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Correct blade track by loosening clamp bolts and adjusting blade
to match track of other blades. Re-tighten bolts and re-check
track and pitch angle setting. Re-tighten blade clamp bolts to
recommended standard of 55 ft-lb (lubricated) or 60 ft-lb (dry)
torque.
INSTALL SEAL DISC
Making sure hole in seal disc is over oil filler assembly, fasten
seal disc to top of hub with six (6) 3/8" cap screws. Put flat
washer against seal disc and lock washer between flat washer
and cap screw. Tighten to recommended standard of 15 ft-lb
(lubricated) or 20 ft-lb (dry). Make sure seal disc is not inverted
and not touching blades (See Figure 10).
Figure 10
NOTE: The purpose of the seal disc is to prevent hot air from
recirculating back down through the hub, increasing efficiency.
CHECKING TIP CLEARANCE
Rotate fan in position inside fan ring to check tip clearance (See
Figure 11). Tip clearance recommendations for specific fan
diameters are noted in table.
Figure 11
Installation manual 1000H
Fan Size (ft)
5 through 9
10 through 11
12 through 14
Adjust fan ring for proper clearance at all points around its
circumference. To increase clearance, add spacers at fan ring
joints. Use a chisel to maintain correct distance until bolts on
ring are re-tightened (See Figure 12).
Figure 12
If a small adjustment is needed, tighten or loosen nut on fan
strut in area of incorrect clearance (See Figure 13). Make sure
to re-tighten inside jam nut.
Figure 13
Page 5 of 10
Minimum
Maximum
1/4"
1/2"
1/4"
5/8"
1/4"
3/4"
May 2015
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