FAN ASSEMBLY
Before installation of fan, check carefully for shipping damage which may result in blade misalignment, deformed
parts or other damage. After motor has been mounted, check pulley alignment and belt tension. (For details on
pulley alignment, refer to
Page 10
in this booklet.). Before connecting the power source, check motor nameplate to
be sure the correct phase and voltage will be applied. Single phase motors are shipped from the factory wired for
230 volt operation. For low voltage operation see motor manufacturer’s instructions on nameplate. Make sure
propeller turns freely without striking fan frame or any foreign object which may interfere with its operation. Note
direction arrow on orifice to make sure propeller is rotating in the correct direction when power is applied.
As shown on
Page 4
, the fan may be assembled with the motor either below the fan shaft (Bottom Mount) or above
the fan shaft (Top Mount). Before mounting the motor, determine whether Top Mount or Bottom Mount best suits
your needs.
Motor Mounting
The motor bracket must be rotated from its factory-mounted shipping position:
Bottom Mount:
With the fan positioned such that the motor bracket is towards the lower left or lower right of the
fan panel, remove the motor bracket from its shipping position and bolt it to the uprights as shown in Figure 4.
Table 1 shows the upright mounting holes (counting up from the bottom of the upright) to use to mount the motor
bracket.
Top Mount:
With the fan positioned such that the motor bracket is towards the upper left or upper right of the
fan panel, remove the motor bracket from its shipping position, and bolt it to the uprights as shown in Figure 5.
Table 1 shows the upright mounting holes (counting down from the top of the upright) to use to mount the motor
bracket.
Page 3
Figure 4 — Bottom Mount
Figure 5 — Top Mount
Note: It may be necessary to slightly adjust the motor bracket in its slots to achieve proper belt tension.
Place the motor on the motor bracket and bolt it down using the hardware provided. Make sure the motor base
remains flat against the motor bracket.
The motor pulley should be placed on the motor shaft with the “set screw” side of the pulley toward the motor. Using
a long straight bar, check the alignment of the motor pulley, the belt tensioner sheave, and the fan hub pulley. If
necessary, loosen the motor pulley set-screw and/or the motor mounting bolts and adjust as necessary. To align the
belt tensioner, loosen the two tensioner bracket bolts and adjust the position of the tensioner. Re-tighten pulley set
screw, motor mounting bolts, and the tensioner bracket bolts as necessary. IMPORTANT: Motor bracket bolts must
be secured to maintain proper belt alignment and tension.
Once the motor has been properly mounted and the pulleys have been aligned, complete the assembly of the fan by
threading the belt over the fan hub pulley groove, motor pulley, and belt tensioner. The factory mounted tensioner
should be set for proper belt tension. If a tension adjustment becomes necessary, refer to
Page 9
in this booklet.
Again, check for belt alignment using a straight bar as described above. Next, turn the blade assembly by hand to
insure free rotation. The fan is now ready to be mounted onto the wall.
Motor
Power, Frequency
Bottom
Mount
Top
Mount
1 HP, 60 Hz
1 & 2
2 & 4
1 ½ HP, 60 Hz
1 & 3
3 & 4
1 HP, 50 Hz
1 & 3
3 & 4
1 ½ HP, 50 Hz
2 & 3
3 & 4
Table 1 — Mtr. Bkt. Hole Locations
Motor
Bracket
Motor
Bracket
