Boiler water

Alan_6

Looking for a answer. I have been working on a boiler that is 7 years old. The system started out with glycol, because in this area, there use to be several power outages. Over the past 3 years, a few repairs were done, that required draining down the system. Now the system has just water, I turned off the water feeder, for a week, and did not see a pressure loss. The past 2 years, there is some kind of reaction, taking place in the base of the heat exchanger. It sounds like they do when, they are loaded up with sediment, and are flashing steam. My temp split is 18-20 degrees, limit is at 180 degrees, and the supply water is at 180 degrees. I even tried a larger pump, it lessened the noise. Is there any type of chemical that can be used in system that will disolve the sediment, that can be left in the system for a while.

hr

What type of boiler

cast iron or copper tube? Copper tube with the small efficient copper HX surfaces are very sensitive to any build up on the inside of the tubes. Usually a moaning "whale" sound is a first indicator. As it worsens a perculation like an old tea kettle.

Cast iron usually goes from just fine straight to the perc sounds, in my experience. Not a lot of warning like copper tubes.

There are several cleaners for hydronics. the soap type handle oil, grease, flux, etc. mostly on new systems.

If you have an old glycol build up or calcium from hard fill water you may need an acid cleaner. most of the chemical suppliers have such product. I like the Hercules Sizzle for de-liming. Rector Seal, Calganon (sp) Utility, many refrigeration supplies, etc will have a delime product on the shelves. Johnstone has them in their catalog.

A company in Denver handles a product that you put in and leave in. Lossens and keeps the minerals in suspension. I prefer to flush and use a good fill water, possibly DM water if the site water is real bad.

Use care when handling acids. Hand and eye protection,old clothes, possibly a respirator in confined spaces.

And don't spill it on the concrete!

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Alan_6

This is a cast iron boiler. I have replaced the heat exchangers, in the past, because the company that I work for, does not want to chance it with acid type chemicals. What is the name of the company in Denver, that has a leave in chemical? Thanks.

jerry scharf_2

check out Rhomar

www.rhomarwater.com. Their hydro-solv 9100 will clean things up. George Hunt from Rhomar hangs out on the wall. People much smarter than me swear by it.

jerry

hr

This product

has a chelate ingrediant said to keep the dissolved minerals in suspension. It is used with propylene glycoled systems. Not sure if it works well with plain water

I've had some contractors tell me it quiets down moaning copper boilers with propylene glycol in them (snowmelt boilers generally)

CST-50 closed system treatment

Chemicial Specialties Inc 303-675-0944

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