Refrigerant Charge; Operating Cycle - Rivacold CO2NNEXT Instrucciones Para El Ensamblaje

4.4.4. Refrigerant charge

EN
After the vacuum procedure, the system must be charged with the type of refrigerant shown on the
compressors dataplate and the condensing unit dataplate, or an alternative permitted refrigerant
type. For a correct charging procedure, after having applied the vacuum it is good practice to
pump part of the refrigerant into the compressors to "break the vacuum"; now start the
compressors to allow them to draw in the remaining part of the charge.
To quantity the volume of the refrigerant charge correctly, use HPB and LBP pressure gauges
connected to the pressure test points provided; the pressure values must be compatible with the
working conditions of the condenser unit.
CAUTION: Refrigerant gas mixtures must be injected into the system exclusively in the
liquid state
DANGER: For charging, recovering and checking the refrigerant, use low
temperature protection safety gloves. Charging procedures must be carried out only
by expert technical personnel.
Leaks inspection
A system can function correctly through time for the entire lifetime of the compressors only if all
prescriptions concerning correct installation are observed, including the absence of refrigerant
leaks; it is important to conduct leak tests on the welds using methods and equipment that are
suitable in relation to the type of refrigerant gas involved.

Operating cycle

The systems must be sized in such a way that the limit of 5 on / off cycles per hour is not exceeded.
Tripping of the overload/current surge protections stops the compressor, which will be restarted only
after the time required for the protector contacts to reset.
Operating times
The system must be sized for 80% max of normal operating time.
100% compressor operation is possible only in severe loading and ambient temperature conditions
that are outside the permissible operating limits.
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