Danfoss VLT AQUA Drive FC 202 Operating Manual

Also see for VLT AQUA Drive FC 202: Service guide Installation guide Installation guide Operating guide Installation guide

Contents

can accumulate on fan blades causing an imbalance whichprevents the fans from properly cooling the unit.4.4.3 Potentially Explosive AtmospheresWARNINGEXPLOSIVE ATMOSPHEREDo not install the drive in a potentially explosiveatmosphere. Install the unit in a cabinet outside of thisarea. Failure to follow this guideline increases risk ofdeath or serious injury.Systems operated in potentially explosive atmospheresmust fulfill special conditions. EU Directive 94/9/EC(ATEX 95) classifies the operation of electronic devices inpotentially explosive atmospheres.• Class d specifies that if a spark occurs, it iscontained in a protected area.• Class e prohibits any occurrence of a spark.Motors with class d protectionDo not require approval. Special wiring and containmentare required.Motors with class e protectionWhen combined with an ATEX–approved PTC monitoringdevice like the VLT® PTC Thermistor Card MCB 112, theinstallation does not need an individual approval from anapprobated organization.Motors with class d/e protectionThe motor itself has an e ignition protection class, whilethe motor cabling and connection environment is incompliance with the d classification. To attenuate the highpeak voltage, use a sine-wave filter at the drive output.When using a drive in a potentially explosiveatmosphere, use the following:• Motors with ignition protection class d or e.• PTC temperature sensor to monitor the motortemperature.• Short motor cables.• Sine-wave output filters when shielded motorcables are not used.NOTICEMOTOR THERMISTOR SENSOR MONITORINGDrives with the VLT® PTC Thermistor Card MCB 112option are PTB-certified for potentially explosiveatmospheres.4.5 Installation and Cooling RequirementsNOTICEMOUNTING PRECAUTIONSImproper mounting can result in overheating andreduced performance. Observe all installation andcooling requirements.Installation requirements• Ensure unit stability by mounting vertically to asolid flat surface.• Ensure that the strength of the mounting locationsupports the unit weight. Refer tochapter 3.2 Power Ratings, Weight, and Dimensions.• Ensure that the mounting location allows accessto open the enclosure door. Seechapter 10.8 Fastener Tightening Torques.• Ensure that there is adequate space around theunit for cooling airflow.• Place the unit as near to the motor as possible.Keep the motor cables as short as possible. Seechapter 10.5 Cable Specifications.• Ensure that the location allows for cable entry atthe bottom of the unit.Cooling and airflow requirements• Ensure that top and bottom clearance for aircooling is provided. Clearance requirement:225 mm (9 in).• Consider derating for temperatures startingbetween 45 °C (113 °F) and 50 °C (122 °F) andelevation 1000 m (3300 ft) above sea level. Seethe product-specific design guide for detailedinformation.The drive uses back-channel cooling to circulate the heatsink cooling air. The cooling duct carries approximately90% of the heat out of the back channel of the drive.Redirect the back-channel air from the panel or room byusing:• Duct cooling. Back-channel cooling kits areavailable to direct the air away from the panelwhen an IP20/chassis drive is installed in a Rittalenclosure. Use of a kit reduces the heat in thepanel and smaller door fans can be specified onthe enclosure.• Cooling out the back (top and base covers). Theback-channel cooling air can be ventilated out ofthe room so that the heat from the back channelis not dissipated into the control room.Mechanical Installation VLT® AQUA Drive FC 20218 Danfoss A/S © 09/2018 All rights reserved. MG21A50244