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Honeywell V4043H 1056 2 Port Zone Valve Normally Closed 22mm

£9.9£99Clearance
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The Y Plan and S Plan names are more commonly used when other Honeywell controls are also used (programmer, room thermostat, cylinder thermostat and wiring centre). When Heating and Hot Water are both selected, the valve drives open to the mid-position and stays there. Hooking the valve to being permanently open will not damage anything - it simply prevents a spring from pulling the valve back to the closed position. It is used to allow independent temperature control of both the heating and the hot water circuit where the installation has pumped heating but gravity hot water. Replacing a failed Synchron motor in a Honeywell motorised valve is quite straightforward, assuming you know how to work with mains electricity safely.

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

This creates a living zone and a sleeping zone which both have separate time and temperature controls to improve energy efficiency. If it’s the other way round, and the 2-port valve controlling the hot water circuit is failing, it may be less obvious. With a potential free end switch for electrical control and quiet operation, it offers minimal power consumption. Statistics cookies or "performance cookies" are used to collect information on how the site is used. The powerhead can only fit one way round onto the valve body but if space is tight that might not be obvious.If you know how to work safely with mains voltage electricity, the valve motor can be tested with a multimeter. These two wires may be blue (in a Honeywell original Synchron motor) or orange (most replacement Synchron motors). When the valve is fully open, a microswitch is operated in the powerhead, connecting the grey wire to the orange wire. I have an old one here in the kitchen and it looks like if you manually move the lever to the manual/open position then the lever almost hits the mircoswitch.

Honeywell Home V4043H1106/U 2 Port Motorised Valve - Screwfix Honeywell Home V4043H1106/U 2 Port Motorised Valve - Screwfix

If, for example, the heating valve is failing in this way, you will get heat round the radiators while the cylinder hot water is being heated too. We also think that all the removable powerheads carried the “pip” (or raised bump) on the top of the powerhead metal case, but we are not certain of this. 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. Follow links through to various manufacturers sites, as each manufacturer will have its own terms and conditions for qualifying for longer warranties. When the cylinder is up to temperature, the hot water motorised valve closes and no longer tells the boiler to fire, so the heating now stops too.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. 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.

Honeywell Home 2 Port Motorised Zone Plumbing Heating Valve

As far as we know, the genuine SYNCHRON motors made for Honeywell have two blue wires whereas most genuine SYNCHRON motors have orange wires. Positioned where it cannot block any vent or cold feed when closed, this valve can be plumbed at any angle but the powerhead should not be below the horizontal level of the pipework. THIS ACCESSORY MUST BE FITTED BY A COMPETENT PERSON, AND INSTALLATION MUST COMPLY WITH THE GUIDANCE PROVIDED IN THE CURRENT EDITIONS OF BS7671 (IEE WIRING REGULATIONS) AND PART ‘P’ OF THE BUILDING REGULATIONS. I was not getting any voltage reading on pin 10 on the wiring for the boiler which I think is switched live for the boiler.It will make it easier when re-fitting it (just remember which end the flex was connected or take a picture on your phone).

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

The spindle in Drayton 2-port valve bodies only turns through about 30º (this angle is about 5 minutes on a clock face). 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. Honeywell V4073A1039 22mm 3-port mid-position motorised valve showing inlet port AB and outlet ports A and B. These valves have compression pipe connections, though Honeywell make motorised valves with threaded connections too. In normal operation, with a heat-only boiler, central heating water is heated in the boiler and then pumped round the system by a circulating pump.

The micro switch is not getting pressed for some reason, looks like some cavity insulation polysterene balls around this area I wonder if some have got in and blocked it. I get 240v from the blue from the valve but when I connect to the junction box its no longer getting 240v? Apart from the few moments when it is switching between ports, Port A and Port B are not open together. With the mains electrical supply turned off and isolated, the resistance across the two motor wires (either both blue or both orange) can be tested.

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