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 0020046310_014.6 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 technical personnel incompliance 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 and protect against freezing,thermal insulation must be installed on all supply lines.The lines must be dirt free - so flush these through tho-roughly before filling, if necessary.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 predominantly equip-ped with thermostatically or electrically controlled val-ves, it is necessary to ensure a constant, adequate flowthrough the heat pump. Regardless of the choice of hea-ting system, the nominal flow rate of heating watermust be ensured. This is guaranteed by using a professi-onally installed buffer cylinder.4.7 Scope of delivery3216547812 913141011Fig. 4.4 Checking the supplied materialFor key, see Table 4.2.The heat pump is delivered on a pallet in two packingunits.• Check the heat pump and the separately packagedoperating console for any transport damage.Assembly and installation 4