Maximum Equivalent Vent Length - International comfort products G9MVE A3 Series Installation Instructions Manual

INSTALLATION INSTRUCTIONS
Table 14 MAXIMUM EQUIVALENT VENT LENGTH - Feet (Meters)
Note: Maximum Equivalent Vent Length (MEVL) does NOT include elbows or terminations
Use Table 15 − DEDUCTIONS FROM MEVL to determine allowable vent length for each application.
40,000
Outlet choke
Unit Size
required under
10 ft. TEVL
Pipe Dia. (in) 1 ½
0­2000 40 155
2001­3000 35 150
3001­4000 30 135
4001­4500 130
25
4501­5000 125
5001­6000 20 120
6001­7000 15 110
7001­8000 100
10
8001­9000
9001­10000 5
40,000
Outlet choke
Unit Size
required under 10
ft. TEVL
Pipe Dia.
38 51
(mm)
0­610 11 57
611­914 10 53
915­1219 9 49
1220­1370 47
8
1371­1524 45
1525­1829 6 41
1830­2134 5 37
2135­2438 33
3.5
2439­2743 30
2744­3048 1.5 26
Not all families have these models
*
Table 15 DEDUCTIONS FROM MAXIMUM EQUIVALENT VENT LENGTH - Feet (Meters)
Pipe Diameter (in):
Mitered 90º Elbow
Medium Radius 90º Elbow
Long Radius 90º Elbow
Mitered 45º Elbow
Medium Radius 45º Elbow
Long Radius 45º Elbow
Concentric Vent Termination
Standard Vent Termination
Figure 64 Elbows Configurations
LONG
MEDIUM
NOTES:
1. Use only the smallest diameter pipe possible for venting. Over−sizing may cause flame disturbance or excessive vent terminal
icing or freeze−up.
2. NA = Not allowed. Pressure switch will not close, or flame disturbance may result.
3. Total equivalent vent lengths under 10 ft. for 40k BTUH furnaces from 0 to 2000 ft (0 to 610m) above sea level require use of
an inducer outlet choke. Failure to use an outlet choke may result in flame disturbance or flame sense lock−out.
4. Not all furnace families include 140,000 BTUH input models.
5. Vent sizing for Canadian installation over 4500 ft. (1370 m) above sea level are subject to acceptance by local authorities having
jurisdiction.
6. Size both the combustion air and vent pipe independently, then use the larger size for both pipes.
7. Assume two 45° degree elbows equal one 90° degree elbow. Wide radius elbows are desirable and may be required in some
cases.
8. Elbow and pipe sections within the furnace casing and at the vent termination should not be included in vent length or elbow
count.
9. The minimum pipe length is 5 (1.5) linear feet (meters) for all applications.
10. Use 3−in (76 mm) diameter vent termination kit for installations requiring a 4−in (102 mm) diameter pipe.
440 01 4401 02
60,000
2 2 ½ 1 ½ 2 2 ½ 3
185 100 175 200
20
175 95 165 185
160 90 155 175
155 85 150 170
15
145 80 165
130 75 140 155
120 70 130 145
10
110 65 120 135
90 95 5 60 115 125
80 85 N/A 55 105 115
60,000
64 38 51 64 76 38
57 31 54 61 3
6.5
53 29 51 57
49 27 48 54
47 26 52 2
5 46
45 24 51
41 22 43 47
37 25 40 44
3
34 20 37 42
N/A
30 1.5 19 35 38
26 N/A 17 33 36
1­1/2
8 (2.4)
5 (1.5)
3 (0.9)
4 (1.2)
2.5 (0.8)
1.5 (0.5)
Tee 16 (4.9)
NA
0 (0.0)
MITERED
L11F082
Specifications subject to change without notice.
80,000
1 ½ 2 2 ½ 3 4 2
15 50 130 175 200 20
125 165 185
45 15
115 155 175
10 150 165
40 110
145 160
10
35 100 135 150
125 140
30 90
120 125
N/A
25 80 110 115 N/A
20 75 100 105
80,000 100,000
51 64 76 102 51 64
16 40 54 61 6 25
38 51 57 23
15 5
36 48 53
46 51 22
13 34
45 50 21
3
11 31 42 46
39 42 19
10 27
36 39 18
8 26 34 36 N/A 15
7 24 31 33 14
2 2­1/2
8 (2.4) 8 (2.4)
5 (1.5) 5 (1.5)
3 (0.9) 3 (0.9)
4 (1.2) 4 (1.2)
2.5 (0.8) 2.5 (0.8)
1.5 (0.5) 1.5 (0.5)
16 (4.9) 16 (4.9)
0 (0.0) NA
0 (0.0) 0 (0.0)
Figure 65 Vent Terminal Configurations
CONCENTRIC
Gas Furnace: (F/G)9MVE
100,000 120,000
2 ½ 3 4 2 ½ 3 4 2 ½
80 175 200 75 185
10
165 185 70 175
75
175 5 65 165
155
70 170
160
150 165 60
65
140 155 155 N/A
60 135 145 N/A 50 140
55 125 135 45 130
50 115 125 40 120
45 100 115 30 115
120,000
76 102 64 76 102 64
54 61 23 57 1.5
3
51 57 21 54
54 1.5 20 51
48
52
50
46 51 19
43 48 48 N/A
41 45 N/A 16 43
38 42 14 40
36 39 13 38
34 36 12 35
3
8 (2.4) 8
5 (1.5) 5
3 (0.9) 3
4 (1.2) 4
2.5 (0.8) 2.5
1.5 (0.5) 1.5
16 (4.9) 16
0 (0.0)
0 (0.0) 0
STANDARD 2−IN.,
3−IN. OR OPTIONAL
4−IN. TERMINATION
L11F083
140,000
3 4
5 65 155
140
60
120
50 110
45 100
35 80
30 65
25 45
15 30
10 15
140,000*
76 102
21 48
42
18
36
16 33
14 31
11 25
9 20
7 15
5 10
3.5 5
4
(2.4)
(1.5)
(0.9)
(1.2)
(0.8)
(0.5)
(4.9)
NA
(0.0)
A13110
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