Hello
I'm making currently 2 stager with monsterous big 230V 1PH rotaries 2 rotaries over 25K BTU (2+HP).
+4 pressure gauges, 2 controllers, bypass, 2x cut-off, big expansion tank, 2 plate HXes (one as SLHX on 2nd stage).
Case with 4mm thick steel baseplate (because each compressor is over 25kg ).
Specs :
compressors: Toshiba PA290X3CS-4MU1 on 1st stage, plus Toshiba PA270X3CS-4MU1 on 2nd stage
evap: steeper 54mm
XV: captube 0.9 mm / captube 0.9 mm (on both stages)
HX: plate HX , 30 plates
condenser: 6.0 Kw, alu-cu, cooled by FENGDA FDA350E4/G 350mm 230V fan
refrigerants : R507/R1150
oilseparator : Shine Year automatic
safety : 2x RANCO cut-offs (one to each stage), Torrecilla 2.4l expansion tank
case : Laser cutted and powder coated case (black), wheels
others: Bypass valve - Castel handvalve, 4*REFCO panel gauges, Carel "easy" controller (turn on 2nd stage automatically when 1st stage is enought cold), PID controller as a temperature display on 2nd stage, red paint coated pipes, 350mm EBM fan on back wall, cork sound insulation.
It'll be worklog .
Today I plan to screw all parts to baseplate
Regards
Peter
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UPDATE 28.11.2011:
Unloaded temperatures . Carel controller on 1st stage shows around 8*C higher temperature than real, and that's end of it's probe tune area .
Loaded with 315W dummyload .
Sound level loaded .
Black cascade and mine black cat .
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