Vaillant geoTHERM Installation Instructions Manual

Also see for geoTHERM SERIES: System Installation Instructions Installation and servicing Instructions for use Operating instructions

Contents

Installation14 Installation instructions geoTHERM 0020051574_0444 Installation4.1 Requirements for the installation site> Choose a dry room that is frost-proof and where thetemperature does not fall below 7 °C and does notexceed a maximum of 25 °C.> Note that the installation room must have a minimumvolume. In accordance with DIN EN 378 T1, the minimumsize of the installation room (Vmin) for heat pumps is cal-culated as follows:Vmin = G/cG = coolant filling quantity in kgc = practical limit value in kg/m 3(for R 407 C, c = 0.31 kg/m3)This therefore results in the following minimum installa-tion space:Heat pump type Coolant fillingquantity [kg]Minimum installa-tion space [m 3]VWS 220/2VWW 220/24.14.313.213.9VWS 300/2VWW 300/2 5.99 19.3VWS 380/2VWW 380/2 6.7 21.6VWS 460/2VWW 460/2 8.6 27.74.1 Minimum size of the installation space for the heat pump> Ensure that the required minimum clearance can bemaintained.> When selecting the installation site, you must take intoconsideration that when the heat pump is in operation, itwill carry vibrations over to the floor and the nearbywalls.> Ensure that the floor is level and offers sufficient bearingcapacity to be able to bear the weight of the heat pump,including a hot water tank and, if required, a filled buffertank that is ready for use.> Ensure that cables can be easily run (for brine, wellwater, hot water and heating).b Caution!If an unsuitable heating type is used dur-ing cooling, there is a risk of damageposed by a build-up of condensation.During cooling, condensation forms on theradiators and their supply lines and thiscauses mould to form and structural dam-age.> Do not install the geoTHERM heat pumpswith external passive cooling in heatinginstallations that have radiators.i Take the cooling into consideration when usingsurface collectors.When using a Vaillant heat pump with externalpassive cooling, a ground sensor must be used.4.2 Requirements for the well water quality(VWW only)b Caution!Risk of damage from unsuitable wellwater.Deposits caused by using unsuitable wellwater may damage the suction well, thepipes and the evaporator. Using water thatcontains salt is not permitted.> Before installing the unit, check that thequality level of the water that is drawn inis sufficient.If the heat pump must be installed directly in the well watercircuit, irrespective of the legal requirements, a water anal-ysis must be carried out in accordance with the followingtable for evaluating the quality of the well water(¬ Tab. 4.2) and you must decide whether the well watercan be used as a heat source. The table is to be used as aguide and does not claim to be complete. If the well water isnot of a sufficient quality, you must use a brine-water heatpump (VWS) that has an intermediate heat exchanger thatmust be installed on-site (¬ geoTHERM planning informa-tion).As limit values, the values for “copper” prevail because theheat pump contains a copper-soldered stainless steel plate-type heat exchanger. If the property “¯” (unsuitable)appears in the “Copper” column or if the property “à”appears three times, direct operation is not permitted. Inthis case, an intermediate circuit (with brine-water heatpump and intermediate heat exchanger) must be installed.If a screwed stainless steel heat exchanger (material 1.4401)is used as an intermediate circuit, the limit values for“Stainless Steel” in the table apply. If the property “¯”