Don't understand what you mean by the controller. Can you give more detail, or better still, a pic showing everything (relevant ) in the airing cupboard.Thanks, basically boiler is in the kitchen and controller upstairs in airing cupboard with hot water tank and original timer control.
So there are two timers in the airing cupboard?I mean the existing timer clock.
controller upstairs in airing cupboard with hot water tank and original timer control.
Then it will be easy to install. Your existing timer will control hot water times only; the HW temperatures are controlled by a thermostat on the side of the boiler. The receiver for the CM927 (that's the little box - the controller is the sender) will be wired into the junction box in place of the existing thermostat.No, boiler is downstairs in the kitchen. Upstairs in the airing cupboard is the HW tank and existing timer controller, just one time controller.
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