Vaillant geoTHERM VWS Installation Instructions Manual

Also see for geoTHERM VWS: Operating manual Installation instructions Operating manual

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Vaillant geoTHERM VWS Installation Instructions Manual Manual pdf 6 page image

Installation instructions geoTHERM VWS/VWW 0020051574_0162.2 Functional principleHeat pump systems consist of separate circuits in whichliquids or gases transport the heat from the heat sourceto the heating system. As these circuits operate withdiffering media (brine/water, coolant and heatingwater), they are coupled to one another by means ofheat exchangers. In these heat exchangers the heatpasses from a medium at a high temperature to a medi-um at a lower temperature.The Vaillant geoTHERM heat pump can be supplied fromdifferent heat sources such as, e.g. geothermal heat(geoTHERM VWS) or ground water (geoTHERM VWW).3/4 Environmental energy 4/4 Heating energy1/4 Electrical energyFig. 2.2 Using a geothermal heat sourceAdditionalheatingDomestichot water cylinderHeating water circuitHeat source circuitCoolant circuitHot waterCold waterSwitching valveHeating water pumpCondenserHeat sourceBrine pumpEvaporatorCompressorExpansion valve2134Heating systemFig. 2.3 Principle of operation of the heat pumpThe system consists of separate circuits which are cou-pled to one another by means of heat exchangers.These circuits are:- The heat source circuit, by means of which the energyfrom the heat source is transported to the coolant cir-cuit.- The coolant circuit, which releases its heat to theheating water circuit by means of evaporation, com-pression, liquefaction and expansion.- The heating water circuit, which supplies the heatingand the hot water generation for the domestic hotwater cylinder.The coolant circuit is connected by means of the evapo-rator (1) to the environmental heat source, from which itextracts thermal energy. At the same time, the physicalstate of the coolant changes; it evaporates. The coolantcircuit is connected by means of the condenser (3) tothe heating system, to which it releases the heat again.In so doing, the coolant becomes liquid again; it con-denses.As thermal energy can only pass from a body at a high-er temperature to a body at a lower temperature, thecoolant in the evaporator must have a lower tempera-ture than the environmental heat source. On the otherhand, the temperature of the coolant in the condensermust be higher than that of the heating water in orderto be able to release the heat to it.2 Description of the appliance