Operating instructions
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2.1.4 Fans
The novus includes two maintenance-free 230 VAC radial fans with the integrated power supply unit and
electronic commutation. The volume flow constant fans keep the air quantity at a constant speed for
each selected fan rotary speed. The air quantity is also not affected by soiled filters.
2.1.5 Filters
2 filters in Z design of the filter class G4 are installed in the device. They consist of a synthetic filter mat
in a polypropylene frame. A pollen filter of the filter class F7 can be used as intake air filter.
2.1.6 Frost Protection
The novus is equipped with automatic frost protection which prevents that the heat exchanger freezes at
very low outside air temperatures. The fans will be temporarily deactivated if the intake air temperature or
the supply air temperature of the device falls below the threshold value.
2.1.7 Summer and Winter Bypass
The novus has a sensor-regulated motor-driven bypass flap. The summer and winter bypass is an
additional circulation duct, which (temporarily) prevents the heat transmission between the exhaust and
supply air. The bypass works automatically.
2.1.8 Common Operation with fireplaces
The installer has to comply with the corresponding standards and regulations in case of synchronous
operation with fireplaces, e.g. fireplace. The common operation of heat-producing appliances and
ventilation systems dependent on the indoor air requires a suitable safety device (differential pressure
switch) or a plant-specific device, when a dangerous negative pressure builds up in the installation room
of the heat-producing appliance during the operation. The focus is prepared for the common operation
with fireplaces.
2.2 Available Control Units
The novus can be equipped with the following control units:
• LED control panel
• TFT Touchpanel
• Boost ventilation switch
2.2.1 LED Control Panel
Key - supply air and extract air mode
Key – only extract air mode
Key – only supply air mode
Key – fan speed down
Key - fan speed up
Key - boost ventilation
Reset key – filter change period
Figure 2: Key assignment for LED control panel