calcium buildup in boiler

Old 01-31-10, 09:38 PM
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calcium buildup in boiler

I have a raypak copper boiler installed 2 seasons ago. water supply has a lot of calcium and lime, everything plugs up. it recently started acting up, and I know its because the line in the heat exchanger has calcified no water is passing thru that tube where the temp probe is installed. last time I had to dis-assemle the boiler remove the heart exchanger and drill out that line to get water to flow thru it. Is there a chemical I could use, perhaps phosphoric, that might disolve the calcium so I dont have to go thru all that trouble? also once I get it cleaned out can you suggest an additive I might add to avoid this happening in the future? seems like this happens about every 2 seasons. its soo bad even my spirovent clogs and I cant get air out withut going around and bleeding all the basebords, usually for 2 weeks.
Old 02-01-10, 04:24 AM
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My fried you have a bigger problem than that. You have system leaks. These are sealed systems and the same water will stay in the system if it is not leaking. You should not add water for years. If you have this many issues you are adding too much make up water.
There are chemicals you can use but id you are doing this every couple years and are not getting down to the copper you heat transfer is low. You may never get down to copper even with a chemical. If you get it clean install a water softener and repair the system leaks.

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