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Electrical savings can be large during periods of low ambient temperature
when the cooling requirement can be satisfied at reduced speeds. To benefit
from these advantages, it is important that the drive be installed correctly.
Marley supplies VFD and VFD controls specifically designed for our cooling
products. If you have purchased a Marley VFD and/or controls package, please
follow the instructions in the
User Manual
for that system. Most VFD problems
can be avoided by purchasing the Marley drive system. If you are installing a
VFD other than the Marley drive, please refer to that drives installation manual.
Improper use of a VFD may cause damage to equipment or personal
injury. Failure to correctly install the VFD drive will automatically
void all warranties associated with the motor and any equipment
that is either electrically or mechanically (directly) attached to the
VFD drive system. The length of this warranty avoidance will be
contingent on properly installing the VFD system and repairing any
damage that may have occurred during its operation. SPX Cooling
Technologies does not assume responsibility for any technical
support or damages for problems associate with non-Marley brand
VFD systems.
Changing the operational fan speed from the factory settings could
cause the fan to operate in an unstable region which may result in
damage to the equipment and possible injury.
Mechanical Equipment:
Always make certain that mechanical equipment is inoperable
during periods of maintenance—or during any situation of possible
endangerment to personnel. If your electrical system contains a
disconnect switch, lock it out until the period of exposure to injury
is over.
1. Check the Geareducer oil level at the sight glass near the motor. If oil is
required, fill to the proper level.
2. Spin the fan manually to assure that all fan blades properly clear the inside
of the fan cylinder. Observe the action of the driveshaft couplings to be
sure that the motor and Geareducer are properly aligned. If necessary,
correct the alignment in accordance with the included driveshaft manual.
3. Momentarily energize (“bump”) the motor and observe rotation of the
fan. The fan should rotate in a counterclockwise direction when viewed
from below. If rotation is backwards, shut off the fan and reverse two of
the three primary leads supplying power to the motor.
Warning
Warning
installation
Warning
