Loren Cook VCR Installation Manual
VCR
Centrifugal Roof and Wall Exhausters
INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
This publication contains the installation, operation
and maintenance procedures for standard units of the
VCR/VCRD/VCR-HP/VCRD-HP/VCR-XP/VCRD-XP Centrifugal Roof and Wall Exhausters. Carefully read
this publication prior to installation or maintenance
procedure.
Loren Cook catalog, VCR, 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.
Receiving and Inspection
Immediately upon receipt of a VCR 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 lifting lugs
provided under top cap. Never lift
by the shaft, motor or housing.
1-1/16 inch diameter drain hole should be inserted on the
bottom side of the unit for drainage.
Personal Safety
Disconnect switches are recommende d. Place
the disconnect switch 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.
Fan Installation
a. Ensure the fan discharge is a minimum 40 inches
above the roof surface and a minimum of 10 foot from
any building air intake in order to comply with NFP A 96.
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.
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.
WARNING
This fan has rotating parts. Safety precautions
should be exercised at all times during installation,
operation, and maintenance.
ALWAYS disconnect power prior to working on fan.
Lifting Lugs
Installation
If the fan was delivered with the motor un m ou n ted , se e
the maintenance sections for belt and pulley installation.
If the fan was purchased as a wall mount unit and a
grease terminator or grease trough was not purchased, a
VCR / VCRD
Grease Terminator Installation
WARNING
All wires must be protected from abrasion when
passing through the opening of a field wiring compartment.
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 nameplate. Refer to the Wiring Diagrams, next page.
Do not use cooling tubes for electrical connections.
Upblast units have two wiring conduits . Upblast units have
two wiring conduits. The vertical conduit comes plugged.
The horizontal conduit is dire ctly above vertica l conduit.
! CAUTION ! 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.
Lock off all power sources before the fan is wired to
power source.
Personal Safety
Disconnect switches are recommended. Place
the disconnect switch 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.
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 connections. 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.
PVC
Extension
Lid
Sealing Nut
Terminator
Fan Inlet Side
Sealing Nut
VCR with Terminator
Final Installation Steps
a. Ensure fasteners and setscrews, particularly fan
mounting and bearing fasteners, are tightened according to the recommended torque shown in the table
below, Recommended Torque for Setscrews/Bolts.
b. Inspect for correct voltage with voltmeter.
c. Ensure all accessories are installed.
d. Test the fan to be sure the rotation is the same as indi-
cated by the arrow marked Rotation.
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.
e. Inspect wheel-to-inlet clearance. Wheels may shift in
shipment. To realign wheel-to-inlet, shift u pper be aring
so there is an equal radial clearance between the
wheel and inlet.
Recommended Torque for Setscrews/Bolts (IN/LB.)
Setscrews
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” 29 348 7/8”-9 2040
1/2” 1/4” 42 504 1”-8 3000
5/8” 5/16” 92 1104 1-1/8”-7 4200
3/4” 3/8” 120 1440 1-1/4”-7 6000
Key Hex
Across
Flats
Recommended
Torque
Min. Max. Size
Hold Down Bolts
Wrench
Torque
2
Wiring Diagrams
Single Speed, Single Phase Motor
Ground A
L
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.
1
Line
L
2
Wiring Diagrams
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
1
3 Phase, 9 Lead Motor
Delta-Connection
Low Voltage
208/230 Volts
L
3
8
7
4
6
2
1
L
1
2
2 Speed, 2 Winding, Single Phase Motor 2 Speed, 1 Winding, 3 Phase Motor
Ground A
T-1
T-4
Ground B
When ground required, attach to ground A or B with No. 6 thread forming
screw. To reverse, interchange T-1 and T-4 leads.
High Speed
L
1
L
2
Low Speed
Line
1
Together
2
Motor
3
L
1
4
L
5
2
6
Line
L
3
Motor
To reverse, interchange any 2 line leads. Motors require magnetic control.
Single Speed, Single Phase, Dual Voltage 2 Speed, 2 Winding, 3 Phase
Ground A
L
T-5
J-10
Ground B
Link A
Link B
Low Voltage
Line
L
1
T-5
J-10
2
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.
Ground A
Link A & B
High Voltage
L
1
Line
L
2
T
Low Speed
3
Low Speed
T
2
Low Speed
T
Motor
T
T
T
1
11
12
13
High Speed
High Speed
High Speed
To reverse: High Speed-interchange leads T11 and T12.
Low Speed-interchange leads T
line leads.
and T2. Both Speeds-interchange any 2
1
High Voltage
1
2
3
4
5
6
460 Volts
789
456
12
L1L
L
2
L
1
L
Line
2
L
3
Open
3
3
L
1
L
2
Line
L
3
9
5
3
L
3
Low SpeedHigh Speed
Operation
Pre-Start Checks
a. Lock out all the primary and secondary power sources.
b. Inspect and tighten fasteners and setscrews, particu-
larly fan mounting and bearing fasteners. Refer to
Torque chart.
c. Inspect belt tension and pulley alignment. Refer to Belt
and Pulley Installation, page 5.
d. Inspect motor wiring. Refer to Wiring Installation, page
2.
e. Ensure belt touches only the pulleys.
f. Rotate the wheel to ensure it rotates freely.
g. Ensure fan and ductwork are clean and free of de b ris.
h. Close and secure all access doors.
i. Restore power to fan.
Start Up
Turn the fan on. 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, page 6.
VCRD with Shade Pole or PSC Motors
White Line
Black
VCRD with 2-Speed PSC Motors
White Line
Black (High)
Red (Low)
NOTE: Insulate Unused Lead
FSC - 115 VOLT 10 AMP
VCR
FAN*
FSC
VCR
FAN*
*See VCR Wiring Diagram for correct lead.
†
Locate away from heat.
*
*
WHITE
BLACK
Line
Line
3
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