Magneti Marelli Clima-Tech Plus, User Manual, Page: 10 / 44

4.2.2 Refrigerant storage precautions
Do not allow mixing various types of refrigerants removed from A/C systems.
CLIMA TECH EVOLUTION is designed to support only R134a.
To avoid mixing various refrigerants, it is recommended to store them in separate cylinders.
Cylinders may not contain oil or other contaminants and the refrigerant they contain must
be clearly indicated.
4.2.3 Conditions for further usability of refrigerant
Knowing the origin and the age of the A/C system is very important for deciding about
further usability of refrigerant. A/C system repairs and maintenance greatly impact the
refrigerant quality.
If the system was not emptied correctly or not properly cleaned, the refrigerant and oil
may be highly contaminated. If you do nit know the history of the A/C system, recycle the
removed refrigerant in at least one cycle before it is reintroduced in the system.
If the operator is not certain how much contaminated the refrigerant is, it may be
checked using a special acidity and water content measurement set.
4.2.4 Recycling remarks
Replace the recycling system filter set regularly (see “Messages” section), to assure correct
operation of the device.
Refrigerant recycling should be carried out even if all parameters indicate that it is not
necessary.
4.2.5 General information
Before the refrigerant is introduced in the system, make sure the system was cleaned and
emptied.
All recommendations specified in this manual must be complied with to assure that the
system is not contaminated before filling it with the refrigerant.
Regularly clean and maintain the device if it is frequently in contact with contaminants; it
is important that the contamination remaining after the last interference in the system is
not transferred to the new refrigerant
4.3 Safety devices
CLIMA TECH EVOLUTION is equipped with the following safety devices:
• Pressure sensor: switches off the compressor if excessive pressure builds up.
• Pressure relief valves
• Main switch: allows to disconnect the power supply if it is necessary to interfere in the
device.