EVCO c-pro nano HPR0 - Manual (Page 22)

C-PRO NANO HPR0 APPLICATION MANUAL
Page 22
5.3 Regulation and management of the compressors
The controller can manage up to a maximum of 2 compressors. Digital outputs for switch-on/off
and protection inputs (pressure switches) are associated with every compressor. Switch-on/off is
defined depending on the set/outlet temperature, some timing and request of the room thermostat
and the indoor thermostat.
The compressor switch-on control takes place on the basis of the outlet temperature AI1.
The following figure shows the behaviour of the regulation in the case of summer functioning
(chiller). The regulation requests compressor switch-on on the basis of the outlet temperature value.
In this regulation, the band is shifted completely over the setpoint.
However, in winter functioning mode (heat pump), the band is shifted completely below the set-
point:
Compressor ON
Pump ON
SETH SETH -
Outlet temperature
Compressor ON
Pump ON
SETC SETC +
Outlet temperature