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A
FACTORY-SUPPLIED
FIELD-INSTALLED
INSULATION
FURNACE
FURNACE IN DOWNFLOW
CASING WIDTH
Furnace with or without Cased Coil
14--- 3/16 (360)
Furnace with or without Cased Coil
17--- 1/2 (445)
Furnace with or without Cased Coil
21 (533)
Furnace with or without Cased Coil
24--- 1/2 (622)
*The plenum should be constructed 1/4 ---in. (6 mm) smaller in width and depth than the plenum dimensions shown above.
Concentric Vent Kit
A concentric vent kit allows vent and combustion- -air pipes to
terminate through a single exit in a roof or side wall. One pipe
runs inside the other allowing venting through the inner pipe and
combustion air to be drawn in through the outer pipe.
DOWNFLOW SUBBASE
1
1
/ 4-IN. TYP
PLENUM
OPENING
C
A97427
Assembled
DIMENSIONS (IN. / MM)
APPLICATION
Assembly or Coil Box
Assembly or Coil Box
Assembly or Coil Box
Assembly or Coil Box
LOCATING
LOCATING
TAB
PLENUM OPENING*
A
B
11--- 3/16
19 (483)
(322)
15--- 1/8
19 (483)
(384)
18--- 5/8
19 (483)
(396)
22--- 1/8
19 (483)
(562)
A93086
One base fits all furnace sizes. The base is designed to be installed
between the furnace and a combustible floor when no coil box is
used or when a coil box other than a Payne cased coil is used. It is
CSA design certified for use with Payne branded furnaces when
installed in downflow applications.
12
TAB
B
3
D
2
1
Disassembled
FLOOR OPENING
C
D
13--- 7/16
20--- 5/8
(341)
(600)
16--- 3/4
20--- 5/8
(426)
(600)
20--- 1/4
20--- 5/8
(514)
(600)
23--- 3/4
20--- 5/8
(603)
(600)
Downflow Subbase
4
1
2
3
4
A88207
HOLE NO. FOR
WIDTH
ADJUSTMENT
4
3
2
1
A88202
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