This document is the instruction manual for V4073A motorized mid-position valve, which introduces the application scenario, installation method, technical parameters and other information of the product.
The V4073A motorised mid‑position valve is designed for small‑bore domestic central heating systems, controlling water flow to both radiators and hot‑water cylinders. It is suitable for systems up to 90,000 Btu/h (26 kW) and operates within a temperature range of +5 °C to +88 °C.
The manual provides detailed specifications, spare‑part numbers, safety requirements, wiring diagrams, and step‑by‑step installation and checkout procedures. It also outlines the correct plumbing arrangement, required disconnect switch, and wiring colour codes for heating, hot‑water, earth and boiler connections.
| Voltage | 230‑240V ~ 50Hz |
|---|---|
| Power consumption | 6W |
| Lead supplied | 1 metre, 5 core |
| Operating temperature range | +5 to +88 °C |
| Maximum ambient temperature | +52 °C |
| Pipe fitting sizes | 22 mm & 28 mm compression, 1/2" & 1" BSP |
It operates on 230‑240 V at 50 Hz.
White = Heating on, Blue = Neutral, Grey = Hot water off, Green/Yellow = Earth, Orange = Boiler and pump live.
No, the valve must not be fitted on the return pipework under any circumstances.
Powerhead Part No. 40003916‑003, Motor Part No. 40002737‑003, Ball & ‘O’ Ring Kit Part No. 272742A CARD.