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T40 Blast Chiller not running properly
Hey Guys.
Got my T40 Delfield Blast Chiller giving me some trouble. It’s a 404A semi hermetic compressor (Model is: 3DB3F33KE-TFC)
Condensing unit is Trenton, Model#: W075L6-IT3A-3166
TXV is this one https://www.skh-kaeltetechnik.de/Exp…without-NozzleFirst indicator was short cycling, I happened to be walking by it and heard it go on and off repeatedly, I then went to check it out and here’s what I got.
Unit’s running, Sight Glass is full, I don’t see any rivering, flashing or anything.
Oil sight glass remains clear, I can see 3/4 of it is full and there’s no foaming or anything.When I was checking it, I had it set to run to 38*F and then shut off, one of it’s settings, from my prior checks, it runs about 15-20 PSI suction over 227 PSIG head
Today it was running 5-8 PSI (-32.9*F Evaporating) over 337 PSI (125.8*F Condensing) SLT: 74.5*F this was after it ran for 5-10 minutes, which is way low head and way too high head, LLT is 217*F. S
Now, here’s what scared me. 107*F superheat.
Sounds really bad to me.
My first thought is a restriction, I didn’t feel a signifcant temp difference on the filter drier so I’m thinking it’s the TXV, when the unit shuts off the pressure stays so it’s not leaking by on the valves or the solenoid valve.
I was going to take the performance chart and check amps to see but my first thought is TXV. There’s no pressure tap at the txv so I can’t check SH at the evap.
Either the Drier is partially plugged or the TXV is shot, TXV is about $1000 so I really hope it’s not that.
What do you guys think?
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