Fyi, still in trade school. Working on a small refrigeration trainer (about a 12ft cubed cooler). Instructor had to step out so didn't get a chance to grill him and we're now off 'til Monday. I'll go nuts racking my head over this so that's why I'm coming to you guys.
After running for 15 mins
Suction pressure: 16 psig
Boiling temp from PT: 16°F
Suction-line temperature: 26°F
Superheat: 10°F (Target for these is 8-12)
After loading (opening cooler doors wide open, for 15 mins)
Suction pressure: 28 psig
Boiling temp from pt: 32°F
Suction-line temperature: 36°F
Superheat: 4°F ?
Mind you I'm still learning everything so I'm not ruling out the fact that I could be doing something wrong. What are some factors that may cause this and/or why would my superheat be going DOWN when loading the evaporator? The only thing I could think of was a faulty TXV but I would LOVE some ideas or insight!
Now that I think on it again, my partner and I may not have properly purged the air from the gauge lines before taking those readings, but would it have this effect?
Thank you so much for any comments/suggestions.