Siemens Building Technology 192-208 Stat

For facility managers and HVAC contractors maintaining legacy pneumatic systems, the Siemens 192-208 Powerstar pneumatic thermostat provides a high-reliability solution for two-pipe temperature control. This dual-setpoint heating/cooling thermostat is engineered to handle proportional control of valves and damper actuators, featuring a 45 to 85°F setpoint range. The 192-208 serves as the direct replacement for the 2218-301, allowing for seamless integration into existing TH 192 HC wall box installations without requiring extensive repiping. Its internal bimetal elements deliver precise sensitivity, while the 18 to 25 psi supply air range ensures automatic changeover between direct acting (DA) heating and reverse acting (RA) cooling modes. Designed for the rigor of technical environments, this 2-pipe pneumatic room thermostat includes an integral test port for rapid diagnostic checks and field-adjustable limit stops to maintain strict building efficiency standards.

• Universal Compatibility: Serves as a validated field substitute for the discontinued 2218-301 pneumatic thermostat, ensuring system continuity.
• Automatic Changeover: Transitions between heating (25 psi) and cooling (18 psi) logic based on main air supply pressure, eliminating manual seasonal adjustments.
• High Air Capacity: Built for 2-pipe pneumatic systems, providing sufficient pilot air volume for large-scale actuator positioning.
• Field Calibration Ready: Includes a dedicated control pressure test port accessible under the cover, allowing for real-time calibration without breaking line connections.
• Rugged Bimetal Sensing: Highly sensitive thermostatic elements provide a 0.1°F temperature response for stable proportional output.

Is the 192-208 a direct drop-in for the 2218-301 model?
Yes, the Siemens 192-208 is the designated replacement for the 2218-301. It utilizes the same Powerstar chassis architecture and 5/32" OD tubing connections, making it a standard retrofit for TH 192 HC heating/cooling applications.

How does this unit handle heating and cooling actions?
This model is configured for Direct Acting (DA) on the heating setpoint and Reverse Acting (RA) on the cooling setpoint. An increase in temperature during heating mode raises output pressure, while an increase in temperature during cooling mode lowers it.

Can I adjust the sensitivity in the field?
Absolutely. The unit features field-adjustable sensitivity ranging from 1 to 4 psi/°F, allowing you to fine-tune the proportional band to match the specific response characteristics of your pneumatic actuators.

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.