Onboard dehumidifier - SailNet Community
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post #1 of 2 Old 07-08-2016 Thread Starter
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Onboard dehumidifier

Came up in another thread.

My AC unit has three settings: Heat, Cool and Dehumidify.

The raw water pump does not circulate water, when in dehumidify mode. I only set it that way, when leaving for more than a day, so for all I know, it cycles on/off. However, I've noticed it's not pumping water, as I'm leaving and I can hear the air handler running.

I would have thought the dehumifier would also require heat exchange. Maybe they're defective.

Can anyone educate me?

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post #2 of 2 Old 07-09-2016
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Re: Onboard dehumidifier

In the dehumidifier mode the fan on the air side of the system would run continuously. The raw water pump/compressor should only cycle on whenever the humidity rises above the setpoint. In theory that's how it should work so that MAY explain why the raw water pump isn't energized. If you've had the AC on prior to leaving the boat the air is already dehumidified.

I remember on one of my powerboats the raw water pump ran continuously whether there was a load on the compressor or not so maybe it is defective. Time to break out the manual

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