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Ron342 · 04-03-14, 07:54 AM

OK,OK I'm building the thermosiphon condenser spiraling up around the water heater. Plan to run it from the drain up to tie into the relief fitting and I have 5000 but r22 window unit to hack first using its evaporator then a water tube in tube unit if it ever gets warm enough to finish the Geo holes!
I can braze weld etc but no ac experience and a 40 yr old mech engr degree doesn'help! Here's where I'm hung - the condenser will likely be oversized and certainly will have a different flow characterstic from the window shaker condenser as will the tube in tube evap when that gets going. How will I know when to stop adding freon or propane? I assume I just charge til I get a p/t equal to 120f at the top of the condenser? Or do I look at the evap temps???????
The window unit has a cap tube.
Thanks

04-03-14, 07:54 AM	#94
Ron342 Apprentice EcoRenovator Join Date: Feb 2010 Location: Maryland Posts: 120 Thanks: 26 Thanked 12 Times in 8 Posts	A little charging advice please??? OK,OK I'm building the thermosiphon condenser spiraling up around the water heater. Plan to run it from the drain up to tie into the relief fitting and I have 5000 but r22 window unit to hack first using its evaporator then a water tube in tube unit if it ever gets warm enough to finish the Geo holes! I can braze weld etc but no ac experience and a 40 yr old mech engr degree doesn'help! Here's where I'm hung - the condenser will likely be oversized and certainly will have a different flow characterstic from the window shaker condenser as will the tube in tube evap when that gets going. How will I know when to stop adding freon or propane? I assume I just charge til I get a p/t equal to 120f at the top of the condenser? Or do I look at the evap temps??????? The window unit has a cap tube. Thanks