Description

Because of the mixed R**7C is boiling working medium, in order to guarantee its mix of ingredient does not change, so R**7C must liquid filling. If the system R**7C happened refrigerants leak, and the performance of the system obvious change in, the system in the rest of the R**7C can't use recycling, the vent system must be the surplus within the R**7C refrigerants, to filling new R**7C refrigerants