Refrigerant Type: R-22
This is a packaged A/C for an RV, with two seperate compressors and refrigerant plumbing. The condenser and evaporator are each shared by both systems (common fins, but seperate tubings.)
Refrigerant is R-22. Each system has a Thermostatic Expansion Valve and a service port on the suction line just before the accumulator.
System built in 1994 and appears to have never been worked on before. Condenser and evaporator are both clean, and fins are straight. I couldn't find any evidence of leakage.
Everything seems to work, but it is just not very cool.
The unit was removed from the RV and is sitting on a cart in open air. I don't have any pressure readings (since I don't have the right connector), but here are refrigerant line temperatures entering and leaving all of the components of system #1, taken with an infrared thermometer (System #2 performs just the same way, and has very similar temperature readings):
. . . . . . . . . . . . . IN . . . OUT
Ambient air . . . . 87
COMPRESSOR . . 67 . . 131
CONDENSOR . . 131 . . 100
TXV . . . . . . . . . . 96 . . . 51
EVAP . . . . . . . . . 67
Cooled air . . . . . . . . . . 67
Here is the question:
Do both these systems just need more refrigerant, or is this just as good as it gets with R-22?
(Could both systems have really leaked out the same amount over the years?)
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