White-Rodgers 752-2 Switch

The White-Rodgers 752-2 is a professional-grade SPDT changeover switch designed for automatic thermostat control in hydronic applications. Engineered specifically for combination hot and chilled water systems, this control manages the operation of zone valves by sensing pipe temperature. The 752-2 features a bimetallic disc with snap-action contacts, ensuring rapid transition without arcing. The sensing element is curved to provide maximum thermal contact with 1/2" tubing (5/8" O.D.), and the assembly is encapsulated in an epoxy resin seal to prevent dust, dirt, and corrosion from degrading internal components.

For efficient system changeover, the 752-2 is factory-calibrated to open at 85°F and close at 70°F (Red-Black leads), providing a reliable automatic changeover when the media temperature shifts between heating and cooling cycles. This surface-mount control includes a conduit connector and 12-inch leads (No. 18 AWG, 105°C insulated) for rugged electrical connections. It supports a motor rating of 7.5A at 120V AC and an ambient temperature maximum of 221°F, making it a staple for HVAC contractors maintaining two-pipe hydronic systems.

• Automatic System Switching: Eliminates manual intervention by providing SPDT control based on the medium temperature.
• Enhanced Durability: The epoxy resin seal ensures high-reliability performance in harsh mechanical rooms.
• Precision Sensing: Curved element design maximizes surface area contact on 5/8" O.D. copper tubing for accurate temperature response.
• Contractor Ready: Included conduit connector and pre-stripped 18 AWG leads streamline field installation for zone valve wiring.

Is the 752-2 compatible with individual heating or cooling only systems?
While technically an SPDT switch, it is purpose-built for automatic changeover in systems that alternate between hot and chilled water. Using it in single-source systems is generally redundant.

What is the proper mounting procedure for this switch?
Secure the control directly to the 1/2" tubing using the provided removable spring clip. Ensure the curved sensing surface is flush against the pipe and apply thermal paste if necessary for faster thermal response.

Can this be used with 240V systems?
Yes, the White-Rodgers 752-2 is rated for 3.75A at 240V AC (Full Load) and up to 22.5A Locked Rotor Amps, allowing versatility across different HVAC voltage requirements.

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.