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Controlling Variable Speed ECM Circulators Grundfos Alpha with AutoAdapt

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HYDRONICGUYEMCO
HYDRONICGUYEMCO Member Posts: 3
in THE MAIN WALL
If you use this type of circulating pump do you require a pump controller.

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  • Paul Pollets
    Paul Pollets Member Posts: 3,656
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    The pump usually wires into the boiler control or computer or a relay box.
  • hot_rod
    hot_rod Member Posts: 22,208
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    What type of system do you have zone valves, TRVs? Which model Alpha? Some models have a summer function which exercises them occasionally to prevent sticking over no use periods, so they need to be plugged in to a constant power source to use that function.

    https://www.youtube.com/watch?v=J_elAwebxcE
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream

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