XB, HV, HVA, HVAR, ADD, ADDR, DDS, DDP, SXB, SADD
M0112_NOV 2020
Page 3 of 8
www.CANARM.COM
Canarm Ltd. - Corporate Head Office
2157 Parkedale Avenue, PO Box 367 Brockville, Ontario Canada K6V 5V6
Tel: (613) 342-5424 Fax: (613) 342-8437
hvacsales@canarm.ca
www
.canarm.com
OPERATION CONTINUED
Typical Installation
- Refer to page 7
Start Up
Turn the fan on and inspect for the following.
• Direction of rotation
• Improper motor amperage
• Excessive Vibration
• Unusual Noise
• Improper belt tension or alignment
If a problem is discovered shut off the fan and refer to
the section on troubleshooting to discover the cause of
the problem. The fan should be inspected after 30
minutes, 8 hours and 24 hours of operation to ensure all
fasteners are tight and belts are properly tensioned and
aligned.
MAINTENANCE WARNING
Disconnect and secure to the OFF position all electrical power to the fan prior to inspection or
servicing. Failure to comply with this safety precaution could result in serious injury or death.
• Ventilators should be checked at least once a year. For critical or severe applications a routine check every two
to three months is suggested.
• When removing or installing a belt don’t force the belt over the sheave. Loosen the motor mount so that the belt
can be easily slipped over the sheave.
• The belt, on belt driven units, should be removed and carefully checked for 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. At the same time check the sheaves for chips, dents or rough surfaces
that could damage the belt.
• The correct belt tension is important. Too tight a belt will result in excess bearing pressure, which can cause
premature bearing failure and may cause the motor to overload, too loose a belt will result in slippage, which
will burn out belts. Proper belt deflection should be 1/64” (half way between sheave centers) for each inch of
belt span when a force of approximately 5 lbs. is applied.
• The belt alignment should be checked to be sure that the belt is running perpendicular to the rotating shafts.
Motor and drive shafts must be parallel.
• A periodic inspection of all fasteners should be carried out to ensure they have not loosened due to vibration.
Particular attention should be paid to fasteners attaching the wheel to the shaft and those attaching the shaft to
the bearing.
• The standard pillow blocks on belt driven fans are factory lubricated. These bearings should be lubricated on a
semi annual basis (more frequently in severe applications) using a high quality lithium based grease. With the
unit running add grease very slowly, using a manual grease gun, until a slight bead of grease forms at the seal.
Be careful not to unseat the seal by over lubricating or by using excessive pressure. When the bearings are
obstructed from view use no more than three injections with a hand operated grease gun.
• Dust and dirt on the exterior surface of the motor, fan panel and the entire fan wheel should be removed, at
intervals determined by the severity of the application, to ensure proper service life and safety.
• For additional safety information refer to AMCA publication 410-96,Safety Practices for Users and Installers of
Industrial and Commercial Fans
