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Installation Manual 5000 Page 5 of 8 August 2000
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 avail-
able horsepower; therefore, motors will not be overloaded at
lowest winter temperatures.