915SB: Installation, Start-up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
42
Maximum Allowable Exposed Vent Length in Unconditioned Space (Metric)
Installing the Vent Pipe Adapter and Combustion Air
Pipe Adapter
NOTE:
The rubber coupling that attaches to the vent pipe adapter must
be used. The adapter seals the vent pipe to the casing and reduces the
strain on the vent elbow attached to the inducer.
1. Apply the gaskets to the vent pipe and combustion air pipe
adapters. If supplied, remove and discard round center “slug” from
.
A13074
Fig. 58 – Vent Coupling and Adapter with Gaskets
Unit Size
26,000* BTUH
Winter
Design
Temp
°C
Pipe Dia.
mm
0” Insulation
3/8” Insulation
1/2” Insulation
38
51
38
51
38
51
-7
6.1
6.1
15.2
13.7
18.3
15.2
-18
1.5
1.5
7.6
6.1
9.1
7.6
-29
4.6
3.0
6.1
4.6
-40
3.0
1.5
4.6
3.0
Winter
Design
Temp °C
Unit
Size
40,000* BTUH
60,000 BTUH
Uninsulated
3/8-in.
Insulation
1/2-in.
Insulation
Uninsulated
3/8-in. Insulation
1/2-in. Insulation
Pipe
Dia. mm 38
51
64 38
51
64 38
51
64
38
51
64 76
38
51
64 76
38 51
64 76
-7
6.1 6.1 6.1 6.1 15.2 13.7 6.1 18.3 15.2
6.1 9.1 9.1 7.6 6.1 22.9 19.8 18.3 6.1 25.9 22.9 19.8
-18
3.0 1.5 1.5 6.1 7.6 6.1 6.1 9.1 7.6
4.6 4.6 3.0 3.0 6.1 12.2 9.1 7.6 6.1 13.7 12.2 9.1
-29
1.5
6.1 4.6 3.0 6.1 6.1 4.6
3.0 1.5
6.1 7.6 6.1 4.6 6.1 9.1 7.6 6.1
-40
4.6 3.0 1.5 4.6 4.6 3.0
1.5
6.1 4.6 4.6 3.0 6.1 6.1 4.6 3.0
Winter
Design
Temp °C
Unit
Size
80,000 BTUH
Uninsulated
3/8-in. Insulation
1/2-in. Insulation
Pipe
Dia. mm
38
51
64
76
102
38
51
64
76
102
38
51
64
76
102
-7
4.6
12.2
12.2
10.7
9.1
4.6
15.2
27.4
22.9
19.8
4.6
15.2
21.3
21.3
21.3
-18
4.6
6.1
4.6
3.0
1.5
4.6
15.2
13.7
10.7
9.1
4.6
15.2
15.2
12.2
10.7
-29
4.6
3.0
1.5
4.6
10.7
9.1
6.1
4.6
4.6
12.2
9.1
7.6
4.6
-40
3.0
1.5
4.6
7.6
6.1
4.6
1.5
4.6
9.1
7.6
6.1
3.0
Winter
Design
Temp °C
Unit
Size
100,000 BTUH
Uninsulated
3/8-in. Insulation
1/2-in. Insulation
Pipe
Dia. mm
51
64
76
102
51
64
76
102
51
64
76
102
-7
6.1
15.2
12.2
10.7
6.1
24.4
28.9
24.4
6.1
24.4
32.0
27.4
-18
6.1
6.1
4.6
3.0
6.1
16.8
13.7
10.7
6.1
19.8
16.7
13.7
-29
4.6
3.0
1.5
6.1
10.7
9.1
6.1
6.1
13.7
10.7
7.6
-40
3.0
1.5
6.1
7.6
6.1
3.0
6.1
9.1
7.6
4.6
Winter
Design
Temp °C
Unit
Size
120,000 BTUH
140,000 BTUH
Uninsulated
3/8-in. Insulation
1/2-in. Insulation
Uninsulated
3/8-in. Insulation
1/2-in. Insulation
Pipe
Dia. mm
64
76
102
64
76
102
64
76
102
64
76
102
64
76
102
64
76
102
-7
3.0
15.2 12.2
3.0
22.9 28.9
3.0
22.9 32.0
1.5
16.7 15.2
1.5
19.8 32.0
1.5
19.8 38.1
-18
3.0
6.1
4.6
3.0
16.8 13.7
3.0
19.8 15.2
1.5
7.6
4.6
1.5
19.8 15.2
1.5
19.8 18.3
-29
3.0
3.0
3.0
10.7
7.6
3.0
13.7
9.1
1.5
3.0
1.5
1.5
13.7
9.1
1.5
15.2 12.2
-40
3.0
1.5
3.0
7.6
4.6
3.0
9.1
6.1
1.5
1.5
1.5
9.1
6.1
1.5
35
7.6
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury or death.
To route the vent pipe and combustion air pipe through the furnace, the
manufacturer supplied kit must be used. Failure to properly seal the
blower compartment from the furnace vestibule could result in the
circulation of carbon monoxide throughout the structure. The vent pipe
and combustion air pipe must be a continuous pipe while passing
through the blower compartment. Seals supplied in this kit must be
installed per the instructions provided. Follow all procedures outlined
in these instructions.
Attach gaskets to vent pipe and
combustion air adapters.
Vent Coupling and Adapter
