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A.O. Smith Residential Gas Water Heaters Instruction Manual

Residential gas water heaters
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Download this manual See also: Instruction Manual
ALL TECHNICAL AND WARRANTY QUESTIONS: SHOULD BE DIRECTED TO THE LOCAL DEALER FROM WHOM THE WATER HEATER WAS
PURCHASED. IF YOU ARE UNSUCCESSFUL, PLEASE WRITE TO THE COMPANY LISTED ON THE RATING PLATE ON THE WATER HEATER.
KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE
PRINTED IN THE U.S.A 1204
RESIDENTIAL GAS W
RESIDENTIAL GAS W A A A A A TER HEA
RESIDENTIAL GAS W
RESIDENTIAL GAS W
RESIDENTIAL GAS W
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.

Instruction Manual

NOT FOR USE IN MANUFACTURED (MOBILE) HOMES
•

For Your Safety

AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
1
TER HEA
TER HEA TERS
TER HEA
TERS
TERS
TERS
TER HEA
TERS
•
PART NO. 196293-002

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Summary of Contents for A.O. Smith Residential Gas Water Heaters

  • Page 1: Instruction Manual

    Instruction Manual RESIDENTIAL GAS W RESIDENTIAL GAS W RESIDENTIAL GAS W A A A A A TER HEA TER HEA TER HEA TER HEA TERS TERS TERS TERS RESIDENTIAL GAS W RESIDENTIAL GAS W TER HEA TERS NOT FOR USE IN MANUFACTURED (MOBILE) HOMES •...

  • Page 2: Safe Installation, Use And Service

    SAFE INST SAFE INST SAFE INSTALLA ALLA ALLA ALLATION TION TION, USE AND SERVICE TION , USE AND SERVICE , USE AND SERVICE , USE AND SERVICE SAFE INST SAFE INST ALLA TION , USE AND SERVICE Your safety and the safety of others is extremely important in the installation, use and servicing of this water heater. 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.

  • Page 3: General Safety

    GENERAL SAFETY GENERAL SAFETY GENERAL SAFETY GENERAL SAFETY GENERAL SAFETY...

  • Page 4: Table Of Contents

    T T T T T ABLE OF CONTENTS ABLE OF CONTENTS ABLE OF CONTENTS ABLE OF CONTENTS ABLE OF CONTENTS SAFE INSTALLATION, USE AND SERVICE ......2 Draft Hood Operation ..........17 GENERAL SAFETY ..............3 Condensation ............17,18 TABLE OF CONTENTS .............. 4 Smoke/Odor ..............

  • Page 5: Typical Installation

    TYPICAL INST TYPICAL INST TYPICAL INST TYPICAL INST TYPICAL INSTALLA ALLA ALLA ALLA ALLATION TION TION TION TION GET TO KNOW YOUR WATER HEATER - GAS MODELS A Vent Pipe I Ground Joint Union Q Temperature-Pressure Relief Valve B Drafthood J Drip Leg (Sediment Trap) R Rating Plate C Anode...

  • Page 6: Mixing Valve Usage

    TYPICAL INST TYPICAL INST TYPICAL INSTALLA TYPICAL INST TYPICAL INST ALLA ALLA ALLATION ALLA TION TION TION TION MIXING VALVE USAGE FIGURE 2. This appliance has been design certified as complying with ANSI Z21.10.3 HOTTER WATER CAN SCALD: latest edition for water heaters and is considered suitable for: Water heaters are intended to produce hot water.

  • Page 7: Locating The New Water Heater

    L L L L L OCA TING THE NEW W TING THE NEW W TING THE NEW WA A A A A TER HEA TER HEA TER HEA OCATING THE NEW W TING THE NEW W TER HEA TER HEATER FACTS TO CONSIDER ABOUT THE LOCATION Carefully choose an indoor location for the new water heater, because the placement is a very important consideration for the safety of the...

  • Page 8: Insulation Blankets

    Minimum clearances between the water heater and combustible INSULATION BLANKETS construction are 0 inch at the sides and rear, 4” (102 mm) at the front, and 6” (153 mm) from the vent pipe. Clearance from the top of the jacket is 12” (305 mm) on most models. Note that a lesser dimension may be allowed on some models, refer to the label attached adjacent to the gas control valve on the water heater, see Figure 3.
  • Page 9 A. ALL AIR FROM INSIDE BUILDINGS: (See Figures 4 and 5) Btu per hour (5.5 cm /kW) of total input rating of all equipment in the enclosure, see Figure 7. The confined space shall be provided with two permanent openings communicating directly with an additional room(s) of sufficient volume 3.

  • Page 10: Installing The New Water Heater

    INST INST INST INST INSTALLING THE NEW W ALLING THE NEW W ALLING THE NEW W ALLING THE NEW WA A A A A TER HEA ALLING THE NEW W TER HEA TER HEA TER HEA TER HEATER As water is heated, it expands (thermal expansion) and closed systems WATER PIPING do not allow for the expansion of heated water.

  • Page 11: Temperature-Pressure Relief Valve

    Figure 9 shows the typical attachment of the water piping to the water heater. The water heater is equipped with 1” NPT threaded nipple (75 gallon models) or 1.25” NPT threaded nipple (100 gallon models) water connections. NOTE: If using copper tubing, solder tubing to an adapter before attaching the adapter to the cold water inlet connection.

  • Page 12: Filling The Water Heater

    Vent dampers must bear evidence of certification as complying with FILLING THE WATER HEATER the current edition of the American National Standard ANSI Z21.66 CGA 6.14 (covering electrically and mechanically actuated vent dampers). Before installation of any vent damper, consult the local gas utility for further information.

  • Page 13: Gas Piping

    Make sure the gas supplied is the same type listed on the model rating plate. The inlet gas pressure must not exceed 14 inch water column (2.6 kPa) for natural and propane (L.P.) gas. The minimum inlet gas pressure shown on the rating plate is that which will permit firing at rated input.

  • Page 14: Sediment Traps

    FIGURE 14. GAS PIPING WITH ALL BLACK IRON PIPE TO GAS CONTROL. SEDIMENT TRAPS Use pipe joint compound or teflon tape marked as being resistant to the action of petroleum [Propane (L.P.)] gases. A sediment trap shall be installed as close to the inlet of the water The appliance and its gas connection must be leak tested before placing heater as practical at the time of water heater installation.

  • Page 15: Lighting & Operating Instructions

    FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. BEFORE LIGHTING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED AT FAUCETS This appliance has a pilot which must be lighted by hand.

  • Page 16: For Your Safety Read Before Lighting

    FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. BEFORE LIGHTING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED AT FAUCETS This appliance has a pilot which must be lighted by hand.

  • Page 17: Temperature Regulation

    TEMPERA TEMPERA TEMPERATURE REGULA TURE REGULA TURE REGULATION TURE REGULA TION TION TION TEMPERA TEMPERA TURE REGULA TION Never allow small children to use a hot water tap, or to draw their own Short repeated heating cycles caused by small hot water uses can bath water.

  • Page 18: Smoke/Odor

    OPERATIONAL CONDITIONS Because of the suddenness and amount of water, condensation water may be diagnosed as a “tank leak”. After the water in the tank warms up (about 1-2 hours), the condition should disappear. SMELLY WATER In each water heater there is installed at least one anode rod (see Do not assume the water heater is leaking until there has been enough parts section) for corrosion protection of the tank.

  • Page 19: Periodic Maintenance

    PERIODIC MAINTENANCE PERIODIC MAINTENANCE PERIODIC MAINTENANCE PERIODIC MAINTENANCE PERIODIC MAINTENANCE You should check for sooting. Soot is not normal and will impair proper VENTING SYSTEM INSPECTION combustion. Soot build-up indicates a problem that requires correction before further use. Turn “OFF” gas to water heater and leave off until repairs are made, because failure to correct the cause of the sooting can result in a fire causing death, serious injury, or property damage.

  • Page 20: Anode Rod Inspection

    If the temperature-pressure relief valve on the appliance weeps or INSTALLED IN SUITABLE AREA: To insure sufficient ventilation and discharges periodically, this may be due to thermal expansion. You combustion air supply, proper clearances from the water heater must may have a check valve installed in the water line or a water meter be maintained.

  • Page 21: For Your Information

    SERVICE Use the ”Leakage Checkpoints” guide to check a “Leaking” water heater. Many suspected “Leakers” are not leaking tanks. Often the source of the water can be found and corrected. Before calling for repair service, read the "Start Up Conditions" and Read this manual first.

  • Page 22: Repair Parts

    AIR P AIR P ARTS ARTS REPAIR P AIR P AIR PARTS ARTS ARTS Key No. Part Description Pipe Nipple Burner Tube Burner Head Thermocouple Pilot Draft Hood Draft Hood Brace Inlet Tube Flue Baffle Assembly Anode Rod Cleanout Cover (Optional) Cleanout Gasket (Optional) Cleanout Screw (Optional) Inner Door...

  • Page 23: Troubleshooting Guidelines

    TROUBLESHOOTING GUIDELINES TROUBLESHOOTING GUIDELINES TROUBLESHOOTING GUIDELINES TROUBLESHOOTING GUIDELINES TROUBLESHOOTING GUIDELINES These guidelines should be utilized by a qualified service agent. Problem Cause Solution Improperly sealed, hot or cold supply connection, Tighten threaded connections. relief valve, drain valve, or thermostat threads. WATER LEAKS Leakage from other appliances or water lines.

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