Continuous excessive moisture collection in the purge unit of a low-pressure refrigeration system could indicate what condition?

What are the characteristics of hydrofluoroolefins (HFOs)?

which condition requires accessing both the high and low side of the system for refrigerant recovery when using the system-dependent (passive) recovery process?

Identify the pressure corresponding to 32 F for R-123

Refrigerant has been recovered from an air-conditioning system and held in a refillable cylinder, in order to replace the condenser coil. The refrigerant;

A company uses a chiller that diverts 55% of its cooling capacity to one of its manufacturing lines and 45% of it’s cooling capacity to air condition the office spaces. Which leak rate category would this chiller be in?

what will back-seating a suction shutoff valve close?

To determine if the system is leaking more than the allowable rate, the EPA allows the use of which one of the following methods to determine the full charge?

Which of the following always falls under the EPA definition for “major maintenance, service, or repair?”

Which of the following actions would always be considered “major” under EPA’s regulations?