T&T: AC pumps

[Pascal Gademer]

a few years ago, i needed to replace the AC pump on my boat which feeds four 
16k units.

I called Cal Pump and they told be it was ok to use a Y and connect each 
pump to the Y. I figured i'd get better flow with two pumps since one 1200 
gph was not enough for four units.  I was skeptical about it but they 
assured me that it would work..

it did... for 2 months, then i fried one of the pump.  I believe that unless 
the pumps start exactly at the same time and start pumping at the same rate, 
one will starve the other. As much as liked the idea of having two pumps 
(for reliability), i went to a larger single pump.

pascal
miami,fl
70 hatteras 53MY
live helmcam @ www.sandbarhopper.com


----- Original Message ----- 
From: "Rich Gano" <richgano at gmail.com>
To: "Trawlers-and-Trawlering" <trawlers-and-trawlering at lists.samurai.com>; 
<David.Redburn at furman.edu>
Sent: Wednesday, February 13, 2008 10:04 AM
Subject: Re: T&T: AC pumps


> We have a few folks on the list who have more than one pump on a single
> intake and will be happy to tell you about their installation.  Of course,
> the intake diameter  and hose runs must be big enough and run properly to
> handle the flow required to cool both A/C units.
>
> I had some friends with a single-pump/dual A/C unit setup, but one unit 
> was
> forever tripping off the line.  I guessed it was because of a lack of
> sufficient cooling water, but it could have been another reason.  Anyway, 
> I
> opted for greater cooling water redundancy when we added another unit two
> years ago, because loss of such a single seawater pump would stop any
> summertime trip in our boat along the Gulf Coast.
>
> We happily cool ourselves with two 16K BTU A/Cs with completely redundant
> pumps attached to independent, dedicated intakes and outlets.  Adding the
> intake is simple enough, and since you say you have the outlet issue 
> solved,
> why not add the extra intake?  Against the cost of the second unit, it's 
> not
> so much.  if that's an issue, maybe you have a head intake you could tee 
> off
> from for the second pump's supply.
>
> Rich Gano
> CALYPSO (GB-42 #295)
> Southport, FL
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