Vaillant geoTHERM VWS Operating Manual

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

Vaillant geoTHERM VWS Operating Manual Manual pdf 9 page image

7Operating Manual geoTHERM VWS/VWW 0020051578_01Floor protection circuit for all hydraulics withoutbuffer cylinder (e.g. in hydraulic plans 1 and 3)If the measured flow temperature in the underfloorheating circuit continuously exceeds a specific value formore than 15 minutes, the heat pump switches off andissues the error message 72. When the heating flowtemperature falls below this value again and the errorhas been reset the heat pump switches back on.a Caution!Danger of damage to the floor.Set the value for the floor protectioncircuit ensuring that it is not highenough to damage the floor as a resultof excessively high temperatures.Phase monitoringThe sequence and existence of phases (clockwise rotat-ing field) on the 400 V voltage supply are continuouslymonitored during commissioning and operation. If thesequence is not correct or if a phase breaks down, theheat pump is switched off due to the error to avoiddamage to the compressor.Freezing protection functionThe outlet temperature of the heat source is constantlymeasured. If the heat source outlet temperature fallsbelow a specific value, the compressor temporarilyshuts off with the error message 20 or 21. If these er-rors occur three times in a row there is a fault-inducedshutdown.For the geoTHERM VWS heat pumps you can set thevalue (Default setting -10 °C) for the freezing protectionin the installation assistant A4.For the geoTHERM VWW heat pumps a default value of+4 °C is set. This value cannot be changed.3.4 Design of the heat pumpThe types of heat pump available are listed below. Theheat pumps are, above all, different from each other intheir output.Type name Heating output (kW)Brine-to-water heat pumps (B0/W35) 1)VWS 220/2 21.6VWS 300/2 29.9VWS 380/2 38.3VWS 460/2 45.9Water-water heat pumps (W10/W35) 2)VWW 220/2 29.9VWW 300/2 41.6VWW 380/2 52.6VWW 460/2 63.6Table 3.1 Type summary1) Thermal heating output with a brine temperature of 0 °C andheating flow temperature of 35 °C2) Thermal heating output with a water temperature of 10 °C andheating flow temperature of 35 °C213Fig. 3.3 Front view VWS/VWWKey to Fig. 3.31 Label with heat pump type designation2 Operating panel3 Serial numberEquipment and functional description 3GB