S&P CADB-HE ECOWATT Series Manual page 53

Independent control of supply and extract fans
Manual control by the internal potentiometer integrated in the frequency converters located
inside the unit. Valid for CADB/T-HE 40 and 54 models
1. Remove the panel that give access
to the frequency converter.
6.4.2.4.2. VAV Control (variable airfl ow), with CO
CADB/T-HE 04 to 21 models:
In these sizes the units have plug-fans with EC motors 230V supply voltage. The motors have
specifi c terminals for sending a regulation signal to control fan speed (0-10V).
The 0V signal corresponds to the fan stop, while the signal of 10V corresponds to fan maximum
speed.
To perform the speed regulation in VAV with speed control with external sensor of CO2 or simi-
lar, it is necessary to use the accessory CONTROL AERO-REG and the external sensor (see point
7.5.2.4.). In the CONTROL AERO-REG instruction booklet it is contained the necessary informa-
tion to carry on the electrical connection of the different components.
Extract fan
2. Modify the fan speed (frequency) by means of
the external potentiometer in the frontal of the
frequency converter.
sensor or similar
2
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Supply fan
external potentiometer