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noise - Lunaire unit about 22 years old
June 8, 2011
12:00 pm
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Steve Pooler
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November 12, 2008
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Hi Bob~

Luneair was a quality unit but they are long since out of business, and from your description it seems your's is coming to the end of it's life span…All the filtering & lining you may do is not going to help much…I've been thru it all…

The compressor likely has a loose valve plate inside that is making the noise…It was a common issue with that compressor that Tecumseh (compressor manufacturer) later addressed….Sometimes they would last for years (as your's has) and others only months before they self destructed inside & locked up, or just quit pumping refrigerant…Either way, they then got real quiet  Wink

A replacement compressor is like $710 + Freight, Labor & Refrigerant….Then you still have a 22 year old unit with a fan motor/blower & control system that is no longer available…Is a unit that old worth it ???

Especially when the new Dometic Turbo units are so quiet you can barely hear them run…

/2010/11/08/marine-air-vector-turbo-self-contained-ac-16000-btu-115-volt/

 

Steve~

June 8, 2011
8:53 am
bobct
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June 8, 2011
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This topic isn't really maintenance but here goes:

 

I have a Lunair (16k I believe) that's original to my boat at about 22 years. It works great but it's noisey. One of the biggest sources of noise is through the intake vent which is right in the main berth. There's no filter so I'm looking right at the condensor through the grate. The spacing between the slats is also pretty big.

I can easily add some type of filter but can't imagine that would help much. Are there any particular filters that DO cut down the noise level? And/or, can I make the intake a little smaller? It's at least 18"x 18" sqaure off the top of my head.

My other thought was to line the inside of the two walls that surround the unit with dynamat or something similar.

The other thing I was thinking was some sort of "soft start" modification which I understand is used for running on a generator. Does that also help with the noise level? Aside from the constant noise described above, the other jolting noise is when the compressor kicks back on. The initial couple of seconds is a little jarring when you're asleep.

Any thoughts or ideas appeciated!

 

Bob