Vocab
What uses fluorescent dye and ultraviolet light to detect leaks?
Fluorescent Dye Leak Detection
What senses flame and tells the blower motor to turn on?
Flame Sensor
Cylinders that contain a corrosive refrigerant must be inspected every ___ years:
5
A device used for creating vacuums to dehydrate an HVACR system is a ____.
Vacuum Pump
A refrigerant cylinder designed to hold recovered refrigerant is what color?
Grey body, Yellow top
What is a high-side service valve that is mounted at a compressors discharge port providing a shutoff between the compressor and the condenser?
Discharge Service Valve(DSV)
Pressure Switch
A low cost method used to confirm exact leak locations:
Bubble Solution
A pressure gauge that is specifically designed to measure lower-than-atmospheric pressure is a:
Compound Gauge
Which type of refrigerant contains no chlorine?
HFCs
What valve keeps air out of refrigerant lines in AC units?
Schrader Valve
What part turns the system off when over heating?
High Limit Switch
When a service valve stem is turned so that it is halfway between front and back seats, it is considered___:
In Mid Position
A technician must use a____ to access small hermetic systems that do not have service valves or access ports.
Piercing Valve
What do HCFC's contain?
Hydrogen, Chlorine, Fluorine, and Carbon
What is a thin walled tube of elastic metal bent into a circular shape that straightens as pressure inside is increased?
Bourdon Tube
R-?
W-?
G-?
Y-?
C-?
R-Power
W-Heat
G-Indoor Blower
Y-Cooling
C-Common
A refrigeration system should be____ before a brazed-on piercing valve is installed:
Recovered and Evacuated
An externally threaded valve with a spring-loaded center pin is called a:
Discharge Service Valve(DSV)
A single chlorine atom can destroy how many ozone molecules?
100,000
What is a service valve that is installed between the condenser and the inlet of the liquid receiver?
Queen Valve
What does AFUE stand for?
Annual Fuel Utilization Efficiency
Disposable cylinders would be stored at temps below ___ to prevent refrigerant pressure build-up:
125°F
The device that engages an extra spring in a pressure gauge to adjust the gauge's calibration to high graduation marks on its scale is a:
Retarder
Reusable refrigerant containers under high-pressure must be hydro statically tested how often?
5 years