The White-Rodgers 1687-9 Temperature Control is a heavy-duty refrigeration temperature control engineered for precision in demanding commercial applications. This SPDT refrigeration thermostat features a broad operating temperature range of -30°F to 90°F (-34°C to 32°C), providing technical flexibility for walk-in coolers, freezers, and zoning systems. Designed as the direct replacement for White-Rodgers 1687-11, this unit utilizes a hydraulic action element and an 8-foot capillary tube to ensure accurate sensing in remote mounting configurations. The adjustable differential, ranging from 4.5°F to 40°F, allows technicians to fine-tune compressor cycling to prevent short-cycling and maintain tight thermal regulation. Built with a dustproof steel case and high electrical ratings (7.4 FLA at 120V), it often eliminates the need for additional motor starters or relays in standard 120/240 VAC installations. Key Benefits Versatile Compatibility: Functions as a high-performance 1687-11 replacement for various commercial cooling systems. Precision Tuning: Features a wide 4.5°F to 40°F adjustable differential control to optimize system efficiency. Rugged Construction: Encased in a dustproof steel housing with top and bottom knockouts for simplified field wiring. Simplified Interface: Includes a dual-scale dial graduated in Fahrenheit and Celsius, adjustable through the cover for quick setpoint changes. Remote Sensing: Equipped with an 8-foot capillary and a 5-1/4" x 3/8" bulb for versatile sensor placement. Common Questions Is the White-Rodgers 1687-9 a direct fit for the 1687-11? Yes, the 1687-9 is the designated manufacturer replacement for the discontinued 1687-11 model. Does this control close on temperature rise or fall? This unit is a close-on-rise control, making it ideal for refrigeration applications where the compressor must engage as temperatures climb. Can I use this without a motor starter? Its high electrical ratings allow for the direct operation of most refrigeration equipment without secondary relays, provided the load does not exceed 7.4 FLA at 120V. 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.
