Ideal Boilers Optia HE 9 Installation And Servicing Instructions

Optia HE - Installation & Servicing 35SERVICINGMAIN BURNERAfter any servicing, reference should be made to Table 2which quotes details of the rated output with the relatedburner setting pressure and the heat input. Any requiredadjustments should be made by using the pressureadjustment screw.Refer to 'initial Lighting', Frame 48.REPLACEMENT OF PARTS61 GENERALWhen replacing any component:1. Isolate the electricity supply.2. Turn OFF the gas supply.3. Remove the boiler front panel. Refer to Frame 53.IMPORTANT. When work is complete the casing must becorrectly refitted, ensuring that a good seal is made.60 GAS PRESSURE ADJUSTMENTcla7872PILOTThe pilot is factory set to maximum and no furtheradjustment is possible. If, after removing and checking theinjector (as detailed in Frame 67) and ensuring that thereis an inlet pressure of 20 mbar available, the pilot does notlight then contact the Optia HE Helpline: 0870 849 8057.Relight in accordance with 'Initial Lighting', Frame 48.Note. In order to assist fault finding, the control box printedcircuit board is fitted with 2 indicator lights which represent thefollowing boiler conditions:Neon I3. Mains electricity ON.Neon SG1. Flashes to indicate ignition operation (stops afterdetection).The boiler MUST NOT be operated if the casing is not fitted.1. Refer to Frame 61.2. Unfasten the 2 nuts and washers holding the sightglass assembly to thecasing front panel.3. When fixing the new assembly ensure that the parts are in the correctorder. The frame must have the return edge at the bottom.4. Retighten the 2 nuts to ensure an airtight seal. Do NOT overtighten.5. Replace the boiler front panel. Refer to Frame 49 .59 REASSEMBLY62 SIGHTGLASS REPLACEMENTReassemble the boiler in the following order.1. Refit the flue baffles.2. Inspect the collector hood rope gasket and replace, ifnecessary, ensuring that the self adhesive rope is fittedcentrally on to the lip of the collector hood / fan assembly.The boiler efficiency will be adversely affected if incorrectlyfitted. Refit the collector hood and retain with the 2 front andside tie rods. Tighten the nuts and screw. Ensure that thesealing gasket is compressed.3. Refit the fan, fan electrical connections, the thermostatelectrical connections, the red pressure sensing pipe, theblue CO/CO 2 sensing pipe and the two fan fixing screws.4. Refit the air box assembly and burner. Ensure that theburner front fixing is refitted.5. Refit the combustion chamber, (replacing the rope seal ifnecessary) ensuring the two rubber sealing grommets arereplaced.6. Reconnect the gas supply and the electrical wiring. Refer toFrames 36 & 41.7. Check the sightglass in the boiler casing. Clean or renewas necessary. Refer to Frame 62.8. Check for gas soundness. Check the gas service cock andpressure test point.9. Refit the boiler casing (refer to Frame 49). Note that it is notnecessary to disturb the controls casing pod.10. Close the controls pod door.58 CLEANING THE SIPHON1. Pull the heat shield forwardto remove from clips.2. Unscrew the siphon unionconnection.3. Remove the rubber sumpconnection pipe and theblockage sensing pipe.4. Remove the two siphonretaining screws and remove siphon.5. Thoroughly clean the siphon.6. Recharge the siphon with water.7. Re-assemble in reverse order. Ensuring the rubber sumpconnection pipe and blockage sensing pipe are correctly replaced.1423SERVICING