12
Lenze 13466147 EDBSM01 v19 EN
3 Installation
3 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 Americas 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 2.4, 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.
3.1
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.
