International Environmental 71488513 Actuator

The International Environmental 71488513 Actuator is a heavy-duty 24V replacement part designed for integration with Taco zone valves and fan coil units. Engineered for compatibility with IEC (International Environmental Corporation) hydronic systems, this normally open (N.O.) thermal actuator ensures reliable fluid flow control in commercial and residential HVAC applications. Featuring a 3W/2W power consumption rating, it provides energy-efficient operation while Maintaining the high torque necessary for positive valve shut-off or opening.

For contractors working in tight mechanical closets, the 96-inch lead wires offer significant flexibility, eliminating the need for mid-run splicing and ensuring a clean connection to the 24VAC control board. This model, often cross-referenced as ZB2494H1 or B035-71488513, is the standard OEM choice for restoring fan coil unit performance. Its 2-wire/3-wire configuration makes it a versatile solution for systems requiring precise hydronic zone control. Built to withstand the rigorous cycling of multi-zone layouts, this actuator is a direct drop-in for IEC B035-71488507 models, ensuring your HVAC maintenance schedule remains on track without needing extensive repiping.

Key Benefits

• OEM Compatibility: Specifically designed for International Environmental equipment and Taco valve bodies.
• Extended Reach: Includes 96" electrical leads to accommodate large fan coil cabinets and complex wiring paths.
• Normally Open Logic: Default N.O. configuration ensures flow during power loss or failsafe requirements.
• Low Power Draw: Efficient 24V AC/DC operation reduces the load on system transformers.
• High Durability: Engineered to handle the thermal stress and high cycle rates of hydronic heating and cooling systems.

Common Questions

Is this actuator compatible with other valve brands?
While primarily designed for IEC and Taco systems, it is a direct replacement for Taco ZB2494H1 series actuators but should be verified against your specific valve body mounting pattern.

Does the 71488513 require a specific mounting orientation?
In hot water applications, it allows for flexible mounting, but for chilled water systems, it is best practice to install the actuator no more than 85 degrees from vertical to prevent condensation from entering the housing.

Can I use this to replace a normally closed (N.C.) version?
No, this is a Normally Open actuator. Installing it in place of an N.C. model (like the 71488512) will invert your system logic, causing the zone to heat or cool when the thermostat is satisfied.

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.