Loren Cook ACSC Installation Manual
ACSC
Smoke Control Ventilator
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
This publication contains the installation, operation and mainte-
nance instructions for standard units of the ACSC-Smoke Control
Ventilator .
• ACSC/ACSC-HP/ACSC-XP
Carefully read this publication prior to any installation or main-
tenance procedure.
Loren Cook catalog, AC , provides additional information describing
the equipment, fan performance, available accessories, and specifica-
tion data.
For additional safety information, refer to AMCA publication 410-96,
Safety Practices for Users and Installers of Industrial and Commercial
Fans .
All of the publications listed above can be obtained from Loren Cook
Company by phoning (417)869-6474, extension 166; by FAX at
(417)832-9431; or by e-mail at info@lorencook.com.
For information and instructions on special equipment, contact Loren
Cook Company at (417)869-6474.
Receiving and Inspection
Immediately upon receipt of an AC fan, carefully inspect the fan and
accessories for damage and shortage.
• Turn the wheel by hand to ensure it turns freely and does not bind.
• Record on the Delivery Receipt any visible sign of damage.
Handling
Lift the fan by the shipping carton or lifting lugs
provided under top cap. Never lift by the shaft,
motor or housing.
Storage
If the fan is stored for any length of time prior
to installation, store it in its original shipping crate
and protect it from dust, debris and the weather.
Damper
Use of any backdraft dampers is NOT permitted. Fire dampers and/or smoke dampers may be required in a smoke
control system. These dampers must meet the requirements determined by the local code authority.
WARNING
This unit has rotating parts. Safety precautions should be exercised at all times during installation, operation, and maintenance.
ALWAYS disconnect power prior to working on fan.
Installation
If the fan was delivered with the motor unmounted, see the mainte-
nance section for belt and pulley installation.
Wiring Installation
All wiring should be in accordance with local ordinances and the
National Electrical Code, NFPA 70. Ensure the power supply (voltage,
frequency, and current carrying capacity of wires) is in accordance with
the motor nameplate. Refer to the Wiring Diagrams , next page.
Lock off all power sources before the fan is wired to power
source.
Leave enough slack in the wiring to allow for motor movement when
adjusting belt tension. Some fractional motors have to be removed in
order to make the connection with the terminal box at the end of the
motor.
Personal Safety
Disconnect switches are recommended. Place the disconnect
switch near the fan in order that the power can be swiftly cut off in
case of an emergency, and in order that maintenance personnel are
provided complete control of the power source.
Follow the wiring diagram in the disconnect switch and the wiring diagram provided with the motor. Correctly label the circuit on
the main power box and always identify a closed switch to promote
safety (i.e., red tape over a closed switch).
Final Installation Steps
a. Ensure fasteners and set screws, particularly fan mounting and
bearing fasteners are tightened according to the recommended
Lifting Lugs
torque shown in the table on page 2, Recommended Torque for
Setscrews/Bolts.
b. Inspect for correct amperage with an ammeter and correct voltage
with a voltmeter.
c. Ensure that all accessories are installed.
d. Test the fan to be sure the rotation is the same as indicated by the
arrow marked Rotation .
Do not allow the fan to run in the wrong direction. This will overheat the motor and cause serious 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.
e. Inspect wheel-to-inlet clearance. Wheels may shift in shipment. To
realign wheel-to-inlet, shift upper bearing so there is an equal
radial clearance between the wheel and inlet.
Maintenance
Establish a schedule for inspecting all parts of the fan. The frequency
of inspection depends on the operating conditions and location of the
fan.
ACSC fan is intended for general ventilation, and is UL listed for
Smoke Control Systems. The fan should not be used to exhaust corrosive or contaminated air.
Regular, twice per year, inspections are recommended and may be
required per local codes.
Contact the local code authority for inspection requirements.
• 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 Installa-
tion, page 3.
• 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.
Operation
Pre-Start Checks
a. Lock out all the primary and secondary power sources.
b. Inspect and tighten fasteners and setscrews, particularly fan
mounting and bearing fasteners Refer to Torque chart .
c. Inspect belt tension and pulley alignment. Refer to Belt and Pulley
Installation , page 3.
d. Inspect motor wiring. Refer to Wiring Installation .
e. Ensure belt touches only the pulleys.
f. Rotate the wheel to ensure it rotates freely.
g. Ensure fan and ductwork are clean and free of debris.
h. Close and secure all access doors.
i. Restore power to fan.
ACSC
2
e
Wiring Diagrams
Single Speed, Single Phase Motor
Ground A
T-1
T-4
Ground B
When ground is required, attach
to ground A or B with no. 6 thread
forming screw. To reverse, inter-
L
change T-1 and T-4.
1
Line
L
2
2 Speed, 2 Winding, Single Phase Motor
Ground A
T-1
T-4
Ground B
When ground required, attach to ground A or B with No. 6 thread forming screw. To
reverse, interchange T-1 and T-4 leads.
High Speed
Low Speed
L
1
Line
L
2
Single Speed, Single Phase, Dual Voltage
Ground A
L
Line
L
1
T-5
J-10
2
Ground B
T-5
J-10
Ground B
When ground required, attach to ground A or B with No. 6 thread forming
screw. To reverse, interchange T-5 and J-10 leads.
Link A
Link B
Low Voltage
Ground A
Link A & B
L
Line
L
1
2
Start-up
Turn on the fan. In variable speed units, set the fan to its lowest
speed. 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
If a problem is discovered, immediately shut the fan off. Lock out
all electrical power and check for the cause of the trouble. Refer to
Troubleshooting on page 4.
Inspection
Inspection of the fan should be conducted at the first 30 minute , 8
hour and 24 hour intervals of satisfactory operation. During the inspec-
tions, stop the fan and inspect as instructed.
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.
Recommended Torque for Setscrews/Bolts (IN/LB)
Size
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” 29 348 7/8”-9 2040
1/2” 1/4” 42 504
5/8” 5/16” 92 1104
3/4” 3/8” 120 1440
Setscrews
Key Hex
Across
Flats
Recommended
Min. Max. Size
Hold Down Bolts
Wrench
Torque
3 Phase, 9 Lead Motor
Y-Connection
Low Voltage
208/230 Volts
4
5
6
3
1
9
728
L2L
L
1
3
High Voltage
460 Volts
456
789
12
L
1
3
L2L
3
3 Phase, 9 Lead Motor
Delta-Connection
Low Voltage
208/230 Volts
8
7
4
6
2
1
L
L
1
2
L
3
9
5
3
High Voltage
460 Volts
789
456
12
L1L
3
L
3
2
To reverse, interchange any 2 line leads.
2 Speed, 1 Winding, 3 Phase Motor
Motor
Low Speed
1
2
3
4
5
6
L
1
L
2
L
3
Open
Lin
High Speed
1
Together
2
Motor
3
L
4
1
L
5
2
6
Line
L
3
To reverse, interchange any 2 line leads. Motors require magnetic control.
2 Speed, 2 Winding, 3 Phase
Low Speed
T
3
Low Speed
T
2
Low Speed
T
Motor
To reverse: High Speed-interchange leads T
Low Speed-interchange leads T
line leads.
1
High Speed
T
11
High Speed
T
12
High Speed
T
13
and T
. Both Speeds-interchange any 2
1
2
11
and T
.
12
L
1
Line
L
2
L
3
Lubricants
Loren Cook Company uses petroleum lubricant in a lithium base conforming to NLGI grade 2 consistency. Other grades of grease should not
be used unless the bearings and lines have been flushed clean. If
another grade of grease is used, it should be lithium-based.
A NLGI grade 2 grease is a light viscosity, low-torque, rust-inhibiting
lubricant that is water resistant. Its temperature range is from -30˚F to
+200˚F and capable of intermittent highs of +250˚ F.
Motor Bearings
Motor bearings are pre-lubricated and sealed. Under normal conditions they will not require further maintenance for a period of ten years.
However, it is advisable to have your maintenance department remove
and disassemble the motor, and lubricate the bearings after three years
of operation in excessive heat or in a contaminated airstream consisting
of airborne abrasives.
Fan Bearings
Fan bearings are lubricated through a grease connector and should
be lubricated by the schedule, Conditions Chart.
For best results, lubricate the bearing while the fan is rotating. Slowly
pump grease into the bearing until a slight bead forms around the bearing seals. Excessive grease can burst seals thus reduce bearing life.
In the event the bearing cannot be seen, use no more than three injections with a hand-operated grease gun.
Conditions Chart
RPM Temperature Fan Status Greasing Interval
100 Up to 120˚F Clean 6 to 12 months
500 Up to 150˚F Clean 2 to 6 months
1000 Up to 210˚F Clean 2 weeks to 2 months
1500 Over 210˚F Clean Weekly
Any
Speed
Any
Speed
Any
Speed
Any
Speed
Up to 150˚F Dirty 1 week to 1 month
Over 150˚F Dirty Daily to 2 weeks
Any Temperature Very Dirty Daily to 2 weeks
Any Temperature
Extreme
Conditions
Daily to 2 weeks
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