Rob S
04-02-2006, 06:08 PM
I'm looking for advice on changing over some chambers from 23 to 508B. I was told by a person to just use 80% of the original charge. After completely rebuilding one chamber out of 25 this person worked on for years. I have no faith in this persons thought proccess.
The Thermotron units are listed as 8lb charges with a 104psig static @ 21C I'm assuming. Thermotron wasn't any help to me. Becuase I'm not a slave to their will I guess.
The Especs are mostly 5lb charges but there isn't a static rating in the manual or on the nameplate.
It's been a while since I had to calc out this stuff. R-23 @ 120psia and 70F (21C) has a V = 0.6320 R-508B has a V = 0.4622
So (0.6320/1 = 5.056/8) (0.4622/1 = 5.056/x) x=10.938
I would think there would be a need to change some compontents on the low stage as well. Main TXV, low cooling captube, and expantion tank.
The Thermotron units are listed as 8lb charges with a 104psig static @ 21C I'm assuming. Thermotron wasn't any help to me. Becuase I'm not a slave to their will I guess.
The Especs are mostly 5lb charges but there isn't a static rating in the manual or on the nameplate.
It's been a while since I had to calc out this stuff. R-23 @ 120psia and 70F (21C) has a V = 0.6320 R-508B has a V = 0.4622
So (0.6320/1 = 5.056/8) (0.4622/1 = 5.056/x) x=10.938
I would think there would be a need to change some compontents on the low stage as well. Main TXV, low cooling captube, and expantion tank.