Unit Dimensions - Lennox G51MP SERIES Installation Instructions Manual

G51MP Unit Dimensions − inches (mm)
*NOTE − 60C and 60D size units installed in upflow applica-
tions that require air volumes over 1800 cfm (850 L/s) must
have one of the following:
1. Single side return air with transition, to accommodate
20 x 25 x 1 in. (508 x 635 x 25 mm) air filter.
Required to maintain proper air velocity.
2. Single side return air with optional RAB Return Air Base
3. Bottom return air.
4. Return air from both sides.
5. Bottom and one side return air.
Refer to Engineering Handbook for additional information.
**Consider sizing requirements for optional IAQ equipment
before cutting side return opening.
1
Optional External Side Return Air Filter Kit is not for use
with the optional RAB Return Air Base.
A
B
AIR FLOW
C
3/4 (19)
*Bottom Return
Air Opening
FRONT VIEW
Model No.
G51MP−24B−045
G51MP−36B−045
G51MP−36B−070
G51MP−36C−090
G51MP−48C−090
G51MP−60C−090
G51MP−48C−110
G51MP−60C−110
G51MP−60D−135
9/16 (14)
11−5/8 (295)
Right
9−3/4 (248)
1
OPTIONAL
Left
EXTERNAL
SIDE RETURN
AIR FILTER KIT
(Either Side)
4−7/8 (124) Right
40
(1016)
14−3/4
(375)
16
(406)
5/8 (16)
3/4 (19)
A
in. mm
17−1/2 446
21 533
24−1/2 622
Page 2
1
OPTIONAL
EXTERNAL
SIDE RETURN
AIR FILTER KIT
(Either Side)
5−1/2
6−1/2
(140)
(165)
6−1/2
3−1/8
(165)
(79)
4−1/8
6−3/4
(103)
(171)
2−1/4 (57) Left
2−1/2
(64)
4
(102)
18-3/4 (476)
4−1/4
(108)
B
in. mm
16−3/8 416
19−7/8 504
23−3/8 546
SUPPLY AIR
OPENING
23-3/4 (603)
25 (635)
TOP VIEW
28−1/2
(724)
19−7/16
(378)
COMBUSTION AIR INTAKE
(Either Side)
EXHAUST AIR OUTLET
(Either Side)
GAS PIPING INLET
(Either Side)
CONDENSATE
TRAP CONNECTION
(Either Side)
ELECTRICAL INLET
(Either Side)
23
(584)
14**
*OPTIONAL
(356)
RETURN CUTOUT
(Either Side)
1−15/16 (49)
23−1/2
(597)
*Bottom Return
Air Opening
SIDE VIEW
C
in.
16
19−1/2
23
9/16
(14)
mm
406
495
584