Tekmar 306P to Tekmar 261

RIDIY

Sorry for noob question, but I am trying to add some heating zones to what was a multi stage single zone hydronic system. I am inserting a Tekmar 306P to run pumps for each zone but am failing on the connection between between the boiler output of the 306 and the boiler demand on the 261. I believe I just need to add a 24v transformer but can't figure out the wiring.

Any help would be appreciated.

STEVEusaPA

Yes you'll need a 24v transformer. One big series loop from transformer to 306 to 261 back to transformer. When any zone calls, the end switch is made, closes 9/10 on the 261 to fire the boiler.

RIDIY

STEVEusaPA said:

Yes you'll need a 24v transformer. One big series loop from transformer to 306 to 261 back to transformer. When any zone calls, the end switch is made, closes 9/10 on the 261 to fire the boiler.

Just to make sure I am understanding, The transformer is wired to both the 261 boiler demand (jack 1) and 306 boiler(jack x1) and the 261 boiler demand(jack 2) and 306 boiler(jack x2) are connected together?


Thanks for the help.

STEVEusaPA

I think like this?

RIDIY

Thanks again, worked like a charm once I swapped out the dead transformer...