Joint Cementing Procedure - Lennox ML193UH045P36B Unit Information

Flush­
Mount
Vent
Kit
Pipe
Input Size
51W11
Dia. in.
(US)
51W12
(CA)
3
2 YES
3
2-1/2 YES
045
3
3 YES
3
2 YES
3
2-1/2 YES
070
3
3 YES
3
2 YES
3
2-1/2 YES
090
3
3 YES
2 YES
2-1/2 YES
110
3 YES
135 3 YES
NOTE - Standard Terminations do not include any vent pipe or elbows external to the structure. Any vent pipe or elbows external to the structure must be included in total vent length
calculations. See vent length tables.
* Kits must be properly installed according to kit instructions.
1
Requires field-provided outdoor 1-1/2" exhaust accelerator.
2
Concentric kits 71M80 and 44W92 include 1-1/2" outdoor accelerator, when used with 045 and 070 input models.
3
Flush mount kit 51W11 and 51W12 includes 1-1/2 in. outdoor exhaust accelerator, required when used with 045, 070 and 090 input models.
4
Termination kits 30G28, 44W92, 4493 and 81J20 are certified to ULC S636 for use in Canada only.
5
See table 17 for vent accelerator requirements.

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 in­
take pipe to the connector, if desired. Use a drill or self tap­
ping screw to make a pilot hole.
DANGER
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.
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.
TABLE 12
OUTDOOR TERMINATION USAGE*
STANDARD
Wall Kit
2 inch 3 inch
44J40
22G44 (US)
(US)
4
30G28 (CA)
4
81J20 (CA)
1
YES YES
1
YES YES
1
YES YES
1
YES YES
1
YES YES
1
YES YES
YES
YES
YES
YES
YES
YES
YES
Page 20
Wall Ring Kit
1-1/2 inch
2 inch
Field
Fabricated
15F74
1 5
YES YES
1 5
YES YES
1 5
YES YES
1 5
YES YES
1 5
YES YES
1 5
YES YES
5
YES YES
5
YES YES
5
YES YES
5
YES YES
5
YES
5
YES
5
YES
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.
NOTE - Time is critical at this stage. Do not allow prim­
er to dry before applying cement.
6 - Promptly apply solvent cement to end of pipe and in­
side socket surface of fitting. Cement should be ap­
plied lightly but uniformly to inside of socket. Take care
to keep excess cement out of socket. Apply second
coat to end of pipe.
7 - Immediately after applying last coat of cement to pipe,
and while both inside socket surface and end of pipe
are wet with cement, forcefully insert end of pipe into
socket until it bottoms out. Turn PVC pipe 1/4 turn dur­
ing assembly (but not after pipe is fully inserted) to dis­
tribute cement evenly. DO NOT turn ABS or cellular
core pipe.
NOTE - Assembly should be completed within 20 sec­
onds after last application of cement. Hammer blows
should not be used when inserting pipe.
8 - After assembly, wipe excess cement from pipe at end
of fitting socket. A properly made joint will show a bead
around its entire perimeter. Any gaps may indicate an
improper assembly due to insufficient solvent.
9 - Handle joints carefully until completely set.
CONCENTRIC
2 inch 3 inch
71M80 69M29
(US) (US) 60L46 (US)
4 4 4
44W92 44W92 44W93 (CA)
(CA) (CA)
2
YES
2
YES
2
YES
2
YES
2
YES
2
YES
YES YES
YES YES
YES YES
YES YES
YES YES
YES YES
YES