Residential and light commercial split air conditioning systems using R22 and R-410A

1
Both R22 and the newer R-410A operate within the same range of condensing and evaporating temperatures.
2
R22 is shipped in a pink container. R-410A is shipped in a green container.

3
The pressure of R-410A is approximately 1.6 times greater than R22.
4
The recovery and recycle equipment used for R22 can also be used to recover and recycle R-410A.
5
R22 systems use polyester oils for lubrication. R-410A systems use mineral oils for lubrication.
6
Evacuation to 500 microns is recommended for both R22 and R-410A systems, however deep vacuums will not separate moisture from POE oils in R-410A systems.
7
All R-410A units require a liquid line filter drier.
8
Leak checking a R-410A system can be safely performed with a mixture of nitrogen and R-410A.
9
R-410A is a drop in replacement for R22.
10
Refrigerant leaving the compressor has three sources of heat. They are evaporator, motor windings and ________ of ________.
11
Convert these R22 pressures to saturation temperatures. Suction line: 70 psig and Discharge line: 225 psig.
12
Convert these R22 pressures to saturation temperatures. Suction line: 118 psig and Discharge line: 365 psig.
13
Convert these R-410A pressures to saturation temperatures. Suction line: 55 psig and Discharge line: 175 psig.
14
Convert these R-410A pressures to saturation temperatures. Suction line: 142 psig and Discharge line: 475 psig.
15
At 120 degrees F, R-410A will have a gauge pressure of 417 psig.

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Refrigeration Service Engineers Society
Twin Cities