Air Specialties Express VE Assembly instructions

INSTALLATION, OPERATING AND MAINTENANCE INSTRUCTIONS
CENTRIFUGAL SPUN ALUMINUM ROOF VENTILATORS
MODEL VE — 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 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 requires a minimum of four (4) mounting fasteners, of the appropriate size and type, in order to be
securely fastened to the roof curb. Be sure to use an approved sealant or gasket between the fan and curb to
prevent leaking and reduce possible vibration.
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 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 warranty.
10. Power should be routed through the conduit openings provided.
11. Access to the motor compartment is possible by either removing the motor cover or motor tube/motor cover
assembly.
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 set screws and keys, tighten as necessary prior to fan start up. DO NOT over torque.
16. Remount motor cover/tube, do not over torque fasteners (30 in. - lb. maximum).
FORM ASX-1401-C
FORM ASX-1401-C, 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 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. 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.
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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 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 All 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 remove the entire assembly from the unit base. To rebuild, assemble in reverse order.
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Fan Cap View from Below

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MODEL VEDK - DIRECT DRIVE - PARTS LIST
VEDK 06 - 18

5
MODEL VEBK - BELT DRIVE - PARTS LIST
STANDARD
Motor Cover Pillow 7Diffusers 9
Motor 4Vibration 5Block (Set of 4) / Wind 11
Unit Fan 3Mount Isolator Fan 6Bearings Fan 8Support Std. 10 Band Curb 12
Size LID 1Tube 2Shroud Assem’y (4 Req’d)* Shaft (2 Req’d) Plate Frame Wheel (Pieces) Cap
06 384-6521 384-6172 384-6131 384-0661 998-6126 998-5421 999-8606 384-6101 384-2451 384-0544 - - 384-2401
08 384-6521 384-6172 384-6131 384-0661 998-6126 998-5421 999-8606 384-6101 384-2452 384-0548 - - 384-2401
10 384-6521 384-6172 384-6132 384-0661 998-6126 998-5421 999-8606 384-6102 384-2453 384-0552 - - 384-2402
12 384-6521 384-6172 384-6132 384-0661 998-6126 998-5421 999-8606 384-6102 384-2454 384-0555 - - 384-2402
15 384-6522 384-6175 384-6133 384-0663 998-6126 998-5421 999-8606 384-6103 384-2455 384-0559 - - 384-2403
18 384-6523 384-6178 384-6134 384-0665 998-9748 998-5421 999-8606 384-6104 384-2456 384-0563 - - 384-2404
21 384-6524 384-6180 384-6135 384-0667 999-9748 998-5423 999-8637 384-6105 384-2457 384-0565 - - 384-2405
24 384-6525 384-6182 384-6136 384-0669 999-9748 998-5423 999-8637 384-6106 384-2458 384-0566 - - 384-2406
30 384-6526 384-6201 384-6137 384-0646 999-9748 998-5435 999-8632 384-6111 384-0521 384-0636 (2) 384-2591 384-2421
36 384-6527 384-6203 384-6138 384-0648 999-9748 998-5427 999-8633 384-6112 384-0522 384-0637 (2) 384-2592 384-2423
42 384-6528 384-6205 384-6139 384-0651 999-9748 998-5429 999-8634 384-6121 384-0526 384-0638 (2) 384-2593 384-2431
48 384-6528 384-6205 384-6140 384-0651 999-9748 998-5429 999-8634 384-6122 384-0527 384-0639 (2) 384-2594 384-2433
54 384-6528 384-6205 384-6141 384-0651 999-9748 998-5431 999-8634 384-6123 384-0531 384-0640 (2) 384-2595 384-2435
Unit
Size Volt Code Motor Type Unit Construction
Standard Extended
06-18
A,B,D
11/2 HP & Lower 3/4 HP & Higher
21/4 HP & Lower 1/3 HP & Higher
51/3 HP & Lower 1/2 HP & Higher
6ALL
C,E,G,H 1,5,8,9 3/4 HP & Lower 1 HP & Higher
2,6,7 ALL
21-24
A,B,D 1,2,5,6 ALL
C,E,G,H 1,5,7,8,9 5 HP & Lower 7-1/2 HP & Higher
2,6 2 HP & Lower 3 HP & Higher
30-54
A,B,D 1,2,5,6 ALL
C,E,G,H 1,5,7,8,9 5 HP & Lower 7-1/2 HP & Higher
2,6 2 HP & Lower 3 HP & Higher
Motor Type Volt Code
1 = ODP A = 115 1ø
2 = 2 Spd. 2 Winding B = 208 1ø
5 = TE C = 208 3ø
6 = Exp. Proof D = 230 1ø
7 = 2 Spd. 1 Winding E = 230 3ø
8 = ODP High Eff. G = 460 3ø
9 = TE High Eff. H = 575 3ø
EXTENDED
Motor Cover Pillow 7Diffusers 9
Motor 4Vibration 5Block (Set of 4) / Wind 11
Unit Fan 3Mount Isolator Fan 6Bearings Fan 8Support Std. 10 Band Curb 12
Size LID 1Tube 2Shroud Assem’y (4 Req’d)* Shaft (2 Req’d) Plate Frame Wheel (Pieces) Cap
06 384-6521 384-6173 384-6131 384-0662 998-6126 998-5422 999-8606 384-6101 384-2451 384-0544 - - 384-2401
08 384-6521 384-6173 384-6131 384-0662 998-6126 998-5422 999-8606 384-6101 384-2452 384-0548 - - 384-2401
10 384-6521 384-6173 384-6132 384-0662 998-6126 998-5422 999-8606 384-6102 384-2453 384-0552 - - 384-2402
12 384-6521 384-6173 384-6132 384-0662 998-6126 998-5422 999-8606 384-6102 384-2454 384-0555 - - 384-2402
15 384-6522 384-6176 384-6133 384-0664 998-6126 998-5422 999-8606 384-6103 384-2455 384-0559 - - 384-2403
18 384-6523 384-6179 384-6134 384-0666 998-9748 998-5422 999-8606 384-6104 384-2456 384-0563 - - 384-2404
21 384-6524 384-6181 384-6135 384-0668 999-9748 998-5424 999-8637 384-6105 384-2457 384-0565 - - 384-2405
24 384-6525 384-6183 384-6136 384-0670 999-9748 998-5424 999-8637 384-6106 384-2458 384-0566 - - 384-2406
30 384-6526 384-6202 384-6137 384-0647 999-9748 998-5426 999-8632 384-6111 384-0521 384-0636 (2) 384-2591 384-2421
36 384-6527 384-6204 384-6138 384-0649 999-9748 998-5428 999-8633 384-6112 384-0522 384-0637 (2) 384-2592 384-2423
42 384-6528 384-6206 384-6139 384-0652 999-9748 998-5430 999-8634 384-6121 384-0526 384-0638 (2) 384-2593 384-2431
48 384-6528 384-6206 384-6140 384-0652 999-9748 998-5430 999-8634 384-6122 384-0527 384-0639 (2) 384-2594 384-2433
54 384-6528 384-6206 384-6141 384-0652 999-9748 998-5432 999-8634 384-6123 384-0531 384-0640 (2) 384-2595 384-2435
*Sizes 42, 48, 54 get (5) Vibration Isolators.

448 South Main Street
P. O. Box 930040
Verona, WI
53593-0040
Phone: [phone]
Fax: [phone]
E Mail: [email protected]
www.airspecialties.com
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TYPICAL INSTALLATIONS
Proper fan performance requires uniform and stable airflow at the fan inlet. Avoid transitions,
obstructions, elbows or other duct fittings near the fan inlet.
Typical roof curb height is 8” to 12” above the roof deck. Additional height reduces the likelihood
of snow or rain entering through the roof opening.
Installation and electrical work should be performed by qualified personnel and must be in
accordance with all applicable code requirements.
For protection of personnel, inlet guards are recommended when the fan is within reach (or within
7 feet) of occupied areas or work areas.
Figure 1 shows a typical Model VEBK power roof ventilator
installation without duct work. The roof flashing is shown
installed over standard canted style roof curb. A gravity operated
backdraft damper is shown installed on the damper shelf which
is located at the base of the roof curb. Power wiring is extended
through the roof opening, through the damper conduit knockout,
into the fan wiring chase and to the factory wired disconnect
switch.
Figure 2 shows a typical Model VEBK power roof ventilator
installation with an exhaust duct. The duct is shown extending
through the roof opening and inside a typical self flashing style
roof curb. A gravity operated backdraft damper is shown
fastened to a 3/4” x 3/4” sheetmetal angle installed inside the
exhaust duct.
Figure 1
POWER ROOF VENTILATOR
(NON-DUCTED INSTALLATION)
Figure 2
POWER ROOF VENTILATOR
(DUCTED INSTALLATION)