FRÄNKISCHE profi-air 250/360 flex, Installation And Operating Instructions Manual

Page: 52 / 108

Step Procedure
6b
Determine the pressure loss at the heat exchanger on the basis of the air volume
to be set in ventilation mode 3.
To do so, press the “NEXT” button until the
“Nominal volume / Pressure loss” setting regulators are displayed with a green
border.
The required pressure loss can be obtained from the software after setting the
nominal flow rate.
Example:
Nominal volume: 144 m³/h
Pressure loss: 33 Pa
7a
Adjust the required extract air volume.
To do so, adjust the performance of the extract air fan using the integrated con-
trol panel until the measured pressure loss equals the established pressure loss.
Press and hold the “Error message” button and press the “Weekly programme /
Automatic mode” button to increase the air volume gradually.
Press and hold the “Error message” button and press the “Manual ventilation
mode” button to decrease the air volume gradually.
Pressing the button generates a short acoustic signal. A long acoustic signal
indicates that the upper or lower end of the setting option has been reached.
Note:
After adjusting the fan speed, wait for approx. two minutes until the fan opera-
tion becomes stable again.
Increase extract air volume
Decrease extract air volume
7b
Adjust the required extract air volume.
To do so, press the “NEXT” button until the “Nominal speed” setting regulator
is displayed with a green frame.
To set the extract air volume, adjust the setting regulator until the determined
pressure loss equals the measured pressure loss.
Note:
After adjusting the fan speed, wait for approx. two minutes until the fan opera-
tion becomes stable again.
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Installation and operating instructions profi-air 250/360 flex
52