29
440 01 1051 02
Specifications are subject to change without notice.
Figure 21
Proper Sealing Procedure for
Combustion Blower
Rubber Coupling
& Clamps
90
Elbow
Combustion
Blower
Vent Fitting
& Clamps
25-24-14a
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
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 tempera-
ture 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
and
below for 24 or more consecutive hours
), increase the minimum distance
between vent pipe and air intake from 8
″
to 18
″
.
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, chlori-
nator or filtration unit.
!
WARNING
1. Install all couplings, nipples and elbows using proper
procedures for
Joining Pipe and Fittings
and maintain
spacing between vent and combustion air piping as
indicated in
Figure 22
through
Figure 24
.
8” 203.2mm* MIN.
20’(6.1m) MAX
8” (203.2mm)
MIN.
Figure 22
Sidewall Termination 12
″
(304.8mm) or
More Above Snow Level or Grade Level
*18
(457.2mm) Minimum for
cold climates (sustained tem
peratures 0
F(-17
C) and below
for 24 or more consecutive
hours)
25-00-05F
GRADE LEVEL
OR
SNOW LEVEL
12 ”
(304.8mm)
MIN.
EXHAUST
INLET
Horizontal Termination
1. Cut two holes. 2
1
/
2
″
(63.5mm) for 2
″
(50.mm) pipe, 3
″
(76.2mm) for 2
1
/
2
″
(63.5mm) pipe, or 3
1
/
2
″
(88.9mm) for 3
″
(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.
