Cool Air HS Troubleshooting guide

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 rst 24-48 hours of operation after
installation. If rust or corrosion are found anywhere on the
fan, the aected area should be thoroughly cleaned and
renished. 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 aect 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 nger midway
between the motor pulley and the fan pulley. Push the belt
enough to deect 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 [phone] | 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.

Operation & Maintenance Instructions —Other Side
Installation Instructions
for HS & HSE Power Roof Ventilators
Pre-Installation Check of PRV. Before installation
of an American Coolair PRV, a careful check should be made
for shipping damage which may aect operation of the unit.
Concealed damage to the wind shroud damper assembly is a
possibility. If damage is found, le a claim immediately with
delivering carrier. On belt drive units, pulley alignment and
belt tension should be checked (see paragraph 2 under
Operation and Maintenance). Before connecting to power
source, make sure propeller turns freely without striking
frame or any foreign object. Check motor nameplate to be
sure correct phase and voltage are being used. Note
direction arrow adjacent to propeller and make sure rotation
is correct when power is applied.
Installation Procedures. Types HS / HSE PRV are
shipped in two packages for quick assembly and installation
on roof curb.
a) Installation of Base of PRV. The major component of the
Type HS / HSE PRV is the base section made up of curb cap,
fan and motor. Verify curb dimensions and securely attach
base to curb.
b) Installation of Wind Shroud Assembly. The wind shroud
assembly consists of wind shroud and counterbalanced
dampers. Wind shroud assembly should be attached to
shroud supports on base of PRV. Bolts for this purpose are in
a bag tied to the damper stop inside the wind shroud. Metal
clips holding dampers in closed position for shipment
should be removed and discarded. Manually operate
dampers to be sure they open freely and close snugly over
inner ring of shroud.
c) Magnetic Latches (Optional Accessory). If magnetic
latches are provided, check adjustment of latches to insure
proper contact with buttery damper when closed.
Note : All local, state and federal codes should be checked to make
sure all wiring, guarding and intended usage of the PRV unit(s)
comply with all applicable codes. The proper type and class of PRV
and motor should be used for air being handled such as explosive
or other hazardous air mixtures.
P.O. Box 2300 | Jacksonville, FL 32203
Ph 904-389-3646
Fax [phone] | 904-381-7560
www.coolair.com
Member AMCA
R
Form No. 510-40-5 (August, 2014)
DO NOTINSTALL FAN WITH MOVING PARTS WITHIN 8
FEET OF FLOOR OR GRADE LEVEL WITHOUT A GUARD
THAT COMPLIES WITH OSHA REGULATIONS. DO NOT
USE UNLESS ELECTRICAL WIRING COMPLIES WITH
ALL APPLICABLE CODES. DO NOT WIRE WITHOUT
PROVIDING FOR A POWER SOURCE DISCONNECT AT
THE FAN ITSELF. DO NOT SERVICE EXCEPT BY A
QUALIFIED MAINTENANCE TECHNICIAN AND ONLY
AFTER DISCONNECTING THE POWER SOURCE.
FAILURE TO OBSERVE THESE PRECAUTIONS CAN
RESULT IN SERIOUS INJURY OR DEATH.
WARNING CAUTION
HS / HSE Power Roof Ventilator
(Cutaway View)
(optional for HSE)