
A6V10733786_en_c 3 | 170
5 Application functionalities ......................................................................... 55
5.1 Application use cases............................................................................... 55
5.2 Controlling of operating modes................................................................. 56
5.3 Operating mode categories ...................................................................... 57
5.3.1 Normal modes ............................................................................ 57
5.3.2 Temporary modes....................................................................... 57
5.3.3 Special modes (At home / Away)................................................ 58
5.3.4 Off mode ..................................................................................... 58
5.4 Operating mode settings .......................................................................... 59
5.5 Fan speed control..................................................................................... 60
5.5.1 Linear fan speed (VntCtl23y, FanSu23y, FanEh23y) ................. 61
5.5.2 Constant air flow regulation (VntCtl21y, FanSu21y, FanEh21y) 64
5.5.3 Constant duct pressure (VntCtl22y, FanSu22y, FanEh22y)....... 69
5.5.4 Fan speed control for temporary modes..................................... 74
5.6 Air quality control (VntCtl11y, 12y, 13y) ................................................... 76
5.6.1 CO2 / carbon dioxide, (AQualCtl21y) ......................................... 76
5.6.2 Fine dust (PmCtl21y) .................................................................. 78
5.7 Fan humidity control (DhuCtl11y) ............................................................. 80
5.8 Air temperature control ............................................................................. 83
5.8.1 Supply air temperature control (TSuCtlH21y)............................. 83
5.8.2 Supply air regulation with outdoor temperature compensation... 86
5.8.3 Extract (room) temperature cascade control (TCasCtlH21y and
TCasCtlC21y) ............................................................................. 88
5.8.4 Fan heating/cooling influence ..................................................... 90
5.9 Energy Recovery ...................................................................................... 91
5.9.1 Rotational Heat Exchanger (RotHExg21y) ................................. 91
5.9.2 Passive Heat Exchanger, controlled (PltHExg21y)..................... 99
5.9.3 Passive Heat Exchanger, uncontrolled (PltHExg22y)................. 107
5.10 Heating ..................................................................................................... 111
5.10.1 Water based heating with frost protection (HclHw21y)............... 111
5.10.2 Electrical heater (HclEl21y) ........................................................ 113
5.11 Cooling ..................................................................................................... 115
5.11.1 Cooling coil chilled water (CclChw21y)....................................... 115
5.11.2 DX based cooling (CclDx21y) ..................................................... 116
5.11.3 Free cooling (FreeCDtr11y) ........................................................ 117
5.12 Outside air dampers (DmpShoffOa11y) ................................................... 118
5.12.1 Recirculating air damper ............................................................. 119
5.13 Filter supervision (FilAMon21y) ................................................................ 121
5.14 Preheating Functions................................................................................ 122
5.14.1 Earth to Air Heat Exchanger (EaHExg21y)................................. 122
5.14.2 Brine Coil (PreHclBne21y) .......................................................... 123
5.14.3 Electric Preheating Coil (PreHclEl21y) ....................................... 124
5.15 External dehumidifier................................................................................ 126
5.16 Fire damper (Fdp11y)............................................................................... 127
5.17 Priority list ................................................................................................. 129
5.18 Start-up / shut-down sequence................................................................. 130
5.19 Safety functions (SftyCtl11y) .................................................................... 132
5.19.1 Duct temperature supervision..................................................... 132
5.19.2 Fire / smoke / emergency off ...................................................... 133
5.20 Time counters........................................................................................... 134
5.21 Alarm functions......................................................................................... 135