With power to the unit disconnected, check all electrical connec-
tions for tightness. Tighten all screws on electrical connections. If
any smoky or burned connections are found, disassemble the
connection, clean all parts, strip wire, and reassemble properly and
securely.
Reconnect electrical supply to unit and observe unit through 1
complete operating cycle for proper operation.
Step 8—Checking Heat Tape Operation (If Applicable)
UNIT AND PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in furnace compo-
nent failures or water property damage.
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
UNIT DAMAGE HAZARD
Failure to follow this caution may result in furnace compo-
nent damage.
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.
UNIT DAMAGE HAZARD
Failure of plastic components may occur.
Do not use ethylene glycol (Prestone II antifreeze/coolant or
equivalent automotive type).
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.)
6. Reconnect drain cap to inducer housing.
7. Replace main furnace door.
8. Propylene glycol need not be removed before restarting
furnace.
WIRING DIAGRAM
See Fig. 16 for Wiring Diagram.
TROUBLESHOOTING
Use the Troubleshooting Guide, the status code LED on the
cotntrol and the Component Test to isolate furnace operation
problems.
STATUS CODES
For an explanation of status codes, refer to service label located on
back of main furnace door or Fig. 17 and the Troubleshooting
Guide. The stored status code will NOT be erased from the control
memory if 115- or 24-v power is interrupted.
NOTE: Removing the blower access door will open the blower
access door switch and terminate 115-v power to the control.
To read current status code, remove main furnace door. The status
code LED can be viewed through the sight glass on the blower
access door.
NOTE: NO thermostat signals may be present at control and all
blower off delays must be completed to view previous codes.
Fig. 10—Gasket on Collector Box
A93081
RTV
PAM
9
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