A.O. Smith Water Heater POSSIBLE CAUSES 1. Thermostat set too high, Problem

PROBLEM

HIGH OPERATION COSTS

INSUFFICIENT HOT WATER

SLOW HOT WATER

RECOVERY

DRIP FROM RELIEF VALVE

THERMOSTAT FAILSTO SHUT-OFF

COMBUSTION ODORS

POSSIBLE CAUSE(S)

1.Thermostat set too high

2.Sediment or lime in tank

3.Water heater too small for job

4.Wrong piping connections

5.Leaking faucets

6.Gas leaks

7.Wasted hot water

8.Long runs of exposed piping

9.Hot water piping in exposedwall

1.Thermostat set too tow

2.Sediment or time intank

3.Water heater too small

4.Wrong piping connections

5.Leaking faucets

6.Wasted hot water

7.Long runs of exposed piping

8.Hot water piping in outside wall

9.Low gas pressure

1.Insufficient secondary air

2.Water heater flue or vent system blocked

3.Low gas pressure

4.Improper calibration

5.Thermostat set too low

6.Water heater too small

7.Wrong piping connections

8.Wasted hot water

1.Excessive water pressure

2.Heater stacking

3.Closed water system

,Thermostat not functioning prop- erly

2.Improper calibration

1.Insufficient secondary air

2.Water heater flue or vent system blocked

3.Heater installed in a confined area

CORRECTIVE ACTION

1.Set temperature dial to lower setting

2.Drain/flush-provide water treatment if needed

3.Install adequate heater

4.Correct piping-dip tube must be in cold inlet

5.Repair faucets

6.Check with utility-repair at once

7.Advise customer

8.Insulate p!p!ng

9.Insulate piping

1.Turn temperature dial to desired setting

2.Drain/flush-provide water treatment if needed

3.Install adequate heater

4.Correct piping-dip tube must be in cold inlet

5 Repair faucets

6.Advise customer

7.Insulate piping

8.Insulate I_iping

9.Check with gas utility company

1.Provide ventilation to water heater. Check

flue way, flue baffle, and burner

2.Clean flue, locate source and correct

3.Check with gas utility company

4.Replace thermostat

5.Turn temperature dial to desired setting

6.Install adequate heater

7.Correct piping-dip tube must be in cold inlet

8.Advise customer

,Use a pressure reducing valve and relief valve

,Lower the thermostat setting

3.See "Closed System/Thermal Expansion"

1.Replace thermostat

2.Replace thermostat

1.Provide ventilation to water heater. Check flue

way, flue baffle, and burner

,Clean, locate source and correct

SMOKING AND CARBON FORMATION (SOOTING)

CONDENSATION

BURNER FLAME FLOATS AND LIFTS OFF PORTS

1.Insufficient secondary air

2.Low gas pressure

3.Water heater flue or vent system blocked

4.Thermostat not functioning prop- erly

5.Heater installed in a confined area

6.Burner flame yellow-lazy

1.Temperature setting too low

1.Orifice too large

2.High gas pressure

3.Water heater flue or vent system blocked

4.Cold drafts

3.Provide fresh air ventilation

1.Provide ventilation to water heater. Check

flue way, flue baffle, burner

2.Check with gas utility company

3.Clean, locate source and correct

4.Replace thermostat

5.Provide fresh air ventilation

6.See "Burner Flame Yellow-Lazy"

1.Increase the temperature setting

,Replace with correct orifice

2.Check with gas utility company

3.Clean flue and burner-locate source and cor- rect

,Locate source and correct

BURNER FLAME TOO HIGH	1.	Orifice too large
FLAME BURNS AT ORIFICE	1.	Thermostat not functioning prop-
		erly
	2.	Low gas pressure
PILOT FLAME	1.	Pilot line or orifice clogged
TOO SMALL	2.	Low gas pressure

1.Replace with correct orifice

1.Replace thermostat

2.Check with gas utility company

1.Clean, locate source and correct

2.Check with gas utility company

3O