International comfort products C9MVX Installation Instructions Manual page 30

Joining Pipe and Fittings
SEE VENT AND COMBUSTION AIR PIPING,
Combustion Air Piping Guidelines in this manual for applicable
ASTM Standards for vent materials.
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in
personal injury or death.
Do NOT use solvent cement that has become
curdled, lumpy or thickened and do NOT thin.
Observe precautions printed on containers. For
applications below 32°F(0°C), use only low
temperature type solvent cement. Poor joints may
lead to disconnected or leaking vent pipe joints
allowing carbon monoxide to enter the living space.
1. Cut pipe end square, remove ragged edges and burrs.
Chamfer end of pipe, then clean fitting, socket and pipe joint
of all dirt, grease, or moisture.
NOTE: Stir the solvent cement frequently while using. Use a
natural bristle brush or the dauber supplied with the cement. The
proper brush size is one inch.
2. After checking pipe and socket for proper fit, wipe socket
and pipe with cleaner-primer. Apply a liberal coat of primer
to inside surface of socket and outside of pipe. Do NOT
allow primer to dry before applying cement.
3. Apply a thin coat of cement evenly in the socket. Quickly
apply a heavy coat of cement to the pipe end and insert pipe
into fittings with a slight twisting movement until it bottoms
out.
NOTE: Cement MUST be fluid while inserting pipe. If NOT, recoat
pipe.
4. Hold the pipe in the fitting for 30 seconds to prevent the
tapered socket from pushing the pipe out of the fitting.
5. Wipe all excess cement from the joint with a rag. Allow 15
minutes before handling. Cure time varies according to fit,
temperature and humidity.
Connecting Vent Pipes and Termination
NOTE: Combustion air intake and vent MUST terminate in the
same atmospheric pressure zone. If installation is in a cold climate
(sustained temperatures 0°F (−17°C) and below for 24 or more
consecutive hours), increase the minimum distance between vent
pipe and air intake from 8" (203.2mm) to 18"(457.2mm).
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in
personal injury or death.
Maintain a minimum of 36" (914.4mm) between
combustion air inlet and clothes dryer vent.
Terminate the combustion air intake as far as
possible from any air conditioner, heat pump,
swimming pool, swimming pool pumping,
chlorinator or filtration unit.
30
1. Install all couplings, nipples and elbows using proper
procedures for Joining Pipe and Fittings and maintain
Vent and
spacing between vent and combustion air piping as
indicated in Figure 22 through Figure 30.
Figure 22
8" (203.2mm)* MIN.
20' (6.1m) MAX
Horizontal Termination
1. Cut two holes. 2
(76.2mm) for 2
(76.2mm) pipe. Do NOT make the holes oversized, or it will
be necessary to add a sheet metal or plywood plate on the
outside with the correct size hole in it.
2. Check hole sizes by making sure it is smaller than the
couplings or elbows that will be installed on the outside. The
couplings or elbows MUST prevent the pipe from being
pushed back through the wall.
3. Extend vent pipe and combustion air pipe through the wall
3
/
4
and wall.
4. Install the couplings, nipple and termination elbows as
shown and maintain spacing between vent and combustion
air piping as indicated in Figure 22 and Figure 23.
A metal shield is recommended 18" x 18" (457.2mm x 457.2mm)
min. or 18" (457.2mm) min. diameter around the vent termination
at the exterior wall to protect the house exterior materials from flue
product or condensation (freezing) damage.
Using Exterior Risers
1. Install elbows and pipe to form riser as shown in Figure 23.
2. Secure vent pipe to wall with galvanized strap or other rust
resistant material to restrain pipe from moving.
3. Insulate pipe with Armaflex or equivalent moisture resistant
closed cell foam insulation or Fiberglass insulation if boxed
in and sealed against moisture.
Vertical Termination
1. Figure 25 shows the proper installation and clearances for
vertical vent termination. The vertical roof termination
should be sealed with a plumbing roof boot or equivalent
flashing. The inlet of the intake pipe and end of the exhaust
vent must be terminated no less than 12" (307.8mm) above
the roof or snow accumulation level, and 12" (307.8mm)
away from a vertical wall or other protrusion.
Specifications are subject to change without notice.
Sidewall Termination 12" (304.8mm) or
More Above Snow Level or Grade Level
8" (203.2mm) MIN.
12 " (304.8mm) MIN.
GRADE LEVEL
OR
SNOW LEVEL
1
/ " (63.5mm) for 2" (50.mm) pipe, 3"
2
1
/ " (63.5mm) pipe, or 3
2
" (19.1mm) to 1" (25.4mm) and seal area between pipe
*18, (457.2mm) Minimum for
cold climates [sustained 0_F
(-17_C) and below for 24 or
more consecutive hours]
25-00-05F
1
/ " (88.9mm) for 3"
2
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