RIB current sensing relay on ECM circ

hot_rod

I bought this RIB from SupplyHouse.com, to see if it would work down on the low current draw of an ECM.

So when the pump boots up, starts spinning it makes a dry contact, by sensing the current. The line wrapped around the loop twice. This could fire a boiler, HP etc. Something to consider for TRV systems to wake up the boiler as flow starts moving. So no central t-stat needed to start the boiler.

It works on the 15-58 without any problem. It needed some adjusting to work on the Alpha ECM at low speed.

I tried the Phenix brand, an import knock-off, but it was fickle on the low ECM speeds. This one seems rock solid. I have it triggering a standard Caleffi ZVC t-stat connection, 24V.

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