Carrier 58RAP - Manual (Page 9)

5. Inspect the filter. If tom, replace the filter.
6. Wash the filter (if dirty) in a sink, bathtub, or outside with
a garden hose. Always use cold tap water. A mild liquid de­
tergent may be used if necessary. Spray water through the
filter in the opposite direction of airflow (through the
cross-mesh binding side). Allow filter to dry.
7. Reinstall the clean filter with its cross-mesh binding side
facing the furnace blower.
8. Put filter retainer back in the bracket opening and lock it
in place.
9. Replace the blower and control access doors and turn ON
electrical power to your furnace. (See Fig. 15,16, and 21.)
NOTE: If side return ducts are used, two filters may be required
in some models. The procedure listed above may be used to re­
move side filters.
• DOWNFLOW FURNACES ONLY:
TVo filters are located in the return-air plenum above the
blower (above line-of-sight) resting in the V-shaped channel on
top of the furnace. (See Fig. 22.)
1. lUrn OFF electrical supply to the furnace. (See Fig. 18.)
2. Remove blower access door after removing 2 screws.
3. Remove left side filter by tipping the filter top toward the
center—^raise it firom the V-shapped channel in which it
rests. (See Fig. 22 and 23.)
A91410
22
A91411
23
4. Lower filter down along side of the blower and remove from
the furnace.
5. Tb remove the second filter, lift from V-shaped channel
and remove the same way as left side filter.
6. Inspect the filters. If tom, replace the filter.
7. Wash the filters (if dirty) in a sink, bathtub, or outside
with a garden hose. Always use cold tap water. A mild liq­
uid detergent may be used if necessary. Spray water
through the filter in the opposite direction of airflow
through the cross-mesh binding side. Allow filter to dry.
8. Reinstall clean filters with the cross-mesh binding side
facing the furnace blower.
9. Replace blower door (secure with 2 screws) and turn ON
electrical power to your furnace.
UPFLOW FURNACE FILTER TABLE
FURNACE
CASING
FILTER SIZE
WIDTH Side Return Bottom Return FILTER TYPE
14-3/16 (1) 16x25x1* (1) 14x25x1 Cleanable
17-1/2 (1)16x25x1* (1) 16x25x1 Cleanable
21 (1) 16 X 25 X 1 (1) 20 X 25 X 1* Cleanable
24-1/2 (2) 16 X 26 X 1 (1) 24 X 25 X 1* Cleanable
DOWNFLOW FURNACE FILTER TABLE
FURNACE
CASING WIDTH
FILTER
SIZE
FILTER
TYPE
14-3/16 (2) 16 X 20 X 1* Cleanable
17-1/2 (2) 16 X 20 X 1* Cleanable
21 (2) 16x20x1* Cleanable
24-1/2 (2) 16 X 20 X 1* Cleanable
* Factory provided with the furnace. Filter may be field modified
by cutting as required. Alternate sizes and additional filters
may be ordered from your dealer.
COMBUSTION AREA AND VENT SYSTEM
Inspect the combustion area and vent system before each heat­
ing season. An accumulation of dirt, soot, or rust can mean a
loss of efficiency and improper performance. Buildups on the
main burners or pilot assembly can cause faulty firing. This
“delayed ignition” is characterized by an alarmingly loud
sound. If your furnace makes a loud noise when the main burn­
ers are ignited by the pilot, shut down the furnace—call your
servicing dealer. Refer to the lighting instructions label on the
blower door for shutdown procedures.
Use your flashlight and follow these steps for inspecting the
combustion area and vent system of your furnace:
1. Thm off the electrical supply to the furnace and remove
the access doors. (See Fig. 8 and 9, or 10.)
2. Carefully inspect the gas burner (see Fig. 24) for dirt, rust,
or scale. Then, inspect the relief box, flue connection area,
and the vent pipe for mst.
NOTE: If dirt, rust, soot, or scale accumulations are found, call
your servicing dealer. DO NOT OPERATE THE FURNACE.
3. Inspect the vent pipe for a sag, holes, or a disconnection. A
horizontal vent pipe must slope upward. If msty joints or
seams, or signs of water leakages are found call your dealer
for service.