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danielt_smith
22-11-2008, 12:48 AM
Have just started working with 407c. Don't come across it to much in Australia yet and didn't look at it in any detail at Trade School.

This question probably is covered by general gas laws but....
How does bubble/dew pressures affect my gauge readings?
Should I be using bubble press/temp for high or low side readings, or are all readings of refrigerant related to Dew press/temp chart????

Any good articles on the web with a simple answers?

Thanks
nike123
22-11-2008, 07:08 AM
Have just started working with 407c. Don't come across it to much in Australia yet and didn't look at it in any detail at Trade School.

This question probably is covered by general gas laws but....
How does bubble/dew pressures affect my gauge readings?
Should I be using bubble press/temp for high or low side readings, or are all readings of refrigerant related to Dew press/temp chart????

Any good articles on the web with a simple answers?

Thanks

The evaporator (or compressor suction) superheat is derived from the Saturated Vapour (often known as the Dew Point) P-T table.

Sub-cooling of the condensed liquid is derived from the Saturated Liquid (Bubble Point) P-T table.

www.centrogalileo.it/nuovaPA/Articoli%20tecnici/INGLESE%20CONVEGNO/RIVOIRA%20inglese.doc (http://www.centrogalileo.it/nuovaPA/Articoli%20tecnici/INGLESE%20CONVEGNO/RIVOIRA%20inglese.doc)