192-204K Siemens Thermostat

This Powerstar Pneumatic Day/Night Pneumatic Room Thermostat is direct acting for day/night applications, 18 psi day and 25 psi night, and provides proportionall dual setpoint, two-pipe high air capacity room temperature control with relay. Fahrenheit scale. The thermostat automatically resets the room temperature setpoint during unoccupied hours by changing the supply air pressure to the thermostat. A manual override feature allows occupants to switch to day mode. The override returns to night mode the followng night. 1/2-inch setpoint knob. For a complete list of Siemens TH19X Powerstar Room Thermostat mounting hardware, covers and accessories, See Section A of Siemens Master HVAC Products Catalog, part number 144-001. ; The 192-204K 192 204 W/LARGE Knob