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Residential and light commercial split air conditioning
systems using R22 and R-410A |
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1 |
Both
R22 and the newer R-410A operate within the same range of condensing
and evaporating temperatures. |
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| 2 |
R22 is shipped in a pink container.
R-410A is shipped in a green container. |
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| 3 |
The pressure of R-410A is approximately 1.6 times greater than R22. |
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4 |
The recovery and recycle equipment
used for R22 can also be used to recover and recycle R-410A. |
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| 5 |
R22 systems use polyester oils
for lubrication. R-410A systems use mineral oils for lubrication. |
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| 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. |
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| 7 |
All R-410A units require a liquid
line filter drier. |
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8 |
Leak
checking a R-410A system can be safely performed with a mixture of
nitrogen and R-410A. |
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| 9 |
R-410A is a drop in replacement for R22. |
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| 10 |
Refrigerant leaving the compressor
has three sources of heat. They are evaporator, motor windings and
________ of ________. |
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| 11 |
Convert these R22 pressures to
saturation temperatures. Suction line: 70 psig and Discharge line:
225 psig. |
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| 12 |
Convert these R22 pressures to
saturation temperatures. Suction line: 118 psig and Discharge line:
365 psig. |
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| 13 |
Convert these R-410A pressures
to saturation temperatures. Suction line: 55 psig and Discharge line:
175 psig. |
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| 14 |
Convert these R-410A pressures
to saturation temperatures. Suction line: 142 psig and Discharge line:
475 psig. |
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| 15 |
At 120 degrees F, R-410A will
have a gauge pressure of 417 psig. |
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SCORE =
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