Type 3
This refrigerant operates in a vacuum under normal conditions.
What is R-123 (or R-11)?
This act made venting refrigerants illegal.
What is the Clean Air Act?
A technician evacuates a system but the micron gauge rises rapidly after the pump is isolated. This indicates this issue.
What is a leak or moisture still in the system?
When recovering large amounts of liquid refrigerant quickly, this method is preferred.
What is push-pull recovery?
A small appliance with a non-operational compressor requires this type of recovery.
What is system-dependent or passive recovery?
This is the required evacuation level for low-pressure systems before opening.
What is 25 mm Hg absolute?
This certification type allows technicians to work on all appliance categories.
What is Universal certification?
A system with high head pressure and normal subcooling may indicate the presence of this.
What are non-condensables?
If recovery slows significantly, this is often occurring inside the system.
What is refrigerant vaporization/pressure equalization?
If the system has no service port, this must be installed to recover refrigerant.
What is a piercing valve or access fitting?
This device is used to remove water from a low-pressure system.
What is a purge unit?
This cylinder color is typically used for recovered refrigerant (industry standard).
What is gray with a yellow top?
This condition occurs when moisture reacts with refrigerant and oil to form acids.
What is acid formation?
Overfilling a recovery cylinder can lead to this dangerous condition.
What is hydrostatic pressure increase (possible explosion)?
Heating the compressor during recovery helps accomplish this.
What is increasing refrigerant pressure to aid recovery?
This condition occurs when air enters due to system pressure being below atmospheric.
What is infiltration?
This is required when disposing of appliances containing refrigerant.
What is proper refrigerant recovery?
This tool is most accurate for measuring deep vacuum levels.
What is a micron gauge?
This safety device on recovery cylinders prevents over-pressurization.
What is a pressure relief valve?
This is required before disposing of a small appliance, even if it appears empty.
What is recovering remaining refrigerant?
This procedure involves raising system pressure slightly before leak testing.
What is pressurizing with nitrogen?
This documentation tracks refrigerant usage, leaks, and repairs for compliance.
What are service records or refrigerant logs?
This procedure removes moisture by boiling it off under vacuum.
What is dehydration (deep evacuation)?
This is the maximum recommended fill level of a recovery cylinder.
What is 80%?
This situation makes system-dependent recovery unsafe.
What is a system with a burned-out compressor or electrical hazard?