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    Vaillant EcoTEC 837 Major Problem - Flooding

    Can anyone help? When trying to pressurise my vailllant ecotec plus 837 boiler the condensate trap just constantly floods!! Is the unit buggered!?
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    Connecting Heatmiser UH1 W to a Vaillant EcoTEC Plus 837

    Excellent, thanks for the help. So I just take the 230V out from the boiler terminal (3) to the (IN) on the wiring centre and wire the (OUT) on the wiring centre to terminal (4) on the boiler. Thanks again.
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    Connecting Heatmiser UH1 W to a Vaillant EcoTEC Plus 837

    Can anyone please help? I'm in the process of wiring a friends Heatmiser wiring centre to a new Vaillant EcoTEC plus 837 boiler and do not have the wiring diagram for the wiring centre. Could someone confirm if the boiler enable terminals on the unit are volt free contacts? If so I'm...
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