Condensate Drain Protection; Start-Up, Adjustments And Safety Check; General - Carrier 58MVB Installation, Start-Up, And Operating Instructions Manual

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DIRECT VENT (2-PIPE) TERMINATION KIT
2-in. Concentric Vent Kit
3-in. Concentric Vent Kit
2-in. Termination Bracket Kit
3-in. Termination Bracket Kit
connections (furnace, A/C, or humidifier) must be terminated into
an open or vented drain as close to the respective equipment as
possible to prevent siphoning of the equipment's drain.
See Fig. 45 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
Failure to follow this warning could result in property damage
and personal injury or death.
Caution should be taken to prevent draining where slippery
conditions may cause personal injuries. Excessive condensate
draining may cause saturated soil conditions which may 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 120v 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. 46.)
3. Use wire ties to secure heat tape in place. Wire ties can be
positioned in notches of condensate trap sides. (See Fig. 46.)
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 status indicator light flashes rapidly
and furnace does not operate.
2. Thermostat wire connections at terminals R, W/W1, 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), but must 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.
Table 12—Vent Termination Kit for Direct Vent/2-Pipe System
TERMINATION SYSTEM
Single Penetration of Wall or Roof
Single Penetration of Wall or Roof
2-Pipe Termination System
2-Pipe Termination System
DIAM. OF COMBUSTION AIR AND VENT
PIPES (IN INCHES)
1, 1-1/2, 2, or 2-1/2
2-1/2, 3 or 4
1, 1-1/2 or 2
2-1/2, 3 or 4
OPEN STAND
PIPE FOR
A/C OR
HUMIDIFIER
DRAIN
TEE
TO OPEN
DRAIN
Fig. 45—Example of Field Drain Attachment
CONDENSATE TRAP
WIRE TIE(S)
HEAT TAPE
(3 WRAPS MINIMUM)
Fig. 46—Condensate Trap Heat Tape
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