REYMSA COOLING TOWERS, INC.
www.reymsa.com
56
B.5 FAN
A. Before starting fans for first use, ensure that the fan rotates freely, each fan should have a minimum tip
clearance of no less than ¼ inch and no larger than ¾ inch. Although tip clearances are quality checked
before releasing any REYMSA Cooling Tower, reinspect them to ensure there was no movement during
shipping. Report any non-comformance to your REYMSA Representative.
B. Verify that all fan guards are in place and secure.
C. Start Cooling Tower fan(s) and make sure they are rotating as indicated on the fan duct and that air is
entering at the bottom of the Tower and discharging through the fan duct. Reverse rotation of the fan
motor if required. For units with VFDs, refer to “C.1 FAN CONTROL - VFD”.
D. Verify that amperage of the motor does not exceed the amperage shown on the data plate. If this
happens the pitch of the fan blades must be adjusted to decrease the amperage, but not less than 10%
of the value described on the data plate. To adjust the pitch of the fan blades, call your local REYMSA
representative for assistance.
E. The sound data included in engineering data sheet is only a theoretical calculation under free-field
conditions and should be used only as guideline. Any reflections or obstructions impact directly the sound
level.
Never:
▪ Operate the fan when the access door is removed.
▪ Remove access door while fan is in operation.
▪ Operate the fan when the fan guard is removed.
▪ Never operate the fan when the access door or the fan guard is removed.
▪ Never remove access door while fan is in operation.
WARNING
In Double Fan Cooling Towers (per cell), ensure to Start-Stop the fan motors at the same
time. If you need more information, please contact REYMSA.
WARNING
If fan motors are cycling (ON-OFF) at full voltage controlled by temperature signal
or heat load demand. Rapid ON-OFF cycles can damage the fan.
WARRANTY VOID
FAN MOTOR
Use a soft-starter or VFD as motor starter.
When using a Variable Frequency Drive (VFD), is not uncommon to exhibit resonant
frequencies that result in vibrations, damaging all components of the system. To prevent
premature failure, the VFD must be programed to “skip” resonant frequencies that cause
unusual rumbling or grinding noise.
WARNING
Start-Up
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