Ideal Boilers Istor HE260 Installation And Servicing Manual

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Ideal Boilers Istor HE260 Installation And Servicing Manual Manual pdf 31 page image

31istor system store - Installation and ServicingINSTALLATION39 EXTERNAL ELECTRICAL CONTROLSWiring External to the BoilerThe fuse rating should be 3A.Wiring external to the boiler MUST be in accordance with thecurrent I.E.E. (BS.7671) Wiring Regulations and any localregulations. For IE reference should be made to the currentETCI rules for electrical installations.Room ThermostatIf the thermostat has a neutral connection, use it (it providesfor more energy efficient operation by reducing switchingtemperature differentials).Frost ProtectionIf parts of the pipework run outside the house or if the boilerwill be left off for more than a day or so then a frost thermostatshould be wired into the system.The frost thermostat should be sited in a cold place butwhere it can sense heat from the system.Note.If the boiler is installed in a garage it may be necessary to fita pipe thermostat, preferably on the return pipework.Wiring should be as shown, with minimal disturbance toother wiring of the controls.Designation of the terminals will vary but the programmerand thermostat manufacturers' leaflets will give full details.Diagram A shows an application to boilers fitted with a roomthermostat only.Earths are not shown for clarity but must never be omitted.External ProgrammerIf a remote programmer is used remove link and wireswitched live outs from programmer into terminal blockshown.INSTALLATION