ABSORBTION........too funny.
Copeland cares about compressor cooling. and recommends 30 dg sh, @ the comp. 1dg sh would be fine for protection.
ABSORBTION........too funny.
I think they call 404a a "near azeotrope" and so its fine.....However not the case for 414b.
We protect it by keeping it cool and ensuring that no liquid returns, I'm just saying with a reefer system charging it by checking compressor sh is a poor practice. I'm not saying it shouldn't be checked but sh should be checked and set at the evap. If its set 10* at evap but running 45* at compressor then there needs to be secondary means of cooling the compressor.
10-4, I agree. The original post was for some explanation on charging or rules of thumb. (not sure how to repost with my reply) So I gave a few. This not being a diy site, Didn't want to give to too much info. Just enough so anyone in the trade could find a few key points helpful. If we want to go crazy...I want pressures, sh, sc, amp draw, sight glass, were going see this box satisfy and make sure she pumps down. In the mean time if this isn't our account were checking the other equipment and working up a maintenance contract. Who was the last company out here?
Copeland recommends a minimum 20 to 40 degrees compressor superheat. Within this range you should be able to get the right evap SH. Compressor SH always trumps evap SH. Is this 59 degrees the temp you want or the temp you are getting before topping the charge off?