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Thread: need new ac pumps. suggestions?
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07-14-2019 10:35 PM #31
Re: need new ac pumps. suggestions?
1978 53' Motor Yacht "LADY KAY V"
Hull number 524
Chesapeake Bay
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07-16-2019 03:29 PM #32
Re: need new ac pumps. suggestions?
I have a newer convertible, but was having issues with the forward stateroom and the PS code. Turns out I had a leak in the strainer, then fixed that, everything worked great. Was getting the same code again a few weeks later, turns out the pump, then, had a leak. So, just replaced the whole unit/motor with the same Scot motor pump. I am having the old one rebuilt to have as an extra, as I seem to have issues with those in every boat I have had. Now that no leaks are present, not getting the code. So, water flow to the furthers unit from the pump is critical to avoid that code.
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Re: need new ac pumps. suggestions?
It may be too late for Shayne, but someone asked earlier in this thread about the GPM requirements for AC units.
I have a copy of the Crusair Installation and Operation manual for "DX Remote and Self-Contained A/C".
In that manual, on page 9 they say, "Required seawater flowrate is 4 gpm per ton
(12,000 Btu/hr) of total system capacity."
It also has some notes about seawater manifolds for multiple units.
If anyone wants a copy of the manual I have scanned it and can send it to them.
Nick1984 53' Extended Deckhouse
"Laissez Faire"
Delivered 1-1-86 (per Sam's)
Hull #CN737
Sausalito, CA
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07-16-2019 08:33 PM #34Registered Member
- Join Date
- May 2018
- Posts
- 31
Re: need new ac pumps. suggestions?
Looked in the generator room Sunday and found these two boxes on the bulkhead to the aft of the air units but when opened they didn’t appear to have triads in them. Will have to pull the diagrams I guess to track them down. Did find switches on top marked on and off. Tried all positions. Seems one of my pumps is working and the other is not. 6 total air units split three apiece.
West Wind
1989 67’ CMY Serial 311
Myrtle Beach, SC
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Re: need new ac pumps. suggestions?
Pascal
Miami, FL
1970 53 MY #325 Cummins 6CTAs
2014 26' gaff rigged sloop
2007 Sandbarhopper 13
12' Westphal Cat boat
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07-19-2019 11:29 AM #36Registered Member
- Join Date
- May 2018
- Posts
- 31
Re: need new ac pumps. suggestions?
Here are the pictures of the inside and top of the box Pascal requested. I suppose the 6 little circuit boards I see is the triads?
West Wind
1989 67’ CMY Serial 311
Myrtle Beach, SC
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07-19-2019 11:56 AM #37Registered Member
- Join Date
- May 2018
- Posts
- 31
Re: need new ac pumps. suggestions?
2 more pic's.
West Wind
1989 67’ CMY Serial 311
Myrtle Beach, SC
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07-24-2019 08:34 AM #38Registered Member
- Join Date
- Apr 2017
- Posts
- 45
Re: need new ac pumps. suggestions?
Hi everyone. I'm now cool in key largo! I wanted to thank everyone for their input. I have installed the new pumps and had them direct wired. The issues with the pumps shutting off went away once direct wired. I never figured out why that started to happen after I installed new pumps but direct wiring solved the problem. I really don't think all the triads failed since the pumps turned on for a bit. I was thinking that perhaps the person who wired them up initially wired them backwards so the wrong pump was operating and pumping water to units that were off. Anyway problem solved. I'm happy with these water pumps. 60gpm and quiet.
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07-28-2019 08:35 PM #39Registered Member
- Join Date
- May 2018
- Posts
- 31
Re: need new ac pumps. suggestions?
West Wind
1989 67’ CMY Serial 311
Myrtle Beach, SC
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Re: need new ac pumps. suggestions?
I have to say that I don’t see the point of bothering with triacs and relays in warm places like SoFl. With multiple units chances are there will always be at least one running and calling (or triac-ing) for raw water.
I ordered a relay box for my twin chillers but haven’t installed it... at least one chiller runs 80% of the time and with the 4, 5 or 6 remote condensers / splits found on most MY, there will always be one runningPascal
Miami, FL
1970 53 MY #325 Cummins 6CTAs
2014 26' gaff rigged sloop
2007 Sandbarhopper 13
12' Westphal Cat boat