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Room air control selection:
Jumper 8
Jumper 8 bridged.
Jumper 9
Switch-off function,
Jumper 9 bridged:
Switch-off function blocked.
The ventilation unit can no
longer be switched off at the
room air control.
Jumper 10
Factory setting
Jumper 10 open.
Alternative
Jumper 10 bridged,
CO
-, VOC- or RFS-
2
sensor activated.
Without a sensor, jumper 10
must be open.
9.6.4 Frost protection temperatures
An internal frost protection monitoring
prevents the heat exchanger from freezing up
at low external temperatures. A temperature
sensor monitors the temperature at the heat
exchanger permanently.
If the outgoing air temperature drops below
the predefined frost protection switch-off
value T-Off, the supply air fan switches off
until the temperature has risen to the defined
frost protection switch-on value T-On.
We recommend the deployment of
i i
an electrical outside air preheating
register, in order to ensure the frost-
protection function in passive-energy
houses. This avoids cycling the
outside air fan.
On/off switching points, adjustable
with jumpers 4 and 5
J4
J5
0
0
0
1
1
0
1
1
0 = Jumper open
1 = Jumper bridged
T-On
T-Off
0 °C
3 °C
2 °C
5 °C
4 °C
7 °C
6 °C
9 °C
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