[RussWhite]

Tom,

I still have original thermostats and my system still operates as it was designed. I have attached a schematic and logic table for the operation. If you follow it through it confirms the Low speed and High speed operation I described. I know that some have changed themostats and given up the ability to limit compressor operation with the LOW speed setting. Since I manage my own loads without the interlock between AquaHot and Air Conditioning I find the option to control the compressors running very helpful. Russ