Vaillant ecoTEC VU 466/4 Installation And Maintenance Instructions Manual

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Contents

Vaillant ecoTEC VU 466/4 Installation And Maintenance Instructions Manual Manual pdf 38 page image

Installation and maintenance instructions ecoTEC 0020029172_03388.2 Filling/draining the boiler and heatinginstallation8.2.1 Filling the boiler and the heating installationA description of how to fill the boiler and heatinginstallation is provided in Chapter 6.2.8.2.2 Draining of the boiler• Close the service valves of the boiler.• Open the drain valves on the service valves.• Open the automatic air vent on the air separator toallow the boiler to drain completely.8.2.3 Draining the entire system• Attach a hose to the draining device on the system.• Bring the open end of the hose to an appropriatedrain point.• Make sure that the service valves of the boiler areopen.• Open the drain valve.• Open the bleeding valves of the radiators.Start from the highest radiator and then work fromthe top to the bottom.• Once the water has drained off, close the bleedingvalves of the radiators and the drain valve.8.3 Maintenance of the compact thermal module8.3.1 Dismounting the compact thermal moduleThe compact thermal module consists of the speedcontrolled fan, the gas/air combination valve, the gasfeed (mixture pipe) to the fan premix burner and thepremix burner itself. These four individual parts form thecompact thermal module component.H Danger!Danger of burning or scalding!There is danger of being burned or scalded atthe compact thermal module and at all water-carrying components. Only carry out work onthese components once they have cooled down.To dismount the compact thermal module proceed asfollows:• Turn off the boiler by the main switch.• Isolate the boiler from the electrical mains.• Cut off the gas supply to the boiler.• Remove the front casing of the boiler.• Swing off the electronic box.123Fig. 8.2 Removing air intake pipe• Remove the screw (2) and remove the air intake pipe(1) from the intake stub.• Disconnect the gas supply line (3) at the gas valve. Toprevent the corrugated gas pipe from twisting whenloosening the cap nut, hold up the pipe at the spannerflat.8 Inspection and maintenance