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| Joined: | Sat Nov 3rd, 2007 |
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The other day, I saw what I think is the FVIR part that goes out when flammable vapors get inside the tank (or around the tank). It is a glass vial in back of my burner and above what I'm assuming is Corderite. So I assume when vapors are sensed, this glass vial breaks? I really must do more research on these new hot water heaters. And I should take apart my old thermostat to see how it works since I haven't found a schematic for one.
My manual makes a statement about a "Combustion Shutoff Device," and replacing this seems separate from replacing the thermostat, and I'm assuming the TCO is in the thermostat, so I wonder if this glass vial is the Combustion Shutoff Device? And if so, replacing that doesn't look easy--it also seems to be full of a fluid, although I didn't get a good look at it when the plumber had the burner door off.
Well, the TCO failing (or not functioning properly) makes sense with regard to what's going on with my system, but on my water heater, the TCO seems to be what my manual is calling the "single use shut-off device," that once "opened," stays opened and must be replaced. This device is located on the thermostat (as is the "safety magnet"), so I'm hoping once the thermostat is replaced, all is well.
I really wish these new manuals came with schematics of all the parts to the system. That sure would help.
Sorry for all the text. Seems I must type to think.