American Water Heater 74 Gallon 80 Thermal Efficiency UltraLow NOx Heavy Duty Commercial Gas Water Heater User Manual

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PRINTED IN U.S.A. 1212 PART NO. 325370-000
MODELS BBCN375T754NV 
PLACE THESE INSTRUCTIONS ADJACENT TO HEATER
AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.
COMMERCIAL ULTRA LOW NOx GAS WATER HEATER
Glass-Lined Tank-type Water Heater 
•  INSTALLATION   •   OPERATION   •   SERVICE   •   MAINTENANCE  •  LIMITED WARRANTY
  CAUTION
TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION 
RELATIVE TO YOUR SAFETY.  PLEASE READ THOROUGHLY 
BEFORE  INSTALLING AND  USING THIS APPLIANCE.
Series 100
www...

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FOREWORD
The design of model BBCN375T754NV complies with the current edition 
of ANSI Z21.10.3/CSA 4.3 as automatic storage or automatic circulating 
tank type water heaters.
Installation diagrams are found in this manual.  These diagrams will serve 
to provide the installer with a reference for the materials and method of 
piping necessary.  It is highly essential that all water and gas piping be 
installed as shown on the diagrams.
In addition to these instructions, the equipment shall be installed...

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GENERAL SAFETY INFORMATION
PRECAUTIONS
DO NOT USE THIS WATER HEATER 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.
IF THE UNIT IS EXPOSED TO THE FOLLOWING, DO NOT OPERATE 
HEATER UNTIL ALL CORRECTIVE STEPS HAVE BEEN MADE BY A 
QUALIFIED SERVICEMAN.
1.  EXTERNAL FIRE.
2. DAMAGE.
3.  FIRING WITHOUT WATER.
4. SOOTING.
Heater must be protected...

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INSULATION BLANKETS
Insulation blankets available to the general public for external use 
on gas water heaters are not required for use on your water heater. 
The purpose of an insulation blanket is to reduce the standby heat 
loss encountered with storage tank water heaters. Your  water 
heater meets or exceeds the current edition of ASHR AE/IES 90.1 
standards with respect to insulation and standby loss requirement 
making an insulation blanket unnecessary.
  WARNING
Should you choose to apply an...

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installed in a carpeted alcove or closet, the entire floor shall be covered 
by the panel.  Also, see the drain requirements.
THIS HEATER SHALL BE LOCATED OR PROTECTED SO IT IS 
NOT SUBJECT TO PHYSICAL DAMAGE BY A MOVING VEHICLE.
  WARNING
FLAMMABLE ITEMS
, PRESSURIZED CONTAINERS OR ANY 
OTHER POTENTIAL FIRE HA ZARDOUS ARTICLES MUST 
NEVER BE PLACED ON OR ADJACENT TO THE HEATER.  OPEN 
CONTAINERS OF FLAMMABLE MATERIAL SHOULD NOT BE 
STORED OR USED IN THE SAME ROOM WITH THE HEATER.
When installing the...

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CAUTION: IF BUILDING COLD WATER SUPPLY HAS A BACK-FLOW
PREVENTER, CHECK VALVE OR WATER METER WITH CHECK 
VALVE, PROVISIONS FOR THERMAL EXPANSION OF WATER IN 
THE HOT WATER SYSTEM MUST BE PROVIDED.
FIGURE 3.
CIRCULATING RETURN LINE CONNECTIONS
TEMPERED WATER LOOP, IF USED, CONNECT TO POINT "A".  
STORED TEMPERATURE WATER LOOP, IF USED, CONNECT TO 
COLD WATER INLETWARNING
TEMPERATURE SETTING SHOULD NOT EXCEED SAFE 
USE TEMPERATURE AT FIXTURES.  SEE TEMPERATURE 
REGULATION ON PAGE 11.  IF HIGHER...

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THERMOMETERS (Not Supplied)
Thermometers should be obtained and field installed as shown in 
Figure 3.
Thermometers are installed in the system as a means of detecting the 
temperature of the outlet water supply.
COMBINATION 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.
2.  Toxic chemicals, such as those used for boiler treatment, shall 
NEVER be introduced into this system.
3. This...

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FIGURE 4. WIRING DIAGRAM AND SCHEMATIC
HEATER WIRING
All electrical work must be installed in the United States in accordance with the current edition of the National Electrical Code
 ANSI/NFPA  No. 
70, in Canada, with the current edition of Canadian Electrical Code CSA C22.1, 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...

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TABLE 4. GAS SUPPLY LINE SIZES (IN INCHES)*
MAXIMUM CAPACITY OF PIPE IN CUBIC FEET PER HOUR
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.
FIGURE 5. GAS PIPING AND  SEDIMENT TRAP INSTALLATION 
DISCONNECT THE HEATER AND ITS MANUAL GAS SHUTOFF VALVE  
FROM THE GAS SUPPLY PIPING SYSTEM DURING ANY SUPPLY...

105. 
Wait five (5) minutes                   to clear out any gas.  
If you then smell gas,           STOP!  Follow "B" in 
the safety information                above on this label.
  If you don't smell gas, go to next step.
6.  Turn on all electrical power to the appliance.
7.   Set thermostat to desired setting by first pressing the 
COOLER 
  and HOTTER   buttons together and 
holding for 1 second. Then press the HOTTER 
  
button.
8.   If the appliance will not operate, follow the...