International comfort products G9MVE A3 Series Installation Instructions Manual page 47

INSTALLATION INSTRUCTIONS
NOTES:
1. Attach vent pipe adapter with gasket to furnace casing.
2. Align notches in rubber coupling over standoffs on
adapter. Slide clamps over the coupling.
3. Slide vent pipe through adapter and coupling into vent
elbow.
4. Insert vent pipe into vent elbow.
5. Torque all clamps 15−lb.−in.
6. Attach combustion air pipe adapter with gasket to
furnace.
7. Attach combustion air pipe to adapter with silicone. Pilot
drill a 1/8−in. Hole in adapter and secure with a #7 x
1/2−in. Sheet metal screw.
Installing the Vent Pipe Adapter and
Combustion Air Pipe Adapter
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.
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.
NOTE: The rubber coupling that attaches to the vent pipe
adapter must be used. The adapter seals the vent pipe to the
casing and reduces the strain on the vent elbow attached to the
inducer.
1. Apply the gaskets to the vent pipe and combustion air
pipe adapters. If supplied, remove and discard round
center "slug" from interior of gasket. See Figure 42.
NOTE: The vent pipe adapter can be distinguished from the
inlet pipe adapter by the absence of an internal pipe-stopping
ring. The vent pipe can pass through the vent pipe adapter; it
cannot pass through the inlet pipe adapter.
2. Align the screw holes in the plastic vent pipe adapter with
the dimples in the casing.
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.
440 01 4401 02
The following instructions are for PVC/ABS DWV vent piping,
only. DO
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
preassembled 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.
APPROPRIATE
SYSTEMS. SEE POLYPROPYLENE VENT SYSTEM
MANUFACTRUER'S INSTRUCTIONS.
12. After pipes have been cut and preassembled, 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 the table
below. Support pipes using perforated metal hanging
strap or commercially available hangars or straps
designed to support plastic pipe.
Material
PVC Sch
40
CPVC
ABS
Polyprop
ylene
SDR 21
& 26
Specifications subject to change without notice.
Gas Furnace: (F/G)9MVE
NOTICE
NOT USE THESE TECHNIQUES
SILICONE SEALERS
FOR POLYPROPYLENE
Hangar Spacing
Pipe Diameter
1 ½­in. 2­in. 2 ½­in.
(38­mm) (51­mm) (64­mm)
36­in. 42­in.
(914­mm) (1067­mm)
36­in. 42­in.
(914­mm) (1067­mm)
36­in. 42­in.
(914­mm) (1067­mm)
40­in.
(1000­mm)
30­in. 36­in.
(762­mm) (914­mm)
FOR
MAY NOT BE
VENT
3­in. 4­in.
(76­mm) (102­mm)
48­in.
(1219­mm)
48­in.
(1219­mm)
48­in.
(1219­mm)
42­in.
(1067­mm)
47