Combustible Floor; Filter Arrangement; Gas Piping - Bryant C Series Installation, Start-Up, And Operating Instructions Manual

A
HOLE IN
FLOOR
Fig. 4—Floor Opening for Concrete Slab
TABLE 3—OPENING DIMENSIONS (IN.)
FURNACE CASING
A
WIDTH
14-3/16 13-1/8
17-1/2 16-7/16
21 19-7/8
24-1/2 23-7/16
* These dimensions apply when a model CB or CD Evaporator Coil casing is
to be installed.
FURNACE
Fig. 5—Furnace on a Concrete Slab (Non-Garage
Installation)
B. Installation On a Combustible Floor
1. Cut and frame hole in floor per dimensions in Installation
Instructions packaged with downflow subbase.
2. When completed, downflow subbase, plenum, and furnace
(or coil casing when used) should be installed as shown in
Fig. 6.
WARNING: DO NOT INSTALL THE FURNACE ON
ITS BACK OR SIDES; safety control operation will be
adversely affected. Never connect return-air ducts to the
sides or back of the furnace. Failure to follow this
warning could result in fire, personal injury, or death.
B
A73382
B
Heat-Only Heat/Cool*
19-5/8 19-7/16
19-5/8 19-7/16
19-5/8 19-7/16
19-5/8 19-7/16
PLENUM
A73383
—5—
FURNACE
(OR COIL CASING
WHEN USED)
DOWNFLOW
SUBBASE
SHEET METAL
PLENUM
Fig. 6—Furnace, Plenum, and Subbase Installed on a

Combustible Floor

IV. FILTER ARRANGEMENT
WARNING: Never operate unit without a filter or with
filter access door removed. 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 the return-air duct has been connected to the furnace,
install the filters in a V-formation inside the return-air plenum.
(See Fig. 7.)
V. GAS PIPING
Gas piping must be installed in accordance with national and local
codes. Refer to the current edition of the NFGC. Canadian
installations must be made in accordance with NSCNGPIC 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.
TABLE 4—MAXIMUM CAPACITY OF PIPE*
NOMINAL
IRON INTERNAL
PIPE DIAMETER
SIZE (IN.)
(IN.)
1/2 0.622 175
3/4 0.824 360
1 1.049 680
1-1/4 1.380 1400
1-1/2 1.610 2100
* Cubic ft of gas per hr for gas pressures of 0.5 psig (14-in. wc) or less, and a
pressure drop of 0.5-in. wc (based on a 0.60 specific gravity gas). Ref: Table
C-2 NFPA 54/ANSI Z223.1-1992.
A78651
LENGTH OF PIPE (FT)
10 20 30 40 50
120 97 82 73
250 200 170 151
465 375 320 285
950 770 660 580
1460 1180 990 900