COOK SQN - Manual (Page 4)

4
SQN Optional Side Discharge Installation
Upon receiving a SQN for a side discharge installation,
please note that the rear discharge block-off panel is
installed on the unit and that the correct number of side dis-
charge duct connection collars are provided (4 steel
flanges for a single side discharge and 8 for dual).
To install the side discharge duct connection collar,
remove the appropriate access door. Install the side dis-
charge duct connection collar using the bolts that were
removed with the access door. Then connect the duct work.
See page 5 for examples.
NOTICE! Original Loren Cook Company labels must
remain with the unit. This may require swapping
access doors from one side to the other.
Final Installation Steps
a. Ensure that all accessories are installed.
b. Ensure that the blower is secured to ductwork.
c. Inspect wheel-to-inlet clearance. Ensure wheel does
not rub against the inlet.
d. Test the fan to ensure the rotation of the wheel is the
same as indicated by the rotation label.
e. Inspect for correct amperage with an ammeter and
correct voltage with a voltmeter.
NOTICE! Do not allow the fan to run in the wrong
direction. This will overheat the motor and cause seri-
ous damage. For 3-phase motors, if the fan is running
in the wrong direction, check the control switch. It is
possible to interchange two leads at this location so
that the fan is operating in the correct direction.
Operation
Pre-Start Checks
a. Lock out all the primary and secondary power
sources.
b. Inspect and tighten fasteners and setscrews, particu-
larly fan mounting and bearing fasteners. Refer to
Torque chart.
c. Inspect belt tension and pulley alignment.
d. Inspect motor wiring.
e. Ensure fan and ductwork are clean and free of
debris.
f. Close and secure all access doors.
g. Restore power to the fan.
Side Discharge
Duct Connection
Collar Rear Discharge
Block-off Panel Start Up
Turn the fan on. In variable speed units, set the fan to its
lowest speed and inspect for the following:
• Direction of rotation.
• Excessive vibration.
• Unusual noise.
• Bearing noise.
• Improper belt alignment or tension (listen for squeal-
ing).
• Improper motor amperage or voltage.
NOTICE! If a problem is discovered, immediately shut
the fan off. Lock out all electrical power and check for
the cause of the trouble. See Troubleshooting on page
7.
Inspection
Inspection of the fan should be conducted at the first 30
minute, 8 hour and 24 hour intervals of satisfactory opera-
tion. During the inspections, stop the fan and inspect as per
the chart below.
30 Minute Interval
Inspect bolts, setscrews, and motor mounting bolts.
Adjust 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.
Maintenance
Establish a schedule for inspecting all parts of the fan.
The frequency of inspection depends on the operating con-
ditions and location of the fan.
Inspect fans exhausting corrosive or contaminated air
within the first month of operation. Fans exhausting con-
taminated air (airborne abrasives) should be inspected
every three months.
Yearly inspections are recommended for fans exhausting
non-contaminated air.
It is recommended the following inspections be con-
ducted twice per year.
• Inspect bolts and setscrews for tightness. Tighten as
necessary. Refer to 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.
Recommended Torque for Setscrews/Bolts (IN/LB.)
Setscrews
Hold Down Bolts
Size
Key Hex
Across
Flats
Recommended
Torque
Min. Max. Size
Wrench
Torque
No.10 3/32” 28 33 3/8”-16 240
1/4” 1/8” 66 80 1/2”-13 600
5/16” 5/32” 126 156 5/8”-11 1200
3/8” 3/16” 228 275 3/4”-10 2100
7/16” 7/32” 348 384 7/8”-9 2040
1/2” 1/4” 504 600 1”-8 3000
5/8” 5/16” 1104 1200 1-1/8”-7 4200
3/4” 3/8” 1440 1800 1-1/4”-7 6000