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Question on high side pressure reading
August 16, 2012
3:11 pm
New Member
Forum Posts: 1
Member Since:
August 16, 2012
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You are correct that 122 psi corresponds to 70F. However the refrigerant in the condenser must be hotter than the water in order to reject heat to the water. So the refrigerant saturation temperature on the high side will be more like 90F, corresponding to a higher pressure (180 to 220 psi).

March 18, 2012
9:25 pm
Forum Posts: 7
Member Since:
March 19, 2011
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I have a Marine Aire chilled water 16K BTU split system with a 12K and a 4K air handler. The water temp here in Mexico is 70F. According to the Marine Air manual, the high side pressure should be between 180 and 220 PSI at that temp, but when I look at a R-22 temp/pressure chart, I see that the pressure should be at about 122 PSI. Why the difference or what am I missing?

Thanks, Geoff