COOK VCR User Manual
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 and any
supplemental documents prior to any
installation or maintenance procedure.
Loren Cook Company’s VCR catalog 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 on special equipment, contact Loren
Cook Company Customer Service Department at
(417)869-6474.
VCR
Centrifugal Roof and Wall Exhausters
The attachment of roof mounted fans to the roof curb
as well as the attachment of roof curbs to the building
structure must exceed the structural requirements
based on the environmental loading derived from the
applicable building code for the site. The local code
official may require variations from the recognized
code based on local data. The licensed engineer of
record will be responsible for prescribing the correct
attachment based on construction materials, code
requirements and environmental effects specific to
the installation.
Failure to follow these instructions could result in
death or serious injury.
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.
Rotating Parts & Electrical Shock Hazard:
Disconnect electric power before working on unit.
Follow proper lockout / tagout procedures to ensure
the unit cannot be energized while being installed or
serviced.
A disconnect switch should be placed 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.
Grounding is required. All field-installed wiring must
be completed by qualified personnel. All fieldinstalled wiring must comply with National Electric
Code (NFPA 70) and all applicable local codes.
Failure to follow these instructions could result in
death or serious injury.
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.
NOTICE! Never lift by the shaft, motor or housing.
Installation
If the fan was delivered with the
motor unmounted, see 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 1-1/16 inch diameter drain hole should be
inserted on the bottom side of the unit for drainage.
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 NFPA 96.
Lifting Lugs
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.
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.
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 following Wiring Diagrams.
Upblast units have two wiring conduits. The vertical conduit 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 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.
Single Speed, 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.
L
1
Line
L
2
2 Speed, 2 Winding, Single Phase Motor
When ground required,
attach to ground A or B
with No. 6 thread forming
screw. To reverse, inter-
L
1
change T-1 and T-4
Line
leads.
L
2
T-1
T-4
Ground B
Ground A
High Speed
Low Speed
Single Speed, Single Phase, Dual Voltage
Ground A
L
L2L
1
T-5
Line
J-10
L
2
Ground B
3 Phase, 9 Lead Motor
Delta-Connection
Low Voltage
208/230 Volts
7
6
1
3
3
L
1
T-5
J-10
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.
Link A
Link B
Low Voltage
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
12
L
1
Ground A
L
789
456
3
L
2
3
Line
L
1
2
Link A & B
High Voltage
9
8
5
4
3
2
L
3L2
460 Volts
12
L1L
2 Speed, 2 Winding, 3 Phase
To reverse: High Speed-interchange leads T11 and T12.
Low Speed-interchange leads T1 and T2. Both Speeds-interchange any 2 line leads
Typical Damper Motor Schematic
Fan
Motor
Transformer**
Damper
Motor*
For 3 phase, damper motor voltage should be the same between L1 and L2. For single
phase application, disregard L3. *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.
Second
Damper
Motor
L3
L2
L1
Transformer**
VCRD with Shade Pole or PSC Motors
White Line
Black Line
2
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
BLAC
Grease Terminator Installation
PVC
Extension
Lid
Sealing Nut
Terminator
Fan Inlet Side
Sealing Nut
Final Installation Steps
1. 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.
2. Inspect for correct voltage with voltmeter.
3. Ensure all accessories are installed.
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” 348 384 7/8”-9 2040
1/2” 1/4” 504 600 1”-8 3000
5/8” 5/16” 1104 1200 1-1/8”-7 4200
3/4” 3/8” 1440 1800 1-1/4”-7 6000
Key Hex
Across
Flats
Recommended
Torque Inch-lbs.
Min. Max. Size
Hold Down Bolts
Wrench
Torque (inch-lbs)
Line
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 bearing so there is an equal radial clearance between the
wheel and inlet.
Operation
Pre-Start Checks
1. Lock out all the primary and secondary power
sources.
2. Inspect and tighten fasteners and setscrews, particularly fan mounting and bearing fasteners. Refer to
Torque chart.
3. Inspect belt tension and pulley alignment. Refer to
Belt and Pulley Installation, page 5.
4. Inspect motor wiring. Refer to Wiring Installation,
page 2.
5. Ensure belt touches only the pulleys
6. Rotate the wheel to ensure it rotates freely.
7. Ensure fan and ductwork are clean and free of
debris.
8. Close and secure all access doors.
9. 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 squeal-
ing)
• Improper motor amperage or voltage
NOTICE! 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 Trouble-
shooting, page 6.
Inspection
Inspection of the fan should be conducted at the first 30
minute, 8 hour and 24 hour intervals of satisfactory
operation. During the inspections, stop the fan and
inspect as instructed below.
30 Minute Interval
Inspect bolts, setscrews, and motor mounting bolts.
Adjust and tighten as necessary.
8 Hour Interval
Inspect belt alignment and tension. Adjust and tighten
as necessary.
24 Hour Interval
Inspect belt tension. Adjust and tighten as necessary.
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