Lennox G51MP SERIES Installation Instructions Manual page 17

Use PVC primer and solvent cement or ABS solvent cement
meeting ASTM specifications, refer to Table 4. As an alter-
nate, use all purpose cement, to bond ABS, PVC, or CPVC
pipe when using fittings and pipe made of the same materi-
als. Use transition solvent cement when bonding ABS to ei-
ther PVC or CPVC.
Low temperature solvent cement is recommended. Metal or
plastic strapping may be used for vent pipe hangers. Uni-
formly apply a liberal coat of PVC primer for PVC or use a
clean dry cloth for ABS to clean inside socket surface of fit-
ting and male end of pipe to depth of fitting socket.
OUTDOOR TERMINATION KITS AND CORRESPONDING EQUIVALENCIES
Outdoor Ex-
haust Accel-
VENT
UNIT erator
PIPE
MODEL
DIA.
(Dia. X
(in.)
Length)
1−1/2" X 12"
2 4
2−1/2 5
24B−045
36B−045
3 7
4 14
2 4
2−1/2 5
36B−070
3 8
4 14
Not
2
Allowed
Not
2−1/2
36C−090
Allowed
48C−090
Not
60C−090
3
Allowed
Not
4
Allowed
Not
2
Allowed
Not
2−1/2
48C−110
Allowed
60C−110
Not
3
Allowed
Not
4
Allowed
Not
3
Allowed
60D−135
Not
4
Allowed
*Requires field−provided and installed 1−1/2" exhaust accelerator.
**Requires field−provided and installed 2" exhaust accelerator.
***For use only in non−direct vent applications, when snow riser is not re-
quired. Requires field−provided and installed 2" exhaustaccelerator.
TABLE 5
Vent Pipe Length Equivalency (feet)
Outdoor Ex-
haust Accel-
1−1/2"
erator
Concentric
centric Kit
(Dia. X
Kit
Length)
71M80
2" X 12"
or 44W92† or 44W92†
Not
12
Allowed
Not
15
Allowed
Not
21
Allowed
Not
42
Allowed
Not
12
Allowed
Not
15
Allowed
Not
24
Allowed
Not
42
Allowed
Not
1
Allowed
Not
2
Allowed
Not
2
Allowed
Not
4
Allowed
Not
1
Allowed
Not
2
Allowed
Not
2
Allowed
Not
4
Allowed
Not
6
Allowed
Not
10
Allowed
Page 17
Canadian Applications Only − Pipe, fittings, primer
and solvent cement used to vent (exhaust) this ap-
pliance must be certified to ULC S636 and supplied by a
single manufacturer as part of an approved vent (ex-
haust) system. When bonding the vent system to the fur-
nace, use ULC S636 approved One−Step Transition Ce-
ment to bond the pipe to the flue collar, or to bond the 90°
elbow or reducing 90° elbow to the flue collar. In addi-
tion, the first three feet of vent pipe from the furnace flue
collar must be accessible for inspection.
Table 5 lists the available exhaust termination kits, as well
as vent pipe equivalencies which must be used when siz-
ing vent pipe. All Lennox vent terminations are PVC.
2" Con- 3" Con- 2" Wall Plate
centric Kit
69M29 60L46 22G44
or 44W93† or 30G28†
Not Not
Allowed Allowed
Not Not
Allowed Allowed
Not Not
Allowed Allowed
Not Not
Allowed Allowed
Not Not
Allowed Allowed
Not Not
Allowed Allowed
Not Not
Allowed Allowed
Not Not
Allowed Allowed
3 3
Allowed
6 6
Allowed
6 6
Allowed
12 12
Allowed
3 3
Allowed
6 6
Allowed
6 6
Allowed
12 12
Allowed
Not
15
Allowed Allowed
Not
25
Allowed Allowed
† Termination kits 44W92 (includes 1−1/2" reducer), 44W93, 30G28 and
81J20 approved for use in Canadian installations.
3" Wall Plate 2" Wall
Kit Kit Ring Kit
44J40
15F74
or 81J20†
4 4*
5 5*
7 7*
14 14*
4 4*
5 5*
8 8*
14 14*
Not
1
Not
2
Not
2
Not
4
Not
1
Not
2
Not
2
Not
4
Not
6
Not
10 10***
4
5
7
14
4
5
8
14
1**
2**
2**
4**
1**
2***
2***
4***
6***