28
Rubber Coupling
& Clamps
90
°
Elbow
Combustion
Blower
Vent Fitting
& Clamps
Vent Extension
Pipe (Side Panel
Exit)
Vent Pipe
(Top Panel Exit)
Vent Pipe
Rotate downward
5
°
to 10
°
NOTE:
Built--in channel will be angled 5
°
to 10
°
also.
SIDE VIEW
NOTE:
The 90
°
elbow is approved
for use inside the furnace ONLY.
Tee
A07714
Fig. 20 -- Proper Sealing Procedure for Combustion Blower
Joining Pipe and Fittings
SEE VENT AND COMBUSTION AIR PIPING, vent and
Combustion Air Piping Guidelines
in this manual for applicable
ASTM Standards for vent materials.
FIRE HAZARD
Failure to follow this warning could result in personal injury,
death, and/or property damage.
Observe all cautions and warnings printed on material
containers.
Provide adequate ventilation and do NOT assemble near heat
source or open flame. Do NOT smoke while using solvent
cements and avoid contact with skin or eyes.
!
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.
!
WARNING
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
(Direct Vent)
NOTE
: For direct vent applications, combustion air intake and
vent
MUST
terminate in the same atmospheric pressure zone. If
installation is in a cold climate (sustained temperatures 0
°
F
(--18
°
C)and below for 24 or more consecutive hours), increase
the minimum distance between vent pipe and air intake from 8
″
to 18
″
(203 to 457 mm).
1. Install all couplings, nipples and elbows using proper pro-
cedures for
Joining Pipe and Fittings
and maintain spa-
cing between vent and combustion air piping as indicated
in Fig. 21 through Fig. 23.
8” 203.2mm* MIN.
20’(6.1m) MAX
8” (203.2mm)
MIN.
*18 in. (457.2mm) Minimum for
cold climates (sustained tem-
peratures 0
°
F(- 17
°
C) and below
for 24 or more consecutive
hours)
GRADE LEVEL
OR
12 ”
(304.8mm)
MIN.
EXHAUST
INLET
A07715
Fig. 21 -- Sidewall Termination 12” (305 mm) or More Above
Snow Level or Grade Level
Horizontal Termination
1. Cut two holes. 2--
1
/
2
″
(64 mm) for 2
″
(51 mm) pipe, 3
″
(76
mm) for 2--
1
/
2
″
(64 mm) pipe, or 3
1
/
2
″
(89 mm) for 3
″
(76
mm) 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 be-
ing pushed back through the wall.
3. Extend vent pipe and combustion air pipe through the wall
3
/
4
″
(19 mm) to 1
″
(25 mm) and seal area between pipe
and wall.
4. Install the couplings, nipple and termination elbows as
shown and maintain spacing between vent and combustion
air piping as indicated in Fig. 21 and Fig. 22.
A metal shield is recommended 18
″
x 18
″
(457 mm x 457 mm)
min. or 18
″
(457 mm) min. diameter around the vent termination
at the exterior wall to protect the house exterior materials from
flue product or condensation (freezing) damage.
359AA
V
