Gattetti LCA User Manual page 17

Water chillers and heat pumps
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/9: Calibration of evaporator outlet water probe at circuit no.2, B4
It allows to add an offset to the value measured by B4.
/A: Calibration of condensation probe circuit no. 2, B5
It allows to add an offset to the value measured by B5.
/b: Digital filter
It allows to calculate the coefficient relative to the digital filter of the measured value. Give this parameter a high value
(recommended 4) so as to eliminate any noise at analog input lines; they however decrease the sensitiveness of the
probe).
/C: Input limitation
This parameter allows to set the max. variation in the value detected by the probes during any cycle of the unit. The
measure variation range is 0.1÷1.5 units (bar, °C or F according to the probe and the measurement scale) about every
second. Giving this parameter low values allows to limit impulsive noise effects. Recommended value: 8.
/d: Measurement scale
It allows to set the operating mode either in degrees Centigrade or Fahrenheit. As the parameter varies, "µchiller"
automatically turns the values into the new measurement scale.
Regulator (parameters "r")
r1: Cooling Set-Point
It allows to set the Cooling set-point value (direct).
r2: Cooling differential
It allows to set the Cooling differential.
Cooling functioning mode – 2 compressor or capacity-controlled compressor
RG66000889-REV.00
Cooling functioning mode – 1 compressor
Summer Set Point
Summer Set Point
Cooling functioning mode width ON/OFF – probe
Open contact
Summer Set Point + differential
Summer Set Point + differential
Compressor
Close contact
17

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