I had the same thing happen with this hurricane. Overheat, boiled thru the pex on my outdoor econoburn. Luckily it wasn't underground tho. No dump zone. If its an outdoor boiler where do you put a dump zone?
I had the same thing happen with this hurricane. Overheat, boiled thru the pex on my outdoor econoburn. Luckily it wasn't underground tho. No dump zone. If its an outdoor boiler where do you put a dump zone?
What does the manufacturer recommend? I think any boiler manual I've read covers overheat protection in some way - think it would be a big liability if they didn't. One quick thought is to have a relief valve on the boiler and a fresh supply somewhere in the system that would let cool supply water in to make up for what gets blown out the relief valve. (But then if you have a water pump & your power goes out that might not work the best).
Which then makes me ask - did either of these cases have a relief valve in place? And did it blow off?
How about installing a Battery back up with pump where your outdoor lines come into the house. Once the fan stops on the boiler if you are moving water I would think it would help. You could also divert the water through a dump zone in the house with a normally open valve. Maintaining the battery backup would be the key.
gg
Gravity dump zones are pretty simple but there are basic requirements. You need some radiation that is above the boiler, and a normally open zone valve plumbed between the radiation & top of boiler. Wire the zone valve up (usually 24v, you might need a 110/24 transfromer if you don't already have one) - the power keeps it closed, when you lose power it opens & water circulates. I'm not sure how that would be done in an outdoor situation. Is your boiler in an enclosure or outbuilding, or is it right out in the wide open outdoors? If it is an outside boiler & is designed for that, the manufacturer should have something specd - my thoughts anyway.
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