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. The Honeywell V4043H1106 28mm 2-port zone valve has 6 wires. Five of these wires are the same as 22mm 2-port valve.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. Although specifically designed for small bore central heating systems, the valve can be used in commercial and industrial applications. Motorized two port zone valve Features: A normally-closed valve is closed when no power is being applied to it and needs electrical power to drive it open.

Honeywell make a large range of motorised valves used in domestic central heating systems. The most common by far are the 22mm 3-port, 5-wire, mid-position valve and the 22mm 2-port, 5-wire, zone valve. These 22mm valves (3-port V4073A1039 and 2-port V4043H1056) are used in smaller and medium sized properties. Please note: This is NOT a genuine Honeywell Zone Valve, but it is a compatible alternative to the Honeywell V4043H 1056 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.

Product Specification

In smaller properties there is usually one programmer which has two channels. One programmer channel controls the heating (radiators or underfloor) and the other programmer channel controls hot water. Where additional zone valves are used there will usually be another programmer or timer. Honeywell motorised valve construction 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. The valve is not energised.

Crimps are metal tubes within plastic insulation, which are flattened using pliers to trap two wires, joining them electrically. These crimps can sometimes be re-opened by using pliers to squeeze together the edges of the flattened tube. This can be done with the plastic in place. If successful it frees the two wires. The plastic insulation may break, in which case the crimp is discarded. The Honeywell mid-position motorised valve has three ports in a T configuration. Water enters via port AB. Water leaves by either port A or port B or by both at the same time. Port A is normally connected to the radiator circuit and Port B to the cylinder coil (to heat hot water). The circulating pump is usually connected to feed water from the boiler into port AB.Replacement synchronous motors for multiple series of motorised valves are available at BES. One of our most versatile replacement motor is found here. 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. A normally-open valve is open when no power is being applied to it and needs electrical power to drive it closed. The Honeywell motorised valve faults detailed above are likely to apply to most domestic Honeywell valves. Complete with sealing balls and plates, our power head conversion kits are compatible with the V4043H, V4044C or V4073A series replacement heads.