AC flow

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Michel Jean

New Member
Aug 14, 2021
8
Boat Info
2000 Sundancer 270 no generator but with A/C
Engines
454 bravo 3
I got dancer 2000 270 no generator but the AC i use the AC at the dock 30amp she's freezing after 2-3 hours the unit is under the sink look like i got not much flow going out from the outlets the strainer is clean pump pumping good i dont know to much about that just bought it wwek ago thanks
A428F2DC-773F-48BB-952F-22F4A81CC36E.jpeg
 
Seems like you may have two issues.

If the unit is freezing up, meaning ice is forming on the unit under the sink - then you most likely have an air flow issue. Check to see if there is an air filter on one side of the unit. Check the AC vents making sure nothing is blocking them.

The low water flow on the side of the boat is another issue. Lines could be clogged with just about anything. Is/was the boat fresh water or salt water? Have you disconnected the pump to see how much water the pump puts out compared to what your seeing on the side of the boat? Would hate for you to try and clean lines if the pump is slow.
 
One other possibility is the unit is low on refrigerant. Depending on the unit, they can be serviced to the correct amount.
 
Water coming out of the pump with all kind pressure
 
Water coming out of the pump with all kind pressure and salt water
 
Michel Jean said:
Water coming out of the pump with all kind pressure and salt water
Click to expand...

Then the water flow restriction has to be in the hoses or the AC unit itself. As mentioned above, barnacle buster would be the best option - specially since your in salt. Other choices are to disconnect the water lines at the AC unit and try to flush the lines/unit with a garden hose and fittings. Given your situation though, I would still +1 on barnacle buster.
 
Alll good thanks i'll get back to you soon
 
I attach the garden hose on it same flow and couldn't find the air filter
 
Garden hose instead of pump, or did you disconnect hoses at AC unit and use garden hose there - pushing water towards the pump, and if you connect to the other hose, pushing water to the outside of the boat? And if your really good, pushing water through the AC unit itself? Each test should indicate where you might have issues with flow. If its just one section, you could get lucky and clean just that section. Otherwise need to clean the entire path.
 
Ok, story time. Installed a Cruisair unit in boat, different boat while back, middle of summer. Marina says be a couple weeks before they could install the thru hull for water pickup in hot august. So i hooked it up to the freshwater dock spigot. And ran the AC for 2 weeks. Boat was awesome cool, marina was pissed about the water bill. Oh well, they should have gotten to me sooner.
 
Pirate Lady said:
Ok, story time. Installed a Cruisair unit in boat, different boat while back, middle of summer. Marina says be a couple weeks before they could install the thru hull for water pickup in hot august. So i hooked it up to the freshwater dock spigot. And ran the AC for 2 weeks. Boat was awesome cool, marina was pissed about the water bill. Oh well, they should have gotten to me sooner.
Click to expand...

Common practice in several marinas. We have boats here that are plumbed that way, and the scumbags run their ac using dock water.
 
CaptRonn said:
Common practice in several marinas. We have boats here that are plumbed that way, and the scumbags run their ac using dock water.
Click to expand...

I have a spare fitting for my AC that uses dock water. Its the break-glass in case of emergency fitting - while I wait for the new pump to be delivered. Thought about ordering a spare pump - but I have so many spare parts - not sure if I’ll ever use them all. Figured this was a good half way alternative.
 
markrsimon said:
I have a spare fitting for my AC that uses dock water. Its the break-glass in case of emergency fitting - while I wait for the new pump to be delivered. Thought about ordering a spare pump - but I have so many spare parts - not sure if I’ll ever use them all. Figured this was a good half way alternative.
Click to expand...

Fine for that. But the jerks that are too lazy to maintain their AC and run thousands of gallons of city water through their AC, which the fellow residents of the dock ultimately pay for, are the scumbags.
 
CaptRonn said:
Fine for that. But the jerks that are too lazy to maintain their AC and run thousands of gallons of city water through their AC, which the fellow residents of the dock ultimately pay for, are the scumbags.
Click to expand...

Worked for a real estate company in downtown CLE for many years. Older building and they would use city water to cool the AC condensers within tenant space (same setup as marine AC). They sued the sewer department, stating that water in didnt equal water out due to evaporation along the sewer path. Sewer costs were based on water consumption. Granted when your talking about water to cool AC in a 50+ story building any little gain pays big. After many years they finally setup several roof top chillers.
 
Michel Jean said:
I attach the garden hose on it same flow and couldn't find the air filter
Click to expand...
You need to flush it with barnacle buster for 45 minutes then hook back up your pump and test. If you don't have a set of ac guages or a friend that does this is your first thing I would do.
 
I disconnect the hose from the ac start the pump all kind pressure and after the garden hose to the ac same flow with both
 
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