Which boiler ports for adding a tankless heat exchanger to a Williamson GSA-200?

Jells · February 9

If I were to do this, which ports are the in and out to the coil added to for something like an Everhot? I'm getting a new install, and want to make possibly adding this in the future much easier by putting plugged tees in the appropriate ports. Seems like the condensate return and the drain D are the obvious candidates, but if there's one thing I've learned about steam, it's don't make assumptions! I would think the ports should optimally be further apart than these 2.

4GenPlumber · February 10

Just get a weil mclain eg 55. If you want to add a domestic loop, you can add the coil at that time. That way you avoid using "mud" and you separate the boiler water from the domestic.

4GenPlumber · February 10

Its the same boiler, just with the loop option (worth the money).

STEAM DOCTOR · February 10

The Williamson has two, 2 1/2" return tappings. Only the one on the left side, shows up in the literature. But the other one is certainly there. Using a WM, with the coil, is certainly simpler, and eliminates the need for an additional circulator.

STEAM DOCTOR · February 11

The WM is more expensive. But the external coil is expensive, plus the circulator and piping… But if you're looking to kick the can down the road, then the Williamson is not a bad idea. Just make sure to take out the plug at the time of installation. The longer it's in there, the harder it could be to get out.

Jells · February 11

https://forum.heatinghelp.com/discussion/comment/1887321#Comment_1887321

Which plug? Assuming the water would be pulled from a tee on the condensate return, would you have the coil return just drop from the top splashing into the boiling water? Somehow I thought that would be just wrong!

STEAM DOCTOR · February 11

Right hand, 2.5" return tapping

Which boiler ports for adding a tankless heat exchanger to a Williamson GSA-200?

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