White-Rodgers 152-9 Thermostat

The White-Rodgers 152-9 is a heavy-duty line voltage thermostat engineered specifically for high-load electric heating applications. Built with a rugged heavy gauge steel case, this mechanical thermostat is designed to withstand the rigors of commercial and industrial environments. It features a single pole single throw (SPST) switch architecture with an open-on-rise action, making it a reliable choice for controlling unit heaters, duct heaters, and baseboard systems. The integrated hydraulic action element ensures the unit remains unaffected by motion or moderate vibration, eliminating the need for precise leveling during installation. With a fixed 2 degree Fahrenheit differential and a control range of 55°F to 85°F, it maintains tight setpoint accuracy. This model also includes a dedicated "Summer" dial position, allowing contractors to close the contacts manually to operate a unit heater fan for ventilation without activating the heating elements.

Key Benefits for the Contractor

• High Amperage Capacity: Rated for 25A at 120VAC and 22A at 240VAC, handling heavy resistive loads without the need for additional contactors or relays.
• Universal Mounting: Designed for versatility, the enclosure mounts directly onto a standard vertical 2" x 4" junction box or can be surface-mounted.
• Maintenance-Free Design: The dustproof case protects internal bimetal and hydraulic components from job-site debris and particulate buildup.
• Reliable Calibration: Each unit is factory-calibrated for precision, ensuring the 55/85F line volt ht stat performs accurately out of the box.

Common Questions

• Does this thermostat require a neutral wire? Since this is a line voltage mechanical control, it interrupts the hot leg. Mounting depends on your local electrical code for line voltage switching.
• Can I use this for cooling applications? No, the 152-9 is a heating-only control. For cooling or ventilation-specific needs, a close-on-rise model is required.
• Is leveling required for accuracy? No. Unlike mercury-switch controls, the hydraulic element in this White-Rodgers thermostat is unaffected by tilt or motion.

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.