Refrigeration Cycle
This component absorbs heat from the space being cooled.
What is the evaporator?
This refrigerant characteristic measures its impact on global warming over time.
What is GWP (Global Warming Potential)?
This type of recovery device uses its own compressor to remove refrigerant.
What is a self-contained (active) recovery unit?
This process removes refrigerant without using external recovery equipment.
What is system-dependent recovery?
This is the leak repair threshold for comfort cooling systems (percentage per year).
What is 10%?
This component increases refrigerant pressure and temperature.
What is the compressor?
This oil type is highly hygroscopic and commonly used with HFC refrigerants like R-410A.
What is POE (polyolester oil)?
This evacuation level is typically required for high-pressure systems with less than 200 lbs refrigerant.
What is 0 inches Hg (or 10 inches Hg depending on condition)?
This is the maximum amount of refrigerant typically found in a small appliance.
What is 5 pounds or less?
This is the leak repair threshold for commercial refrigeration systems.
What is 20%?
This is where refrigerant rejects heat to the outside air.
What is the condenser?
This evacuation level (in microns) indicates a deep vacuum suitable for dehydration.
What is 500 microns or lower?
When recovering from a system with a burned-out compressor, this accessory must be used.
What is a filter-drier?
When using passive recovery, this external force helps move refrigerant.
What is heat?
This is the required evacuation level for high-pressure systems with more than 200 lbs of refrigerant.
What is 10 inches Hg vacuum?
This device controls refrigerant flow into the evaporator.
What is a metering device?
This component prevents refrigerant from flowing backward into the recovery machine.
What is a check valve?
This condition requires recovery equipment rated for high-pressure refrigerants like R-410A.
What is high operating pressure (above traditional HCFC levels)?
This component must not be energized when using system-dependent recovery.
What is the compressor (in certain unsafe conditions)?
This condition occurs when liquid refrigerant enters the compressor and causes damage.
What is slugging?
This is the state change when refrigerant absorbs heat and turns into a vapor.
What is evaporation (boiling)?
This condition occurs when non-condensables raise head pressure and reduce system efficiency.
What are non-condensable gases in the system?
This is the required evacuation level for small appliances using a system-dependent recovery method.
What is 4 inches Hg vacuum?
This EPA rule allows recovery equipment manufactured before this year to have different standards.
What is before November 15, 1993?
When recovering refrigerant, this method speeds up the process by removing liquid first.
What is push-pull recovery?