Step 8—Checking Heat Tape Operation (If Applicable)
If this furnace is to be operated in an unconditioned space
where the ambient temperatures may be 32°F or lower, freeze
protection measures must be taken. (See Fig. 13.) See
CONDENSATE DRAIN PROTECTION section of Installa-
tion, Start-Up, and Operating Instructions.
In applications where the ambient temperature around the furnace
is 32°F or lower, freeze protection measures are required. If heat
tape has been applied, check to ensure it will operate when low
temperatures are present.
NOTE: Heat tape, when used, should be wrapped around the
condensate drain trap and drain line. There is no need to use heat
tape within the furnace casing. Most heat tapes are temperature
activated, and it is not practical to verify the actual heating of the
tape. Check the following:
1. Check for signs of physical damage to heat tape such as nicks,
cuts, abrasions, gnawing by animals, etc.
2. Check for discolored heat tape insulation. If any damage or
discolored insulation is evident, replace heat tape.
3. Check that heat tape power supply circuit is on.
Step 9—Winterizing
Freezing condensate left in the furnace will damage the
equipment.
If the furnace will be off for an extended period of time in a
structure where the temperature will drop to 32°F or below,
winterize as follows:
1. Turn off electrical supply to furnace.
2. Remove main furnace door.
3. Disconnect cap from unused drain tap on inducer housing.
(See Fig. 13.)
4. Connect field-supplied 1/2-in. I.D. tube to upper inducer
housing drain connection.
Do not use ethylene glycol (Prestone II antifreeze/coolant or
equivalent automotive type). Failure of plastic components
will occur.
5. Insert funnel in tube and pour up to 1 quart antifreeze,
propylene glycol (RV, swimming pool antifreeze, or equiva-
lent) into funnel until it is visible at point where condensate
enters open drain. (See Fig. 14.)
A93058
32°F MINIMUM INSTALLED
AMBIENT OR FREEZE
PROTECTION REQUIRED
Fig. 13—Winterizing the Furnace
A99118
Fig. 14—Inducer Housing Drain Cap
A99119
Fig. 15—Funnel in Drain and Antifreeze Running
Through Trap
10
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