Installation Instructions—Other Side
Operation and Maintenance
Instructions
for HS & HSE Power Roof Ventilators
Cleaning and Adjustments. The entire fan should
be cleaned as necessary to remove accumulated dust, dirt
and other debris that may collect on the blades and other
parts. Belts should be inspected and tension adjusted (see
below). Check for belt misalignment that will cause
excessive wear and premature failure. This same inspection
of belts and adjustment of tension should be made
frequently during the first 24-48 hours of operation after
installation. If rust or corrosion are found anywhere on the
fan, the affected area should be thoroughly cleaned and
refinished. When cleaning and servicing the PRV, removal of
the shroud assembly is necessary for access to the propeller.
Motor and belts are accessible by removal of the motor
Speed and Air Volume Adjustment. Any
reduction in the air volume will reduce the air velocity. This
in turn may affect all-weather operation and proper opening
of the damper doors. With this limitation, fan speed may be
adjusted through the use of variable pitch motor pulleys on
units supplied as such. Motor capacity must be carefully
checked before any increase in fan speed is made.
Belt Replacement and Tensioning.
a) To change the belt(s), loosen the bracket bolts and
tension adjustment bolts. Remove belt(s) from the motor
and fan pulleys. Install the new belt(s) and adjust as
indicated below. When replacing belt(s), do not roll over the
pulleys, as this will damage the belt(s) and cause premature
failure.
b) To check the belt tension, place a finger midway
between the motor pulley and the fan pulley. Push the belt
enough to deflect the belt approximately 1/64” for every
inch of center distance while applying approximately, 5 lbs
of force. Ideal tension is the lowest tension at which the belt
will not slip under peak load conditions. Keep belts free
from foreign material that may cause slippage. Make V-Drive
inspection on a periodic basis. Re-tension when slippage is
detected.
c) To adjust tension, loosen the motor bracket bolts and
use tension adjustment bolts to obtain the correct belt
tension. Be sure to re-tighten the motor bracket bolts after
making adjustments. Check the belt alignment at the same
time.
Lubrication. On the belt drive models, fan
bearings are factory lubricated for extended service and
operation. Normal maintenance would call for annual
lubrication of the fan bearings. For lubrication of the electric
motor, see motor manufacturer instruction manual.
CAUTION
: Use of the tension adjustment bolt makes
it easy to over tighten the belt. If this occurs, belts
and bearings can fail in a short period of time. Do not
over tension.
Bearings. Bearings are standard, commercially available
pillow block bearings and may be purchased at any industri-
al supply house.
Motor. Repairs should only be performed by an authorized
motor repair facility. Contact either the motor manufacturer
or American Coolair Corp for locations.
Notice : Do not return damaged or defective parts to American Coolair
Corp without prior authorization. If repairs under warranty are claimed, see
warranty terms on the reverse. Claims for warranty repairs regarding the
motor should be made directly wit the motor manufacturer.
Periodic Fan Activation. If the HS / HSE PRV is
used for emergency heat and smoke removal only (not used
for general building ventilation) then a routine, periodic
activation of the fan is recommended to ensure reliable
operation. The fan should be activated at least annually and
allowed to run for a minimum one-hour duration. During
this time, cleaning, adjustment and lubrication as described
above should be performed.
P.O. Box 2300 | Jacksonville, FL 32203
Ph 904-389-3646
Fax 904-387-3449 | 904-381-7560
www.coolair.com
Member AMCA
Form No. 510-40-5 (August, 2014)
R
Repair Parts.
Belts. Belts are standard V-Belts used on industrial
machines and replacements can be obtained through local
industrial supply houses. If more than one belt is used on
the fan, be sure to purchase a matching set of replacement
belts. To install replacement belt(s), see instructions above.
Blade Assembly. If one or more of the blades of the blade
assembly is damaged, it is recommended that the entire
propeller be removed and returned to the factory for repairs.
If an unbalanced condition develops, thoroughly clean the
blades to remove dirt and other build up. If unbalance
persists, contact American Coolair.
