Vaillant geoTHERM VWS Operating Manual

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

Vaillant geoTHERM VWS Operating Manual Manual pdf 15 page image

13Operating Manual geoTHERM VWS/VWW 0020051578_015.3.2 Energy balance controllerThe energy balance controller is only applicable to hy-draulics without buffer cylinder.For economical and fault-free operation of a heat pump,it is important to regiment the starting of the compres-sor. The start-up of the compressor is the point at whichthe highest loading occurs. With the help of the energybalance controller it is possible to minimise starts of theheat pump without compromising the comfort of apleasant room atmosphere.As with other weather-controlled heating controllers thecontroller determines a supply set target temperatureby capturing the outside temperature through a heatingcurve. The energy balance calculation is carried outbased on this supply set target temperature and thesupply real temperature the difference of which ismeasured per minute and added up:1 degree minute [°min] = 1 K temperature difference inthe supply from 1 Minute (K = Kelvin)The heat pump starts up at a defined heat deficit andonly switches off again when the supplied heat is equalto the heat deficit.The larger the preset negative numerical value is, thelonger the periods for which the compressor is keptrunning or at standstill.5.3.3 Charging principle buffer cylinderThe buffer cylinder is controlled depending on the set-point flow temperature. The heat pump heats when thetemperature of the buffer cylinder head temperaturesensor VF1 is smaller than the set target temperature. Itheats until the temperature measured by the sensor atthe base of the buffer cylinder, RF1, has reached the set-point temperature plus 2 K.In the connection to a hot water cylinder charging thebuffer cylinder is also charged when the temperature ofthe head temperature sensor VF1 is less than 2 K higherthan the set target temperature (premature reheating):VF1 < T VL set + 2 K.5.3.4 Resetting to factory settingsa Caution!Inadvertent deletion of specific settings!When you reset the control system tothe default settings, specific systemsettings can be deleted and the systemcan shut down. The system does notsuffer damage.• Press both dials simultaneously for at least 5 secondsin the top-level display of the graphics display.After that you can select whether to reset only thetimer programme or all values to the default settings.5.3.4 Controller structureThe top level display is a graphics display. It is thestarting point for all the available displays. This displayreappears automatically if you do not actuate any of thedials for a long time when setting values.Controller operation is subdivided into four levels:The operator level is specified for the operator.In Sect. 5.4 all of the controller's displays are shown asa flow diagram. A detailed description of the displays iscontained in Sect. 5.5.The code level (menu C1 - C9, D1 - D5, I1 - I5 and A1 - A9)is reserved for the engineer and protected by a code toprotect it from unintentional modification.As the operator you can scroll through the menus of thecode level and view the system-specific setting parame-ters however without changing the values.In the menus C1 to C9 the engineer sets system-specificparameters.The menus D1 to D5 enable the engineer to operate andtest the heat pump in the diagnosis mode.In Menus I1 to I5 you can obtain general information re-garding the settings for the heat pump.Menus A1 to A9 take the engineer through the installa-tion menu to put the heat pump into operation.The display and selection of special function(e.g. the energy-saving function) is also possible for theoperator. Instructions on how to activate the specialfunctions are given in Chap. 5.6.The fourth level contains functions for the optimisationof the system and can only be set by the engineer usingvrDIALOG 810/2.5.3.5 Adjusting the energy saving functionsAlso described in Chap. 5.5 are heat pump settings thatwill enable a reduction in your energy costs. This can beachieved by finding the optimum setting of the heatpump's weather-controlled energy balance controller.This symbol points you to these energy saving tips.Operation 5GB