Operating instructions

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. 36.
For applications using combustion-air pipe option, indi-
cated by dashed lines in Fig. 36, 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. 39
or 40.
For applications using vent pipe option indicated by dashed
lines in Fig. 39, rotate vent elbow 90° from position shown
in Fig. 39.
4. Disassemble loose pipe fittings. Clean and cement using
same procedures as used for system piping.
5. Check required dimensions as shown in Fig. 36, 39, or 40.
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 5.
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 it will not be
affected by wind eddy (such as inside building comers)
or that may 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 one 4-in. diameter hole for 2-in. kit, or one 5-in.
diameter hole for 3-in. kit.
3. Loosely assemble concentric vent/air termination compo-
nents together using instructions in kit.
4. Slide assembled kit with rain shield REMOVED through
hole.
NOTE: Do not allow insulation or other materials to accumulate
inside of pipe assembly when installing it through hole.
Roof terminations—Locate assembly through roof to appropriate
height as shown in Fig. 37.
Sidewall terminations—Locate assembly through sidewall with
rain shield positioned no more than 1-in. from wall as shown in
Fig. 38.
5. Disassemble loose pipe fittings. Clean and cement using
same procedures as used for system piping.
6. Check required dimensions as shown in Fig. 37 or 38.
D. Multiventing and Vent Terminations
When 2 or more 350MAV Furnaces are vented near each other,
each furnace must be individually vented. NEVER common vent
or breach vent 350MAV furnaces. When 2 or more 350MAV
furnaces are vented near each other, 2 vent terminations may be
installed as shown in Fig. 41, 42, 43, 44, and 45, but next vent
Fig. 36—Roof Termination (Preferred)
A87224
18″ MAXIMUM
COMBUSTION
AIR
COUPLING
ROOF
VENT
BRACKET
VERTICAL SEPARATION
BETWEEN COMBUSTION
AIR AND VENT
8
3
/
4
″ FOR 3″ KIT
6
3
/
4
″ FOR 2″ KIT
MAINTAIN 12 IN. MINIMUM
CLEARANCE ABOVE HIGHEST
ANTICIPATED SNOW LEVEL.
MAXIMUM OF 24 IN. ABOVE ROOF.
Fig. 37—Concentric Vent and Combustion-Air Roof
Termination (Preferred)
A93054
COMBUSTION
AIR
MAINTAIN 12 IN.
(18 IN. FOR CANADA)
MINIMUM CLEARANCE
ABOVE HIGHEST
ANTICIPATED SNOW
LEVEL. MAXIMUM OF
24 IN. ABOVE ROOF.
VENT
—31—