FumeJet
®
Fume Exhaust Fans
8
®
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.
Wheels as viewed from the drive side:
NOTE
Model FJ-M 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.
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Rotation
Rotation
Backward Inclined
Forward Curved
Airflow
Airflow
Backward Inclined
Forward Curved
Airflow
Airflow
These are the original drawings on the Illustrator file
when I opened it. The IOM had the wheel layered on
top of the scroll.
I will incorporate the
wheel on the scroll
without creating
an additional
layer in the
InDesign file.
April 19, 2011
I positioned the wheels onto the scroll outline. The forward curved wheel was mirrored and
positioned on the scroll above. This is how was done in the InDesign Utility Fans IOM file.
The wheel was laid on top of the scroll within the InDesign file. Better to do this within Illustrator.
barb w
January 18, 2016
Change to Upblast for the Fume Exhaust Installation Instruction
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Airflow
Airfoil
Backward Inclined
Forward Curved
Airfoil
Wheels must rotate freely and not rub on the inlet cone.
Model FJ-M wheels overlap the inlet cone. Refer to the
table 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
Cone
Radial
Gap
Radial
Gap
Overlap
A
Straight
Edge
Straight
Edge
Wheel
Cone
Wheel
Cone
Inlet
Cone
Inlet
Cone
Inlet
Cone
Inlet
Cone
Radial Gap, Overlap and Wheel Alignment
"
Radial Gap and Overlap Dimensions
Size
A
Overlap
Radial
Gap
315
127
7.3
3.3
355
144
8.2
3.5
400
162
9.3
3.5
450
182
10.4
4
500
201
11.6
4.3
560
226
13
5
630
255
14.6
5.5
710
287.5
16.5
6.3
All dimensions are in millimeters.
