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Table 9C -- High--Static Drive Data, 60 Hz — English
UNIT
524J*25A
524J*25H
524J*28A 524J*30A
MOTOR DRIVE
Motor Pulley Pitch Diameter (in.) 4.3---5.3 4.3---5.3 4.3---5.3
Pulley F actory Setting
Full Turns Open
3.0 3.0 3.0
FAN DRIVE
Pulley Pitch Dia (in.) 7.4 8.6 8.6
Pulley Bore (in.) 1
7
/
16
1
15
/
16
1
15
/
16
Belt No. — Section 2—B 2—B 2—B
Belt Pitch (in.) 36.8 378 37.8
FAN SPEEDS (rpm)
Factory Setting 1118 1024 1024
Range 1014---1200Ă
†
873---1075 873---1075
Max Allowable Speed (rpm) 1200 1100 1100
Change per
1
/
2
Turn of
Moveable Motor Pulley
Flange
19.4 16.7 16.7
MAX FULL TURNS FROM
CLOSED POSITION
6 6 6
SHAFTS CENTER DISTANCE (in.) 8.16---10.02 6.67---9.43 6.67---9.43
†
It is possible to adjust drive so that fan speed exceeds maximum allowable. DO NOT exceed 1200r pm.
Table 9D-- Standard Drive Data, 60 Hz — SI
UNIT
524J*25A
524J*25H
524J*28A 524J*30A
MOTOR DRIVE
Motor Pulley Pitch Diameter (mm) 94.0---119.4 109.2---134.6 109.2---134.6
Pulley F actory Setting
Full Turns Open
3.0 3.0 3.0
FAN DRIVE
Pulley Pitch Dia (mm) 239 279 279
Pulley Bore (mm) 36.5 49.2 49.2
Belt No. — Section 2—B 2—B
†
2—B
†
Belt Pitch (mm) 1062
(2) 1987
(2) 1113
(2) 1987
(2) 1113
FAN SPEEDS (r/s)
Factory Setting 12.9 12.5 12.5
Range 11.3---14.4 11.4---14.0 11.2---13.9
Max Allowable Speed (r/s) 20.0 18.3 18.3
Change per
1
/
2
Turn of
Moveable Motor Pulley
Flange
0.255 0.218 0.218
MAX FULL TURNS FROM
CLOSED POSITION
6 6 6
SHAFTS CENTER DISTANCE (mm) 232---279 169---240 169---240
†
Four beltsshipped with unit. Use correct set of 2 beltssized accordingto the pulley setting.
524J