See Fig. 46 for example of possible field drain attachment using
1/2-in. CPVC or PVC tee for vent and A/C or humidifier drain
connection.
Outdoor draining of the furnace is permissible if allowed by local
codes. Caution should be taken when freezing ambient may freeze
drain pipe and prohibit draining.
PERSONAL INJURY HAZARD
Caution should be taken to prevent draining where slippery
conditions could cause personal injuries.
Excessive condensate draining may cause saturated soil
conditions which could result in damage to plants.
CONDENSATE DRAIN PROTECTION
Freezing condensate left in condensate trap and drain line may
cause cracks, and possible water damage may occur. If freeze
protection is required, use condensate freeze protection accessory
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, approximately
1 wrap per ft.
5. When using field-supplied heat tape, follow heat tape manu-
facturer’s instructions for all other installation guidelines.
START-UP, ADJUSTMENTS, AND SAFETY CHECK
Step 1—General
1. Furnace must have a 115-v power supply properly connected
and grounded.
NOTE: Proper polarity must be maintained for 115-v wiring. If
polarity is incorrect, control LED status indicator will flash rapidly
and furnace will not operate.
2. Thermostat wire connections at terminals R, W, G, and Y/Y2
must be made at 24-v terminal block on furnace control.
3. Natural gas service pressure must not exceed 0.5 psig (14-in.
wc), and be no less than 0.16 psig (4.5-in. wc).
4. Blower access panel must be in place to complete 115-v
electrical circuit to furnace.
Fig. 41—Rooftop Termination (Dimension “A” is Touching or 2-in. Maximum Separation)
A96128
A
Fig. 42—Concentric Vent and Combustion-Air Roof
Termination (Dimension “A” is Touching or
2-in. Maximum Separation)
A93056
COMBUSTION
AIR
VENT
VENT
A
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)
35
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