9 SM01P
6 INSTALLATION
NOTE
SCL/SCM Series drives are intended for inclusion within other equipment, by
professional electrical installers according to EN 61000-3-2. They are not intended
for stand-alone operation.
WARNING!
Drives must not be installed where subjected to adverse environmental conditions
such as: combustible, oily, or hazardous vapors or dust; excessive moisture or
dirt; vibration; excessive ambient temperatures. Consult Lenze AC Tech for more
information on the suitability of a drive to a particular environment.
SCL/SCM models are suitable for UL Pollution Degree 2 environment only, and MUST be
installed in an electrical enclosure that will provide complete mechanical protection and will
maintain the internal temperature within the drive’s ambient operating temperature rating.
All drive models MUST be mounted in a vertical position for proper heatsink cooling.
Maintain a minimum spacing around the drive of at least 1 inch (25 mm) on each side and
2 inches (50 mm) on the top and bottom for units up to 5 Hp (4 kW), and 2 inches (50 mm)
on each side and 4 inches (100 mm) on the top and bottom for larger units. Allow more
spacing if the drive is mounted next to other heat-producing equipment. Do not mount
drives above other drives or heat producing equipment. Fans or blowers should be used
to insure proper cooling in tight quarters.
In order to properly size an enclosure, the heat generated by the drive(s) must be known.
Refer to the HEAT LOSS column in Section 5.0, SCL/SCM RATINGS. An enclosure
manufacturer can then determine the required enclosure size based on the total heat
generated inside the enclosure (from the drive(s) and other heat sources), the maximum
allowable temperature inside the enclosure, the maximum ambient temperature outside
the enclosure, and the enclosure properties.
The SCL/SCM Series is UL approved for solid state motor overload protection. Therefore,
a separate thermal overload relay is not required for single motor applications.
6.1 Installation After a Long Period of Storage
STOP!
Severe damage to the drive can result if it is operated after a long period of storage
or inactivity without reforming the DC bus capacitors!
If input power has not been applied to the drive for a period of time exceeding three years
(due to storage, etc), the electrolytic DC bus capacitors within the drive can change
internally, resulting in excessive leakage current. This can result in premature failure of
the capacitors if the drive is operated after such a long period of inactivity or storage.
In order to reform the capacitors and prepare the drive for operation after a long period of
inactivity, apply input power to the drive for 8 hours prior to actually operating the motor.
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