Vaillant ecoTEC plus 937 Instructions And Maintenance Instructions

Also see for ecoTEC plus 937: Operating manual Instructions for installation and servicing Operating manual

Contents

Installation and maintenance instructions ecoTEC plus 0020031552_03427.2.2 Cleaning the integral condensation heat-exchangera Caution!Protect the electronics box from water splashes.3412Fig. 7.3 Cleaning the heat-exchanger• Dismantle the compact thermo module as describedunder 7.2.1.a Caution!Danger of damage to the primary heat-exchanger!Do not attempt to release or tighten the fourscrews (1).After removal of the burner and fan assembly you cancheck the primary heat-exchanger (4).• Remove the loose deposits from the heating coils (3)with a soft brush and a jet of water. Make sure thatwater is kept away from all electrical components. Thewater used to clean the primary heat-exchanger runsaway through the condensate siphon. Avoid pointingthe water jet directly at the insulating surface (2) onthe back of the heat exchanger.If necessary, the heat-exchanger can be cleaned usingordinary vinegar.7.2.3 Checking the burnerThe burner (1) is maintenance-free and needs no cleaning.• Check the surface of the burner for damage. If neces-sary, replace the burner.• After checking or replacing the burner re-fit the ther-mo-compact module as described in Section 7.2.4.1Fig. 7.4 Checking the burner7.2.4 Fitting the thermo-compact module1Fig. 7.5 Replacing the burner door gasket• Insert a new gasket (1) in the burner door.a Caution!The burner door gasket (1) and the self-lockingnuts on the thermo-compact module must bereplaced every time the module is removed (e.g.during maintenance, see Table 7.1). If the burn-er flange insulation on the thermo-compactmodule shows any signs of damage or is show-ing small cracks it must also be replaced.109456Fig. 7.6 Fitting the thermo-compact module7 Inspection and maintenance 7