Aerovent IM-180 - Manual

Fiberglass Centrifugal Fans
©2005 Aerovent
Aerovent solid fiberglass fans are designed for long, trouble-free service in severe
corrosive conditions. Care should be exercised during installation and operation in
order to obtain maximum life.
Inspection
Installation
Operation
1. Inspect the equipment for any shipping damage. Freight
damage claims should be filed immediately with the carrier
if any damage is noted. Remove any foreign material such as
tags or packing from any moving parts or from within the
housing.
2. Turn motor, drive and impeller by hand to see that no mis-
alignment has taken place in shipment. (All units have been
test run before shipment.)
3. Check all bolts, fasteners, lube lines, etc., and tighten if nec-
essary.
4. Compare the voltage, hertz and phase stamped on the motor
with the current characteristics of the line to which the
motor is to be connected.
CAUTION: Temperature limitations for use with fiberglass
fans must be carefully observed. Do not install adjacent to
steam lines or in any location where 200°F temperature may be
exceeded. Fumes carried by the ducts must also be held below
this temperature.
For satisfactory operation, a good foundation and/or support
is essential. Foundations should be level, rigid and of sufficient
mass. A concrete base with mass at least 2 to 3 times the weight
of the fan and drive is preferred. If a steel platform is used, all
supports should be sturdy, rigid and braced in all directions.
When mounting, do not distort or twist. Shim or grout
under fan base, if necessary, to see that mating parts are accu-
rately aligned before tightening bolts to avoid applying excessive
pressures at the flanges.
Use gaskets between the fan flanges and the connecting
duct flanges to eliminate condensate leakage. A soft compress-
1. Fans must not be operated under conditions which would
lead to the build-up of solids on the fan blades. This could
cause an unbalanced condition and lead to premature fail-
ure. (Each fan has been statically and dynamically balanced
before leaving the factory.)
2. Check alignment of the V-belt drive by means of a straight-
edge. Align and adjust belt tension, if necessary. An adjust-
able motor base is provided as standard on Arrangement 9
and 10. After adjustment, be sure adjusting bolts are tight.
(See IM Manual Bulletin 101.)
3. All fans are lubricated at the factory and have been given a
run-in test before shipment. Aerovent’s fiberglass centrifugal
fans are furnished as standard with a shaft hole closure con-
sisting of a thin Teflon membrane secured with a stainless
steel plate to minimize the leakage of corrosive gases around
the bearings. However, as a further precaution against bear-
ing contamination, a more frequent lubrication schedule
than that outlined in IM-100 is recommended.
4. Turn the wheel over by hand to make sure that it runs free
and clear. Adjust if necessary.
5. Jog the fan electrically and note rotation. Each centrifugal
fan is marked to indicate direction of rotation. Reverse elec-
trical leads, if necessary, to obtain proper rotation.
ible corrosion resistant gasket should be employed. It is rec-
ommended that new gaskets be used anytime a joint is to be
replaced.
For best results, a flexible connection consisting of a flex-
ible sleeve and corrosion proof tie bands are recommended.
An access door in the scroll of the fan is convenient for quick
inspection of the fan to check for build-up of dirt on blades,
etc. Do not support the weight of the stack or duct by the inlet
or outlet connections.
General Installation, Operation and Maintenance Instructions For Aerovent Products
IM-180
April 2005