Single stage build. Old parts used (2023)

[ogblaz]

Hello all,

Wanted to build this for 10 years. Now the time has come and I made my first single stage. It is my first build but the compressor will be replaced with a rotary one from an old AC unit.
I bought a used ( compressor NJ 6220Z, condenser ) and got evaporator from a friend who made single stages and cascades almost 20 years ago.
It is charged with r404a gas (380Gr) the capillary tube is around 0.7mm (outside diameter 1.9mm).
It is working OK in idle around -46°C but on long loads goes up fast. I really don`t know how to tune it.
Suction pressure is -0.2 bar, discharge is 9 bar.
I only bench 775 socket ...
The total cost is less than 100€ .

Here are some pictures if you have some advice you can give it to me

EDIT: pictures does not work, link to hwbot
https://community.hwbot.org/topic/22...rts-used-2023/

Thanks, Blaz.