Danfoss 088H3114 Operator

The Danfoss 088H3114 is a professional-grade TWA-A thermal actuator designed for reliable on/off control in hydronic floor heating and radiator systems. Operating on a 24V AC/DC supply, this normally closed (NC) operator features a 4-wire connection with an integrated end-switch (NC/S), allowing for the synchronization of external equipment like pumps or boiler relays when the valve is fully open. Engineered for precision, the internal wax element ensures a slow, smooth opening and closing cycle to effectively prevent water hammer in the loop. This unit is specifically compatible with the Danfoss RA2000 valve series and standard floor heating manifolds. Each thermal wax actuator includes a prominent visual position indicator, providing rapid field verification of the valve state—vital for complex diagnostic tasks. With a 0.95-meter pre-installed cable and IP41 protection, it is built to withstand standard mechanical room environments while maintaining consistent performance in demanding heating applications.

• Integrated End-Switch: The 4-wire configuration with a built-in auxiliary switch allows for direct control of auxiliary equipment like circulating pumps.
• Water Hammer Prevention: Thermal wax technology ensures gradual actuation, protecting the system from hydraulic shocks and mechanical stress.
• Danfoss RA Compatibility: Designed for a seamless mechanical fit on Danfoss RA series valves and manifolds without the need for additional adapters.
• Visual Diagnostics: A top-mounted position indicator allows technicians to confirm at a glance if the zone is active or closed.
• Industrial Durability: Robust construction with an IP41 enclosure rating ensures longevity in high-temperature heating environments up to 140°F.

What is the typical opening time for the TWA-A 24V actuator?
Being a thermal wax actuator, the Danfoss 088H3114 takes approximately 3 to 5 minutes to reach full extension after the 24V signal is applied. This deliberate delay is a design feature to stabilize flow and prevent sudden pressure spikes.

Can this 4-wire actuator replace a standard 2-wire Danfoss actuator?
Yes, it can be used in place of a 2-wire model (like the 088H3110) provided there is space for the additional wires. The two extra wires provide the end-switch functionality, which can be left disconnected if the boiler or pump logic does not require it.

Is the 088H3114 suitable for steam radiator applications?
No, this actuator is specifically rated for hot water hydronic systems. The high ambient temperatures associated with steam can cause the internal wax element to liquify prematurely, leading to false operation and potential component failure.

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.