A.O. Smith 185874-001 Instruction Manual
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A.O. Smith 185874-001 Instruction Manual

A.O. Smith 185874-001 Instruction Manual

A.o. smith residential hybrid gas water heater instruction manual
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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 0807
resIdentIal Gas water heaters
GAMA certification applies
to all residential gas water
heaters with capacities of 20
to 100 gallons with input rating
of 75,000 BTU/Hr. or less.
whenever MaIntenance adjustMent or servIce Is requIred.
Instruction Manual
FOR USE ONLY IN MANUFACTURED HOMES
C3 Technology® Gas Water Heaters meet the new ANSI Z21.10.1
standard that deals with the accidental or unintended ignition of
flammable vapors, such as those emitted by gasoline.
•

for Your safety

AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
•
185874-001

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Summary of Contents for A.O. Smith 185874-001

  • Page 1: For Your Safety

    C3 Technology® Gas Water Heaters meet the new ANSI Z21.10.1 standard that deals with the accidental or unintended ignition of flammable vapors, such as those emitted by gasoline. • for Your safety AN ODORANT IS ADDED TO THE GAS USED BY THIS WATER HEATER. • 185874-001...

  • Page 2: Safe Installation, Use And Service

    safe InstallatIon, 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...

  • Page 4: Table Of Contents

    SAFE INSTALLATION, USE AND SERVICE...2 GENERAL SAFETY...3 TABLE OF CONTENTS ...4 INTRODUCTION ...4 Preparing for the New Installation ...4 TYPICAL INSTALLATIONS ... 5-6 LOCATING THE NEW WATER HEATER ...7 Facts to Consider About Location ... 7-8 Insulation Blankets ...8 INSTALLING THE NEW WATER HEATER ... 9-18 Securing Water Heater to Floor and Wall ...9 T &...

  • Page 5: Typical Installations

    Get to Know Your water heater - Gas Models a vent pipe drafthood anode hot water outlet outlet roof jack Gas supply Manual Gas shut-off valve Ground joint union * Install In accordance wIth local codes. * drIp leG as requIred BY local codes.
  • Page 6 InstallatIon In enclosure of Manufactured hoMe wIth louvered eXterIor door * MIXInG valve usaGe This appliance has been design certified as complying with American National Standard/CSA Standard for water heaters and is considered suitable for: water (potable) heating: All models are considered suitable for water (potable) heating.

  • Page 7: Locating The New Water Heater

    locatInG the new water heater facts to consIder aBout the locatIon This manufactured home gas-fired water heater is for use in a manufactured home. You should carefully choose an indoor location for the new water heater, because the placement is a very important consideration for the safety of the occupants in the building and for the most economical use of the appliance.

  • Page 8: Insulation Blankets

    Also, the water heater must be located and/or protected so it is not subject to physical damage by a moving vehicle. This water heater must not be installed directly on carpeting. Carpeting must be protected by metal or wood panel beneath the appliance extending beyond the full width and depth of the appliance by at least 3 inches (76.2 mm) in any direction, or if the appliance is installed in an alcove or closet, the entire floor must be covered by...

  • Page 9: Installing The New Water Heater

    InstallInG the new water heater securInG water heater to floor and wall The water heater must be secured to the floor and to the wall of the enclosure with the three mounting brackets and screws packaged in the carton with the water heater. The two small brackets stamped #0110064 are used to attach the water heater to the floor and the one large bracket #0110063 is used to secure the top of the water heater to the wall.

  • Page 10: Water Piping Pressure Test

    The water within the water heater tank expands as it is heated and increases the pressure of the water system. If the relieving point of the water heater’s temperature-pressure relief valve is reached, the valve will relieve the excess pressure. the temperature-pressure relief valve is not intended for the constant relief of thermal expansion.

  • Page 11: Temperature Pressure Relief Valve

    This heater is provided with a properly certified combination temperature - pressure relief valve by the manufacturer. The valve is certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment of materials as meeting the requirements for Relief Valves for Hot Water Supply Systems, ANSI Z21.22 •...

  • Page 12: Venting

    To fill the water heater with water: 1. Close the water heater drain valve by turning the handle to the right (clockwise). The drain valve is on the lower front of the water heater. 2. Open the cold water supply valve to the water heater. note: the cold water supply valve must be left open when the water heater is in use.

  • Page 13: Gas Piping

    Chemical vapor corrosion of the flue and vent system may occur if air for combustion contains certain chemical vapors. Spray can propellants, cleaning solvents, refrigerator and air conditioner refrigerants, swimming pool chemicals, calcium and sodium chloride, waxes, bleach and process chemicals are typical compounds which are potentially corrosive.

  • Page 14: Sediment Traps

    Connecting the gas piping to the gas control valve of the water heater can be accomplished by either of the two methods shown in Figures 9 and 10. sedIMent traps A sediment trap shall be installed as close to the inlet of the water heater as practical at the time of water heater installation.
  • Page 15 9. Remove flange nuts holding inner door in place with 3/8” nut driver, see Figure 13. fIGure 13. 10. Loosen flare nut “T” holding thermocouple to bottom of gas valve with 3/8” open-end wrench and pull down to remove, see Figure 11.

  • Page 16: From Propane (L.p.) To Natural Gas

    23. Place screwdriver in slot “C”, see Figure 19. Depress and turn counterclockwise ( ) to stop. Control screw must be in “IN” position for propane (LP) gas and in “OUT” position for natural gas. STOP! Read label “For Your Safety” located on your water heater.
  • Page 17 fIGure 21. 8. Unplug wire from igniter assembly mounted on the side of the gas valve. 9. Remove flange nuts holding inner door in place with 3/8” nut driver, see Figure 22. fIGure 22. 10. Loosen flare nut “T” holding to bottom of gas valve with 3/8” open-end wrench and pull down to remove, see Figure 23.

  • Page 18: From Natural Gas To Propane (L.p.) Gas

    19. Push the propane gas pilot assembly grommet out of the inner door towards the combustion chamber. 20. To install the natural gas pilot assembly, pull the igniter wire, thermostat lead, and pilot tube through the inner door hole. Reinstall the Phillips-head screw securing the TCO bracket too the burner tube.

  • Page 19: White-Rodgers Gas Valve

    whIte-rodGers Gas valve...

  • Page 20: Robertshaw Gas Valve

    roBertshaw Gas valve...

  • Page 21: Instatllation Checklist

    InstallatIon checKlIst Before lIGhtInG the pIlot: 1. Check the gas lines for leaks. a. Use a soapy water solution. DO NOT test for gas leaks using a match or open flame. b. Brush the soapy water solution on all gas pipes, joints and fittings.

  • Page 22: Temperature Regulation

    teMperature reGulatIon Short repeated heating cycles caused by small hot water uses can cause temperatures at the point of use to exceed the thermostat setting by up to 30°F (16.7°C). If you experience this type of use you should consider using lower temperature settings to reduce scald hazards.

  • Page 23: For Your Information

    start up condItIons draft hood operatIon Check draft hood operation by performing a worst case depressurization of the building. With all doors and windows closed, and with all air handling equipment and exhaust fans operating such as furnaces, clothes dryers, range hoods and bathroom fans, a match flame should still be drawn into the draft hood of the water heater with its burner firing.

  • Page 24: High Water Temperature Shut Off System

    the local water heater supplier or service agency for further information concerning an Anode Replacement Kit and this chlorination treatment. If the smelly water persists after the anode replacement and chlorination treatment, we can only suggest that chlorination or aeration of the water supply be considered to eliminate the water problem.

  • Page 25: Periodic Maintenance

    ventInG sYsteM InspectIon At least once a year a visual inspection should be made of the venting system. You should look for: 1. Obstructions which could cause improper venting. The combustion and ventilation air flow must not be obstructed. 2. Damage or deterioration which could cause improper venting or leakage of combustion products.

  • Page 26: Anode Rod Inspection

    anode rod InspectIon Each water heater contains at least one anode rod, which will slowly deplete while protecting the glass-lined tank from corrosion and prolonging the life of the water heater. Once the anode is depleted, the tank will start to corrode, eventually developing a leak. Certain water conditions will cause a reaction between this rod and the water.

  • Page 27: Draining

    1. Turn the gas control knob to the “OFF” position. 2. CLOSE the cold water inlet valve to the water heater. 3. OPEN a nearby hot water faucet and leave open to allow for draining. 4. Connect a hose to the drain valve and terminate to an adequate drain.

  • Page 28: Leakage Checkpoints

    leaKaGe checKpoInts Read this manual first. Then before checking the water heater make sure the gas supply has been turned “OFF”, and never turn the gas “ON” before the tank is completely full of water. A. Water at the draft hood is water vapor which has condensed out of the combustion products.

  • Page 29: Repair Parts

    30 & 40 Gallon repaIr parts lIst Key No. Part Description Burner Assembly (White-Rodgers)** Burner Assembly (RobertShaw)** Burner Head (Natural Gas) Burner Head (Propane Gas) Burner Orifice (Natural Gas) Burner Orifice (Propane Gas) Burner Tube (White-Rodgers)** Burner Tube (RobertShaw)** Pilot Assembly (Natural Gas) Pilot Assembly (Propane Gas) Inner Door Inner Door Gasket...

  • Page 30: Repair Parts

    50 Gallon repaIr parts lIst Key No. Part Description Burner Assembly (White-Rodgers)** Burner Assembly (RobertShaw)** Burner Head (Natural Gas) Burner Head (Propane Gas) Burner Orifice (Natural Gas) Burner Orifice (Propane Gas) Burner Tube (White-Rodgers)** Burner Tube (RobertShaw)** Pilot Assembly (Natural Gas) Pilot Assembly (Propane Gas) Inner Door Inner Door Gasket...

  • Page 31: Troubleshooting Guidelines

    trouBleshootInG GuIdelInes These guidelines should be utilized by a qualified service agent. When calling for service notify the service agent that this is a “Flammable Vapor Ignition Resistant” Product. Problem Cause Improperly sealed, hot or cold supply connection, relief valve, drain valve, or thermostat threads.

This manual is also suitable for:

Fmv-30Fmv-40Fmv-50

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