Bryant 524J - Manual (Page 27)

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Table 9E -- Medium--Static Drive Data, 60 Hz — SI
UNIT
524J*25A
524J*25H
524J*28A 524J*30A
MOTOR DRIVE
Motor Pulley Pitch Diameter (mm) 109.2---134.6 109.2---134.6 109.2---134.6
Pulley Factory Setting
Full Turns Open
3.0 3.0 3.0
FAN DRIVE
Pulley Pitch Dia (mm) 239 239 239
Pulley Bore (mm) 36.5 49.2 49.2
Belt No. — Section 1—B 2—B † 2—B †
Belt Pitch (mm) 1062
(2) 986
(2) 1011
(2) 986
(2) 1011
FAN SPEEDS (r/s)
Factory Setting 14.7 14.7 14.7
Range 13.3---16.4 13.3---16.4 13.3---16.4
Max Allowable Speed (r/s) 20.0 18.3 18.3
Change per 1 /
2
Turn of
Moveable Motor Pulley
Flange
0.255 0.255 0.255
MAX FULL TURNS FROM
CLOSED POSITION
6 6 6
SHAFTS CENTER DISTANCE (mm) 232---279 169---240 169---240
† Four belts shipped with unit. Use correct set of 2 belts sized according to the pulley setting.
Table 9F -- High--Static Drive Data, 60 Hz — SI
UNIT
524J*25A
524J*25H
524J*28A 524J*30A
MOTOR DRIVE
Motor Pulley Pitch Diameter (mm) 109.2---134.6 109.2---134.6 109.2---134.6
Pulley Factory Setting
Full Turns Open
3.0 3.0 3.0
FAN DRIVE
Pulley Pitch Dia (mm) 188 203 † 203
Pulley Bore (mm) 36.5 49.2 49.2
Belt No. — Section 2—B 2—B 2—B
Belt Pitch (mm) 935 935 960
FAN SPEEDS (r/s)
Factory Setting 18.6 17.1 17.1
Range 16.9---20.0 † 14.6---17.9 14.6---7.9
Max Allowable Speed (r/s) 20.0 18.3 18.3
Change per 1 /
2
Turn of
Moveable Motor Pulley
Flange
0.323 0.278 0.278
MAX FULL TURNS FROM
CLOSED POSITION
6 6 6
SHAFTS CENTER DISTANCE (mm) 207---255 169---240 169---240
† It is possible to adjust drive so that fan speed exceeds maximum allowable. DO NOT exceed 20 r/s
524J