Schneider Electric (Barber Colman) 2216-126 Thermostat

The Schneider Electric 2216-126 is a professional-grade three-pipe pneumatic thermostat engineered for high-accuracy temperature regulation in commercial HVAC systems. Functioning as a direct acting day/night thermostat, this unit facilitates seamless transitions between setpoints based on branch line pressure shifts. Designed as a direct replacement for the 2216-026, it ensures drop-in compatibility for legacy Barber Colman infrastructure without requiring extensive recalibration of existing pneumatic lines. This model includes a remote sensing element, making it ideal for installations where the thermostat body must be mounted away from the primary airflow or in secure enclosures. The 2216-126 operates without dial limit stops, providing a full range of setpoint adjustment for precise environmental control. By utilizing a throttling range that optimizes actuator response, this pneumatic room thermostat maintains tight tolerances in multi-zone air handling units and terminal reheat applications, ensuring reliable performance in demanding mechanical environments.

Key Technical Benefits

• System Compatibility: Serves as the official 2216-026 replacement to minimize downtime during maintenance cycles.
• Precision Control: Features a three-pipe configuration for distinct heating and cooling control signals via air pressure modulation.
• Versatile Mounting: Integrated remote sensor allows for accurate ambient temperature monitoring in restricted or high-clearance areas.
• Dual-Setpoint Operation: Efficiently handles day/night switching to support energy conservation strategies in commercial facilities.
• Direct Acting Logic: Increases branch line pressure as the sensed temperature rises, ensuring standardized integration with normally open valves and actuators.

Common Installation & Maintenance Questions

How do I calibrate the 2216-126 for specific pressure ranges?
Calibration is managed via the internal test port; ensure your main air supply is stable at 20 psi for day operation and 25 psi for night transitions to verify setpoint accuracy.

Can this thermostat replace other Barber Colman 2200 series models?
This unit is the specific technical successor to the 2216-026. For other models, verify if your system uses two-pipe or three-pipe logic and whether direct or reverse action is required.

What are the benefits of the remote sensing bulb on this model?
The remote element prevents localized heat gain from the thermostat chassis itself, providing a more accurate reading of the actual room aspirated air rather than surface-mounted conditions.

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.