Ideal Boilers Istor HE260 Installation And Servicing Manual

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Ideal Boilers Istor HE260 Installation And Servicing Manual Manual pdf 42 page image

42 istor system store - Installation and ServicingSERVICING60 REPLACEMENT OF COMPONENTSGENERALWhen replacing ANY component in the boiler module.1. Isolate the electricity supply.2. Turn off the gas supply.3. Remove the boiler front panels. Refer to Frame .4. It may be necessary to remove the DHW expansion vessel.Refer to Frame 53.1. Refer to Frames 50 & 51.2. Remove the boiler front and sealing panels. Refer toFrame 53.3. Drain down the boiler. Refer to Frame 82.4. Unplug the electrical lead.5. Unscrew the thermistor.6. Fit the new thermistor using the sealing washer provided.7. Reassemble in the reverse order.8. Check the operation of the boiler.61 DRY FIRE REPLACEMENT62 FAN REPLACEMENT1. Refer to Frame 50 & 51.2. Remove the boiler sealing panel. Refer to Frame 53.3. Disconnect the electrical leads from the fan.4. Undo the gas pipe union connection to the injector housing.5. Remove the retaining screw and pull off the mounting bracket.6. Remove the fan and venturi assembly.7. Remove the 3 retaining screws and remove theventuri assembly, noting the orientation of theventuri in relation to the fan body.8. Transfer the venturi assembly to the new fan,replacing the gasket if evidence of damage ordeterioration is visible.9. Fit the new fan / venturi assembly.10. Re-assemble the boiler in reverse order takingcare not to overtighten the single retaining screwon the fan mounting bracket.11. Check the operation of the boiler. Refer to Frame 45.After replacing ANY component check operation of the boilerincluding gas soundness, gas rate and combustion test.IMPORTANT.When work is complete, if the sealing panel has beenremoved, it must be correctly refitted - ensuring that a goodseal is made.Notes.1. In order to assist fault finding, the control panel has anLED diagnostic display. The key to boiler fault conditionsis shown in Frame 95.2. In order to replace most of the components in Frames 76to 93 it is necessary to drain the boiler or cylinder. Referto Frames 82 & 83.THE BOILER MUST NOT BE OPERATED IF THE SEALING PANEL IS NOT FITTEDist8014SERVICING