Product Manual

M0112 – XB,HV,HVA,ADD,DDS,DDP

Typical Installation

Refer to page 8

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.