Aerovent IM-977 - Manual (Page 2)

2 Aerovent IM-977
Installation
Check, Test and Start Procedure
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 cor-
rectly will cause vibration that could cause damage or
injury.
Fans mounted off ground level should be rigidly mount-
ed 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 precau-
tions 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, gases or fumes are present
unless it was specifically designed and manufac-
tured for use in that environment. Explosion or fire
can result. Explosive, corrosive, high temperature, or
other extreme conditions may require special con-
struction, inspection and maintenance. It is neces-
sary to observe the fan manufacturer’s recommen-
dations and limitations concerning the type of mate-
rial 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 accor-
dance 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 the 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.
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 voltages 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.
13. Check all setscrews and keys. Tighten as necessary
prior to fan startup.
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 require-
ments for any guards and/or devices needed for
protection against accidental contact with moving
parts or against injury to nearby personnel or equip-
ment due to accidental rupture of fast moving
parts.
1. Disconnect power to this unit before servicing the
unit. Make sure power is turned off and locked in the
OFF position.
2. Tighten all bolts and setscrews securely and, on belt
driven fans, check sheave alignment and belt tension.
Tighten belts if necessary. NOTE THAT ALL BOLTS,
SETSCREWS AND BELTS SHOULD BE CHECKED
AND TIGHTENED AFTER TWO DAYS OF INITIAL
OPERATION.
3. Clearance should be checked all around between
wheel or propeller tips and the housing before start-
ing up. The wheel or propeller should not strike the
housing.
No initial lubrication is required. Motors and fan bear-
ings have been prelubricated by the motor manufac-
turer.
4. Apply power to the unit and check the rotation of the
wheel with the directional arrow on the unit.
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