Title: Vocabulary
Course: HET 190 EPA Certification Preparation > Section: HET 190 EPA Certification Preparation

Vocabulary

Terms

Term | Definitions
Core removal tool | Used to remove schrader valve core without any loss of refrigerant
Fluorescent Leak Detection Dye | Used to fine refrigerant leaks. Used in conjunction with an Ultraviolet (UV) leak detector
Leak detection | The process of identifying refrigerant leaks
Micron gauge | Vacuum gauge capable of reading vacuum levels below 30" Hg
Non-condensables | Air (and moisture) trapped in a refrigeration system which increases the system's pressure and can mix with the system's oil to form acids or sludge
Phosgene gas | A colorless poisonous gas created when refrigerant comes in contact with an open flame
Schrader valve | Provides leak tight access for refrigerant gauge connection on some refrigeration systems.
Service valve | Mechanical valve used to provide a connection when it becomes necessary to hookup a set of refrigerant gauges
Soap bubbles | Used to find leaks in refrigerant systems
Triple evacuation | The process of using a vacuum pump to pull a 500m vacuum breaking it with dry nitrogen, pulling it down to 500m again, breaking it with dry nitrogen, pulling it down to 500m and then breaking the ...
Ultrasonic Leak Detector | Detects the ultrasound generated by the escaping gas
Ultraviolet (UV) leak detector | Uses UV light and florescent dye to pinpoint refrigerant leaks in HVAC equipment