N O T I C EMOTOR THERMISTOR SENSOR MONITORINGVLT® AutomationDrive units with the VLT® PTC Thermistor Card MCB 112 option are PTB-certified for potentially explosiveatmospheres.4.5 Installation RequirementsN O T I C EOVERHEATINGImproper 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.4.6 Cooling RequirementsN O T I C EOVERHEATINGImproper 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 4.7 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 sealevel. 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 approximately90% 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:• Duct cooling.• Back-wall cooling.Mechanical InstallationOperating Guide | VLT® AutomationDrive FC 302AQ275652476278en-000101 / 130R0709| 25Danfoss A/S © 2019.12
