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Old 09-14-2018, 12:45 AM   #1
Join Date: Sep 2017
Location: Kingston MA
Posts: 14
Default dd on air conditioning

My mechanic says he can find a clean, used, generic not Maxum air conditioning unit that installs under the first step down the companionway on a 3200 SCR.

Any blueprints, schematics, advice, general knowledge of whether the boat has ducting pre-installed. I see a register or return up on the forward berth.

I am very familiar with the air handler and compressor on every system except marine. Anyone care to explain how the system works?

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Old 09-14-2018, 02:32 AM   #2
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Join Date: Feb 2012
Location: Essex, Maryland
Posts: 7,776

Marine air conditioner units are all in one units. The return is typically just a grill to the cavity that the A/C unit is in and there are ducts for the supply. The condenser is a liquid heat exchanger what uses sea water to carry the heat away. The sea water is provided by a seacock and 12V pump to pump water through the HE then it exits the boat through a above water thru hull fitting.

1997 2400 SCR
5.7 Vortec / Bravo 2
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Old 09-14-2018, 01:25 PM   #3

Join Date: Apr 2008
Posts: 4,722

Maxum didn't make the air conditioner. They typically installed Marine Air Systems (Dometic). If the vents are in place, I assume they pre-ran the duct work as well. I had a acquintance with a 1996 3200 and his AC was under the stairs. There were return vents on the first and second riser.
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