Carrier 58ZAV - Manual (Page 7)

7. Reinstall the clean filter with the cross-mesh binding side
facing the furnace blower.
8. Put filter retainer back in the bracket opening and lock it
in place.
9. Replace blower and control access doors and turn ON elec­
trical power to your furnace. (See Fig. 14,16, and 23.)
NOTE: For upflow models only—if side return ducts are used,
2 filters may be required in some models. The procedure listed
above may be used to remove side filters.
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• DOWNFLOW/HORIZONTAL FURNACES ONLY:
Two 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. 24.)
1. Tbrn OFF electrical supply to the furnace. (See Fig. 19.)
2. Remove blower access doors after removing 2 screws.
3. Remove the left side filter by tipping the filter toward the
center—raise it from the V-shaped channel in which it
rests. (See Fig. 24 and 25.)
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4. Lower filter down along side of the blower and remove from
the furnace.
5. To remove the second filter, lift from V-shaped channel
and remove the same way as left side filter.
6. Inspect the filter. If torn, replace the filter.
7. 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.
8. Reinstall the 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) 16 X 25 X 1* (1) 16x25x1 Cleanable
21 (1) 16 X 25 X 1 (1) 20 X 25 X 1* Cleanable
24-1/2 (2) 16 X 25 X 1* (2) 12 X 25 X 1 Cleanable
DOWNFLOW/HORIZONTAL
FURNACE FILTER TABLE
FURNACE
CASING WIDTH FILTER SIZE FILTER TYPE
14-3/16 (2) 14 X 20 X 1* Cleanable
17-1/2 (2) 14 X 20 X 1* Cleanable
21 (2) 16 X 20 X 1* Cleanable
24-1/2 (2) 16 X 20 X 1* Cleanable
*Factory provided with the furnace. Filters may be field
modified by cutting and folding the frame as indicated on
the filter. Alternate sizes and additional filters may be or­
dered 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 can cause faulty firing. This “delayed ignition” is
characterized by an alarmingly loud sound. If your furnace
makes a loud noise when the main burners are ignited, shut
down the furnace—call your servicing dealer.
Use your flashlight and follow these steps for inspecting the
combustion area and vent system of your furnace:
1. Tirn off the electrical supply to the furnace and remove
the access doors. (See Fig. 9 and 10, or 11.)
2. Carefully inspect the gas burner (see Fig. 26) for dirt, rust,
or scale. Then, inspect the relief box, flue connection area,
and the vent pipe for rust.
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 rusty joints or
seams, or signs of water leakages are found call your dealer
for service.
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