6.6
Night purge
During the times-of-non-use, the night air can be used to cool the rooms under certain condi-
tions: the fan operation (speed 1) is enabled and, if necessary, the mixed air chamber is re-
versed to 100 % outdoor air rate. The night purge is only enabled when the
summer deacti-
vation
function (–> section 6.10.2) is active and, in addition, the following conditions are
met:
4
Room temperature is greater than the room temperature limit
Enable night purge (START)
and
4
Temperature difference between room temperature and the outdoor temperature is
greater than the value set under
Temperature difference to outdoor temperature
The night purge can be set to start at 0:00 hrs at the earliest, 4:00 hrs at the latest –
depending on the programmed system times-of-use. The controller must be programmed to
start the night purge at the latest possible point in time. It is limited to two hours at the maxi-
mum. If the room temperature falls below the room temperature limit value determined under
Finish night purge (STOP), the night purge is ended early.
Functions
WE
Configuration
Night purge
OFF
24 °C
18 °C
5 °C
Fb10 = ON
START / STOP up to 50 °C
STOP / 10 °C up to START
Temperature difference to outdoor temp. / 0 to 50 °C
56
EB 5477 EN
Control functions
30
26
22
25
32
Fig. 21 · Summer compensation
Outdoor
temperature °C
Set point °C