Honeywell V4043H 1056 2 Port Zone Valve Normally Closed 22mm

Product Information

These valves have compression pipe connections, though Honeywell make motorised valves with threaded connections too. How motorised valves are used Replacement Honeywell SYNCHRON motors are available but are a bit more expensive. For a long time we’ve used the standard SYNCHRON motors as replacements, with very few problems.

Honeywell Motorised Valves | Central Heating | Screwfix Honeywell Motorised Valves | Central Heating | Screwfix

If it’s the other way round, and the 2-port valve controlling the hot water circuit is failing, it may be less obvious. The heating circuit valve may be open for long periods telling the boiler to fire. If the hot water valve is partially open, you may not run out of hot water.

The Honeywell valves have a D-shaped top to the spindle but you can also use a spanner on this. If you do this, you must use very little force as it is very easy to shear a spindle or damage the valve internally. 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.

Motorised Valves | Honeywell | Zone Valves | Toolstation Motorised Valves | Honeywell | Zone Valves | Toolstation

The auxiliary circuit (grey and orange wires) is commonly used to operate the boiler and/or the circulating pump. The auxiliary circuit could be set to work at a lower voltage than mains but it is normally carrying mains voltage. It works like this: One of the two wires, typically the grey, is connected to a permanent mains Live supply (about 230V AC in the UK). The other wire, usually the orange, is connected to the Switched Live feed to the boiler. The commonest fault with Honeywell motorised valves is motor failure. Honeywell valve motor fault? Testing a Synchron valve motor Honeywell say that the manual lever located on the end of the powerhead is not a position indicator and should be used used for filling the system and for draining down only. One of the wires from the powerhead must be connected (crimped) to one of the new motor wires. The other free wire from the powerhead must be connected to the other wire of the new motor. It doesn’t matter which of the two motor wires is connected to which of the two free powerhead wires as they are polarity free.On older style valves pre-1985, which do not have the replaceable head feature, the adaptor plate assembly can be used to upgrade the valves, to allow the replaceable powerhead to be used.” Both of these genuine SYNCHRON motors work in Honeywell motorised valves. The motors SYNCHRON make specifically for Honeywell come with two blue wires

Honeywell V4043H 1056 - 2 Port Motorised Zone Valve 22mm Honeywell V4043H 1056 - 2 Port Motorised Zone Valve 22mm

On modern Honeywell valves, if the powerhead fails it can be removed from the valve body without draining down. However,be warned!With very old Honeywell motorised valves the powerhead could not be removed without draining the water first. The blue wire is the Neutral, N. The green/yellow wire is the Earth wire, E. The white wire is connected to the wire from the room thermostat which calls for heating (radiators or underfloor). The grey wire is used to drive the valve to the Water Off position, in which only the heating port A is open; it closes port B. The orange wire provides a Switched Live (Switched Line) feed to run the boiler and pump. If the property uses a combi boiler (rather than a heat-only boiler) the boiler will usually contain a diverter valve. In small properties there may be no other motorised valves.

Details

It will make it easier when re-fitting it (just remember which end the flex was connected or take a picture on your phone). The powerhead can only fit one way round onto the valve body but if space is tight that might not be obvious.

Honeywell Home V4043H1056/U 2 Port Motorised Valve - Screwfix Honeywell Home V4043H1056/U 2 Port Motorised Valve - Screwfix

The Honeywell motorised valve faults detailed above are likely to apply to most domestic Honeywell valves. Much of what we describe also applies to ACL Drayton motorised valves like the Drayton 2-port ZA5/679-2 22mm zone valve and the Drayton 3-port MA1/679 22mm mid-position valve. Iflo motorised valves and British Gas motorised valves have similar faults. It may also apply to the Tower VAL222MV motorised valve, the Siemens CZV222 motorised valve and the Flomasta 27900SX motorised valve. Honeywell V4073A1039 22mm 3-port mid-position motorised valve showing inlet port AB and outlet ports A and B. This valve can be open to either port A or port B, or to both ports at the same time The V4043B valves are uncommon and likely to be found in solid fuel systems. These valves fail-safe in the open position in the event of a power failure or valve motor failure.A failed motor will prevent the motorised valve from opening but it is not the only cause of a valve failing to open correctly. After years of use, the O rings sealing the valve spindle (or actuator shaft) can fail. When this happens, central heating water will seep past and will corrode the metals. System boilers may also have a diverter valve or zone valve built into them and might not have any external zone valves. 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 banging occurs due to air in the pipes. If I goto the loft and bleed the top-most valve the banging will go away. I can then use the HW again but I end up having the same problem."