Βecause of high ambient temps (37 C) and room temperature (30 C) efficiency of Single Stage suffers.
Without load idles at -32.5 C
High Pressure at 275psi / 48 C
Suction freezes till compressor
So I tried to cool the high pressure vapor with a chiller 1/8HP. I used the desuperheater coil to cool the 2 stage.
The temp now at evaporator is -47.5
High pressure is 180psi / 32 C
Suction doesn't freeze till compressor.
My question is, at that situation, I need to add refridgerant?
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