Greenheck Fan Centrifugal Utility Fan Model SWB Series 100 - Manual (Page 5)

5 Centrifugal Utility Fans
Wheel Rotation
Rotation direction of the wheel is critical and incorrect
rotation will result in reduced air performance,
increased motor loading and possible motor burnout.
Check wheel rotation by momentarily energizing the
unit and noting if rotation is in the same direction as
the airflow at the outlet and conforms to the rotation
decal affixed to the unit.
Approximate Wheel Clearance Dimensions
Unit Size SWB SFD SFB
SFD SFB
SWB
Series
100
SWB
Series
200
SWB
Series
300
Overlap
Overlap
Tolerance
Radial
Gap
Gap Gap
inches (mm)
6 106 206 — — — 3 ⁄
8 (10) —
7.5 107 207 — — — 3 ⁄
8 (10) —
9 9 108 208 — — — 1 ⁄
2
(13) 1 ⁄
2
(13)
10 10 110 210 3 ⁄
8
(10) 1 ⁄
4
(6) 5 ⁄
32
(4) 1 ⁄
2
(13) 1 ⁄
2
(13)
12 212 3 ⁄
8
(10) 1 ⁄
4
(6) 5 ⁄
32
(4) — 1 ⁄
2
(13)
113 213 7 ⁄
16
(11) 1 ⁄
4
(6) 5 ⁄
32
(4) — 1 ⁄
2
(13)
15 115 215 1 ⁄
2
(13) 1 ⁄
4
(6) 5 ⁄
32
(4) — 1 ⁄
2
(13)
116 216 1 ⁄
2
(13) 1 ⁄
4
(6) 5 ⁄
32
(4) — —
18 118 218 5 ⁄
8
(16) 3 ⁄
8
(10) 5 ⁄
32
(4) — 1 ⁄
2
(13)
20 120 220 5 ⁄
8
(16) 3 ⁄
8
(10) 5 ⁄
32
(4) — 5 ⁄
8
(16)
22 222 11 ⁄
16
(18) 3 ⁄
8
(10) 5 ⁄
32
(4) — 5 ⁄
8
(16)
124 224 3 ⁄
4
(19) 3 ⁄
8
(10) 5 ⁄
32
(4) — —
25 — — — — 3 ⁄
4
(19)
27 327 7 ⁄
8 (22) 1 ⁄
4 (6) 3 ⁄
16 (5) — 3 ⁄
4 (19)
30 330 15 ⁄
16
(24) 3 ⁄
8
(10) 3 ⁄
16
(5) — 3 ⁄
4
(19)
333 1 1 ⁄
16
(27) 3 ⁄
8
(10) 3 ⁄
16
(5) — —
336 1 3 ⁄
16
(30) 3 ⁄
8
(10) 3 ⁄
16
(5) — —
340 1 1 ⁄
4
(32) 3 ⁄
8
(10) 1 ⁄
4
(6) — —
344 1 7 ⁄
16
(37) 3 ⁄
8
(10) 5 ⁄
16
(8) — —
349 1 9 ⁄
16
(40) 1 ⁄
2
(13) 5 ⁄
16
(8) — —
On belt drive units, centering can be accomplished
by (a) loosening the inlet cone bolts to move the inlet
cone or by (b) loosening the bearings in order to
move the shaft. Wheel and inlet cone overlap can be
adjusted by loosening the wheel hub set screws and
moving the wheel to the desired position. Tighten all
fasteners and set screws securely and realign drive
pulleys after adjustment.
NOTE
Models SFD and SFB units should be operated only
when attached to the system for which they were
designed. Without proper system static pressure,
the motor could be overloaded.
Wheels as viewed from the drive side:
Airfoil
Forward Curved
Backward Inclined
Airflow
R
o
ta
ti
o
n
Airflow
R
o
ta
tio
n
R
o
ta
ti
o
n
Airflow
®