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IM 926-3 • ROOFPAK APPLIED SYSTEMS 102 www.DaikinApplied.com
Check, Test, and Start Procedures
Drive Belt Adjustment
General Rules of Tensioning
1. The ideal tension is the lowest tension at which the belt
will not slip under peak load conditions.
2.
Check tension frequently during the first 24 - 48 hours of
operation.
3.
Over tensioning shortens belt and bearing life.
4.
Keep belts free from foreign material which may cause
slippage.
5. Make V-drive inspection on a periodic basis. Adjust
tension if the belt is slipping. Do not apply belt dressing.
This may damage the belt and cause early failure.
Tension Measurement Procedure
2.
Place belt tension checker squarely on one belt at the
center of the belt span. Apply force to the checker,
perpendicular to the belt span, until the belt deflection
equals belt span distance divided by 64. Determine force
applied while in this position.
3.
Compare this force to the values on the drive kit label
found on the fan housing.
Figure 115: Drive Belt Adjustment
Sheave Alignment
Mounting and Adjusting Motor Sheaves
Mounting:
1.
Verify both driving and driven sheaves are in alignment
and the shafts are parallel. The center line of the driving
sheave must be in line with the ce1nter line of the driven
2.
Verify that all setscrews are torqued to the values shown
before starting drive. Check
setscrew torque and belt tension after 24 hours of service.
Figure 116: Sheave Alignment (Adjustable Shown)
Summary of Contents for RoofPak RCS Series
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