GSW 72090 manual Thermostat Fails to Shut

Page 23

PROBLEM

 

POSSIBLE CAUSE(S)

 

CORRECTION

 

 

 

 

 

 

1.

Thermostat set too low

1.

Turn temperature dial to desired setting

 

2.

Sediment or lime in tank

2.

Drain/flush-provide water treatment if need-

 

 

 

 

ed

 

3.

Water heater too small

3.

Install adequate size heater

 

4.

Wrong piping connections

4.

Correct piping-dip tube must be in cold inlet

INSUFFICIENT HOT WATER

 

 

5.

Repair faucets

 

5.

Leaking faucets

6.

Advise customer

 

6.

Wasted hot water

7.

Insulate piping

 

7.

Long runs of exposed piping

8.

Insulate piping

 

8.

Hot water piping in outside wall

9.

Check with gas utility company

 

9.

Low gas pressure

 

 

 

 

 

 

 

 

1.

Insufficient secondary air

1.

Provide ventilation to water heater. Check

 

 

 

 

flue way, flue baffle and burner

 

2.

Flue clogged

2.

Clean flue, locate source and correct

 

3.

Low gas pressure

3.

Check with gas utility company

SLOW HOT WATER RECOVERY

4.

Improper calibration

4.

Replace gas control/thermostat

5.

Gas control/thermostat set too low

5.

Turn temperature dial to desired setting

 

6.

Water heater too small

6.

Install adequate size heater

 

7.

Wrong piping connections

7.

Correct piping-dip tube must be in cold inlet

 

8.

Wasted hot water

8.

Advise customer

 

 

 

 

 

 

 

 

 

1.

Excessive water pressure

1.

Use a pressure reducing valve and relief

 

 

 

 

valve

DRIP FROM RELIEF VALVE

2.

Heater stacking

2.

Lower the thermostat setting

 

3.

Closed water system

3.

See “Closed System/Thermal Expansion”

 

4.

Temperature setting too high

4.

Decrease the temperature setting

 

 

 

 

 

THERMOSTAT FAILS TO SHUT

1.

Defective gas control/thermostat

1.

Replace gas control/thermostat

OFF

2.

Improper calibration

2.

Replace gas control/thermostat

 

 

 

 

 

 

1.

Insufficient secondary air

1.

Provide ventilation to water heater. Check

COMBUSTION ODOURS

 

 

 

flue way, flue baffle, burner

2.

Flue clogged

2.

Clean, locate source and correct

 

 

3.

Heater installed in a confined area

3.

Provide fresh air ventilation

 

 

 

 

 

 

1.

Insufficient secondary air

1.

Provide ventilation to water heater. Check

 

 

 

 

flue way,flue baffle, burner

SMOKING AND CARBON FOR-

2.

Low gas pressure

2.

Check with gas utility company

3.

Flue clogged

3.

Clean, locate source and correct

MATION (SOOTING)

4.

Defective gas control/thermostat

4.

Replace gas control/thermostat

 

 

5.

Heater installed in a confined area

5.

Provide fresh air ventilation

 

6.

Burner flame yellow-lazy

6.

See “Burner Flame Yellow-Lazy”

 

 

 

 

 

CONDENSATION

1.

Temperature setting too low

1.

Increase the temperature setting

2.

Water heater too small

2.

Install adequate size heater

 

 

 

 

 

 

 

1.

Orifice too large

1.

Replace with correct orifice

BURNER FLAME FLOATS AND

2.

High gas pressure

2.

Check with gas utility company

3.

Flue clogged

3.

Clean flue and burner-locate source & cor-

LIFTS OFF PORTS

 

 

 

rect

 

 

 

 

 

4.

Cold drafts

4.

Locate source and correct

 

 

 

 

 

BURNER FLAME TOO HIGH

1.

Orifice too large

1.

Replace with correct orifice

 

 

 

 

 

 

1.

Defective gas control/thermostat

1.

Replace gas control/thermostat

FLAME BURNS AT ORIFICE

2.

Low gas pressure

2.

Check with gas utility company

 

3

Orifice not properly installed

3

Reinstall the orifice

 

 

 

 

 

– 23 –

Image 23
Contents What to do if YOU Smell GAS For Your SafetyPage Limited Warranty Viii Troubleshooting GuideIX Repair Parts Illustration User Responsibilities Introduction II SafetyFor Installations in Canada For Installations in the United StatesBackflow Prevention Safety Warning Flammable VapoursSafety Warning Scalding Safety Warning Carbon MonoxideEarthquake Zones Clearances and AccessibilityLocation Requirements Result in a Fire Hazard Failure to Properly Install this Heater MAYGas Supply Gas line purging Gas Leak TestingGas Pressure Local Codes Confined Space Air Requirements for Canadian InstallationsAir Requirements Confined Space Air Requirements for Installations Water Supply Exhaust VentingDo not remove valve Valve is dripping or leaking, have aLicensed plumber repair it Do not plug valveDischarge Line Installations CheckTemperature And Pressure Relief Valve Temperature Adjustment IV Operating Instructions Water Temperature RegulationWhat to do if YOU Smell GAS Lighting Instructions Robertshaw 110RLighting Instructions Robertshaw 220R Avant Lighting Instructions White-Rodgers 37COperating Conditions Operation Burner FlamesEmergency Shut Down Checking the DraftPeriodic Inspection VI MaintenanceDraining and Flushing Temperature and Pressure Relief Valve External Cleaning Flame-arresterResetting and Replacing the Safety TCO Switch System Requirements VII Combo HeatingProblem Possible Causes Correction Viii Troubleshooting GuideThermostat Fails to Shut Repair Parts IX Repair Parts IllustrationWHO is Covered Limited WarrantyHOW the Original Owner can Make a Warranty Claim

72090 specifications

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