Blue Box - 91
12.3.3 Refrigerant charge
- Connect the refrigerant gas cylinder to the male 1/4 SAE charge connector on the liquid line and allow a small
amount of gas to escape in order to purge the connection hose of air.
- The circuit must be charged exclusively with liquid; therefore, if the cylinder is not equipped with a dip pipe it
must be turned upside-down.
Units operating with R407C must be charged exclusively with liquid
refrigerant by way of the charge connection on the liquid line.
12.4 ENVIRONMENTAL CONSIDERATIONS
Laws governing the use of substances detrimental to the ozone layer prohibit the dispersal of refrigerant gases in
the environment, obliging users to recover refrigerants at the end of their useful life and consign them to the
dealer or to specific collection centres.
Refrigerants R22 and R407C are mentioned among substances subject to special monitoring regimes established
by law, and as such they are subject to the prescriptions indicated above.
Use special care during maintenance work in order to limit the risk of
refrigerant leakage as far as possible.
Summary of Contents for SIGMA 2002
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