SCXF-SVX01B-EN 85
Adjusting Belt Tension
To adjust belt tension refer to Figure O-M-
5 on page 84 and perform the following
procedure:
1. Loosen bolts A, B, and E on both sides
of the sliding motor base. See Figure O-
M-6.
2. Loosen nuts C and D (as required for
motor horsepower) to slide the motor
on its mounting plate in the proper
direction to tension or relieve tension on
the belt.
3. Adjust nuts A-D and bolt E. Do not
stretch the belts over the sheaves.
4. Retighten all nuts and bolts.
5. Verify tension is adjusted properly.
Do not over-tension the belts.
Excessive tension will reduce fan
and motor bearing life, accelerate
belt wear, and possibly cause
shaft failure.
Recommended belt tension range values
are on the unit fan scroll. To access the
fan scroll, face the right-hand side of the
unit and remove the top left panel. The
belt tension label is on the top right-hand
corner of the fan scroll. See Figures O-M-
7 and O-M-8.
The correct operation tension for a V-belt
drive is the lowest tension at which the
belt will not slip under the peak load
conditions. It may be necessary to
increase the tension of some drives to
reduce flopping or excessive start-up
squealing.
Figure O-M-6. Belt tensioning with fan adjustment points.
Figure O-M-7. Location of fan belt label on
fan scroll.
Figure O-M-8. Right side view of the self-contained unit.
CAUTION
!
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