Ideal Boilers Optia HE 9 Installation And Servicing Instructions

28 Optia HE - Installation & ServicingINSTALLATIONExternal wiring must be in accordance with the current I.E.E. (BS7671) Wiring Regulations. For Ireland reference should be madeto the current ETCI rules for electrical installations.The wiring diagrams illustrated in Frames 43-46 cover thesystems most likely to be fitted to this appliance.For wiring external controls to the Optia HE boiler, referenceshould be made to the system wiring diagrams supplied by therelevant manufacturer, in conjunction with the wiring diagramsshown in Frames 43-46.Difficulty in wiring should not arise, providing the followingdirections are observed:1. Controls that switch the system on or off, e.g. a time switch,must be wired, in series, in the live mains lead to the boiler.2. Controls that override an on/off control, e.g. frost thermostat,must be wired into the mains lead, in parallel, with thecontrol(s) to be overridden. Refer to Frame 46.3. If a proprietary system is used, follow the instructionssupplied by the manufacturer.4. System designs featuring controls or wiringarrangements which allow the boiler to fire when there isno pump circulation taking place should not be fitted.Advice on required modifications to the wiring may beobtained from the component manufacturers.Notes.1. Connection between a frost thermostat and the timecontrol should be made without disturbing other wiring.2. A frost thermostat should be sited in a cool place in thehouse, but where it can sense heat from the system.42 EXTERNAL CONTROLScla7738LimitthermostatO/heat thermostatThermostat sensorL brbrLOn/Off switchALL EARTHS must be connected(Not all earths are shown for clarity)Air pressureswitchFlue protectionthermostatcla7856Combined spark &sensing electrodePotentiometerL NTCNCNCNOP.C.B. 25GV 1GV 2FANEMain gasPilot gasFanbbConnecttogybkbror pkwy/gNbk bkNONCcom bk bkrryv41 ELECTRICAL CONNECTIONSLEGENDb bluebk blackbr browngy greyor orangeWARNING. The appliance must be efficiently earthed.A mains supply of 230 V ~ 50 Hz is required.All external controls and wiring must be suitable for mainsvoltage. Wiring should be in 3-core PVC insulated & sheathedcable, not less than 0.75mm 2 (24 x 0.2mm) to BS. 6500 Table16 Wiring Regulations and local regulations. For IE referenceshould be made to the current ETCI rules for electricalinstallations.Connection must be made in a way that allows completeisolation of the electrical supply - such as a double poleswitch, having a 3mm (1/8") contact separation in both polesor a plug and socket, serving only the boiler and systemcontrols. The means of isolation must be accessible to theuser after installation.1. Remove controls pod by slackening front fixing screwsand pull pod forward (may find it easier to remove thecontrols pod door).2. Remove the control box securing screws. Swing thebox down into the servicing position. Refer to Frame 49.Flow wiring diagrampk pinkr redv violetw whitey/g yellow/greencla7923213. Route the mains cable into the box from the RHS of theboiler.4. Connect the live, neutral and earth wires into the terminalstrip as shown.5. Secure the mains lead with the cable clamp.6. On completion of all wiring connections, relocate the controlbox and secure.INSTALLATION