Aerovent IM-435 User Manual
IM-435
August 2014
General Installation, Operation and Maintenance Instructions For Aerovent Products
Axial Roof Ventilators & Tubeaxial Fans
Models: BSTAB, BSTA and BSB40
Aerovent Catalogs 435 and 620 provide additional
information on this equipment. These catalogs can be
found at www.aerovent.com or by contacting your local
Introduction
DO NOT INSTALL, USE OR OPERATE THIS EQUIPMENT
UNTIL THIS MANUAL HAS BEEN READ AND
UNDERSTOOD. READ AND SAVE THESE INSTRUCTIONS
FOR FUTURE USE.
The purpose of this manual is to aid in the proper
installation and operation of fans supplied by Aerovent.
These instructions are intended to supplement good
general practices and are not intended to cover detailed
Aerovent sales representative. Also see installation and
maintenance manuals ES-191 and ES-404.
instruction procedures because of the wide variety and
types of fans manufactured by Aerovent.
It is the responsibility of the purchaser to assure that
the installation and maintenance of this equipment is
handled by qualified personnel experienced in such work
and equipment.
Contact your local representative should you need further information.
Shipment and Receiving
Prior to shipment, all fans have been thoroughly inspected and tested.
All equipment shipped from Aerovent is boxed or crated
to fully comply with trucking requirements. Inspect all
shipments carefully for damage. THE RECEIVER MUST
NOTE ANY DAMAGE ON THE CARRIER’S BILL OF
LADING AND FILE A CLAIM IMMEDIATELY WITH THE
Handling
Handle your equipment with caution. Some fans are provided with lifting lugs or holes for easy handling. Others
must be handled using nylon straps which protect the
fan’s coating and housing. Spreader bars should be
used when lifting large parts.
Fans should be lifted by using straps around the fan
housing only. DO NOT LIFT FANS BY THE MOTOR,
MOTOR BASE, PROP OR FLANGES.
Storage
If fans are stored for any length of time, they should
be stored in a clean, dry location to prevent rust and
corrosion. Outdoor storage is not recommended. When
outdoor storage is necessary, fans should be protected
from the elements as completely as possible. Cover the
fan inlet and outlet and keep motors dry and clean.
For extended storage (more than 3 months) motor shafts
and bearings should be rotated monthly. If stored longer
FREIGHT COMPANY IN THE CASE OF ANY DAMAGE.
Keep a record of all equipment received including
inspection details and date of receipt due to the possibility of partial shipments.
If you receive damaged goods, contact your sales or
factory representative for repair or replacement service.
Roof ventilators should be lifted by using straps around
the fan housing or base only. Spreader bars should also
be used to avoid damage to stack caps or hoods. DO
NOT LIFT ROOF VENTILATORS BY THE STACK CAP
OR HOOD. On hooded units, disassemble the stack
from hood when lifting. Upblast models may be lifted
assembled.
than 6 months, bearing grease in motor and fan should
be purged and replaced with compatible grease. Belts
should be rechecked for proper tension. Storage records
should be kept to assure proper maintenance. The factory can advise warranty centers to provide motor and
bearing service if needed.
©2014 Aerovent
Installation
Roof ventilators should always be mounted to a flat,
level, solid and rigid structure. Particular caution should
be exercised when installing fans on metal buildings. Be
sure wall or roof is capable of supporting the fan(s).
Fans mounted on walls or roofs and not supported
correctly will cause vibration that could cause damage
or injury.
Fans mounted off ground level should be rigidly mounted to a structural platform and be placed over or as
near as possible to a solid wall or column.
Support for suspended fans must be cross-braced for
live load support to prevent side sway.
Use guy wires to help secure roof units if excessively
windy conditions prevail.
1. CAUTION! This fan contains rotating parts and
requires electrical service. Appropriate safety precautions should be taken during installation, operation
and maintenance.
2. 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 was specifically designed and manufactured for use in that environment. Explosion or fire
can result. Explosive, corrosive, high temperature,
or other extreme conditions may require special
construction, inspection and maintenance. It is
necessary to observe the fan manufacturer’s recommendations and limitations concerning the type of
material to be handled by the fan and its application
to special conditions.
3. When the roof ventilator is designed to be mounted
on a curb, the curb should be securely installed
prior to fan installation.
4. A damper, if used, should be securely mounted
within the curb or wall in a manner which allows
free and unobstructed operation.
5. CAUTION! All electrical work must be done in accordance with local and/or national electrical codes as
applicable. If you are unfamiliar with methods of
installing electrical wiring, secure the services of a
qualified electrician.
6. WARNING! This product must be grounded.
7. DANGER! Make sure power is turned off and locked
in the OFF position at the service entrance before
installing, wiring or servicing fan.
8. 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. See Table 1.
Table 1. Utilization Voltages
SYSTEM VOLTAGE/ UTILIZATION VOLTAGE
UNIT NAMEPLATE MIN. MAX.
115/60/1 104 127
208-230/60/1 or 208-230/60/3 187 253
230/60/1 or 230/60/3 207 253
277/60/1 249 305
200/60/3 180 220
380/60/3 342 418
460/60/3 414 506
575/60/3 517 633
110/50/1 99 121
220/50/1 198 242
380-415/50/3 342 456
440/50/3 396 484
9. On three-phase units check and calculate phase
unbalance as follows:
% Voltage Unbalance = 100 x max. voltage deviation
from avg. voltage ÷ avg. voltage
How To Use The Formula:
With voltage of 220, 216 and 213
a. Avg. Voltage = 220 + 216 + 213 = 649 ÷ 3 = 216
b. Max. Voltage Deviation From Avg. Voltage =
220 – 216 = 4
c. % Voltage Unbalance = 100 x (4 ÷ 216) = 1.8%
Voltage unbalance should not exceed 2%.
10. WARNING! Be sure to keep all wiring clear of rotat-
ing or moving parts.
11. 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.
12. On belt driven units, assure belts are tensioned and
aligned properly. See Maintenance section, page 3.
13. Check all setscrews and keys. Tighten as necessary
prior to fan start-up.
14. On roof units, anchor the fan securely to the curb.
Anchoring through the vertical portion of the curb
cap flange is recommended. Use a minimum of four
lag bolts or other suitable fasteners.
15. As with most installations of rotating machinery,
due to the nature of their applications, most fans
are available with protective guards and/or other
devices for required operating safety. Before operating the unit in any of its applications, determine the
requirements for any guards and/or devices needed
for protection against accidental contact with moving parts or against injury to nearby personnel or
equipment due to accidental rupture of fast moving
parts.
Check, Test & Start Procedure
WARNING
Electric shock hazard. Could cause severe injury or
death. Failure to bond the frame of this equipment
to the building electrical ground by use of the
grounding terminal provided or other acceptable
means may result in electrical shock. Disconnect
electric power before servicing equipment. Service
to be performed only by qualified personnel.
2 Aerovent IM-435
BEFORE START-UP: Disconnect power to this unit
before servicing the unit.
1. Check to verify that the propeller is free to rotate.
2. Verify that supply voltage on the line side of discon-
nect agrees with voltage on fan data plate and is
within the 10% utilization voltage.
3. Apply power to unit and check rotation of propeller
with the directional arrow on the unit.
WARNING: Rotation is critical. If allowed to operate
in the wrong direction, the motor will overload and
burn out.
WARNING: Check units for rotation. For three-phase,
rotation can be changed by interchanging any two of
the three line leads. If unit is checked on temporary
wiring, it should be rechecked when permanently
installed. Motor burn-out or tripped overload protection devices are usually the result of wrong rotation.
4. Electrical Input Check: Perform check of fan ampere
draw and verify that motor nameplate amps are not
exceeded. Take into account the service factor range
if motor is nameplated above a 1.0 service factor.
Maintenance
1. Before performing any maintenance on the fan, be
sure power is turned off and locked in the OFF
position at the service entrance.
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 Aerovent ventilators carry
a one-year limited 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 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. 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 glazing, 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.
7. The correct belt tension is important. Too tight of
a belt will result in excess bearing pressure on the
motor bearings and shaft pillow blocks and may
also overload the motor. Too loose of a belt will
result in slippage which will quickly “burn” out belts.
A belt should feel “live” when thumped, approximately
to finger pressure at midpoint between sheaves.
8. The belt alignment should also be checked to be
sure the belt is running perpendicularly to the rotating shafts. Fan and motor shafts must be parallel. Improper alignment will result in excessive belt
wear.
9. Check sheave setscrews to ensure tightness. Proper
keys must be in keyways.
10. Do not readjust blade pitch or fan RPM. If sheaves
are replaced, use only sheaves of identical size and
type.
1
⁄4" belt deflection (3 to 5 lb.) when subject
5. Fan RPM should be checked and verified with a
tachometer.
NOTE: The fan was balanced at the factory to be
within stringent vibration levels before shipment.
However, there are several things that may cause
vibration, such as rough handling in shipment and
installation, weak foundations and alignments.
11. If unit is to be left idle for an extended period, 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 belt driven
ventilators are factory lubricated and are provided with
external grease fittings. Annual relubrication is recommended, or more frequently if needed (see Table 2).
Do not over-grease. Use only 2 or 3 shots of
a recommended lubricant with a hand gun in most
cases (see Table 3). Maximum hand gun rating 40
P.S.I. Rotate bearings during lubrication where good
safety practice permits.
CAUTION: Greases of different soap bases
(lithium, sodium, etc.) may not be compatible when
mixed. Prevent such intermixing by completely purging the bearing of old greases.
The most frequent causes of bearing failure are
not greasing often enough, using an excessive
quantity of grease, or using incompatible greases.
Excessive vibration, especially if the bearing is not
rotating, will also cause bearings to fail. Bearings
must also be protected from water and moisture to
avoid internal corrosion.
13. During the first few months of operation it is rec-
ommended that the bearing setscrews be checked
periodically to ensure that they are tight.
14. The rotating wheel or propeller requires particular
attention since materials in the air being handled
can build up on the blades to cause destructive
vibration or weaken the structure of the propeller by corroding and/or eroding the blade metal.
Regular inspection and corrective action at intervals
determined by the severity of each application are
essential to good service life and safety.
Table 2. Suggested Fan Bearing Greasing Intervals
INTERVAL
(MONTHS)
12 to 18 Infrequent operation or light duty in clean atmosphere.
6 to 12 8 to 16 hrs./day in clean, relatively dry atmosphere.
3 to 6 12 to 24 hrs./day, heavy duty, or if moisture is present.
temperatures; moisture laden atmosphere; vibration.
Heavy duty in dirty, dusty locations; high ambient
1 to 3
TYPE OF SERVICE
Table 3. Grease Manufacturers
MANUFACTURER GREASE (NLGI #2)
Shell Gadus S2 V100 2
Exxon/Mobil Ronex MP
Aerovent IM-435 3
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