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10-28-2012, 02:05 PM #27SH at the pump is not application driven (it doesn't matter whether medium or low temp).
To prevent the possibility of liquid floodback to the compressor, you never want to see the SH below 20°F.
Likewise, to prevent a pump from seeing an early grave by forcing it to operate outside of its design envelope, you never want to see the SH above 40°F.
So there's your range......between 20°F and 40°F at the pump.