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Posted by Pete on October 23, 2006 at 19:02:14:
In Reply to: Re: boil out needed for brand new boiler? posted by HeatPro on October 22, 2006 at 22:42:18:
That sounds relatively easy. I have a seperate drain for the condensate (in the trap at the end of the return line) in addition to the one on the boiler so I think using that would work to drain the system without having to block it off. I also discovered there's a seperate tap for skimming that allows you to leave the safety valve in place.
I'll let you know if I have any trouble. Thanks again!
: : Thanks for the quick reply- a couple of follow up questions:
: : 1. If I've removed the safety valve and I'm draining it from there while heating the water, how do I make sure it doesn't get out of hand (and stop it when I'm done...)? Will water/oil only come out from the top when I add make-up water?
: +++ Yes.
: Do I need to lower the gas pressure to the boiler to keep it in check that way?
: +++ No, 100,000 btuh of input will only boil away 1 gallon of water in an hour.
: : 2. How would I go about blocking the return path?
: +++ the condensate connection is broken at the floor by the riser to the Hartford loop.
: Wouldn't it be adequate to simply open the condensate valve while running the system and run that over to a drain?
: +++ Depends on where the condensate drain is. You don't want to drain the boiler.
: Do I need to be adding a lot of make up water while doing this to keep it from running dry?
: +++ To repeat, it only requires a little more than a gallon an hour. Running 2 gallons per hour should be all that's needed.(a bucket full)
: : 3. Assuming that all goes well- do I need to add some preservative type chemicals in the water? I've heard of people putting antifreeze in boilers but that sounds dubious to me.
: +++ Remember that you have a steam boiler; every week you drain the boiler some and the sight glass, so you lose any chemicals. The boiler manufacturer usually recommends no chemicals. Some may recommend trisodium phosphate.
: Antifreeze is for sealed system water boilers.
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