fusion

  1. L

    Replacing thermostat connected to a ehc-Fusion boiler

    The boiler's circuit board is unlabelled, but based on the current configuration hope someone can help check my deductions/proposal... At the moment: Programmer/Timer (Sunvic Select 107XL) N/L connected to its own fused spur power supply. 1/COM is connected with a Brown/Live cable to the...
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