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507388-01
Issue 1732
Flue Collector Box
Remove these screws
to remove Combustion
inducer
Inducer prover
switch
Loosen these screws to
remove control board
mounting bracket
Ignition Control
Board
Remove these screws
to remove Burner
Assembly
Igniter
Combustion
Inducer
Gas Valve
Primary Limit
(Mounted to Vest panel)
Gas Manifold
Flame sensor
(mounted to top of
Burner Assembly)
Rollout switch
Burner & Manifold
Assembly
Figure 8. Component Layout
Continuous Fan Operation
Continuous operation of the air handling blower will be
obtained if the thermostat fan switch is set to “ON”. With
the thermostat fan switch set to “AUTO”, the air handling
blower will cycle corresponding with the thermostat cycling.
To Shut Down Unit
For temporary or short periods of shutdown, set the
thermostat system switch to “OFF”. For a prolonged period
of shutdown, set the thermostat system switch to “OFF”
and turn off the electrical power supply and the gas supply
to the unit.
Maintenance
Refer to Figure 8 for heating compartment component
layout.
It is recommended that the furnace be inspected annually
by a qualified service person.
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow safety warnings exactly could result in
dangerous operation, Serious injury, death or property
damage.
Improper servicing could result in dangerous operation,
Serious injury, death or property damage
• Before servicing, disconnect all electrical power to
furnace
• When servicing controls, label all wires prior to
disconnecting reconnect wires correctly.
•
Any disassembly of components containing flue
or vent gases shall be done by a qualified service
agency.
• Verify proper operation after servicing.
WARNING
