Snow Melt Boiler On Exterior

[mathew stouffer]

Usually the boilers around here are inside. I could not locate a manual for this unit, but I was curious if this PEX is a supply line for the system. Any ideas. Thanks

[Jim Robinson]

The ones I've seen weren't even connected to the water supply, since there was really no need for it. They ran a glycol/water mix through the system. I'm not sure what that red Pex is for. It's possible that it is connected to the water line as a way to refill the system? No sign of it anywhere else?

Were the control wires somewhere else? As in, not in the red pipe.

[David Bell]

From the looks of it the pex is being used as a sleeve for a temp sensor wire. Also not sure I would want that relief valve blowing glycol all over my foundation.

[mathew stouffer]

Thanks

[Terry Sandmeier]

That PEX or any PEX is not suitable for locations where it can be exposed by sunlight, you can see the deterioration starting. I agree with David that it is a sleeve for some type of wiring.