Vaillant ecoMAX SERIES Instructions For Installation And Servicing

Also see for ecoMAX 613/2 E: Instructions for use Instructions for use Installation instructions Installation instructions

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Vaillant ecoMAX SERIES Instructions For Installation And Servicing Manual pdf 51 page image

51Parts replacement 9Instructions for installation and servicing ecoMAX 519 Parts replacementEnsure that ALL regulations are observed.9.1 Safety instructionsThe following safety instructions are to be followedwhen installing replacement parts!Important:Before starting any maintenance work:Isolate the mains electricity supply by dis-connecting the plug at the socket outlet (ifthere is only an isolating switch remove the fusefrom the switch).• Turn off the gas supply at the gas service valve fittedto the boiler.• When removing any water carrying components ensurethat water is kept away from all electrical components.• Always use new seals and O–rings when replacing parts.• Always test for gas soundness and always carry outfunctional checks after any service work and afterexchanging any gas carrying component.• Always check earth continuity, polarity and resistanceto earth with a multimeter after any service work andafter exchanging any electrical component.9.1.1 Initial preparation• Turn off the boiler.• Isolate the electrical supply to the boiler.• Remove boiler bottom cover.• Turn off the gas service valve.• Turn off the boiler CH service valves.• Turn off the cold water inlet service valve (ecoMAX 800).• Remove front case• Lower electronic control box.• Release central heating water pressure by draining theboiler from the drain points provided. (This needs onlyto be carried out when detailed in these instructions).• After installing replacement parts, recommission andcheck boiler function as described in commissioningsection.Note:The boiler is fitted with a combustion analysistest point. A suitable combustion analyser canbe connected at this point to establish the com-bustion performance of the boiler.9.1.2 Removal of burner assembly• Remove screw and disconnect air inlet pipe.• Disconnect gas supply from gas valve by undoing union.• Disconnect HT lead and earth lead from spark electrode.• Remove five nuts from burner manifold.• Disconnect two electrical connections from fan andgas valve.• Pull forward complete burner, gas valve and fan assembly.• Remove burner, gas valve and fan assembly from boiler.9.2 Replacement of burnerFig. 9.1 Replacing the burner• Turn off boiler.• Remove front casing.• Lower control box.• Remove burner, gas valve and fan assembly as pre-viously detailed.• Remove 4 screws (1) securing burner to burner manifold.• Fit new burner to manifold using the new sealing gas-ket supplied, ensuring that the notch in the burner ali-gns with the burner viewing window.• Reassemble in reverse order.• Recommission boiler as detailed.9.3 Replacement of fan• Turn off boiler.• Remove front casing.• Lower control box.• Remove burner, gas valve and fan assembly as pre-viously detailed.• Remove 4 screws (1).• Separate gas valve and fan assembly from burnermanifold (2).• Remove 2 screws (3) securing gas valve to fan.• Fit gas valve to new fan using the new sealing gasketsupplied.• Refit gas valve and fan assembly to burner manifoldusing the new sealing gasket supplied. Equally tightenthe four screws (1) to ensure a good seal is made.• Reassemble burner, gas valve and fan assembly inreverse order.• Recommission boiler as previously detailed.1