Installation instructions geoTHERM VWS/VWW 0020051574_0110Additionally, there are further settable auxiliary func-tions available (see also Chap. 8.3 "Settable auxiliaryfunctions"):- Timer programmesTo set the heating times for each heating circuit- Holiday programmingProgramming of two holiday periods with date entryand set-back temperature- Party functionCarries the heating and hot water times forward tothe next shut-off point- Energy saving functionLowers the flow setpoint temperature for a presetta-ble period- Cooling modeThe cooling mode allows you to use the heat pump forcooling.A number of components for the passive cooling oper-ation must be installed on the customer side. For in-formation and selection of components, refer to theplanning information for the electric heat pump sup-plied by Vaillant.- Screed floor dryingFor drying out screed floors- Fixed value controllingFor setting a fixed flow temperature- Anti-Legionella functionKills germs in the cylinder and in the pipes- Fast testTesting function for maintenance- Remote maintenanceDiagnostics and setting via vrDIALOG or vrnetDIALOG3 Safety instructions and regulations3.1 Safety instructionsThe heat pump must be installed by an approved techni-cian, who will be responsible for adhering to the existingstandards and regulations. We accept no liability for anydamage caused by failure to observe these instructions.Find out the transport and operating weights of the heatpump from the Technical Data and take heed of themduring transportation and installation. Pay particular at-tention to Chap. 4.2, "Requirements of the installationsite", before assembly.d Danger!The coolant circuit is pressurised. Fur-thermore, high temperatures can arise.The appliance may only be opened andserviced by Vaillant factory customerservice or by a qualified specialist tech-nician. Work on the coolant circuit mayonly be carried out by a qualified refrig-eration engineer.e Danger!Risk of electric shock!Always switch off all power supplies be-fore carrying out any electrical installa-tion or servicing work. Make sure thatthey are secured against inadvertentswitching on again.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.If the heating water hardness is above 3,0 mmol/l(21,05 °e) it should be softened. You can use theVaillant ion exchanger (Art. No. 990 349) for this. Ob-serve the enclosed instructions for use.a Caution! For VWW only:Risk of damage to the heat pump.The incoming ground water must bechecked for quality to ensure that nodamage occurs to the suction well, pipesor evaporator.2 Description of the appliance3 Safety instructions and regulations