u/steadypaper — reddlx

Rack protocol oil fail issues

I came to a call for some

frozen reach in cases that were alarming high temp. First checked and found all cases have airflow and cases were cold just not cold enough. At the rack it’s a 6 compressor rack protocol and I found 3 compressors off on oil so my suction was a little high. Reset the compressors that failed and my suction pressure dropped as well as my case temps rn. My reservoir has no oil level but all of my compressors do. Just wanna know where I should check and do to see why they went off on oil to prevent this. There’s one compressor that has an issue going off on oil kinda consistently every now and then. Could it be a flood back issue bc I also have a compressor in the picture that shows signs of flood back.

u/steadypaper — 2 hours ago

▲ 3 r/refrigeration

Sporlan txv cartridge

I was told that when I replace a TXV always use the sporlan TXV with the pick up screen and where you could put a cartridge inside now my question is how do I determine what is the right cartridge when I’m replacing a TXV for a case because I know it has to do with the tonnage but how do I figure that out thank you in advance. This is an apprentice asking.

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u/steadypaper — 3 hours ago

▲ 1 r/refrigeration

Cut in cut out pressure for cfm

I have a r22 medium temp rtu for produce prep area and the high pressure control for CFB where cut in and cut out was set to 225 and 35 psi differential. So the cfm would look like it’s short cycling almost and cutting in and out often. Obviously w different refrigerants different pressures. I lowered the cut in to 175 to have cfm running longer w the same 35psi difference. Is that okay? Or what should the cut in and cut out be set to?

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u/steadypaper — 1 day ago