or  
if a suitable draft cannot be obtained, a blower type flue gas  
exhauster must be employed to assure proper venting and  
correct combustion.  
gas ValVes  
Figure 25 shows the type of combination manual gas control valve  
and regulator used on these heaters.  
check the igniter assembly  
If the gas valve becomes defective, repairs should not be  
attempted. A new valve should be installed in place of the  
defective one.  
At least once a year, check the igniter assembly, Figure 23, and  
the main burner, Figure 24, for proper operation. refer to the  
following igniter assembly and main burner sections.  
igniter assembly  
For access to igniter assembly, unfasten two screws to burner  
cover and remove. Locate the burner with the igniter assembly  
and remove screw holding burner to manifold. Slide burner out  
to access igniter assembly.  
Servicing of the igniter assembly includes keeping the igniter free  
of lint, scale or any other foreign debris.  
figure 25  
25  
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(3600/7.56) X 1050 = 500,000 Btuh (Compare with the  
D85500Ne model and rating.)  
checking the input  
For appliance installation locations with elevations above 2000  
feet, refer to hIGh ALTITUDe INSTALLATIONS section of this  
manual for input reduction procedure.  
Should it be necessary to adjust the gas pressure to the burners  
to obtain the full input rate, the steps below should be followed:  
1. Attach a pressure gauge or a manometer to the manifold  
pressure tap on the gas valve and refer to Table 3, page 8 for  
correct manifold pressure.  
3. remove the regulator adjustment sealing cap, fig. 25, and adjust  
the pressure by turning the adjusting screw with a screwdriver.  
Clockwise to increase gas pressure and input rate.  
Counterclockwise to decrease gas pressure and input rate.  
4. “Clock” the meter as in step 2 above.  
2. Use this formula to “clock” the meter. Be sure that other gas  
consuming appliances are not operating during this interval.  
(3600/T) x h = Btuh  
5. repeat steps 3 and 4 until the specified input rate is achieved.  
T = Time in seconds to burn one cubic foot of gas.  
h = Btu’s per cubic foot of gas.  
Btuh = Actual heater input.  
example: (Using D85500NE heater)  
T = 7.56 seconds  
6. Turn the gas control knob to PILOT. remove the pressure  
gauge and replace the sealing cap and the threaded plug in  
the pressure tap opening.  
UNDer NO CIrCUmSTANCeS ShOULD The GAS INPUT  
eXCeeD The INPUT ShOWN ON The heATer mODeL AND  
rATING PLATe. OVerFIrING COULD reSULT IN DAmAGe  
Or SOOTING OF The heATer.  
h = 1050 Btu  
Btuh = ?  
maintenance  
When checking the Temperature-Pressure relief Valve operation,  
make sure that (1) no one is in front of or around the outlet of the  
Temperature-Pressure relief Valve discharge line, and (2) that  
the water discharge will not cause any property damage, as the  
water may be extremely hot. Use care when operating valve as  
the valve may be hot.  
Venting system  
examine the venting system every six months for obstructions  
and/or deterioration of the vent piping.  
remove all soot or other obstructions from chimney which will  
retard free draft.  
remote storage tank temperature control To check the relief valve, lift the lever at the end of the valve  
several times, see Figure 26. The valve should seat properly and  
operate freely.  
The water temperature in the remote storage tank (if used) is  
controlled by the storage tank temperature control. The sensing  
element is mounted in the hot water storage tank, see Water If after manually operating the valve, it fails to completely reset  
Piping Diagram section.  
and continues to release water, immediately close the cold water  
inlet to the water heater and drain the water heater according to  
the Draining and Flushing instructions on page 27. replace the  
Temperature-Pressure relief Valve with a properly rated/sized new  
one, see Temperature-Pressure relief Valve on pages 13-14 for  
instructions on replacement.  
A change in water temperature in the storage tank lower than  
the tank temperature control setting will cause the sensor to  
activate the circulating pump. The pump then circulates the water  
through the heater where the thermostat senses the drop in water  
temperature and activates main burner operation of the appliance.  
If the storage tank temperature control is out of calibration, replace  
with new control.  
ShOULD OVerheATING OCCUr Or The GAS SUPPLy FAIL  
TO ShUT OFF, TUrN OFF The mANUALGAS CONTrOLVALVe  
TO The APPLIANCe.  
temperature-pressure relief ValVe test  
figure 26  
If the Temperature-Pressure relief Valve on the water heater  
weeps or discharges periodically, this may be due to thermal  
expansion.  
NOTe: excessive water pressure is the most common cause of  
Temperature-Pressure relief Valve leakage. excessive water  
system pressure is most often caused by "thermal expansion"  
in a "closed system." See Closed Water Systems and Thermal  
It is recommended that the Temperature-Pressure relief Valve  
should be checked to ensure that it is in operating condition every  
6 months.  
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expansion on page 13. The Temperature-Pressure relief Valve is  
not intended for the constant relief of thermal expansion.  
draining and flushing  
Temperature-Pressure relief Valve leakage due to pressure build  
up in a closed system that does not have a thermal expansion  
tank installed is not covered under the limited warranty. Thermal  
expansion tanks must be installed on all closed water systems.  
Burn harzard.  
Hot water discharge.  
DO NOT PLUG The TemPerATUre-PreSSUre reLIeF  
VALVe OPeNING. ThIS CAN CAUSe PrOPerTy DAmAGe,  
SerIOUS INJUry Or DeATh.  
Keep hands clear of drain  
valve discharge.  
It is recommended that the water heater storage tank be drained  
and flushed every 6 months to reduce sediment buildup. The  
water heater should be drained if being shut down during freezing  
temperatures.  
to drain the water heater storage tank:  
1. Turn off the electrical supply to the water heater.  
2. Turn off the gas supply at the main Gas Shutoff Valve if  
the water heater is going to be shut down for an extended  
period.  
3. ensure the cold water inlet valve is open.  
4. Open a nearby hot water faucet and let the water run until  
the water is no longer hot.  
hot water odor  
On occasion, hot water may develop a strong odor. If this occurs  
drain the heater completely, flush thoroughly, and refill. If the problem  
persists, chlorination of the heater and replacement of magnesium  
anodes with aluminum anodes may correct the condition.  
5. Close the cold water inlet valve to the water heater.  
6. Connect a hose to the water heater drain valve and terminate  
it to an adequate drain.  
7. Open the water heater drain valve and allow all the water to  
drain from the storage tank.  
Occasionally water softener companies recommend removal of  
heater anodes for odor reasons.  
8. Close the water heater drain valve when all water in the  
storage tank has drained.  
Unauthorized removal of the anode(s) will void the warranty. For  
further information contact your dealer.  
9. Close the hot water faucet opened in Step 4.  
anode rod inspection  
10. If the water heater is going to be shut down for an extended  
period, the drain valve should be left open.  
CAUTION  
Avoid water heater damage.  
to flush the water heater storage tank:  
1. Turn off the electrical supply to the water heater.  
2. ensure the cold water inlet valve is open.  
Property Damage Hazard  
•
•
Inspection and replacement of anode rod required.  
3. Open a nearby hot water faucet and let the water run until  
the water is no longer hot. Then close the hot water faucet.  
The heater tank is equipped with anode rods to provide corrosion  
control. At least once a year the anode rods should be checked 4. Connect a hose to the drain valve and terminate it to an  
to determine if replacement is necessary. Initially the anode rods  
are approximately 7/8” in diameter with a 1/8” diameter steel core  
wire running down the center of the anode material. TheANODeS  
ShOULD Be rePLACeD when the 1/8” diameter core wire is  
visible as this means that the anode material has been expended  
in the control of corrosion.  
adequate drain.  
5. ensure the drain hose is secured before and during the  
entire flushing procedure. Flushing is performed with system  
water pressure applied to the water heater.  
6. Open the water heater drain valve to flush the storage tank.  
7. Flush the water heater storage tank to remove sediment and  
allow the water to flow until it runs clean.  
For models with top inlet and outlet, it is recommended that, before  
removing the inner cover for cleaning, inspection or removal of  
inner parts, you obtain two new nipple collars, part no. 9005783205.  
The nipple collars on the heater will usually be damaged when  
removed. New nipple collars will insure that the seal is such as to  
prevent leakage of flue products when properly installed.  
8. Close the water heater drain valve when flushing is  
completed.  
9. remove the drain hose.  
10. Fill the water heater - see Filling The Water heater in this  
note: Anode rod inspection may need to be made more frequently  
in areas subject to acid rain that obtains their water supply from  
surface water as the low ph will accelerate anode activity.  
manual.  
11. Turn on the electrical supply to place the water heater back  
in operation.  
caution: Close cold water inlet valve serving heater and open  
nearby hot water faucet to relieve the pressure in the heater before  
attempting to remove anode(s) for inspection.  
12. Allow the water heater to complete several heating cycles to  
ensure it is operating properly.  
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NOTe: Un•Lime is not available for use in Canada.  
recommendedprocedureforperiodicremoVal  
of lime deposits from tank type commercial  
water heaters  
hydrochloric base acids are not recommended for use on glass  
lined tanks.  
Observe handling instructions on label of product being used.  
The amount of calcium carbonate (lime) released from water is  
in direct proportion to water temperature and usage, see chart.  
The higher the water temperature or water usage, the more lime  
deposits are dropped out of the water. This is the lime scale  
which forms in pipes, heaters and on cooking utensils.  
tank cleanout procedure  
The following practices will ensure longer life and enable the unit  
to operate at its designed efficiency:  
1. Once a month the heater should be flushed. Open the drain  
valve and allow two gallons of water to drain from the heater.  
Inlet water valve should remain open to maintain pressure in  
tank.  
Lime accumulation not only reduces the life of equipment but also  
reduces efficiency of the heater and increases fuel consumption.  
The usage of water softening equipment greatly reduces the hardness  
of the water. however, this equipment does not always remove all of  
the hardness (lime). For this reason it is recommended that a regular  
schedule for deliming be maintained.  
2. A cleanout opening is provided for periodic cleaning of the  
tank. Gas must be shut off and heater drained before opening  
cleanout.  
The time between cleaning will vary from weeks to months  
depending upon water conditions and usage.  
to clean heater through cleanout opening, proceed as follows:  
3. Drain heater.  
The depth of lime buildup should be measured periodically.  
heaters equipped with cleanouts will have about 2" of lime  
buildup when the level of lime has reached the bottom of the  
cleanout opening. A schedule for deliming should then be set  
up,based on the amount of time it would take for a 1" buildup  
of lime. It is recommended that the water heater initially be  
inspected after 6 months.  
4. remove outer cover plate from lower side of heater jacket.  
5. remove six (6) hex head screws securing tank cleanout plate  
and remove plate.  
6. remove lime, scale, or sediment using care not to damage  
the glass lining.  
7. Inspect cleanout plate gasket, if new gasket is required,  
replace with part no. 9004099215.  
example 1:  
Theinitialinspectionafter6monthsshows1/2"oflimeaccumulation.  
Therefore, the heater should be delimed once a year.  
8. Install cleanout plate. Be sure to draw plate up tight by  
tightening screws securely.  
example 2:  
9. replace outer jacket cover plate.  
Theinitialinspectionafter6monthsshows2"oflimeaccumulation.  
Therefore, the heater should be delimed every 3 months.  
In some water areas the sediment might not be removed by this  
method and may result in the water heater making rumbling or  
boiling noises. To dissolve and remove these more stubborn  
mineral deposits, A. O. Smith UN•LIme Professional Delimer  
should be used.  
deliming using flo-jug method  
UN•LIme in the 5 gallon size is recommended for deliming of all  
models. Contact your local A.O. Smith dealer, distributor or, A.O.  
Smith Water Products Company:  
Telephone: (800) 433-2545  
Fax: (800) 433-2515  
Website: www.hotwater.com/parts  
Prepare the Water Heater  
To delime the water heater using the Flo-Jug method, first  
prepare the heater for deliming.  
Explosion Hazard  
figure 27.  
Flammable hydrogen gases  
may be present.  
deliming solVents  
Keep all ignition sources away  
from faucet when turning on  
hot water.  
A. O. SmithrecommendstheuseofUN•LIme fordeliming. UN•LIme  
is a patented food grade acid which is safe to handle and does not  
create the harmful fumes which are associated with other products.  
UN•LIme may be obtained from your dealer, distributor or A. O.  
Smith Product Service Division. Order Part Number 9005416105,  
1 gallon, packed 4 gallons per case or Part Number 9005417105,  
5 gallon container.  
Do not smoke or have open flame or sparks in vicinity of heater.  
Do not mix UN•LIme with other chemicals. Do not allow contact  
with magnesium, aluminum or galvanized metals.  
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Prepare the Up-N-Down Transfer kit  
The next step is the preparation of the Up-N-Down Transfer kit,  
if you have not already done so:  
Chemical Hazard  
1. With the 5 gallon Up-N-Down container in the vertical position,  
unscrew the plastic vent cap in the handle and pierce the  
plastic membrane over the vent boss under the cap to allow  
the container to vent.  
• Product contains phosphoric acid.  
• Keep out of reach of children.  
• Use rubber or neoprene gloves.  
note: If your container does not have the vent cap and vent  
boss, drill a 3/16” hole in the handle. When you have finished  
deliming you will be able to plug this drilled vent with the  
stainless steel screw that is supplied with the kit.  
UN•LIme contains phosphoric acid. In case of external contact,  
flush with cool water. If irritation persists, get medical attention. If  
swallowed, give 1 or 2 glasses of water or milk and call physician.  
2. remove the container’s cap and cut the plastic membrane  
located in the 3/4” IPT opening in the cap. Take care to not  
damage the threads.  
Get immediate medical attention for contact with eyes. keep out  
of reach of children.  
3. Find the 3/4” male adapter, apply teflon tape to the threaded  
end and screw it into the 3/4” IPT opening in the cap.  
note: the use of rubber or neoprene gloVes is  
recommended, especially if you haVe any open  
sores or cuts to aVoid unnecessary irritation  
or discomfort.  
4. Put cap with male adapter back on the container and slide  
3/4” hose over end of male adapter and fasten in place using  
hose clamp provided.  
1. Turn off fuel and/or power supply to heater.Also, turn off power  
to any electrical device or equipment, which is attached, or  
part of the system.  
Delime using Flo-Jug method  
5. Slide the hose clamp over end of hose and slide hose over the  
male adapter in the water heater drain opening and secure in  
place using hose clamp.  
2. Open hot water side of faucet closest to heater and allow  
water to run until it is cool enough to handle safely.  
3. Close cold water inlet valve to heater.  
6. Lift container to the “Pour” Position, see Figure 28, being  
careful to keep the vent in the handle above the liquid level  
and pour the UN•LIme into the heater.  
4. Connect hose to drain valve at bottom of heater and start  
draining heater into suitable floor drain area.  
5. remove relief valve while heater is draining. NOTe: Do not  
replace relief valve until deliming is completed. relief valve  
opening will also act as a vent in case of possible contact  
between the delimer and the anode rod(s), which may  
produce flammable hydrogen-air mixtures.  
7. Lower container, you may have to place the container on its  
empty carton to prevent the UN•LIme from flowing back into  
the container.  
8. Let UN•LIme remain in the heater for 5 minutes and then  
lower the container to the “Drain” Position, see Figure 28.  
6. If relief valve appears to be limed-up, place it in a clean glass or  
plastic container adequate in size so that you can pour enough  
UN•LIme® into the container to cover the valve and allow  
space for foaming. When foaming stops, run fresh cool water  
into the container and rinse the relief valve for a few minutes.  
9. Deliming activity is indicated by foaming on the surface of the  
UN•LIme. If there is deliming activity, repeat steps 6 thru 8.  
Normally, lime removal will be completed within one hour.  
Severe build-up of lime may take longer than an hour to complete  
descaling.  
7. If heater does not drain completely after a reasonable length  
of time, turn off the main water supply valve to stop water from  
entering the tank due to a by-pass problem or defective cold  
water inlet valve. Also, check for clogged drain valve opening.  
heatermustbecompletelydrainedbeforeintroducingUN•LIme.  
Note: To check UN•LIme for continued use, place some scale  
or white chalk in a glass with a small amount of UN•LIme. If  
the material is vigorously dissolved by the UN•LIme, it can be  
reused; if not, the UN•LIme should be replaced.  
8. remove the cleanout cover and place a clean plastic bucket  
next to the cleanout opening.  
Partially open the cold water inlet valve to allow time to  
accomplish the following and then close the valve.  
While the water is being run through the tank, insert a stiff  
wire, copper tube flattened at one end or an opened wire coat  
hanger through the cleanout opening and scrape out any  
loose deposits of scale or sediment. This is an economical  
way to avoid unnecessary usage of the deliming solution.  
repeat the opening and closing of the cold water inlet valve  
as necessary but be sure the heater is completely drained  
when ready to introduce the UN•LIme.  
Upon completion, reinstall the cleanout cover and use a new  
cleanout cover gasket (part number 9004099215).  
remove the drain valve.  
9. Install the long plastic male adapter insert fitting into the drain  
valve opening of heater after applying Teflon tape or paste to  
threads. Tighten firmly by hand and use wrench or adjustable  
pliers to check for secure connection. Do not over tighten to  
avoid damage to threads and fittings.  
figure 28.  
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ignition module system  
system diagnostics  
your water heater is equipped with an ignition module that  
incorporates a diagnostic system to assist in troubleshooting the  
appliance. The indicator codes on the ignition module are as follows:  
Before calling your service agent, the following checklist should  
be examined to eliminate obvious problems from those requiring  
replacement or servicing.  
table 11:  
1 FLASh  
2 FLASheS  
3 FLASheS  
4 FLASheS  
6 FLASheS  
• Check that “main manual gas shutoff valve” is fully open and  
that gas service has not been interrupted.  
System lockout (retries or cycles exceeded)  
Pressure switch stuck close  
Pressure switch stuck open  
Open on high temperature limit switch (eco)  
115 volt AC power reversed (check polarity)  
• Check that after following the appliance OPerATING  
INSTrUCTIONS, the “Top knob” of the appliance gas valve  
is in “ON” position.  
Low flame sense signal (make sure flame sensor is in  
burner flame)  
Check ignitor  
7 FLASheS  
• Check electrical supply to the appliance for possible blown  
(or tripped) fusing or power interruption. Also check the 3  
amp fuse on the front of the digital thermostat (Fig. 2).  
8 FLASheS  
continuous flash -> continuous flame sensed > 5 seconds without  
gas valve  
• Is the water temperature in tank below the thermostat dial  
setting on the appliance thermostat (calling for heat)?  
continuous on -> internal control failure - replace ignition control  
module.  
• It is possible that the high limit (e.C.O.) has functioned to  
shut off the appliance. See high Limit page 7 - high Limit Usethisdiagnosticsysteminconjunctionwiththe“OPerATIONAL  
CheCkLIST” and the “SeQUeNCe OF OPerATION” to  
troubleshoot the appliance.  
Switch for reset procedure. Contact your service agent if limit  
continues to function to shut off appliance.  
serVice  
The installer may be able to observe and correct certain problems  
which may arise when the unit is put into operation. hOWeVer,  
it is recommended that only qualified service agents, using  
appropriate test equipment, be allowed to service the heater.  
electrical serVicing  
LABeL ALL WIreS PrIOr TO DISCONNeCTION WheN  
SerVICING CONTrOLS. WIrING errOrS CAN CAUSe  
ImPrOPer AND DANGerOUS OPerATION.  
As preliminary step, check wiring against diagram, check for  
grounded, broken or loose wires. Check all wire ends to be sure  
that they are making good contact.  
VerIFy PrOPer OPerATION AFTer SerVICING.  
for your information  
moisture from the products of combustion condense on the cooler  
tank surfaces and form drops of water which may fall onto the  
burner or other hot surfaces to produce a “sizzling” or “frying” noise.  
start up conditions  
smoke/odor  
It is not uncommon to experience a small amount of smoke and  
odor during the initial start-up. This is due to burning off of oil  
from metal parts, and will disappear in a short while.  
operational conditions  
smelly water  
The water heater has at least one anode rod for corrosion  
protection of the tank. Certain water conditions will cause a  
reaction between this rod and the water. The most common  
complaint associated with the anode rod is one of a “rotten egg  
smell” in the hot water. The smell is a result of four factors which  
must all be present for the odor to develop:  
strange sounds  
Possible noises due to expansion and contraction of some metal  
parts during periods of heat-up and cool-down do not necessarily  
represent harmful or dangerous conditions.  
Condensation causes sizzling and popping within the burner area  
during heating and cooling periods and should be considered  
normal. See “Condensation” in this manual.  
a. A concentration of sulfate in the supply water.  
b. Little or no dissolved oxygen in the water.  
condensation  
Whenever the water heater is filled with cold water, some  
condensate will form while the burner is on. A water heater may  
appear to be leaking when in fact the water is condensation.  
This usually happens when:  
c. A sulfate reducing bacteria which has accumulated  
within the water heater (this harmless bacteria is  
nontoxic to humans).  
a. A new water heater is filled with cold water for the first time.  
d. An excess of active hydrogen in the tank. This is caused  
by the corrosion protective action of the anode.  
b. Burning gas produces water vapor in water heaters,  
particularly high efficiency models where flue temperatures  
are lower.  
Smelly water may be eliminated or reduced in some water heater  
models by replacing the anode(s) with one of less active material,  
and then chlorinating the water heater tank and all water lines.  
c. Large amounts of hot water are used in a short time and the  
refill water in the tank is very cold.  
Contact the local water heater supplier or service agency for  
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further information regarding anode replacement and this system are used (such as a dishwasher or washing machine). If  
chlorination treatment.  
hydrogen gas is present, there will probably be an unusual sound  
similar to air escaping through the pipe as the hot water faucet  
is opened. There must be no smoking or open flame near the  
faucet at the time it is open.  
If the smelly water persists after the anode replacement and  
chlorination treatment, we can only suggest that chlorination or  
aeration of the water supply be considered to eliminate the water  
problem.  
high water temperature shut off system  
Do not remove the anode leaving the tank unprotected. By doing  
so, all warranty on the water heater tank is voided.  
This water heater is equipped with an automatic reset type high  
limit (energy Cutoff) sensor. The high limit switch interrupts  
the main burner gas flow should the water temperature reach  
203°F (95°C).  
“air” in hot water faucets  
hyDrOGeN GAS: hydrogen gas can be produced in a hot  
water system that has not been used for a long period of time  
(generally two weeks or more). hydrogen gas is extremely  
flammable and explosive. To prevent the possibility of injury  
under these conditions, we recommend the hot water faucet,  
located farthest away, be opened for several minutes before  
any electrical appliances which are connected to the hot water  
The high limit will automatically reset when the water temperature  
drops below 120°F (49°C). After cooling the tank temperature,  
turn off the water heater for at least 10 seconds by using the  
switch on front of the control box. Turn on the water heater. If  
this fails to correct the problem, contact your plumber or service  
representative.  
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seQuence of operation flow chart  
Description of this flow chart can be found in the “SeQUeNCe OF OPerATION” section found on page 23.  
figure 29  
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operational checklist  
remedy  
complaint  
cause  
user  
serVice agent  
Set thermostat dial to a higher  
temperature  
Thermostat set too low.  
*Water not hot enough  
Check continuity and resistance (Ohms)  
of upper and lower temperature probes.  
replace probes if out of specification.  
Upper and/or lower temperature  
probe out of calibration.  
Call service agent  
Set thermostat dial to a higher  
temperature  
Thermostat set too low.  
Check continuity and resistance (Ohms)  
of upper and lower temperature probes.  
replace probes if out of specification.  
Upper and/or lower temperature  
probe out of calibration.  
Call service agent  
*Insufficient hot water  
*See WATer TemPerATUre  
CONTrOL WArNING (on page  
12).  
main manual gas shutoff valve  
partially closed.  
Open main manual gas shutoff  
valve to fullest extent.  
Space usage to give heater time  
to restore water temperature.  
heater too small for demand.  
Check gas input. If incorrect, adjust gas  
pressure or replace burner orifices.  
heater recovery is slower.  
Call service agent  
Water temperature too hot.  
Thermostat set too high.  
Set thermostat to a lower setting.  
Condensation on outside of  
tank, normal.  
heater makes sounds: sizzling.  
Drain a quantity of water through  
drain valve. If rumbling persists, Delime heater.  
call a service agent.  
Sediment accumulation on  
bottom of tank.  
rumbling.  
expansion and contraction -  
normal.  
Ticking or metallic sounds.  
Pounding.  
Drain piping system and refill.  
heater must be off while this is  
being done.  
Air chambers in piping have  
become waterlogged.  
Too much primary air.  
Call service agent.  
Overfired heater; Incorrect  
burners or orifice for type of gas Call service agent.  
used.  
Combustion noises.  
Check and correct as necessary.  
If drain valve cannot be closed  
tightly, replace.  
Drain valve not closed tightly.  
Increase tank temperature  
setting (have service agent add  
a mixing valve if setting will be  
above 120 degrees).  
Possible condensation if tank  
is undersized or stored water is  
below 110 degrees.  
Water leaks.  
If leakage source cannot be  
corrected or identified, call  
service agent.  
Shut off gas supply to heater  
and close cold water inlet valve  
to heater.  
repair or in case of suspected tank  
leakage, be certain to confirm before  
replacing heater.  
Check for sooted flue passage.  
Check for obstructed vent line.  
Check backdraft or lack of draft  
Shut off gas supply to heater  
and call a service agent.  
heater is over fired  
Gas odors.  
Shut off gas supply to heater  
and call gas company at once  
Possible gas leaks.  
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water piping diagrams  
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STORAGE TANK  
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STORAGE TANK  
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manifold kits  
MANIFOLD KITS  
TWO UNIT MANIFOLD KIT  
(PART NO. 9003426205)  
D85500NE/D85500PE  
THREE UNIT MANIFOLD KIT  
(PART NO. 9003427205)  
FOUR UNIT MANIFOLD KIT  
(PART NO. 9003428205)  
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Limited Warranty  
limited warranty  
Reliance Water Heater Company, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater.  
1. THE TANK  
If the glass-lined tank in this water heater shall prove upon examination by the warrantor to have leaked due to natural corrosion from potable water  
therein, during the  
current model. Some government agencies are requiring energy  
of equivalent size and construction, Reliance will provide a model which complies with the regulations of your area, in which case the consumer  
THREE years after initial installation, the warrantor will supply a complete new Reliance water heater of equivalent size and  
standards for water heaters. In the event regulations prohibit sale of a model  
will be charged the difference in price between the like replacement and the energy  
heater will be limited to the unexpired term of the original warranty.  
model required. The warranty on the replacement water  
2. ALL OTHER PARTS  
If within ONE year after initial installation of this water heater, any part or portion shall prove upon examination by the warrantor to be defective in  
material or workmanship, the warrantor will repair or replace such part or portion at its option.  
3. CONDITIONS AND EXCEPTIONS  
This warranty shall apply only when the water heater is installed in accordance with local plumbing and building codes, ordinances and regulations,  
the printed instructions provided with it and good industry practices. In addition, a temperature and pressure relief valve,  
by and  
sanctioned and recognized independent testing agency and approved by the American Society of Mechanical Engineers, must have been installed.  
a.  
This warranty shall apply only when the heater is:  
(1) used at temperatures not exceeding the maximum calibrated setting of its thermostat;  
(2) used at water pressure not exceeding the working pressure shown on the heater;  
(3)  
with potable water, free to circulate at all times and with the tank free of damaging water sediment or scale deposits;  
(4) used in a non-corrosive and non-contaminated atmosphere;  
(5) used with factory approved anode(s) installed;  
(6) in its original installation location;  
(7) in the United States, its territories or possessions or Canada;  
(8) sized in accordance with proper sizing techniques for commercial and/or residential water heaters;  
(9) bearing a rating plate which has not been altered, defaced or removed, except as required by the warrantor;  
(10) used in an open system or in a closed system with properly sized and installed thermal expansion tank;  
(11) operated with properly installed dirt leg;  
(12)  
(13)  
with the fuel for which it was factory built;  
at the factory rated input;  
(14) operated with the inner and outer combustion chamber doors in place.  
b. Any accident to the water heater, any misuse, abuse (including freezing or thermal expansion damage) or alteration of, any operation in a  
form, or any attempt to repair tank leaks will void this warranty.  
c. This warranty is void if a device acting as a  
prevention device (check valves etc.) is installed in the cold water supply the heater is con-  
nected to, unless an effective method of controlling thermal expansion is also installed at the heater(s) and operational at all times. The relief  
valve installed on the heater is not an acceptable method.  
4. SERVICE AND REPAIR EXPENSES  
Under the limited warranty the warrantor will provide only a replacement water heater or part thereof. The owner is responsible for all other costs.  
Such costs may include but are not limited to:  
a. Labor charges for service removal, repair or reinstallation of the water heater or any component part;  
b. Shipping, delivery, handling, and administrative charges for forwarding the new heater or replacement part from the nearest distributor and  
returning the claimed defective heater or part to such distributor.  
c. All cost necessary or incidental for any material and/or permits required for installation of the replacement heater or part.  
5. LIMITATIONS ON IMPLIED WARRANTIES  
Implied warranties, including the warranty of merchantability imposed on the sale of this heater under state law or local code are limited to one (1)  
year duration for the heater or any of its parts. Some areas do not allow limitation on how long an implied warranty lasts, so the above limitation may  
not apply to you.  
6. CLAIM PROCEDURE  
Any claim under the warranty should be initiated with the dealer who sold the heater, or with any other dealer handling the warrantor’s products. If  
this is not practicable, the owner should contact:  
U.S. Customers  
Reliance Water Heater Company  
500 Tennessee Waltz Parkway  
Ashland City, TN 37015  
Telephone: (800) 365-4054  
a. The warrantor will only honor replacement with identical or similar water heater or parts thereof which are manufactured or distributed by the  
warrantor.  
b. Dealer replacements are made subject to in-warranty validation by warrantor.  
7. DISCLAIMERS  
NO OTHER EXPRESS WARRANTY HAS BEEN OR WILL BE MADE IN BEHALF OF THE WARRANTOR WITH RESPECT TO THE MERCHANT-  
ABILITY OF THE HEATER OR THE INSTALLATION, OPERATION, REPAIR OR REPLACEMENT OF THE HEATER. THE WARRANTOR SHALLNOT  
BE RESPONSIBLE FOR WATER DAMAGE, LOSS OF USE OF THE UNIT, INCONVENIENCE, LOSS OR DAMAGE TO PERSONAL PROPERTY  
OR OTHER CONSEQUENTIAL DAMAGE. THE WARRANTOR SHALL NOT BE LIABLE BY VIRTUE OF THIS WARRANTY OR OTHERWISE FOR  
DAMAGE TO ANY PERSONS OR PROPERTY, WHETHER DIRECT OR INDIRECT, AND WHETHER ARISING IN CONTRACT OR IN TORT.  
a. Some areas do not allow the exclusion or limitation of the incidental or consequential damage, so the above limitations or exclusions may not  
apply to you.  
b. This warranty gives you  
legal rights, and you may also have other rights which vary from area to area.  
Fill in the following for your own reference. Keep it. Registration is not a condition of warranty. The model and serial number are found on the heater’s  
rating plate.  
Model No. ____________________Serial No. _____________________________________________Date Installed__________________________  
Dealer’s Name____________________________________________________________________________________________________________  
Dealer’s Address ________________________________________________________________________ Phone No.________________________  
City and State __________________________________________________________________________ Zip _____________________________  
KEEP THIS WARRANTY POSTED ADJACENT TO THE HEATER FOR FUTURE REFERENCE.  
50  
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notes  
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500 Tennessee Waltz Pkwy., Ashland City, TN 37015  
Technical Support: 800-365-4054 • Parts: 800-821-2017 • Fax (Parts Orders): 1-800-644-9306  
www.reliancewaterheaters.com  
Copyright © 2010 reliance Water heaters. All rights reserved.  
Download from Www.Somanuals.com. All Manuals Search And Download.  

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