Filter
Top Products
35
CONDENSATE TRAP AND DRAIN SYSTEM (QUALIFIED SERVICER
ONLY)
Annually inspect the drain tubes, drain trap, and field-supplied drain
line for proper condensate drainage. Check drain system for hose
connection tightness, blockage, and leaks. Clean or repair as
necessary.
FLAME SENSOR (QUALIFIED SERVICER ONLY)
Under some conditions, the fuel or air supply can create 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 clean-
ing, the flame sense signal should be as indicated in the Specifi-
cations Sheet.
FLUE PASSAGES (QUALIFIED SERVICER ONLY)
The heat exchanger flue passageways should be inspected at the
beginning of each heating season. If necessary, clean the pas-
sageways as outlined below.
1. Turn OFF the electrical power and gas supply to the furnace.
2. Disconnect the gas line and remove the burner/ manifold
assembly by removing the screws securing the assembly
to the partition panel.
3. Disconnect the flue pipe system from the induced draft
blower.
4. Remove the induced draft blower and, drain and pressure
tap hoses from the recuperator coil front cover.
5. Remove the recuperator coil front cover to expose the coil
tubes and turbulators.
6. Remove the recuperator coil turbulators individually by slowly
pulling each turbulator forward firmly.
7. Clean the recuperator coil tubes using a long handle wire
brush, such as a gun cleaning brush.
8. Clean the primary heat exchanger tubes using a wire brush
attached to a length of high grade stainless steel cable,
such as drain cleanout cable. Attach a variable speed
reversible drill to the other end of the cable. Slowly rotate
the cable with the drill and insert it into one of the heat
exchanger tubes. While reversing the drill, work the cable
in and out several times to obtain sufficient cleaning. Repeat
for each tube.
9. Clean residue from furnace using a vacuum cleaner.
10. Replace the parts removed in the previous steps in reverse
order.
11. Turn on electrical power and gas to furnace. Check for
leaks and proper unit operation.
12. Severe heat exchanger fouling is an indication of an
operational problem. Perform the checks listed in Section
XIV, Startup Procedure and Adjustments to reduce the
chances of repeated fouling.
XX
XX
X
X. INTERNAL FILX. INTERNAL FIL
X. INTERNAL FILX. INTERNAL FIL
X. INTERNAL FIL
TER REMTER REM
TER REMTER REM
TER REM
OVOV
OVOV
OV
ALAL
ALAL
AL
Internal filters are an accessory item and are not included with your
furnace. For further details, see your distributor.
BOTTOM RETURN REMOVAL
1. Turn OFF electrical power to furnace.
2. Remove blower compartment door.
3. Push back and up on the wire filter retainer to release it
from under the front lip of the furnace basepan.
4. Slide filter forward and out.
5. Replace filter by reversing the procedure.
BLOWER COMPARTMENT REMOVAL
1. Turn OFF electrical power to furnace.
2. Remove blower compartment door.
3. Grasp lower portion of filter and lift up.
Front of Furnace
Blower
Grab Here
And Lift
F
i
l
t
e
r
Front of Furnace
Blower
4. Angle filter toward the blower until filter clears bottom rail.
5. Lower filter down and pull outward.
Front of Furnace
Blower
Front of Furnace
Blower
6. Replace filter by reversing procedure.
XX
XX
X
XI. BEFOXI. BEFO
XI. BEFOXI. BEFO
XI. BEFO
RE LEARE LEA
RE LEARE LEA
RE LEA
VINVIN
VINVIN
VIN
G AN INSTG AN INST
G AN INSTG AN INST
G AN INST
ALLALL
ALLALL
ALL
AA
AA
A
TITI
TITI
TI
OO
OO
O
NN
NN
N
• 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.
XX
XX
X
XII. REPXII. REP
XII. REPXII. REP
XII. REP
AIR & REPLAIR & REPL
AIR & REPLAIR & REPL
AIR & REPL
ACEMENT PARACEMENT PAR
ACEMENT PARACEMENT PAR
ACEMENT PAR
TSTS
TSTS
TS
• 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 Capacitor