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    Add timer programmer to external lighting with switch

    I have a switch in the hallway, which controls the outside lamps. I would like to install a programmer to switch the lights on/off at certain times, but i would also like to maintain control from the existing switch. is this possible? I can access the junction box between the switch and the...
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    Wiring centre for central heating & hot water

    I wonder if anyone can advise. I'm a bit perplexed by this one.... A few years ago I had a new central heating boiler installed. The system comprises of a boiler, with 2 external pumps for the heating (one for upstairs, one for downstairs) each with a 2-port valve and another external pump for...
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    Pump required on return from cylinder?

    a bit confused. I have a boiler, which sends heat out via 2 valves / 2 pumps - one upstairs, one downstairs. And also a hw send to the cylinder, a return from the cylinder with a pump on it. No valve one this one. Problem is when the cylinder reaches temp, demand is stopped and the boiler...
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