A.O. Smith 185874-001, FMV-40, FMV-30, FMV-50 Drain Valve Washer Replacement, Service

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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.

5.OPEN the water heater drain valve to allow for tank draining.

Note: If the water heater is going to be shut down and drained for an extended period, the drain valve should be left open with hose connected allowing water to terminate to an adequate drain.

6.CLOSE the drain valve.

7.Follow instructions in the “Filling The Water Heater” section.

8.Follow the lighting instructions on the label or see page 14 under

“Lighting Instructions” to restart the water heater.

Drain Valve Washer Replacement

(See Figure 33)

1.Follow “Draining” instructions.

2.Turning counterclockwise (), remove the hex cap below the screw handle.

3.Remove the washer and put the new one in place.

4.Screw the handle and cap assembly back into the drain valve and retighten using a wrench. DO NOT OVER TIGHTEN.

5.Follow instructions in the “Filling The Water Heater” section.

6.Check for leaks.

FIGURE 33.

Service

If a condition persists or you are uncertain about the operation of the water heater contact a service agency.

Use this 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.

If you are not thoroughly familiar with gas codes, your water heater, and safety practices, contact your gas supplier or qualified installer to check the water heater.

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Contents Residential GAS Water Heaters Important Definitions Safe INSTALLATION, USE and ServiceGeneral Safety Introduction Table of ContentsRobertshaw Typical InstallationsInstall PER Local Codes WHITE-RODGERSHotter Water can Scald Facts to Consider About the Location Locating the NEW Water HeaterInsulation Blankets Water Piping Installing the NEW Water HeaterSecuring Water Heater to Floor and Wall Valve and Pipe InsulationTemperature-Pressure Relief Valve Water Piping Pressure TestOr Property Damage Filling the Water Heater Venting Draft Hood InstallationGas Piping Sediment Traps GAS Piping with Flexible ConnectorPage Page Page Page WHITE-RODGERS GAS Valve Robertshaw GAS Valve Before Lighting the Pilot Installation ChecklistRobertshaw Temperature Adjustment Dial Temperature RegulationFor Your Information Start UP ConditionsOperational Conditions AIR in HOT Water Faucets High Water Temperature Shut OFF SystemBurner Inspection Periodic MaintenanceBurner Cleaning Venting System InspectionTemperature-Pressure Relief Valve Operation Anode ROD InspectionDraining Service Drain Valve Washer ReplacementLeakage Checkpoints This is a Repair Parts LIST, not a Packing List 30 & 40 Gallon Repair Parts ListWHITE-RODGERS Burner Assembly Robertshaw Burner Assembly Thermostat ShieldGallon Repair Parts List Problem Cause Solution Troubleshooting Guidelines