F-r. Software version / language selection
- The version and revised date of the µC3 software is dis-
played.
- The language to be used can be selected with keys Up,
Down and Enter: English or Italian.
Temperature setting
Two different modes are available (Control Menu):
1. Setting by means of the water temperature at the ex-
changer intake (probe B5).
This mode carries out a proportional type setting based on a
set point and a proportional band divided into 4 stages. This
type of control is included in the controller by default.
It is also possible to carry out a proportional and integral
setting. In this case, this function must be enabled and an
integration set point established (Control Menu).
Control sensor: B5 (entering water temperature of the ex-
changer).
Parameters to be used:
- Set point.
- Proportional band for intake setting.
- Type of setting (proportional or proportional + integral).
- Integration time set point (if the proportional + integral set-
ting has been enabled).
Control outputs: N1, N6 and N7 (compressor contactors).
Description of operation:
Temperature setting depends upon the average value de-
tected by the probe located at the exchange water intake. It
follows a proportional logic in which the proportional band is
subdivided into four equal stages that give way to compressor
ON/OFF cycles. In proportional + integral mode, operation is
similar, but affected by an algorithm that takes the time period
into account (integration time set point parameter).
STPM Set point
RBM Control band
EIWT Temperature at interchanger intake
C1, 2, 3, 4 Stages/compressors
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