Bryant 987MB Installation, Start-Up, Operating And Service And Maintenance Instructions page 46

987MB: Installation, Start-up, Operating and Service and Maintenance Instructions
Maximum Allowable Exposed Vent Length in Unconditioned Space - Ft.
Unit Size
Uninsulated
Winter
Pipe Dia.
1 ½
Design Temp
in.
°F
20 20
0 10
-20 5
-40
Unit Size
Winter
Pipe Dia. in.
Design
20
Temp
0
°F
-20
-40
Unit Size
Winter
Pipe Dia. in.
Design
20
Temp °F
0
-20
-40
Unit Size
Winter
Pipe Dia. in. 2 ½
Design
20 10
Temp °F
0 10
-20 10
-40 10
Maximum Allowable Exposed Vent Length in Unconditioned Space - Meters
Unit
Size
Uninsulated
Pipe
Winter
38
Design
Dia. mm
Temp °C
-7 6.1
-18 3.0
-29 1.5
-40
Unit Size
Winter
Pipe Dia. mm
Design
-7
Temp °C
-18
-29
-40
Unit Size
Winter
Pipe Dia. mm
Design
-7
Temp °C
-18
-29
-40
Unit Size
Winter
Pipe Dia. mm
Design
-7
Temp °C
-18
-29
-40
* Pipe length (ft) specified for maximum pipe lengths located in unconditioned spaces. Pipes located in unconditioned space cannot exceed total allowable pipe length calculated from
† Insulation thickness based on R value of 3.5 per in.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 13 – Maximum Allowable Exposed Vent Lengths Insulation Table
40,000* BTUH
3/8-in.
Insulation
2 2 ½ 1 ½ 2 2 ½ 1 ½
20 20 20 50 45
5 5 20 25 20
20 15 10
15 10 5
Uninsulated
1 ½ 2 2 ½ 3
15 40 40 35
15 20 15 10
15 10 5
10 5
Uninsulated
2 2 ½ 3
20 50 40
20 20 15
15 10 5
10 5
120,000 BTUH
Uninsulated 3/8-in. Insulation 1/2-in. Insulation
3 4 2 ½ 3
50 40 10 75
20 15 10 55
10 35
10
5 10 25
40,000* BTUH
3/8-in.
Insulation
51 64 38 51 64 38
6.1 6.1 6.1 15.2 13.7 6.1 18.3 15.2
1.5 1.5 6.1 7.6 6.1 6.1
6.1 4.6 3.0 6.1
4.6 3.0 1.5 4.6
Uninsulated
38 51 64 76
4.6 12.2 12.2 10.7
4.6 6.1 4.6 3.0
4.6 3.0 1.5
3.0 1.5
Uninsulated
51 64 76
6.1 15.2 12.2
6.1 6.1 4.6
4.6 3.0 1.5
3.0 1.5
120,000 BTUH
Uninsulated 3/8-in. Insulation 1/2-in. Insulation
64 76 102 64 76
3.0 15.2 12.2 3.0 22.9 28.9
3.0 6.1 4.6 3.0 16.8 13.7
3.0 3.0 3.0 10.7
3.0 1.5 3.0 7.6
1/2-in.
Uninsulated
Insulation
2 2 ½ 1 ½ 2 2 ½
20 60 50 20 30
20 30 25 15 15
20 20 15 10 5
15 15 10 5
80,000 BTUH
3/8-in. Insulation
4 1 ½ 2 2 ½
30 15 50 90
5 15 50 45
15 35 30
15 25 20
100,000 BTUH
3/8-in. Insulation
4 2 2 ½
35 20 80 95
10 20 55 45
20 35 30
20 25 20
Uninsulated
4 2 ½ 3 4 2 ½
95 10 75 105 5
45 10 65 50 5
25 10 45 30 5
15 10 30 20 5
1/2-in.
Uninsulated
Insulation
51 64 38 51 64
6.1 9.1 9.1
9.1 7.6 4.6 4.6 3.0
6.1 4.6 3.0 1.5
4.6 3.0 1.5
80,000 BTUH
3/8-in. Insulation
102 38 51 64
9.1 4.6 15.2 27.4
1.5 4.6 15.2 13.7
4.6 10.7 9.1
4.6 7.6 6.1
100,000 BTUH
3/8-in. Insulation
102 51 64
10.7 6.1 24.4
3.0 6.1 16.8
6.1 10.7
6.1 7.6
102 64 76 102 64
3.0 22.9 32.0 1.5
3.0 19.8 15.2 1.5
7.6 3.0 13.7 9.1 1.5
4.6 3.0 9.1 6.1 1.5
46
60,000 BTUH
3/8-in. Insulation
3 1 ½ 2 2 ½ 3
30 25 20 75 65 60
10 10 20 40 30 25
20 25 20 15
20 15 15 10
1/2-in. Insulation
3 4 1 ½ 2
75 65 15 50
35 30 15 50
20 15 15 40
15 5 15 30
1/2-in. Insulation
3 4 2 2 ½
80 20 80
35 20 65
20 20 45
10 20 30
140,000 BTUH
3/8-in. Insulation
3 4 2 ½ 3
55 50 5 65 105
25 15 5 65
10 5 5 45
5 5 30
60,000 BTUH
3/8-in. Insulation
76 38 51 64 76
7.6 6.1 22.9 19.8 18.3 6.1 25.9 22.9 19.8
3.0 6.1 12.2 9.1 7.6
6.1 7.6 6.1 4.6
6.1 4.6 4.6 3.0
1/2-in. Insulation
76 102 38 51
22.9 19.8 4.6 15.2
10.7 9.1 4.6 15.2
6.1 4.6 4.6 12.2
4.6 1.5 4.6 9.1
1/2-in. Insulation
76 102 51 64
28.9 24.4 6.1 24.4
13.7 10.7 6.1 19.8
9.1 6.1 6.1 13.7
6.1 3.0 6.1 9.1
140,000 BTUH
Uninsulated 3/8-in. Insulation
76 102 64 76
16.7 15.2 1.5 19.8 32.0
7.6 4.6 1.5 19.8 15.2
3.0 1.5 1.5 13.7
1.5 1.5 9.1
1/2-in. Insulation
1 ½ 2 2 ½ 3
20 85 75 65
20 45 40 30
20 30 25 20
20 20 15 10
2 ½ 3 4
70 70 70
50 40 35
30 25 15
25 20 10
3 4
105 90
55 45
35 25
25 15
1/2-in. Insulation
4 2 ½ 3 4
5 65 125
50 5 65 60
30 5 50 40
20 5 35 25
1/2-in. Insulation
38 51 64 76
6.1 13.7 12.2 9.1
6.1 9.1 7.6 6.1
6.1 6.1 4.6 3.0
64 76 102
21.3 21.3 21.3
15.2 12.2 10.7
9.1 7.6 4.6
7.6 6.1 3.0
76 102
32.0 27.4
16.7 13.7
10.7 7.6
7.6 4.6
1/2-in. Insulation
102 64 76 102
1.5 19.8 38.1
1.5 19.8 18.3
9.1 1.5 15.2 12.2
6.1 1.5 35 7.6
Table 11.