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10
transfer process. Therefore, once it
has been operated, it cannot be turned
off and left off for an extended period
of time when temperatures will reach
32°F or lower unless winterized. Fol-
low these procedures to winterize your
furnace:
1. Obtain propylene glycol (RV/
swimming pool antifreeze or
equivalent).
2. Turn off electrical supply to the
furnace. (See Fig. 20.)
3. Remove main furnace door.
(See Fig. 23.)
4. Remove upper inducer housing
drain connection cap.
(See Fig. 40.)
5. Connect field-supplied 1/2-in.
ID tube to upper inducer housing
drain connection.
6. Insert field-supplied funnel into
tube.
40
41
7. Pour 1 quart of antifreeze into
funnel/tube. Antifreeze should
run through inducer housing,
overfill condensate trap, and flow
into open field drain. (See Fig. 41.)
8. Remove funnel and tube from
inducer housing and replace drain
connection cap and clamp.
9. Replace main furnace door.
(See Fig. 34.)
10. Propylene glycol need not be
removed before restarting
furnace.
A CHECK-UP
CHECKLIST
Your furnace represents an important
investment in your family’s comfort
and your home’s value. To keep it
performing properly and to prevent
future problems, have a trained service
specialist give your furnace a profes-
sional check-up annually. The follow-
ing checklist can be used as a guideline
to proper service:
• Inspect all flue gas passages, burn-
ers, heat exchangers, coupling
box(es), and inducer assembly.
• Inspect all combustion-air and vent
piping inside structure and pipe termi-
nations outside the structure.
• Check gas pipes leading to and
inside of your furnace for leaks.
• Inspect and clean the blower motor
and wheel.
NOTE: The inducer and blower motors
are pre-lubricated and require no addi-
tional lubrication. These motors can be
identified by the absence of oil ports on
each end of the motor.
• Inspect and change or clean air fil-
ter(s) if necessary.
• Inspect all supply- and return-air
ducts for obstructions, air leaks, and
insulation. Remedy any problem when
necessary.
• Inspect the return-air duct connec-
tion(s) at the furnace to ensure it is
physically sound, sealed to the furnace
casing, and terminates outside the
space containing the furnace.
• Inspect electrical wiring, connec-
tions, and components for loose
connections.
• Perform an operational checkout to
determine whether your furnace is
working properly and if it requires
adjustments.
• Inspect all condensate drain tubes
and condensate trap assembly for
leaks. The condensate removal system
should be cleaned annually by a quali-
fied service agency. Refer to the Ser-
vice and Maintenance Instructions for
further information.
• Examine the physical support of the
furnace. The support should be sound
with no cracks, sagging, gaps, etc.
around the base.
• Check furnace for any obvious signs
of deterioration.
BEFORE YOU
REQUEST A
SERVICE CALL
If your furnace is not operating or not
performing properly, you may save
the expense of a service call by check-
ing a few things yourself before calling
for service.
FOR INSUFFICIENT AIRFLOW:
• Check for dirty air filter(s).
• Check for blocked return-air or sup-
ply-air grilles throughout your home.
CAUTION
Do not use ethylene glycol
(Prestone II antifreeze coolant
or equivalent). Failure of plas-
tic components will occur.
!