Ideal Boilers Concord CXD 40-100 Installation & Servicing Manual

Contents

Ideal Boilers Concord CXD 40-100 Installation & Servicing Manual Manual pdf 27 page image

27Concord CXD - InstallationLEGEND1. Main gas inlet cock.2. Gas inlet union.3. Gas control valve.4. 'O' ring seal.5. Spark generator.38 GAS CONTROL VALVESERVICINGSERVICING40 BURNER AND CONTROLS ASSEMBLY - Exploded View - CXD 40-6039 MAIN BURNER1. Disconnect the electrical connections to the faulty gasvalve.2. Check that the gas inlet cock is OFF, unscrew the 4screws on the gas valve inlet flange, the 4 screws on theoutlet flange and remove the valve.3. If the valve has a brass restrictor fitted to its outlet,remove by unscrewing and refit into the new valve. It isimperative that the gas restrictor is fitted to the low-ratevalve.4. Replace the gas control valve and re-assemble in reverseorder, ensuring that the arrow indicating the direction offlow is in the correct position.5. Ensure that new ‘O’ ring seals are correctly placed ineach flange connection.6. Test for gas soundness.7. Recommission the appliance and set the manifoldpressures as described in Frames 22 and 23 or 24.1. Remove the NOx duct and burner front plate, aspreviously described in Frame 35.2. On the CXD 40, 50 & 60 remove the screws holding theHT heat shield from the LH leg of the combustionchamber. Raise slightly and withdraw the heat shield,taking care not to damage the leads.3. Each burner can be removed by sliding back, to clear theinjector, then lifting out. Disconnect the ignition leadsfrom the LH burner and the detection lead from the RHburner.4. Remove the 2 screws securing the electrode assemblyand heat shield to the LH burner bracket and the 2screws securing the detection electrode bracket to theRH burner.5. Reassemble in reverse order.IMPORTANT. Care must be taken to prevent damage to thecombustion chamber insulation when replacing burners.6. Burner manifold.7. Main injector, 3 off.8. Main burner (centre/RH), 2 off.9. Main burner (LH), 1 off.10. Ignition electrodes.11. Overheat thermostat generator mounting bracket.12. Overheat thermostat.13. Detection electrode assembly.14. HT leads heat shield.15. Gas pipe.PTP Pressure test point.