superheat setting for freezer

[Pauuly48]

hi everyone, I am still having trouble setting the superheat on low temp equipment. I am working on a two door reach in freezer and need to adjust the expansion valve or at least make sure it is working properly. I usually wait until inside temp is around 8 degrees before I start checking superheat the goal is a 0 degree box. Can you guys help me and give me your ideas and your proceedure for adjusting superheat on low temp. Thanks for any help, Paul

[nightranger121]

A quick check on the TXV would be to stick the bulb in a cup of hot water... your suction pressure should rise within a few seconds. Actual superheat for that coil, I believe, should be around 4 to 6 degrees or so.

[powell]

hi everyone, I am still having trouble setting the superheat on low temp equipment.

Pauuly,

What troubles are you having?

[Pauuly48]

I am having trouble with the math for example a negative 10 degree coil and a 6 degree superheat would I need 4 degrees on my pipe temp.?

[smilies]

I am having trouble with the math for example a negative 10 degree coil and a 6 degree superheat would I need 4 degrees on my pipe temp.?

That would be -4*F.

[Pauuly48]

Thanks makes sense now.