Originally Posted by
ThirdHatt
Actually Sky, it is already set up to run on one or two compressors. I have never used both at the same time because I have been pleased with more than acceptable heating/cooling from running just one. Now, surely in the summer with several folks on board and all 11 air handlers blowing, I will need both units running.
They work in sequence. The water needs to be chilled to a certain temp for the air handlers to be able to extract cool air and the more air handlers removing the chill from the water then the more need for compressors to chill the water. Even on heavy use days, if you're only cooling or heating up to 1/2 the boat, you would have maximum cooling or heating from just one unit. The need to run two at the same time is when the demand is high on the system with most or all of the air handlers running. Even if one unit looses freon or goes out completely, it does not inhibit the system from functioning just fine. The whole boat will still get cool or warm, just not cold or hot!