Qty: Honeywell Home Replacement Powerhead (Mid Pos Valves) (847628) Trustpilot. Please read our Legal Disclaimer. If no bypass is fitted the boiler may kettle violently, with loud bumping and banging noises as the heat can’t be dissipated, and it may to go overheat lockout. The Honeywell motorised valves we see most commonly in the UK are the Honeywell V4043H zone valve (Honeywell 2 port valve) and the Honeywell V4073A mid-position valve (Honeywell 3 port valve). In our experience this has always been a very slow seepage at most. In smaller properties there is usually one programmer which has two channels. Green/yellow is Earth, blue is Neutral, brown is Live (or Line) to the motor, grey and orange are connected to the end switch and form part of a separate circuit. You donât need to take the cover screw all the way out. Is the V4073A 3-port mortised valve (22mm compression) suitable for vented & unvented systems? When using a 3-port valve, the control system may be known as a Sundial Y Plan system or a Honeywell Y Plan system.When using two 2-port valves, the control system may be known as a Sundial S Plan system or a Honeywell S Plan system.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). Water leaves by either port A or port B or by both at the same time. Please let us know if you like our Plumbing Basics and Tricks of the Trade videos. This is the state either when all the power is off or when Hot Water Only is selected. The spindle in Drayton 2-port valve bodies only turns through about 30Âº (this angle is about 5 minutes on a clock face). The motor can, if necessary, be removed without disconnecting the powerhead from the valve body. It sounds a bit counter-intuitive, but when a switch is closed it is completing the circuit and allowing current to pass; when the switch is opened it is opening a break in the circuit and stops current from passing. They send flow to either the hot water port or the heating port but not both, except briefly during switchover. screwfix are doing another 3 port valve on special offer. 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. One point to note, the auxiliary circuit (grey and orange wires) may be wired either way round. Crimps are metal tubes within plastic insulation, which are flattened using pliers to trap two wires, joining them electrically. 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. Trustpilot. These valves fail-safe in the open position in the event of a power failure or valve motor failure. On more recent valves, one wire is joined with a crimp and the other is wired directly to the electrical components of the valve. If you want a clear explanation of the internal electrical working, see John Wardâs YouTube video. We close a switch to make the circuit complete; when we turn on a light switch we are closing the switch. V4073A1039 is a 3 port, 22mm compression, 5-wire, mid-position diverter valveV4073A1088 is a 3 port, 28mm compression, 5-wire, mid-position diverter valveV4073A1054 is a 3 port, Â¾â BSP Female threaded, 5-wire, mid-position diverter valveV4073A1062 is a 3 port, 1â BSP Female threaded, 5-wire, mid-position diverter valve, V4043H1056 is a 2 port, 22mm compression, 5-wire, normally-closed zone valve with an auxiliary end switchV4043H1106 is a 2 port, 28mm compression, 6-wire, normally-closed zone valve with an auxiliary end switchV4043H1007 is a 2 port, Â¾â BSP Female threaded, 5-wire, normally-closed zone valve with an auxiliary end switchV4043H1080 is a 2 port, 1â BSP Female threaded, 6-wire, normally-closed zone valve with an auxiliary end switch, V4043C1156 is a 2 port, Â½â BSP Female threaded, 3-wire, normally-closed zone valve but has no end switchV4043B1257 is a 2 port, 22mm compression, normally-open zone valve, no manual lever, no end switchV4043B1265 is a 2 port, 28mm compression, normally-open zone valve, no manual lever, no end switch. After forcing it open, if you release the lever it will be pushed back towards the Auto end. Honeywell 3 Way Valve Wiring Diagramâ wiring diagram is a simplified enjoyable pictorial representation of an electrical circuit.It shows the components of the circuit as simplified shapes, and the capability and signal friends in the company of the devices. The Honeywell V4073A motorised valve rests in the hot water only position (the heating port, A, is closed) when the valve is de-energised. The rubber ball sits against the circular port (right side in photo), closing it off. The ones we use are made by Fluke. These 22mm valves (3-port V4073A1039 and 2-port V4043H1056) are used in smaller and medium sized properties. Why go to the trouble of draining the system down, changing the whole assembly, refilling, bleeding and having to add new inhibitor, when for a similar price you can just change the head/motor which is an easy half hour job. Trustpilot. The photos show how much insulation to remove. These are blue, green/yellow, white, grey and orange. It's a fully pumped system with a Y plan configuration using a Honeywell V4073A motorised mid postion valve. Using an auxiliary circuit and end switch is clever design for two reasons: If the valve motor fails, the motorised valve will not open. With very old Honeywell motorised valves the powerhead could not be removed without draining the water first. Operating the manual lever, the valve felt normal. Slide the blunt end of the motor sideways until the flange comes out from the tab holding it down. The plastic insulation may break, in which case the crimp is discarded. When we buy new Honeywell valves to put on stock we check that they are in the locked open "manual" position for storage. 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. After years of use, the O rings sealing the valve spindle (or actuator shaft) can fail. If it had opened the heating port (and the lever become loose for all, or nearly all, of the travel in the slot) we would have been looking for a fault elsewhere, either a fault with the central heating programmer or the room thermostat or with the wiring. Most two-port motorised valves carry an auxiliary switch which is used to send power to the boiler and pump when the valve is open. This system had 2 Honeywell V4043H two-port motorised zone valves, one controlling the radiator circuit and one controlling the hot water circuit. We tried in the past and, in our experience, they fail really quickly. The powerhead can only fit one way round onto the valve body but if space is tight that might not be obvious. If it does, the valve may work normally once the powerhead has been replaced. ACL Drayton motorised valves are very similar in operation, as are Iflo and British Gas valves which appear to be badged Drayton valves. Honeywell code VCZZ6000. Hi all, I have a problem with my system, the HW and CH seem to be on together, when the CH is on it also heats the HW. Five of these wires are the same as 22mm 2-port valve. 3 Port Valve insert repair kit. However, be warned! Y plan central heating system wiring diagram plumbersforums net hive and honeywell 3 port mid position valve how a works v4043 motorised 2 for full hd faults free installation instructions motorized zone does an s work 6 data taco controller manuals user manual manualzz boiler 4 wire 1985 sundial pack 7 day valves problems v8043e1012 1990 chevy blazer â¦ 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. As weâve said above, Honeywell make a large range of motorised valves. It may be easier to have the valve set in the manually open position using the manual lever. I think that a reading anywhere between 2.0kÎ© (2000 ohms) and 2.5kÎ© (2500 ohms) suggests that the motor windings are probably OK. Remove the motor securing screw which is located at the side of the Synchron motor. In small properties there may be no other motorised valves.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.System boilers may also have a diverter valve or zone valve built into them and might not have any external zone valves. As far a we know, Honeywell motorised valves which were made from 1985, and which carry the raised pip (small bump) on the top of the metal cover, allow the powerhead to be removed without draining down (see above). We received this email which raises a quite common fault on motorised valves: Recently called out to a 'S' plan heating system incorporating a Honeywell ST999 programmer and 2 V4043H motorised valves. Honeywell and Drayton motorised valve bodies do not. With the programmer set on hot water I cheched the ports A and B, they both getting hot at the same rate, suggesting valve position open for both ports. Flow from the boiler must be connected to port AB, the radiator circuit to port A and the hot water cylinder circuit to port B. These are all synchronous motors (synchronous is a generic term for a type of electric motor). In our photo that hole has black grease round it. If the actuator cover does not have a raised pip on the top (a reversed dimple), do not remove the actuator or you'll get a flood. They are fitted with a manual lever, running in a slot on one end of the valve. These two wires may be blue (in a Honeywell original Synchron motor) or orange (most replacement Synchron motors). Order online at Screwfix.com. Both motorised valves use the same Synchron valve motor. (Remember, the orange wire can also get 230V from the cylinder stat if it is calling and a hot water program is on.). The powerhead contains the motor, which is used to drive the valve open, and an auxiliary switch or end switch. The powerhead or actuator is the electrical section. © Free Heating Advice â updated 28/12/2020, Removing a Honeywell motorised valve powerhead, Honeywell valve motor fault? You set the valve into the manually open position by turning the power off, then pushing the lever towards the Man Open end of the slot. There is always an open pathway from port AB to port A or from port AB to port B or from port AB to both ports A and B at the same time. The dent prevents the ball from seating correctly for a while, allowing a small amount of let-by into the radiator system but this will often resolve itself after a few days. 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.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. We changed the failing zone valve with a new 22mm Honeywell V4043H zone valve and tested the operation. The motor will continue to be energised (though on lower power) and will remain warm. The powerhead drives a spindle (or actuator shaft) which is part of the valve body. As there is still a demand for Heating, the valve will motor to the Heating Only position (port A open; port B closed) and switch a 230V supply onto the orange wire, to power the boiler. So, if the lever is only loose for the first Â¼ of the slot, the valve is in the Hot Water Only position. View the Honeywell 3 Way Valve Manual for free. Honeywell use Synchron motors and these are freely available but there are lots of cheap cloned motors out there. 2, Will I have any problems with the wiring (not physically, but connecting 2 x 2 port valves to the 5 wires going to the boiler) 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. £111.01 each. This can be done with the plastic in place. The hot water zone valve on this customer's system was winding most of the way open but not quite far enough to close the end switch, so it could not fire the boiler. 22mm Honeywell V4043H1056 zone valve showing the "pip" on the top of the silver metal case and the manual lever at the bottom of the valve. If the lever is moved further to the right you can feel the strong resistance of the return spring as you force the valve open. With the valve largely open, hot water would heat up if the other Honeywell zone valve (the heating valve) was firing the boiler but not if hot water alone was selected on the programmer or if the room thermostat was up to temperature. In many cases, this white wire is not used and it must simply be made electrically safe (isolated so that it cannot touch any metal component). This prevents the boiler firing and the pump running when there is no water circuit open. Honeywell replacement motor for the V4043 series 3-port motorised valve. ex. Description: Electrical Installation pertaining to Honeywell 3 Port Valve Wiring Diagram, image size 800 X 718 px, and to view image details please click the image.. In this valve position, the lever is only slack in the slot for about a quarter of the slot travel (starting at the Auto end). Weâre happy for you to make individual copies of this article but please donât copy the whole article or parts of it onto your own website; link to the article instead. Unless the boiler thermostat is already up to temperature, the boiler will now fire. Most of the clones cost about half the cost of a genuine SYNCHRON motor. The lever then becomes slack for almost the entire travel of the slot.You should be able to feel a bit of spring resistance, right at the far end (Man Open end) of the slot.This can be difficult to feel for at first. With this design the ball tends to round itself up and avoid permanent dents. If the hot water valve is partially open, you may not run out of hot water. Repeatedly operating the manual lever for the full length of the slot may temporarily resolve this. When the valve is powered open the lever is loose for the entire travel of the slot. Old Satchwell Sunvic valve bodies used to turn through a full circle, as did Switchmaster Midi valve bodies. In the UK most domestic Honeywell zone valves are either 22mm compression (V4043H1056) or 28mm compression (V4043H1106) though they are also available as �" BSP Female (V4043H1007) and 1" BSP Female (V4043H1080). There is, however, more information the lever can give us if we know what weâre looking for. £90.83 each. These items facilitate repair of the valve without the need to drain the system or replace the complete valve. This valve will then not be able to tell the boiler to fire. The Honeywell V4043H1106 28mm 2-port zone valve has 6 wires. The Honeywell valves have a D-shaped top to the spindle but you can also use a spanner on this. If you know how to work safely with mains voltage electricity, the valve motor can be tested with a multimeter. There is no screw in this flange on the motor in a Honeywell valve. Eventually, the spindle may become so stiff that the valve motor cannot turn it at all. Both valves had auxiliary circuits and one of these was causing the boiler to run but we had to decide which. The only way to switch off the boiler is by isolating the programmer via the fused spur or by turning the thermostat on the boiler right down/off. You must feel for this; it does not turn full circle like some valves! We’ve written a longer, more comprehensive article about Honeywell motorised valves and their faults here. 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 circulating pump is usually connected to feed water from the boiler into port AB. The valve MUST NOT be fitted on the return pipework under any circumtances. The valve spindle did not feel unusual (tight) when we pushed the lever against the spring and the valve returned normally. Since the boiler worked OK for hot water we looked at the programmer to check that it was set to call for heating and checked that the room thermostat was set high enough to be calling for heat. If Hot Water is then satisfied (either by the programmer or cylinder stat), the grey wire is energised. This regular slight rotation evens out distortions in the ball. This white wire might not be used. This often happens during the Summer when no heating is called for. It may be possible to temporarily sort it out by freeing the spindle but it won't last indefinitely before it seizes up again. A programmer and room thermostat (stat) are used to control heating times and room air temperatures. Port A is normally connected to the radiator circuit and Port B to the cylinder coil (to heat hot water). If you click the link it will open in a new tab or new window so you access both articles. Customer reported radiators getting hot whenever hot water was selected and with no heating selected, Boiler stays on, permanent demand even when programmer is switched off. We use a small adjustable spanner across the flats on the valve spindle. Recent valves have an internal earth wire which connects the cover to the powerhead. Typically, a small or medium sized property will have either one 3-port valve (which splits the central heating water flow between cylinder and radiators) or two 2-port valves (one governing flow to the cylinder and one governing flow to the radiators). The programmer and room stat may be combined into a single programmable room stat.A programmer and cylinder thermostat (stat) are used to control the times when the hot water is heated and to control the maximum temperature of the stored hot water. It is now relatively unusual for the white wire (6th wire) of a Honeywell 2-port zone valve to be used. Starting with the controls set for Heating Only, hold the lever tight against the right side of the slot. The V4043 series of two port Motorised Valves has a wide range of flow control applications in domestic and light commercial central heating systems. On modern Honeywell valves, if the powerhead fails it can be removed from the valve body without draining down. You can then lift the lever slightly and release the pressure so that the spring pushes the lever back, leaving it caught behind the hook at the top of the slot. Left like this, the hot water would only be heated when a radiator demand was causing the boiler to fire and the pump to run. Using a multimeter set to 750V AC we checked for 230V between the valve white wire and valve blue wire (in the local junction box) and found 230V present so we suspected the valve motor. It will go to the radiators or to the cylinder coil, depending on which valve was opened. With the power off, release the powerhead cover retaining screw and lift away the metal cover. Neither valve remained in the permanently open position when the demand was switched off so the problem was most likely caused by an auxiliary switch welded in the connected (closed) position. Horstmann 3 Port Motorised Valve, 29 quid. The typical sequence with two-port zone valves works like this: The programmer is set for a hot water demand (hot water on) and sends a signal to the hot water cylinder thermostat. We switched off the power and the valve rested in the hot water only position. After isolating the electrical power we disconnected one lead from the motor within the valve actuator and checked the resistance through the motor across the two motor leads. However, if hot water was satisfied and heating was the last thing calling, the valve can remain partially energised with the heating port open. The inlet port AB can never be closed; the ball only moves between port A and port B. 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. A little piece of elegant design work by Honeywell! Itâs possible to download the document as PDF or print. The Honeywell V4073A is a spring-return valve. Honeywell 2-port valves have an end switch in the actuator (also called the power head) which closes (makes contact) when the valve is fully open. The cut end of this wire must have the insulation stripped back. If one motor wire is permanently fixed to the powerhead, you will need to cut it. If you disconnect these, water will flood out. 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. With the powerhead cover removed you also have access to the screw which retains the motor. The cooled circulating water is then returned to the boiler to be heated again. Once the cover has been lifted clear it can be hung to one side. The Honeywell motorised valves we see most commonly in the UK are the Honeywell V4043H zone valve (Honeywell 2 port valve) and the Honeywell V4073A mid-position valve (Honeywell 3 port valve). A full range of Motorised Valves from Honeywell suitable for all central heating systems. Move the valveâs manual lever to the manually open position. Radiators and hot water both worked normally in this house except that the customers could hear the circulating pump running occasionally in the night and the boiler would sometimes fire up, even though there was no demand from the programmer. These crimps can sometimes be re-opened by using pliers to squeeze together the edges of the flattened tube. The orange wire provides a Switched Live (Switched Line) feed to run the boiler and pump. In summer, of course, with no heating on, this fault on the hot water valve would show up very quickly because the heating valve would not be telling the boiler to fire. Boiler fired up when there was no demand from the programmer, sometimes in the middle of the night. On the other side of the motor there is another flange which is located below a metal tab. (Push it towards the MAN OPEN end of the slot and lift while releasing it, so it settles into the hook at the top of the slot.). 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