Express VMBL Series Assembly instructions

INSTALLATION, OPERATING AND MAINTENANCE INSTRUCTIONS
MIXED FLOW FANS
MODEL VMBL — BELT DRIVE
CAUTION!
DO NOT INSTALL, USE OR OPERATE THIS EQUIPMENT UNTIL THIS MANUAL HAS
BEEN READ AND UNDERSTOOD. READ AND SAVE THESE SHEETS 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 an 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 is designed for floor or ceiling suspended mounting.
5. Attach the spring or R-I-S isolators to the mounting brackets. Be sure all fasteners are securely tightened.
6. Join the fan to the duct using any suitable flexible connector. Flexible connectors should overlap the fan and duct
sufficiently to assure against leaks.
7. 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.
8. WARNING! This product must be grounded.
9. DANGER! Make sure power is turned off and locked in OFF position at the service entrance before installing,
wiring or servicing fan.
10. 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 warranty.
11. WARNING! Be sure to keep all wiring clear of rotating or moving parts.
12. 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.
13. CAUTION! On belt drive units assure belts are tensioned and aligned properly. (See Maintenance section).
14. WARNING! Check all set screws and keys, tighten as necessary prior to fan start up. Anchor the fan securely
using optional mounting brackets and suitable fasteners or other suitable means prior to operation.
15. Anchor the fan securely using optional mounting brackets and suitable fasteners or other suitable means prior to
operation. (Refer to IO&M #1404).
FORM ASX-1409
FORM ASX-1409, Page 1
Air Specialties Express, 448 S. Main St., P. O. Box 930040, Verona, WI 53593-0040 Phone: [phone] Fax: [phone] www.airspecialties.com

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 operation.
MAINTENANCE
1. DANGER! Before performing and 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
CARNES representative for additional warranty details.
4. Access to the motor compartment is possible by removing the motor cover or motor cover/motor tube assembly.
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 sheave 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 sheaves are replaced, use only sheaves of
identical size and type.
12. CAUTION! If adjustment of two groove variable pitch sheaves is required, each sheave must be opened or
closed the same number of turns. Improper adjustment can cause excessive belt wear and premature failure.
2

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 permanently lubricated and are supplied
with an oil base corrosion preventive compound. These should not require any service except that during the first
few months of operation it is recommended the set screws holding the shaft be checked to be sure they are tight.
(Proper tightness will permanently deform Allen wrench.)
15. The centrifugal fan when should not require maintenance except for removing foreign materials that may accumu-
late 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 motor lid and/or motor tube. Lateral
adjustment is made with the motor 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 removed the entire assembly from the unit base. To rebuild, assemble in reverse order.
3
Safe installation and operation of fans is the responsibility of those who design, install, maintain and use
the equipment. For general guidelines and safety recommendations, please refer to AMCA Publication
410-96. “Recommended Safety Practices for Users and Installers of Industrial and Commercial Fans.”
(Contact your local Carnes Representative for your free copy.)
N-D1
M-D2
Model Wheel 1 2 3 A C D E F N D1 M D2 H (Max) Weight (lb)
12 15.75 18 19 21 24 23 22 19 16 8 0 4 1 39 130
15 17.75 20 22 23 28 27 25 21 18 12 0 4 1 42 157
16 19.75 22 24 25 29 28 26 23 19 12 0 4 1 46 201
18 22.0 25 26 28 33 29 27 20 16 12 0.472 4 0.591 48 254
20 24.25 28 30 31 36 32 31 24 20 12 0.472 4 0.591 55 355
23 28.0 32 34 35 38 34 32 28 24 16 0.472 6 0.591 57 403
27 31.5 36 38 39 42 39 37 31 27 16 0.551 6 0.787 63 542
30 35.5 40 42 43 48 44 42 35 31 16 0.551 6 0.787 67 644
33 39.5 44 46 48 52 47 45 39 34 20 0.551 6 0.787 72 847
36 44.0 50 52 54 58 55 53 43 35 20 0.551 6 0.787 81 1164
40 49.25 56 58 60 64 60 58 48 40 20 0.551 6 0.787 87 1495
DIMENSIONS LISTED IN INCHES

COMMON PARTS LIST
VMBL 12-40
Unit
Size
Purchased
Fan
Motor
Mount Impeller Shaft
Motor
Cover
Rubber
Floor
Isolator
Spring
Floor
Isolator
Spring
Hanging
Isolator
Inlet
Screen
Outlet
Screen
Companion
Flange
12 999-3601 386-0601 999-3621 999-3641 386-0621 999-3791 999-3771 999-3741 999-3701 999-3701 999-3661
15 999-3602 386-0602 999-3622 999-3642 386-0622 999-3791 999-3771 999-3741 999-3702 999-3702 999-3662
16 999-3603 386-0602 999-3623 999-3643 386-0623 999-3791 999-3771 999-3741 999-3703 999-3703 999-3663
18 999-3610 386-0602 999-3630 999-3650 386-0624 999-3791 999-3771 999-3741 999-3704 999-3704 999-3664
20 999-3604 386-0611 999-3624 999-3644 386-0625 999-3791 999-3771 999-3741 999-3705 999-3705 999-3665
23 999-3605 386-0611 999-3625 999-3645 386-0626 999-3791 999-3771 999-3741 999-3706 999-3706 999-3666
27 999-3606 386-0611 999-3626 999-3646 386-0627 999-3792 999-3772 999-3742 999-3707 999-3707 999-3667
30 999-3607 386-0611 999-3627 999-3647 386-0628 999-3793 999-3773 999-3743 999-3708 999-3708 999-3668
33 999-3608 386-0611 999-3628 999-3648 386-0629 999-3793 999-3774 999-3744 999-3709 999-3709 999-3669
36 999-3611 386-0612 999-3631 999-3651 386-0630 999-3794 999-3775 999-3745 999-3710 999-310 999-3670
40 999-3609 386-0612 999-3629 999-3649 386-0631 999-3794 999-3775 999-3745 999-3711 999-3711 999-3671
4
448 South Main Street
P. O. Box 930040
Verona, WI
53593-0040
Phone: [phone]
Fax: [phone]
E Mail: [email protected]
www.airspecialties.com