4-stage cascade

[before]

Finally, I've decided not to go for an autocascade but a 4-stager unit.

I've already prepared drawnings with expected size for pipes, item locations, etc.

Here's the check list. I'm now waiting for the needed parts.




Steps

1. Empirical agencement of parts following drawing expectations
2. Inter-parts piping
3. Case building (as expected or revised thanks to step 1)
4. Paintings (both case and compressors)
5. Modding TXVs (one for R1150 and one for R14)
6. Installation of parts into the case + brazing of prepared pipes
7. Empirical realization of a bench station on top of the case + evaporators piping
8. Finishing insulation
9. Vaccuming all stages + filling them with R290
10. Vaccuming again
11. Charging and testing