DOMESTIC H.W. TANKLESS COIL CLEANING?

KEVIN CREAN

I NEED TO CLEAN THE LIME/SCALE FROM MY DOMESTIC H.W. TANKLESS COIL IN MY BOILER. I DO NOT WANT TO USE AN ACID BASE CLEANER. I HAVE HEARD OF PROCESS USING ULTRASONIC? OR ULTRASOUND? TO BREAKLOOSE ANY BUILD UP ON THE INNER WALL OF THE COIL. IF ANY ONE HAS INFOMATION OR RECCOMENDATIONS ON THIS PROCESS PLEASE ADVISE.

THANKS,

KEVIN C

Robert O'Connor_7

Tankless?

I clean coils through any close available tapping I can remove easily and is close to the coil and I made a little wand that can be bent so as to get into the small spaces and use water pressure to blast it clean...Robert O'Connor/NJ

ed wallace

coil cleaning

why clean it bye the time you pull it to clean it its cheaper to replace it and then you have a new coil

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Jim Burke comfort zone

Coil cleaning what a waste

First off why pay or try it yourself.
IT DOES NOT WORK ,YOU WILL BE BETTER OFF JUST TO REPLACE IT IF IT A CAST IRON BOILER.
Have seen so called coil cleaners ( hot water plus) and all they are doing is cleaning loose setiment in the coil not the real problem which is stuck to the piping. then they raise the limit to 200 degree and take yor hard earned money .
I would install an indirect h.w.h if the boiler is in good shape and be done with it .
Get smart and enjoy a nice hot shower.


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Big Ed

Ultrasonic

If you have a iron or mineral buildup , there are companys that use ultrasonic to break down the buildup. Look under "coil cleaning" in the yellow book. On Long Island we have alot of coils . You need to run the boiler at a higher temperature just to get enough hot water out of them. The high temperature draws the iron out of solution and coats the coil with mud. The mud acts like a insulation giving less hot water...

Nron_9

cleaning

some of the tankless reps say to clean them simply install valves to either sid of the coil and run a strong vinager solution through the unit for about 2 hours using about 5 gal of solution ,if this doesnt work then replace the coil and add a water softner to system before the water heater to keep mineral build up down

Dave Mayer -3 Sons Heating

Tankless cleaning

First off let me say that I agree a professional should be the ONLY one cleaning a coil. Second I agree tankless coils are a poor value, but they are out there and we will always have to service them. It would be great if we could just replace it or sell an indirect but that would be paradise.
I find that cutting both inlet and outlet pipes, draining all water in the coil, removing pressure from the boiler, turning the limits way up. The boiler will then become superheated and start "snapping" the coil. I introduce a small amount of vinegar and let that steam in the coil, then a flush with cold water, drain all the cold water out. I repeat this process until I do not get any deposits out. THIS IS A VERY TECHNICAL AND POTENTIALLY DANGEROUS ACT. But on a lighter note, I have done this for over 10 years and have 100% success. Always replace the mixing valve element and re-pipe the mixing harness if needed.
Dave Mayer Sr.

Big Ed

Caution

Dave I use to steam out coils until one hammered on me, it twisted and blocked the coil. Another time the steam whipped the attached washing machine hose accrossed the leg of my pants. Gave one nasty burn.. As you said dangerous...

Not knocking your technique just hate to see a fellow tech in the same position..."Gee lady did you know your coil is broken?" :O

John@Reliable_9

Money down the drain!

I used to clean them. We stopped for one reason, it only will last for about (1) year if your lucky. I consider a tankless coil a "wear item" needs to be replaced about every 10 to 12 years for good hot water production. The money spended on "cleaning" could be aleast 1/2 the cost of a new one. Hope this helps John@Reliable

Ken D.

Coil

I have heard of an Ultrsonic method, but have not used it myself. We used to clean coils with an acid solution for years,but now replace the coil exclusively. The repair lasts much longer and you don't run the risk of burning holes in the coil if the acid is too strong or the coil is too old. If the coil was acid flushed previously- which is possible- chances are it will go into holes. I believe it is more cost effective to replace.

Weezbo

Forget it .

new coil.. or could we interest you in a nice Hot water maker? thats the words you ultimately need to hear. flushing them with acid wash etc is a losing battel at best.hot tank it? take it out drag it down to the local radiator shop waste your time or take it out buy a new one and stuff it back in...on residential boilers they are reasonably priced probably around 125$+/- a few .