CAUTION
No service work should be performed on the drive system without first ensuring the fan and pump
motors have been isolated, tagged and locked in the off position.
Drive system with external motor
1.
Fan motor
2.
Motor sheave
3.
Belt
4.
Fan sheave
5.
Fan
Belt Tensioning
Belt tensioning can be adjusted by changing the position of the fan motor(s) by rotating the motor base adjustment
screw.
Check belt tension as follows:
1. Shut off fan(s).
2. Rotate the fan sheave half a turn to evenly distribute the tension in the belt before measuring.
3. Check belt tension by verifying both following conditions.
-
The deflection amounts 10 mm / m free belt length (see figure below).
-
The deflection force required is between the minimum and maximum values given in the table below.
CAUTION
Fan has to be blocked while replacing belts.
W W W . B A L T I M O R E A I R C O I L . E U
19
5 Maintenance Procedures
5 Maintenance Procedures
