192-226 | Siemens | Pneumatics & Fittings

This 192 Powerstar Day/Night/Vent Pneumatic Room Thermostat with Vent is Direct Acting for Day/Night Applications, 18 PSI Day and 25 PSI Night, and Provides Proportional Dual Setpoint, 3-Pipe High Air Capacity Room Temperature Control. Celsius Scale. The Thermostat Automatically Resets the Room Temperature Setpoint During Unoccupied Hours by Changing the Air Pressure to the Thermostat. A Manual Override Feature Allows Occupants to Switch to Day Mode. The Override Returns to Night Mode the Following Night.