International comfort products A Series Installation Instructions Manual page 35

Fig. 47 - - Vent Coupling and Adapter with Gaskets
Fig. 48 - - Inducer Vent Elbow
NOTICE
The following instructions are for PVC/ABS DWV vent
piping only. DO NOT USE THESE TECHNIQUES FOR
POLYPROPYLENE VENT PIPING SYSTEMS. See the
polypropylene vent system manufacturer's instructions for
installing polypropylene venting systems.
Install the remaining vent and combustion air pipes as shown
below. It is recommended that all pipes be cut, prepared, and
pre- -assembled before permanently cementing any joint.
440 01 4601 01
1. Working from furnace to outside, cut pipe to required
length(s).
2. De- -burr inside and outside of pipe.
3. Chamfer outside edge of pipe for better distribution of
primer and cement.
4. Complete the vent and combustion air pipe installation by
connecting the concentric vent or by installing the required
termination elbows (Fig. 56 and Fig. 57).
For Ventilated Combustion Air Termination (Fig. 58).
5. Clean and dry all surfaces to be joined.
6. Check dry fit of pipe and mark insertion depth on pipe.
7. Insert the vent pipe into the vent elbow.
8. Torque clamp on vent elbow 15 lb- -in.
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9. Torque clamp on vent coupling 15 lb- -in.
10. Insert the combustion air pipe into the adapter.
11. Pilot drill a screw hole through the adapter into the combus-
tion air pipe and secure the pipe to the adapter with sheet
metal screws. DO NOT DRILL INTO POLYPROPYL-
ENE VENT PIPES. Use an optional accessory vent coup-
ling, if needed.
12. Seal around the combustion air pipe with silicone or foil
tape. SILICONE SEALERS MAY NOT BE APPRO-
PRIATE FOR POLYPROPYLENE VENT SYSTEMS.
SEE POLYPROPYLENE VENT SYSTEM MANU-
FACTURER'S INSTRUCTIONS.
13. After pipes have been cut and pre- -assembled, apply gener-
ous layer of cement primer to pipe fitting socket and end of
pipe to insertion mark. Quickly apply approved cement to
end of pipe and fitting socket (over primer). Apply cement
in a light, uniform coat on inside of socket to prevent
buildup of excess cement. Apply second coat. DO NOT
CEMENT POLYPROPYLENE FITTINGS.
14. While cement is still wet, twist pipe into socket with 1/4- -in.
turn. Be sure pipe is fully inserted into fitting socket.
15. Wipe excess cement from joint. A continuous bead of ce-
ment will be visible around perimeter of a properly made
joint.
16. Handle pipe joints carefully until cement sets.
17. Horizontal portions of the venting system shall be
supported to prevent sagging. Space combustion air piping
and vent piping hangers (Table 15). Support pipes using
perforated metal hanging strap or commercially available
hangers or straps designed to support plastic pipe.
18. Slope the vent and combustion air piping downward
towards furnace. A minimum slope of at least 1/4-in. (6
mm) per linear ft.(1-in (25 mm) per 4 ft.(1.2 M)) with no
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sags between hangers is required. See Caution Box below.
FURNACE RELIABILITY HAZARD
Failure to follow this caution may result in nuisance short
cycling, frozen vent termination, and/or no heat.
Slope the vent and combustion air piping downward towards
furnace a minimum of 1/4- -in. (6 mm) per linear ft. of pipe.
19. Use appropriate methods to seal openings where combus-
tion air pipe and vent pipe pass through roof or sidewall.
Specifications subject to change without notice.
CAUTION
!
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