Wiring Diagram; Cav Control (Constant Airfl Ow) - S&P CADB/T-HE ECOWATT 04 Manual De Instrucciones

Wiring diagram

FREQUENCY
CONVERTER
Supply motor
FREQUENCY
CONVERTER
Supply motor
* Resistance provided inside the electrical board.
6.4.2.4.3. CAV control (Constant airfl ow)
The inverter is used to guarantee an specifi c constant air volume in the duct system, regardless
of the fi lters clogging state.
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 CAV mode, it is necessary to use the accessory CONTROL
AERO-REG and the external pressure sensor TDP-D. In the CONTROL AERO-REG instruction
booklet it is contained the necessary information to carry on the electrical connection of the
different components.
1º Connect the pressure transmitter TDP-D (accessory) to the specifi c pressure taps there are
in the heat recovery unit. Ensure that pressure taps " + " and " - " . Same sign in the taps of
TDP-D and CADB-HE.
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