Lennox 97G2DFV Installation Instructions Manual page 14

first three feet of vent pipe from the furnace flue collar must
be accessible for inspection.
Table 5 lists the available exhaust termination kits. All vent
terminations are PVC.
Joint Cementing Procedure
All cementing of joints should be done according to the
specifications outlined in ASTM D 2855.
NOTE: A sheet metal screw may be used to secure the
intake pipe to the connector, if desired. Use a drill or self
tapping screw to make a pilot hole.
DANGER OF EXPLOSION!
Fumes from PVC glue may ignite during system check.
Allow fumes to dissipate for at least 5 minutes before
placing unit into operation.
VENT
Capacity PIPE DIA.
(in.)
1-1/2
1
2
070
2-1/2"
3
2
090 2-1/2"
3
2
110 2-1/2"
3
2 inch to 1-1/2 inch reducer required, must be field provided.
1
* Requires field-provided and installed 1-1/2" exhaust accelerator.
** Kit 51W11 is provided with a 1-1/2" accelerator, which must be used for all 70,000 furnace installations. When using 1-/2 in. piping,
the pipe must be transitioned to 2 in. pipe when used with the Flush Mount Kit.
† Termination kits 44W92, 44W93, 30G28 and 81J20 approved for use in Canadian installations to meet CSAB149.
†† The 44W92 concentric kit is provided with a 1-1/2" accelerator, which must be installed on the exhaust outlet when this kit is used
with the 70,000 furnaces. When using 1-1/2 in. piping, the pipe must be transitioned to 2 in. pipe when used with the Concentric
Kit.
Page 14 of 53
DANGER
STANDARD
Outdoor Outdoor
Exhaust Exhaust
Accelerator Accelerator
(Dia. X Length) (Dia. X Length)
1-1/2" x 12" 2" x 12"
YES
YES
YES
YES
YES
YES
YES
YES
YES
Table 5. Outdoor Termination Kits Usage
1. Measure and cut vent pipe to desired length.
2. Debur and chamfer end of pipe, removing any ridges
or rough edges. If end is not chamfered, edge of pipe
may remove cement from fitting socket and result in a
leaking joint.
3. Clean and dry surfaces to be joined.
4. Test fit joint and mark depth of fitting on outside of pipe.
5. Uniformly apply a liberal coat of PVC primer for PVC
or use a clean dry cloth for ABS to clean inside socket
surface of fitting and male end of pipe to depth of fitting
socket.
6. Promptly apply solvent cement to end of pipe and
inside socket surface of fitting. Cement should be
applied lightly but uniformly to inside of socket. Take
care to keep excess cement out of socket. Apply
second coat to end of pipe.
NOTE: Time is critical at this stage. Do Not allow
primer to dry before applying cement.
Flush Mount 1-1/2"
Kit Concentric Kit
71M80
51W11** OR
+44W92++
YES YES
YES YES
YES YES
YES YES
YES
YES
YES
YES
YES
YES
Issue 2341
CONCENTRIC
2" Concentric 3" Concentric
Kit Kit
69M29 60L46
OR OR
+44W92++ 44W93+
YES YES
YES YES
YES YES
YES YES
YES YES
YES YES
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