F'GU.E13
Blower Motor Speed Taps (3-Speed and 4-Speed Motors)
I BE SURE TO CHECK BLOWER MOTOR I
SPEED DATA IN UNITS
TECHNICAL INFORMATION LABEL
ON THE UNIT
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YELLO?L
10. OPERATION
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Once the thermostat is satisfied, the fan control will operate
the blower for 30 additional seconds.
11. MAINTENANCE
Electrical shock hazard.
Turn off electric power supply at disconnect switch or service
panel before removing any access or service panel from unit.
Failure to follow this warning can result in property damage,
personal injury, and/or death.
COMBUSTION/INDOOR FAN CONTROL
All functions of the combustion and indoor blower are
controlled by the fan control module.
On a call for heat:
The fan control energizes the combustion blower. Once the
combustion air proving switch closes, the ignition sequence
begins. The fan control will sense when the main operator
of gas valve has been energized thereby firing the burners
and starting the "delay on" timing sequence of the indoor
blower.
NOTE: Ifthe control senses that one of the safety limits has
opened, the combustion and indoor fans will operate until
the limit resets.
On a call for cooling:
The fan control starts the indoor blower at 0 or 30 seconds.
MONTHLY MAINTENANCE AND INSPECTION
CHECKS
Air Filters
CAUTION
Do NOT operate without air filters.
Inspect filters at least monthly and replace or clean as
required. Washable filters may be cleaned by soaking in
mild detergent and rinsing with cold water. Replace filters
with the arrows on the side pointing in the direction of air
flow. Dirty filters are the most common cause of inadequate
heating or cooling performance, and of compressor
failures.
HEATING SEASON CHECKS (MONTHLY)
Pilot Flame
While the main burner is on, the flame should envelop the
upper part of the flame sensor.
Main Burner Flame
Flames should be stable and solid blue, (dust may cause
orange tips or they may have wisps of yellow, but they
MUST not have solid yellow tips). They should extend
directly into the heat exchanger tubes and the turbulators
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