VTR 100B LITE Installation and Service manual v2

32
|
Operation
8 Operation
8.1 Setting the temperature
The supply air temperature is set manually in steps of 1 K in the main menu display by choosing the temperature
symbol.
If an electrical re-heater is installed the temperature setpoints are:
12-22 °C. For installed water re-heater the setpoints are: 12-40 °C.
If the re-heater is deactivated, the temperature steps are:
15-19 °C. Default value: 15.0 °C.
Each temperature step is illustrated by increasing the filling of the temperature symbol and the temperature is shown in
the display
Temp19 °C
An unfilled temperature symbol will activate manual summer mode. See chapter 8.3
8.2 Manual setting of airflow
It is possible, at any time, to manually set the airflow in the main menu display. By choosing the fan symbol and con-
firming, it is possible to increase or decrease the airflow in 5 steps: Off, Low, Nom, High and Auto.
By doing so, you override the programmed week schedule for the unit until the end of the present time period in the
week program (chapter 5.7).
Airflow
Warning
It is not recommended to activate manual fan stop (set fan to OFF) in standard households.If manual fan
stop is activated, the unit should be provided with dampers in exhaust and fresh air ducts to avoid cold
draught and risk of condensation when the unit has been stopped.
The fan can be set to OFF by activating manual fan stop. See the Installation and Service manual, chapter
Service menu overview: Manual fan stop.
8.3 Manual and automatic summer mode
Manual summer mode occurs if no temperature step is selected. The temperature symbol on the main menu is then
completely empty.
Tempoff
If the electrical re-heater is activated, it will switch off during manual summer mode. Manual summer mode goes auto-
matically to step 1 (setpoint 12 °C) after two minutes if the supply air temperature is +5 °C or below.
If a water heater battery is installed and activated, the manual summer mode goes automatically to step 1 (setpoint 12
°C) if the outdoor air or supply air temperature is +5 °C or below.
The unit will automatically alternate between winter operation with heat recovery and summer operation without heat
recovery.
212962 | v02