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SERIES 3000 COOLING TOWER
Optional Accessory Installation
3
ENDURADRIVE™ Fan System Installation (Optional)
The ENDURADRIVE™ Fan System is an option for select Series 3000 Cooling Towers and is
standard on S3E-1424-14U and S3E-1424-14W models
. The ENDURADRIVE™ Fan System
variable frequency drive (VFD) is to be installed per the
ENDURADRIVE™ Fan System ACH550-UH
HVAC User’s Manual
. The fan motor must be wired directly into the VFD and cannot be wired across
the line. For wiring details, refer to the submittal drawings.
Warnings for the ENDURADRIVE™ Fan System
•
WARNING:
ENDURADRIVE™ Fan System motors can induce voltage and current in the motor leads by rotating the motor shaft, even
when the motor is completely disconnected from the power source. Electrical shock can cause severe personal injury or death. Therefore,
mechanically lock or tie down the fan until all wiring has been completed and before servicing the drive system, or when performing any
motor maintenance procedure. Only qualified personnel should attempt the installation, operation and maintenance of this equipment.
•
WARNING:
Pacemaker danger − Magnetic and electromagnetic fields in the vicinity of current carrying conductors and ENDURADRIVE™ Fan
System motors can result in a serious health hazard to persons with cardiac pacemakers, metal implants, and hearing aids. To avoid risk,
stay away from the area surrounding the ENDURADRIVE™ Fan System motor.
•
WARNING:
The VFD may apply hazardous voltages to the motor leads after power to the controller has been turned off. Verify that the
controller is incapable of delivering hazardous voltages and that the voltage at the motor leads is zero before proceeding. Failure to comply
with this warning may result in severe personal injury or death.
Attentions for the ENDURADRIVE™ Fan System
• VFD must be powered on at all times so that trickle current can remove moisture from motor when idle.
• Use only a shielded motor power cable with a complete circumferential braided or copper film/tape ground jacket around the power leads.
This ground should be secured to the motor frame from within the motor terminal box and must return without interruption to the drive
ground.
• To prevent equipment damage, be sure that the electrical service is not capable of delivering more than the maximum motor rated amps
listed on the rating plate.
