COOK VCRD Manual de instalação, operação e manutenção - Página 2

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WARNING

All wires must be protected from abrasion when

passing through the opening of a field wiring com-

partment.

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 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 directly above vertical conduit.

! CAUTION ! Do not use vertical conduit if fan will be used

in a grease and/or heat exhaust application, use of the verti-

cal 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 per-

sonnel are provided complete control of the

power source.

Follow the wiring diagram in the disconnect switch

and the wiring diagram provided with the motor. Cor-

rectly 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.

Grease Terminator Installation

PVC

Extension

Lid

Sealing Nut

Terminator

Final Installation Steps

a. Ensure fasteners and setscrews, particularly fan

mounting and bearing fasteners, are tightened accord-

ing 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 dam-

age. For 3-phase motors, if the fan is running in the

wrong direction, check the control switch. It is possi-

ble 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 upper bearing

so there is an equal radial clearance between the

wheel and inlet.

Recommended Torque for Setscrews/Bolts (IN/LB.)

Setscrews

Recommended

Key Hex

Torque

Size

Across

Flats

Min.

No.10

3/32"

1/4"

1/8"

5/16"

5/32"

126

3/8"

3/16"

228

7/16"

7/32"

1/2"

1/4"

5/8"

5/16"

3/4"

3/8"

120

Fan Inlet Side

Sealing Nut

VCR with Terminator

Hold Down Bolts

Wrench

Max.

Size

Torque

3/8"-16

240

1/2"-13

600

156

5/8"-11

1200

275

3/4"-10

2100

348

7/8"-9

2040

504

1"-8

3000

1104

1-1/8"-7

4200

1440

1-1/4"-7

6000