A.O. Smith Water Heater HWB-670 Propane

Pilot Burner - Electronic Ignition

Open fused disconnect switch or shut off electrical power to the boiler.

Turn the gas valve control knob counterclockwise to the 'PILOT' position.

Close fused disconnect switch to restore electrical power to the boiler.

Did the pilot ignite with the combination gas valve knob set at 'PILOT' and the system calling for heat?

Adjust pilot flame to cover 3/8" to 1/2" (10-12mm) of the sensing probe tip.

Did the main burner light after the pilot burner ignited?

If the main burner fails to light, check the following:

Replace valve if electrical power and gas are present but the valve does not open when system calls for heat.

Attach the leads from a millivolt meter to the thermocouple and junction block and record the reading

Is the thermocouple reading above 14 to 18 millivolts?

Transfer the lead on the junction block to other terminal and record the reading

Is the voltage supply reading between 8 to 14 millivolts?

If the reading is less than 8 millivolts, describe the issues found with the junction block connections and protector switch leads

Measure the millivolt drop across the contacts

Oil the three oil cups (2 on the motor, 1 on the pump) as instructed on the oil tube supplied with the unit.

Was the circulator oiled before operation?

Lubricate the three oil cups at least once every four months during the heating season.

Lubricate combination heating-cooling systems every four months year-round.

Enter the amount of oil used in bearing oil cups (in teaspoons).

Enter the amount of oil used in motor oil cups (in drops).

Inspect boiler mounted gas controls for proper operation

Inspect boiler mounted electrical controls for proper operation

Is a more frequent inspection necessary based on water conditions?

Notes or observations from the inspection

Ensure the circulator pump is not in operation

Verify the oil tube is supplied with the unit

Identify the oil cups to be lubricated

Add 2 or 3 teaspoons of No. 20 non-detergent motor oil to the bearing oil cups

Add 10 or 12 drops of No. 20 non-detergent motor oil to the motor oil cups

Was the lubrication process completed successfully?