926SB: Installation, Start-up, Operating, Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
45
3. Pilot drill the screw holes for the adapter in the casing and attach
the vent pipe adapter to the furnace with sheet metal screws.
4. Slide the end of the rubber vent coupling with notches in it over the
standoffs on the vent pipe adapter.
5. Insert a length of vent pipe through the coupling into the outlet of
the vent elbow.
6. Tighten the clamp around the outlet of the vent elbow. Torque the
clamp to 15 lb-in.
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.
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. Clean and dry all surfaces to be joined.
5. Check dry fit of pipe and mark insertion depth on pipe.
6. Insert the vent pipe into the vent elbow.
7. Torque clamp on vent elbow 15 lb-in.
8. Torque clamp on vent coupling 15 lb-in.
9. Insert the combustion air pipe into the adapter.
10. Pilot drill a screw hole through the adapter into the combustion air
pipe and secure the pipe to the adapter with sheet metal screws. DO
NOT DRILL INTO POLYPROPYLENE VENT PIPES. Use an
optional accessory vent coupling, if needed.
11. Seal around the combustion air pipe with silicone or foil tape.
SILICONE SEALERS MAY NOT BE APPROPRIATE FOR
POLYPROPYLENE VENT SYSTEMS. SEE
POLYPROPYLENE VENT SYSTEM MANUFACTURER’S
INSTRUCTIONS.
12. After pipes have been cut and pre-assembled, apply generous 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.
13. While cement is still wet, twist pipe into socket with 1/4-in. turn.
Be sure pipe is fully inserted into fitting socket.
14. Wipe excess cement from joint. A continuous bead of cement will
be visible around perimeter of a properly made joint.
15. Handle pipe joints carefully until cement sets.
16. Horizontal portions of the venting system shall be supported to
prevent sagging. Space combustion air piping and vent piping
hangars as shown in Table 18. Support pipes using perforated metal
hanging strap or commercially available hangars or straps designed
to support plastic pipe.
Table 18 – Hanger Spacing
17. 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 sags between hangers is
required. See Caution Box below. Complete the vent and
combustion air pipe installation by connecting the concentric vent
or by installing the required termination elbows as shown in
Fig. 40, Fig. 41 and Fig. 49. For Ventilated Combustion Air
Termination, see Fig. 48.
18. Use appropriate methods to seal openings where combustion air
pipe and vent pipe pass through roof or sidewall.
Installing the Vent Termination
Roof Terminations
A roof termination of any type will require a 4-in. (102 mm) flashing for
a 2 in. (50 mm ND) concentric vent kit, KGAVT0701CVT or a 5-in.
diameter (127 mm) flashing for a 3-in. (80 mm ND) concentric vent kit,
KGAVT0801CVT. For two-pipe or single pipe vent systems, a flashing
for each pipe of the required diameter will be necessary.
It is recommended that the flashing be installed by a roofer or competent
professional prior to installing the concentric vent. The terminations can
be installed on a flat or pitched roof.
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury or death.
To route the vent pipe and combustion air pipe through the furnace, the
manufacturer supplied kit must be used. Failure to properly seal the
blower compartment from the furnace vestibule could result in the
circulation of carbon monoxide throughout the structure. The vent pipe
and combustion air pipe must be a continuous pipe while passing
through the blower compartment. Seals supplied in this kit must be
installed per the instructions provided. Follow all procedures outlined
in these instructions.
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.
Diameter
Material
PVC Sch
40
SDR 21 &
26
ABS CPVC
Polyprop
ylene
1 1/2-in.
3-ft. 2 1/2-ft. 3-ft. 3-ft. 3.25-ft.
38-mm
914-mm 762-mm 914-mm 914-mm 1000 mm
2-in.
3-ft. 3-ft. 3-ft. 3-ft. 3.25-ft.
51-mm
914-mm 914-mm 914-mm 914-mm 1000 mm
2 1/2-in.
3 1/2-ft. 3-ft. 3 1/2-ft. 3 1/2-ft. 3.25-ft.
64-mm
1067-mm 914-mm 1067-mm 1067-mm 1000 mm
3-in.
3 1/2-ft. 3-ft. 3 1/2-ft. 3 1/2-ft. 3.25-ft.
76-mm
1067-mm 914-mm 1067-mm 1067-mm 1000 mm
4-in.
4-ft. 3 1/2-ft. 4-ft. 4-ft. 3.25-ft.
CAUTION
!
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.
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury or death.
DO NOT use cement to join polypropylene venting systems. Follow
the polypropylene venting system manufacturer’s instructions for
installing polypropylene venting systems.
To Next Page
Loading...
