Temporary operating modes (override)
Bypass mode
(cooling)
Automatic bypass
function
Manual bypass
function
10
With the exception of the automatic bypass function, the temporary operating modes are
activated manually and temporarily override the settings of the selected main mode. The
temporary operating modes are stopped automatically by a timer or if certain conditions are
not met, but can also be deactivated manually (with the exception of the automatic bypass
function).
In bypass mode, the bypass damper is opened, which will guide the airflow around the heat
exchanger. The outside air is thus guided into the dwelling without heat recovery. The bypass
mode can be activated in two ways:
• Automatic bypass function
• Manual bypass function
When using the automatic bypass function, the bypass damper is automatically opened/
closed when the conditions for automatic bypass are met.
You can change the setpoints for the minimum outdoor temperature (Tmin, default setting:
15 °C) and max. indoor temperature (Tmax, default setting: 24 °C) via the PC tool or the
Dantherm HRC3 remote control.
If the conditions for automatic bypass are met, the open status of the damper is indicated by
the continuous illumination of the corresponding LED.
Conditions for activating the automatic bypass function:
• The outdoor temperature is at least 2 °C below the extract air temperature
• AND the outdoor temperature is above the setpoint (Tmin)
• AND the extract air temperature is above the setpoint (Tmax).
If one of the following conditions is met, the bypass is deactivated:
• The outdoor temperature is above the extract air temperature.
• The outdoor temperature is at least 2 °C below the setpoint (Tmin).
• The extract air temperature is at least 1 °C below the setpoint (Tmax).
NOTICE
Waste of energy!
If the settings for the bypass temperature are too low, there is a risk that the unit will open the
bypass while the central heating inside the dwelling is active.
If bypass/cooling is desired and the automatic bypass function is not activated, the bypass can
be activated manually.
The bypass is opened once the conditions for manual bypass are met within the set time
period (default setting: six hours). The time period can be changed by means of the PC tool.
Briefly pressing the bypass button activates/deactivates the manual bypass mode.
An active bypass mode (open damper) is indicated by the continuous illumination of the
corresponding LED.
Note: If the bypass mode is activated but the conditions for the open bypass damper are not
met, the activated bypass mode is not indicated by the LED.
Conditions that must be met to activate the automatic bypass function:
• The outdoor temperature is at least 2 °C below the extract air temperature
• AND the outdoor temperature is above 9 °C
Operation: Temporary operating modes (override)
USER MANUAL