Unit Dimensions - Lennox SIGNATURE SL280UHV Installation Instructions Manual

Unit Dimensions − inches (mm)
1
NOTE − 60C and 60D units that require air volumes over 1800 cfm
(850 L/s) must have one of the following:
1. Return air from single side transition will accommodate 20 x 25 x1 in.
(508 x 635 x 25) cleanable air filter. (Required to maintain proper air
velocity)
2. Single side return air with optional RAB Return
Air Base.
3. Return air from bottom and one side.
4. Return air from both sides.
5. Return air from bottom.
See blower performance tables for additional information
2
Flue outlet may be horizontal but furnace must be
vented vertically
3
Optional external side return air filter kit cannot be used
with the optional RAB Return Air Base.
A
B
AIR FLOW
3/4
C
(19)
1
Bottom Return
Air Opening
FRONT VIEW
Model No.
SL280UH070V36A
SL280UH090V36B
SL280UH090V48B
SL280UH090V60C
SL280UH110V60C
SL280UH135V60D
9/16 (14)
3
OPTIONAL
EXTERNAL
SIDE RETURN
AIR FILTER KIT
(Either Side)
33
(838)
14−3/4
(375)
16
(406)
5/8
(16)
3/4
(19)
A
in. mm,
14−1/2 368 13−3/8
17−1/2 446 16−3/8
21 533 19−7/8
24−1/2 622 23−3/8
D
FLUE OUTLET
(Top)
3
OPTIONAL
EXTERNAL
SIDE RETURN
AIR FILTER KIT
(Either Side)
1−1/2 (38)
Front Panel
3−1/4 (83)
3 (76) Right
7 (178) Left
9−1/8 (232) Right
8−5/8 (219) Left
5−3/8 (137) Right
2−3/4 (70) Left
3−1/4
(83)
B
in. mm in.
340 13
416 16
504 19 1/2
546 23
Page 2
3−1/8 (79)
SUPPLY AIR
OPENING
23−3/4
(603)
25
(635)
TOP VIEW
27−3/4
(705)
19−7/16
(494)
2
FLUE OUTLET
(Either Side)
GAS PIPING INLET
(Either Side)
ELECTRICAL INLET
(Either Side)
23
(584)
14
1 Side Return
(356)
Air Opening
(Either Side)
1−15/16 (49)
23−1/2
(597)
1
Bottom Return
SIDE VIEW
C
mm in.
330 4−3/4
406 6−1/4
495 8
584 9−3/4
9/16
(14)
1−1/2
(38)
D
mm
121
159
203
248