COOK ACSC Installation, Operation And Maintenance Manual - Page 3
Browse online or download pdf Installation, Operation And Maintenance Manual for Fan COOK ACSC. COOK ACSC 9 pages. Smoke control ventilator
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• Inspect bolts and setscrews for tightness. Tighten as
necessary. Refer to Recommended Torque chart.
• Inspect belt wear and alignment. Replace worn belts
with new belts and adjust alignment as needed. Refer to
Belt and Pulley Installation.
• Bearings should be inspected as recommended in the
Conditions Chart.
• Inspect for cleanliness. Clean exterior surfaces only.
Removing dust and grease on motor housing assures
proper motor cooling.
Belt and Pulley Installation
Belt tension is determined by the sound the belts make
when the fan is first started. Belts will produce a loud
squeal which dissipates after the fan is operating at full
capacity. If the belt tension is too tight or too loose, lost ef-
ficiency and possible damage can occur.
Do not change the pulley pitch diameter to change
tension. This will result in a different fan speed.
1. Loosen motor plate adjustment bolts and move motor
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.
2. Slide the motor plate back until proper tension is
reached. For proper tension, a deflection of approxi-
mately 1/4" per foot of center distance should be ob-
tained by firmly pressing the belt. Refer to Figure 1.
3. Lock the motor plate adjustment bolts in place.
4. Ensure pulleys are properly aligned. Refer to Figure 2.
Tolerance
Center
Max.
OFFSET
Distance
Gap
A
Up through 12" 1/16"
W
12" through 48" 1/8"
Over 48"
1/4"
X
Y
Figure 2
Z
B
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 alignment tolerance. All contact points (indi-
cated by WXYZ) are to have a gap less than the tolerance
ACSC IO&M
Figure 1
ANGULAR
OFFSET/ANGULAR
CENTER
DISTANCE
(CD)
GAP
shown in the table. When the pulleys
are not the same width, the allowable
gap must be adjusted by half of the dif-
ference in width. 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.
Operation
Pre-Start Checks
1.
Lock out all the primary and secondary power sources.
2.
Inspect and tighten fasteners and setscrews, particularly
fan mounting and bearing fasteners Refer to Torque chart.
3.
Inspect belt tension and pulley alignment. Refer to Belt and
Pulley Installation.
4.
Inspect motor wiring. Refer to Wiring Installation.
5.
Ensure belt touches only the pulleys.
6.
Rotate the wheel to ensure it rotates freely.
7.
Ensure fan and ductwork are clean and free of debris.
8.
Close and secure all access doors.
9.
Restore power to fan.
Start-Up
Turn on the fan. In variable speed units, set fan to its low-
est speed and inspect for the following:
• Direction of rotation
• Excessive vibration
• Unusual noise
• Bearing noise
• Improper belt alignment or tension (listen for squealing)
• Improper motor amperage or voltage
NOTICE! If a problem is discovered, immediately shut
off the fan. Lock out all electrical power and check for
the cause of the trouble. Refer to Troubleshooting.
Inspection
Inspection of the fan should be conducted at the first 30
minute, 8 hour and 24 hour intervals of satisfactory op-
eration. During the inspections, stop the fan and inspect
as per the Conditions Chart.
30 Minute Interval
Inspect bolts, setscrews and motor mounting bolts. Ad-
just and tighten as necessary.
8 Hour Interval
Inspect belt alignment and tension. Adjust and tighten
as necessary.
24 Hour Interval
Inspect belt tension. Adjust and tighten as necessary.
Recommended Torque for Setscrews/Bolts (IN-LB)
Setscrews
Key Hex
Size
Across
Flats
#8
5/64"
GAP
#10
3/32"
1/4
1/8"
5/16
5/32"
3/8
3/16"
7/16
7/32"
1/2
1/4"
5/8
5/16"
3/4
3/8"
7/8
1/2"
1
9/16"
3
Hold Down Bolts
Recommended
Torque
Size
Min.
Max.
15
21
3/8"-16
27
33
1/2"-13
70
80
5/8"-11
140
160
3/4"-10
250
290
7/8"-9
355
405
1"-8
560
640
1-1/8"-7
1120
1280
1-1/4"-7
1680
1920
-
4200
4800
-
5600
6400
-
Recommended
Torque
324
780
1440
2400
1920
2700
4200
6000
-
-
-
B51002-002