Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

domestic hw coil

pj_2
pj_2 Member Posts: 10
Travis
did ja get my e mail
maybe we can use them for back up coils
we ordered new ones
vinager
we try'd acid didn't get thru
but hey we're will'en to try anything at this point
thanks
pj

Comments

  • pj_2
    pj_2 Member Posts: 10
    I'm stumped on this one

    Did anyone ever hear of a domestic coil blocking up in 3 weeks. We have a customer who's dhwc pluged up with ???
    salt from the water softner, maybe ??? Or somthing flushed in from the water main. There are 2 coils w/ 1-1/2"cw in & out, installed by the mfg about 3 weeks ago. They are in a Viking steam boiler. supplying steam and hw to a large banquet facility. Undid the unions on cw side pleanty of water nothing on the hw side, anybody ever experience anyhting like this. Really strange!!!! 3 weeks Any help would be appreciated. We're going to acid wash tomorrow and probably monday, they're pretty big coils. Also who would have muriadic acid on sunday?
  • Mike Reavis_2
    Mike Reavis_2 Member Posts: 307
    This sounds like an unusual failure.

    The home centers may have muriatic in the paint department

    Mike
  • hr
    hr Member Posts: 6,106
    Ya know what

    Years ago when I worked with mt dad, as a wee lad, I remember..... Somehow a water softner allowed all those beads Zeolite, I think they are called, to wash out and into the plumbing system.

    May just as well have been concrete! It took a long time with water and high pressure air to flush that system clean.

    Is your softner resin tank very light all of a sudden? I hope not :)

    Not sure I would go on an acid trip, until you determine what you have going on. Acid caused strange things to happen when misused!

    hot rod

    To Learn More About This Contractor, Click Here to Visit Their Ad in "Find A Contractor"
  • pj_2
    pj_2 Member Posts: 10


    thanks mike
    h.d not my favorite place has it.

    hot rod
    this may be the case it's the only thing the mfg guy's and I can think of. we'll find out tomorrow, but I gotta wash it, can't shut'em down all kinds a things going on.
    but hey 3 weeks , new coil,

    oh well We're getting paid

    thanks
    pj
  • Art Pittaway
    Art Pittaway Member Posts: 230
    Maybe a good place for

    a Filter. I know it's commercial, so it's going to be a big flow rate but even a gang of three(?) "whole house units" would strain the junk before the coil. Unlike computers, garbage in doesn't mean garbage out.
  • Al Letellier
    Al Letellier Member Posts: 781
    plugged coil

    Have the water tested after the filtration system.the heat from the boiler may be driving something out of the water and plugging the coil. Had it happen on a smaller scale in a residential boiler. The treatment guys said salt would flush it out and we used 5 Lbs of table salt in five gallons of hot water and pumped it through the coil and voila!! you have to know what you're dealilng with befoe attacking it. Be very careful with that acid....remember, someone will injest the water that comes through that coil after you're done. FLUSH>>>FLUSH>>>>>FLUSH and then test it before you put it back in service!!!!

    To Learn More About This Contractor, Click Here to Visit Their Ad in "Find A Contractor"
  • Jack_23
    Jack_23 Member Posts: 153
    Ashrae \"Fundamentals\"

    Was looking thru an older copy the other day and found a graph which showed how much lime would precipitate our of water at various temps. 120F water had only a very short rise in precipitant but as the temp got up to 180 it was major poundage. Get your water analysis done for the supply water and also for the softened water. If it is city water you can get it from the water dept. Good luck tomorrow!
  • Travis G.
    Travis G. Member Posts: 22
    white viniger

    White viniger is the best thing I have ever used on flushing coils. Get the boiler real hot then pump in the wite viniger into the coil and out into a bucket and keep it cyceling through for about twenty minutes.
  • pj_2
    pj_2 Member Posts: 10
    attempted flush w/ muriatic acid

    Wow these coils are plugged solid.
    We did get some purple looking stuff , I suspect its rosin if my memory serves me , the softner has rosin in it and its redish brown color we did not get thru either coil yet.
    Letting the acid set in the coils overnite. In the mean time got hold of the mfg and they're going to make a new set of coils.

    Hey Jack that was interesting this water temp is 200 + and the mfg's guy said the last coil was blocked solid w/ a white cement. Heh watd'ya think calcium carbonate or lime.
    Yeh we'll have the water tested and yes it's city water, er a little water co.

    This is a pain in the a, told the owner we need to put in big **** direct fired comm. gas water heaters . he agreed "cha ching $$$$$$$$$$ god I love it when they listen.
    thanks guys
    pj
  • JackFre
    JackFre Member Posts: 225
    Send me your fax #

    and I'll send you a copy of this page. What exactly is the use for this high temp water, if you don't mind my asking?
This discussion has been closed.