Carrier 58MTA Installation, Start-Up, And Operating Instructions Manual page 31

TABLE 7—MAXIMUM ALLOWABLE PIPE LENGTH (FT) (Continued)
ALTITUDE (FT) UNIT SIZE
060-12
080-12
080-16
4001 to 5000‡
100-16
100-20
120-20
ALTITUDE (FT) UNIT SIZE
060-12
080-12
080-16
5001 to 6000‡
100-16
100-20
120-20
ALTITUDE (FT) UNIT SIZE
060-12
080-12
080-16
6001 to 7000‡
100-16
100-20
120-20
ALTITUDE (FT) UNIT SIZE
060-12
080-12
080-16
7001 to 8000‡
100-16
100-20
120-20
See notes at end of table.
Extended Exposed Sidewall Pipes
Sidewall combustion-air and vent pipe terminations may be
extended beyond area shown in Fig. 40 or 41 in outside ambient by
insulating pipes as indicated in Table 8.
1. Determine combustion-air and vent pipe diameters, as stated
above, using total pipe length and number of elbows.
2. Using winter design temperature (used in load calculations),
find appropriate temperature for your application and furnace
model.
3. Determine required insulation thickness for exposed pipe
lengths.
NOTE: Pipe length(ft) specified for maximum pipe lengths lo-
cated in unconditioned spaces. Pipes located in unconditioned
space cannot exceed total allowable pipe length as specified in
Table 7.
Two-Pipe Termination Kit
1. Determine location for termination. Consider the following
when determining an appropriate location for termination kit.
TERMINATION PIPE DIA
TYPE (IN.)*
1-1/2
2 Pipe or 2-in
Concentric
2
2
2 Pipe or 2-in
Concentric
2-1/2
2-1/2
2 Pipe or 3-in
Concentric
3
3† no disk
2 Pipe or 3-in.
Concentric
4† no disk
TERMINATION PIPE DIA
TYPE (IN.)*
1-1/2
2 Pipe or 2-in
Concentric
2
2
2 Pipe or 2-in
Concentric
2-1/2
2-1/2
2 Pipe or 3-in
Concentric
3
3† no disk
2 Pipe or 3-in.
Concentric
4† no disk
TERMINATION PIPE DIA
TYPE (IN.)*
1-1/2
2 Pipe or 2-in
Concentric
2
2
2 Pipe or 2-in
Concentric
2-1/2
2-1/2
2 Pipe or 3-in
Concentric
3
3† no disk
2 Pipe or 3-in.
Concentric
4† no disk
TERMINATION PIPE DIA
TYPE (IN.)*
1-1/2
2 Pipe or 2-in
Concentric
2
2
2 Pipe or 2-in
Concentric
2-1/2
2-1/2
2 Pipe or 3-in
Concentric
3
3† no disk
2 Pipe or 3-in.
Concentric
4† no disk
31
NUMBER OF 90° ELBOWS
1 2 3
15 10 5
64 59 58
44 39 26
70 70 70
31 22 13
70 70 67
53 46 40
70 70 70
NUMBER OF 90° ELBOWS
1 2 3
14 9 NA
60 55 54
41 36 23
70 70 70
29 21 12
70 67 62
42 35 29
70 70 70
NUMBER OF 90° ELBOWS
1 2 3
13 8 NA
57 52 50
38 33 21
70 70 68
27 19 10
68 63 58
31 24 18
70 70 70
NUMBER OF 90° ELBOWS
1 2 3
12 7 NA
53 48 46
36 31 19
66 65 63
25 17 8
63 58 53
20 13 7
61 56 51
a. Comply with all clearance requirements as stated in Table
6.
b. Termination kit should be positioned where vent vapors
will not damage plants/shrubs or air conditioning equip-
ment.
c. Termination kit should be positioned so that it will not be
affected by wind eddy (such as inside building corners) or
allow recirculation of flue gases, airborne leaves, or light
snow.
d. Termination kit should be positioned where it will not be
damaged by or subjected to foreign objects, such as stones,
balls, etc.
e. Termination kit should be positioned where vent vapors are
not objectionable.
2. Cut 2 holes, 1 for each pipe, of appropriate size for pipe size
being used.
3. Loosely install elbow in bracket and place assembly on
combustion-air pipe.
4 5 6
NA NA NA
53 52 52
21 20 11
70 70 70
12 NA NA
62 57 52
33 26 20
70 70 70
4 5 6
NA NA NA
49 48 47
18 17 8
70 70 70
11 NA NA
57 52 47
22 15 9
70 70 70
4 5 6
NA NA NA
45 44 43
16 15 6
67 66 64
9 NA NA
53 48 43
11 NA NA
70 67 62
4 5 6
NA NA NA
41 40 38
14 12 NA
62 60 59
7 NA NA
48 43 38
NA NA NA
46 41 36