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Water must be circulated through a chiller during refrigerant  evacuation in order to;

When it is essential to take measures to help release trapped refrigerant from the compressor oil during refrigerant recovery;

When installing any type of access fitting onto a sealed system;

Small appliance recovery equipment manufactured after Nov 15, 1993 must be certified to be capable of;

In general, what is one routine maintenance task which must be performed on most refrigerant recycle machines?

If a large leak of refrigerant occurs such as from a filled cylinder in an enclosed area, what action should be taken when no self contained breathing apparatus is available?

Type I Certification is required for;

When a system is in deep vacuum;

Recovery equipment must be;

Recovering multiple types of refrigerants in the same cylinder;