Constant Circulation and WM Indirect

Reynz_2

I have a WM Ultra 155, with a summer/winter switch.. I keep the BG 100 circulator running 24/7, which has been great... I recently had a WM indirect domestic water heater installed, and my home temp is too hot..



It is obvious that when the indirect circulator turns on to supply hot water to the indirect, there is heat being pulled into my BG 100 and my home is overheating... Although I don't want to do it, it seems i have only two options.. Wire the BG 100 to turn on with a call for heat, or have it turn off when there is a call for domestic hw.. Does anyone have any suggestions or ideas? I could use them...

Tim_Hodgson

How many pumps?

Do you have 2 or 3 pumps? A diagram of your piping would be helpful.

Or just install a motorized ball valve on the heating loop.



Good luck,

Tim

STEVEusaPA

Also, how it is being piped & controlled?

A pic or diagram of the boiler and near boiler piping would help.  By summer/winter switch, do you mean a triple aquastat control?

CMadatMe

DHW

Should be piped on the primary side and your system pump should be powered by the boiler so that it shuts off on a dhw call. You still can have constant circ just won't on a dhw call. Can you tell us more about the system?

gennady

outdoor reset

if this is right installation, system pump must stop when domestic hot water call comes in. heating works on outdoor reset, domestic hot water on fixed temperature. , so, primary and system pump must be off on domestic hot water call.

gennady

summer winter switch

regarding summer winter switch, your installer must activate and set warm weather shutdown function, and your boiler will work in auto without any winter summer switches