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

Table 8—Maximum Allowable Exposed Vent Pipe Length (ft) With and Without Insulation in Winter Design
FURNACE
SIZE
040
060
080
100
120
* Pipe length (ft) specified for maximum pipe lengths located in unconditioned spaces. Pipes located in unconditioned space cannot exceed total allowable pipe length
as specified in Table 8.
† Insulation thickness based on R value of 3.5 per in.

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. 34.)
3. Use wire ties to secure heat tape in place. Wire ties can be
positioned in notches of condensate trap sides. (See Fig. 34.)
Temperature Ambient*
WINTER DESIGN
TEMPERATURE
(°F)
20
0
-20
20
0
-20
20
0
-20
20
0
-20
20
0
-20
20
0
-20
20
0
-20
20
0
-20
20
0
-20
MAX PIPE
WITHOUT
DIAMETER
INSULATION
(IN.)
1.5
1.5
1.5
2
2
2
2
2
2
2
2
2
2.5
2.5
2.5
2.5
2.5
2.5
3
3
3
3
3
3
4
4
4
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.
30
WITH 3/8–IN. OR
THICKER INSULATION†
51
28
16
45
22
10
65
35
20
55
48
30
70
47
28
40
40
38
70
50
28
70
61
37
70
48
23
70
70
70
70
70
58
70
70
70
55
55
55
70
70
70
40
40
40
70
70
70
70
70
70
70
70
70