COOK VCR - Manual (Page 2)

2
b. Minimum exhaust velocity in the duct should be 1500
FPM in accordance with NFPA 96.
c. If the fan is installed on a surface that is not level, install
the fan in a position that places the drain tube at the
lowest position.
d. Secure the fan to the roof curb at all four corners using
a minimum of four anchor bolts, lag screws or other
suitable fastener.
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 name-
plate. Refer to the following Wiring Diagrams.
Upblast units have two wiring conduits. The vertical con-
duit comes plugged. The horizontal conduit is directly above
vertical conduit.
Lock off all power sources before the fan is wired to power
source.
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).
Fan With a Junction Box
a. Wire the motor using the junction box located on the
outside of the fan.
b. Reinstall the junction box cover and ensure that the
gasket forms a complete seal.
Fan Without a Junction Box
A field wiring compartment must be installed for wire con-
nections. Wire the motor by pulling the electrical wire
through the conduit. For further information refer to the
National Electrical Code and the wiring diagram provided on
the motor.
Single Speed, Single Phase Motor
All wires must be protected from abrasion when
passing through the opening of a field wiring
compartment.
Do not use cooling tubes for electrical connections.
Do not use vertical conduit if fan will be used in a
grease and/or heat exhaust application, use of the
vertical conduit does not conform to NFPA 96 and UL
762.
Failure to follow these instructions could result in
death or serious injury.
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.
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 con-
nection. ** A transformer may be provided in some installations to correct the damper
motor voltage to the specified voltage.
VCRD with Shade Pole or PSC Motors
White Line
Black Line
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
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.