Chiller help

I vote this for the understatement of the year!

Looks like beautiful work professionally done with no skimping on $$. I just remembered when I showed Marmot your boat and the only thing he didn't like was the ac black foam rubber insulation. Bet your new ac would bring him a thumbs up. I know this seems trivial for the scope of work you've shown us, but I like the new salon lamp. I see fingerprints from Charlie's Loocker.[/QUOTE]

If the builder did the air conditioning install properly in the first place, there would be no reason that the OP would be doing any of this work on a 7 year old boat, nor spending a huge expense, nor tearing the entire interior apart, nor a huge waste of his time. All of the air conditioning should have been working 100% on a 7 year old yacht.

You MUST use closed cell insulation. If you put the insulation in water and it soaks it up like a sponge and you can ring it out, its open cell and not for AC or refrigeration.

Marmot was very knowledgable in some aspects of marine engineering. However, he was not completely knowledgable in all of them, yet spoke like he was God and was. Operation of systems and actual usage of some of the systems on yachts under 80' was one area I found him giving poor advice, which might have worked out great if you were on a 50 meter, but not a 15 meter. His biggest problem was the way he belittled and talked to many other members and basically spoke to people like crap on many occasions.

That being said. I've been on and run a few Ellings, their quality is ok nothing more, but their engineering is SERIOUSLY lacking when it comes to air conditioning and especially electrical as well as how and where they mount things. I ran one of them, that you had to physically unplug the shorepower cord from shore before starting the generator because Elling hot wired both feeds directly to the panel, with no electrical selector switch or breakers or safety to go from shorepower OR generator. So If you plugged shorepower in with generator running or opposite, it would fry everything on the boat, the shorepower cord, and electrical on land. Why would any sane person even install chillers on a yacht so small, so many components to go wrong, much costlier, and more junk all over the boat etc. etc. Quite honestly, 4 self contained direct expansion units throughout the boat, a few sea water lines, electric and your done. Chillers are always a lot more labor and maintenance intensive than normal units and are always a headache. Above 70' they're necessary due to energy consumption, but under that only a huge headache. Not to mention they're simply a strange boat, really narrow side walk ways to get to the bow, weird aft deck, really far to the water on the stern, hard to get on and off with the canoe stern deal...……...

Majority of my project was built out using GF Coolfit. Really cleans up and simplifies the project. Implement occasional rubber hosing to allow for movement aboard...

https://www.gfps.com/com/en/products-solutions/systems/cool-fit-4.html

...used reinforced hose, double clamping, and Armorflex at the air handlers.

A good solution to get rid of all the sweating metal valves, some hose clamps and the tedious job of insulating. I like the chiller system, access to the loop components can be an issue.