A.O. Smith ATX-199 User manual

100288348 2000546134 (Rev. B)
KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
COMMERCIAL GAS WATER HEATER
• For Your Safety •
AN ODORANT ISADDED TO THE GAS USED
BY THIS WATER HEATER.
MODELS (A/S/M) TX-199
SERIES 100 & 101
INSTALLATION - OPERATION -
SERVICE - MAINTENANCE
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.
Instruction Manual
R
DR
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.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
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PRINTED 0917

2
TABLE OF CONTENTS
GENERAL SAFETY INFORMATION..........................................4
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*URXQGLQJ,QVWUXFWLRQV ...........................................................4
+\GURJHQ*DV)ODPPDEOH .....................................................4
INTRODUCTION........................................................................6
$EEUHYLDWLRQV8VHG ................................................................6
4XDOL¿FDWLRQV..........................................................................6
3UHSDULQJIRUWKH,QVWDOODWLRQ ..................................................6
FEATURES AND COMPONENTS .............................................7
%DVLF2SHUDWLRQ......................................................................7
INSTALLATION CONSIDERATIONS .......................................10
5RXJK,Q'LPHQVLRQV...........................................................10
/RFDWLQJWKH:DWHU+HDWHU ...................................................11
Vent Piping Options..............................................................12
+DUG:DWHU ...........................................................................12
&LUFXODWLRQ3XPSV ................................................................12
INSTALLATION REQUIREMENTS ..........................................13
*DV6XSSO\3UHVVXUH5HTXLUHPHQWV....................................13
6XSSO\*DV5HJXODWRU ..........................................................14
3RZHU6XSSO\ .......................................................................14
0L[LQJ9DOYHV .......................................................................14
'LVKZDVKLQJ0DFKLQHV .......................................................15
&ORVHG:DWHU6\VWHPV.........................................................15
7KHUPDO([SDQVLRQ ..............................................................15
6DIHW\9DOYH5HTXLUHPHQWV..................................................16
&RQGHQVDWH'UDLQ ................................................................17
&RPEXVWLEOH0DWHULDO6WRUDJH..............................................17
9HQWLODWLRQ5HTXLUHPHQWV .....................................................18
'LUHFW9HQW,QVWDOODWLRQV........................................................22
6LQJOH9HQW,QVWDOODWLRQV.......................................................23
6WDLQOHVV6WHHO9HQW,QVWDOODWLRQV .........................................24
&RPPRQ'LUHFW9HQWLQJ5HTXLUHPHQWV................................26
&RPPRQ'LUHFW9HQWLQJ6\VWHP ..........................................26
&RQFHQWULF7HUPLQDWLRQ,QVWDOODWLRQ3UHSDUDWLRQ...................28
$LU5HTXLUHPHQWV .................................................................30
INSTALLATION REQUIREMENTS - COMMONWEALTH OF
MASSACHUSETTS..................................................................32
,QVWDOOLQJ&DUERQ0RQR[LGH'HWHFWRUV .................................32
$SSURYHG&DUERQ0RQR[LGH'HWHFWRUV ................................32
Signage................................................................................32
,QVSHFWLRQ.............................................................................32
([HPSWLRQV ..........................................................................32
0DQXIDFWXUHU5HTXLUHPHQWV*DV(TXLSPHQW9HQWLQJ
6\VWHP3URYLGHG ..................................................................32
0DQXIDFWXUHU5HTXLUHPHQWV*DV(TXLSPHQW9HQWLQJ
6\VWHP1RW3URYLGHG ...........................................................32
HIGH-ALTITUDE INSTALLATIONS..........................................33
7HUPLQDWLRQ&OHDUDQFHVIRU6LGHZDOO,QVWDOODWLRQV................34
&OHDUDQFHV)RU5RRIWRS7HUPLQDWLRQV..................................36
WATER HEATER INSTALLATION.........................................37
:DWHU+HDWLQJ8QLW&RQGHQVDWH'UDLQ..............................37
6XSSO\*DV/LQH,QVWDOODWLRQ..............................................39
0HDVXULQJ,QOHW*DV3UHVVXUH...........................................42
6XSSO\*DV3UHVVXUH$GMXVWPHQW .....................................42
*DV/LQH&RQQHFWLRQ.........................................................43
Gas Line Leak Testing.......................................................43
Purging..............................................................................43
(OHFWULFDO&RQQHFWLRQV.......................................................43
:DWHU/LQH&RQQHFWLRQV....................................................44
739DOYH'LVFKDUJH3LSH ................................................44
TEMPERATURE REGULATION ...........................................46
+LJK7HPSHUDWXUH/LPLW&RQWURO(&2 .............................46
7KHUPRVWDW&RQWURO ...........................................................46
)LULQJ5DWH0RGXODWLRQ ......................................................46
+LJK7HPSHUDWXUH$SSOLFDWLRQV .........................................46
CONTROL SYSTEM OPERATION .......................................47
7HPSHUDWXUH5HPRWH&RQWUROOHU........................................47
START UP.............................................................................49
Prior to Start up.................................................................49
,QLWLDO2SHUDWLRQ .................................................................49
)ORZ5DWHV ........................................................................49
Lighting the Water Heater .................................................50
1RUPDO2SHUDWLRQ..............................................................52
6HWWLQJWKH2XWOHW:DWHU7HPSHUDWXUH...............................52
'HIDXOW2XWOHW7HPSHUDWXUH ...............................................53
Setting Units of Measure...................................................53
)UHH]H3URWHFWLRQ6\VWHP.................................................53
TROUBLESHOOTING ..........................................................54
,QVWDOODWLRQ&KHFNOLVW .........................................................54
2SHUDWLRQDO3UREOHPV .......................................................54
5HSODFHPHQW3DUWV............................................................56
*HQHUDO)DXOWDQG$OHUW&RQGLWLRQV ...................................56
7URXEOHVKRRWLQJ&KDUW.......................................................57
(UURU&RGHV.......................................................................58
:DWHU+HDWLQJ8QLW&RQWUROOHU)DXOWDQG$OHUW&RQGLWLRQV .59
MAINTENANCE ....................................................................61
*HQHUDO .............................................................................61
3UHFDXWLRQV .......................................................................61
:DWHUKHDWLQJXQLW0DLQWHQDQFHDQG6HUYLFH....................61
'UDLQ9DOYH........................................................................63
9HQW6\VWHP0DLQWHQDQFH ................................................63
DIAGRAMS ...........................................................................64
:LULQJ'LDJUDP .................................................................64
&LUFXODWLRQ3XPS:LULQJ'LDJUDPV ...................................65
:DWHU3LSLQJ'LDJUDPV .....................................................66

3
SAFE INSTALLATION, USE, AND SERVICE
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others.
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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
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4
PRECAUTIONS
DO NOT USE THIS WATER HEATER IF ANY PART HAS
BEEN EXPOSED TO FLOODING OR WATER DAMAGE.
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GROUNDING INSTRUCTIONS
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the National Electrical CodeDQGRUORFDOFRGHV7KHVH
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operation.
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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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SUREDEO\EHDQXQXVXDOVRXQGVXFKDVDLUHVFDSLQJWKURXJK
WKHSLSHDVWKHZDWHUEHJLQVWRÀRZTHERE SHOULD BE
NO SMOKING OR OPEN FLAME NEAR THE FAUCETAT
THE TIME IT IS OPEN.
GENERAL SAFETY INFORMATION
Verify the power to the water heater is turned off before performing any service
procedures. The Enable /Disable switch on front panel disables the 24-volt gas valve.
Electrical supply must be turned off at circuit breaker serving water heater.
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 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

5
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.
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
Property Damage Hazard
All water heaters eventually leak.
•
Do not install without adequate drainage.
•
CAUTION
Turn off power at the branch circuit
breaker serving 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.
•
Fire Hazard
Do not install water heater on
carpeted floor.
Do not operate water heater if
exposed to flooding or water
damage.
For continued protection against
risk of fire:
Fire and Explosion Hazard
Leak test gas connections before
placing water heater in operation.
Disconnect gas piping at main
gas shutoff valve before leak
testing heater.
Install sediment trap in
accordance with NFPA 54 or
CAN/CSA B149.1.
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
agency 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.
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 appliance warranty.

6
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INTRODUCTION
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7) LQ WKLV PDQXDO 8VH WKLV UHIHUHQFH WR ORFDWH
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UHTXLUHPHQWVLQLocating the Water Heater (page 11)
DQGWKHRough-In Dimensions (page 10).

7
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FEATURES AND COMPONENTS
BASIC OPERATION
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at the top of the tank.
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point. See Figure 3.
1
2
3
2
4
56
7
8
Figure 1. TX1 Components
1. +RW:DWHU2XWOHW)LWWLQJ
2. 3LSLQJIURP:DWHU+HDWLQJ8QLWWR7DQN
3. Water Heating Unit
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5. 3XPS
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7. &RQWUROOHU
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2.00: State Plumbing Code DQG 248-CMR 5. See
Installing Carbon Monoxide Detectors (page 32).

8
Figure 2. Water Heater Function
1. *DV6XSSO\9DOYH
2. &RQWUROOHU
3. &ROG:DWHUIURP%RWWRPRI7DQN
4. 3XPS
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6. Water Heating Unit
WATER HEATING UNIT COMPONENTS
1
2
3
4
5
6
7
8
910
11
12
13
14
15
16
17
18
Figure 3. Water Heating Unit
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2. ([KDXVW7KHUPLVWRU
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4. %\SDVV9DOYH
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9. &ROG:DWHU,QOHW7KHUPLVWRU
10. &ROG:DWHU,QOHW
11. *DV6XSSO\,QOHW
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13. Fan Motor
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15. Igniter
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17. 6HFRQGDU\+HDW([FKDQJHU
18. Exhaust Port

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1
2
3
5
789
6
4
Figure 4. Igniter Assembly
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2. 5RGKROGHUJDVNHW
3. )ODPHURG
4. )ODPHURGZLUH
5. 5RGKROGHU
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7. ,JQLWHUURG
8. 5RGFDS
9. ,JQLWHUDVVHPEO\
Flame Sensor
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MODULATION
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BURNER ASSEMBLY
Spark Igniter
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LJQLWHUZKLFKLQWXUQLJQLWHVWKHPDLQEXUQHUDLUJDVPL[WXUH

10
ROUGH-IN DIMENSIONS
E
AF
Combustion Air Inlet
and Exhaust Outlet
Hot Water Outlet
Drain
Valve
C
D
B
G
T&P Valve
Supply Gas Connection
Cold Water Inlet
Figure 5. Rough-in Dimensions
Table 1. Dimensions APPROX.
SHIP WEIGHT
ABCDEF G
,QFKHVFP ,QFKHVFP ,QFKHVFP ,QFKHVFP ,QFKHVFP ,QFKHVFP ,QFKHVFP LBS (KG)
72 (183) 58.7 (149) 41 (104) 11.8 (30) 4.3 (11) 61.38 30 (76) 520(236)
Table 2. GAS PRESSURE REQUIREMENTS
*Manifold Pressure Minimum Supply Pressure Maximum Supply Pressure
NATURAL GAS PROPANE GAS NATURAL GAS PROPANE GAS NATURAL GAS PROPANE GAS
2.95" W.C. (0.73 kPa) 3.3" W.C. (0.82 kPa) ´:&N3D ´:&N3D ´:&N3D ´:&N3D
Table 3. RECOVERY CAPACITIES
U. S. Gallons/hr & liters/hr at temperature rise indicated
Type of
Gas Input Thermal
(I¿FLHQF\
°F 30°F 40°F 50°F 60°F 70°F 80°F 90°F 100°F 110°F 120°F* 130°F* 140°F*
Btu/hr kW °C 17°C 22°C 28°C 33°C 39°C 44°C 50°C 56°C 61°C 67°C 72°C 78°C
1DWXUDO 199000 58.32 96 GPH 772 579 463 386 331 289 257 232 211 193 178 165
Propane LPH 2922 2192 1753 1461 1253 1094 973 878 799 731 674 625
LQOHWZDWHU)&
INSTALLATION CONSIDERATIONS

11
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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ZKHUHJDVROLQHRWKHUÀDPPDEOHOLTXLGVRUHQJLQHGULYHQ
HTXLSPHQWRUYHKLFOHVDUHVWRUHGRSHUDWHGRUUHSDLUHG
)ODPPDEOHYDSRUVDUHKHDY\DQGWUDYHODORQJWKHÀRRU
DQGPD\EHLJQLWHGE\WKHZDWHUKHDWHU¶VLJQLWHURU0DLQ
%XUQHUÀDPHVFDXVLQJ¿UHRUH[SORVLRQ
10. )ODPPDEOHLWHPVSUHVVXUL]HGFRQWDLQHUVRUDQ\RWKHU
SRWHQWLDO¿UHKD]DUGRXVDUWLFOHVPXVWQHYHUEHSODFHG
RQRUDGMDFHQWWRWKHZDWHUKHDWHU
CLEARANCE TO COMBUSTIBLE MATERIALS
7KH ZDWHU KHDWHUV FRYHUHG LQ WKLV PDQXDO DUH DSSURYHG
IRULQVWDOODWLRQ RQ FRPEXVWLEOHÀRRULQJ7KHFOHDUDQFH WR
FRPEXVWLEOH DQG QRQ FRPEXVWLEOH FRQVWUXFWLRQ PDWHULDOV
LV]HURLQFKHVRQWKHEDFNDQGVLGHVRIWKHZDWHUKHDWHU
7KHVHZDWHUKHDWHUVDUHDOVRDSSURYHGIRULQVWDOODWLRQLQ
DQDOFRYH
7KHUHLVDWKUHHLQFKPPFOHDUDQFHIURPWKHOHIWDQG
ULJKW VLGHV RI WKH ZDWHU KHDWLQJ XQLW WR FRPEXVWLEOH DQG
QRQFRPEXVWLEOHVXUIDFHV
LOCATING THE WATER HEATER
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SODFHPHQWLVDYHU\LPSRUWDQWFRQVLGHUDWLRQIRUWKHVDIHW\RI
WKHRFFXSDQWVLQWKHEXLOGLQJDQGIRUWKHPRVWHFRQRPLFDO
XVHRIWKHZDWHUKHDWHU
Property Damage Hazard
All water heaters eventually leak.
•
Do not install without adequate drainage.
•
CAUTION
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LWZLOOEHVXEMHFWWRIUHH]LQJWHPSHUDWXUHV
2. /RFDWHWKHZDWHUKHDWHUVRLWLVSURWHFWHGDQGQRWVXEMHFW
WRSK\VLFDOGDPDJHE\DPRYLQJYHKLFOH
3. /RFDWHWKHZDWHUKHDWHURQDOHYHOVXUIDFH
4. /RFDWHWKHZDWHUKHDWHUQHDUD ÀRRUGUDLQ7KHZDWHU
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DUHDDGMDFHQWWRWKHZDWHUKHDWHURUWRORZHUÀRRUVRI
WKHVWUXFWXUH:KHQVXFKORFDWLRQVFDQQRWEHDYRLGHG
LWLVUHFRPPHQGHGWKDWDPHWDOGUDLQSDQDGHTXDWHO\
GUDLQHGEHLQVWDOOHGXQGHUWKHZDWHUKHDWHU
5. /RFDWHWKHZDWHUKHDWHUFORVHWRWKHSRLQWRIPDMRUKRW
ZDWHUXVDJH
6. /RFDWHWKHZDWHUKHDWHUFORVHWRD9$&SRZHUVXSSO\
See Power Supply (page 14)IRUUHTXLUHPHQWV
7. /RFDWHWKHZDWHUKHDWHUZKHUHDQDGHTXDWHVXSSO\RI
IUHVKDLUIRUFRPEXVWLRQDQGYHQWLODWLRQFDQEHREWDLQHG
See Air Requirements (page 30).
8. /RFDWHWKHZDWHUKHDWHUZKHUHWKHYHQWDQGLQWDNHDLU
SLSLQJZKHQLQVWDOOHGZLOOUHPDLQZLWKLQWKHPD[LPXP
HTXLYDOHQWOHQJWKVDOORZHG6HHMaximum Equivalent
Pipe Lengths and Elbows (page 21).

12
0” Min. 0” Min.
4” Min.
0” Min.
3” Min.
Figure 6. Clearances
Top Bottom Front Sides
LQPP LQPP LQPP LQPP
Note: Adequate clearance for servicing
should be maintained on all installations.
See Service Clearance.
WARNING
Maintain all clearances around the water heater. Fail-
XUHWRGRVRFRXOGFUHDWHD¿UHKD]DUGSRWHQWLDOO\
leading to death, serious injury, and/or property
damage.
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KHDWHUE\DWOHDVWWKUHHLQFKHVPPLQDQ\GLUHFWLRQ
RULIWKHZDWHUKHDWHULVLQVWDOOHGLQDQDOFRYHRUFORVHWWKH
HQWLUHÀRRUVKDOOEHFRYHUHGE\WKHSDQHO7KHSDQHOPXVW
EHVWURQJHQRXJKWRFDUU\WKHZHLJKWRIWKHKHDWHUZKHQ
IXOORIZDWHU
SERVICE CLEARANCE
A service clearance of 24 inches (61 cm) should be
maintained from serviceable parts such as the T&P
valve, control system components, gas valve, drain
valve.Aservice clearance of 50 inches (127 cm) should
be maintained from top for anode replacement.
INTAKE AIR AND VENT PIPE CLEARANCES
7KHPLQLPXPFOHDUDQFHIURPFRPEXVWLEOHPDWHULDOVIRUWKH
YHQWH[KDXVWDQGLQWDNHDLUSLSLQJVKDOOEHLQFKHV9HQW
RULQWDNHDLUSLSLQJSDVVLQJWKURXJKDFRPEXVWLEOHZDOORU
FHLOLQJPXVWEHDFRQWLQXRXVUXQQRMRLQWV
VENT PIPING OPTIONS
EXTENDED VENT LENGTH
7KHZDWHUKHDWHUVFRYHUHGE\WKLVPDQXDOFDQEHLQVWDOOHG
XVLQJIRXULQFKSLSHIRUWKHLQWDNHDLUDQGRUYHQWSLSLQJXS
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9HQWWHUPLQDWLRQVDUHVXSSOLHGZLWKWKHKHDWHU
$OOUXQVPXVWFRPSO\ZLWKTable 7 (page 21).
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YHQWWHUPLQDOV
OPTIONAL DIRECT VENT TERMINATIONS
7KHZDWHUKHDWHUVFRYHUHGLQWKLVPDQXDOFDQEHLQVWDOOHG
in a direct vent FRQ¿JXUDWLRQ XVLQJ RSWLRQDO FRQFHQWULF
WHUPLQDWLRQV 6HH Concentric Termination Installation
Preparation (page 28).
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&RQWDFW\RXUORFDOGLVWULEXWRURUFDOOWKHSDUWVGHSDUWPHQW
SKRQHQXPEHUOLVWHGRQWKHEDFNFRYHURIWKLVPDQXDOWR
RUGHU
HARD WATER
:KHUHKDUGZDWHUFRQGLWLRQVH[LVWZDWHUVRIWHQLQJRUWKH
WKUHVKROGW\SHRIZDWHUWUHDWPHQWLVUHFRPPHQGHG7KLVZLOO
SURWHFWWKHGLVKZDVKHUVFRIIHHXUQVZDWHUKHDWHUVZDWHU
SLSLQJDQGRWKHUHTXLSPHQW6HHMaintenance (page 61)
IRUVHGLPHQWDQGOLPHVFDOHUHPRYDOSURFHGXUHV
CIRCULATION PUMPS
$ FLUFXODWLQJ SXPS LV XVHG ZKHQ D V\VWHP UHTXLUHV D
FLUFXODWLQJORRSRUWKHUHLVDVWRUDJHWDQNXVHGLQFRQMXQFWLRQ
ZLWKWKHZDWHUKHDWHU6HHWater Piping Diagrams (page
66)IRULQVWDOODWLRQORFDWLRQRIFLUFXODWLQJSXPSV
:KHQWKHZDWHUKHDWHULVXVHGZLWKDEXLOGLQJUHFLUFXODWLRQ
V\VWHPWKHEXLOGLQJUHFLUFXODWLRQÀRZVKRXOGEHQRJUHDWHU
WKDQ  *30$OVR IRU PD[LPXP HQHUJ\ HI¿FLHQF\ WKH
UHFLUFXODWLRQV\VWHPVKRXOGEHRQDWLPHUVRWKDWLWZRQ¶W
UXQFRQWLQXRXVO\ZLWKRXWDFWXDOKRWZDWHUXVDJH
See Circulation Pump Wiring Diagrams (page 65) for
HOHFWULFDOKRRNXSLQIRUPDWLRQ,QVWDOOLQDFFRUGDQFHZLWKWKH
FXUUHQWHGLWLRQRIWKHNational Electrical CodeNFPA 70
or the Canadian Electrical CodeCSA C22.1.
6WDLQOHVVVWHHOFLUFXODWLQJSXPSVDUHUHFRPPHQGHGIRUXVH
ZLWKFRPPHUFLDOZDWHUKHDWHUV
5HIHUWRWKHFLUFXODWLQJSXPSPDQXIDFWXUHU¶VLQVWUXFWLRQV
IRULWVRSHUDWLRQOXEULFDWLRQDQGPDLQWHQDQFHLQVWUXFWLRQV

13
WARNING
Breathing, Fire, and
([SORVLRQ+D]DUG
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UDWLQJSODWH
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WRUVXVHGDUHRSHUDWLQJSURSHUO\DQG
SURYLGLQJJDVSUHVVXUHVZLWKLQWKH
VSHFL¿HGUDQJHVKRZQEHORZ([FHVV
JDVLQOHWSUHVVXUHPD\FDXVHVHULRXV
DFFLGHQWV
&RQYHUVLRQRIWKLVXQLWIURPQDWXUDO
JDVWRSURSDQHRUYLFHYHUVDZLOOYRLG
DOOZDUUDQWLHV&RQWDFW\RXUORFDOGLV-
WULEXWRUWRJHWWKHFRUUHFWXQLWIRU\RXU
JDVW\SH7KHPDQXIDFWXUHULVQRW
OLDEOHIRUDQ\SURSHUW\DQGRUSHUVRQDO
GDPDJHUHVXOWLQJIURPJDVFRQYHU-
sions.
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FRXOGUHVXOWLQVHYHUHSHUVRQDOLQMXU\
FDUERQPRQR[LGHSRLVRQLQJRUGHDWK
7KHIROORZLQJDUHWKHPLQLPXPDQGPD[LPXPJDVSUHVVXUHV
UHTXLUHGE\DOOPRGHOVRIWKLVDSSOLDQFH
Table 4. Gas Pressure Parameters by Gas Type
Gas type Inlet Gas Pressure
1DWXUDO*DV 0LQ´:&N3D
0D[´:&N3D
Propane 0LQ´:&N3D
0D[´:&N3D
Note: Fuel conversions are not allowed on this product.
7KH JDV YDOYH KDV PLQLPXP JDV VXSSO\ SUHVVXUH OLPLWV
VSHFL¿HG LQ Table 4 7KH PLQLPXP VXSSO\ SUHVVXUH LV
PHDVXUHG ZKLOH JDV LV ÀRZLQJ G\QDPLF SUHVVXUH 7KH
VXSSO\ SUHVVXUH VKRXOG QHYHU IDOO EHORZ WKH PLQLPXP
VSHFL¿HGLQWKHWDEOHIRUHDFKW\SHRIJDV
7KH VXSSO\ SUHVVXUH VKRXOG EH PHDVXUHG ZLWK DOO JDV
¿UHGDSSOLDQFHVFRQQHFWHGWRWKHFRPPRQPDLQ¿ULQJDW
IXOOFDSDFLW\,IWKHVXSSO\SUHVVXUHGURSVPRUHWKDQ´
:&DVJDVEHJLQVWRÀRZWRWKHZDWHUKHDWHUWKHQWKH
VXSSO\JDVV\VWHPLQFOXGLQJWKHJDVOLQHDQGRUWKHJDV
UHJXODWRUPD\EHUHVWULFWHGRUXQGHUVL]HG6HHSupply Gas
Regulator (page 14).
7KH JDV YDOYH KDV PD[LPXP JDV VXSSO\ SUHVVXUH OLPLWV
VSHFL¿HG LQ Table 4 7KH PD[LPXP VXSSO\ SUHVVXUH LV
PHDVXUHGZKLOHJDVLVQRWÀRZLQJVWDWLFSUHVVXUH
8QWLO WHVWLQJ RI WKH PDLQ JDV OLQH VXSSO\ SUHVVXUH LV
FRPSOHWHG HQVXUH WKH JDV OLQH WR WKH ZDWHU KHDWHU LV
GLVFRQQHFWHGWRDYRLGDQ\GDPDJHWRWKHZDWHUKHDWHU
INSTALLATION REQUIREMENTS
GAS SUPPLY PRESSURE REQUIREMENTS
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14
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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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Figure 7 (page 15).
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Table 5. Burn Time At Various Temperatures
Water Temperature
°F (°C) Time for 1st Degree Burn (Less Severe Burns)
iBurns
2nd & 3rd Degree
(Most Severe Burns)
110 (43) QRUPDOVKRZHUWHPS
116 (47) SDLQWKUHVKROG
116 (47) PLQXWHV PLQXWHV
122 (50) PLQXWH PLQXWHV
131 (55) VHFRQGV VHFRQGV
140 (60) VHFRQGV VHFRQGV
149 (65) VHFRQG VHFRQGV
154 (68) instantaneous VHFRQG
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DISH-WASHING MACHINES
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16
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See Water Line Connections (page 44)DQG WKH Water
Piping Diagrams (page 66).
SAFETY VALVE REQUIREMENTS
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storage tank
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WKHFRGHUHTXLUHPHQWVRIASME.
Explosion Hazard
Temperature-Pressure Relief Valve
must comply with ANSI Z21.22-
CSA 4.4 andASME code.
Properly sized temperature-
pressure relief valve must be
installed in opening provided.
Can result in overheating and
excessive tank pressure.
Can cause serious injury or death.
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17
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Closed Water Systems (page 15).
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PDQXDOIRUWHFKQLFDODVVLVWDQFH
CONDENSATE DRAIN
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VDIHO\ 7KH FRQGHQVDWH DFFXPXODWHV DV D E\SURGXFW RI
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HOHYDWHGDERYHWKHFRQGHQVDWHGUDLQFRQQHFWLRQ
,IWKHFRQGHQVDWHGRHVQRWGUDLQSURSHUO\LWZLOOEXLOGXSLQ
WKHZDWHUKHDWLQJXQLWDQGLQWHUIHUHZLWKLWVIXQFWLRQ
CONDENSATE PH LEVEL
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LQWKLVPDQXDOKDYHS+OHYHOVEHWZHHQDQG,QVWDOO
DFRPPHUFLDOO\DYDLODEOHQHXWUDOL]LQJNLWLIUHTXLUHGE\ORFDO
FRGHV
NOTE: /RZHU S+ OHYHOV DUH DFLGLF 'R QRW FRQQHFW D
PHWDOGUDLQOLQH VXFKDVFRSSHU WRWKHZDWHU KHDWHU IRU
this reason. See Water Heating Unit Condensate Drain
(page 37).
COMBUSTIBLE MATERIAL STORAGE
5HPRYH DQ\ FRPEXVWLEOH PDWHULDOV JDVROLQH RU DQ\
ÀDPPDEOHYDSRUVDQGOLTXLGV
FRQQHFWGLVFKDUJHSLSLQJGLUHFWO\WRWKHGUDLQXQOHVVD´
FPDLUJDSLVSURYLGHG7RSUHYHQWERGLO\LQMXU\KD]DUG
WROLIHRUSURSHUW\GDPDJHWKHUHOLHIYDOYHPXVWEHDOORZHG
WRGLVFKDUJHZDWHULQDGHTXDWHTXDQWLWLHVLIFLUFXPVWDQFHV
GHPDQG,IWKHGLVFKDUJHSLSHLVQRWFRQQHFWHGWRDGUDLQ
RURWKHUVXLWDEOHPHDQVWKHZDWHUÀRZPD\FDXVHSURSHUW\
GDPDJH
Water Damage Hazard
Temperature-Pressure Relief Valve discharge
pipe must terminate at adequate drain.
•
CAUTION
T&P VALVE DISCHARGE PIPE REQUIREMENTS
• 6KDOO QRW EH VPDOOHU LQ VL]H WKDQ WKH RXWOHW SLSH VL]H
RIWKHYDOYHRUKDYHDQ\UHGXFLQJFRXSOLQJVRURWKHU
UHVWULFWLRQV
• 6KDOOQRWEHSOXJJHGRUEORFNHG
• 6KDOOQRWEHH[SRVHGWRIUHH]LQJWHPSHUDWXUHV
• 6KDOOEHRIPDWHULDOOLVWHGIRUKRWZDWHUGLVWULEXWLRQ
• 6KDOOEHLQVWDOOHGVRDVWRDOORZFRPSOHWHGUDLQDJHRI
ERWK WKH 7HPSHUDWXUH3UHVVXUH 5HOLHI 9DOYH DQG WKH
GLVFKDUJHSLSH
• 0XVWWHUPLQDWHDPD[LPXPRIVL[LQFKHVDERYHDÀRRU
GUDLQRUH[WHUQDOWRWKHEXLOGLQJ,QFROGFOLPDWHVLWLV
UHFRPPHQGHGWKDWWKHGLVFKDUJHSLSHEHWHUPLQDWHGDW
DQDGHTXDWHGUDLQLQVLGHWKHEXLOGLQJ
• 6KDOOQRWKDYHDQ\YDOYHRURWKHUREVWUXFWLRQEHWZHHQ
WKHUHOLHIYDOYHDQGWKHGUDLQ
Burn hazard.
Hot water discharge.
Keep clear of Temperature-
Pressure Relief Valve
discharge outlet.
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WRHQVXUHWKDWQRRQHLVLQIURQWRIRUDURXQGWKHRXWOHW
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18
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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VENTILATION REQUIREMENTS
COMBUSTION AIR SUPPLY
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\RXUZDWHUKHDWHU
WARNING
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H[FHVVLYHDQGDEQRUPDODPRXQWVRIFDUERQ
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LGHSRLVRQLQJRUGHDWK
Breathing carbon monoxide can cause brain damage
or death. Always read and understand the instruction
manual.
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National Fuel Gas CodeANSI Z223.1/NFPA 54FXUUHQW
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Check for Chemicals
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Calculate Total BTU/h Rating of All Appliances
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19
Example:
Gas Water Heater 199,000
Furnace 75,000
Dryer 20,000
Total 294,000
Worksheet for Your Appliances:
Gas Water Heater
Total
Calculate the Air Volume of the Room
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Calculate Required Air Volume
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Required Air Volume (ft3) =Total Appliance Energy
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See Install with Outside Ventilation (page 19) if you
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See Install with Outside Ventilation (page 19).For
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Install with Outside Ventilation
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DLULIWKHPLQLPXPIUHHDUHDLVVL]HGDFFRUGLQJWRTable 6.
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Determine Type of Ventilation
7KHUHDUHVHYHUDOW\SHVRIYHQWLODWLRQWKDWFDQEHXVHG7KH
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2. 9HUWLFDOGXFWV
3. +RUL]RQWDOGXFWV
4. 6LQJOH RSHQLQJ QRW UHFRPPHQGHG PXVW EH DW OHDVW
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VPDOOHUWKDQIW3P3SHU%78KRUZKHQ
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Determine Minimum Free Area Required for Each Vent Opening
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20
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(100 in2· LQ2).
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area of the opening.
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Check that Air Source is Clean and Free of Chemicals
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Table 6 VKRZV WKH PLQLPXP IUHH DUHD RI SHUPDQHQW
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Table 6. Minimum Free Area by Ventilation Type
Opening Source Minimum Free Area
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Figure 13.)
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Figure 10.)
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Figure 11.)
7ZRSHUPDQHQW
openings
WRDQRWKHUURRP
1in2FP2SHU%WXKU (See
Figure 12.)
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Z223.1/NFPA 54,Q&DQDGDFRQWDFW\RXUORFDOFRGHHQIRUFHPHQWDJHQF\IRU
GLUHFWLRQ
Combustion Air Supply Options
Figure 8 through Figure 12 LOOXVWUDWHWKHUDQJHRIPHWKRGV
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ZDWHUKHDWHU
Gable vent
to outdoors
Install above
ŝŶƐƵůĂƟŽŶ
Outlet air to
ĂƫĐϭŝŶ2 ;ϲϱĐŵ2)
per 4,000 btu/h
/ŶůĞƚĂŝƌĨƌŽŵ
ƚŚĞĐƌĂǁůƐƉĂĐĞ
KƉĞŶĨŽƵŶĚĂƟŽŶǀĞŶƚ
ŽŶĮŶĞĚ
^ƉĂĐĞ
Alternate
Air Inlet
ϭŝŶ2 ;ϲϱĐŵ2)
per 4,000 btu/h
Figure 8. Air from Outdoors Openings
Two permanent
Openings
1 in2 (6.5 cm2)
per 4,000 btu/h
12” (305 mm)
maximum ŽŶĮŶĞĚ
Space
12” (305 mm)
maximum
Figure 9. Outdoor Air Through Two Openings