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end switch

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Ron Schroeder
Ron Schroeder Member Posts: 998
in THE MAIN WALL

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  • dave_92
    dave_92 Member Posts: 4
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    zone controll

    could some body please explain what A end switch on a zone conroll is does thanks.
  • Ron Schroeder
    Ron Schroeder Member Posts: 998
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    Most usually

    used to pull in TT on the boiler control
  • dave_92
    dave_92 Member Posts: 4
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    zone conroll

    tt?
  • Bill Nye_2
    Bill Nye_2 Member Posts: 538
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    End switch

    On a call for heat [a signal from the thermostat] the zone control, or zone valve "makes", this allows the zone valve to open or the circulator to start. When zone valve or other actuator "strokes open" the end switch "makes" and sends a signal to the burner TT terminals to start the burner.

    An end switch is usually a " dry contact switch" meaning no voltage from the control is applied. It is just a switch and you can control 24 volt or 120 volt or a DC volt circuit.

    So an end switch makes when something else happens first, like the zone valve opens or a relay closes.


    Make any sense or did I confuse you even more. I can take another run at it if need be.
    kipbrau
  • dave_92
    dave_92 Member Posts: 4
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    I think I got it its bascilly the last contact to open or close depending on the application I went to a class today on zone wiring too shy to ask when I didnt quite under stand. I have another question I will throw out there hopefully I will get a answer I understand... thanks.
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