Carrier 58MTA - Manual (Page 10)

10
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. 20.)
3. Remove main furnace door. (See Fig. 23.)
4. Remove upper inducer housing drain connection cap.
(See Fig. 40.)
40
41
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. 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 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:
• 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 ter-
minates outside the space containing the furnace.
• Inspect electrical wiring, connections, 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 assem-
bly for leaks. The condensate removal system should be cleaned
annually by a qualified service agency. Refer to the Service and
Maintenance Instructions for further information.
• Examine the physical support of the furnace. Support should
be sound with not 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 checking a few
things yourself before calling for service.
FOR INSUFFICIENT AIRFLOW:
• Check for dirty air filter(s).
• Check for blocked return-air or supply-air grilles throughout
your home. Ensure they are open and unobstructed.
If problem still exists, call your dealer for service.
IF FURNACE FAILS TO OPERATE:
Follow this checklist step by step, advancing to the next step
only if furnace fails to start.
• Check thermostat for proper temperature. Is thermostat set
above room temperature?
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 to
prevent minor property or product damage.
CAUTION
Do not use ethylene glycol (Prestone II antifreeze
coolant or equivalent). Failure of plastic compo-
nents will occur.
!
!