He said they're stacked (one on top of the other) plus it's a 92' yacht. Every stacked system I've seen, the hoses were a good 6' or 7' above...
1/2HP is really light for 10 tons of a/c chillers, especially if they're stacked and you have 10' of head pressure. Upgrade the pump and see if...
Look at the loop temp on one of your individual A/C's. You'd only run one chiller when it's not that hot outside, or you're only on one...
1/2 HP sounds like it's not enough flow for the raw water side. You need to speak to someone real knowledgable or you need a really good tech....
