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A.O. Smith BT- 80 manual

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Table of contents for the manual

  • Page 1

    1 PRINTED 0107 197569-000 MODELS BT - 80 AND 100 300/301 SERIES PLACE THESE INSTRUCTIONS ADJACENT TO HEA TER AND NOTIFY OWNER T O KEEP FOR FUTURE REFERENCE. COMMERCIAL GAS W A TER HEA TER Glass-Lined T ank-T ype W ater Heater • INST ALLA TION • OPERA TION • SER VICE • MAINTENANCE • LIMITED W ARRANTY Thank you for buying this energy effici[...]

  • Page 2

    2 FOREWORD The design of models BT -80 and 100 comply 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 hi[...]

  • Page 3

    3 GENERAL SAFETY INFORMA TION PRECAUTIONS DO NOT USE THIS APPLIANCE IF ANY P ART HAS BEEN UNDER W ATER. 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 OPERA TE HEA TER UNTIL ALL COR[...]

  • Page 4

    4 IF YOU EXPERIENCE AN OUT -OF-GAS SITUA TION, DO NOT TRY TO RELIGHT APPLIANCES YOURSELF , ask your LP delivery person to relight pilots for you. Only trained LP professionals should conduct the required safety checks in accordance with industry standards. EXTENDED NON-USE PERIODS W ARNING HYDROGEN GAS CAN BE PRODUCED IN A HOT WA TER SYSTEM SERVED [...]

  • Page 5

    5 Drain pans suitable for these heaters are available from your distributor or A. O. Smith W ater Products Company , 500 T ennessee W altz Parkway , Ashland City , TN 37015. W ater heater life depends upon water quality , water pressure and the environment in which the water heater is inst alled. W ater heaters are sometimes installed in locations [...]

  • Page 6

    6 insulation, caulking, vapor barrier , etc.), air for combustion, ventilation and draft hood dilution must be obtained from out doors. The installation instructions for confined spaces in tightly constructed buildings must be followed to ensure adequate air supply . CONFINED SPACE When drawing combustion and dilution air from inside a conventional[...]

  • Page 7

    7 VENT CONNECTION V ent connections must be made to an adequate stack or chimney . Size and install proper size vent pipe. Do not reduce pipe size to less than that of the draft hood outlet. Horizontal runs of vent pipe must have a minimum upward slope toward the chimney of 1/4 inch per foot. Dampers or other obstructions must not be installed in b[...]

  • Page 8

    8 GAS PIPING Contact your local gas service company to ensure that adequate gas service is available and to review applicable installation codes for your area. Size the main gas line in accordance with T able 1. The figures shown are for straight lengths of pipe at 0.5 in. W .C. pressure drop, which is considered normal for low pressure systems. No[...]

  • Page 9

    9 FIGURE 6-THERMOSTAT FOR NATURAL AND PROPANE GASES GAS PRESSURE REGULA TOR The gas pressure regulator is built into the gas valve and is equipped to operate on the gas specified on model and rating plate. The regulator is factory adjusted to deliver gas to burner at correct water column pressure allowing for a nominal pressure drop through the con[...]

  • Page 10

    10[...]

  • Page 11

    11 FOR YOUR SAFETY READ BEFORE LIGHTING • If you cannot reach your gas supplier , call the fire department. C. Use only your hand to push down or turn the gas control knob. Never use tools. If the knob will not push down or turn by hand, don’t try to repair it, call a qualified service technician. Force or attempted repair may result in a fire [...]

  • Page 12

    12 It is recommended that lower water temperatures be used to avoid the risk of scalding. It is further recommended, in all cases, that the water temperature dial be set for the lowest temperature which satisfies your hot water needs. This will also provide the most energy ef ficient operation of the water heater . The water temperature adjusting d[...]

  • Page 13

    13 WARNING F AILURE TO CORRECT BACK DRAFTS MA Y CAUSE AIR CONT AMINA TION AND UNSAFE CONDITIONS. • If the back draf t cannot be corrected by the normal method or if a suit able draft cannot be obtained, a blower type flue gas exhauster must be employed to assure proper venting and correct combustion. HIGH TEMPERA TURE LIMIT SWITCH (Auto Reset T y[...]

  • Page 14

    14 T ABLE 3 INPUT CHECK TIME REQUIRED TO CONSUME 1 CU. FT . OF GAS T ype of BTU Per Approx. Time Required T o Model Gas Cu. Ft. Consume 1 Cu. Ft. of Gas BT -80 Natural 1050 50.3 sec. Prop ane 2500 1 19.8 sec. BT -100 Natural 1050 50.3 sec. Prop ane 2500 1 19.8 sec. Use this formula to “clock” the meter . Be sure that other gas consuming applian[...]

  • Page 15

    15 PREVENTIVE MAINTENANCE RECOMMENDED PROCEDURE FOR PERIODIC REMOV AL OF LIME DEPOSITS FROM T ANK TYPE COMMERCIAL WA TER HEA TERS The amount of calcium carbonate (lime) released from water is in direct proportion to water temperature and usage, see chart. The higher the water temperature or water usage, the more lime deposits are dropped out of the[...]

  • Page 16

    16 DELIMING USING FLO-JUG METHOD UN•LIME in the 5 gallon size is recommended for deliming of the BT -80 and 100 models. UN•LIME with the necessary hoses and fittings to delime your heater is also available as a kit: Up-N-Down Transfer Kit. Cont act your local A.O. Smith dealer , distributor or , A.O. Smith Water Products Company , T elephone: ([...]

  • Page 17

    17 if excessive, can drip into the floor shield. Also, during normal operation there may be occasions when large quantities of water are drawn, chilling the tank bottom. This too can result in condensation. • Condensation, appearing in the vent pipe (water dripping from draft diverter) during heater operation is evidence of poor vent action. Poss[...]

  • Page 18

    18 Model BT Limited W arranty A. O. Smith Corporation, the warrantor, extends the following LIMITED W ARRANTY to the owner of this water heater . 1. THE T ANK If the glass-lined tank in this water heater shall prove upon examination by the warrantor to have leaked due to natural corros ion from potable water therein, during the first THREE years af[...]

  • Page 19

    19[...]

  • Page 20

    20 A.O. SMITH WATER PRODUCTS COMPANY 500 Tennessee Waltz Parkway • Ashland City, TN 37015 PHONE: 1-800-527-1953 www.aosmithwaterheaters.com • E-MAIL: parts@hotwater.com[...]