R409 Freezer problem

[Btech]

Thanks for all the replys, like I said, I inherited this walkin is tiny
3x8x8. Had already been converted to 409 so I am stuck with it for now.
Compressor is a hermetic tecumseh, will try to choke down TXV but superheat may be a problem.

Any ideas or opinions on max superheat at compressor?? I am thinking 25-28but still worried about starving evap and overheat compressor.

[hvac wiz 79]

Thanks for all the replys, like I said, I inherited this walkin is tiny
3x8x8. Had already been converted to 409 so I am stuck with it for now.
Compressor is a hermetic tecumseh, will try to choke down TXV but superheat may be a problem.

Any ideas or opinions on max superheat at compressor?? I am thinking 25-28but still worried about starving evap and overheat compressor.

Dial it in & watch it. I'm one who likes my SH on the lower end but if you don't fine tune things your not gonna get the temp range you're looking for. are you attempting -10° set point? .. As long as your within the SH range that Tecumseh publishes, even if on the slightly higher end than you like, at least your making SP & shutting down.

O.B.A.M.A.= One Big A$$ Mistake America