S&P CADB-HE ECOWATT Series, Manual

Page: 55 / 72

55
ENGLISH
Automatic proportional control with a 0-10v signal from an external analogue sensor
(CO
2
, temperature or relative humidity)
Features
In this case, the equipment is used to regulate the air volume in accordance with the value
measured by an external sensor.
The external sensor must emit a 0-10V analogue sensor.
With 0-10V input the input voltage values cannot be adjusted.
It is possible to change the behaviour of the proportional output by modifying the value of the
LSP, HSP, CrL3 and CRH3 paramaters.
In this case, some of the parameters confi gured in the frequency converter must be re-pro-
grammed in the inverter to avoid exceeding the overpressure value established by the relevant
regulations. Access the programming mode (steps 1 and 2 in section 2.2) and then perform the
following confi guration changes:
- Press ENTER and rotate the wheel anti-clockwise until “SEt-” appears on the screen.
- Press ENTER and rotate the wheel anti-clockwise until “LSP” appears on the screen.
- Press ENTER and rotate the wheel until the necessary value appears for the “Minimum fre-
quency in Hz” parameter. Press ENTER to confi rm the value entered. If this value is different
to the previous one, the display should fl ash.
- Press ESC to exit the “LSP” parameter.
- Rotate the wheel until ”HSP” appears on the screen
- Press ENTER and rotate the wheel until the necessary value appears for the “Maximum fre-
quency in Hz” parameter. Press ENTER to confi rm the value entered. If this value is different
to the previous one, the display should fl ash.
- Press ESC to exit the “HSP” parameter.
- Press ESC to exit the “Set-” menu.
- Follow the method used to confi gure the two initial parameters until all of the parameters in
the following table have been confi gured:
Menú Parameter Value Comment
I_O- CrL3 7.2 Minimum reference value (mA)
I_O- CrH3 14.4 Maximum reference value (mA)
Ctl- Fr2 AI3 Current type reference (mA)
Fun- PI- PIF No Disable de PI function
- Press ESC to exit the “CtL-” 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.