Quote:
Originally Posted by dc€x
Original H2O in system in "standard state"
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R410a 1000g => 10 mg H2O (max. allowed H2O 10 ppm)
POE-oil 300g => 15 mg H2O (... " ..... " ......... 50 ppm)
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Purging alternatives ... pipeline 2x7,5m=>volume 0,5 litres
Propane (R290) 0,5 litres => 1/100 mg H2O (max. allowed H2O 10 ppm)
Propane (95%) 0,5 litres => 0,2 mg H2O (max. allowed H2O 200 ppm)
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AIR 0,5 litres => 7,5 mg H2O (+15degC, 15g moisture in 1m3 of air)
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Let me see if I understand.
Even if I use compressed atmospheric air (not specially dried) to pressure test the lines, since there is so little volume in the linesets, I won't be introducing a total amount of H2O that is outside of specification?
Further, if I then vacuum the lines to 500 microns (or, at least, below the vapor pressure of water), then the bulk of even that limited amount of water will be removed from the linesets?
Tom