Vaillant geoTHERM VWS Installation Instructions Manual

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Vaillant geoTHERM VWS Installation Instructions Manual Manual pdf 15 page image

15Installation instructions geoTHERM VWS/VWW 0020051574_01160470Fig. 4.4 Ideal installation dimensions of flexible hoses• The installation site and pipe installation planningfor the geoTHERM heat pump should ensure that theflexible connection hoses supplied for the purposes ofvibration isolation can be connected as shown inFig. 4.4.4.6 Requirements of the heating circuitThe heat pump is only suitable for connection to aclosed central heating installation. To ensure trouble-free operation, the central heating installation musthave been installed by authorised specialists in compli-ance with the applicable regulations.A heat pump is suited to low temperature heating sys-tems. The system must therefore be designed for lowflow temperatures (ideally around 30 to 35 °C). Further-more, it must be ensured that power company outagesare bridged over.EN 12828 requires the following the heating system in-stallation:- a filling valve, in order to fill the heating system withwater or be able to drain the water,- a diaphragm expansion vessel in the return line of theheating circuit,- an overpressure safety valve (opening pressure 3 bar)with pressure gauge (safety group) in the flow line ofthe heating circuit, immediately after the appliance,- an air/dirt separator in the return line of the heatingcircuit.To avoid energy losses in accordance with the EnergySaving Order (EnEV) and to protect against freezing, allconnection lines must be provided with thermal insula-tion.The pipes must be dirt free - if necessary, flush themthoroughly before filling.a Caution!Risk of damage!Do not add any antifreeze or corrosionprotection agents to the heating water,as seals and other components can bedamaged as a result and this can lead towater leaks.In hydraulic installations that are predominantlyequipped with thermostatically or electrically controlledvalves, it is necessary to ensure a constant, adequateflow through the heat pump. Regardless of the choice ofheating system, the nominal flow rate of heating watermust be ensured. This is guaranteed by professionallyinstalled buffer cylinder.Assembly and installation 4