Carnes VLBK-06 Installation Manual

FORM 1304-A

INSTALLATION, OPERATING AND MAINTENANCE INSTRUCTIONS

CENTRIFUGAL LOW SILHOUETTE ROOF VENTILATORS

MODELS VL/VT/VK/VJ - BELT AND DIRECT DRIVE

CARNES COMPANY, 448 S. Main St., P. O. Box 930040, Verona, WI.53593-0040 Phone: [phone] Fax: [phone] [e-mail] http://www.carnes.com

CAUTION! DO NOT INSTALL, USE OR OPERATE THIS EQUIPMENT UNTIL THIS

MANUAL HAS BEEN READ AND UNDERSTOOD. READ AND SAVE THESE INSTRUCTIONS FOR

FUTURE USE

RECEIVING, HANDLING AND STORAGE

1. Handle the fan with care.Avoid severe jarring or dropping of the unit.

2. Carefully inspect the unit for damage upon delivery. If the unit has been damaged in transit it is the responsibility

of the recipient to make all claims against the carrier.

3. Provide adequate, protected storage prior to installation.

INSTALLATION

1. Upon unpacking, inspect the unit for any damage that may have occurred in transit. Check also for loose or

missing parts.

2.

CAUTION!

This fan contains rotating parts and requires electrical service. Appropriate safety precautions

should be taken during installation, operation and maintenance.

3.

WARNING!

Do not install or operate this fan in environment or atmosphere where combustible or flammable
materials, gasses or fumes are present, unless it has been specifically designed and manufactured for use in
that environment. Explosion or Fire could result!

4. This ventilator requires a minimum of four (4) mounting fasteners, or the appropriate size and type, in order to
be securely fastened to the roof curb. Be sure to use an approved sealant between the fan and curb to prevent
leaking.

5. A damper, if used, should be securely mounted in a manner which allows free and unobstructed operation. Fan
wiring should not interfere with damper blades.

6.

CAUTION!

All electrical work must be done in accordance with local and/or national electrical code as
applicable.If you are unfamiliar with methods of installing electrical wiring, secure the services of a qualified
electrician.

7.

WARNING!

This product must be grounded.

8.

DANGER!

Make sure power is turned off and locked in OFF position at the ser vice entrance before

installing, wiring or servicing fan.

9.

CAUTION!

Before wiring the motor, check the supply voltage against the motor nameplate voltage. High

or low voltage can damage the motor and void the motor warranty.

10. Power should be routed through the conduit openings provided.

11. Access to the motor is possible by removing the housing cover.

12.

WARNING!

Be sure to keep all wiring clear of rotating or moving parts.

13.

WARNING!

Before starting the fan, turn the wheel to assure it rotates freely. If needed, adjust the wheel/shaft/

bearing/motor position as required to achieve necessary clearances.

14.

CAUTION!

On belt drive units assure belts are tensioned and aligned properly. (See Maintenance section).

15.

WARNING!

Check all fasteners and keys, tighten as necessary to fan startup. Do not over torque.

16. Remount housing cover, do not over torque fasteners (30in.-lb. maximum).

FORM 1304-A, Page 1

OPERATION

1.

CAUTION!

Check that the fan inlet/ductwork/exhaust openings are clean and free of obstructions. Poor inlet

conditions will result in seriously reduced fan performance.

2.

WARNING!

This fan contains rotating parts. Appropriate safety precautions should be taken during operation.

3. Operate under power and check for correct wheel rotation direction (clockwise when looking at top of the wheel).

4.

CAUTION!

Incorrect rotation can damage the fan motor and seriously impede fan performance.

MAINTENANCE

1.

DANGER!

Before performing any maintenance on the fan, be sure power is turned off and locked in the OFF

position at the service entrance before servicing the fan.

2. Ventilators should be carefully checked at least once a year.For critical or rugged applications, a routine check
every two or three months is suggested.

3. All motors supplied with CARNES ventilators carry a one year warranty from date of shipment.For repairs within
the warranty period, the motor must be taken to the motor manufacturer’s authorized service dealer. Contact your
local CARNES representative for additional warranty details.

4. Access to the motor is possible by removing the housing cover.

5. A periodic motor check should consist of spinning the motor shaft with the power off to be sure the motor turns

freely and the bearings run smoothly.The belt on belt driven units should be removed from the motor sheave.

6.

CAUTION!

When removing or installing a belt, do not force the belt over the sheave. Loosen the motor mount

so that the belt can be easily slipped over the sheave.

7. The belt on belt driven units should be removed and carefully checked for radial cracks, ply separation or irregular
wear.A small irregularity in the contact surface of the belt will result in noisy operation. If any of these defects are
apparent, the belt should be replaced. Check the sheaves also for chipping, dents or rough surfaces which could
damage the belt.

8.

CAUTION!

The correct belt tension is important. Too tight a belt will result in excess bearing pressure on the
motor bearings and shaft pillow blocks, and may also overload the motor.Too loose a belt will result in slippage
which will quickly “burn” out belts. A belt should feel “live” when thumped, approximately 1/4” belt deflection when
subjected to finger pressure (3 to 5 lbs.) at midpoint between sheaves.

9.

CAUTION!

The belt alignment should also be checked to be sure the belt is running perpendicular to the rotating
shafts. Motor and drive shafts must be parallel. Improper alignment will result in excessive belt wear.

10.

CAUTION!

Check sheave set screws to ensure tightness. Proper keys must be in keyways.

11.

CAUTION!

Do not readjust variable pitch sheave without checking motor amps.Do not readjust variable pitch
sheaves above the maximum catalog RPM for unit and motor. If fixed sheave are replaced, use only sheaves of
identical size and type.

12.

CAUTION!

If adjustment of two groove var iable pitch sheaves is required, each sheave must be opened or closed
at the same number of turns. Improper adjustment can cause excessive belt wear and premature failure.

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13. If unit is to be left idle for an extended period (especially over summer months), it is recommended that belts
be removed and stored in a cool, dry place to avoid premature belt failure.

14. The standard pillow block bearings on CARNES belt driven ventilators are per manently lubr icated and are
supplied with an oil base corrosion preventive compound. These should not require any ser vice, except that
during the first few months of operation it is recommended that set screws holding the shaft be checked to be
sure they are tight. (Proper tightness will permanently deform Allen wrench.)

15. The centrifugal wheel should not require maintenance except for removing foreign mater ials that may accumulate
on the blades.The balance weights should not be disturbed.If a wheel has to be removed from the shaft, do not
apply force that will damage the bearings or warp the wheel. Use a wheel puller.

16. Access to the wheel for alignment purposes can be obtained by removing the housing lid.Lateral adjustment
is made with the bearing mount.Vertical adjustment is made at the bearings.

17. Should it be necessary to remove the wheel, access is through the fan plate.Do not remove the motor/motor
mount assembly. Carefully support the motor/motor mount assembly and remove all the fan plate fasteners.
Carefully remove the entire assembly from the unit base.To rebuild, assemble in reverse order.

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