[Jack Houpe]

Here is my uneducated thought on the new Freon gasses out there right now and their higher pressure. The old systems were on or off state, that means when setpoint was reached it turned off and when temp went above that set point it turned on, the old scroll compressors can't modulate the head pressure and the only way to get cooling is the turning liquid to gas through the orifice in the expansion valve at whatever pressure it requires. The new DC 3 phase compressors run almost 99 percent of the time but at different speeds, in order for the expansion valve to expand liquid to gas it must be at a higher pressure even at low compressor speed. Sure would like a HVAC guy to chime in.