Raypak heater mystery for the experts, this is beyond bizarre

robwas

In The Industry
Jul 20, 2019
23
New Jersey
We're totally baffled, this heater was spotless inside a week ago, took of the hood, vacuumed the leaves out, vacuumed around the burner tray, heater worked fine (only 2 years old to boot). Today I see a message, no pilot sensed so I open up the front and inside looks like a bunch of cobwebs and just strange stuff. Maybe some part of the heater caught fire and melted? The display still comes on, the wires don't seem melted but the inside is covered with this mess. Hoping someone with experience has perhaps seen this before and can shed some insight. We'll be taking it all apart soon, maybe that'll reveal the cause.
 

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Cool .. well, from a science project standpoint at least. Naphtha, the main component of mothballs, has a low vaporization temperature. So when the heater fired and burned the bag of mothballs, the naphtha quickly vaporized and then deposited itself on cooler areas. That’s the webbing you see.

It’s actually lucky how it turned out. Mothballs emit vapors that are highly combustible. This is why mothballs aren’t sold in a lot of areas and places that still allow them require package warnings. In a confined space like a garage where a gas water heater could be present, mothballs can actually create a combustible vapor pressure with air. Then the gas heater fires up and next thing you know you have a raging house fire.

I hope your friend bought you a beer for all the hard cleanup work he caused you!!
 
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