13Operating Manual geoTHERM VWS 0020045200_005.2 Setting menus and parameterssetting to date modified settingHoliday programming 6for cpl. SystemPeriod of time1 >06.01.08 08.01.082 14.01.08 30.01.08Room Temp. setpoint 12°C>Set start daySelect menu:• Turn the dial: Selectmenu e.g. from menu6 to 7.Basic data 7Date >21.04.08Day of week MoTime 09:35>Set dayBasic data 7Date >21.04.08Day of week MoTime 09:35>Set daySelect parameter:• Turn the dial: select theparameter to be modifiede.g. from line 1 day to line2 weekday (in this exam-ple continue to turn3 snap-in points).Basic data 7Date 21.04.08Day of week >MonTime 09:35>Set weekdayBasic data 7Date 21.04.08Day of week >MonTime 09:35>Set weekdayModify parameter weekdayfrom Monday to Tuesday:• Push the dial:Select parameter:• Turn the dial:Modify parameter,• Push the dial:Accept modification.Basic data 7Date 21.04.08Day of week >TuesTime 09:35>Set weekday5.3 Description of the controllerThe heating engineer will have set all the operating pa-rameters to preset values during commissioning, so thatthe heat pump can function optimally. However, you canindividually set and adapt the operating modes andfunctions afterwards.5.3.1 Possible system circuitsThe controller can control the following system circuits:– a heating circuit,– an indirectly heated hot water storage tank,– a hot water circulation pump,– a buffer circuit.In order to extend the system a buffer circuit can beused to connect up to six additional mixer circuit mod-ules VR 60 (accessories) each with two mixer circuits.The controller on the operating panel of the heat pumpis used to programme the mixer circuits.In order to operate under comfortable conditions youcan connect the remote control units VR 90 for the firsteight heating circuits.Operation 5