refrigerant phases
What takes high pressure and makes it low pressure?
TXV
This helps take out moisture and oils that go through the system?
Filter drier
When would you use superheat to charge a system?
If the system has a fixed orifice instead of txv
1 chlorine atom can destroy up to how many ozone molecules
100,000 ozone molecules
what is typically the ideal superheat you should have in the right conditions?
10-15 degrees
Where would you find HPL?
Between the condenser and txv
This helps the condenser fan run so it can reject the heat outside?
Capacitor
What was the name of the treaty that addresses ozone depleting substances?
Montreal Protocol Treaty
What 2 things does the 608 certification allow a technician to do?
To purchase and or handle refrigerants.
What does HFO stand for?
Hydrofluoroolefins
where would find LPLV?
Between the txv and evaporator
In what component does superheat take place?
Evaporator
When would you use subcooling to charge a system?
When the system has either a TXV or EEV(electronic expansion valve)
What is the typical ideal subcooling temperature ?
10-12 degrees unless otherwise specified on data plate..
What series of refrigerants are near azeotropic blends?
R-400 series
Where would you find subcooling?
Right after the condenser before the receiver
When you place and RTU on a roof, what must be installed for it to sit on and penetrate down through a ceilling?
Curb
R-22 refrigerant boils around what temperature?
40 degrees
What two things do you subtract to get your subcooling?
Liquid line temp and your high side saturation temp
Most HCFC binary and ternary blends use what kind of lubricants in them?
alkylbenzene (synthetic)
where would you find superheat?
between evaporator and compressor
In some ac high pressure systems, these are sometimes installed to help pressure hammering?
Muffler
When you are going to do a repair to a running ac system and you already know all the information. What would your first step be before making your repair?
lock the refrigerant into the condenser
What two things do you subtract to get your superheat?
Suction line temp and your low side saturation temperature
When a blended refrigerant leaks out of a system, what process takes place within the refrigerant?
Fractionization: a physical separation process that divides a mixture into smaller components or fractions,