A geothermal heating system has been installed in my house. Previously I used a boiler with cast iron baseboard heat. In case I ever need to return to the boiler, what step should I take to insure that the boiler works in the future e.i. drain the boiler ?
I think that you are at the point of ''NO RETURN''.
I don't believe that I would drain a closed system boiler. If the innards of the system is exposed to air, the system has a greater chance to deteriorate due to oxidation than if it is filled with water. Obviously all heat, pilot etc will be shut off in the boiler itself. If you notice any moisture in the boiler the pilot should be fired to dry it out to avoid rusting. The flue pipe should be disconnected and plugged to keep out moisture and varmints. Even with all the previous, the system will not be salvageable when the geo system goes down. Good idea, but is it worth it? Probably not. Getting it up and running would probably be more than a geo fix and then what would you have?
