Symbol Description Explanation/Actions
dimming
until the dimming is activated after the TFT control panel was last
used
Degree of dimming
in relation to the basic brightness of the active screen
Button
Light bulb
With this button the set dimming can be tested. The screen is
dimmed for 5 seconds according to the setting.
Table 12: Automatic sensor parametrisation
4.3.2.8 Sub-menu Key lock
The user interface of the TFT control panel can be deactivated by a password-protected key lock.
Symbol Description Explanation/Actions
Enter the password <11111> and confirm with Enter. The current
status “key lock” will be displayed on the touch pad.
Deactivate key lock
After touching the button, the password is requested to deactivate
the key lock.
Enter the password <11111> and confirm with Enter.
Table 13: Activating /deactivating the key lock
4.3.2.9 Sub-menu Summer ventilation without bypass
The summer ventilation without bypass serves free cooling in ventilation systems without bypass shutter. When it is
activated, the exhaust air fan is switched off and thus heat transfer from the extract air to the supply air prevented. To
check the plausibility of the temperature conditions, the exhaust air fan is switched on additionally for 2 minute per
hour to the currently active fan speed.
This menu indicates whether summer ventilation without bypass is possible. The operating mode summer ventilation
without bypass can be released or not. The release of the summer ventilation function is selected with the navigation
buttons (red text background) and setting a check mark and confirmed via Enter. In addition, the temperature limit for
the summer ventilation function can be selected with the navigation buttons (red text background) and adjusted with
the +/- buttons. If the boost ventilation mode is activated during the active phase, the summer ventilation is
interrupted for the duration of the boost ventilation.
Abbreviation Description Explanation/Actions
t_som Temperature limit
summer ventilation
Temperature limit setting range: 20 °C…30 °C
The summer ventilation is active when the extract air exceeds the set
temperature limit and the outdoor air at the location of the unit is lower
than the extract air at the location of the unit.
In addition, the outdoor air at the location of the unit must be higher
than the set limit for the outdoor air.
Table 14: Temperature limit summer ventilation without bypass parametrisation
To prevents draughts due to supply air temperature that is too cold, summer ventilation remains
inactive below an outdoor air limit temperature. The limit value of the minimum outdoor air
temperature can be adjusted in the main menu Setup between 12 °C ... 20 °C (factory setting: 13 °C).
4.3.2.10 Sub-menu Supply heater
In this menu, a potentially existing supply heat module (electric heating register or hot water heating register) is
displayed. The supply heater function can be activated or deactivated. The release of the supply heater function is
selected with the navigation buttons (red text background) and setting a check mark and confirmed via Enter.
4.3.2.11 Sub-menu Ground heat exchanger shutter
In this menu, a potentially used GHE shutter (ground heat exchanger shutter) is shown. The GHE shutter function
can be activated or deactivated. The release of the GHE shutter is selected with the navigation buttons (red text
background) and setting a check mark and confirmed via Enter. In addition, the temperature limits for switching the
GHE shutter can be selected with the navigation buttons (red background) and adjusted with the +/- buttons.
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