Hi , nice build
if you permit i can add some suggest to your build .
rotary compressor are very hoter compressors , it can reach in normally operating sistem till +120 degree.
if you havent used before an rotary you should know that this compressor electrical engine are cooled by HOT GAS , and NOT by vapour as the reciprocating use electrical engine bottom.
this mean crankcase of the compressor SHOULD be cooler as the discharge pipe hot gas, if the crankcase is hoter that mean something goes wrong with your superheat.( add more flow - short the cap tube , change cap tube to another large inleet)
rotaryes are made for hight back pressure application ( + degree application), using as refrigerant R410a , R407c or the newer R32.(replace R410a) , that mean in the suction they play with ~8 Bar , but in LBP you will be near 0 - 0,5Bar not every rotaryes will like this pressure in suction , they will got very hot the solution is to use a large inleet cap tube , or shorter that actually you use , that add more Flow .
R410a design use a large electrical engine and small compressor pump compared to R407c desings compressor ... that way best compresor for our OC condensing units are the R407c rotaryes.
the BTUs ( brithis thermal units) are calculated regards ASHRE tests for an 7,2C* evaporating temp using his refrigerant R410a , with ~ 5,5kw cooling power but his displacement ~ 22-23 ccm? , in LBP you will be intrested about displacement of the compressor .
the compressor that you use are an large electrical engine with an small pump .so this compressor will eat more power input at his pay for his performance in LBP , in LBP application( R404a , R507 , R452a , R449a etc..) you wont need large engine but need large pump , because you play at low suction pressure!
as example : an R407c compresor with 18.700BTU should have over 30ccm witch will be a beast
another tips is to use the discharge pipe sizing as the compressor port are ...in your case think is atleast 8mm or 9,7mm ( 3/8`) to avoid to overheat the compressor ,
the suction pressure can be 10 or 12mm that arent very crucial in LBP , but discharge pipe are!
hope my tips will help you!
regards!
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