Vapac LR10 Operation Manual
Also see for VapaNet Series: Operation manual
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Contents
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91.4 Electrical Connections1.4.1 Important E.M.C. ConsiderationsUse a dedicated, earthed metal conduit for both thecontrol signal cable and the security circuit cablesalong their entire length - they may share the sameconduit where practicable. The earth must be madeby "metal-to-metal" contact and should be a goodRF (Radio Frequency) earth.The control and security circuit connections shouldbe run in screened cable with the screen groundedat the VAPANET end (onto the electrical sectionback panel). The screen should be maintained asclose as possible to the cable ends and any tailbetween the screen and the earth point must bekept short (50 mm maximum).Control Cable / Security CircuitConduit Entry ArrangementControl Cable / Security CircuitScreening ArrangementTail to be kept short(less than 50mm)Cables to control terminalsScreen left intactOuter insulationEarthed back panelImportant Power Connection InformationVapac 24V and 9 V secondary Transformer Primary supply connections:Vapac units are wired to allow connection to alternative site Voltages.Make the following simple checks before connecting the power supply:-Move the RED connection on the VAPANET transformer primary winding circuit to theposition marked with the supply Voltage that is to be connected between VAPANETpower terminals A1 and A2.The transformer primary circuit terminal positions are clearly marked:- 200V, 230V,380, 415 & 440V. If the actual (measured) site voltage is 400v the preferredtapping is 380V. The transformer is fitted below the Drain tray, and is accessible byremoving two screws and the cover, which should be slid it towards you.Note:24 V a.c. Control circuit -9 V a.c. PCB Circuit -Transformer Primary Circuit -And RDU.230V ac Pump Supply. -6.3 A 20 mm (T – Time Lag) fuse (Pt.No. 1080093) mounted on VAPANETEchelon PCB (Pt.No.1150630).2 A 20 mm (F - Quick blow) fuse (Pt No. 1080099) mounted on the VAPANETEchelon PCB (Pt, No. 1150630).Two fuses protect the control circuit on Single cylinder units F1 2.0A (slow blow)(Pt. No. 1080095) mounted in fuse-terminal holder protects Primary transformerand RDU unit if fitted. F2 500 mA 20 mm (F - Quick blow) fuse (Pt No. 1080054)mounted in fuse-terminal holder protects Transformer Primary and Pump or bothpumps if two pumps are fitted.The pump or pumps on twin cylinder units are fed from the main transformer via a230 volt auto winding. The pumps are protected by fuse F1 and F2 above feedingthe transformer primary.All metal surfaces which comeinto contact with each other,must be free of paint, grease,dirt, etc., thereby ensuring agood low impedance R.F.(Radio Frequency) path toground.Electrical section metalworkMetal conduit |
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