Optimum 22 mm Motorised 3‑Port Mid‑Position Valve – perfect for modern pumped central‑heating systems. This genuine Optimum valve combines a reliable spring‑return actuator with 22 mm compression fittings and a 220‑240 V AC switched output, letting you direct boiler water to hot‑water only, heating only, or both at the same time.
Key benefits
– Seamless integration with room thermostats, cylinder thermostats and programmers for fully automated control.
– Compact design fits vertically or horizontally, saving space in tight boiler rooms.
– Built‑in manual lever makes commissioning quick and hassle‑free.
Technical specs
| Parameter | Value |
|---|---|
| Supply voltage | 220‑240 V AC, 50 Hz |
| Power consumption | 6 W |
| Operating temperature | +5 °C to +88 °C |
| Cable length | 1 m |
| Max differential pressure | 1 bar |
| Max static pressure | 10 bar |
| Max fluid temperature | 100 °C |
| Max ambient temperature | 52 °C |
| Switch rating | 3 A resistive |
| Mounting | Vertical or horizontal |
| Fittings | Included compression fittings |
Installation snapshot
1. Follow the supplied wiring diagram (white = heating call, grey = hot‑water off, orange = boiler & pump call, blue = neutral, green/yellow = earth).
2. Position the Auto/Manual lever in Manual Open when removing the old actuator or when filling/venting the system.
3. Secure the valve with wrench flats – never use the actuator for leverage.
All wiring must meet IEE regulations and be performed by a qualified electrician. The valve arrives boxed with full installation instructions and an auxiliary switch for added flexibility.
Upgrade your heating control with Optimum’s trusted 3‑port mid‑position valve – reliable performance, easy setup, and energy‑smart operation.
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