Bryant 352MAV Installation, Start-Up, And Operating Instructions Manual page 31

TABLE 8—MAXIMUM ALLOWABLE EXPOSED VENT PIPE LENGTH (FT) WITH AND WITHOUT INSULATIONIN WINTER
WINTER DESIGN
UNIT
TEMPERATURE
SIZE
060
080
100
120
* Pipe length (ft) specified for maximum pipe lengths located in unconditioned spaces. Pipes located in unconditioned space cannot exceed total allowable pipe length as
specified in Table 7.
† Insulation thickness based on R value of 3.5 per in.
TWO-PIPE TERMINATION KIT
1. Determine location for termination. Consideration of the
following should be made when determining an appropriate
location for termination kit.
a. Comply with all clearance requirements as stated in
Table 6.
b. Termination kit should be positioned where vent vapors
will not damage plants/shrubs or air conditioning equip-
ment.
c. Termination kit should be positioned so that it will not be
affected by wind eddy (such as inside building corners)
or allow recirculation of flue gases, airborne leaves, or
light snow.
d. Termination kit should be positioned where it will not be
damaged by or subjected to foreign objects, such as
stones, balls, etc.
e. Termination kit should be positioned where vent vapors
are not objectionable.
2. Cut 2 holes, 1 for each pipe, of appropriate size for pipe size
being used.
3. Loosely install elbow in bracket and place assembly on
combustion-air pipe.
Roof terminations-Loosely install pipe coupling on prop-
erly cut vent pipe. Coupling must be positioned so bracket
will mount as shown in Fig. 37. For applications using
combustion-air pipe option, indicated by dashed lines in
Fig. 37, install 90° street elbow into 90° elbow, making
U-fitting. A 180° U-fitting may be used.
Sidewall terminations-Install bracket as shown in Fig. 40
or 41.
For applications using vent pipe option indicated by dashed
lines in Fig. 40, rotate vent elbow 90° from position shown
in Fig. 40.
4. Disassemble loose pipe fittings. Clean and cement using
same procedures as used for system piping.
DESIGN TEMPERATURE AMBIENT*
MAX PIPE
DIAMETER
(°F) (IN.)
20 2
0 2
-20 2
20 2
0 2
-20 2
20 2.5
0 2.5
-20 2.5
20 2.5
0 2.5
-20 2.5
20 3
0 3
-20 3
20 3
0 3
-20 3
20 4
0 4
-20 4
WITHOUT
INSULATION
44
21
20
55
30
16
58
29
14
40
38
21
63
30
12
70
38
19
65
26
5
32°F MINIMUM INSTALLED
AMBIENT OR FREEZE
PROTECTION REQUIRED
Fig. 42—Freeze Protection
5. Check required dimensions as shown in Fig. 37, 40, or 41.
CONCENTRIC VENT/AIR TERMINATION KIT
1. Determine location for termination. Consideration of the
following should be made when determining an appropriate
location for termination kit.
a. Comply with all clearance requirements as stated in
Table 6.
b. Termination kit should be positioned where vent vapors
will not damage plants/shrubs or air conditioning equip-
ment.
—31—
WITH 3/8–IN. OR
THICKER INSULATION†
70
70
57
55
55
55
70
70
67
40
40
40
70
70
70
70
70
70
70
70
65
A93058