Vaillant ecoTEC exclusive 832 Installation And Maintenance Instructions Manual

Also see for ecoTEC exclusive 832: Installation and maintenance instructions Installation and maintenance instructions

Contents

35ecoTEC exclusive installation and maintenance instructions / 0020017768_048.3 Filling/draining the heating installation8.3.1 Filling the unit and heating installationThe filling of the appliance and the heating system is de-scribed in Section 6.1.8.3.2 Draining the unit• Close the maintenance cocks (if fitted) on the appliance.• Open the drain valves on the maintenance cocks.8.3.3 Draining the entire installation• Attach a hose to the filling/draining cock on the system.• Bring the open end of the hose to an appropriatedrain point.• Check that the maintenance cocks of the boiler areopen.• Open the filling/drain cock.• Open the bleed valves on the radiators.Start at the highest radiator and then work from thetop to the bottom.• When the water has drained out of the heating sys-tem, close the bleeding valves on the radiators andclose the filling/drain cock again.8.4 Servicing the compact thermal module8.4.1 Dismantle compact thermal moduleThe compact thermal module consists of a speed-con-trolled fan, the gas fitting, the gas mixer pipe for the fanpre-mix burner and the pre-mix burner itself. These fourindividual parts form the compact thermal module com-ponent.d Danger!Danger of explosion through gas leakage!The mixer tube between the gas control unitand burner must not be opened. It can only beguaranteed that this component is gas-tightafter it has been inspected at the factory.d Danger!There is danger of being burned or scalded atthe compact thermal module and at all compo-nents carrying water. Only carry out work onthese components once they have cooled down.Proceed as follows to dismount it:• Turn the appliance off on the main switch.• Isolate the unit from the electrical mains.• Cut off the gas supply to the device.• Close the maintenance cocks on the appliance.• Remove the front cover from the device.• Swing off the electronic box.543216Fig. 8.1 Dismantling compact thermal module• Remove the screw (3) and remove the air inlet pipe (1)from the inlet spigot on the gas fitting.• Separate the gas supply pipe (6) on the gas fitting.Secure the gas corrugated pipe against twisting bybracing the pipe on the wrench surface while loosen-ing the union nut.a Caution!Damage to the gas pipe!Under no circumstance may the compactthermal module be suspended from the flexiblecorrugated gas pipe.• Pull the two plugs of the ignition und grounding linesoff the ignition electrode (4).• Only ecoTEC exclusive 832: Pull the cable plug off thefan motor and the cable off the gas fitting.Only ecoTEC exclusive 838: Open the mains couplingto the fan.• Undo the five nuts (2).• Pull the entire compact thermal module (5) off theheat exchanger.• After dismantling the burner and the heat exchanger,check for damage and dust and, if necessary, cleanthe components as described below.Inspection and maintenance 8