HVAC 1
What is Atmospheric Pressure?
14.696PSI
This component lowers the pressure & temperature in the refrigeration cycle
Metering Device
The Gold piece that is on your gauges that the refrigerant flows thru is called
The Manifold
What is a BTU?
British Thermal Unit- The amount of heat required to raise one pound of water one degree Fahrenheit
R-410A, R-22, R-134a
This chart is used to accurately find the correct pressure in correlation to the ambient air
Temperature Pressure Chart
The 3 Gas Law's are?
Boyle's, Charles, & Dalton's
Name any 2 out of the 4 Leak detections
Soap & Bubbles, Halide Torch, Electronic leak detector,& ultraviolet
All Molecular motion stops at what degree Celsius?
-273 Celsius which is -460 Fahrenheit
The Color of a Recovery Tank is?
Gray Body Yellow Top
What device receives 24V and throws voltage when calling for Cooling
The Contactor
True or False? When there is Superheat there is liquid...
False
Name the 3 terminals on a Compressor
Common, Start, Run
What must be removed from the condenser unit before starting to braze?
Shrader Valve Pin
The Ground wire on most systems is color-coded as...?
Green
When adding Nitrogen to a system before brazing is called?
Purging
How much PSI is suppose to come across the Gas Regulator?
7-11
The Formula to convert Celsius to Fahrenheit is?
F=(1.8XC)+32
EPA stands for
Environmental protection Agency
To change psig to psia, you must...?
Add 14.696
A "Lower Flammability" refrigerant is in what Safety Group?
A2 or A2L
A system using R-22 on a 95 degree day should have a pressure of?
181.8
List the full process of operation of a Furnace when calling for Heat
Inducer fan comes on, Pressure switch closes, Gas releases into the Gas valve, Ignitor comes on to start flame, blower motor comes on to push hot air across the coil.
A transformer steps down from ___ to ___
120 to 24
Name the 5 types of Compressors
Scroll, Rotary, Centrifugal, Scroll, & Screw