The 066111 is the NC actuator option for the LK 525 MultiZone zone valve series, intended for on/off control of heating zones (2‑way and 3‑way valve bodies). It’s designed to be clipped onto the LK valve bodies and shows valve position on the actuator top surface.

Key specifications 
•     Supply: 230 VAC, 50 Hz; power consumption ~7 VA.
•     Torque: 5 Nm (as listed for this actuator).
•     Cable: 1m fixed cable, 3 × 0.75 mm² (blue, brown, black) with PVC insulation.
•     Stroke / speed: 12 seconds for 90° rotation (fast operation).
•     Control: Single‑pole SPST (two‑point) signal; NC version closes when de‑energised.
•     Protection / environment: IP44 (cable version); operating ambient typically +1 °C to +60 °C; media up to 80–90 °C briefly; max working pressure 1.0 MPa (10 bar); max differential pressure 100 kPa (1 bar).

The actuator is intended for the LK 525 valve bodies (MultiZone series). Do not install with the actuator facing downwards; most orientations are allowed otherwise.
•     Manual positioning is possible after removing the actuator (turn valve stem) for service or commissioning.
•     Ensure the 230 VAC supply and wiring match the actuator’s fixed‑wire color code; if you need a Molex connector option, some variants and documentation reference Molex‑compatible connections for actuator-only setups.
Risks, limitations, and checks before purchase
•     Confirm torque requirement: 5 Nm is typical for these valve bodies, but if you’re replacing a different actuator or a stuck valve, verify the valve’s required torque and differential pressure to avoid stalling. High differential pressures (>1 bar) can prevent correct operation.
•     Environment: IP44 is splash‑protected but not fully weatherproof; for outdoor or wet locations, verify enclosure/protection needs.
•     Fluid compatibility: Suitable for water and water‑glycol mixes (glycol max ~50%); ethanol limits apply — check your system fluid mix before fitting.