Bryant 352MAV Installation, Start-Up, And Operating Instructions Manual page 27

ALTITUDE (FT) UNIT SIZE
036060
036080
048080
0 to 2000
048100
060100
060120
ALTITUDE (FT) UNIT SIZE
036060
036080
048080
2001 to 3000
048100
060100
060120
ALTITUDE (FT) UNIT SIZE
036060
036080
048080
3001 to 4000
048100
060100
060120
See notes at end of table.
a. Determine location of combustion-air intake pipe con-
nection to combustion-air intake housing as shown in
Fig. 34 for application.
b. Reposition combustion-air intake housing plug fitting in
appropriate unused intake housing connection.
c. If required, insert perforated disk assembly (factory-
supplied in loose parts bag) in intake housing where
combustion-air intake pipe will be connected. If half disk
set is required, install with shoulder of disk against stop
in combustion-air inlet.
d. Install pipe support (factory-supplied in loose parts bag)
into selected furnace casing combustion-air pipe hole.
Pipe support should be positioned at bottom of casing
hole.
e. Insert 2-in. diameter pipe into intake housing.
NOTE: A 2-in. diameter pipe must be used within the furnace
casing. Make all pipe diameter transitions outside furnace casing.
f. Install casing hole filler plug (factory-supplied in loose
parts bag) in unused combustion-air pipe casing hole.
g. Drill a 1/8-in. hole in 2-in. combustion-air pipe using
hole in intake housing as a guide.
h. Install a field-supplied No. 6 or No. 8 sheet metal screw
into combustion-air pipe.
NOTE: DO NOT OVERTIGHTEN SCREW. Breakage to intake
housing or fitting may cause air leakage to occur.
TABLE 7—MAXIMUM ALLOWABLE PIPE LENGTH (FT)
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.
Concentric
3† no disk
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
2 Pipe or 3-in.
3† no disk
Concentric
4† no disk
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
4† no disk
—27—
NUMBER OF 90° ELBOWS
1 2
20 15
2 70 70
10 NA
2 55 50
70 70
2 5 NA
40 30
3 70 70
10 NA
3† 45 40
70 70
NUMBER OF 90° ELBOWS
1 2
17 12
2 70 67
2 49 44
70 70
35 26
3 70 70
3 14 9
70 70
70 70
NUMBER OF 90° ELBOWS
1 2
16 11
2 68 63
2 46 41
70 70
33 24
3 70 70
65 58
70 70
NOTE: Do not attach combustion-air intake pipe permanently to
combustion-air intake housing since it may be necessary to remove
pipe for service of igniter or flame sensor.
Combustion-Air Intake Housing Plug Fitting: The combustion-
air intake plug fitting must be installed in unused combustion-air
intake housing. This fitting must be attached by using RTV
sealant, or by drilling a 1/8-in. hole in fitting, using hole in intake
housing as a guide. Install a field-supplied No. 6 or No. 8 sheet
metal screw.
A plugged drain connection has been provided on this fitting for
use when moisture is found in combustion-air intake pipe and
combustion box.
NOTE: Moisture in combustion-air intake may be result of
improper termination. Ensure combustion-air intake pipe termina-
tion is similar to that shown in Fig. 37, 38, 39, 40, and 41 so it will
not be susceptible to areas where light snow or other sources of
moisture could be pulled in.
If use of this drain connection is desired, drill out fitting's tap plug
with a 3/16-in. drill and connect a field-supplied 3/8-in. tube. This
tube should be routed to open condensate drain for furnace and
A/C (if used), and should be trapped. (See Fig. 36.)
2. Attach vent pipe to furnace as follows:
a. Determine location of vent pipe connection to inducer
housing as shown in Fig. 34 for application.
b. Reposition elastomeric (rubber) inducer housing outlet
cap and clamp to appropriate unused inducer housing
connection. Tighten clamp.
3 4 5
10 5 NA
70 70 70
NA NA NA
35 30 30
70 70 70
NA NA NA
20 20 10
70 70 70
NA NA NA
35 30 25
70 70 70
3 4 5
7 NA NA
66 61 61
30 25 25
70 70 70
16 16 6
70 70 66
NA NA NA
63 56 50
70 70 70
3 4 5
6 NA NA
62 57 57
28 23 22
70 70 70
15 14 5
70 66 61
51 44 38
70 70 70
6
NA
70
NA
20
70
NA
NA
70
NA
20
70
6
NA
61
15
70
NA
61
NA
43
70
6
NA
56
13
70
NA
56
31
70