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UAB KOMFOVENT we reserve the right to make changes without prior notice
VERSO PRO2_guide_20-07
EN
2.8. Summer night cooling function (SNC)
Summer night cooling function uses the night’s cool air to ventilate the premises during summer. This function removes
excess heat accumulated during the day and fills the building with cooler outdoor air.
Function runs at night (from 00:00 a.m. to 06:00 a.m.) when the outdoor air is cooler than the indoor air and the indoor
temperature is higher than the user-defined limit (i.e. ventilation is required). When this function is activated, the ventilation
intensity is increased to the maximum and the outdoor air is supplied to the premises (all cooling devices are switched off,
heat exchanger is stopped). The user may also set the room temperature at which the function will be stopped.
Summer night cooling function has priority over ACV and AQC functions.
For information on how to activate this function and set ON/OFF temperatures see Chapter “Control and Settings”.
2.9. Override (OVR)
Override function is activated by closing designated contacts in the controller board, i.e. by connecting a switch, cooker
hood or a motion sensor (see “Installation Manual”). This function ignores current ventilation mode and switches to the pre-
selected mode or stops it. In the function setup screen the user can select any ventilation mode, weekly operation schedule
or turning off of the unit. Additionally, the user may also specify conditions when the override function should run:
• All the time – function is activated any time by closing contacts, regardless of whether the unit is operating or stopped.
• When running – function is activated by closing contacts when the unit is operating. When the unit is stopped with a
remote controller or by a weekly schedule, the function cannot be activated by closing contacts.
• When stopped – function is activated by closing contacts when the unit is stopped. If the unit is already running in any
ventilation mode, the function cannot be activated by closing contacts.
This function runs as long as contacts are closed. When the contacts are open, the unit returns to the previous ventilation
mode or stops, if it was stopped before activating the function.
2.10. Filter impurity indication
The air handling unit has separate pressure sensors for measuring differential pressure upstream and downstream the
filters. The initial pressure drop of clean filters is pre-programmed in the factory according to the type of filters used. This
value is used to calculate the pressure value for filter replacement; filter contamination level is displayed as a percentage.
In case filters from another manufacturer or filters of other filtration class are used instead of factory-fitted filters, calibra-
tion of clean filters shall be performed before using the air handling unit.
Filter calibration is described in chapter “Control and Settings”.
For information on how to replace contaminated filters see Chapter “Periodic Maintenance”.
