PennBarry ROUND CENTREX Operation & Maintenance Manual page 5

START-UP AND OPERATION
The ventilator has been checked at the factory prior to shipment for mechanical noises. If mechanical noises develop:
1. Check rotating components for adequate clearance.
2. Check proper belt tension and pulley alignment.
3. Check installation and anchoring.
4. Check fan bearings. Switch on electrical supply and allow fan to reach full speed.
Check carefully for:
1. Correct rotation of the centrifugal wheel.
Incorrect rotation overloads motor severely and results in serious motor damage. To change rotation of three phase
units, interchange any 2 of the 3 line leads. On single phase units, change the terminal block set-up following the wiring
diagram on the motor.
2. Overheating motors and bearings.
Use care when touching the exterior of an operating motor. Modern motors normally run hot. They are designed to
operate at higher temperatures. This is a normal condition, but they may be hot enough to be painful or injurious to the
touch.
If any problem is indicated, TURN OFF POWER TO UNIT IMMEDIATELY. Lock out the electrical supply, check carefully for the cause of
the trouble and correct as needed. Even if the fan appears to be operating satisfactorily, shut down after a brief period and check all
fasteners, setscrews and keys for tightness.
During the first eight (8) hours of operation, check the fan periodically for excessive vibration or noise. At this time, also check
motor input current and motor bearing temperatures to ensure that they do not exceed manufacturer's recommendations. After
eight hours of satisfactory operation, shut down the fan and lock out the electrical power to check the following items and adjust if
necessary:
1. All set-screws, keys and fasteners.
2. Drive coupling alignment.
3. Belt alignment.
4. Belt tension.
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