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3.4 Start menu

3.4.1 Fireplace switch function

The fireplace switch function decreases the extract air
fan speed and increases the supply air fan speed for
approx� 10 minutes� This produces excess pressure in
the home and in this way "creates" an updraught in the
chimney, which prevents smoke from entering the room
when you light the log-fire�

An unnecessary or longterm use of the fireplace switch
function in the wintertime may easily activate the frost
protection function during an unnecessarily long time,
which creates negative pressure in the house and smoke
can be drawn into the house via the chimney� You can
cancel the fireplace switch function by pressing the
fireplace switch function button once again within 10
minutes after you pressed it the first time�

N.B.! The ventilation unit is no source for neces-
sary replacement air while a fire is burning in the
fireplace.

The function is shown in the display only if the value is
On in Menu 3.5.8.

3.4.2 Fan speed

Select the appropriate fan speed� Timer-controlled
airflow boost is available� The operating mode can be
manually changed, even when the fan speed is con-
trolled by the weekly timer�

3.5 Main menu

You can enter settings that affect the operation and
functions of the ventilation unit from the menu�

N.B.! A number of functions are available in the
Main menu as well as in the Installation and Ser-
vice submenu.

From the Montage and service menu, you select wheth-
er the function should be used and certain settings�

The function must be activated from the main menu�

3.5.1 Language

Select the appropriate language�

3.5.2 Installation and service

See Section 3�6, Installation and service�

3.5.3 Clock

Select date and time of day�

3.5.4 Summer night cooling.

This function utilises the cool night air to cool down the
home� The rotary heat exchanger stops�

Conditions for start:

• The reheating function is not active�
• The extract air temperature is above 22 °C� The

outdoor temperature is above 16 °C, but at least 1
°C lower than the extract air temperature� It is pos-
sible to change the temperature limits and select fan
speeds�

3.5.5 Temperature

Set the desired supply air temperature (factory setting:
17 °C)� The ventilation unit’s heat exchanger and an air
heater, if included, are automatically activated so that
the desired temperature will be reached� The supply air
temperature should be lower than the room temperature,
so that the supply air will thoroughly mix with the room
air� Note that a high temperature setting will increase the
ventilation unit’s consumption of electric power�

3.5.6 Basic display

Basic display 1 is selected when the fan speeds in the
Away/Home/Boost steps are to be changed�

Basic display 2 is selected when the fan speeds are to be
changed in five different steps�

3.5.7 To switch off the unit

The ventilation unit fans, the heat exchanger and an air
heater, if fitted, are stopped� The circuit card is how-
ever still energised and the settings are preserved in the
memory�

3.5.8 Fireplace switch function

Select ON as the value for this function, if you wish to
use the function from the control panel display, other-
wise select Off� See also 3�4�1 above�

3.5.9 Weekly timer

Four different programs can be selected on the weekly

3.4 Start menu

3.4.1

Fireplace switch

function

3.4.2 Fan speed

•  Away
•  Home
•  Boost

Menu structure

3.6 Installation

and service

See next page!