Wiring Installation; Wiring Diagrams - COOK TMX Installation, Operation And Maintenance Manual

Wiring Installation

NOTICE! Lock off all power sources before unit is
wired to power source.
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).
Use of Variable Frequency Drives
Motors
Motors that are to be operated using a Variable Fre-
quency Drive (VFD) must be VFD compatible. At a mini-
mum, this must be a Premium Efficiency motor with Class
F insulation. Motors that are not supplied by Loren Cook
Company should have the recommendation of the motor
manufacturer for use with a VFD.
Grounding
The fan frame, motor and VFD must be connected to a
common earth ground to prevent transient voltages from
damaging rotating elements.
Wiring
Line reactors may be required to reduce over-voltage
spikes in the motors. The motor manufacturer should be
consulted for recommended line impedance and usage of
line reactors or filters if the lead length between the VFD
and the motor exceeds 10 ft (3m).
Fan
It is the responsibility of the installing body to perform
coast-down tests and identify any resonant frequencies
after the equipment is fully installed. These resonant fre-
quencies are to be removed from the operating range of
the fan by using the "skip frequency" function in the VFD
programming. Failure to remove resonant frequencies
from the operating range will decrease the operating life of
the fan and void the warranty.

Wiring Diagrams

Vari-Flow
For EC or VF see EC Motor Wiring supplement. For VF2 see
PM wiring supplement.
Single Speed, Single Phase Motor
T-1
T-4
Ground B
When ground is required, attach to ground A or B with No.
6 thread forming screw. To reverse, interchange T-1 and
T-4.
TMX IO&M
Ground A
L 1
Line
L 2
2 Speed, 2 Winding, 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, interchange T-1 and
T-4 leads.
Single Speed, Single Phase, Dual Voltage
Ground A
L 1
Link A
T-5
Link B
J-10 Low Voltage
L 2
Ground B
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
3 Phase, 9 Lead Motor
Y-Connection
Low Voltage High Voltage
208/230 Volts 460 Volts
4 5 6
4 5 6
7 8 9
1 2 3
3
1 2
9
7 8
L 1 L 2 L 3 L 1 L 2 L 3
To reverse, interchange any 2 line leads.
2 Speed, 1 Winding, 3 Phase Motor
High Speed
1
Together
2
3
Motor
L 1
4
L 2
5
Line
6 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
1
Motor
High Speed
T
11
High Speed
T
12
High Speed
T
13
To reverse:
High Speed - interchange leads T
Low Speed - interchange leads T
Both Speeds - interchange any 2 line leads.
4
High Speed
L 1
Line
L 2
Low Speed
Ground A
L 1
Link A
and B
T-5
Line
J-10
L 2
Ground B
3 Phase, 9 Lead Motor
Delta-Connection
Low Voltage High Voltage
208/230 Volts 460 Volts
8 9
7 7 8 9
6 4 5
2 3
1
1 2
L 1 L 2 L 3
L 1
Low Speed
1
2
3
Motor
4
5
6
and T .
11 12
and T .
1 2
B51108-003
Line
4 5 6
3
L 2 L 3
L 1
L 2
Line
L 3
Open
L
1
L
Line
2
L
3