Carrier 58MTB Installation, Start-Up, And Operating Instructions Manual page 37

TABLE 12—MAXIMUM ALLOWABLE PIPE LENGTH (FT) (Continued)
UNIT MAX
ALTITUDE (FT) INPUT RATE
(BTUH)
60,000
80,000
4001 to 5000‡
100,000
120,000
UNIT MAX
ALTITUDE (FT) INPUT RATE
(BTUH)
60,000
80,000
5001 to 6000‡
100,000
120,000
UNIT MAX
ALTITUDE (FT) INPUT RATE
(BTUH)
60,000
80,000
6001 to 7000‡
100,000
120,000
See notes at end of table
5. Clean and dry all surfaces to be joined.
6. Check dry fit of pipe and mark insertion depth on pipe.
7. After pipes have been cut and preassembled, apply generous
layer of cement primer to pipe fitting socket and end of pipe
to insertion mark. Quickly apply approved cement to end of
pipe and fitting socket (over primer). Apply cement in a light,
uniform coat on inside of socket to prevent buildup of excess
cement. Apply second coat.
8. While cement is still wet, twist pipe into socket with 1/4 turn.
Be sure pipe is fully inserted into fitting socket.
9. Wipe excess cement from joint. A continuous bead of cement
will be visible around perimeter of a properly made joint.
10. Handle pipe joints carefully until cement sets.
DIRECT VENT (2-PIPE) ONLY
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.
NA
Concentric
4† no disk
DIRECT VENT (2-PIPE) ONLY
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.
NA
Concentric
4† no disk
DIRECT VENT (2-PIPE) ONLY
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.
NA
Concentric
4† no disk
37
NON-DIRECT VENT
NUMBER OF 90° ELBOWS
(1-PIPE) ONLY
PIPE DIA
1
(IN.)*
1-1/2 15
2 64
2 44
2-1/2 70
2-1/2 31
3 70
NA 53
3† 56
4† no disk 70
NON-DIRECT VENT
NUMBER OF 90° ELBOWS
(1-PIPE) ONLY
PIPE DIA
1
(IN.)*
1-1/2 14
2 60
2 41
2-1/2 70
2-1/2 29
3 70
NA 42
3† 53
4† no disk 70
NON-DIRECT VENT
NUMBER OF 90° ELBOWS
(1-PIPE) ONLY
PIPE DIA
1
(IN)*
1-1/2 13
2 57
2 38
2-1/2 70
2-1/2 27
3 68
NA 31
3† 49
4† no disk 70
11. Horizontal portions of the venting system shall be supportive
to prevent sagging support. Support combustion air piping (if
applicable) and vent piping a minimum of every 5 ft (3 ft for
SDR-21 or -26 PVC) using perforated metal hanging strap.
12. Slope combustion air piping (if applicable) and vent piping
downward towards furnace a minimum of 1/4 in. per linear ft
with no sags between hangers.
13. Horizontal portions of the venting system shall be installed so
as to prevent the accumulation of condensate.
14. Use appropriate methods to seal openings where combustion
air pipe (if applicable) and vent pipe pass through roof or
sidewall.
2 3 4 5 6
10 5 NA NA NA
59 58 53 52 52
39 26 21 20 11
70 70 70 70 70
22 13 12 NA NA
70 67 62 57 52
46 40 33 26 20
55 54 53 52 52
70 70 70 70 70
2 3 4 5 6
9 NA NA NA NA
55 54 49 48 47
36 23 18 17 8
70 70 70 70 70
21 12 11 NA NA
67 62 57 52 47
35 29 22 15 9
52 50 49 48 47
70 70 70 70 70
2 3 4 5 6
8 NA NA NA NA
52 50 45 44 43
33 21 16 15 6
70 68 67 66 64
19 10 9 NA NA
63 58 53 48 43
24 18 11 NA NA
48 47 45 44 43
70 70 70 67 62