COOK ACSC User Manual
ACSC
Smoke Control Ventilator
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
This publication contains the installation, operation and
maintenance instructions for standard units of the ACSC
Smoke Control Ventilator.
• ACSC / ACSC-HP / ACSC-XP
Carefully read this publication and any
supplemental documents prior to any installation
or maintenance procedure.
Loren Cook Company’s AC catalog provides additional information describing the equipment, fan performance, available
accessories, and specification 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.
Rotating Parts & Electrical Shock Hazard:
Disconnect electric power before working on unit.
Follow proper lockout / tagout procedures to ensure
the unit cannot be energized while being installed or
serviced.
A disconnect switch should be placed 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.
Grounding is required. All field-installed wiring must
be completed by qualified personnel. All fieldinstalled wiring must comply with National Electric
Code (NFPA 70) and all applicable local codes.
Failure to follow these instructions could result in
death or serious injury.
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.
Installation
If the fan was delivered with the motor unmounted, see
the maintenance section for belt and pulley installation.
The attachment of roof mounted fans to the roof
curb as well as the attachment of roof curbs to the
building structure must exceed the structural
requirements based on the environmental loading
derived from the applicable building code for the
site. The local code official may require variations
from the recognized code based on local data. The
licensed engineer of record will be responsible for
prescribing the correct attachment based on
construction materials, code requirements and
environmental effects specific to the installation.
Failure to follow these instructions could result in
death or serious injury.
Wiring
NOTICE! 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.
(See nextpage for diagram)
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. NOTICE! Never lift by the shaft, motor or
housing.
Lifting Lugs
ACSC
Leave enough slack in the wiring to allow for motor
T
T
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.
NOTICE! 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
1. Ensure fasteners and set screws, particularly fan
mounting and bearing fasteners are tightened
according to the recommended torque shown in the
table on page 2, Recommended Torque for Set-
screws/Bolts.
2. Inspect for correct amperage with an ammeter and
correct voltage with a voltmeter.
3. Ensure that all accessories are installed.
4. Test the fan to be sure the rotation is the same as
indicated by the arrow marked ‘Rotation’.
NOTICE! 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.
5. 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.
Wiring Diagrams
Single Speed, Single Phase Motor
Ground A
T-1
T-4
Ground B
2 Speed, 2 Winding, Single Phase Motor
Ground A
-1
-4
Ground B
Single Speed, Single Phase, Dual Voltage
Ground A
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
When ground is required, attach to ground A or B
with no. 6 thread forming screw. To reverse, interchange T-1 and T-4.
L
1
Line
L
2
When ground required,
attach to ground A or B
with No. 6 thread forming
screw. To reverse, inter-
L
1
change T-1 and T-4
Line
leads.
L
2
Ground A
Link A & B
L
Line
L
High Speed
Low Speed
1
T-5
J-10
2
Ground B
L
Line
L
1
2
3 Phase, 9 Lead Motor
Y-Connection
Low Voltage
208/230 Volts
4
5
6
3
1
9
728
L2L
L
1
To reverse, interchange any 2 line leads.
3
High Voltage
460 Volts
456
789
3
12
L2L
L
3
1
3 Phase, 9 Lead Motor
Delta-Connection
Low Voltage
208/230 Volts
8
7
4
6
2
1
L
L
1
2
L
9
5
3
3
High Voltage
460 Volts
789
456
12
L1L
3
L
3
2
2 Speed, 2 Winding, 3 Phase
To reverse: High Speed-interchange leads T11 and T12.
Low Speed-interchange leads T
leads
and T2. Both Speeds-interchange any 2 line
1
Typical Damper Motor Schematic
Fan
Motor
Transformer**
Damper
Motor*
Second
Damper
Motor
For 3 phase, damper motor voltage should be the same between L1 and
L2. For single phase application, disregard L3. *Damper motors may be
available in 115, 230 and 460 volt models. The damper motor nameplate
voltage should be verified prior to connection. ** A transformer may be
provided in some installations to correct the damper motor voltage to the
specified voltage.
L3
L2
L1
Transformer**
Routine Inspection
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 require-
ments.
• 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, 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.
2
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, page 3.
d. Inspect motor wiring. Refer to Wiring Installation.
4. Ensure belt touches only the pulleys.
5. Rotate the wheel to ensure it rotates freely.
6. Ensure fan and ductwork are clean and free of debris.
7. Close and secure all access doors.
8. Restore power to fan.
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 5.
Inspection
Inspection of the fan should be conducted at the first 30
minute, 8 hour and 24 hour intervals of satisfactory operation. During the inspections, 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)
Setscrews
Recommended
Key Hex
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” 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
Across
Flats
Torque Inch-lbs.
Min. Max. Size
Hold Down Bolts
Wrench
Torque (inch-
lbs)
Maintenance
Fan Bearings
NOTICE! The fan bearings are provided
prelubricated. Any specialized lubrication instructions
on fan labels supersedes information provided herein.
Bearing grease is a petroleum lubricant in a lithium
base conforming to a NLGI #2 consistency. If user
desires to utilize another type of lubricant, they take
responsibility for flushing bearings and lines, and
maintaining a lubricant that is compatible with the
installation.
A NLGI #2 grease is a light viscosity, low-torque, rustinhibiting lubricant that is water resistant. Its temperature
range is from -30°F to 200°F and capable of intermittent
highs of 250°F.
Conditions Chart
RPM Temp °F Greasing Interval
Up to 1000
1000 to 3000
Over 3000
Any Speed < -30 Consult Factory
Any Speed > 200 1 week
For moist or otherwise contaminated installations; divide the interval by
a factor of 3. For vertical shaft installations divide the interval by a factor
of 2.
-30 to 120 6 months
120 to 200 2 months
-30 to 120 3 months
120 to 200 1 month
-30 to 120 1 month
120 to 200 2 weeks
Bearings should be relubricated in accordance with the
condition chart above.
For best results, lubricate the bearing while the fan is in
operation. Pump grease in slowly until a slight bead forms
around the bearing seals. Excessive grease can damage
seal and reduce life through excess contamination and/or
loss of lubricant.
In the event that the bearing cannot be seen, use no
more than three injections with a hand operated grease
gun.
Motor Bearings
Motors are provided with prelubricated bearings. Any
lubrication instructions shown on the motor nameplate
supersede instructions below.
Motor bearings without provisions for relubrication will
operate up to 10 years under normal conditions with no
maintenance. In severe applications, high temperatures or
excessive contaminates, it is advisable to have the
maintenance department disassemble and lubricate the
bearings after 3 years of operation to prevent interruption
of service. For motors with provisions for relubrication,
follow intervals of the table below.
Relubrication Intervals
Service
Conditions
Standard 3 yrs. 6 months 2 yrs. 6 months 1 yr. 3 months
Severe 1 yr. 3 months 1 yr. 3 months 6 months 1 months
Up to and
including 184T
1800 RPM
and less
Over 1800
RPM
NOTICE! Motors are provided with a polyurea
mineral oil NGLI #2 grease. All additions to the motor
bearings are to be with a compatible grease such as
Exxon Mobil Polyrex EM and Chevron SRI.
The above intervals should be reduced to half for vertical
shaft installations.
NEMA Frame Size
213T-365T 404T and larger
1800 RPM
and less
Over 1800
RPM
1800 RPM
and less
Over 1800
RPM
3
Loading...