how should you controll your hotgas bypass?
i mean if you are benching you are not able to adjust your temperature.
the rotary will love the hotgas and will die from overheating
we did some tests in the last days:
http://www.extremecooling.net/index/...ug_cascade.wmv
the hotgas bypass will increase discharge and compressor temp.
in my opinion the best solution ist to do a bypass after the plate hx. install a t fitting and a mgv (magnetic valve) to push the liquid refrigerant in the suction line or the phasesep of the rotary. there it can evaporate, raises suction pressure, cool the rotary and also raises evap temp. your rotary would rather prefer this method
the painting of your copper pipes doesn´t look very proper.
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