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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 from freezing downdrafts during shutdown periods.

GROUNDING INSTRUCTIONS

This water heater must be grounded in accordance with the National 

Electrical Code and/or local codes. These must be followed in all cases.

This water heater must be connected to a grounded metal, permanent 

wiring system; or an equipment grounding conductor must be run with 

the circuit conductors and connected to the equipment grounding terminal 

or lead on the water heater, see Figure 5.

TABLE OF CONTENTS

                                                                                                              

   Page

ROUGH-IN DIMENSIONS .............................................................  2

FOREWORD .................................................................................  2

GENERAL SAFETY INFORMATION .............................................  2-4 

Precautions....................................................................................  3

  Grounding Instructions...............................................................  3

  Chemical Vapor Corrosion .........................................................  3

  Extended Non-use Periods ........................................................  3

  Insulation Blankets.....................................................................  4

  High Altitude Installations...........................................................  4

  Circulating Pump .......................................................................  4

INSTALLATION INSTRUCTIONS .................................................  4-9 

Required Ability..............................................................................  4

  Locating The Heater ..................................................................  4

 Clearances.................................................................................  5

  Hard Water ................................................................................  5

  Air Requirements .......................................................................  5 

 Venting .......................................................................................  6

  Thermometers (Not Supplied) ...................................................  7

  Combination Water (Potable) Heating and Space Heating .......  7

  Relief Valve ................................................................................  7

  Gas Piping .................................................................................  7

  Heater Wiring .............................................................................  8

  Wiring Diagram ..........................................................................  8 

 Purging ......................................................................................  9

  Gas Pressure Regulation..........................................................  9

OPERATION .................................................................................  9

  To Operate The Heater .............................................................  9

  Lighting Instructions ..................................................................  10

  Temperature Regulation ...........................................................  11

  Checking Venting ......................................................................  11

  High Temperature Limit Switch .................................................  11

SERVICE INFORMATION ............................................................  12-13

  Main Burner and Igniter ............................................................  12

  Checking Gas Input ..................................................................  12

  Vent System..............................................................................  12

  Blower Maintenance .................................................................  13

  Relief Valve ...............................................................................  13

  Hot Water Odor .........................................................................  13

  Winter Protection ......................................................................  13

  Replacement Parts ...................................................................  13

PREVENTIVE MAINTENANCE ....................................................  13-14

  Procedure for Periodic Removal Of Lime Deposits ..................  13

  Deliming Solvents .....................................................................  13

  Tank Cleanout Procedure .........................................................  14

CHECKLIST .................................................................................  15-16

 Condensation............................................................................  15

 Anode .......................................................................................  15

  Service & Repair .......................................................................  16

TROUBLESHOOTING .................................................................  17-20

NOTES .........................................................................................  21-22

LIMITED WARRANTY ...................................................................  23

CHEMICAL VAPOR CORROSION

 WARNING

CORROSION OF THE FLUEWAYS AND VENT SYSTEM MAY OCCUR IF 

AIR FOR COMBUSTION CONTAINS CERTAIN CHEMICAL VAPORS.  SUCH 

CORROSION MAY RESULT IN FAILURE AND RISK OF ASPHYXIATION.

Spray can propellants, cleaning solvents, refrigerator and air conditioning 

refrigerants, swimming pool chemicals, calcium and sodium chloride (water 

softener salt), waxes, and process chemicals are typical compounds which 

are potentially corrosive.  Do not store products of this sort near the heater.  

Also, air which is brought in contact with the heater should not contain 

any of these chemicals.  If necessary, uncontaminated air should be 

obtained from remote or outside sources.  The limited warranty is voided 

when failure of water heater is due to a corrosive atmosphere.  (Refer to 

the limited warranty for complete terms and conditions.)

EXTENDED NON-USE PERIODS

 WARNING

HYDROGEN GAS CAN BE PRODUCED IN A HOT WATER SYSTEM 

SERVED BY THIS HEATER THAT HAS NOT BEEN USED FOR A LONG 

PERIOD OF TIME (GENERALLY TWO WEEKS OR MORE). HYDROGEN 

GAS IS EXTREMELY FLAMMABLE.

 To reduce the risk of injury under 

these conditions, it is recommended that the hot water faucet be opened 

for several minutes at the kitchen sink before using any electrical appliance 

connected to the hot water system. If hydrogen is present, there will 

probably be an unusual sound such as air escaping through the pipe as 

the water begins to flow. 

THERE SHOULD BE NO SMOKING OR OPEN 

FLAME NEAR THE FAUCET AT THE TIME IT IS OPEN.

 Page

Summary of Contents for BBCN375T754NV 100 Series

Page 1: ...AL 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 T...

Page 2: ...Canada Current edition of the Installation Code CAN CSA B149 1 and the Canadian Electrical Code CSA C22 1 These are available from Canadian Standards Association 8501 East Pleasant Valley Road Clevel...

Page 3: ...r and Igniter 12 Checking Gas Input 12 Vent System 12 Blower Maintenance 13 Relief Valve 13 Hot Water Odor 13 Winter Protection 13 Replacement Parts 13 PREVENTIVE MAINTENANCE 13 14 Procedure for Perio...

Page 4: ...gas in excess of the safe limits This could result in serious injury or death Contact your local gas supplier for any specific changes that may be required in your area Upon completion of derating of...

Page 5: ...THROUGH THE CHIMNEY OR VENT PIPE The venting of the water heater should be inspected by a qualified service technician at the time of installation and periodically thereafter to ensure a down draft c...

Page 6: ...t of the vent system are exposed to ambient temperatures below 35 degrees F 2 degrees C it must be insulated to prevent condensation Do not connect the heater to a common vent or chimney with solid fu...

Page 7: ...E LOCATION TO AVOID SCALDING OR WATER DAMAGE THIS LINE MUST NOT BE REDUCED FROM THE SIZE OF THE VALVE OUTLET AND MUST NOT CONTAIN VALVES RESTRICTIONS NOR SHOULD IT BE LOCATED IN FREEZING AREAS DO NOT...

Page 8: ...having jurisdiction AN ELECTRICAL GROUND IS REQUIRED TO REDUCE RISK OF ELECTRICAL SHOCK OR POSSIBLE ELECTROCUTION If any of the original wire as supplied with the appliance must be replaced use only t...

Page 9: ...matic gas valve while heater is operating TABLE 5 Type of Gas Input Manifold Pressure Natural 75 100 Btu hr 22 KW hr 4 0 in W C 1 12 kPa OPERATION It is recommended that a qualified person perform the...

Page 10: ...as been under water OPERATING INSTRUCTIONS A Set thermostat to the lowest setting B Turn off all the electric power to the appliance if service is to be performed TO TURN OFF GAS TO APPLIANCE BEFORE O...

Page 11: ...akage corrosion and other deficiencies which could cause an unsafe condition 3 So far as is practical close all building doors and windows and all doors between the space in which the water heater s c...

Page 12: ...rn doors windows exhaust fans fireplace dampers and any other gas burning appliance to their previous conditions of use 7 If improper venting is observed during any of the above tests the venting syst...

Page 13: ...anode as necessary to maintain corrosion protection For further information contact your dealer WINTER PROTECTION In regions where freezing weather is encountered all water must be drained from unit...

Page 14: ...the Flo Jug kit This screw is to be installed in the vent hole when Flo Jug is not in use Remove drain valve from heater and insert a 3 4 x 4 nipple Connect and clamp 1 I D x 3 hose to Flo Jug and hea...

Page 15: ...idence of poor vent action Possible causes are too long a vent pipe or improper chimney operation 3 If the leakage is from the temperature and pressure relief valve or its discharge pipe it may repres...

Page 16: ...information and tables may serve to answer your question about a problem that you are having without having to call a service agent For your safety water heater service should be performed only by a q...

Page 17: ...a qualified person for service 3 Thermostat problems A Thermostat set too low Set temperature control higher B Thermostat or ECO defective Replace gas control valve thermostat C High limit control ci...

Page 18: ...control does not energize the blower replace the Intelli Vent control If the blower fails to Blower may run continuously in start when energized replace the blower assembly this condition 2 Ensure the...

Page 19: ...ff for 10 20 seconds then on again to clear this error code 4 Ensure the flame sensor is clean use ultra fine steel wool or Scotch Brite pad to clean flame sensor 5 Ensure the hot surface ignitor is p...

Page 20: ...in tolerance 1 Ensure air pressure switch hose is not kinked or clogged ensure the blower housing is clear of any condensation 2 Check vent temperature limit switch if it is determined that the vent t...

Page 21: ...21 NOTES...

Page 22: ...22 NOTES...

Page 23: ...hod of controlling thermal expansion is also installed at the heater s and operational at all times The relief valve installed on the heater is not an acceptable method 4 SERVICE AND REPAIR EXPENSES U...

Page 24: ...nson City TN 37605 Phone 800 456 9805 Fax 800 999 5210 www americanwaterheater com Copyright 2012 American Water Heater Company All rights reserved www americanwaterheater com American Water Heater Jo...

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