View Full Version : refrigeration pressures
11-25-2005, 08:40 PM
I recently acquired a used commercial 3 door Sub Zero freezer with a Copeland 404A compressor. What refrigerant pressures should I expect to see during start-up.
I deleted your double post, you had this thread also posted in the resi section. Forum Rules (http://hvac-talk.com/vbb/showthread.php?threadid=1241)
11-25-2005, 09:40 PM
You can download a utility direct from the copeland website that can tell you pressures, temps, amp draw, operating envelope, etc... for any copeland compressor & and it's corresponding refrigerant(s)
You may have to form a quick account to access it.
EDIT: The utility does not (yet) include alternate refrigerants.
11-26-2005, 11:09 AM
Yeah, real close to 502. Not as close as 408 is, but pretty damn close.
11-26-2005, 05:10 PM
Thanks for your responses, bottem lin is that I emptied the system and weighed in 19 oz. of r 404 a (almost the same as 502 ) as per the instructions on the door for total charge.... End results.... Low pressure 10 psi.... high 190 psi frezzer temp -03 f Every things fine Thanks Rich
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