Would just like to point out the amount of knowledge in this thread. I don't post as often as I should, but read this forum multiple times a week and for any tech that wants to be better this is the place to be. AR...happy you fixed the problem!
Yes im measuring pressure and temp at the evap. Ill drop the SH a few degrees. I know it is achievable. After the box got down to temp I adjusted the valve and went a little to far so can get it to 4 no problem.
Originally Posted by icemeister
Good deal on the SC then.
Yea I know the tev controls SH. With the smaller cartridge pressure was more of where I wanted it at around 8 or 10 psi but as already discussed, I couldnt get SH below 25 at the evap. I did have a colder box though..
Glad I wont have to unbraze the valve and pull the nozzle.
The box is in ambient conditions. That was accounted for when they sized it. They set it up for 115 degree ambient and a -15 degree box.
Ill swing by monday and get the sh to 4 and see how it goes. Just seems like its struggling to maintain 0 and sub 0 temps and is running 24/7, except for three defrost cycles.
Is there a pressure drop between the evap and the compressor?
I know TXV's are not pressure regulators, But I have seen coils running proper superheat but overloading the suction line and raising the SST. had to increase superheats in order to reduce the load on the suction line to achive desired SST.
It's rare, but I've seen it
Havnt checked. Will surely take a look monday.