Operating instructions

or equivalent 3 to 6 watt per ft at 120–v and 40°F self-regulating,
shielded, and waterproof heat tape. See Installation Instructions
supplied with accessory or heat tape manufacturer’s recommenda-
tions.
1. Fold heat tape in half and wrap on itself 3 times.
2. Locate heat tape between sides of condensate trap back.
(See Fig. 47.)
3. Use wire ties to secure heat tape in place. Wire ties can be
positioned in notches of condensate trap sides. (See Fig.
47.)
4. Wrap field drain pipe with remaining heat tape, approxi-
mately 1 wrap per ft.
5. When using field-supplied heat tape, follow heat tape
manufacturer’s instructions for all other installation guide-
lines.
XI. SEQUENCE OF OPERATION
CAUTION: Furnace control must be grounded for
proper operation, or control will lock out. Control is
grounded through green wire routed to gas valve and
burner box screw. Failure to follow this caution will
result in intermittent unit operation.
Using schematic diagram, follow sequence of operation through
different modes. (See Fig. 30.) Read and follow wiring diagram
carefully.
NOTE: If a power interruption occurs during a call for heat (W),
the control will start a 90-second blower-only ON period two
seconds after power is restored, if the thermostat is still calling for
Fig. 43—Concentric Vent and Combustion-Air
Side Termination (Dimension “A” is Touching or 2-in.
Maximum Separation)
A93057
COMBUSTION AIR
VENT
A
VENT
1″ MAXIMUM
(TYP)
Fig. 44—Sidewall Termination of 12 in. of Less
(Dimension “A” is Touching or 2-in. Maximum
Separation)
A96129
A
COMBUSTION AIR
COMBUSTION AIR
VENT
Fig. 45—Sidewall Termination of More than 12 in.
(Dimension “A” is Touching or 2-in. Maximum
Separation)
A96130
COMBUSTION AIR
C
OMBUSTION AIR
VENT
A
Fig. 46—Example of Field Drain Attachment
A94054
OPEN STAND
PIPE FOR
A/C OR
HUMIDIFIER
DRAIN
TEE
TO OPEN
DRAIN
—34—
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