High Side
Is the high side the big or little copper tube?
Little
In cooling mode is the vapor line hot or cold?
cold
It is ok to release R454B into the air. T or F
F
Why do we need a low side?
So the heat in the air will move to the cooler refrigerant.
What do you pull a vacuum down to?
500 microns
What state is the refrigerant in when it leaves the condenser goin to the evap?
High Pressure/Temp Liquid
which hose is used to measure the low side pressure?
blue hose
how full can we fill a recovery cylinder?
80%
Is atmospheric pressure is the same at sea level compared to 5000 ft elevation? T 0r F
F
What should your evap temp be?
20 to 30 cooler than indoor temp.
What device is in the high side that stores extra liquid refrigerant?
Receiver
Why do we charge in the low side?
suction side will suck in the refrigerant
Is R410 a blend or a pure refrigerant?
blend
What is the temp called located inside the coils?
Saturation
What is Delta T?
difference in return and supply temp
The compressor has two copper tubes, what are they referred to as?
True Suction and discharge line
What is an accumulator?
catches liquid refrigerant before the compressor
What is the classification of R454B?
A2L
What is CTOA mean?
Condensing temp over ambient
What is one way to measure CFM in a unit with strip heat?
Temp Rise Method
Explain subcooling?
Great Job!
How does a TXV work?
sensing bulb pressure rises and falls due to temp of vapor leaving the evap.
What are the three types of Classifications for refrigeration. They are also the categories for leak rate calculations.
Comfort Cooling
Commercial Refrigeration
IPR
What is the inside of the pressure gauge that allows the needle to move?
Bourdon tube
What is the definition of refrigeration?
removing heat from a space or substance and transferring it to another location,