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Tekmar 256

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  • Tekmar 256

    Hi everyone, I am new to this forum.

    I have a Weil Mclain CGA boiler. Last year I installed two Taco electronic ball valves controlled by a Taco zone valve control.

    I purchased a Tekmar 256 odr control.

    I was reading the schematic and my question is

    Can i just wire the 256 in series with all the safety wiring, basically taking the lead off of the aquastat to terminal 5 and then from 6 back to the aquastat then power the 256 with a 24v power source at 8 and 9.

    I was under the impression that the 256 will do the aqua stats job for controlling the water temp. I still want to keep the aqua stat in series.

    Currently the t stat calls for heat and the zone valve opens which turns on the pump and fires the boiler.

    I just want the 256 to control the water temp.

    Any help will be greatly appreciated.