A.O. Smith BTR(C)120 THRU 500A, Installation Operation & Maintenance

Page 1: ...A 2576 0903 SUPERSEDES PART NO 194421 000 A DIVISION OF A O SMITH CORPORATION McBEE SOUTH CAROLINA USA STRATFORD ONTARIO CANADA www aosmithwaterheaters com CAUTION TEXT PRINTED OR OUTLINED IN RED CON...

Page 2: ...0 345 Kg 396 Kg BTR 500 500 000 BTR Hr 85 Gal 82 25 4 50 73 50 65 25 25 50 21 1 65 75 8 27 75 1 50 1 50 1 50 1 50 1 50 1 50 745Lbs 857Lbs 147kW Hr 322L 209cm 12cm 187cm 166cm 65cm 53cm 1 167cm 20cm 70...

Page 3: ...212 970 808 693 606 539 485 441 404 373 346 500 147 Kw Hr 322 L 6118 4588 3671 3059 2622 2294 2039 1835 1668 1529 1412 1311 30 40 50 60 70 80 90 100 110 120 130 140 TABLE1D HEATERPERFORMANCEDATABTR C...

Page 4: ...er Troubleshooting Guide 33 Operational Checklist 34 Limited Warranty 35 Page Page FOREWORD These designs comply with ANSI Z21 10 3 CSA 4 3 M98 as an automatic circulating or automatic storage tank ty...

Page 5: ...xplosive and heavier than air It collects first in the low areas making its odor difficult to detect at nose level If LP gas is present or even suspected do not attempt to find the cause yourself Go t...

Page 6: ...ion for operation at altitudes other than that specified on the heater rating plate is not permitted The input reduction is primarily achieved by reducing the size of the main burner orifices To do th...

Page 7: ...quipped with a Service Switch as shown in figure 5 FIGURE5 The Service Switch has 2 positions AUTOMATIC OPERATION and HOLD OPEN DAMPER For normal operation the switch should be in the AUTOMATIC OPERAT...

Page 8: ...ZED CONTAINERS OR ANY OTHER POTENTIAL FIRE HAZARDOUS ARTICLES MUST NEVER BE PLACED ON ORADJACENTTOTHE HEATER OPEN CONTAINERS OR FLAMMABLE MATERIAL SHOULD NOT BE STORED OR USED IN THE SAME ROOM WITH TH...

Page 9: ...R FLAMMABLES VAPORS AND LIQUIDS DO NOT OBSTRUCT THE FLOW OF COMBUSTION OR VENTILATINGAIR WARNING FOR SAFE OPERATION PROVIDE ADEQUATE AIR FOR COMBUSTIONAND VENTILATION AN INSUFFICIENT SUPPLY OF AIR WIL...

Page 10: ...d from freezing downdrafts Remove all soot or other obstructions from the chimney that will retard a free draft Type B venting is recommended with these heaters See table 3 TECHNICAL DATA VENTING This...

Page 11: ...R C 180 197 198 199 200 Input 180 000 190 000 199 000 Btuh Total Vent Height Feet Draft Hood 6 6 8 10 15 20 30 50 100 Input Btuh Rise Vent Connector Diameter in inches 180 000 1 Ft 8 8 8 8 8 7 7 7 190...

Page 12: ...10 10 10 8 8 8 Number of Combined Input Heaters in Thousands of Btuh Manifold Common Vent Diameter 2 610 14 14 12 12 12 10 10 10 3 915 16 16 16 14 14 12 12 12 4 1220 18 18 16 16 16 14 14 12 MODEL BTR...

Page 13: ...storage tank which may be used in conjunction with this appliance shall also be installed with a properly sized rated and approved combination temperature ANSI and pressure ASME relief valve s WARNIN...

Page 14: ...ICE BEFORE ATTACHING THE GAS LINE BE SURE THATALL GAS PIPE IS CLEAN ON THE INSIDE TO TRAP ANY DIRT OR FOREIGN MATERIAL IN THE GAS SUPPLY LINE A DIRT LEG SOMETIMES CALLED SEDIMENT TRAP OR DRIP LEG MUST...

Page 15: ...NG EXCEEDING 1 2 PSIG 3 5 kPa GAS SUPPLY LINE MUST BE CAPPED WHEN DISCONNECTED FROM THE HEATER FOR TEST PRESSURES OF 1 2 PSIG 3 5 kPa OR LESS THE APPLIANCE NEED NOT BE DISCONNECTED BUTMUSTBE ISOLATED...

Page 16: ...OULD NOT EXCEED SAFE USE TEMPERATUREAT FIXTURES SEE WATERTEMPERATURE CONTROL WARNING ON PAGE 27 IF HIGHER PREHEAT TEMPERATURES ARE NECESSARYTO OBTAINADEQUATE BOOSTER OUTPUT ADDANANTI SCALD VALVE FOR H...

Page 17: ...TOGGLESWITCHMUSTBECLOSED ON DURING THERINSEOPERATIONANDOPEN OFF WHENDISHWASHER IS NOTOPERATING OR WHEN ON LONG STANDBY NOTE 2 INSTALLLINETEMPERATURECONTROLINANUNINSULATED TEEBEYONDTHEDISHWASHINGMACHIN...

Page 18: ...ions shown in the installation diagrams on the following pages are typical TWO TEMPERATURE TWO HEATERS ONE PRE HEATER ONE BOOSTER HEATER WITH OR WITHOUT BUILDING RECIRCULATION The discharge opening of...

Page 19: ...OTE 3 ADJUST PLUG COCK SO THE SANITIZING LOOP FLOW RATE DOES NOT CAUSE UNNECESSARY TURBULENCE IN THE TANK PIPE RELIEF VALVE TO OPEN DRAIN INSTALL IN ACCORDANCE WITH LOCAL CODES CIRCULATING RETURN LINE...

Page 20: ...TERS WITH MIXING VALVE TWO PRE HEATERS WITH BOOSTER HEATER DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 27 IF HIGHER PREH...

Page 21: ...TER OUTPUT ADD AN ANTI SCALD VALVE FOR HOT WATER SUPPLIEDTO FIXTURES PIPE RELIEF VALVE TO OPEN DRAIN WHEN USING AN A O SMITH T 140 200 350 OR 400 STORAGE TANK USE LOWER 3 4 OPENING FOR TANK TEMPERATUR...

Page 22: ...S BTRCMODELS 120 69 75 177cm 69 75 177cm 154 73 00 185cm 73 00 185cm 180 67 50 171cm 70 50 179cm 197 75 00 192cm 81 50 207cm 198 75 00 192cm N A 199 67 50 171cm 70 50 179cm 200 72 00 183cm 72 00 183cm...

Page 23: ...ete instructions MULTIPLE UNIT INSTALLATIONS For multiple unit installations contact A O Smith Water Products Company Technical Support Center at 1 800 527 1953 In Canada contact A O Smith Enterprises...

Page 24: ...TOAVOID RISK OF FIRE OR EXPLOSION PURGE DISCHARGE MUST NOT ENTER CONFINEDAREAS OR SPACES WHERE IGNITION CAN OCCUR THE AREA MUST BE WELL VENTILATED AND ALL SOURCES OF IGNITION MUSTBE INACTIVATED OR RE...

Page 25: ...L SYSTEM AND ANY GAS CONTROL WHICH HAS BEEN UNDER WATER E DO NOT OPERATE APPLIANCE UNLESS UNIT IS FILLED WITH WATERAND INLET LINESAFTER FULLY OPEN WARNING IF YOU DO NOT FOLLOW THESE INSTRUCTIONS EXACT...

Page 26: ...NTROL SYSTEM AND ANY GAS CONTROL WHICH HAS BEEN UNDER WATER E DO NOT OPERATE APPLIANCE UNLESS UNIT IS FILLED WITH WATERAND INLET LINESAFTER FULLY OPEN WARNING IFYOUDONOTFOLLOWTHESEINSTRUCTIONSEXACTLY...

Page 27: ...water temperature is controlled by a thermostat Fig 3 which has two sensing elements One sensor is located near the top of the tank and the other is near the center The thermostat is set in the lowest...

Page 28: ...CHECK THE PILOT At least once a year check the pilot burner fig 16 and the main burner fig 17 for proper operation Refer to the following pilot and main burner sections PILOT BURNER For access to pilo...

Page 29: ...ge or a manometer to the gauge port and refer to Table 5 for correct manifold pressure 2 Use this formula to clock the meter Be sure that other gas consuming appliances are not operating during this i...

Page 30: ...the heater and replacement of the factory installed magnesium anodes with aluminum anodes may correct the condition Occasionally water softener companies recommend removal of heater anodes for odor re...

Page 31: ...ad screws securing tank cleanout plate and remove plate 4 Remove lime scale or sediment using care not to damage the glass lining 5 Inspect cleanout plate gasket if new gasket is required replace with...

Page 32: ...replaced TROUBLESHOOTING IGNITION MODULE SYSTEM Before calling your service agent the following checklist should be examined to eliminate obvious problems from those requiring replacement or servicing...

Page 33: ...Blown fuse or circuit breaker 5 Disconnect switch off 6 Harness not plugged into appliance receptacle A FLUE DAMPER OPEN OR OPENING Unit is calling for heat and damper disc should be in vertical posi...

Page 34: ...slower Call serviceman Check gas input If incorrect adjust gas pressure or replace main burner orifice Draft hood not installed or Call serviceman Install draft hood or baffles as one or more flue ba...

Page 35: ...wner is responsible for all other costs Such costs may include but are not limited to a Labor charges for service removal repair or reinstallation of the water heater or any component part b Shipping...

Page 36: ...36 5621 W 115TH STREET ALSIP IL 60803 Phone 800 433 2545 Fax 800 433 2515 www aosmithwaterheaters com REPLACEMENTPARTS...