Top View; Front View - Lennox ML180UHT Installation Instructions Manual

Merit series gas furnace upflow / horizontal air discharge
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Unit Dimensions - mm
1
NOTE - 60C and 60D units 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
508 x 635 x 25 mm cleanable air
filter. (Required to maintain proper air velocity.)
2. Single side return with optional return air base.
3. Bottom return air.
4. Return air from both sides.
5. Bottom and one side return air.
See Blower Performance Tables for additional informa­
tion.
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
C
19
1
Bottom Return
Air Opening

FRONT VIEW

ML180UHT Model No.
070TP36A
090TP48B
110TP36C
110TP60C
135TP60D
FLUE OUTLET
14
3
OPTIONAL
EXTERNAL
SIDE RETURN
AIR FILTER KIT
(Either Side)
838
ELECTRICAL
INLET (Either Side)
375
(Either Side)
406
16
19
A
mm
368
446
533
622
Page 2
79
D
(Top)
3
OPTIONAL
EXTERNAL
SIDE RETURN
AIR FILTER KIT
(Either Side)
19
Front Panel
83
76 Right
171 Left
2
232 Right
219 Left
GAS PIPING INLET
137 Right
40 Left
1
Side Return
Air Opening
(Either Side)
83
38
B
mm
340
416
504
546
SUPPLY AIR
OPENING
603
635

TOP VIEW

705
494
FLUE OUTLET
(Either Side)
(Either Side)
584
356
49
597
1
Bottom Return
Air Opening
SIDE VIEW
C
D
mm
mm
330
121
406
159
495
203
584
248
14
38

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