Schneider Electric (Barber Colman) 2218-132 Thermostat

The Schneider Electric 2218-132 pneumatic thermostat is a dual-purpose, two-pipe room thermostat designed for dual-temperature control in complex HVAC systems. This summer-winter thermostat provides seamless switching between heating and cooling modes by responding to changes in main air pressure. Engineered for precision, it features reverse acting and direct acting capabilities, ensuring reliable setpoint maintenance in commercial environments. As a versatile pneumatic temperature controller, the 2218-132 functions without dial limit stops, allowing for full-range adjustment of the 55 to 85 degree Fahrenheit setpoint. This unit is the direct manufacturer replacement for legacy models 2218-031, 2218-032, and 2218-532, making it an essential component for retrofitting aging Barber Colman pneumatic systems. The chassis architecture supports high-flow capacity for rapid actuator response and incorporates a bimetal sensing element for long-term calibration stability. For contractors, this unit simplifies inventory by consolidating multiple application requirements into a single, robust proportioning pneumatic thermostat.

Key Benefits for Technicians:

• Dual-Mode Operation: Automatically switches between direct and reverse action based on system air pressure (typically 15/28 psi or 18/25 psi), supporting seasonal summer-winter changeover.
• Direct Legacy Replacement: Designed to replace 2218-031, 2218-032, and 2218-532 without requiring extensive piping modifications or mounting adjustments.
• High Flow Capacity: Delivers sufficient CFM to drive multiple actuators or large valve assemblies without the need for additional volume boosters.
• Field Calibration: Features accessible calibration screws and test ports for precise pneumatic system balancing and setpoint verification.
• Durable Construction: Built with high-grade internal components to withstand the vibrations and environmental demands of mechanical rooms.

Common Questions:

How do I configure the 2218-132 for summer/winter changeover?
This model utilizes a dual-pressure main air supply. In "winter" mode (typically lower pressure), it operates with one action (e.g., DA), and when the system increases to "summer" pressure, it automatically shifts to the alternative action (e.g., RA) to control cooling valves correctly.

Does this unit come with mounting hardware?
This item is the thermostat chassis. For new installations, a universal mounting base and appropriate wall plate must be sourced separately. If replacing a Barber Colman 2218 series unit, existing backplates are generally compatible.

Can I use this model to replace a single-setpoint thermostat?
While it can function in a single-setpoint capacity, the 2218-132 is specifically engineered for systems requiring two setpoints or seasonal action changes. Using it for simple applications is possible but may be overkill compared to a standard 2212 or 2214 series unit.

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.