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What’s the normal pressure and temperature for an R-22 residential system? Let’s break it down. R-22 systems operate based on the refrigerant’s pressure-temperature chart. π This tells you the saturation temperature at a given pressure — and it’s how you know if your system is working right. π‘οΈ On a warm day — around 85°F outdoor temperature, here’s what you should see: β
Suction Side (Low Pressure) π§ Pressure: 60 to 75 PSI π‘οΈ Saturation Temperature: 32°F to 45°F π This tells you the evaporator coil is cold enough to absorb heat — but not freezing. β
Discharge Side (High Pressure) π§ Pressure: 200 to 250 PSI π‘οΈ Saturation Temperature: 95°F to 120°F π₯ This means the condenser is hot enough to release heat to the outside air. π‘ Why does this matter? Because if the suction pressure is too low, it could mean: β The system is low on refrigerant π« There’s a restriction π¬οΈ Or airflow is poor across the evaporator If the high side pressure is too high, it could mean: β The system is overcharged π§Ό The condenser is dirty β οΈ Or there’s non-condensables in the system β
Always check both pressure and temperature. Then compare them to the R-22 PT chart to understand exactly what the refrigerant is doing in the system. π Like this video and follow for more HVAC repair tips! #r22refrigerant #hvactips #airconditioningrepair #ptchart #hvactraining
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