Vaillant ecoMAX pro 18E Instructions For Use Installation And Servicing

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Vaillant ecoMAX pro 18E Instructions For Use Installation And Servicing Manual pdf 19 page image

Instructions for Use, Installation and Servicing ecoMAX pro 19Electrical connections 1111.2 Electrical connections – testingCarry out preliminary electrical system checks as below:1. Test insulation resistance to earth of mains cable.2. Test the earth continuity and short circuit of cables.3. Test the polarity of the mains.When completed ensure the supply to the boiler is isolated.Danger!This appliance must be earthed.All system components must be of an approved type,and meet the requirements of the current IEE WiringRegulations, and in IE the current edition of the ETCIrules. Electrical components have been tested to meetthe equivalent requirement of the BEAB.Connection of the whole electrical supply must bethrough a common isolator.Isolation should preferably be by a double pole switchedfused spur box having a minimum contact separationof 3mm on each pole. The fused spur box should bereadily accessible and preferably adjacent to the boiler.It should be identified as to its use. A fused three pinplug and shuttered socket outlet may be used instead ofa fused spur box provided that:a) They are not used in a room containing a fixed bath orshower.b) Both the plug and socket comply with the currentissue of BS1363.Do not interrupt the mains supply with a time switch orprogrammer.Caution!This appliance must be wired in accordancewith these instructions. Any fault arising fromincorrect wiring cannot be put right under theterms of the Vaillant guarantee.11.1 Appliance, pump and external controls.ecoMAX pro boilers are fitted with a terminal box locatedat the base of the boiler into which all connections aremade. To gain access to the terminal box, remove thetwo retaining screws indicated in fig 11.1 and carefullylower to reveal the terminal strip inside.Disconnect and remove the test cable from the terminalstrip and discard.Connect both the mains supply and switched live fromthe external controls (room thermostat and, if applicable,frost thermostat) into the marked terminals as shown infigs 11.2 and 16.3.Connect the pump supply into the marked pumpterminals as shown in figs 11.2 and 16.3.Note!The boiler incorporates a pump overrunthermostat. Only feed the pump from themarked terminals in the terminal box on theboiler, not from a separate supply.Observe all terminal markings and colour codes shownin fig 11.2.Ensure that all flexible cords are routed through thestrain relief cable glands on the inlet of the terminal box.Refit the terminal box to the underside of the boiler usingthe two retaining screws.Fig 11.1 12953Fig 11.2CONNECTIONBOXRETAININGSCREWS (2)13113