Daikin Maverick II MPS062E Installation And Maintenance Manual page 65

Belts
Rotating parts can cause severe personal injury or death. Replace all
belt/fan guards that are removed temporarily for service.
It is very important that the drive pulleys remain in proper
alignment after adjustments are made. Misalignment of pulleys
results in premature belt wear, noise, vibration, and power
loss. See Figure 63. Premature belt failures are frequently
caused by improper belt tension (either too tight or too loose)
or misaligned pulleys. The proper tension for operating a V-belt
is the lowest tension at which the belts will not slip at peak load
conditions. For initial tensioning, the proper belt deflection half
way between pulley centers is 1/64" for each inch of belt span.
For example, if the belt span is 64 inches, the belt deflection
should be one inch using moderate thumb pressure at midpoint
of the drive, See Figure 64.
Check belt tension two times during the first 24 hours of
operation and periodically thereafter. To adjust belt tension,
simply loosen four fasteners (two on each side of the motor
plate) and slide the motor plate away from the fan shaft until
proper belt tension is attained. On some fans, fasteners
attaching the motor to the motor plate must be loosened in
order to adjust the belt.
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WARNING
Figure 63: Drive Pulley Alignment
Figure 64: Belt Adjustment
65
Unit Options
IM 991-2 • MAVERICK II ROOFTOP