Vaillant ecoTEC plus VU Series Installation And Maintenance Instructions Manual

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Vaillant ecoTEC plus VU Series Installation And Maintenance Instructions Manual Manual pdf 22 page image

7 Adapting the unit to the heating installation22 Installation and maintenance instructions ecoTEC plus 0020029173_047. Re-fill the system until the system design pressure of0,1 MPa (1,0 bar) is attained.NoteThe actual reading on the digital pressuregauge should ideally be 0,05 MPa (0,5 bar)plus an additional pressure correspondingto the highest point of the system above thebase of the boiler – 10 m head equals an ad-ditional 1 bar reading on the pressure gauge.The minimum pressure should not be lessthan 0,1 MPa (1 bar) in any installation. Ifthe system is to be treated with an inhibitor itshould be applied at this stage in accordancewith the manufacturer’s instructions. Furtherinformation can be obtained from Sentinel,Betz Dearborn Ltd., Tel: 0151 420 9595, orFernox, Alpha– Fry technologies. Tel: 08708700362.8. Install the front casing. (→ Page 11)7 Adapting the unit to the heatinginstallation7.1 Calling up diagnostics codesYou can use the parameters that are marked as adjustablein the overview of diagnostics codes to adapt the product tothe heating installation and the needs of the customer.Overview of diagnostics codes (→ Page 30)+▶ Press and below the display at the same time.◁ The display shows D.0 (heating partial load).▶ Press .◁ The display shows the associated diagnostics inform-ation.▶ If required, use or to change the value (the displayflashes).▶ Save the new value by pressing and holding for ap-prox. five seconds until the display no longer flashes.+▶ Exit Diagnostics mode by pressing and at thesame time or by not pressing any button for four minutes.◁ The current heating flow temperature appears in thedisplay.NoteIf you activate the installer level (second dia-gnostics level), all of the diagnostics codes arevisible and accessible.7.2 Calling up the installer level (seconddiagnostics level)▶ In the first diagnostics level, scroll to D.97.▶ Change the displayed value to 17 (password).▶ Save the setting.7.3 Setting the heating partial loadThe product's heating partial load is set to 46 kW at the fact-ory. You can specify a value that corresponds to the productoutput in kW under diagnostics code D. 0.7.4 Setting the pump overrun and pumpoperating modeYou can set the pump overrun under D.1 (default setting: 5min.).You can set the overrun behaviour of the pump to a differentmode under D.18.Overrun: After ending the heating demand, the pump over-runs the time that is set under D.1.Continuous: The pump is switched on if the rotary knob forsetting the heating flow temperature is not at the left-handstop and the heat requirement is enabled by an external con-troller.Intermittent: This pump operating mode is useful for remov-ing residual heat after charging when the heat demand is ex-tremely low and large temperature differences exist between