15
15
Initial Start-Up
Motor
• Be sure that all power to motor is off, follow the required lockout/tagout procedure,
and
mechanically secure the fan to prevent rotation.
• Inspect all electrical connections for proper termination, clearance, mechanical
strength and electrical continuity.
• Install the motor conduit box cover and all covers and panels that were removed
during
installation.
• Remove the mechanical lock or tie down from the fan to allow the fan to turn freely.
• Rotate the fan by hand to be sure there are no obstructions to free rotation. Ensure
that
no contact is made with electrical connections while rotating the fan.
• A motor that has been in storage for some time should be tested for moisture
(dielectric withstand insulation test) and relubricated (regreasable type) prior to being
put into service.
• During operation, observe motor performance. It should run smoothly with little noise.
The bearings should not overheat and should reach a normal operating temperature.
Any undue noise, overheating, or erratic performance should be investigated and
corrective action taken immediately to prevent serious damage. All ENDURADRIVE
®
Fan System motors are lubricated before shipment and will operate for a long period
before regreasing is required. The period will vary depending on environmental and
service conditions. Refer to Maintenance section of this manual for regreasing intervals.
Variable Frequency Drive (VFD)
• The ENDURADRIVE
®
Fan System includes a VFD for each motor, which is
required
to
operate the motor, and only this VFD may be used to operate the motor.
This VFD
has
been designed and programmed for use with this fan system and has
been
preprogrammed with parameters specific to your cooling tower.
• Startup must be performed by a service provider that is authorized to startup the
ENDURADRIVE
®
Fan System motor and VFD; contact your sales representative
for
details regarding startup. For technical details about the drive, see the
ENDURADRIVE
®
Fan System
ACS880 Start Up Guide
.
• The motor can be controlled by sending the VFD either a 4-20mA
(default)
or a
0
-
10V
(optional)
signal.
See the submittal drawing for wiring details and dip switch
settings.
• The ENDURADRIVE
®
Fan System may be operated at any speed below the
nameplate
RPM; there is no required minimum operating speed.
• The VFD must remain powered at all times, even when the motor is not operating.
When
the run enable (DI
1
) opens, a trickle current protects the motor from
moisture
ingress.
Refer to the ENDURADRIVE
®
Fan System ACS880 Start Up Guide for set up
and
wattage information.
• An optional vibration cutout switch should be wired to the VFD as shown in the
submittal.
The vibration cutout switch is part of that safety circuit and can be wired in
series with other safety measures. See submittal drawings for additional information.
Before wiring the vibration cutout switch to the VFD, remove the
appropriate factory
installed jumper per the submittal drawing.
•
All VFDs include Modbus
®
communication protocol as the standard communication
method with your building automation system. BACnet communication protocol is
optional using a gateway adapter that includes BACnet MS/TP and BACnet/IP.
Depending on the NEMA VFD enclosure rating, the gateway will be field-installed or
factory-installed.
See wiring details in your submittal,
and address details can
be
found
in the ENDURADRIVE
®
Fan System
ACS880 Start Up Guide.
For
additional
protocols,
contact your local BAC Sales
Representative.
