COOK Propeller Inline - Manual (Page 2)

2
Isolator Installation
Floor Mounted Fans
If the fan is being mounted to a metallic base, isolation
pads should be used between the unit and its base to
reduce vibration and noise.
Floor Mounted Rubber-In-Shear (RIS) Isolators
a. Elevate the fan to provide room to insert isolators
between the fan and foundation and block in position.
b. Position isolators under the fan and secure bolts.
c. Remove blocks and allow the fan to rest on floor. Isola-
tors must be installed on a level surface so leveling
should not be required.
d. Secure isolators to mounting surface.
Ceiling Mounted Fans
The most common method used to mount a ceiling fan to
its support structure is with ceiling mounted spring and rub-
ber-in-shear (RIS) isolators.
a. Elevate the fan to operating height and brace.
b. Attached threaded rod to overhead support structure
directly above each mounting hole. The rod should
extend to within a few feet of the fan.
c. Attach isolator to end of threaded rod using a nut on
each side of the isolator bracket.
d. Insert another section of threaded rod through the fan
mounting hole and isolator.
e. Attach two nuts to threaded rod in isolator.
f. Place adjusting nut and locking nut on threaded rod
near fan mounting bracket.
g. Alternately rotate adjusting nut at each mounting loca-
tion until the fan weight is uniformly transferred to the
isolators. Remove bracing.
h. Turn locking nut and secure firmly in place against
mounting bracket.
Fan Installation
If your fan is a direct drive, proceed to Wiring Installation
before completing attachment to the duct.
Floor Mounted Units
a. Bolt down the fan.
b. When the fan is secure, attach the duct to the flanges.
c. Drill holes through the flanges to match the duct, then
bolt the duct and flanges together.
Floor Mounted Rubber-In-Shear Isolator
Ceiling Mounted Spring Isolator Rubber-In-Shear Ceiling Isolators
Belt and Pulley Installation
If your fan is a direct drive, proceed to Isolator Installation.
Belt tension is determined by the sound of the belts when
the fan is first started. The belts will produce a loud squeal,
which dissipates after the fan is operating at full capacity. If
belt tension is too tight or too loose, lost efficiency and dam-
age can occur.
Do not change the pulley pitch diameter to change ten-
sion. The change will result in a different fan speed.
a. Loosen the motor plate adjustment nuts on motor base
and move motor plate in order that the belts can easily
slip into the grooves on the pulleys. Never pry, roll, or
force the belts over the rim of the pulley.
b. Adjust the motor plate until proper tension is reached.
For proper tension, a deflection of approximately 1/4”
per foot of center distance should be obtained by firmly
pressing the belt. Refer to Figure 1.
c. Lock the motor plate adjustment nuts in place.
d. Ensure pulleys are properly aligned. Refer to Figure 2.
Pulley Alignment
Pulley alignment is adjusted by loosening the motor pulley
setscrew and by moving the motor pulley on the motor shaft.
Figure 2 indicates where to measure
the allowable gap for the drive align-
ment tolerance. All contact points (indi-
cated by WXYZ) are to have a gap less
than the tolerance shown in the table.
When the pulleys are not the same
width, the allowable gap must be
adjusted by half of the difference in
width (As shown in A & B of Figure 2).
Figure 3 illustrates using a carpenter’s
square to adjust the position of the
motor pulley until the belt is parallel to
the longer leg of the square.
Figure 1
1 foot
1/4 inch
Tolerance
Center Distance
Maximum
Gap
Up thru 12” 1/16”
12” up through 48 1/8”
Over 48” 1/4”
OFFSET ANGULAR OFFSET/ANGULAR
A
W
X
Y
Z B
CENTER
DISTANCE
(CD)
GAP GAP Figure 2
Figure 3