Motors with class d/e protection
The motor itself has an e ignition protection class, while the motor cabling and connection environment are in compliance with the d
classification. To attenuate the high peak voltage, use a sine-wave filter at the drive output.
NOTICE
MOTOR THERMISTOR SENSOR MONITORING
Units with the VLT® PTC Thermistor Card MCB 112 option are PTB-certified for potentially explosive atmospheres.
4.4 Installation Requirements
NOTICE
OVERHEATING
Improper mounting can result in overheating and reduced performance.
-
Install the drive according to the installation and cooling requirements.
• Locate the unit as near to the motor as possible. See 9.5 Cable Specifications for the maximum motor cable length.
• Ensure unit stability by mounting the unit to a solid surface.
• Enclosures E3h and E4h can be mounted:
- Vertically on the back plate of the panel (the typical installation).
- Vertically upside down on the back plate of the panel. Consult the factory.
- Horizontally on its back, mounted on the back plate of the panel. Consult the factory.
- Horizontally on its side, mounted on floor of the panel. Consult the factory.
• Ensure that the strength of the mounting location supports the unit weight.
• Ensure that there is enough space around the unit for proper cooling. Refer to 9.9 Enclosure Airflow.
• Ensure enough access to open the door.
• Ensure cable entry from the bottom.
4.5 Cooling Requirements
NOTICE
OVERHEATING
Improper mounting can result in overheating and reduced performance.
-
Install the drive following the installation and cooling requirements.
• Ensure that top and bottom clearance for air cooling is provided. Clearance requirement: 225 mm (9 in).
• Provide sufficient airflow flow rate. See 4.6 E1h-E4h Airflow Rates.
• Consider derating for temperatures starting between 45 °C (113 °F) and 55 °C (131 °F) and elevation 1000 m (3300 ft) above sea
level. For more information, see the product-specific design guide.
The drive utilizes a back-channel cooling concept that removes heat sink cooling air. The heat sink cooling air carries approximately
90% of the heat out of the back channel of the drive. Redirect the back-channel air from the panel or the room by using either:
Mechanical Installation
Operating Guide | VLT® Refrigeration Drive FC 103
AQ275652766279en-000101 / 130R0707
24 | Danfoss A/S © 2020.01
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