Combustion Area And Vent System; A Check-Up Checklist - Carrier 58EFB User's Information Manual

8. Reinstall the clean filter with the cross-mesh binding side
facing the furnace blower.
9. Replace blower door, reinstall 4 screws (see Fig. 18), and
turn on electrical power to your furnace.

COMBUSTION AREA AND VENT SYSTEM

Visually inspect the combustion area and vent system before
each heating season. Make sure that the pipe leading into the
vent is free from any cracks and sags. Also check the vent pipe
on the outside of your home for blockage.
When dirt, soot, or rust is allowed to build up, your furnace can
suffer a loss of efficiency and perform improperly. Accumula-
tions on the main burners can result in their firing out of normal
sequence. This delayed ignition will create an alarmingly loud
sound.
CAUTION
!
If your furnace makes an especially loud noise when
the main burners light, shut down your furnace and
call your dealer.
To inspect the combustion area and vent system, you will need
a flashlight. Refer to Fig. 2 and proceed as follows:
1. Turn off the electrical supply to your furnace. (See Fig. 14.)
2. Remove burner enclosure front.
Inspect the gas burners for dirt, rust, soot, or scale. (See Fig. 19.)
Then inspect the vent outlet area and vent pipe.
CAUTION
!
If dirt, rust, soot, or scale accumulations are found,
call your dealer. Do not operate your furnace.
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3. Inspect the vent pipe for sags, holes, cracks, or disconnec-
tions. Any horizontal vent pipe must slope upward, away
from the furnace. If rusty joints or seams, or signs of water
leakage are found, call your dealer for service.
If holes are found in the vent pipe, or if it has become
disconnected, toxic fumes can escape into your
home. DO NOT OPERATE YOUR FURNACE. Call
your dealer for service.
4. Reinstall the burner enclosure front.
5. If your furnace is free of the above conditions, restore elec-
trical power to your furnace. (See Fig. 11.)
6. Start your furnace and observe its operation. Watch the
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burner flames to see if they are clear blue, almost transpar-
ent. (See Fig. 20.) If you observe a suspected malfunction,
or the burner flames are not clear blue, call your dealer.

A CHECK-UP CHECKLIST

Your furnace represents an important investment in your fam-
ily's comfort and your home's value. To keep it in tip-top shape
and as a preventative to 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, and
inducer assembly.
•
Inspect all combustion and ventilation air passages and open-
ings, including vent pipe terminations outside the structure.
•
Check gas pipes leading to and inside of your furnace for
leaks.
•
Inspect, clean, and lubricate the blower motor and wheel as
required.
NOTE: If oil ports are provided, refer to the unit Service and
Maintenance Instructions for blower motor oiling information.
The motor must be oiled by a qualified service technician.
•
Inspect and change or clean air filter(s) if necessary.
•
Inspect all supply- and return-air ducts for obstructions, air
leaks, and insulation. Remedy any problem when necessary.
•
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.
7
19
DANGER
!
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