4 Operation
4.1 Description
The appliance is supplied ready for plugging in and works automatically according to the standard settings. The
discharged dirty indoor air warms up the fresh clean outdoor air. That saves energy while fresh air is supplied to
the desired rooms.
The control system has four ventilation modes. The air flow rate can be adjusted for each ventilation mode. The
constant volume control system ensures that the ventilation balance between the supply and exhaust fan is
realized independent of the duct pressure.
If no external control is connected on to the appliance, then the appropriate ventilation model can be chosen on
the touchscreen display.
For external control a 4-way switch (
®
Connecting extra multiple switch with filter indication
page 40) can, for
example, be chosen, but control is also possible with the Air Control (
®
2
sensor(s) (
®
®
or the App.
4.2 Bypass
The 100% bypass makes it possible to supply outside air, which is not heated up by the heat exchanger.
Particularly during summer nights it is desirable to supply cooler outside air. The warm air in the dwelling is then
replaced as much as possible by cooler outside air.
The bypass valve opens and closes automatically when a number of conditions are met (see table below for
bypass conditions).
Follow step numbers 2.1 to 2.6 in the settings menu in the user interface, (
®
Setting values standard appliance
page 51) in order to adjust the operation of the bypass valve.
Bypass valve preconditions
Bypass
valve open
▪
The outdoor temperature is higher than 10°C (adjustable between 7°C and 15°C at step no. 2.3)
and
▪
the outdoor temperature is lower than the indoor temperature of the dwelling
and
▪
the temperature from the dwelling is higher than 24°C (adjustable between 15°C and 35°C at step no.
2.2)
Bypass
valve closed
▪
The outdoor temperature is lower than 10°C (adjustable between 7°C and 15°C at step no. 2.3) C
or
▪
the outdoor temperature is higher than the indoor temperature of the dwelling or
▪
the temperature from the dwelling is lower than the set temperature at step no. 2.2 in the settings
menu minus the set temperature at the hysteresis (step no. 2.4).
The appliance features a ‘Bypass boost’ function. This means that when this function is switched on (can be
switched at step 2.5) the ventilation mode with an opened bypass valve goes to maximum air flow rate (adjustable
at step no. 2.6).
Ubiflux Vigor W325 615743-G
Ubbink / 11
