Bryant 396G User Manual
i nsta I lation i nstructions
COUNTERFLOW GAS-FIRED
FORCED-AIR FURNACE
Before installing the fiimace, refer to "Procedure for GasFired Furnaces” (packaged with the equipment) for informa
tion concerning combustion, venting, piping, and other stan
dard installation practices. Further reference is made to the
ciurrent edition of the American National Standard Z223.1
National Fuel Gas Code.
Each furnace is shipped from the factory completely assem
bled with multispeed direct-drive blower and wired ready for
counterflow indoor heating installation only. All sizes
feature a printed-circuit board control center with easy-toread, low-voltage terminal strip to ensure proper connec
tions.
The efficiency rating of the furnace is a product thermal
efficiency rating determined under continuous operating
conditions independent of any installed system.
CAUTION: Do not install furnace in a corrosive or contami
nated atmosphere. Make sure all combustion and circulating
air requirements listed in "Procedure for Gas-Fired Fur
naces” are adhered to, in addition to, all local codes and
ordinances.
The design of the counterflow gas-fired furnace is A.G.A. cer
tified for installation on combustible flooring (with optional
floor base), in alcoves, basements, closets, or utility rooms.
This furnace line is
mobile home, recreation vehicle, or outdoors.
TABLE i-CLEARANCES (In Inches)
Sizes
Sides—Single-Wall Vent
Type-B Double-Wall Vent
Back
Top of Plenum
Vent Connector—Single-Wall
Front—Combustion Air
Service
INTRODUCTION
not A.G.A. certified for installation in a
050 075 thru 150
1
0
1
1
0 0
1 1
Type-B Double-Wall
6 6
1
6 6
1
30 30
Cancels: 40396DP5-A
and 40396DP6-A
I ! '
I" r,
----- ! .- i
40396DP7-A
1/15/80
Ipip Í
A78593
Figure 1—Model 396G036075 With Optional
Vent Damper Installed
Installation comprises the following:
I. Inspection
II. Location, Ventilation, and Air for Combustion
III. Gas Piping
IV. Venting
All of the above steps are covered in general by the like-num
bered sections of the "Procedure for Gas-Fired Furnaces”
booklet packaged with the furnace; therefore, these Installa
tion Instructions will contain only supplementary informa
tion applicable to installing the furnace.
In addition, the following sections deal specifically with in
stallation of the 396G:
V. Supply-Air Plenum Installation
VI. Electrical
VII. Sequence of Operation
VIII. Filter
IX. Startup and Adjustment
X. Care and Maintenance
For accessory installation details, refer to applicable in
stallation literature.
RDP Company, Division of Carrier Corp.
V. SUPPLY-AIR PLENUM INSTALLATION
A. Installation on a concrete slab
1. See Figure 2 for dimensions and location of supply-air
opening in furnace bottom.
2. Construct hole in floor per dimensions in Figure 3 eind
Table IV.
3. Place plenum and furnace as shown in Figure 4.
B. Installation on a combustible floor
1. Read Installation Instructions packaged with combusti
ble floor base.
2. Cut and frame hole in floor per dimensions in Table I of
Installation Instructions packaged with combustible floor
base. If this requires cutting of a floor joist, tie ends of cut
joist into adjacent joists so that proper floor support will be
maintained.
3. Assemble and install combustible floor base per instruc
tions packaged with base.
4. When completed, combustible floor base, plenum, and
furnace (or coil casing when used) should be installed as
shown in Figure 6.
г/
TABLE ll-DIMENSIONS (in Inches)
1Л
ir
ф
пг
.Q..
Г'
KNOCKOUT
ДиХ GAS
INLET
A78595
Size
024050 14-3/16
000075
036075
000100 .
. 048100
000125
048125
060150
Figure 2—Dimensional Drawing
TABLE lil-RATINGS AND PERFORMANCE*
Size
024050 50,000 40,000 45-75 0.50 620
000075
036075 45-75 0.50 925
000100 100,000 80,000
048100
000125 125,000 100,000 70-100 0.20
048125
060150 150,000 120,000 55-85 0.50 1850
Input
Btuh
75,000 60,000 70-100 0.12 700
Bonnet
Capacity
Btuh
Temp
Rise
Range
70-100
60-90 0.50 990
60-90 0.50 1235
Heating Cooling
Ext Static
Pressure
0.20 870
Ft3/Min
1090
*The above ratings are certified for altitudes to 2000 ft. For elevations above 2000 ft, reduce ratings 4% for each 1000 ft above sea level.
A
IT-1/2
. 17-1/2
17-1/217-1/2
21
21 19-3/8
24-1/2
Ext Static
Pressure Ft3/Min
0.5
—
0.5 1255 1/3-SP
— —
0.5 1630
—
0.5 1620
0.5
D
12-9/16
15-7/8
15-7/8
15-7/8
15-7/8
19-3/8
22-13/16
800
— 1/10-SP 146
— 1/5-SP 185
2075
E Vent
12-11/16
16- 4
16
16 5
16
19-1/2
19-1/2
23 6
Motor
HP&
Type
1/3-SP 127
1/5-SP 161
1/2-PSC
1/2-PSC
1/2-PSC 225
Approx
Ship.
Weight
155
168
186
4
4
5
5
5
HOLE IN
FLOOR
3
Figure 3 — Floor Opening for
Concrete Siab
TABLE IV —OPENING DIMENSIONS
Furnace
Size
024050 13-1/8 19-5/8
000075, 036075,
000100, & 048100
000125 & 048125 19-7/8 19-5/8 20-15/16
060150
These dimensions apply when a Model 518A Evaporator Coil casing
is to be installed.
A В
16-7/16
23-7/16 19-5/8
Heat-Only Heat/Cool*
19-5/8
20-15/16
20-15/16
20-15/16
VI. ELECTRICAL CONNECTIONS
A. Line-Voltage Wiring
IMPORTANT: Before proceeding with the electrical connec
tions, make certain that voltage, frequency, and phase cor
respond to that specified on the unit rating plate. Also, check
to be sure that the service provided by the utility is sufficient
to handle the additional load imposed by this equipment. Re
fer to the unit rating plate for equipment electrical require
ments.
CAUTION: Do not connect aluminum wire between discon
nect switch and furnace.
See Figure 8 for wiring diagram showing the proper field
high- and low-voltage wiring. Make all electrical connec
tions in accordance with the National Electrical Code and
any local codes or ordinances that might apply.
-2-
Figure 5—Combustible Floor Base
Set the thermostat heat anticipator at 0.5 for a furnace with a
BDP Model 646A Gas Valve; 0.6 for a furnace with an Essex
Model 242 Gas Valve; 0.2 when a Model 997A Vent Damper is
installed — no matter which of these gas valves is used. If
additional controls are connected in the thermostat circuit,
their amp draw must be added to this setting. A failure to
make this setting will result in improper operation of the
system.
For accurate reading, check the amp draw at the ther
mostat with an ammeter. A failure to make this setting
will result in improper operation of the system.
The room thermostat should be located where it will be in
the natural circulation path of room air. Avoid locations
where the thermostat would be exposed to cold-air infiltra
tion, drafts from windows, doors, or other openings leading
to the outside, or exposure to air currents from warm- or
cold-air registers; or to exposure where the natural circula
tion of the air is cut off—such as behind doors, above or
below mantels, shelves, etc.
The thermostat should not be exposed to heat from nearby
fireplaces, radios, televisions, lamps, or rays from the sun.
Nor should the thermostat be mounted on a wall containing
pipes or warm-air ducts, or a flue or vent that could affect its
operation and prevent it from properly controlling the room
temperature. Any hole in the plaster or panel through which
the wires pass from the thermostat should be adequately
sealed with suitable material to prevent drafts from affect
ing the thermostat.
Figure 6—Furnace, Plenum, and
Base Installed on a Combustible Floor
Use a separate fused branch electrical circuit for this furnace.
A disconnecting means must be located within sight of, and
readily accessible to, the furnace. In some areas, the imit door
switch may qualify as the disconnecting means.
WARNING: The furnace must be electrically grounded in
accordance with local codes, the National Electric Code, and
ANSI C1-1978. Do not use gas piping as an electrical ground.
If line-voltage wiring to the unit is encased in a nonmetallic
sheath, connect the incoming ground wire to the grounding
wire inside the furnace J-box. If metallic conduit is used, it
will serve as the ground.
B. Low-Voltage Wiring
Make field low-voltage connections at the low-voltage ter
minal strip. See Figure 8.
NOTE; Use AWG No. 18 “color-coded” copper thermostat
wire for lengths up to 100 ft. Above 100 ft, use AWG No. 16
wire.
A79077
Figure 7—Printed-Circuit Control Center
Figure 8—Heating and Cooling Application Wiring Diagram
-3-
A78461
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