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

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Danfoss VLT AQUA Drive FC 202 Operating Manual Manual pdf 15 page image

4.4 Operating EnvironmentIn environments with airborne liquids, particles, orcorrosive gases, ensure that the IP/Type rating of theequipment matches the installation environment. Forspecifications regarding ambient conditions, seechapter 9.4 Ambient Conditions.NOTICECONDENSATIONMoisture can condense on the electronic componentsand cause short circuits. Avoid installation in areassubject to frost. Install an optional space heater whenthe drive is colder than the ambient air. Operating instandby mode reduces the risk of condensation as longas the power dissipation keeps the circuitry free ofmoisture.NOTICEEXTREME AMBIENT CONDITIONSHot or cold temperatures compromise unit performanceand longevity.• Do not operate in environments where theambient temperature exceeds 55 °C (131 °F).• The drive can operate at temperatures down to-10 °C (14 °F). However, proper operation atrated load is only guaranteed at 0 °C (32 °F) orhigher.• Extra air conditioning of the cabinet or instal-lation site is required if temperature exceedsambient temperature limits.4.4.1 GasesAggressive gases, such as hydrogen sulphide, chlorine, orammonia can damage the electrical and mechanicalcomponents. The unit uses conformal-coated circuit boardsto reduce the effects of aggressive gases. For conformal-coating class specifications and ratings, seechapter 9.4 Ambient Conditions.4.4.2 DustWhen installing the drive in dusty environments, payattention to the following:Periodic maintenanceWhen dust accumulates on electronic components, it actsas a layer of insulation. This layer reduces the coolingcapacity of the components, and the components becomewarmer. The hotter environment decreases the life of theelectronic components.Keep the heat sink and fans free from dust buildup. Formore service and maintenance information, refer tochapter 8 Maintenance, Diagnostics, and Troubleshooting.Cooling fansFans provide airflow to cool the drive. When fans areexposed to dusty environments, the dust can damage thefan bearings and cause premature fan failure. Dust also canaccumulate 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 (ATEX95) 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 protectionDoes 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, instal-lation 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.Mechanical Installation Operating GuideMG22A102 Danfoss A/S © 01/2017 All rights reserved. 134 4