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Page 2 of 42
Issue 2128
FLUE OUTLET
(Top)
SUPPLY AIR
OPENING
TOP VIEW
D
3-1/8 (79)
3
OPTIONAL
EXTERNAL
SIDE RETURN
AIR FILTER KIT
(Either Side)
23-3/4
(603)
25
(635)
23
(584)
GAS PIPING INLET
(Either Side)
Side Return
Air Opening
(Either Side)
1
Bottom Return
Air Opening
ELECTRICAL INLET
(Either Side)
SIDE VIEW
27-3/4
(705)
19-7/16
(494)
23-1/2
(597)
1-1/2
(38)
9-1/8 (232) Right
8-5/8 (219) Left
5-3/8 (137) Right
2-3/16 (56) Left
1-15/16 (49)
14
(356)
9/16
(14)
3 (76) Right
7 (178) Left
2
FLUE OUTLET
(Either Side)
3-1/4 (83)
1
3-1/4
(83)
1-1/2 (38)
Front Panel
AIR FLOW
(19)
3/4
(19)
1
Bottom Return
Air Opening
FRONT VIEW
A
B
9/16 (14)
C
3/4
33
(838)
16
(406)
14-3/4
(375)
3
OPTIONAL
EXTERNAL
SIDE RETURN
AIR FILTER KIT
(Either Side)
5/8
(16)
NOTE
- C*20 size units installed in upflow applications
that require air volumes of 1800 cfm (850 L/s or greater
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.
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.
•
Flue outlet may be horizontal but furnace must be
vented vertically.
•
Optional external side return air filter kit cannot be
used with the optional RAB Return Air Base.
Unit Dimensions
Capacity
A
B
C
D
in.
mm
in.
mm
in.
mm
in.
mm
045A*12
14-1/2
368
13-3/8
340
13
330
4-3/4
121
070A*12(L)
090B*12
17-1/2
446
16-3/8
416
16
406
6-1/4
159
090B*16(L)
110C*16
21
533
19-7/8
504
19-1/2
495
8
203
110C*20(L)