Carrier Gas 58MSA - Manual (Page 9)

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HEADING SOUTH FOR THE WINTER?
DON’T FORGET YOUR FURNACE!
Since the furnace uses a condensing heat exchanger, some water
will accumulate in the unit as a result of the heat 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. Follow 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. 16.)
3. Remove main furnace door. (See Fig. 18.)
4. Remove upper right inducer housing drain connection
cap. (See Fig. 29.)
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5. Connect field-supplied 1/2-in. ID tube to upper inducer
housing drain connection.
6. Insert field-supplied funnel into tube.
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. 30.)
8. Remove funnel and tube from inducer housing and
replace drain connection cap and clamp.
9. Replace main furnace door. (See Fig. 25.)
10. Propylene glycol need not be removed before restarting
furnace.
A CHECK-UP CHECKLIST
Your furnace represents an important investment in your fami-
ly’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 professional check-up annually.
The following checklist can be used as a guideline to proper
service:
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• Inspect all flue gas passages, burners, heat exchangers, cou-
pling box(es), and inducer assembly.
• Inspect all combustion-air and vent piping inside structure
and vent pipe termination 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 additional lubrication. These motors can be identified
by the absence of oil ports on each end of the motor.
• Inspect and change or clean air filters(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 connections(s) at the furnace to en-
sure it is physically sound, sealed to the furnace casing, and
terminates outside the space containing the furnace.
CAUTION
If the furnace is installed in an unconditioned space
where the ambient temperatures may be 32°F or
lower, freeze protection measures must be taken.
CAUTION
Do not use ethylene glycol (Prestone II antifreeze
coolant or equivalent). Failure of plastic compo-
nents will occur.
!
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