Danfoss VLT HVAC Basic Drive FC 100 Series Design Manual

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Danfoss VLT HVAC Basic Drive FC 100 Series Design Manual Manual pdf 9 page image

2 Introduction to VLT HVAC Basic Drive2.1 Safety2.1.1 Safety NoteWARNINGDANGEROUS VOLTAGEThe voltage of the frequency converter is dangerouswhenever connected to mains. Incorrect installation of themotor, frequency converter or fieldbus may cause death,serious personal injury or damage to the equipment.Consequently, the instructions in this manual, as well asnational and local rules and safety regulations, must becomplied with.Safety Regulations1. The frequency converter must be disconnectedfrom mains if repair work is to be carried out.Check that the mains supply has been discon-nected and that the necessary time has passedbefore removing motor and mains plugs.2. The [STOP/RESET] key on the LCP of thefrequency converter does not disconnect theequipment from mains and is thus not to be usedas a safety switch.3. Correct protective earthing of the equipmentmust be established, the user must be protectedagainst supply voltage, and the motor must beprotected against overload in accordance withapplicable national and local regulations.4. The earth leakage currents are higher than3.5mA.5. Protection against motor overload is set by1-90 Motor Thermal Protection. If this function isdesired, set 1-90 Motor Thermal Protection to datavalue [ETR trip] (default value) or data value [ETRwarning]. Note: The function is initialized at 1.16x rated motor current and rated motor frequency.For the North American market: The ETRfunctions provide class 20 motor overloadprotection in accordance with NEC.6. Do not remove the plugs for the motor andmains supply while the frequency converter isconnected to mains. Check that the mains supplyhas been disconnected and that the necessarytime has passed before removing motor andmains plugs.7. Check that all voltage inputs have been discon-nected and that the necessary time has passedbefore commencing repair work.Installation at high altitudesCAUTIONAt altitudes above 2km, please contact Danfoss regardingPELV.WARNINGUNINTENDED START1. The motor can be brought to a stop by means ofdigital commands, bus commands, references ora local stop, while the frequency converter isconnected to mains. If personal safety consider-ations make it necessary to ensure that nounintended start occurs, these stop functions arenot sufficient.2. While parameters are being changed, the motormay start. Consequently, the stop key [STOP/RESET] must always be activated; following whichdata can be modified.3. A motor that has been stopped may start if faultsoccur in the electronics of the frequencyconverter, or if a temporary overload or a fault inthe supply mains or the motor connection ceases.WARNINGDISCHARGE TIMETouching the electrical parts may be fatal - even after theequipment has been disconnected from mains.Also make sure that other voltage inputs have beendisconnected, load sharing (linkage of DC intermediatecircuit), as well as the motor connection for kinetic backup.The frequency converter DC link capacitors remain chargedafter power has been disconnected. To avoid an electricalshock hazard, disconnect the frequency converter from themains before carrying out maintenance. Wait at least asfollows before doing service on the frequency converter:Voltage (V) Power range (kW) Min. waiting time (min.)3 x 200 0.25 – 3.7 43 x 200 5.5 – 45 153 x 400 0.37 – 7.5 43 x 400 11 – 90 153 x 600 2.2 – 7.5 43 x 600 11 – 90 15Introduction to VLT HVAC Ba... VLT HVAC Basic Drive Design Guide8 MG.18.C2.02 - VLT® is a registered Danfoss trademark22