COOK ACSC - Manual (Page 2)

2
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 connec-
tion with the terminal box at the end of the motor.
NOTICE! Follow the wiring diagram in the discon-
nect 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 bear-
ing so there is an equal radial clearance between the
wheel and inlet.
Wiring Diagrams
Single Speed, Single Phase Motor
2 Speed, 2 Winding, Single Phase Motor
Single Speed, Single Phase, Dual Voltage
When ground required, attach to ground A or B with No. 6 thread forming screw.
To reverse, interchange T-5 and J-10 leads.
When ground required,
attach to ground A or B
with No. 6 thread forming
screw. To reverse, inter-
change T-1 and T-4
leads. Ground A
Ground B
T-1
T-4
Low Speed
High Speed
L 1
L 2
Line
Ground B
J-10
T-5
Ground A
Link A
Link B
Low Voltage
Line
L 2
L 1
Ground A
Link A & B
L1
L 2
Line
Ground B
T-5
J-10
To reverse, interchange any 2 line leads.
2 Speed, 2 Winding, 3 Phase
To reverse: High Speed-interchange leads T
11
and T
12
.
Low Speed-interchange leads T
1
and T
2
. Both Speeds-interchange any 2 line
leads
Typical Damper Motor Schematic
For 3 phase, damper motor voltage should be the same between L
1
and
L
2
. For single phase application, disregard L
3
. *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.
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.
4 5 6
1
7
2
8 3
9
L1 L2 L3
4 5 6
7 8 9
1 2 3
L1 L2 L3
Low Voltage
208/230 Volts
High Voltage
460 Volts
3 Phase, 9 Lead Motor
Y-Connection
7
1
6
7 8 9
4 5 6
1 2 3
Low Voltage
208/230 Volts
High Voltage
460 Volts
8
2
4
9
3
5
L1 L3 L2
L1 L3 L2
3 Phase, 9 Lead Motor
Delta-Connection
Fan
Motor
Damper
Motor*
Second
Damper
Motor
Transformer** Transformer**
L3
L2
L1
T-1
T-4
Ground B
L 2
L1
Ground A
Line
When ground is required, attach to ground A or B
with no. 6 thread forming screw. To reverse, in-
terchange T-1 and T-4.