ConnectingVentand CombustionAir Piping
Poison carbon monoxide gas hazard.
Cement or mechanically seal all joints, fittings,
etc. to prevent leakage of flue gases.
Failure to properly seal vent piping can result in
death, personal injury and/or property damage.
Refer to the Figure 8 through Figure 15 that corresponds to the
installation position of the furnace for the application.
Preassemble the vent and combustion air piping from the furnace
to the vent termination. Do not cement the pipe joints until the pipe
preassembly process is complete.
CombustionAir Pipe Connection (Dual Certified or
Direct Vent)
install the air intake coupling and gasket to the furnace with the
four(4) screws. (See Figure 8 through Figure 15)
Note: For the upflow and horizontal installations, the air intake
coupling and gasket must be installed to the top panel of the fur-
nace.
For downflowinstallation, the air intake coupling and gasket must
be installed to the alternate air intake location on either the left or
right side panels. Remove the 3" hole plug from the side panel
and relocate to the air intake hole in the top panel. Use the four
screws to seal the four(4) mounting holes in the top panel next to
the hole plug. Drill four(4) 7/64" diameter holes in the casing using
the air intake coupling as the template.
The air intake coupling is sized for 2" PVC pipe.
install the combustion air pipe to the air intake coupling using RTV
sealant to provide for future serviceability.
Vent Pipe Connection
install the vent pipe grommet to the furnace panel. Locate the
grommet in the furnace panel at a location directly away from the
vent fitting on the combustion blower. The grommet snaps into the
3" hole plug from the furnace panel. NOTE: Depending on the
installation position, the vent pipe grommet will be installed to the
top panel or to the alternate location on the side panels. If needed,
remove the 3" hole plug from the furnace panel and relocate to the
open hole in the furnace panel. See Figure 8 through Figure 15.
The vent pipe grommet is sized for 2" PVC pipe.
install the vent pipe to the vent fitting on the combustion blower
using the clamp.
Note: The vent fitting MUST be installed with the air flow
marking arrow pointed toward the vent pipe. (See Figure 16)
Some installations require the vent fitting to be installed with
a 20 to 30 ° downward slope. (See Figures 8 - 15)
Vent Fitting
& Clamps
Proper Sealing Procedure for
Combustion Blower
Vent Pipe (Top panel exit)
Rubber Coupling & Clamps
Combustion
Blower
Vent
(Sidepanelexit)
DRAIN SIDE VIEW
Joining Pipe and Fittings
Fire hazard.
25-23-35
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.
Observe all cautions and warnings printed on
material containers to prevent possible death,
personal injury and/or property damage.
This furnace is approved for venting with Schedule 40 PVC,
CPVC, ABS, Cellular Core pipe fittings and SDR-26 PVC.
NOTE: All PVC, CPVC, ABS, and Cellular Core pipe fittings, sol-
vent cement, primers and procedures MUST conform to Ameri-
can National Standard Institute and American Society for Testing
and Materials (ANSl/ASTM) standards.
• Pipe and Fittings - ASTM D1785, D2241, D2466,
D2661, D2665, F-891, F-628
• PVC Primer and Solvent Cement - ASTM D2564
• Procedure for Cementing Joints - Ref ASTM D2855
NOTE: In order to create a seal that allows future removal of pipe,
RTV sealant MUST be used on the inlet pipe where it joins to
the furnace. PVC, CPVC, ABS, and Cellular Core pipe and ce-
ment may be used on all other joints.
CAUTION
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., use only low temperature type solvent
cement.
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.
44001 101004 [_
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