Many things in our homes can be controlled automatically, including of course the central heating system. This system has undergone many improvements in automation over the last few years. Sometimes, however these controls do go wrong. For example a motor driven valve. Battersea Plumbers can find, identify and rectify faults on valves.Change a valve:Before you change a valve, you should make sure that the one that you have purchased is the correct type. Take out the fuse or switch off MCB for the circuit from which the central heating controls are fed. The electrical cable from the valve will be wired to a junction box adjacent to the valve, or in the vicinity. This box will contain the main connections.Top tip: Always make a diagram of all connections to make re-connection easier.With the box cover removed, disconnect the wires. Then, remove the old valve by cutting through the pipe on each side. Bridge the gap with short sections of pipe, complete with joints on both ends. Spring the assembly into place and connect the joints to the old pipe, then tighten the valve cap nuts. Rewire and reinstate the power. A Battersea Plumber can fit all motorised valves.New Valve Motor.Once a motor driven valve becomes unserviceable, it is more than likely the motor that has failed or is intermittent in its operation which will cause system problems. Replacement is the answer as they cannot be repaired. It is not necessary to drain the system. Isolate the power supply to the central heating system completely, as these valves have a permanent live electrical feed. Remove the cover and check with a tester that it is dead. If it is, then, undo the single screw that secures the motor. Open the valve, and using the fitted manual lever, remove the motor. Cut off the connectors. Insert the correct type of new motor. Refit the retaining screw. Strip the new ends and connect the wires, using the new connectors. Replace the cover and test the operation of the valve by turning on the system.
