Bryant 524J Series Installation, Start-Up And Service Instructions Manual page 28

UNIT
MOTOR DRIVE
Motor Pulley Pitch Diameter
(mm)
Pulley Factory Setting
Full Turns Open
FAN DRIVE
Pulley Pitch Dia (mm)
Pulley Bore (mm)
Belt No. — Section
Belt Pitch (mm)
FAN SPEEDS (r/s)
Factory Setting
Range
Maximum Allowable Speed (r/s)
Change Per 1/2 Turn of
Moveable Motor Pulley
Flange
MAXIMUM FULL TURN FROM
CLOSED POSITION
SHAFTS CENTER DISTANCE
(mm)
NOTE(S):
a. Four belts shipped with unit. Use correct set of 2 belts sized according to the pulley setting.
UNIT
MOTOR DRIVE
Motor Pulley Pitch Diameter
(mm)
Pulley Factory Setting
Full Turns Open
FAN DRIVE
Pulley Pitch Dia (mm)
Pulley Bore (mm)
Belt No. — Section
Belt Pitch (mm)
FAN SPEEDS (r/s)
Factory Setting
Range
Maximum Allowable Speed (r/s)
Change Per 1/2 Turn of
Moveable Motor Pulley
Flange
MAXIMUM FULL TURN FROM
CLOSED POSITION
SHAFTS CENTER DISTANCE
(mm)
NOTE(S):
a. It is possible to adjust drive so that fan speed exceeds maximum allowable. DO NOT exceed 20 r/s.
Table 19 — Medium-Static Drive Data, 60 Hz — SI
524J*25A
524J*25H
109.2-134.6
3.0
239
36.5
1 — B
1062
14.7
13.3-16.4
20.0
0.255
6
232-279
Table 20 — High-Static Drive Data, 60 Hz — SI
524J*25A
524J*25H
109.2-134.6
3.0
188
36.5
2 — B
935
18.6
16.9-20.0
a
20.0
0.323
6
207-255
28
524J*28A
109.2-134.6
3.0
239
49.2
2 — B
a
2) 986
(2) 1011
14.7
13.3-16.4
18.3
0.255
6
169-240
524J*28A
109.2-134.6
3.0
203
49.2
2 — B
935
17.1
14.6-17.9
18.3
0.278
6
169-240
524J*30A
109.2-134.6
3.0
239
49.2
2 — B
a
2) 986
(2) 1011
14.7
11.2-3.9
18.3
0.255
6
169-240
524J*30A
109.2-134.6
3.0
203
49.2
2 — B
960
17.1
14.6-17.9
18.3
0.278
6
169-240