Replacement Synchronous Motor for motorised valves ACL Honeywell Landis Gye Satchwell Sopec Tower DIY Replacement 2-Port 3-Port Valve Failure

Product Information

Apart from the few moments when it is switching between ports, Port A and Port B are not open together. If the powerhead (actuator) can be safely removed from the valve body (see warning above about pre-1985 Honeywell valves) you can try to turn the spindle. Once the cover is back in place, the power can be re-instated and the operation of the motorised valve can be tested. When using two 2-port valves, the control system may be known as a Sundial S Plan system or a Honeywell S Plan system.

If so check the voltage across the brown and blue valve wires with the heating/hot water on and the relevant thermostat turned up. Otherwise, if several zone valves were used without auxiliary circuits, and all were connected to the same pump so that the Live wire that opened each valve also fed the pump Live, there would be problems. The powerhead can only fit one way round onto the valve body but if space is tight that might not be obvious. A failed motor will prevent the motorised valve from opening but it is not the only cause of a valve failing to open correctly. Travis Perkins were selling BOSS brand genuine SYNCHRON motors in the past but their web page photo now shows what looks to me like a cloned motor.Where two 2-port motorised valves are fitted (one for the heating circuit and one for the hot water cylinder circuit) the fault may be disguised. Under Part L of the Building Regulations, many new properties must have the heating radiators (or underfloor heating) split into two zones.

When Heating and Hot Water are both selected, the valve drives open to the mid-position and stays there. Honeywell publish a Heating Controls Wiring Guide explaining how the controls should be wired in this case. I am happy with that because snow is forecast this weekend but I just want to know if this fee is considered OK as I may need to use them again. As soon as a Live signal went to one zone valve to open it and to run the pump, it would feed back to the Live wire on all the zone valves, causing them all to open. When all electrical power to the heating controls is switched off, the spring pulls the ball across to close port A, leaving port B open.Even though one valve only partly opens itself and is unable to fire the boiler, the valve on the other circuit can open fully and fire the boiler. Then, using a non-contact voltage tester like the Fluke volt stick above, check that the system is safely isolated. Only when both white and grey wires are energised (and the valve goes to the Heating Only position) can the orange wire get its 230V supply via the valve itself. It is most obvious when the valve has been in the Heating Only position and reverts to the mid-position.