Engineering manual - UniSAB III 1.10.8
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001930 en 2021.06
Set-up
For reciprocating compressors it will still be possible to configure Water cooling. See subsection 6.4.5
Oil system, 5: Water cooling.
When choosing LP, HP or DX it is not possible to configure 17: By-pass start to Yes.
22: Ext PT100
Yes
No
Select Yes if the superheat calculation used in the DX regulation is based on a suction temperature
measurement from an external 4-20 mA PT100 transmitter.
This transmitter must be scaled -50°C to +-50°C, 4 to 20 mA.
Select No if the superheat calculation used in the DX regulation is based on the standard Suction tem-
perature PT100 sensor.
23: Flow factor
0 to 10,000 m
3
/hour
Adjust the flow factor according to the installed flow measuring device. Only valid if COP active = Yes.
See the UniSAB III COP manual for further information.
24: Liquid subcool
0 to 99.9°C
Enter a value for the compressor Liq.subcool using the formula ΔT~Tc,sat-T3. Only valid if COP active =
Yes. See the UniSAB III COP manual for further information.
25: PMS feedback fixed
No
Yes
Select No if you want the PMS feedback input to be set up as a pulse feedback signal. In this case the
signal can be removed during operation without stopping the compressor.
Select Yes if you want the PMS feedback input to set up as a fixed feedback signal. This may be used
for e.g. pump control function. In this case the signal cannot be removed during operation without stop-
ping the compressor. If the PMS feedback gets off (after having been ON) a PMS error shutdown is
given.
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