The central heating system has had many improvements in its automatic control features over the last 10-15 years, however whilst this automatic operation has made our lives a lot easier, sometimes a control can malfunction or even fail completely and when it does it needs to be fixed straight away. Barbican Plumbers can find, identify and rectify faults on heating systems. One example is a motorized valve. This unit comprises of a valve that is driven open and closed by an electrical motor.
*Top Tip: It is a good idea to make a sketch or photograph all connections and cable colours, to make re-fitting easier.
Remove and Re-fit a New Valve Complete:
Changing this type of valve is quite straightforward, however if you are not confident, and have no practical experience it is best to call a professional plumber. Note: Always make sure you have the exact replacement item before you start.
1). Find your consumer unit, and identify and remove the fuse or turn off the MCB (miniature circuit breaker) for the circuit that feeds the central heating system.
2). Drain the system down. Broadgate Plumbers can fit all motorised valves.
3). Electrical cables that go to the valve motor will be terminated in a junction box very close to the valve, or somewhere in the vicinity. Undo and remove the box cover. Now the terminal box cover is removed, and having tested there is no voltage present (240ac), you can go ahead and disconnect the cables. Remove the old valve, by undoing the cap nuts on the pipework either side of the valve. Now remove the old valve complete. Replace the new valve, making sure that the valve is sitting correctly and then tighten the valve cap nuts. Spring the assembly into place. Re-connect the electrical cables using your sketch or photo. Now replace the fuse or turn on the MCB. Check the valve for correct operation by running the heating system. Check for leaks.