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Old 20-02-2012, 07:01   #1
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Dive Compressor on a Cruising Boat

I put a Bauer Junior II dive compressor aboard my new Zanshin and am very happy that I did, it has turned out to be a worthwhile addition which has increased the value of my time aboard immensely. I didn't learn to scuba dive until recently in the BVI and wish I'd done so sooner.

The dive compressor lets me fill my 2 tanks quickly (20 minutes from empty to 3200PSI) and now I'm independant of dive shops!

I also ended up getting an underwater housing for my camera and, in the past two weeks, have seen things (and brought back pictures) as I never was able to before.
For those interested, click on the thumbnail to get to my site's calendar, and each date with a thumbail of an underwater image contains the pictures for that site and that day.
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Old 20-02-2012, 07:22   #2
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Re: Dive compressor on a cruising boat

I think a compressor is a great idea, and definitely a part of my future cruising plans.

Yours is gasoline?
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Old 20-02-2012, 08:53   #3
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Re: Dive compressor on a cruising boat

Zanchin:

Where exactly did you put the compressor on the boat and how much space did it take up?

We are anxiously planning all of this for 2 years from now.

thank you.
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Old 20-02-2012, 09:41   #4
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Re: Dive compressor on a cruising boat

We're also thinking about one onboard. Inquiring minds need to know which model did you choose and why? What was the total cost? Who installed? What considerations did you make on the install location?

Enjoy the diving!!
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Old 20-02-2012, 10:48   #5
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Re: Dive compressor on a cruising boat

I have the Bauer and its great! weighs less than 100 pounds about 3 feet long x 14 in wide
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Old 20-02-2012, 10:56   #6
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Re: Dive compressor on a cruising boat

What is its starting wattage draw?
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Old 20-02-2012, 14:22   #7
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Re: Dive compressor on a cruising boat

Woud also be interested in size of your genset etc, re handling starting loads if electric.
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Old 20-02-2012, 14:24   #8
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Re: Dive compressor on a cruising boat

Mine is 5-6 hp Honda gas engine
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Old 21-02-2012, 14:24   #9
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Re: Dive Compressor on a Cruising Boat

Zanchin

I do too have a JuniorII that I plan on installing this year on our boat. We are preparing for retirement in 18 months.

I have two questions:

How in your instalation did you manage to deal with the drainage or purge product from the filter/dehumidifier from your compressor?

Finaly, I guess you dive mostly from your dinghy. If you dive as a couple/ buddy do you use mostly dive buoys and if so, how do you manage to leave your dinghy unattended while UW? Do you lock it to the buoys or simply take a chance leaving it unattended? What's the way to do it?

Thanks for info,

Michel
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Old 22-01-2013, 19:18   #10
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Re: Dive Compressor on a Cruising Boat

I know this is fairly old, but I thought I would toss in my $.02

For your condensate drains, just install nipples on the drain outlets of the filter and route tubing to a bottle. Make sure the bottle is vented or you end up with a "gunk bomb" that can blow up and spray all that drainage all over the compartment.
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Old 22-01-2013, 19:28   #11
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Re: Dive Compressor on a Cruising Boat

Glad you brought this up again. We're about to install a Bauer Jr on the boat and are concerned that the 5 KW genset may not be up to the task of running the compressor. The concern is the inrush current, which can be about 3x the normal operating load. So even if the 3 HP Bauer pulls only 12 amps running, the inrush may be nearly 40 amps which could bog down the generator.

Anyone care to share the size of their genset that's running their Bauer Jr?

Thanks- Matt
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Old 22-01-2013, 19:39   #12
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Re: Dive Compressor on a Cruising Boat

Quote:
Originally Posted by teneicm View Post
Glad you brought this up again. We're about to install a Bauer Jr on the boat and are concerned that the 5 KW genset may not be up to the task of running the compressor. The concern is the inrush current, which can be about 3x the normal operating load. So even if the 3 HP Bauer pulls only 12 amps running, the inrush may be nearly 40 amps which could bog down the generator.

Anyone care to share the size of their genset that's running their Bauer Jr?

Thanks- Matt
Having a Vitron Quattro (or similar) inverter charger with boost (Up to 4 KW) from your batteries would help with starting loads.

Is anyone doing it? Can also get soft start systems.

Marine Generator Test - Victron Energy
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Old 22-01-2013, 20:20   #13
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Re: Dive Compressor on a Cruising Boat

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Originally Posted by teneicm View Post
So even if the 3 HP Bauer pulls only 12 amps running, the inrush may be nearly 40 amps which could bog down the generator.
Hmmm ... don't know where that number came from. The amperage chart from my Bauer page shows 34 amps at 120 VAC and 17 amps at 230 VAC on that 3 hp motor.

As the compressor goes higher in pressure, the draw is higher so that 12 amp number you discussed may be for an unloaded system.
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Old 22-01-2013, 20:30   #14
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Re: Dive Compressor on a Cruising Boat

The 12 amp number was said to be the actual current load drawn by the 3HP motors at 230VAC (even though the documentation states 15-17 amps). This was the number given by the guys at the compressor repair shop here in FLL. And yes, this was for an unloaded system. They said to definitely start up the compressor at 0 psi...

So what size genset would you think would be needed?
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Old 22-01-2013, 20:39   #15
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Re: Dive Compressor on a Cruising Boat

My electrical guy says 7kw is a minimum for any of the small compressors (Bauer Jr II or Coltri MCH6). In the past, when we fudged the numbers, we got stuck with having to replace burned out start capacitors or motor starters.

If your compressor dealer in FLL says that you can go with your existing genset, GREAT!! That means you have someone to replace burned out electrical stuff when it happens.
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