Accurex XUEFD-100 Manuale di installazione, funzionamento e manutenzione - Pagina 10

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Accurex XUEFD-100 Manuale di installazione, funzionamento e manutenzione

Radial Gap, Overlap and Wheel Alignment

Wheels must rotate freely and not rub on the inlet
cone. Models XUEFD and XUEF-BI (backward-
inclined) wheels overlap the inlet cone. There
is a gap between the inlet cone and wheel on
models XUEFD and XUEF-FC (forward-curved).
Refer to the tables for the proper dimension.

Radial Gap and Alignment

Efficient fan performance can be maintained by
having the correct radial gap, overlap and wheel
alignment. These items should be checked
after the fan has been in operation for 24 hours
and before start-up when the unit has been
disassembled.
Radial Gap: Adjust inlet cone position such that
the radial gap between the wheel cone and inlet
cone is evenly distributed around the wheel.
Radial gap is adjusted by loosening the inlet cone/
ring bolts and centering the cone/ring on the wheel.
If additional adjustment is required to maintain a
constant radial gap, loosening the bearing bolts and
centering the wheel is acceptable as a secondary
option.
Overlap: Overlap is adjusted by loosening the wheel
hub from the shaft and moving the wheel to the
desired position along the shaft.
The transition between the inlet cone and wheel should
be as shown; there is a smooth feel to the profile when
moving from one component to the other.
Method for Centering Wheel: 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.

Wheel Rotation

Rotation direction of the wheel is critical. 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.
Wheels as viewed from the drive side:
Airflow
Backward Inclined
Airflow
Forward Curved
10
Utility Fans
Backward-Inclined
Overlap
A
Radial
Gap
Radial
Gap
Straight
Straight
Edge
Edge
Inlet
Inlet
Wheel
Cone
Cone
Cone
XUEF-300
306
307
308
310
312
313
315
316
318
320
322
324
327
330
333
336
340
344
349
Forward-Curved
Airflow
Inlet
Cone
Airfoil

Radial Gap and Overlap Dimensions

A
XUEFD-100-BI
(121)
104
4
3
⁄
4
(121)
106
4
3
⁄
4
(121)
108
4
3
⁄
4
(145)
110
5
11
⁄
16
(150)
113
5
7
⁄
8
7 (178)
115
(191)
116
7
1
⁄
2
9 (229)
118
A
XUEF-100-BI
(121)
104
4
3
⁄
4
(121)
106
4
3
⁄
4
(121)
108
4
3
⁄
4
(121)
110
4
3
⁄
4
(146)
113
5
3
⁄
4
(165)
115
6
1
⁄
2
(181)
116
7
1
⁄
8
(219)
118
8
5
⁄
8
(197)
120
7
3
⁄
4
(259)
124
10
13
⁄
16
Radial Gap and Overlap Dimensions
A
XUEF-400
(70)
2
3
⁄
4
5 (127)
(79)
3
1
⁄
8
5 (127)
(29)
407
1
1
⁄
8
(79)
408
3
1
⁄
8
(86)
409
3
3
⁄
8
(95)
410
3
3
⁄
4
(108)
412
4
1
⁄
4
(119)
413
4
11
⁄
16
(132)
415
5
3
⁄
16
(146)
416
5
3
⁄
4
(162)
418
6
3
⁄
8
7 (178)
420
(198)
422
7
13
⁄
16
(219)
424
8
5
⁄
8
(240)
427
9
7
⁄
16
(268)
430
10
9
⁄
16
(291)
433
11
7
⁄
16
(324)
436
12
3
⁄
4
(360)
440
14
3
⁄
16
(395)
444
15
9
⁄
16
(435)
449
17
1
⁄
8
Gap Dimensions
Gap Size
XUEFD-100-FC
Gap
106
3
⁄
8
107
3
⁄
8
Wheel
109
1
⁄
2
110
1
⁄
2
Overlap Overlap Tolerance
inches (mm)
(3)
(2)
1
⁄
1
⁄
8
16
(3)
(2)
1
⁄
1
⁄
8
16
(3)
(2)
1
⁄
1
⁄
8
16
(3)
(3)
1
⁄
1
⁄
8
8
(3)
(3)
1
⁄
1
⁄
8
8
(10)
(3)
3
⁄
1
⁄
8
8
(3)
(3)
1
⁄
1
⁄
8
8
(6)
(3)
1
⁄
1
⁄
4
8
Overlap Overlap Tolerance
inches (mm)
(3)
(2)
1
⁄
1
⁄
8
16
(3)
(2)
1
⁄
1
⁄
8
16
(3)
(2)
1
⁄
1
⁄
8
16
(3)
(2)
1
⁄
1
⁄
8
16
(6)
(3)
1
⁄
1
⁄
4
8
(13)
(5)
1
⁄
3
⁄
2
16
(13)
(5)
1
⁄
3
⁄
2
16
(16)
(6)
5
⁄
1
⁄
8
4
(16)
(6)
5
⁄
1
⁄
8
4
(19)
(10)
3
⁄
3
⁄
4
8
Overlap Overlap Tolerance
inches (mm)
(10)
(3)
3
⁄
1
⁄
8
8
(10)
(3)
3
⁄
1
⁄
8
8
(10)
(3)
3
⁄
1
⁄
8
8
(10)
(3)
3
⁄
1
⁄
8
8
(73)
(3)
2
7
⁄
1
⁄
8
8
(22)
(3)
7
⁄
1
⁄
8
8
(16)
(3)
5
⁄
1
⁄
8
8
(6)
(3)
7
⁄
1
⁄
32
8
(9)
(3)
11
⁄
1
⁄
32
8
(10)
(3)
3
⁄
1
⁄
8
8
(11)
(3)
7
⁄
1
⁄
16
8
(11)
(3)
7
⁄
1
⁄
16
8
(12)
(3)
15
⁄
1
⁄
32
8
(13)
(5)
1
⁄
3
⁄
2
16
(13)
(5)
17
⁄
3
⁄
32
16
(14)
(6)
9
⁄
1
⁄
16
4
(17)
(6)
11
⁄
1
⁄
16
4
(17)
(10)
11
⁄
3
⁄
16
8
(24)
(10)
15
⁄
3
⁄
16
8
(24)
(10)
15
⁄
3
⁄
16
8
(23)
(10)
29
⁄
3
⁄
32
8
(29)
(10)
1
1
⁄
3
⁄
8
8
(32)
(13)
1
1
⁄
1
⁄
4
2
XUEF-100-FC
Gap
(10)
(6)
109
1
⁄
4
(10)
(6)
110
1
⁄
4
(13)
(6)
112
1
⁄
4
(13)
(6)
115
1
⁄
4
(6)
118
1
⁄
4
(6)
120
1
⁄
4
(6)
122
1
⁄
4
(6)
124
1
⁄
4