Field Fabricate Ductwork; Unit Duct Connections - Bryant 580G Installation, Start-Up And Service Instructions Manual

MOTOR
UNIT
MOTOR SHAFT SHAFT
SIZE
HP DIA. SPEED
580G,H
(in.)
5 1.12
240 10 1.38
15 1.62
7.5 1.38
300 10 1.38
15 1.62
10 1.38
324 15 1.62
20 1.62
10 1.38
360 15 1.62
20 1.62
NOTE: Motor shaft speed is 1750 rpm. The fan shaft diameter is 1
A. Positioning
Provide clearance around and above unit for airflow, safety,
and service access (Fig. 2 and 3).
Do not install unit in an indoor location. Do not locate air
inlets near exhaust vents or other sources of contaminated
air.
For proper unit operation, adequate combustion and ventila-
tion air must be provided in accordance with Section 5.3 (Air
for Combustion and Ventilation) of the National Fuel Gas Code,
ANSI Z223.1 (American National Standards Institute).
Although unit is weatherproof, guard against water from higher
level runoff and overhangs.
B. Roof Mount
Check building codes for weight distribution requirements.
III. FIELD FABRICATE DUCTWORK
Secure all ducts to building structure. Use flexible duct con-
nectors between unit and ducts as required. Insulate and weath-
erproof all external ductwork, joints, and roof openings with
counter flashing and mastic in accordance with applicable codes.
Ducts passing through an unconditioned space must be
insulated and covered with a vapor barrier.
To attach ductwork to roof curb, insert ductwork approx-
imately 10 to 11 in. up into the curb. Connect ductwork to
14-gage roof curb material using sheet metal screws driven
from inside the duct.
WARNING: For vertical supply and return units, tools
or parts could drop into ductwork and cause an injury.
Install 90 degree elbow turns in the supply and return
ductwork between the unit and the conditioned space.
If a 90 degree elbow cannot be installed, then grilles of
sufficient strength and density should be installed to
prevent objects from falling into the conditioned space.
IV. UNIT DUCT CONNECTIONS
A. 580G Units
Unit is shipped for through-the-bottom duct connections. Duct-
work openings are shown in Fig. 2. Attach all ductwork to
roof curb. Air distribution is shown in Fig. 5. Refer to
installation instructions shipped with accessory roof curb for
more information.
Table 2 — Evaporator Fan Motor Data
MOTOR
FAN
SHEAVE
MOTOR
PITCH
SHEAVE
DIAMETER
(rpm)
(in.)
717 BK55 4.8
924 2BK50 4.4
1096 2B5V56 5.7
773 BK60H 5.4
962 1B5V60 6.1
1106 2B5V54 5.5
848 2BK50 4.4
1059 2B5V48 4.9
1187 2B5V58 5.9
884 2BK50 4.4
1096 2B5V56 5.7
1187 2B5V58 5.9
11 ⁄
16
FAN
BUSHING SHEAVE
FAN
DIAMETER PITCH
SHEAVE
(in.) DIAMETER
(in.)
None-1.125 1B5V124 12.4
None-1.375 2B5V86 8.6
B-1.625 2B5V90 9.1
H-1.375 1B5V124 12.4
H-1.375 1B5V110 11.1
B-1.625 2B5V86 8.7
None-1.375 2B5V94 9.4
B-1.625 2B5V80 8.1
B-1.625 2B5V86 8.7
H-1.375 2B5V90 9.0
B-1.625 2B5V90 9.1
B-1.625 2B5V86 8.7
inches.
B. 580H Units
Remove shipping covers from supply and return air open-
ings. Attach field-supplied ductwork to unit. Use a single duct
over both return openings and a single duct over both sup-
ply openings. See Fig. 3 for duct opening dimensions. Secure
all ducts to the building structure. See Fig. 6. Use flexible
duct connectors between unit and ducts as required.
Install accessory barometric relief or power exhaust in
the field-fabricated return ductwork. Refer to Power
Exhaust/Barometric Relief Damper Hood section for more
information.
Fig. 5 — Air Distribution — Thru-the-Bottom
Fig. 6 — Air Distribution — Thru-the-Side
—7—
BUSHING OUTSIDE
BELT
DIAMETER BELT
(QUANTITY)
(in.) LENGTH
B-1.9375 BX59 62
B-1.9375 (2) BX51 54
B-1.9375 (2) 5VX530 53
B-1.9375 BX59 62
B-1.9375 5VX590 59
B-1.9375 (2) 5VX530 53
B-1.9375 (2) BX52 55
B-1.9375 (2) 5VX500 50
B-1.9375 (2) 5VX530 53
B-1.9375 (2) BX51 54
B-1.9375 (2) 5VX530 53
B-1.9375 (2) 5VX530 53
BELT
TENSION
(lb at
.24 in.)
5.10
5.21
6.00
6.48
7.37
6.12
5.27
6.63
7.31
5.24
6.00
7.31