Honeywell V4043H 1056 2 Port Zone Valve Normally Closed 22mm

Product Information

As this information is anonymised and aggregated it cannot be used to identify any individual user actions. That noise and that bump are diagnostic. They tell us that the valve has moved into the mid-position where both Heating and Hot Water ports are open. If you can make a Honeywell 3-port mid-position valve move into all three of those positions, the valve and controls appear to be wired correctly and the valve appears to be working normally. The Honeywell 22mm motorised 2 port zone valve has a wide range of flow control applications in domestic and light commercial central heating systems. V4043H (normally closed) models have end switches for electrical control of pump and/or boiler; the V4043B (normally open) model is particularly suited to control solid fuel systems, as it will always fail-safe in the event of a power failure. The raised bump or pip on the metal cover of the powerhead or actuator of a Honeywell motorised valve Removing a Honeywell motorised valve powerhead This can cause the valve spindle to seize. It often becomes stiff to turn at first and the valve may give intermittent problems. Eventually, the spindle may become so stiff that the valve motor cannot turn it at all.

Honeywell Home 2 Port Motorised Zone Plumbing Heating Valve

Both of these genuine SYNCHRON motors work in Honeywell motorised valves. The motors SYNCHRON make specifically for Honeywell come with two blue wires When Heating is also called for, the white wire is energised and the valve will motor to, and stop in, a mid-position. Power for the boiler is still supplied directly from the cylinder thermostat. The orange valve wire may have a potential of 230V but this is coming from the cylinder stat (to which the orange wire is also connected) and not from the circuitry of the valve. The commonest fault with Honeywell motorised valves is motor failure. Honeywell valve motor fault? Testing a Synchron valve motor 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. This is the relaxed state or de-energised state of the valve. It is also sometimes called the Normal state. When the programmer and stat send a Live feed to the 2-port motorised brown wire, the motor drives the valve open to allow water to pass. When the valve is fully open, the end switch closes, allowing electrical current to pass from the grey wire to the orange wire and from there to the boiler Switched Live. Unless the boiler thermostat is already up to temperature, the boiler will now fire.In medium sized or larger properties, using a combi boiler, there may be an additional zone valve external to the boiler which allows the heating to be split into two zones. If the powerhead was removed from the valve to make it easier to change the motor, it must now be re-attached to the valve. The power head cover can then be refitted and secured with the single screw. Make sure it sits squarely on the powerhead, with no wires pushing out from the sides. which leads me on to why I've posted this topic. When I put the hot water on, the boiler (a 10 year old baxi solo) will run for about 10 mins before the overheat light comes on, followed by banging in the pipes. I basically want to know whether the 2 port valve may be malfunctioning, causing this problem. I had a BG engineer in but all I got from him was "flush the system" so I want to do some detective work myself.

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The electronics in Honeywell motorised valves tend to be quite stable and show relatively few faults but the motor may fail after years of operation. Honeywell use Synchron motors and these are freely available but there are lots of cheap cloned motors out there. These look identical but, instead of the name SYNCHRON, they use the word Synchronous. Sometimes a powerhead is able to drive the valve only part way open but not far enough for the auxiliary circuit end switch to close. This valve will then not be able to tell the boiler to fire.

Specification

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. 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. The pump then pushes heated boiler water through both the open valve and the partially open valve. The other valve is the same the blue wire when connected to the junction box loses 240v not sure why but red herring i think. This can be difficult to feel for at first. It is most obvious when the valve has been in the Heating Only position and reverts to the mid-position.