3.
As well as enabling the function on screen Cca01
parallel compression is activated based on the percentage of opening of the RPRV valve and the gas cooler
outlet temperature. In particular:
•
the gas cooler outlet temperature must be higher than a threshold;
•
the percentage of opening of the RPRV valve must be higher than a threshold for a set time
Screen Cca02 is used to set the thresholds described above:
Parallel compression is deactivated, and the standard RPRV valve set point restored, when at least one of the
following conditions occurs:
•
the pRack is switched OFF (from the screen, supervisor or digital input);
•
the gas cooler outlet temperature falls below the T
•
the parallel compression control percentage is zero.
NOTE: the high pressure prevention function and high pressure alarms managed by the main board will only
act on the compressors on line 1 (medium temperature); the parallel compression function will not stop, nor
will the capacity be decreased.
CONDITIONS FOR ACTIVATION
OFF threshold;
GC
7
ENG
+030220585 - 1.1 - 10.12.2015