14
Optional ENDURADRIVE
®
Fan System
The ENDURADRIVE
®
Fan System is an option for select FXV3 Closed Circuit Cooling
Towers and CXVT Evaporative Condensers
. The ENDURADRIVE
®
Fan System includes a
direct drive motor and variable frequency drive (VFD) designed specifically for the motor.
DANGER FOR ThE OPTIONAL ENDURADRIVE
®
FAN SySTEM
•
DANGER:
Rotating equipment will cause severe personal injury or death to persons who come into contact. Do not perform any service on or near
the fans, motors, and drives, or inside the unit without first ensuring that the fans and pumps are disconnected, locked out, and tagged out.
WARNING FOR ThE OPTIONAL ENDURADRIVE FAN SySTEM
•
WARNING:
Do not disassemble the motor, because it contains strong permanent magnets that can cause severe personal injury or death.
•
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 a EnDURADRIVE
®
Fan System motor.
•
WARNING:
The variable frequency drive 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.
•
WARNING:
The surfaces of motor enclosures may reach temperatures that are high enough to cause discomfort or injury to personnel coming
into
contact with them. Protection should be used to prevent accidental contact with hot surfaces. Failure to observe this precaution could result
in
personal injury.
NOTICES FOR ThE OPTIONAL ENDURADRIVE
®
FAN SySTEM
•
VFD must be powered on at all times so that moisture can be removed from motor automatically.
•
Do not bypass VFD. The motor can only be operated by VFD, and bypassing the VFD by wiring the motor directly across-the-line will result in motor failure.
•
Incorrect motor rotation direction for extended periods can cause equipment damage. Be sure to verify motor rotation direction before operating the
unit. When reversing the direction of rotation, allow the fan to come to a complete stop before restarting the motor. Fan reversal should be used only
after the other methods of fan control fail. If utilized, the fans should be run in reverse for no longer than 20 minutes at no more than 50% speed,
and the cooling tower should be observed during this time. Before returning to normal operation, visually inspect the fan blades for ice formation.
•
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.
•
To prevent equipment damage, do not exceed the RPM listed on the motor nameplate.
•
If a HI POT test (High Potential Insulation test) must be performed, follow the precautions and procedure in
nEMA MG1 and MG2 standards to avoid equipment damage.
®
