U S Air Force HVAC tech in Baghdad tasked with the following........... Take one 4.5 ton R-22 Environmental Control Unit (ECU) and ATTEMPT to make it operate on R-134a. This is NOT a joke, the request came from a man who wears eagles on his collar.
I'm looking for guidance on replacing the 208-230v 3 ph hermetic compressor with a comparable unit that is 134a compatable. Also need the matching TEV/TXV. Our most modern ECU runs on 134a but uses a massive scroll compressor that physically won't fit in place of the current hermetic. It does however have an expansion valve that I may be able to utilize.
Time is short and this is a serious request for help.