Resideo VU843A1020 Actuator

The Resideo VU843A1020 is a heavy-duty fan coil actuator engineered for commercial hydronic systems requiring reliable two-position control. Operating on 24 Vac, this spring return actuator is designed for seamless integration with VU52, VU53, and VU54 series valve bodies. Featuring an SPST controller connection, the unit provides a full 22-degree stroke with a 15-second motorized timing and a rapid 4-second spring return for precise flow management. Built for longevity in demanding environments, it utilizes a stainless steel case and an aluminum cover to protect internal components from moisture and mechanical stress. The inclusion of a manual operator lever allows for easy commissioning and emergency bypass during power failures, while the 8-inch lead wires simplify wiring in tight mechanical plenums. This HVAC zone valve motor is the standard for maintaining tight shut-off and consistent performance in high-traffic fan coil applications.

• Direct Compatibility: Specifically designed to mate with VU-series 2-way and 3-way valve bodies for versatile field replacements.
• Rapid Fail-Safe: Mechanical spring return ensures the valve reverts to its normal position in under 4 seconds during power loss.
• Durable Construction: The stainless steel case prevents corrosion, extending the service life of the hydronic valve actuator in humid conditions.
• Easy Installation: Features a 1/8-inch manifold pressure rating and standard 8-inch electrical leads for quick integration into existing 24V control loops.
• Manual Override: Lever allows for manual opening of the valve, facilitating system flushing and air purging without requiring power.

Can the VU843A1020 be used with other valve brands?

No, this actuator is specifically designed for use with Resideo and Honeywell Home VU52, VU53, and VU54 series valve bodies. Using third-party bodies may result in improper stroke alignment and potential motor burnout.

What is the difference between this and the VU844 series?

The VU843 series is typically used for SPST (two-wire) control applications, whereas the VU844 series is designed for SPDT (three-wire) floating or on/off control requirements.

Is this actuator suitable for high-humidity environments?

Yes, the combination of a stainless steel case and aluminum cover provides superior protection against the condensation often found in fan coil units and cooling applications.

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.