{"product_id":"siemens-building-technology-192-224-thermostat","title":"Siemens Building Technology 192-224 Thermostat","description":"\u003cp\u003eThe \u003cstrong\u003eSiemens 192-224 Powerstar room thermostat\u003c\/strong\u003e is a specialized \u003cstrong\u003epneumatic temperature control\u003c\/strong\u003e solution designed for large-scale building automation and commercial HVAC energy management. This \u003cstrong\u003edual setpoint thermostat\u003c\/strong\u003e features two-pipe, high-capacity air logic to provide precise \u003cstrong\u003eday\/night (D\/N) control\u003c\/strong\u003e, allowing for efficient temperature setback during unoccupied hours. Operating as a \u003cstrong\u003edirect acting (DA\/DA)\u003c\/strong\u003e controller, it utilizes a sensitive bimetal element that modulates air pressure in response to thermal changes, ensuring stable operation for \u003cstrong\u003epneumatic valves\u003c\/strong\u003e and damper actuators. The unit transitions between setpoints by adjusting the supply pressure: 18 psi for day operation and 25 psi for night mode. This makes the \u003cstrong\u003eSiemens 192-224\u003c\/strong\u003e an essential component for contractors managing multi-zone facilities like schools and hospitals, where optimizing system efficiency via pressure-switched setbacks is a technical priority. Its Celsius-scaled adjustment range of 7°C to 30°C and compatibility with standard 5\/32\" OD plastic tubing facilitate a streamlined \u003cstrong\u003eHVAC retrofit\u003c\/strong\u003e or new system integration.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Setpoint Efficiency:\u003c\/strong\u003e Enables separate temperature limits for occupied and unoccupied cycles via 18\/25 psi supply air switches.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect Acting Reliability:\u003c\/strong\u003e The \u003cstrong\u003eDA\/DA switching configuration\u003c\/strong\u003e ensures consistent proportional output for heating and cooling logic.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManual Override:\u003c\/strong\u003e Features an integrated override lever on the chassis, allowing occupants to temporarily return to day mode without resetting the entire zone.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Air Capacity:\u003c\/strong\u003e Large-volume air relay provides faster response times and supports multiple downstream actuators on a single branch.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEase of Calibration:\u003c\/strong\u003e Includes a factory-accessible test port for measuring control pressure without removing the cover, reducing diagnostic time for field technicians.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I switch the Siemens 192-224 between day and night modes?\u003c\/strong\u003e\u003cbr\u003e\nSwitching is handled pneumatically. Changing the supply air pressure from 18 psi to 25 psi automatically toggles the internal relay to the night setpoint.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this thermostat compatible with 3-pipe pneumatic systems?\u003c\/strong\u003e\u003cbr\u003e\nNo, this specific model is a \u003cstrong\u003e2-pipe pneumatic thermostat\u003c\/strong\u003e. Contractors needing a 3-pipe configuration should look for localized high-air-capacity variants specific to those architectures.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I calibrate the sensitivity in the field?\u003c\/strong\u003e\u003cbr\u003e\nYes, the sensitivity is field-adjustable from 1 to 4 psi\/°F (12 to 50 kPa\/°C) using the graduated scale on the internal chassis.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: 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.\u003c\/p\u003e","brand":"Siemens Building Technology","offers":[{"title":"Default Title","offer_id":43682894479538,"sku":"192-224","price":242.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_328bfe64-9025-4457-bd76-ba867763c598.png?v=1775692182","url":"https:\/\/www.gsistore.com\/products\/siemens-building-technology-192-224-thermostat","provider":"GSIstore","version":"1.0","type":"link"}