Concentric Vent And Combustion-Air Termination Kit Installation - Bryant 352MAV Installation, Start-Up, And Operating Instructions Manual

ALTITUDE (FT) UNIT SIZE
036060
036080
048080
8001 to 9000‡
048100
060100
060120
ALTITUDE (FT) UNIT SIZE
036060
036080
048080
9001 to 10,000‡
048100
060100
060120
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, determine the smallest diameter allowed by the chart for each pipe, then use the larger of these two diameters
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.
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 downflow 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).
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.
TABLE 7—MAXIMUM ALLOWABLE PIPE LENGTH (FT) (CONTINUED)
TERMINATION
TYPE
2 Pipe or 2-in
Concentric
2 Pipe or 2-in
Concentric
2 Pipe or 3-in
Concentric
2 Pipe or 3-in.
Concentric
TERMINATION
TYPE
2 Pipe or 2-in
Concentric
2 Pipe or 2-in
Concentric
2 Pipe or 3-in
Concentric
2 Pipe or 3-in.
Concentric
PIPE DIA
(IN.)*
1 2
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
PIPE DIA
(IN.)*
1 2
2 45 40
2 30 25
2-1/2 57 55
2-1/2 21 13
3 54 49
4† no disk 10 5
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.
11. Handle pipe joints carefully until cement sets.
12. Support combustion-air and vent piping a minimum of
every 5 ft (3 ft for SDR-21 or -26 PVC) using perforated
metal hanging strap.
13. Slope combustion-air and vent pipes toward furnace a
minimum of 1/4 in. per linear ft with no sags between
hangers.
14. Use appropriate methods to seal openings where vent and
combustion-air pipes pass through roof or side wall.
C. Concentric Vent and Combustion-Air Termination
Kit Installation
NOTE: If these instructions differ from those packaged with
termination kit, follow kit instructions.
Combustion-air and vent pipes must terminate outside structure. A
factory accessory termination kit must be installed in 1 of the
installations shown in Fig. 37, 38, 39, 40, and 41. Four termination
kits are available.
1. The 2-in. termination bracket kit is for 1-in., 1-1/2 in., and
2-in. diameter 2-pipe termination systems.
2. The 3-in. termination bracket kit is for 2-1/2 in., 3-in., and
4-in. diameter 2-pipe termination systems.
3. The 2-in. concentric vent/air termination kit is for 1-in.,
1-1/2 in., 2-in., and 2-1/2 in. diameter pipe systems when
single penetration of wall or roof is desired.
4. The 3-in. concentric vent/air termination kit is for 2-1/2 in.,
3-in., and 4-in. diameter pipe systems when single penetra-
tion of wall or roof is desired.
—29—
NUMBER OF 90° ELBOWS
3 4 5
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
38 33 31
14 9 7
53 51 49
5 NA NA
44 39 34
NA NA NA
6
NA
34
NA
53
NA
34
NA
10
6
29
NA
47
NA
29
NA