FURNACE AIR FILTER
TABLE
AIR FILTER LOCATED IN BLOWER COMPARTMENT
FURNACE | FILTER SIZE |
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(IN.) |
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CASING |
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WIDTH | *Side |
| Bottom |
| FILTER | |
(IN.) | Return† |
| Return |
| TYPE | |
(1) 16 x |
| (1) 16 x |
| Cleanable | ||
| 25 x 1* |
| 25 x 1* |
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21 | (1) 16 x |
| (1) 20 x |
| Cleanable | |
| 25 x 1 |
| 25 x 1* |
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(1 or 2) 16 |
| (1) 24 x |
| Cleanable | ||
| x 25 x 1 |
| 25 x 1* |
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AIR FILTER LOCATED IN FILTER CABINET: | ||||||
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FILTER |
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CABINET |
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HEIGHT | FILTER SIZE |
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(IN) | (IN.) |
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| FILTER TYPE | ||
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16 | (1) 16 x 25 x 1* |
| Cleanable or | |||
| or (1) 16 x 25 x |
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| Disposable | ||
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20 | (1) 20 x 25 x 1* |
| Cleanable or | |||
| or (1) 20 x 25 x |
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| Disposable | ||
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24 | (1) 24 x 25 x 1* |
| Cleanable or | |||
| or (1) 24 x 25 x |
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| Disposable | ||
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*
†Upflow only.
!CAUTION
Use care when cutting support rods in filters to protect against flying pieces and sharp rod ends. Wear safety glasses, gloves, and appropri- ate protective clothing. Failure to follow this caution could re- sult in personal injury.
COMBUSTION AREA AND VENT SYSTEM
Visually inspect the combustion area and vent system before each heating season. Make sure that all PVC pipes leading into the combustion area and vent are free from any cracks and sags.
!DANGER
If holes are found in the pipes or if any portion has become disconnected, toxic fumes can escape into your home.
DO NOT OPERATE YOUR FURNACE. Call your dealer for service. Failure to follow this warning could result in per- sonal injury or death.
Also check the
When dirt, soot, scale, or rust is allowed to build up, your furnace can suffer a loss of efficiency and perform improperly. Accumulations on the main burners can result in firing out of normal sequence. This delayed igni- tion creates an alarmingly loud sound.
!CAUTION
If your furnace makes an espe- cially loud noise when the main burners light, shut down your furnace and call your dealer. Failure to follow this caution would result in minor property damage.
To inspect the combustion area and vent system, you will need a flashlight. Refer to Fig. 3 or 4, and proceed as follows:
1.Turn off gas and electrical supplies to the furnace and remove
the main furnace door. (See Fig. 9, 10, and 11.)
2.Remove burner enclosure front. (See Fig. 37 or 38.)
Inspect the gas burners, igniter
area, and remainder of furnace for dirt, rust, soot, or scale.
!CAUTION
If dirt, rust, soot, or scale accu- mulations are found, call your dealer. Do not operate your furnace. Failure to follow this caution would result in minor property or product damage.
3.Inspect the
UPFLOW |
37
DOWNFLOW |
38
4.Reinstall burner enclosure front.
5.If your furnace is free of the above conditions, replace main furnace door and turn on electrical and gas supplies to your furnace.
(See Fig. 16, 17, and 18.)
6.Start the furnace and observe its operation. Watch the burner flames to see if they are clear blue, almost transparent. (See Fig. 39.) If you observe a suspected malfunction, or the burner flames are not clear blue, call your dealer.
39
HEADING SOUTH FOR THE WINTER?
DON’T FORGET YOUR
FURNACE!
!CAUTION
If the furnace is installed in an unconditioned space where the ambient temperatures may be 32°F or lower, freeze protec- tion measures must be taken to prevent minor property or product damage.
Since the furnace uses a condensing heat exchanger, some water will accu- mulate in the unit as a result of the heat
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