S&P CADB-HE ECOWATT Series Manual page 59

Enter the parameters depending on the required use.
Some of the parameters confi gured in the frequency converter must be re-programmed:
- Press ENTER and rotate the wheel until "FUn-" appears on the screen.
- Press ENTER and rotate the wheel until "PI-" appears on the screen.
- Press ENTER and rotate the wheel until "rPI" appears on the screen.
- Press ENTER and rotate the wheel until the necessary value appears for the "Pressure to be
maintained" parameter. Percentage out of selected range in pressure sensor".
Required pressure at
measurement point "P"
(Pa)
10
20
30
40
60
80
100
120
180
200
300
350
400
- Press ENTER to confi rm the value entered.
- Press ESC repeatedly until you reach the main menu.
- Keep ESC pressed down for 2 seconds until the 3 mode leds light up in sequence. It is now in
RUN mode, available for automatic inverter operation.
Step 3. Reconfi gure range in sensor
Select the TPD-D sensor pressure range in accordance with the values in the third column in
the table above.
6.4.2.4.4. COP Control (Constant pressure)
Constant Pressure (COP)
The inverter is used in multiroom ventilation systems to guarantee a constant air pressure value
in the duct system, regardless of whether the dampers are open or closed.
In both cases, the pressure must be constant in the duct system. The value of this pressure must
be determined by experimenting during the system start-up process.
Value entered
"rPI"
10
20
30
40
60
80
33
40
60
66
60
70
80
59
Pressure sensor
pressure range
(Pa)
0-100
0-100
0-100
0-100
0-100
0-100
0-300
0-300
0-300
0-300
0-500
0-500
0-500