COMMERCIAL GAS WATER HEATERS
Instruction Manual
PRINTED 0714 195047-003
PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.
MODELS GPG/GPV-540A, 650A AND 740A
SERIES 104/105
INSTALLATION - OPERATION - SERVICE
- MAINTENANCE - LIMITED WARRANTY
Read and understand this instruction
manual and the safety messages
herein before installing, operating or
servicing this water heater.
Failure to follow these instructions and
safety messages could result in death
or serious injury.
This manual must remain with the
water heater.
Low Lead Content
7KDQN\RXIRUEX\LQJWKLVHQHUJ\HI¿FLHQWZDWHUKHDWHU
:HDSSUHFLDWH\RXUFRQ¿GHQFHLQRXUSURGXFWV
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 neighbors phone. Follow the
gas suppliers instructions.
If you cannot reach your gas supplier,
call the fire department.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
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WATER HEATER INSTALLATION 24
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Heater Wiring25-26
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6(59,&( 38
(OHFWULFDO6HUYLFLQJ 38
7528%/(6+227,1*38-39
)25<285,1)250$7,21 40
6WDUWXS&RQGLWLRQV 40
2SHUDWLRQDO&RQGLWLRQV 40
:$7(53,3,1*',$*5$0641-55
0$1,)2/'.,76 56
5(3/$&(0(173$576/,6757-58
:$55$17< 59
TABLE OF CONTENTS
6$)(,167$//$7,2186($1'6(59,&( 3
APPROVALS 3
*(1(5$/6$)(7<,1)250$7,214-5
3UHFDXWLRQV 5
*URXQGLQJ,QVWUXFWLRQV 5
+\GURJHQ*DV)ODPPDEOH 5
,1752'8&7,21 6
$EEUHYLDWLRQV8VHG 6
4XDOL¿FDWLRQV 6
6WDUW8S5HTXLUHPHQWV 6
Preparing for the Installation 6
)($785(6$1'&20321(176 7
+LJK/LPLW6ZLWFK 7
(OHFWURQLF,JQLWLRQ&RQWURO 7
%DURPHWULF'UDIW&RQWURO 7
&RPEXVWLRQ&KDPEHU2EVHUYDWLRQ3RUW 7
8QFUDWLQJ 7
,167$//$7,21&216,'(5$7,216 8-12
5RXJK,Q'LPHQVLRQV 8
/RFDWLQJ7KH:DWHU+HDWHU 10
&OHDUDQFHV 10
Insulation Blanket11
+DUG:DWHU11
&LUFXODWLRQ3XPSV11
+LJK$OWLWXGH,QVWDOODWLRQV 12
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14
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8QFRQ¿QHG6SDFH 16
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9(17,1*,167$//$7,21 16-19
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2XWGRRU$LU7KURXJK2QH2SHQLQJ 16-17
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Venting17-18
3
SAFE INSTALLATION, USE AND SERVICE
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DANGER
WARNING
CAUTION
CAUTION
DANGER indicates an imminently
hazardous situation which, if not avoided,
will result in injury or death.
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.
WARNING indicates a potentially hazardous
situation which, if not avoided, could result
in injury or death.
CAUTION indicates a potentially hazardous
situation which, if not avoided, could result in
minor or moderate injury.
CAUTION used without the safety alert
symbol indicates a potentially hazardous
situation which, if not avoided, could result in
property damage.
APPROVALS
Note: $60(FRQVWUXFWLRQLVRSWLRQDORQWKHZDWHUKHDWHUVFRYHUHGLQWKLVPDQXDO
Low Lead Content
4
GENERAL SAFETY INFORMATION
Fire Hazard
For continued protection against
risk of fire:

Do not install water heater on
carpeted floor.

Do not operate water heater if
any part has been exposed to
flooding or water damage.
Fire or Explosion Hazard
Read instruction manual before
installing, using or servicing
water heater.
Avoid all ignition sources if you smell gas.
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
Use only the gas shown on the water heater rating label.
Keep ignition sources away from faucets after extended
periods of non-use.
Maintain required clearances to combustibles.
Do not expose water heater controls to excessive gas
pressure.
Property Damage Hazard
All water heaters eventually leak.
Do not install without adequate drainage.
CAUTION
Fire and Explosion Hazard
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.
Use joint compound or Teflon tape
compatible with propane gas.
Fire and Explosion Hazard
Turn off gas lines during installation.
Contact a qualified installer or service
technician for installation and service.
Excessive gas pressure to gas valve can
cause serious injury or death.
Do not use water heater with any gas
other than the gas shown on the rating
label.
Turn off power to the water heater
before performing any service.
Electrical Shock Hazard
Label all wires prior to disconnecting
when performing service. Wiring errors
can cause improper and dangerous
operation.
Verify proper operation after servicing.
Failure to follow these instructions can
result in personal injury or death.
Jumping out control circuits or components can
result in property damage, personal injury or death.
Service should only be performed by a qualified service
technician using proper test equipment.
Altering the water heater controls and/or wiring in any way
could result in permanent damage to the controls or water
heater and is not covered under the limited warranty.
Any bypass or alteration of the water
heater controls and/or wiring will result
in voiding the water heater 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.
5
PRECAUTIONS
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GROUNDING INSTRUCTIONS
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HYDROGEN GAS FLAMMABLE
Explosion Hazard
Flammable hydrogen gases
may be present.
Keep all ignition sources away
from faucet when turning on
hot water.
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GENERAL SAFETY INFORMATION
Verify the power to the water heater is turned off before performing any service procedures.
Read and understand this instruction
manual and the safety messages
herein before installing, operating or
servicing this water heater.
Failure to follow these instructions and
safety messages could result in death
or serious injury.
This manual must remain with the
water heater.
Water temperature over 125°F (52°C)
can cause severe burns instantly
resulting in severe injury or death.
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.
Explosion Hazard
Overheated water can cause
water tank explosion.
Properly sized temperature and
pressure relief valve must be
installed in the opening provided.
Improper installation, use and service may result
in property damage.

Do not operate water heater if any part has been exposed
to flooding or water damage.

Inspect 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.
Refer to this manual for installation and service.
CAUTION
GENERAL SAFETY INFORMATION
6
INTRODUCTION
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DIGITAL THERMOSTAT
FIGURE 1.
ELECTRONIC IGNITION CONTROL
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Explosion hazard. Can cause
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it gets wet. Never try to use a
device that has been wet - replace it.
MPLS., MN 55422
ASSEMBLED IN MEXICO
S8600M
CONTINUOUS RE-TRY
100% SHUTOFF IP
90 SEC. TRIAL FOR IGNITION
24V, 60Hz
PV=1A MAX., MV=1A MAX
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vent damper, It will only work
with damper connected.
IGNITION MODULE
FIGURE 2.
BAROMETRIC DRAFT CONTROL
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FIGURE 3.
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FIGURE 4.
UNCRATING
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FEATURES AND COMPONENTS
8
ROUGH IN DIMENSIONS
INSTALLATION CONSIDERATIONS
STANDARD BAROMETRIC DRAFT CONTROL
GPG MODELS
HORIZONTAL & DIRECT VENTING
GPV MODELS
MAXIMUM TOTAL 75
EQUIVALENT FEET INTAKE
AND EXHAUST ALLOWED.
FIGURE 5.
TABLE 1 . MODELS GPG/GPV-540A THROUGH GPG/GPV-740A
Models A B C D E F G H I
Gas
Conn.
Approx.
Ship. Wt.
*3**39
540A
 73  96 93   1* 950
  819 229 152 673  749   431 kg
*3**39
650A
 73  98 93   1* 950
  819 229 203 673  749   431 kg
*3**39
740A
 73  98 93   1* 950
  819 229 203 673  749   431 kg
0LQLPXPJDVVXSSO\SLSHLV´UHIHUHQFH7DEOHIRUJDVVXSSO\SLSHVL]H
9
TABLE 2. HEATER PERFORMANCE DATA GPG/GPV MODELS
Models
Storage
Capacity
U.S. Gals. (Litres)
Input Rating
BTU/HR.
Nat.
Recovery Rating
GPH
100°F Rise*
Recovery Rating
GPH
140°F Rise*
Current Draw
120V
GOHz 1 Phase
*3**39$

  374
$PSV
*3**39$

 630 450
*3**39$

 718 512
%DVHGRQWKHUPDOHI¿FLHQF\
NOTE: 7RFRPSHQVDWHIRUWKHHIIHFWVRIKLJKDOWLWXGHDUHDVDERYHIHHWUHFRYHU\UDWLQJVVKRXOGEHUHGXFHGDSSUR[LPDWHO\
IRUHYHU\IHHWDERYHVHDOHYHO
TABLE 3. GAS AND ELECTRICAL CHARACTERISTICS
0RGHO 7\SHRI*DV
*DV6XSSO\3UHVVXUH
*DV0DQLIROG3UHVVXUH 9ROWV+] $PSHUHV0LQLPXP 0D[LPXP
$OO0RGHOV Natural :&N3D :&N3D :&N3D  <5
$OOPRGHOVDUHDYDLODEOHLQ1DWXUDO*DVRQO\
Model GPG/GPV-540A GPG/GPV-650A GPG/GPV-740A
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*DV2UL¿FH6L]H ´ ´ 1$
$LU,QOHW'DPSHU'LDO6HWWLQJ 3** 
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INSTALLATION CONSIDERATIONS
10
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LOCATING THE WATER HEATER
Property Damage Hazard
All water heaters eventually leak.
Do not install without adequate drainage.
CAUTION
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Fire or Explosion Hazard
Read instruction manual before
installing, using or servicing
water heater.
Avoid all ignition sources if you smell gas.
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
Use only the gas shown on the water heater rating label.
Keep ignition sources away from faucets after extended
periods of non-use.
Maintain required clearances to combustibles.
Do not expose water heater controls to excessive gas
pressure.
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INSTALLATION CONSIDERATIONS
11
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CIRCULATION PUMPS
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CIRCULATING PUMP WIRING DIAGRAM
STORAGE TANK OR BUILDING RECIRCULATION
FIELD SUPPLIED TEMPERATURE CONTROL
INSTALLED IN THE STORAGE TANK
OR CIRCULATING LOOP RETURN LINE
CIRC
PUMP
MOTOR
L1 HOT
L2 NEUTRAL
120 VAC
POWER
NOTE: USE SEPARATE 120 VAC POWER
SUPPLY FOR PUMP CIRCUIT. DO NOT
SHARE POWER WITH WATER HEATER AS THIS
MAY CAUSE ELECTRICAL LINE NOISE AND
LEAD TO ERRATIC CONTROL SYSTEM
OPERATION.
FIGURE 8.
CIRCULATING PUMP WIRING DIAGRAM
DISHWASHER LOOP WITH TOGGLE SWITCH
FIELD SUPPLIED TEMPERATURE
CONTROL INSTALLED IN THE
CIRCULATING LOOP RETURN LINE
DISHWASHER
TOGGLE
SWITCH
CIRC
PUMP
MOTOR
L1 HOT
L2 NEUTRAL
120 VAC
POWER
NOTE: USE SEPARATE 120 VAC POWER
SUPPLY FOR PUMP CIRCUIT. DO NOT SHARE
POWER WITH WATER HEATER AS THIS MAY
CAUSE ELECTRICAL LINE NOISE AND LEAD
TO ERRATIC CONTROL SYSTEM OPERATION.
FIGURE 9.
FIGURE 7.
INSULATION BLANKET
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.
Breathing Hazard - Carbon Monoxide Gas
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HIGH ALTITUDE INSTALLATIONS
Fire and Explosion Hazard
Gas and carbon monoxide detectors are
available.
Overfiring could result in fire or
explosion.
Under no circumstances should the
input exceed the rate shown on the
water heater’s rating label.
Breathing Hazard - Carbon Monoxide Gas
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
Under no circumstances should
the input exceed the rate shown
on the water heater’s rating label.
Overfiring could result in damage to
the water heater and sooting.
Gas and carbon monoxide detectors
are available.
13
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WATER TEMPERATURE CONTROL AND MIXING VALVES
Water temperature over 125°F (52°C)
can cause severe burns instantly
resulting in severe injury or death.
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.
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Breathing Hazard - Carbon Monoxide Gas
Install water heater in accordance with
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Breathing Hazard - Carbon Monoxide Gas
Install water heater in accordance with
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To avoid injury, combustion and ventilation
air must be taken from outdoors.
Do not place chemical vapor emitting
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NOTE: $QHJDWLYHGUDIW´WR´ZFPXVWEHPDLQWDLQHGLQ
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WKHFKLPQH\GUDIWLPSRVHGRQWKHKHDWHU
PROPER DRAFT CONTROLLER AND
VENT PIPE INSTALLATION
FIGURE 16.
VENT CONNECTION
9HQWFRQQHFWLRQVPXVWEHPDGHWRDQDGHTXDWHVWDFN
RUFKLPQH\5HIHUWRWKH1DWLRQDO)XHO*DV&RGHFXUUHQW
HGLWLRQ RU WR WKH YHQW SLSH PDQXIDFWXUHU¶V JDV YHQW DQG
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V\VWHP5HIHUWR7DEOHIRUWKHYHQWSLSHVL]HUHTXLUHGIRU
LQVWDOODWLRQWRWKHEDURPHWULFGUDIWFRQWURODVVHPEO\RXWOHW
TABLE 5. BAROMETRIC DRAFT CONTROL
ASSEMBLY OUTLET SIZE
Model Flue Outlet
*3*$ ƎPP
*3*$ ƎPP
*3*$ ƎPP
:KHUHDQH[LVWLQJFKLPQH\RUYHQWLVWREHXVHGEHVXUHWKDW
WKHFKLPQH\RUYHQWKDVDGHTXDWHFDSDFLW\ IRU WKHQXPEHU
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WKHFKLPQH\RUYHQWDQGUHPRYHDOOVRRWRURWKHUREVWUXFWLRQV
ZKLFKZLOOUHWDUGIUHHGUDIW
19
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RUHTXLYDOHQW
DIRECT VENTING - FOR BTPV MODELS
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TABLE 8.
Selkirk Metalbestos Model PS
Clearance to Combustibles
Interior PP
([WHULRU PP
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PXVWEHDGHTXDWHO\VXSSRUWHGWRDYRLGXQQHFHVVDU\VWUHVVRQ
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TABLE 9.
Dimension in Inches (mm) GPV-540A thru 740A
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90° 4
45° 8
0D[LPXP1XPEHU2I(OERZV([KDXVW
90° 4
45° 8
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CAUTION
Use only the vent hood supplied with this kit. Only supplied hood
provides required clearances from combustibles, both through
the wall and the exterior siding. Termination of a sidewall vent
system with a device other than the supplied vent hood could
affect system performance and result in a safety hazard.
IMPORTANT
3ODQ WKH OD\RXW RI WKH YHQW V\VWHP EDFNZDUG IURP WKH YHQW
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BEWARE OF CONCEALED WIRING AND PIPING INSIDE
OF WALL. REFER TO TABLE 7 FOR THE MAXIMUM WALL
THICKNESS “B” FOR EACH MODEL.
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VXSSRUWLQJYHQWV\VWHPDQGNHHSLQJWKHQXPEHURIRIIVHWVWR
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20
TERMINATION CLEARANCES SIDEWALL POWER VENT
V X
VENT TERMINAL AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED
v
v
A
G
V
F
IXED
CLOSED
FIXED
CLOSED
OPERABL
E
OPERABL
E
V
C
B
B
B
B
F
B
V
V
A
J
V
H
M
X
X
V
V
K
B
E
D
L
POWER VENT
(using room air for combustion)
EXTERIOR CLEARANCES FOR SIDEWALL VENT TERMINATION
FIGURE 18A
9HQWWHUPLQDOFOHDUDQFHVIRU³3RZHU9HQW´LQVWDOODWLRQV3RZHU9HQWFRQ¿JXUDWLRQVXVHURRPDLUIRUFRPEXVWLRQ
CANADIAN INSTALLATIONS
1
US INSTALLATIONS
2
CANADIAN INSTALLATIONS
1
US INSTALLATIONS
2
A
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