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SERVICE AND MAINTENANCE SUGGESTIONS
GENERAL: All furnaces have been fire-tested to check for proper
operation. This includes, main burner flame, pilot flame, fan op-
eration, fan control, limit control and automatic valve operation. If
the furnace fails to function on initial installation, it is advisable to
re-check the following:
1.
115 volts to the junction box.
2.
Inlet gas pressure.
3.
The 24 volt system.
4.
Type of gas being used and that shown on the rating label.
Standing Pilot Model
Servicing the Pilot and Main Burners, Pilot Orifice, Thermo-
couple, and Main Burner Orifices: Disconnect the gas supply at
the inlet to the control valve. Then remove the burner door to gain
access to the above listed components.
If Electrode Does Not Produce Spark:
1.
Check wire connections.
2.
Check gap for pilot burner to the electrode tip. Should be
between 1/8" (3mm) and 3/16" (4.8mm). Electrode wire and
tip must be more than 1/4" (6.3mm) away from all other metal
components.
If Pilot Does Not Light By Any Means:
1.
Check valve knob for being in the "Pilot" position.
2.
Check pilot adjustment for being full open (counterclockwise
to open).
3.
If gas is available in the supply tubing, the pilot orifice and/or
pilot burner is probably restricted by a spider web. Clean pilot
assembly and relight.
37402-5-0620
If Pilot Does Not Remain On After Releasing Knob:
1.
Follow instructions and hold button down longer and harder.
2.
Determine if pilot flame extends past thermocouple; if not, adjust
input or clean pilot burner.
3.
Replace thermocouple if millivolts read less than 15 millivolts.
Pilot Outage During Normal Operation:
1.
Check air inlet tube for a good tight fit at both ends (6" diameter
tube).
2.
Check burner door and pilot hole cover for tight seal.
3.
Check input by manifold pressure gauge or gas meter.
Main Gas Valve Does Not Open when ON/OFF Device Is
Turned To On:
1.
Check for 24 volts to valve by removing one wire and touching
to the SAME TERMINAL it was on. Terminal should have a
light spark.
2.
To check for line voltage to furnace, remove front panel and
short across two-terminal fan control to allow fan to operate.
Cleaning Combustion (Exchanger) Assembly
A QUALIFIED SERVICE PERSON should remove the combustion
(exchanger) assembly and flue baffles. Apply air pressure to the
inside of the combustion (exchanger) assembly and flue baffles in
order to clear all passageways.
Oiling the Motor
The Fan motor should be cleaned and oiled once each heating
season. Oil holes are located on the top at each end of the mo-
tor. Use a few drops of #10 motor oil. To clean the motor, blow
air through its ventilation openings with a vacuum cleaner or low
pressure air source.
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