4. COMMISSIONING
24
If you want to lower the air volume to 4000 m
3
/h you have to change parameter 215 (air
volume min set point) in the frequency converter. The calculation for the value is done with
the following formula:
Where Par205 is parameter 205 (Max pressure transducer setting, see 4.3.3) and k the
nozzle coefficient.
You now have to give in 16.5 for parameter 215 to set the low air volume to 4000 m
3
/h. If
you want to change the high air volume setting of the unit, you have to reset parameter 216
(air volume max set point). The calculation for this value is done accordingly to the low
volume calculation.
4.3.3 Pressure transducer
The pressure transducers for the supply and exhaust fan are installed in a separate box
below the electrical connection box for the fan motors. The transducer factory settings
should normally not be changed.
After installing the unit and before the first start, it is recommended to zero-set the trans-
ducer. After the power supply is established (green LED on) press the zero-set button (1)
and the yellow LED will flash for 3 seconds. After this the pressure transducer is reset.
There are two LED lamps on the printed circuit board, which are indicating the following:
If the yellow LED is ON when the fans are stopped, please check if the tubes to the fans are
bended or pressed. The yellow LED must be OFF when the fans are stopped to have the
pressure transducer work properly!
LED On
Flashing
Off
Green
OK
Pressure outside set range
No power supply
Yellow >50Pa
Zero
setting
in
progress
<50Pa
100
*
)
205
/
)
/
((
2
Par
k
V
Value
=
%
5
.
16
100
*
)
2500
/
)
197
/
4000
((
2
=
=
Value
Summary of Contents for DanX 2/4 XKS
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