Danfoss 088H-3111 Operator

The Danfoss 088H-3111 is a professional-grade TWA-A thermal actuator designed for precise on/off control in hydronic heating and cooling systems. Built to interface seamlessly with Danfoss RA series valves and RA2000 manifolds, this 24V operator is a standard for contractors managing floor heating and radiator applications. Operating in a Normally Open (NO) configuration, the actuator ensures the valve remains open in the event of a power loss, providing critical fail-safe circulation. The integrated thermal wax element delivers a slow, deliberate response to eliminate water hammer, protecting the integrity of your pipework and reducing noise during operation.

This 24V thermal operator features a clear visual position indicator, allowing technicians to verify valve status at a glance without a multimeter. With a low average power consumption of 2 VA and an IP41 protection rating, the 088H-3111 operator is optimized for long-term reliability in utility closets and manifold cabinets. The 1.2-meter (approx. 47-inch) pre-installed cable simplifies 24V actuator wiring during field installs, making it a drop-in replacement for worn-out TWA-A series actuators in residential or light commercial zones.

• Fail-Safe Design: Normally Open function ensures continuous flow during power interruptions for critical heating circuits.
• Valve Compatibility: Engineered specifically for Danfoss RA-type connection points, ensuring a secure, leak-free mechanical interface.
• Hydronic Protection: Slow-acting wax element prevents liquid shock and water hammer in high-flow hydronic floor heating zones.
• Diagnostic Convenience: Built-in visual position indicator provides immediate open/closed status for efficient troubleshooting.
• Efficient Performance: Low 2-watt draw reduces the load on 24V transformers in multi-zone control panels.

Is the Danfoss 088H-3111 compatible with third-party manifolds?
This operator is designed specifically for the Danfoss RA connection profile. While it fits RA-series radiator valves and RA2000 manifolds, it is not a universal-fit part for M30x1.5 or other non-Danfoss manifold threads without a specific adapter.

Can this actuator be mounted in any orientation?
Technicians should ideally mount the actuator horizontally or vertically upright. Mounting it upside down is generally discouraged to prevent potential condensation from entering the housing, though the IP41 rating provides standard protection against vertical water drops.

Does this model include an end switch?
No, the 088H-3111 is a standard 2-wire thermal actuator. For applications requiring an auxiliary end switch to trigger a pump or boiler, you would typically look for the NC/S versions or a 4-wire variant.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.