Tuf-Lite III
®
5000 Series Installation Manual Page 5 of 8
May 2006
After mounting, install flat washer, lock washer, and 3/8” NC
nuts. Tighten to 15 ft-lb (lubricated) or 20 ft-lb (dry).
(See Figure 7)
Note: Refer to instructions included with seal disc for further
details.
Figure 7
CHECKING TIP CLEARANCE
Rotate fan in position inside fan stack to check tip clearance
(See Figure 8)
. The recommended tip clearance is between
1” and 1 1/2 ”. Check for spots where fan blade clearance is
not within the recommended tolerance. If necessary adjust fan
stack by shimming to obtain proper clearance.
Figure 8
OPERATING INSTRUCTIONS
Start fan and check rotation. Viewed from top (discharge), fan
blades should rotate clockwise.
Check motor power consumption to be sure fan is pulling desired
load
. CAUTION: If positive pitch is set in summer to use all
available motor amps (nameplate rating), motor could be over-
loaded in winter.
Design pitch angles usually do not use all of the
available motor horsepower. This ensures that the motors will not
be overloaded at low winter temperatures.
