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cloudd

mattmia2

does the system keep pressure if you turn off the makeup water supply?

usually a lot of makeup water is what kills boilers.

what does the ci circulator look like? a lot of makeup water would corrode that too.

it was not running glycol, correct?

a lot of chlorides in the water is hard on stainless steel but I wouldn't expect that to be a problem unless there is also a fair bit of makeup water but i suppose very high chlorides on their own could do it.

cloudd

Jamie Hall

Chlorides. Your municipal water people shuld be able to tell you what the chloride concentrations are in your water. And note you are interested in chlorIDE, not chlorINE. That's "ide" not "ine". There is a world of difference from the water chemistry standpoint.

hot_rod

maybe buy a ph and chloride test kit. It seems to be water related

I’d imagine there are water testing facilities up there. You need to tell them what the concerns are. Most often potable water is tested for health concerns, not corrosion

If it is high chloride fill it through an Axiom DM cartridge on the boiler side, but high chloride in potable water will still be a problem in the HX

GGross

I'm always a bit hesitant when I see boiler water in a closed loop run crystal clear. to me that says the system was taking on makeup water, and lots of it. just an observation. Prior to the failures was a fill valve left open to maintain pressure, or was the valve only ever operated manually?

Jamie Hall

A further thought. You don't mention a water softener. Are you using one?

mattmia2

or more specifically, did the system maintain pressure with the feed turned off before the boiler started leaking?

cloudd

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kcopp

What boiler is this? Seriously would be looking at using D Ion or Distilled water. What boiler was installed before this one? Did that have issues?

cloudd

mattmia2

i would suspect inadequate flow through the boiler or a bad run of heat excahngers. 2 ppm of chloride is well within most manufacturers' specs, they usually want under 50 ppm or 100 ppm.

kcopp

https://forum.heatinghelp.com/discussion/comment/1892874#Comment_1892874

Not waht I was refering to…

Before you installed this new boiler what was there?

Cast iron unit? Another modcon?

What boiler is giving you this trouble?

cloudd

109A_5

I would inspect the " -stainless steel manifold " and any other stainless steel parts in the system that touches the same water. If no degradation is found elsewhere I would suspect what @mattmia2 stated, inadequate flow through the boiler or a bad run of heat exchangers.

The thing is, if there is inadequate flow through the boiler it may short cycle or some other odd behavior.

cloudd

GGross

You never need to operate the heating zones in the summer months to circulate, no need to do this, it's strange that you thought to do this?. Can you take pictures of the near boiler piping? not selfie style, far enough back to see everything involved, model of boiler may also help as we have no idea what exact type of heat exchanger is in this thing. the super close up photo above looks different than what I am used to seeing

Larry Weingarten

Hi, I may have missed it, but what type of stainless is the heat exchanger made of?

Yours, Larry

cloudd

mattmia2

so it is a fire tube boiler and it is leaking between the tube sheet and the tubes? that really seems like a manufacturing defect.

GGross

https://forum.heatinghelp.com/discussion/comment/1893038#Comment_1893038

that model is more akin to a tankless water heater heat exchanger if im not mistaken. I agree probably defect though, leaking at a weld point

GGross

There are piping issues here for sure. But I'm not necessarily convinced that's the cause of failure. The flue is also very sketchy but again probably not the cause. are you getting intermittent ignition errors? does the relief valve on the space heating side blow off ever?

cloudd

I think using deionized water in the closed loop is probably the best solution to eliminate as many variables as possible.

Like I said this is a combiboiler both DHW and Closed Loop Radiant are using the same municipal water. As well, everyone in the subdivision around me is using it in their hot water heaters.

mattmia2

2021 was a tough year for manufacturing, we had vendors that wouldn't manufacture stuff because they couldn't get quality parts to use. it is probably manufacturing defects.

cloudd