Fan Belt Adjustment - EVAPCO ESW Series Operation And Maintenance Instruction

Fan Belt Adjustment

(Direct drive units do not require any adjustment)
The fan belt tension should be checked at start up and again after the first 24 hours of operation to correct for any initial stretch. To
properly adjust the belt tension, position the fan motor so that the fan belt will deflect approximately 3/8" when moderate pressure is
applied midway between the sheaves. Figure 1 and Figure 2 show two ways to measure this deflection. Belt tension should be checked on
a monthly basis. A properly tensioned belt will not "chirp" or "squeal" when the fan motor is started.
Figure 1 – Method 1
Figure 2 – Method 2
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