White-Rodgers 11D18-1 Control

The White-Rodgers 11D18-1 Control is a rugged, well immersion hydronic control designed for precise temperature regulation in hot water heating systems. Engineered for high-reliability performance, this immersion hot water control functions as a high limit, reverse action, or SPDT switching unit. It features a broad operating temperature range of 100°F to 240°F (Open High) and an adjustable differential of 5°F to 45°F, allowing technicians to fine-tune system cycling and prevent short-cycling in varied boiler configurations. The fast-acting hydraulic action element ensures immediate response to temperature fluctuations, maintaining strict setpoint accuracy.

For contractors, the 11D18-1 offers versatile field installation with support for both horizontal or vertical mounting. The unit includes extra capillary length to accommodate extended shank wells and features specialized screw terminals with "ears" that securely grip both solid and stranded wiring. With a switch rating of 10A at 120 VAC and 6A at 240 VAC, the SPST open on rise configuration provides a dependable solution for heavy-duty HVACR applications where consistent thermal safety and control are required.

• Versatile Application: Functions as a high limit or reverse action control in diverse hydronic environments.
• Adjustable Precision: 5°F to 45°F adjustable differential allows for optimized system efficiency and reduced wear on components.
• Contractor-Friendly Wiring: Large wiring room with top/bottom knockouts and specialized terminals simplifies field electrical connections.
• Flexible Mounting: Internal excess capillary and orientation-independent design allow for seamless replacement in tight mechanical spaces.
• Reliable Sensing: Hydraulic action element provides rapid and accurate thermal sensing without the lag found in inferior controls.

Can this control be used as a replacement for the 11D18-17?
Yes, the 11D18-1 serves as the direct replacement for the 11D18-17, maintaining the same form factor and technical specifications.

Does this unit include the immersion well?
This specific model is typically supplied without the well (less well), though it is compatible with standard and competitive sized wells for immersion applications.

What are the electrical contact ratings for this control?
The SPST contacts are rated for 10.0 Amps at 120 VAC and 6.0 Amps at 240 VAC (Full Load), making it suitable for standard burner and circulator circuits.

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.