2
ACSC IO&M
B51002-002
Single Speed, Single Phase, Dual Voltage
Ground B
J-10
T-5
Ground A
Link A
Link B
Low Voltage
Line
L 2
L 1
Ground A
Link A
and B
L1
L2
Line
Ground B
T-5
J-10
When ground is required, attach to ground A or B with No. 6 thread
forming screw. To reverse, interchange T-5 and J-10 leads.
3 Phase, 9 Lead Motor
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
To reverse, interchange any two line leads.
2 Speed, 2 Winding, 3 Phase
L
1
T
1
T
2
T
3
Low Speed
Low Speed
Low Speed
High Speed
High Speed
High Speed
Motor
T
13
T
12
T
11
L
2
Line
L
3
To reverse:
High Speed - interchange leads T
11
and T
12
.
Low Speed - interchange leads T
1
and T
2
.
Both Speeds - interchange any two line leads.
Typical Damper Motor Schematic
Fan
Motor
Damper
Motor*
Second
Damper
Motor
Transformer**
Transformer**
L3
L2
L1
For 3-Phase, damper motor voltage should be the same be-
tween L
1
and L
2
. For single phase application, disregard L
3
.
*Damper motors may be available in 115, 230 or 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
requirements.
Installation
If the fan was delivered with the motor unmounted, see
Belt and Pulley Installation
.
Wiring Installation
Leave enough slack in the wiring to allow for motor move-
ment 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. To remove motor,
remove bolts securing motor base to power assembly. Do
not remove motor mounting bolts.
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 setscrews, particularly fan
mounting and bearing fasteners, are tightened ac-
cording to the recommended torque shown in the
Rec-
ommended Torque for Setscrews/Bolts
table, page 3.
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 indi-
cated by the arrow marked
Rotation
.
NOTICE! Do not allow the fan to run in the wrong di-
rection. 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.
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
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, interchange T-1 and T-4.
2 Speed, 2 Winding, Single Phase Motor
Ground A
Ground B
T-1
T-4
Low Speed
High Speed
L1
L2
Line
When ground is required, attach to ground A or B with No. 6 thread
forming screw. To reverse, interchange T-1 and T-4 leads.