Air Specialties Express LU-BELT Assembly instructions

FORM ASX-1309-B
INSTALLATION, OPERATING AND MAINTENANCE INSTRUCTIONS
PROPELLER UPBLAST POWER ROOF VENTILATORS
MODEL LU - BELT AND DIRECT DRIVE
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. Upon unpacking, inspect the unit for any damage that may
have occurred in transit and check for loose or missing parts.
INSTALLATION
1. Upon unpacking, inspect the unit for any damage that may have occurred in transit. Check also for loose or
missing parts.
2. When handling the fan, do not lift or move the fan by using the wind band. Use the lifting loops provided. Use
spreaders of adequate size to prevent damage to the wind band.
3. CAUTION! This fan contains rotating parts and requires electrical service. Appropriate safety precautions
should be taken during installation, operation and maintenance.
4. 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!
5. This ventilator is designed to be mounted on a curb. The curb should be securely installed prior to fan installation.
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 the OFF position at the service 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. WARNING! Be sure to keep all wiring clear of rotating or moving parts.
11. WARNING! Before starting the fan, turn the propeller to assure it rotates freely. If needed, adjust the propeller /
shaft/bearing/motor position as required to achieve necessary clearances.
12. CAUTION! On belt drive units assure belts are tensioned and aligned properly. (See Maintenance section.)
13. WARNING! Check all set screws and keys. Tighten as necessary prior to fan startup.
14. Anchor the fan securely to the curb. Anchoring thru the vertical portion of the curb cap flange is recommended. Use
a minimum of four (4) lag bolts or other suitable fasteners.
OPERATION
1. CAUTION! Assure the fan inlet/ductwork/exhaust openings are clean and free of obstructions.
2. WARNING! This contains rotating parts. Appropriate safety precautions should be taken during operation.
3. Operate under power and check for correct rotation direction.
4. CAUTION! Incorrect rotation can damage the fan motor. FORM ASX-1309-B, Page 1
Air Specialties Express, 448 S. Main St., P. O. Box 930040, Verona, WI 53593-0040 Phone: [phone] Fax: [phone] www.airspecialties.com

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 ASX 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
ASX representative for additional warranty details.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. CAUTION! Check sheave set screws to ensure tightness. Proper keys must be in keyways.
10. CAUTION! Do not readjust blade pitch or fan RPM. If sheaves are replaced, use only sheaves of identical size
and type.
11. 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.
12. The standard pillow block bearings on smaller ASX 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.)
The standard pillow block bearings on larger ASX belt driven ventilators are factory lubricated and are
provided with external grease fittings. Relubrication annually or more frequently, if required, is recommended.
During the first few months of operations, it is recommended the set screws be checked to assure they are tight.
13. The propeller should not require maintenance except for removing foreign materials that may accumulate on the
blades. The balance weights should not be disturbed. If a propeller has to be removed from the shaft, do not
apply force that will damage the bearings or warp the propeller. Use a wheel puller.
2

3
Vent C D F
Size Curb Cap Max. Roof Opening
54 62 20-1/2 54
60 68 21-1/2 60
72 82 24-1/2 72
Models LUBA Sizes 54 thru 72 Models LUKA Sizes 24 thru 60
Vent
Size ABCDE
24 29 28-1/2 16 36 30
30 35-1/2 31-1/2 16 42 36
36 41 34-1/2 16 48 42
42 47 37-1/2 20 54 48
48 53 40-1/2 20 60 54
A
E
D
B
C
BELT DRIVE
Models LUBK Sizes 24 thru 48
DIMENSIONS LISTED IN INCHES
DIMENSIONS LISTED IN INCHES

4
Vent C D F
Size Curb Cap Max. Roof Opening
24 32 12-1/2 27
30 38 13 33
36 44 17 36
42 50 17 42
48 56 22 48
54 62 22 54
60 68 22 60
72 82 30-1/2 72
DIRECT DRIVE
Models LUDA Sizes 24 thru 72
DIMENSIONS LISTED IN INCHES
448 South Main Street
P. O. Box 930040
Verona, WI
53593-0040
Phone: [phone]
Fax: [phone]
Email: [email protected]
www.airspecialties.com