Installation Manual 5000K
Page 5 of 8
May 2012
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
TIP CLEARANCE
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 overloaded 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.