Vaillant ecoTEC VU 466/4 Installation And Maintenance Instructions Manual

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Vaillant ecoTEC VU 466/4 Installation And Maintenance Instructions Manual Manual pdf 15 page image

15Installation and maintenance instructions ecoTEC 0020029172_03Hydraulic schematic drawing:Heating circuit connection using low loss header1234Fig. 5.2 Heating circuit connection using low loss headerLegend:1 Boiler with internal pump2 Low loss header3 External heating pump4 Consumer (e.g. heating circuit)98 543NLX6X11X18 X13X141Fig. 5.3 Electrical connection for heating pump downstream ofthe low loss headerThe settings for the internal pump are made at thefactory. The pump output does not require adjustment.Use the grey ProE plug to establish the electricalconnection with the external heating pump.To assign the "external heating pump" function to theplug (1) (additional relay) diagnosis point "d.26" in the2nd diagnosis level must be set to the value "2", seeChapter 9.1.2.The low loss header ensures, in conjunction with theboiler circulation pump, that a sufficiently high minimumquantity of water is always circulating through theboiler.5.2 Cylinder charging modeThe electronics of the ecoTEC are designed in such away that one cylinder charging circuit and one heatingcircuit can be connected directly without the need foraccessories.The charging circuit connection downstream of the lowloss header enables the choice of an individual cylindersize and of a charging pump.h Note!Observe that non-return valves or mixercircuits may be required in order to eliminatecross-flow to other circuits or the effects ofhigh temperatures from the charging circuit.Hydraulic schematic drawing:Cylinder priority switching via low loss header1234Fig. 5.4 Cylinder priority switching via low loss headerLegend:1 Boiler with internal pump2 Low loss header3 External heating pump4 Consumer (e.g. charging circuit)98 543NLX6X11X18 X13X14 1Fig. 5.5 Electrical connection for cylinder charging pumpUse the mounted ProE plug (1) to establish the electricalconnection for the cylinder charging pump.The pink plug-in location X6 (1) on the PCB is reservedfor the cylinder charging pump. It is not necessary to dosettings at any diagnosis point.Installation 5