State Water Heaters SBL81120NE User manual

COMMERCIAL GAS WATER HEATERS
Instruction Manual
PRINTED 0814 327504-002
PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.
Thank you for buying this energy efcient water heater.
We appreciate your condence in our products.
MODELS
SBL 81120NE, 81154NE, 81180NE, 81199NE,
100199NE, 100250NE(A), 100275NE(A),
86310NE(A), 86366NE(A), 86390NE(A)
Ultra Low NOx SERIES 200
INSTALLATION - OPERATION - SERVICE
- MAINTENANCE - LIMITED WARRANTY
Complies with SCAQMD Low NOx Rule 1146.2
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.
•
•
•
•
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.
www.statewaterheaters.com
500 Tennessee Waltz Parkway
Ashland City, TN 37015
Technical Support 800-365-0024
Parts 800-821-2017

2
Outdoor Air Through Two Horizontal Ducts ........................ 16
Outdoor Air Through Two Vertical Ducts ............................ 17
Air From Other Indoor Spaces ........................................... 17
VENTING INSTALLATION ...................................................... 18
Venting ............................................................................... 18
Multiple Heater Manifold .................................................... 18
WATER HEATER INSTALLATION ........................................... 21
Water Line Connections ..................................................... 21
T&P Valve Discharge Pipe ................................................. 21
Installation Diagrams - Top Inlet/Outlet Usage ................... 22
Heater Wiring ..................................................................... 23
Gas Piping.......................................................................... 24
Gas Line Leak Testing ........................................................ 24
Purging ............................................................................... 24
Prior to Start Up ................................................................. 25
Initial Start Up..................................................................... 25
START UP ............................................................................... 25
Checking Venting ............................................................... 26
Checking the Input ............................................................. 26
Water Temperature Adjustment .......................................... 26
SEQUENCE OF OPERATION ................................................ 27
Lighting & Operating Label................................................. 27
Sequence of Operation Flow Chart .................................... 28
MAINTENANCE ..................................................................... 29
Venting System .................................................................. 29
Intake Air Screen ................................................................ 29
Temperature-Pressure Relief Valve Test ............................ 29
Anode Rod Inspection ........................................................ 29
Draining and Flushing ........................................................ 30
Periodic Removal of Lime Deposits from Tank Type Commercial
Water Heaters .................................................................... 30
Deliming Solvents .............................................................. 30
Tank Cleanout Procedure................................................... 31
Deliming Using Flo-Jug Method ......................................... 31
SERVICE ................................................................................. 32
Ignition Control System ...................................................... 32
System Diagnostics............................................................ 32
Electrical Servicing ............................................................. 32
FOR YOUR INFORMATION .................................................... 33
Start Up Conditions ............................................................ 33
Operational Conditions....................................................... 33
TROUBLESHOOTING ............................................................ 34
WATER PIPING DIAGRAMS ................................................... 35
TABLE OF CONTENTS
SAFE INSTALLATION, USE AND SERVICE............................. 3
APPROVALS ............................................................................. 3
GENERAL SAFETY INFORMATION ......................................... 4
Precautions .......................................................................... 5
Grounding Instructions ......................................................... 5
Hydrogen Gas Flammable ................................................... 5
INTRODUCTION ....................................................................... 6
Abbreviations Used .............................................................. 6
Qualications........................................................................ 6
Preparing for the Installation ................................................ 6
FEATURES AND COMPONENTS ............................................ 6
Controls ................................................................................ 6
The Hydrocannon (self-cleaning system)............................. 6
High Limit Switch.................................................................. 7
Electronic Ignition Control .................................................... 7
Blower/Burner Assembly ...................................................... 7
INSTALLATION CONSIDERATIONS ........................................ 8
Rough In Dimensions ........................................................... 8
Locating the Water Heater ................................................... 9
Clearances ........................................................................... 9
NSF Leg Kit ........................................................................ 10
Insulation Blanket ............................................................... 10
Hard Water ......................................................................... 10
Circulation Pumps .............................................................. 10
High Altitude Installations ................................................... 11
INSTALLATION REQUIREMENTS ......................................... 12
Gas Supply Systems .......................................................... 12
Gas Pressure Requirements .............................................. 12
Supply Gas Regulator ........................................................ 12
Power Supply ..................................................................... 12
Water Temperature Control and Mixing Valves .................. 12
Dishwashing Machines ...................................................... 13
Closed Water Systems ....................................................... 13
Thermal Expansion ............................................................ 13
Temperature-Pressure Relief Valve ................................... 13
Combustible Material Storage ............................................ 14
Contaminated Air................................................................ 14
Air Requirements ............................................................... 15
Unconned Space .............................................................. 15
Conned Space.................................................................. 15
Fresh Air Openings for Conned Spaces ........................... 16
Outdoor Air Through Two Openings ................................... 16
Outdoor Air Through One Opening .................................... 16

3
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.
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.
WARNING: 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.
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

4
GENERAL SAFETY INFORMATION
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 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.

5
PRECAUTIONS
DO NOT USE THIS WATER HEATER IF ANY PART HAS BEEN
EXPOSED TO FLOODING OR WATER DAMAGE. Immediately
call a qualied service technician to inspect the water heater and
to make a determination on what steps should be taken next.
If the unit is exposed to the following, do not operate heater
until all corrective steps have been made by a qualified
service technician.
1. External re.
2. Damage.
3. Firing without water.
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 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.
HYDROGEN GAS FLAMMABLE
Explosion Hazard
Flammable hydrogen gases
may be present.
Keep all ignition sources away
from faucet when turning on
hot water.
Hydrogen gas can be produced in a hot water system served
by this water heater that has not been used for a long period of
time (generally two weeks or more). Hydrogen gas is extremely
ammable. To reduce the risk of injury under these conditions,
it is recommended that a hot water faucet served by this water
heater 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 ow. THERE
SHOULD BE NO SMOKING OR OPEN FLAME NEAR THE
FAUCET AT THE TIME IT IS OPEN.
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 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
GENERAL SAFETY INFORMATION

6
FEATURES AND COMPONENTS
Thank You for purchasing this water heater. Properly installed
and maintained, it should give you years of trouble free service.
ABBREVIATIONS USED
Abbreviations found in this Instruction Manual include :
• ANSI - American National Standards Institute
• ASME - American Society of Mechanical Engineers
• AHRI - Air-Conditioning, Heating, and Refrigeration Institute
• NEC - National Electrical Code
• NFPA - National Fire Protection Association
• UL - Underwriters Laboratory
• CSA - Canadian Standards Association
QUALIFICATIONS
Qualied Installer or Service Agency
Installation and service of this water heater requires ability
equivalent to that of a Qualied Agency (as dened by
ANSI below) in the eld 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.
ANSI Z223.1 2012 Sec. 3.3.85: “Qualied Agency” - “Any
individual, rm, corporation or company that either in person or
through a representative is engaged in and is responsible for (1)
the installation, testing or replacement of gas piping or (2) 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.”
If you are not qualied (as dened by ANSI above) and licensed
or certied 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
the instructions given in this manual do not attempt to perform
any procedures outlined in this manual.
INTRODUCTION
PREPARING FOR THE INSTALLATION
1. Read the "General Safety Information" section, pages 4-5 of
this manual rst and then the entire manual carefully. If you
don’t follow the safety rules, the water heater will not operate
properly. It could cause DEATH, SERIOUS BODILY INJURY
AND/OR PROPERTY DAMAGE.
This manual contains instructions for the installation, operation,
and maintenance of the gas-red water heater. It also contains
warnings throughout the manual that you must read and be
aware of. All warnings and all instructions are essential to the
proper operation of the water heater and your safety. Since
we cannot put everything on the rst few pages, RE AD THE
ENTIRE MANUAL BE FORE ATTEMPTING TO INSTALL OR
OPERATE THE WATER HEATER.
2. The installation must conform with these instructions and the
local code authority having jurisdiction. In the absence of local
codes, the installation must comply with the current editions of
the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or CAN/
CSA-B149.1 the Natural Gas and Propane Installation Code.
All documents are available from the Canadian Standards
Association, 8501 East Pleasant Valley Road, Cleveland, OH
44131. NFPA documents are also available from the National Fire
Protection Association, 1 Batterymarch Park, Quincy, MA 02269.
3. If after reading this manual you have any questions or do not
understand any portion of the instructions, call the local gas utility
or the manufacturer whose name appears on the rating plate.
4. Carefully plan the place where you are going to put the
water heater. Correct combustion, vent action, and vent pipe
installation are very important in preventing death from possible
carbon monoxide poisoning and res.
Examine the location to ensure the water heater complies with
the “Locating the Water Heater” section in this manual.
5. For California installation this water heater must be braced,
anchored, or strapped to avoid falling or moving during an
earthquake. See instructions for correct installation procedures.
Instructions may be obtained from California Ofce of the State
Architect, 400 P Street, Sacramento, CA 95814.
CONTROLS
FIGURE 1.
THE HYDROCANNON (SELF-CLEANING SYSTEM)
These units include The Hydrocannon (Self-Cleaning System)
installed in the front water inlet, see Figure 2. The Hydrocannon
inlet tube can only be used in the front water inlet connection.
Do not install the Hydrocannon inlet tube in either the top or
back inlet water connection. The Hydrocannon must be oriented
correctly for proper function. There is a marked range on the
pipe nipple portion of the Hydrocannon, that must be aligned
with the top of the inlet spud. A label above the jacket hole has
an arrow that will point to the marked portion of the pipe nipple
if the orientation is correct. 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 Hydrocannon to reduce
the probability of misaligning the Hydrocannon accidentally while
tightening the connection to the inlet water supply line. Improper
orientation of the Hydrocannon can cause poor performance of
the heater and can significantly reduce outlet water temperatures
during heavy draws.

7
BLOWER/BURNER ASSEMBLY
The fan-assisted combustion system includes a spark-to-pilot
igniter, 100% premix stainless steel burners, and prejets for input
rate and precision air/gas ratio control.
2-BURNER / BLOWER ASSEMBLY
(for Input of 199KBtu/H or Less)
3-BURNER / BLOWER ASSEMBLY
(for Input of 250KBtu/H or Higher)
FIGURE 5.
The intake air screen is attached to the inlet of the combustion
blower. Inspect the intake air screen every six months. The intake
air screen should be cleaned of any buildup of debris or foreign
material.
Note: The Hydrocannon may have 1, 3 or 7 cross tubes.
FIGURE 2.
HIGH LIMIT SWITCH
The digital thermostat (Figure 3) contains the high limit (energy
cutout) switch. The high limit switch interrupts burner gas ow should
the water temperature reach 203°F (95°C).
In the event of high limit switch operation, the water heater cannot be
restarted unless the water temperature is reduced to approximately
120°F (49°C). The high limit reset button on the front of the control
then needs to be depressed.
Continued manual resetting of high limit control, preceded by higher
than usual water temperature is evidence of high limit switch operation.
Contact your dealer or service agent if continued high limit switch
operation occurs.
RESET
BUTT
ON
LED
LIGHTS
FUSE
140
130
DIGITAL THERMOSTAT
FIGURE 3.
ELECTRONIC IGNITION CONTROL
Each heater is equipped with an ignition control. The solid state
ignition control (Figure 4), ignites the burner by utilizing an
intermittent spark-to-pilot igniter. Spark and pilot gas ON until
lightoff or trial for ignition ends. If pilot fails to light, pilot gas and
spark OFF (100% shutoff). After 5 minutes delay, a new trial for
ignition is initiated. This sequence continues until lightoff or "Call
for Heat" is removed.
IGNITION CONTROL
FIGURE 4.

8
ROUGH IN DIMENSIONS
FIGURE 6.
TABLE 1. ROUGH-IN-DIMENSIONS
MODEL DIM. SBL81 120, 154, 180, 198NE SBL100 199, 250(A), 275NE(A) SBL86 310(A), 366(A), 390NE(A)
inches cm inches cm inches cm
A633/4 161.93 713/4 182.25 713/4 182.25
B37 93.98 37 93.98 37 93.98
C65 165.1 73 18542 73 18542
D523/4 133.99 603/4 154.31 603/4 154.31
E203/4 52.71 201/2 52.07 201/2 52.07
F21 53.34 21 53.34 21 53.34
G3/4 NPT 3/4 NPT 3/4 NPT
H53 134.62 61 154.94 61 154.94
I615.24 615.24 615.24
J273/4 70.49 273/4 70.49 273/4 70.49
K1 1/2 NPT 1 1/2 NPT 1 1/2 NPT
L1 1/2 NPT 1 1/2 NPT 1 1/2 NPT
M - - 8 20.3 820.3
Approx. Shipping Weight STD 650 295 750 341 810 367
Approx. Shipping Weight ASME N/A N/A 800 363 860 390
TABLE 2. RECOVERY CAPACITIES, BASED ON 80% THERMAL EFFICIENCY
Model
Input
Kbtuh
Input
Kw
U.S.
Gal. Liters
Eff. %
U.S. Gallons/hr and Liters/hr at Temperature Rise Indicated
°F 36 40 50 54 60 70 72 80 90 100 108 110 120 126 130 140
°C 20 22 28 30 33 39 40 44 50 56 60 61 67 70 72 78
SBL81120NE 120 81 80 GPH 320 288 230 213 192 165 160 144 128 115 107 105 96 91 89 82
35 307 LPH
1212 1091 872 808 727 623 606 545 485 436 404 397 364 346 336 312
SBL81154NE 154 81 80 GPH 411 370 296 274 246 211 205 185 164 148 137 134 123 117 114 106
45 307 LPH
1555 1399 1120 1037 933 800 777 700 622 560 518 509 466 444 431 400
SBL81180NE 180 81 80 GPH 480 432 346 320 288 247 240 216 192 173 160 157 144 137 133 123
53 307 LPH
1818 1636 1309 1212 1091 935 909 818 727 654 606 595 545 519 503 467
SBL81199NE 199 81 80 GPH 531 478 382 354 319 273 265 239 212 191 177 174 159 152 147 137
58 307 LPH
2009 1808 1447 1340 1206 1033 1005 904 804 723 670 658 603 574 556 517
SBL100199NE 199 100 80 GPH 531 478 382 354 319 273 265 239 212 191 177 174 159 152 147 137
58 378 LPH
2009 1808 1447 1340 1206 1033 1005 904 804 723 670 658 603 574 556 517
SBL100250NE(A) 250 100 80 GPH 667 600 480 445 400 343 333 300 267 240 222 218 200 191 185 171
73 378 LPH
2524 2272 1818 1683 1515 1298 1262 1136 1010 909 841 826 757 721 699 649
SBL100275NE(A) 275 100 80 GPH 734 660 528 489 440 377 367 330 293 264 245 240 220 210 203 189
81 378 LPH
2777 2499 1999 1851 1666 1428 1388 1250 1111 1000 926 909 833 793 769 714
SBL86310NE(A) 310 86 80 GPH 827 744 595 551 496 425 413 372 331 298 276 271 248 236 229 213
91 325 LPH
3130 2817 2254 2087 1878 1610 1565 1409 1252 1127 1043 1024 939 894 867 805
SBL86366NE(A) 366 86 80 GPH 976 879 703 651 586 502 488 439 391 352 325 320 293 279 270 251
107 325 LPH
3696 3326 2661 2464 2217 1901 1848 1663 1478 1330 1232 1209 1109 1056 1023 950
SBL86390NE(A) 390 86 80 GPH
1040 936 749 694 624 535 520 468 416 375 347 340 312 297 288 268
114 325 LPH
3938 3544 2835 2625 2363 2025 1969 1772 1575 1418 1313 1289 1181 1125 1091 1013
TABLE 3. GAS AND ELECTRICAL CHARACTERISTICS
Model Gas Type Gas Supply Pressure Volts / Hz Amperes
Minimum Maximum
120NE THRU 275NE(A) Natural 3.5" W.C. (0.87 kPa) 14" W.C. (3.48 kPa) 120/60 <5
310NE(A) THRU 390NE(A) Natural 4.5" WC (1.12 KPA) 14" W.C. (3.48 kPa) 120/60 <5
INSTALLATION CONSIDERATIONS

9
heater is installed in a carpeted alcove, the entire oor shall
be covered by the panel.
The heater shall be located or protected so it is not subject to
physical damage by a moving vehicle.
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.
The heater must not be located in an area where it will be
subject to freezing.
Locate it near a floor drain. The heater should be located in
an area where leakage from heater or connections will not
result in damage to adjacent area or to the lower floors of
the structure.
When such locations cannot be avoided, a suitable drain pan
should be installed under heater. Such pans should be fabricated
with sides at least 2” deep, with length and width at least 2” greater
than diameter of heater and must be piped to an adequate drain.
Pan must not restrict combustion air ow.
CLEARANCES
This water heater is approved for installation on combustible
ooring in an alcove with minimum clearance from combustion
construction as indicated in Figure 7 and Table 4.
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 6” (15.2 cm) clearance unless an approved reducing
thimble is used.
When the water heater is installed directly on carpeting, the water
heater shall be installed on a metal or wood panel extending
beyond the full width and depth of the water heater by at least
3 in (76.2 mm) in any direction or, if the water heater is installed
in an alcove or closet, the entire oor shall be covered by the
panel. The panel must be strong enough to carry the weight of
the heater when full of water.
A service clearance of at least 24” (61 cm) should be maintained
from serviceable parts.
TABLE 4. MINIMUM CLEARANCES TO COMBUSTIBLE OR
NON-COMBUSTIBLE CONSTRUCTION
Model "A" Right Side "B" Left Side "C" Back "D" Ceiling
All
0" 0" 0" 12"
0 cm 0 cm 0 cm 30.5 cm
LOCATING THE WATER HEATER
Property Damage Hazard
All water heaters eventually leak.
•
Do not install without adequate drainage.
•
CAUTION
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.
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.
There is a risk in using fuel burning appliances such as gas
water heaters in rooms, garages or other areas where gasoline,
other ammable liquids or engine driven equipment or vehicles
are stored, operated or repaired. Flammable vapors are heavy
and travel along the oor and may be ignited by the heater's
igniter or main burner ames causing re or explosion. Some
local codes permit operation of gas appliances in such areas if
they are installed 18" or more above the oor. This may reduce
the risk if location in such an area cannot be avoided.
Do not install this water heater directly on a carpeted oor.
A re 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

10
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
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 identication of
components mentioned below. Failure to follow these instructions
can restrict the air ow required for proper combustion, potentially
resulting in re, asphyxiation, serious personal injury or death.
• DO NOT apply insulation to the front of the combustion
chamber ange plate to insure that the spark igniter, ame
sensor, and sightglass remain uncovered.
• DO NOT cover the gas control valve or the Temperature-
Pressure Relief Valve.
• DO NOT apply insulation within 5” (13 cm) of the blower, to
insure the safe operation of the blower assembly.
• DO NOT apply insulation on the control box that encloses
the thermostat, ignition control, and variable frequency drive.
• 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 ow.
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.
See the Maintenance Section in this manual for sediment and
lime scale removal procedures.
CIRCULATION PUMPS
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.
See the Circulation Pump Wiring Diagrams (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.
Stainless steel circulating pumps are recommended for use with
commercial water heaters.
FIGURE 7.
NSF LEG KIT
FIGURE 8.
The NSF Leg Kit (part number 9008883005) is needed only for
applications that must conform to NSF/ANSI Standard 5. The
installed height of the water heater will increase by 4" (10.2 cm)
when the leg kit is installed. Follow these steps to install the Leg Kit.
Use caution to prevent damage to the unit when installing the Leg Kit
1. Lift, tilt or lay the unit on its side to access the bottom of the legs.
2. Position the extension under leg aligning the holes in the leg
extension with the holes in the leg. Assemble the bolt, bevel
washers, at washers, and nut through the aligned holes in
the leg and leg extension as shown in Figure 8.
3. Once in place, tighten the nut and bolt assembly. Torque to 70
ft.lbs (9.67 kgf-m).
4. Insure that all four nut and bolt assemblies are torqued to the
specied value before placing the unit on the oor.