Carrier 58MTB Installation, Start-Up, And Operating Instructions Manual page 36

UNIT MAX
ALTITUDE (FT) INPUT RATE
(BTUH)
60,000
80,000
0 to 2000
100,000
120,000
UNIT MAX
ALTITUDE (FT) INPUT RATE
(BTUH)
60,000
80,000
2001 to 3000
100,000
120,000
UNIT MAX
ALTITUDE (FT) INPUT RATE
(BTUH)
60,000
80,000
3001 to 4000
100,000
120,000
See notes at end of table
UNIT DAMAGE HAZARD
Failure to follow this caution may result in unit component
damage.
Vent pipe must be installed and fully seated against inducer
housing internal stop. Clamp must be tightened to prevent any
condensate leakage.
6. Install casing hole filler cap (factory-supplied in loose parts
bag) in unused vent pipe casing hole.
Attachment of Vent Extension Pipe
Furnaces with 100,000 Btuh and larger input are supplied with a
PVC vent extension pipe (2-in. diameter by 12-in. long). This pipe
has a built-in channel to assist vent condensate disposal. When this
vent extension pipe is supplied, it MUST be used to connect the
field vent pipe to furnace inducer housing on ALL upflow and
downflow applications.
TABLE 12—MAXIMUM ALLOWABLE PIPE LENGTH (FT)
DIRECT VENT (2-PIPE) ONLY
TERMINATION PIPE DIA
TYPE (IN.)*
1-1/2
2 Pipe or 2-in
Concentric
1-1/2
2 Pipe or 2-in
Concentric
2-1/2
2 Pipe or 3-in
2-1/2
Concentric
2-1/2 one disk
2 Pipe or 3-in.
3†
Concentric
3† no disk
DIRECT VENT (2-PIPE) ONLY
TERMINATION PIPE DIA
TYPE (IN.)*
1-1/2
2 Pipe or 2-in
Concentric
2 Pipe or 2-in
Concentric
2-1/2
2-1/2
2 Pipe or 3-in
Concentric
NA
2 Pipe or 3-in.
Concentric
3† no disk
4† no disk
DIRECT VENT (2-PIPE) ONLY
TERMINATION PIPE DIA
TYPE (IN)*
1-1/2
2 Pipe or 2-in
Concentric
2 Pipe or 2-in
Concentric
2-1/2
2-1/2
2 Pipe or 3-in
Concentric
3† no disk
2 Pipe or 3-in.
Concentric
NA
4† no disk 4† no disk
NON-DIRECT VENT
(1-PIPE) ONLY
PIPE DIA
(IN.)*
1-1/2
2 2
1-1/2
2 2
2-1/2
2 2
2-1/2
3 3
2-1/2
NA
3†
NON-DIRECT VENT
(1-PIPE) ONLY
PIPE DIA
(IN.)*
1-1/2
2 2
2 2
2-1/2
2-1/2
3 3
3 NA
3†
NA
4† no disk
NON-DIRECT VENT
(1-PIPE) ONLY
PIPE DIA
(IN.)*
1-1/2
2 2
2 2
2-1/2
2-1/2
3 3
NA
3†
4† no disk
NOTE: See label on vent extension pipe for proper installation.
This pipe may be shortened if an elbow is used to connect vent
extension tube to field-installed vent pipe.
Installation Guidelines for Combustion Air Pipe and Vent Pipe
It is recommended that all pipes be cut, prepared, and pre-
assembled before permanently cementing any joint.
1. Attach combustion air pipe and vent pipe per instructions in
sections "Combustion Air Pipe" and "Vent Pipe."
2. Working from furnace to outside, cut pipe to required
length(s).
3. Deburr inside and outside of pipe.
4. Chamfer outside edge of pipe for better distribution of primer
and cement.
36
NUMBER OF 90° ELBOWS
1 2 3 4 5
20 15 10 5 NA
70 70 70 70 70
10 NA NA NA NA
55 50 35 30 30
70 70 70 70 70
5 NA NA NA NA
40 30 20 20 10
70 70 70 70 70
10 NA NA NA NA
45 40 35 30 25
70 70 70 70 70
NUMBER OF 90° ELBOWS
1 2 3 4 5
17 12 7 NA NA
70 67 66 61 61
49 44 30 25 25
70 70 70 70 70
35 26 16 16 6
70 70 70 70 66
14 9 NA NA NA
63 62 62 61 61
70 70 63 56 50
70 70 70 70 70
NUMBER OF 90° ELBOWS
1 2 3 4 5
16 11 6 NA NA
68 63 62 57 57
46 41 28 23 22
70 70 70 70 70
33 24 15 14 5
70 70 70 66 61
65 58 51 44 38
59 59 58 57 57
70 70 70 70 70
6
NA
70
NA
20
70
NA
NA
70
NA
20
70
6
NA
61
15
70
NA
61
NA
61
43
70
6
NA
56
13
70
NA
56
31
56
70