SCHEDULED MAINTENANCE
49
FLAME SENSOR (QUALIFIED SERVICER ONLY)
Under some conditions, the fuel or air supply can cre-
ate a nearly invisible coating on the flame sensor. This
coating acts as an insulator causing a drop in the flame
sense signal. If the flame sense signal drops too low the
furnace will not sense flame and will lock out. The flame
sensor should be carefully cleaned by a qualified servicer
using emery cloth or steel wool. Following cleaning, the
flame sense signal should be as indicated in the Speci
-
fications Sheet.
FLUE PASSAGES (QUALIFIED SERVICER ONLY)
The heat exchanger flue passageways should be in
-
spected at the beginning of each heating season.
Before Leaving an Installation
• Cycle the furnace with the thermostat at least three times.
Verify cooling and fan only operation.
• Review the Owner’s Manual with the homeowner and
discuss proper furnace operation and maintenance.
• Leave literature packet near furnace.
Repair and Replacement Parts
• When ordering any of the listed functional parts, be sure
to provide the furnace model, manufacturing, and serial
numbers with the order.
• Although only functional parts are shown in the parts
list, all sheet metal parts, doors, etc. may be ordered by
description.
• Parts are available from your distributor.
Functional Parts List-
Gas Valve
Blower Motor
Gas Manifold
Blower Wheel
Natural Gas Orifice
Blower Mounting Bracket
Propane Gas Orifice
Blower Cutoff
Igniter
Blower Housing
Flame Sensor
Inductor
Rollout Limit Switch
Heat Exchanger with
Primary Limit Switch
Recuperator Coil
Auxiliary Limit Switch
Coil Front Cover
Pressure Switch
Integrated Control Module
Induced Draft Blower
Transformer
Door Switch Bluetooth Module
WARNING
HIGH
VOLTAGE
D
ISCONNECT
ALL
POWER BEFORE SERVICING OR
INSTALLING THIS UNIT.
M
ULTIPLE POWER SOURCES MAY
BE PRESENT.
F
AILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH.
I
F YOU MUST HANDLE THE ITNITOR, HANDLE WITH CARE.
T
OUCHING
THE IGNITOR BODY WITH BARE FINGERS, ROUGH HANDLING, OR
VIBRATION COULD RESULT IN EARLY IGNITOR FAILURE.
O
NLY A
QUALIFIED SERVICER SHOULD EVER HANDLE THE IGNITOR.
CAUTION
ANNUAL INSPECTION
The furnace should be inspected by a qualified installer, or
service agency at least once per year. This check should be
performed at the beginning of the heating season. This will
ensure that all furnace components are in proper working
order and that the heating system functions appropriately. Pay
particular attention to the following items. Repair or service
as necessary.
•
Flue pipe system. Check for blockage and/or leakage.
Check the outside termination and the connections at
the furnace.
•
Combustion air intake pipe system (where applicable).
Check for blockage and/or leakage. Check the outside
termination and the connection at the furnace.
•
Heat exchanger. Check for corrosion and/or buildup
within the heat exchanger passageways.
•
Burners. Check for proper ignition, burner flame, and
flame sense.
•
Drainage system. Check for blockage and/or leakage.
Check hose connections at and internal to furnace.
•
Wiring. Check electrical connections for tightness and/
or corrosion. Check wires for damage.
•
Filters.
