Vaillant ecoTEC VU 466/4 Installation And Maintenance Instructions Manual

Also see for ecoTEC VU 466/4: Installation manual Operating manual

Contents

Vaillant ecoTEC VU 466/4 Installation And Maintenance Instructions Manual Manual pdf 16 page image

Installation and maintenance instructions ecoTEC 0020029172_0316The low loss header ensures, in conjunction with theboiler circulation pump, that a sufficiently high minimumquantity of water is always circulating through theboiler.5.3 Heating mode and cylinder charging modeh Note!Also observe Chapters 5.1 and 5.2 of thismanual.The combination of heating mode and cylinder chargingmode of the boiler can not be equated with eitherheating mode or cylinder charging mode.Other hydraulic relationships must be taken intoaccount in order to ensure faultless operation.The boiler is uncoupled from the consumer circuits bythe low loss header. This means that the circuitsdownstream of the low loss header can be designedaccording to individual requirements (pump dimension,cylinder position).Hydraulic schematic drawing:Cylinder priority switching and heating circuit via lowloss header123456Fig. 5.6 Cylinder priority switching and heating circuit via lowloss headerLegend:1 Boiler with internal pump2 Low loss header3 External heating pump4 Consumer (e.g. heating circuit)5 External cylinder charging pump6 CylinderOne direct heating circuit and one hot water cylinder(including charging pump and non-return valve) can beconnected downstream of the low loss header to theecoTEC boiler without additional equipment. If additionalheating circuits are required this can be achieved withthe use of optional controllers and hydraulic accessories(e.g. VRC630). The available pump head from the boilercirculation pump is sufficient to pump water around theboiler circuit between the boiler and low loss header. Allheating circuits and hot water cylinder configurationscan be connected downstream of the low loss header.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.98 543NLX6X11X18 X13X14 12Fig. 5.7 Electrical connection for cylinder charging pump andexternal heating pumpLegend:1 Plug-in location for cylinder charging pump2 Plug-in location for external heating pumpUse the relevant mounted ProE plug to perform theelectrical connection.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.To assign the "external heating pump" function to thegrey plug (2) (additional relay) the value "2" must bespecified at diagnosis point "d.26" in the 2 nd diagnosislevel, see Chapter 9.1.2.5 Installation