International comfort products A Series Installation Instructions Manual page 37

Installing the Vent Termination
Roof Terminations
A roof termination of any type will require a 4-in. (102 mm)
flashing for a 2 in. (50 mm ND) concentric vent or a 5- -in. diameter
(127 mm) flashing for a 3-in. (80 mm ND) concentric vent kit. For
two-pipe or single pipe vent systems, a flashing for each pipe of the
required diameter will be necessary.
It is recommended that the flashing be installed by a roofer or
competent professional prior to installing the concentric vent. The
terminations can be installed on a flat or pitched roof.
Concentric Vent
Single or multiple concentric vent must be installed (Fig. 56).
Maintain the required separation distance between vents or pairs of
vents (Fig. 56) and all clearance (Fig. 54).
NOTE: Follow the instructions of the vent terminal manufacturer.
These instructions are provided as a reference, only.
Cut one 4- -in. (102 mm) diameter hole for 2- -in. (50 mm ND) kit,
or one 5- -in. (127 mm) diameter hole for 3- -in. (80 mm ND) kit in
the desired location.
Loosely assemble concentric vent/combustion air termination
components together using instructions in kit.
Slide assembled kit with rain shield REMOVED through hole in
wall or roof flashing.
NOTE: Do not allow insulation or other materials to accumulate
inside of pipe assembly when installing it through hole.
Disassemble loose pipe fittings. Clean and cement using same
procedures as used for system piping. DO NOT CEMENT
POLYPROPYLENE FITTINGS.
Two- -Pipe and Single- -Pipe Terminations
Single and two pipe vent must be installed (Fig. 56 and Fig. 57).
Maintain the required separation distance between vents or pairs of
vents (Fig. 56 and Fig. 57) and all clearances (Fig. 54 and Fig. 55).
NOTICE
RECOMMENDED SUPPORT FOR VENT
TERMINATIONS
It is recommended that rooftop vent terminations in excess of
36 inches (1 M) in vertical length be supported by EITHER
the Direct Vent Termination Kit (Table 14) or by
field- -supplied brackets or supports fastened to the structure.
Cut the required number of holes in the roof or sidewall for vent
and (when used) combustion air pipes. Sidewall holes for two-pipe
vent terminations should be side-by-side, allowing space between
the pipes for the elbows to fit on the pipes.
Holes in the roof for direct- -vent two- -pipe terminations should be
spaced no more than 18 in. (457 mm) apart to help avoid vent gas
recirculation into combustion air intake.
Termination elbows will be installed after the vent and (if used)
combustion air pipe is installed.
Sidewall Terminations
Concentric Vent
NOTE: Follow the instructions of the vent terminal manufacturer.
These instructions are provided as a reference only.
Determine an appropriate location for termination kit using the
guidelines provided in section "Locating The Vent Termination" in
this instruction.
1. Cut one 4- -in. diameter hole for 2- -in. kit, or one 5- -in.
diameter hole for 3- -in. kit.
2. Loosely assemble concentric vent/combustion air termina-
tion components together using instructions in kit.
3. Slide assembled kit with rain shield REMOVED through
hole.
440 01 4601 01
NOTE: Do not allow insulation or other materials to accumulate
inside of pipe assembly when installing it through hole.
4. Locate assembly through sidewall with rain shield posi-
tioned no more than 1- -in. (25 mm) from wall (Fig. 56).
5. Disassemble loose pipe fittings. Clean and cement using
same procedures as used for system piping. DO NOT
CEMENT POLYPROPYLENE FITTINGS.
2-Pipe and 1-Pipe Vent Termination
NOTE: Follow the instructions of the vent terminal manufacturer.
These instructions are provided as a reference, only.
RECOMMENDED SUPPORT FOR VENT
TERMINATIONS
It is recommended that sidewall vent terminations in excess of
24 inches (0.6 M) in vertical length be supported by EITHER
the Direct Vent Termination Kit (Table 14) or by
field- -supplied brackets or supports fastened to the structure.
Determine an appropriate location for termination kit using the
guidelines provided in section "Locating The Vent Termination" in
this instruction.
1. Cut two holes, one for each pipe, of appropriate size for
pipe size being used.
2. Loosely install elbow in bracket (if used) and place as-
sembly on combustion- -air pipe.
3. Install bracket (Fig. 56).
NOTE: For applications using vent pipe option indicated by
dashed lines (Fig. 56 and Fig. 57), rotate vent elbow 90_ from
position.
4. Disassemble loose pipe fittings. Clean and cement using
same procedures as used for system piping. DO NOT
CEMENT POLYPROPYLENE FITTINGS.
(Direct Vent / 2-Pipe System ONLY)
When two or more furnaces are vented near each other, two vent
terminations may be installed (Fig. 56), but next vent termination,
or pair of vent terminations, must be at least 36 in. (914 mm) away
from the first two terminations. It is important that vent
terminations be made (Fig. 56) to avoid recirculation of vent gases.
Specifications subject to change without notice.
NOTICE
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