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DOWNFLOW SUBBASE DIMENSIONS - - IN. (MM)
FURNACE
CASING
FURNACE IN DOWNFLOW APPLICATION
WIDTH
17-1/2
Furnace with or without Cased Coil Assembly or
(445)
21
Furnace with or without Cased Coil Assembly or
(533)
24-1/2
Furnace with or without Cased Coil Assembly or
(622)
*The plenum should be constructed 1/4---in. (6 mm) smaller in width and depth than the plenum dimensions shown above.
A
FACTORY-SUPPLIED
FIELD-INSTALLED
INSULATION
COMBUSTION- -AIR PIPE FOR NON- -DIRECT VENT (1- -PIPE) APPLICATION
FIELD-SUPPLIED
2-IN. (51 mm) DIA.
PVC 90° ELBOW
COMBUSTION-AIR DISC
(FACTORY-SUPPLIED IN
LOOSE PARTS BAG)
CONCENTRIC VENT FOR DIRECT VENT (2- -PIPE) APPLICATION (ALL MODEL SIZES)
B IN. (MM) DIA PVC
VENT/EXHAUST
1
1/2
(38 mm)
KIT PART NO.
A*
KGAVT0701CVT
33---3/8 (848)
KGAVT0801CVT
38---7/8 (987)
*Dimension A will change accordingly as Dimension D is lengthened or shortened.
Dimension D may be lengthened to 60---in. (1524 mm) maximum. Dimension D may also be shortened by cutting the pipes provided in the kit to 12--- in. (305
{
mm) minimum.
Coil Box
Coil Box
Coil Box
1 1 / 4 " (32 μμ) TYP
PLENUM
OPENING
C
(SIZES 040 THROUGH 120 ONLY)
FIELD-SUPPLIED
2-IN. (51 mm) DIA.
PVC PIPE
A
A96211
C IN. (MM) DIA
1
3
/
16 (30 mm)
D
A
B IN. (MM) DIA PVC
INTAKE/COMBUSTION AIR
B
2 (51)
3---1/2 (89)
3 (76)
4---1/2 (114)
PLENUM OPENING
A
B
15---1/8
19
16-3/4
(384)
(483)
18---5/8
19
20---1/4
(473)
(483)
22-1/8
23-3/4
19 (483)
(562)
LOCATING
TAB
B
D
LOCATING
TAB
LENGTH OF STRAIGHT
PIPE PORTION OF COMBUSTION
AIR INLET PIPE ASSEMBLY - IN. (mm)
CASING WIDTH
17-1/2
(445 mm)
21 (533 mm)
24-1/2 (622 mm)
F
E
C
D{
16---5/8 (422)
21---1/8 (537)
8
HOLE NO.
FLOOR OPENING
FOR
WIDTH
ADJUST---
C
D
MENT
20---3/8
3
(425)
(518)
20---3/8
2
(514)
(518)
20---3/8
1
(603)
(518)
4
3
2
1
1
2
3
4
A
8-1/2 ± 1/2 (216 ± 13 mm)
10-1/2 ± 1/2 (267 ± 13 mm)
12 ± 1/2 (305 ± 13 mm)
E
F
6---1/4 (159)
5---3/4 (146)
7---3/8 (187)
6---1/2 (165)
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