Bryant 350MAV Installation, Start-Up, And Operating Instructions Manual page 27

ALTITUDE (FT)
8001 to 9000‡
ALTITUDE (FT)
9001 to 10,000‡
Disk usage-Unless otherwise specified, use perforated disk assembly (factory-supplied in loose parts bag). If one disk is stated, separate 2 halves of perforated disk
assembly and use shouldered disk half. When using shouldered disk half, install screen side toward inlet box.
†Wide radius elbow.
‡Vent sizing for Canadian installations over 4500 ft (1370 m) above sea level are subject to acceptance by the local authorities having jurisdiction.
NA-Not Allowed; pressure switch will not make.
NOTES:
1. Do not use pipe size greater than those specified in table or incomplete combustion, flame disturbance, or flame sense lockout may occur.
2. Size both the combustion-air and vent pipe independently, then use the larger diameter for both pipes.
3. Assume two 45° elbows equal one 90° elbow. Long radius elbows are desirable and may be required in some cases.
4. Elbows and pipe sections within the furnace casing and at the vent termination should not be included in vent length or elbow count.
5. The minimum pipe length is 5 ft for all applications.
6. Use 3-in. diameter vent termination kit for installations requiring 4-in diameter pipe.
fully into inducer housing connection until it bottoms on
the internal stop. Tighten both clamps to secure the pipe
to inducer housing. Tighten the clamp screws to 15
in.-lb. of torque.
→
e. Install casing hole filler cap (factory-supplied in loose
parts bag) in unused combustion-air pipe casing hold.
WARNING: Vent pipe must be installed and fully
seated against inducer housing internal stop. Clamp must
be tightened to prevent any condensate leakage. Failure to
follow this warning could result in electrical shock, fire,
personal injury, or death.
NOTE: A 2-in. diameter pipe must be used within the furnace
casing. Make all pipe diameter transitions outside furnace casing.
VENT EXTENSION PIPE
Furnaces with 100,000 Btuh and larger inputs 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 down-
flow applications.
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.
3. Working from furnace to outside, cut pipe to required
length(s).
TABLE 6—MAXIMUM ALLOWABLE PIPE LENGTH (FT) (CONTINUED)
TERMINATION
UNIT SIZE
TYPE
040-08 2 Pipe or 2-in
040-12 Concentric
060-08
2 Pipe or 2-in
060-12
Concentric
060-16
080-12
2 Pipe or 2-in
080-16
Concentric
080-20
100-16 2 Pipe or 3-in
100-20 Concentric
2 Pipe or 3-in.
120-20
Concentric
140-20
TERMINATION
UNIT SIZE
TYPE
040-08 2 Pipe or 2-in
040-12 Concentric
060-08
2 Pipe or 2-in
060-12
Concentric
060-16
080-12
2 Pipe or 2-in
080-16
Concentric
080-20
100-16 2 Pipe or 3-in
100-20 Concentric
2 Pipe or 3-in.
120-20
Concentric
140-20
PIPE DIA
(IN.)*
1 2
1-1/2 46 41
2 62 60
1-1/2 11 6
2 49 44
2 33 28
2-1/2 62 60
2-1/2 23 15
3 59 54
3† no disk 10 NA
4† no disk 35 30
NA
PIPE DIA
(IN.)*
1 2
1-1/2 42 37
2 57 55
2 45 40
2 30 25
2-1/2 57 55
2-1/2 21 13
3 54 49
4† no disk 10 5
NA
4. Deburr inside and outside of pipe.
5. Chamfer outside edge of pipe for better distribution of
primer and cement.
6. Clean and dry all surfaces to be joined.
7. Check dry fit of pipe and mark insertion depth on pipe.
NOTE: It is recommended that all pipes be cut, prepared, and
preassembled before permanently cementing any joint.
8. After pipes have been cut and preassembled, apply gener-
ous 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.
9. While cement is still wet, twist pipe into socket with 1 /4
turn. Be sure pipe is fully inserted into fitting socket.
10. Wipe excess cement from joint. A continuous bead of
cement will be visible around perimeter of a properly made
joint.
—27—
NUMBER OF 90° ELBOWS
3 4 5
36 31 29
58 56 55
NA NA NA
42 37 35
17 12 10
58 56 55
7 5 NA
49 44 39
NA NA NA
25 20 15
NUMBER OF 90° ELBOWS
3 4 5
32 27 25
53 51 49
38 33 31
14 9 7
53 51 49
5 NA NA
44 39 34
NA NA NA
6
24
53
NA
34
NA
53
NA
34
NA
10
6
20
47
29
NA
47
NA
29
NA