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. We’d then change the powerhead or, if the valve spindle seems tight, change the complete valve. When the valve is closed, this lever is "loose" for about one third of the travel of the slot with the rest of the travel pushing against a heavy spring. We replaced the failed British Gas BGMVSP-2 two-port valve with a Honeywell V4043H 1056 motorised valve and the problem was resolved. Environment Describes the situation the problem occurs or the environment that the question applies to, including products affected Nearly all Honeywell valves have a powerhead (also called an actuator) which can be separated from the valve body. 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. The motor will continue to be energised (though on lower power) and will remain warm. Synchron valve motors can remain energised and hot for many hours a day, all through the winter. V4044C motorised valves are 3 port diverter valves. Both motorised valves use the same Synchron valve motor. The Honeywell motorised valve faults detailed above are likely to apply to most domestic Honeywell valves. In our experience this has always been a very slow seepage at most. However, be warned! 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). Both these valves are much rarer but it's important to replace with the correct valve. This can cause the valve spindle to seize. Slide the blunt end of the motor sideways until the flange comes out from the tab holding it down. 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. With the auxiliary circuit disconnected, the valve would still open on a demand from the programmer and cylinder thermostat but would not fire the boiler. We find it is normally about 2.1kΩ (2100 ohms) if the motor is cold and up to 2.4kΩ (2400 ohms) if the motor is quite warm. The Normal state of a valve is the de-energised state. Remove the motor securing screw which is located at the side of the Synchron motor. So, if the lever is only loose for the first Â¼ of the slot, the valve is in the Hot Water Only position. It should also have left you with two wires still connected to the powerhead. There is no screw in this flange on the motor in a Honeywell valve. The boiler will not fire (with no open pipe circuit to dissipate the heat), unless another motorised valve opens another pipe circuit and calls the boiler into action. The valve will remain in the Heating Only position (port A open; port B closed). VAT £119.08. This regular slight rotation evens out distortions in the ball. 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. 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. The circulating pump is usually connected to feed water from the boiler into port AB. Whereas the internal electrics of the 2-port valve are quite simple, the internal electrical controls of the V4073A mid-position valve are more complex. This can be a bit of a fiddle. Manual lever for draining/filling. If the valve spindle seizes up with the valve open, the switch remains permanently closed. You must also isolate the electrical supply before removing a Honeywell motorised valve powerhead. If the white wire is not used, the 28mm zone valve is wired in the same way as the 5-wire 22mm zone valve, and operates in the same way. However, if hot water was satisfied and heating was the last thing calling, the valve can remain partially energised with the heating port open. 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. 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. I was getting lots of bubbling noises when the hot water fired up. Once the cover has been lifted clear it can be hung to one side. 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). It is also sometimes called the Normal state. After forcing it open, if you release the lever it will be pushed back towards the Auto end. Honeywell 3 Way Valve Wiring Diagram– 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. When the valve is fully open, a microswitch is operated in the powerhead, connecting the grey wire to the orange wire. It is now relatively unusual for the white wire (6th wire) of a Honeywell 2-port zone valve to be used. A failed motor will prevent the motorised valve from opening but it is not the only cause of a valve failing to open correctly. The lever will be slack across the whole length of the slot with no end resistance at all. They send flow to either the hot water port or the heating port but not both, except briefly during switchover. 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. However, only Synchron have the right to call their synchronous motors “SYNCHRON”. The manufacturing date code is written on the side of this motor, 9823, week 23 in 1998. 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). Testing a Synchron valve motor, Honeywell motorised valves electrical operation, Honeywell 22mm zone valve operation (V4043H1056), Honeywell 28mm zone valve operation (V4043H1106), Honeywell 3-port mid-position valve operation (V4073A1039 and V4073A1088), Honeywell 3-port mid-position valve operation (V4073A1039 and V4073A1088). Operating the manual lever, the valve felt normal. Bends or elbows in the pipe work in very close proximity to the valve. The grey wire is (normally) permanently Live. There are a full range of spares available for the V4073A valve that include the motor, the complete powerhead and the ball and plate kit. This honeywell insert is a means of repairing 3 port valves when they are passing from the hot water side to the heating. Typically the grey is Permanent Live and the orange is Switched Live feed to the boiler and pump but you will occasionally find that the grey and orange have been reversed with the orange as the permanent Live and the grey as the switched live feed to the boiler and pump. When the valve is open, the lever should be free across the whole of the slot. (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.). The rubber ball in the Honeywell valves can become dented if left in the hot water only position for a long period. 3 Port 28mm Mid Position Motorised Valve ... CMV322 3 Port Mid Position Valve 22mm (250951) Trustpilot. This white wire might not be used. This often happens during the Summer when no heating is called for. Five of these wires are the same as 22mm 2-port 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. The other free wire from the powerhead must be connected to the other wire of the new motor. qty. This prevents the boiler firing and the pump running when there is no water circuit open. Honeywell and Drayton motorised valve bodies only turn through a limited arc and you must “feel” for the points at which the movement stops. We tried in the past and, in our experience, they fail really quickly. They don’t usually come right out of the steel plate but are retained by it as the powerhead is lifted away from the valve body. There are lots of poor quality synchronous motors out there. The Honeywell �" BSP Female zone valve (V4043C1156) does not have an auxiliary switch. The auxiliary circuit allows several 2-port motorised valves to be used to control separate zones without interacting electrically. 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). This figure is normally about 2400 ohms but in this case the leads were open circuit, with a resistance reading millions of ohms, indicating a break in the motor windings. If the same fault repeats, it suggests that the gearing in the powerhead may be worn. 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. ex. The explanation that follows assumes the valve is connected to the pipework in that way. If the contacts are welded together, the auxiliary switch will permanently send a signal to the boiler and pump causing them to run, even when the motorised valve is closed. 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. 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. A failed Synchron valve motor will prevent a 2-port motorised valve from working. 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. These 22mm valves (3-port V4073A1039 and 2-port V4043H1056) are used in smaller and medium sized properties. Remember, on early Honeywell motorised valves (pre-1985) you can’t remove the powerhead without draining down first! These valves fail-safe in the open position in the event of a power failure or valve motor failure. The heated water can either be sent to the radiators (or underfloor heating) or to the cylinder coil to heat the domestic hot tap water. This valve will then not be able to tell the boiler to fire. Share the user manual or guide on Facebook, Twitter or Google+. Other similar valves are the Siemens CZV222 two-port, 5 wire valve and the Flomasta 27900SX two-port valve. The problem the customer has is that boiler will not turn off. 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). If there are then ‘street' elbows or closely fitted elbows used on either the A or B port then ‘turbulence' is likely around the area of the valve. With hot water selected on the programmer, and the cylinder thermostat calling for heat, we checked the lever and it was loose across the whole travel of the slot but the boiler didn't fire. The powerhead contains the motor, which is used to drive the valve open, and an auxiliary switch or end switch. When a V4073A mid-position valve is set up in a Y-Plan configuration and Hot Water is called for, power to the boiler is provided directly from the cylinder thermostat. They may eventually fail. If the valve is stuck fully open this auxiliary switch will be permanently closed (permanently connected) and the boiler and pump will continuously receive a signal to make them run. 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). If central heating was selected too, and the room thermostat turned up so that the radiators came on, the hot water would heat up. View the Honeywell 3 Way Valve Manual for free. The valve does not pull the lever over towards the open end as the valve opens. This ball was either permanently damaged or the seating was damaged or contaminated so we changed the complete valve, both the power head (actuator) and the body and the problem resolved, hot water cylinder warming up normally with no unwanted hot radiators. The valve will not then close the end switch and so will not complete the auxiliary circuit. Boiler fired up when there was no demand from the programmer, sometimes in the middle of the night. With the power off, release the powerhead cover retaining screw and lift away the metal cover. The same thing can occasionally happen if the end switch arcs, welding the contacts together. Each. First, isolate all electrical power from the central heating system controls. 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. The Honeywell valves have a D-shaped top to the spindle but you can also use a spanner on this. Most Synchron motors have orange wires. The grey and orange wires remain permanently connected and there is a permanent demand sent to the boiler (and pump). Water leaves by either port A or port B or by both at the same time. My central heating has a problem with the 3 port diverter valve. For a long time we’ve used the standard SYNCHRON motors as replacements, with very few problems. The other/same(?) Hi all I have a Honeywell 3 port valve and had the heating engineers out as the heating was not working, but the hot water was fine. If the hot water valve is partially open, you may not run out of hot water. If the valve is closed, the lever will be slack for up to about â…“ of the travel of the slot. The Honeywell V4043H1106 28mm 2-port zone valve has 6 wires. There were two motorised valves fitted to the system we were looking at,  a Tower VAL222MV two-port valve controlling the radiator circuit and a blue British Gas BGMVSP-2 two-port valve controlling the hot water circuit. 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. Where additional zone valves are used there will usually be another programmer or timer. 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. 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. 3 Port 22mm or 28mm Motorised Zone Valve Head Can Replace Honeywell V4073A1039 V4073A1054 V4073A1088 V4073A1062 4.3 out of 5 stars 218 #1 Best Seller in Bathtub & Shower Diverter Valves 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 … You may need to turn the cylinder stat up to make it call. ACL Drayton motors seem to still be genuine SYNCHRON and let’s hope it stays that way. You must isolate the electrical power before removing the powerhead. The brown wire drives the heating valve open when there is a demand from the programmer and room stat (or cylinder stat with the hot water valve). Im getting ~240V AC … Typically, in this position, the lever is loose in the slot for about one-third of its travel, with the remaining two-thirds of the travel pushing against a heavy spring. It is not uncommon to find the pump fitted directly adjacent to the AB port of the mid position valve. Everything worked normally with the hot water now operating correctly on its own again. Can be replaced without draining down. If the property uses a combi boiler (rather than a heat-only boiler) the boiler will usually contain a diverter valve. Temporarily freeing the spindle may make water seep past the O ring seals. Eventually, the spindle may become so stiff that the valve motor cannot turn it at all. Nibe Part code 624888 The motor must then be wriggled back into place so that one of the motor flanges slides back below the angled metal tab on the powerhead. 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.. 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. The valve is not energised. The plastic insulation may break, in which case the crimp is discarded. This system had 2 Honeywell V4043H two-port motorised zone valves, one controlling the radiator circuit and one controlling the hot water circuit. Crimps are metal tubes within plastic insulation, which are flattened using pliers to trap two wires, joining them electrically. The lever pushes the valve open against the return spring. Installation Instructions. You may need a tool unless you have strong fingers. screwfix are doing another 3 port valve on special offer. It's a fully pumped system with a Y plan configuration using a Honeywell V4073A motorised mid postion valve. We switched off the power and the valve rested in the hot water only position. It will go to the radiators or to the cylinder coil, depending on which valve was opened. 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. This is because the lever can only drive the valve just a little past the mid-position but the motor drives it much further. In Honeywell V4043H 2-port valves it turns through about 70º (about 11½ minutes on a clock face). Honeywell Motorised Valves — Problems and Fault Finding. Unwanted hot radiators can be caused by bad pipework design but this system had had no pipework changes and had worked normally before. 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