27
Table 9A — Standard Drive Data, 60 Hz — English
Table 9B — Medium-Static Drive Data, 60 Hz — English
UNIT
40RUA*25
40RUS*25
40RUA*28
40RUS*28
40RUA*30
40RUS*30
MOTOR DRIVE
Motor Pulley Pitch Diameter (in.)
3.7-4.7
4.3-5.3
4.3-5.3
Pulley Factory Setting
Full Turns Open
3.0
3.0
3.0
FAN DRIVE
Pulley Pitch Dia (in.)
9.4
11.0
11.0
Pulley Bore (in.)
1
7
/
16
1
15
/
16
1
15
/
16
Belt No. — Section
2—B
2—B
†
2—B
†
Belt Pitch (in.)
41.8
(2) 42.8
(2) 43.8
(2) 42.8
(2) 43.8
FAN SPEEDS (rpm)
Factory Setting
771
752
752
Range
679-863
682-841
674-831
Max Allowable Speed (rpm)
1200
1100
1100
Change per
1
/
2
Turn of
Moveable Motor Pulley
Flange
15.3
13.1
13.1
MAX FULL TURNS FROM
CLOSED POSITION
6
6
6
SHAFTS CENTER DISTANCE (in.)
9.12-
10.99
6.67-
9.43
6.67-
9.43
†
Four belts shipped with unit. Use correct set of 2 belts sized according to the pully setting.
UNIT
40RUA*25
40RUS*25
40RUA*28
40RUS*28
40RUA*30
40RUS*30
MOTOR DRIVE
Motor Pulley Pitch Diameter (in.)
4.3-5.3
4.3-5.3
4.3-5.3
Pulley Factory Setting
Full Turns Open
3.0
3.0
3.0
FAN DRIVE
Pulley Pitch Dia (in.)
9.4
9.4
9.4
Pulley Bore (in.)
1
7
/
16
1
15
/
16
1
15
/
16
Belt No. — Section
1—B
2—B
†
2—B
†
Belt Pitch (in.)
41.8
(2) 38.8
(2) 39.8
(2) 38.8
(2) 39.8
FAN SPEEDS (rpm)
Factory Setting
881
881
881
Range
798-984
798-984
798-984
Max Allowable Speed (rpm)
1200
1100
1100
Change per
1
/
2
Turn of
Moveable Motor Pulley
Flange
15.3
15.3
15.3
MAX FULL TURNS FROM
CLOSED POSITION
6
6
6
SHAFTS CENTER DISTANCE (in.)
9.16-
10.99
6.67-
9.43
6.67-
9.43
†
Four belts shipped with unit. Use correct set of 2 belts sized according to the pully setting.
