Bryant GAMA 331JAV User Manual
Page 6
IV. FILTER ARRANGEMENT
WARNING: Never operate unit without a filter or with
filter access door removed. A failure to follow this
warning could result in fire, personal injury, or death.
The 2 factory-supplied filters are shipped in the blower compart-
ment. After return-air duct has been connected to furnace, install
filters in a V-formation inside return-air plenum. (See Fig. 8.)
V. GAS PIPING
Gas piping must be installed in accordance with national and local
codes. Refer to the NFGC NFPA 54-1996/ANSI Z223.1-1996.
Canadian installations must be installed in accordance with NSC-
NGPIC and all authorities having jurisdiction.
The gas supply line should be a separate line directly from the
meter to the furnace, if possible. Refer to Table 4 for recom-
mended gas pipe sizing. Risers should be used to connect to the
furnace and to the meter.
CAUTION: If flexible connector is required or allowed
by authority having jurisdiction, black iron pipe shall be
installed at gas valve and extend a minimum of 2 in.
outside furnace casing.
TABLE 2—FREE AREA OF COMBUSTION AIR OPENING
331JAV
FURNACE
HIGH-FIRE
INPUT
(BTUH)
AIR FROM
UNCONFINED
SPACE
OUTDOOR AIR THROUGH
VERTICAL DUCTS
OUTDOOR AIR THROUGH
HORIZONTAL DUCTS
OUTDOOR AIR THROUGH
SINGLE DUCT
Free Area
of Opening
(Sq In.)
Free Area of
Opening and Duct
(Sq In.)
Round
Pipe
(In. Dia)
Free Area of
Opening and Duct
(Sq In.)
Round
Pipe
(In. Dia)
Free Area of
Opening and Duct
(Sq In.)
Round
Pipe
(In. Dia)
63,000
100
15.8
5
31.5
7
21.0
6
84,000
100
21.0
6
42.0
8
28.0
6
105,000
105
26.3
6
52.5
9
35.0
7
TABLE 3—OPENING DIMENSIONS (IN.)
FURNACE
CASING
WIDTH
APPLICATION
PLENUM OPENING
FLOOR OPENING
A
B
C
D
14-3/16
Non-Combustible Flooring
12-11/16
19
13-3/8
19-5/8
Combustible Flooring Using KGASB Subbase
11-13/16
19
13-7/16
20-3/8
Combustible Flooring with CD5 or CK5 Coil Assembly or
KCAKC Coil Box
12-5/16
19
13-5/16
20
17-1/2
Non-Combustible Flooring
16
19
16-5/8
19-5/8
Combustible Flooring Using KGASB Subbase
15-1/8
19
16-3/4
20-3/8
Combustible Flooring with CD5 or CK5 Coil Assembly or
KCAKC Coil Box
15-1/2
19
16-1/2
20
21
Non-Combustible Flooring
19-1/2
19
20-1/8
19-5/8
Combustible Flooring Using KGASB Subbase
18-5/8
19
20-1/4
20-3/8
Combustible Flooring with CD5 or CK5 Coil Assembly or
KCAKC Coil Box
19
19
20
20
Fig. 5—Floor and Plenum Opening Dimensions
A96283
PLENUM
OPENING
C
A
B
D
FLOOR
OPENING
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