Precision Thermal Calibration: Factory-set at 170°F to provide a reliable safety ceiling for the heat exchanger

The unit utilizes double break contacts to provide a positive make and break

the 060633801 is the authorized factory replacement for part number 60633801

and O series valves

Refined Integration: Purpose-built for ASCO valve enclosure kits

Siemens Building Technology 188-0031 Stat R-448A Precision Thermal Calibration: Factory-set atThe Siemens 188 0031 (Model TH 188D) is a professional grade unit mount pneumatic thermostat designed for precision control in fan coil units and unit ventilators. As a direct acting (DA) instrument, it employs a liquid filled sensing element and a remote bulb to provide gradual acting control of heating or cooling mediums. Operating on a force balance principle, this thermostat ensures high linearity and rapid response to temperature fluctuations