Technical information

100
F-r. Software version/language selection
- Read out of the µC3 software version and update date.
- The "Up", "Down" and "Enter" keys select the language:
English or Italian.
Temperature control
Two different modes ("Menu Control"):
1. Adjustment by water temperature at the heat exchanger
intake (probe B5).
This control carries out a proportional type adjustment
based on a set point and a proportional band distributed
over 4 stages. This is the controller default type.
It is also possible to carry out a proportional and integral
adjustment. In this case, said function must be enabled
and the integration time set ("Control Menu").
Control sensor: B5 (intake water temperature to heat ex-
changer)
Parameters to be used:
- Set point.
- Proportional band for intake adjustment.
- Type of adjustment (Proportional or Proportional + Inte-
gral)
- Integration time (if the Proportional + Integral adjustment
has been enabled).
Control outputs: N1, N2, N6 and N7 (compressor contac-
tors),
Description of operation:
Temperature control depends upon the value measured by
the probe located at the water intake to the heat exchanger.
It follows a proportional logic in which the proportional band
is subdivided into four equal stages that give way to on/off
functions of the compressors. In Proportional + Integral op-
eration behaviour is similar, but affected by al algorithm that
takes time into account (integration time parameter).
STPM Set point
RBM Control band
EIWT Intake water temperature to heat exchanger
C1, 2, 3, 4 Stages/compressors
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