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frgeorgeh 06-20-2015 04:13 PM

Air Conditioner question
 
I have three AC units on Ten Knots. The last couple of days have been really hot here in Ft Lauderdale and twice the compressor for the salon AC has cut off. If I let it sit 30 min or so it comes on and runs fine.

AC cools well and I have good water flow so, is it just getting too hot having to run 24/7 or is this an indication of an issue starting?

Capt.Bill11 06-20-2015 04:36 PM

Have the coils ever been acid flushed?

They should be able to run 24/7 if you have good power to them. And they are operating correctly.

frgeorgeh 06-20-2015 04:57 PM

My wife and I were just going over AC THEORY. Could be the evaporator coils are gunked up. Next would be to ck impeller but, as I said water flow is good.

We will disconnect inlet and return lines at AC. Then using a small bildge pump and Home Depot bucket we plan to circulate an acid solution through the unit for X hours.

Any recipes for the solution? Muratic acid seems to be the go to but I ha e no idea to what strength to dilute it. And, how long u think we ought to let her go?

Many thanks! Still learning a lot. And ya know. I don't get flustered anymore. We just sit down and try and figure things out. It's fun!

djmarchand 06-20-2015 05:07 PM

I would use one of the commercial products made for this purpose: Rydline, Barnacle Buster, CLR, etc. Dilute it in accordance with the directions, 1:1 i think. Muriatic is too strong an acid for laymen's use. Also the commercial stuff has detergents that will help remove an oil that may be bound up with the scale.

David

frgeorgeh 06-20-2015 05:13 PM

Quote:

Originally Posted by djmarchand (Post 342318)
I would use one of the commercial products made for this purpose: Rydline, Barnacle Buster, CLR, etc. Dilute it in accordance with the directions, 1:1 i think. Muriatic is too strong an acid for laymen's use. Also the commercial stuff has detergents that will help remove an oil that may be bound up with the scale.

David


Thank you David. CLR sounds like a good choice. We will save the muratic for the Electra sans!

FF 06-21-2015 05:40 AM

Could be the dock voltage gets so low , that another unit on the same power feed starts , and drops the voltage enouhj so yours cuts out.

They also run hotter with poor / low voltage and the unit might be shutting down as a safety feature?

Moonstruck 06-21-2015 06:54 AM

Could be icing on the evaporator coils. Hot humid weather can cause it, or low freon can also cause it. Reverse cycle units will go into a defrost cycle periodically. Then they will blow hot air for a few minutes.

psneeld 06-21-2015 07:04 AM

My new airs give pretty strict water temp limits for certain operations.....sounds weird and I haven't studied or tested them yet near extremes because of my location...what brand and year is yours?

Also I believe mine have a low voltage shutdown...any chance with the extreme heat in FL the power to the boat is getting low and the run to that ac unit is dropping it a tad more? Of course older and not all units have that feature.

Oooops....FF beat me to it....

Deckape 06-21-2015 11:42 AM

Are they going off on high pressure or is the compressor going off on its overload. What is causing the system to shut down will help you find and correct the problem.

Capt.Bill11 06-21-2015 01:58 PM

Quote:

Originally Posted by frgeorgeh (Post 342321)
Thank you David. CLR sounds like a good choice. We will save the muratic for the Electra sans!

Don't dilute the CLR. Or at least not by much. Barnacle Buster comes in two concentrations. One is ready to go out of the jug and the other you dilute 4 to 1 as I recall.

frgeorgeh 06-22-2015 02:02 PM

Got the 1-4 barnacle buster - ouch $72.00 a jug and a small bilge pump.

Cycled dilution through AC sysem 2 hours and then another 20 min of clean water. God the crud that came out.

AC running for over three hours and is cold. We will see how it goes and I will update.

Made a hell of a mess. Started pump with return hose on the carpet. Duh, what a dummy. I feel good though I did it all by myself!

frgeorgeh 06-22-2015 02:05 PM

1 Attachment(s)
This is what came out of the ACAttachment 41286

ranger42c 06-22-2015 03:44 PM

Quote:

Originally Posted by djmarchand (Post 342318)
I would use one of the commercial products made for this purpose: Rydline, Barnacle Buster, CLR, etc. Dilute it in accordance with the directions, 1:1 i think. Muriatic is too strong an acid for laymen's use. Also the commercial stuff has detergents that will help remove an oil that may be bound up with the scale.

David


That would be Rydlyme.

:)

-Chris

frgeorgeh 06-22-2015 05:20 PM

Quote:

Originally Posted by ranger42c (Post 342744)
That would be Rydlyme.

:)

-Chris


Never heard of Rydlyme but, I am a newbie. That Barnical buster worked well but I almost passed out when she rung it up.

But, $75 to do three ACs is cheaper than calling the man. I have got to keep that in mind.

SCOTTEDAVIS 06-22-2015 05:33 PM

FF has a good point, everyone running the AC's at the dock can and will cause a voltage drop that can cause the units to overheat and also cut out due to low voltage.

If cleaning them doesn't help put a multimeter in one of your outlets and check voltage if the boat gauge is not operating.

frgeorgeh 06-23-2015 02:41 PM

AC line voltage at this writing is 116.3. That is middle afternoon, 3 ACs running and outside temp over 90 deg F.

SCOTTEDAVIS 06-23-2015 03:57 PM

That is fine. Not a low volt problem. .......Just checked mine is 115.8

Deckape 06-23-2015 07:48 PM

Remember to do the flushing every 6 months if you are running in dirty water. Also shellfish will build up as they like moving water so a acid wash will do it. Here in the keys I put 1/2 of a chloride tab in my strainer every other month to kill the algae, shellfish growth . Don't forget the thru hull when cleaning the bottom.

frgeorgeh 06-23-2015 08:58 PM

Quote:

Originally Posted by Deckape (Post 343189)
Remember to do the flushing every 6 months if you are running in dirty water. Also shellfish will build up as they like moving water so a acid wash will do it. Here in the keys I put 1/2 of a chloride tab in my strainer every other month to kill the algae, shellfish growth . Don't forget the thru hull when cleaning the bottom.


Like a swimming pool tab? Great idea!

BlueYonder 06-23-2015 09:25 PM

Interesting reading before you use swimming pool tabs. Some can cause problems. Maybe bromide tablets would be better than chlorine?

Chlorine tablets or, How I nearly killed me (and maybe "us"))))


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