ZENN
iO
AVANCE Y TECNOLOGÍA
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ANNEX II. GRILLE CONTROL
Zone switch-on / switch-off
Figure 5.1. “Zone ON” & “Zone OFF” state diagram.
While the zone is in the ON state, the thermostatic control and the grille control stay active, so the
setpoint temperature of the zone is taken into account by the device in order to calculate the general
setpoint temperature of the air conditioning unit, and then it periodically sends, as required, the
pertinent Open or Close orders to the zone grille depending on the setpoint and the reference
temperatures of that zone
1
.
During this process, every time the user changes the zone setpoint, as well as whenever the
working mode is changed, all the variables are reset and the calculation is resumed according to the
new mode and the new setpoint. If, on the contrary, a zone switch-off order arrives, IRSC-Zone will
close the corresponding grille and will stop considering the setpoint of that zone for the calculation
of the A/C unit general setpoint.
While the zone is OFF, every mode change order and every setpoint change order will be ignored.
Only once the zone is switched on again, IRSC-Zone will resume the corresponding calculation and
will send the order to open the grille back, if such order is considered to be required.
Thermostatic control for cooling
The thermostatic control for cooling, whose parameterization determines how IRSC-Zone does its
calculation while the zone is ON and the selected working mode is Auto, Cool, Fan or Dry, permits
two algorithms for controlling the temperature (as the thermostatic control for heating also does):
2-
Point Hysteresis control
and
PI (PWM modulation)
.
1
As explained in section 3.6, if no thermostatic control has been enabled, the grilles will stay open as long as the zone is
ON, and closed as long as it is OFF.
Zone
ON
Zone
OFF
Orden to switch off / Grille is closed
Order to switch on / Reset of variables
Mode switch /
Reset of variables
Setpoint change /
Reset of variables
