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Heat pump relay help ?

goldenboy1818

Hi guys after a bit of help please

We've been doing many heat pumps, samsung, Panasonic but our developer has now started to use Valiant.

Its a arotherm set up and a bit different in it asks for a relay to supply the 24 volt side from the underfloor heat enable output. It mentions a DPDT relay. Not too sure how to wire this and also how a DPDT relay works.

Could anyone please help, wiring diagrams online were not clear. I attached a picture of the wiring diagram I have. Thank you

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  •  I presume that is an extract of page 42 from here.
    If so it looks rather as if they expect the floor heating to have its own controls/ clock/ thermostat etc. that output "mains logic" voltage to operate the relay primary coil, while the Valient unit itself on connector S21 is just expecting contacts open/ close to turn the heat pump on. The relay, and as shown it could be single pole actually, is just doing the switch contact thing for you in response to the demand from the floor heating controls.

    You can verify this by temporarily wiring a light where the relay coil would go and a switch where the relay contact would go and pretending to be the relay.

    This is based on looking at the diagrams and a fair amount of assumption - I've not got the thing in front of me and that may not be your arrangement at all.

    I have seen quite a few heating controls where the control output exposes both sides of a floating contact, rather than making a wire live, and one of those would not really need the relay.
    Mike.

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  •  I presume that is an extract of page 42 from here.
    If so it looks rather as if they expect the floor heating to have its own controls/ clock/ thermostat etc. that output "mains logic" voltage to operate the relay primary coil, while the Valient unit itself on connector S21 is just expecting contacts open/ close to turn the heat pump on. The relay, and as shown it could be single pole actually, is just doing the switch contact thing for you in response to the demand from the floor heating controls.

    You can verify this by temporarily wiring a light where the relay coil would go and a switch where the relay contact would go and pretending to be the relay.

    This is based on looking at the diagrams and a fair amount of assumption - I've not got the thing in front of me and that may not be your arrangement at all.

    I have seen quite a few heating controls where the control output exposes both sides of a floating contact, rather than making a wire live, and one of those would not really need the relay.
    Mike.

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