Suprima 50 boiler; ACL 3 port valve; ACL lifestyle controller
Had to fit a new Synchron motor to the valve as and it now responds fine to initial calls again. The boiler fires up in response to CH calls and HW calls and drops off when CH call cancelled at the controller HOWEVER, when the boiler responds to a call for heat from CH (using the room thermostat), it fires up and stays on, even if the call from the stat and controller are cancelled. Boiler keeps going and driving up the heat!
BTW When this happens a HW call puts the MPV at W position and a manual shift of the valve to CH trips a switch push it all the way to CH position.
Is this a microswitch fault in the valve?
Had to fit a new Synchron motor to the valve as and it now responds fine to initial calls again. The boiler fires up in response to CH calls and HW calls and drops off when CH call cancelled at the controller HOWEVER, when the boiler responds to a call for heat from CH (using the room thermostat), it fires up and stays on, even if the call from the stat and controller are cancelled. Boiler keeps going and driving up the heat!
BTW When this happens a HW call puts the MPV at W position and a manual shift of the valve to CH trips a switch push it all the way to CH position.
Is this a microswitch fault in the valve?