32°F MINIMUM INSTALLED AMBIENT OR FREEZE PROTECTION REQUIRED
A93058
If this furnace is installed in an unconditioned space where the ambient temperatures may be 32°F or lower, freeze protection measures must be taken.
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 10ÐWinterizing
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 drain tube from inducer housing. (See Fig. 13.)
4.Insert funnel in drain tube and pour antifreeze, propylene glycol (RV, swimming pool antifreeze, or equivalent) into furnace until it is visible at point where condensate enters open drain. (See Fig. 14.)
5.Reconnect drain tube to inducer housing.
6.Replace main furnace door.
Do not use ethylene glycol (Prestone II antifreeze/coolant or equivalent automotive type). Failure of plastic components will occur.
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