192-228 : Siemens TH 192 HC Pneumatic Thermostat, Heat/Cool, 2 Pipe, °C

Siemens 192-228 Model TH 192 HC thermostat is a proportional single output, dual setpoint, 2-pipe (high air capacity) sensor controllers. Each thermostat includes a wall mounting plate for installation in a variety of rough-in terminal boxes. This thermostat provides all-season temperature control for two-pipe hot water/chilled water heating and cooling applications (Figure 1) such as air conditioners, space heaters, and unit ventilators.

Features:
· Direct and reverse acting models for heating and cooling modes.
· Separate adjustable temperature setpoint indicating dials for heating and cooling.
· Fahrenheit or Celsius setpoint dials.
· Highly sensitive bimetal thermostatic element.
· Individual field adjustable sensitivity with graduated scale.
· Operating mode automatically switches between heating and cooling on change of main air supply pressure.
· Integral field adjustable limit stops.
· Control pressure test port accessible without removing cover.
· Easily replaceable thermometer, setpoint dials, filters, and restrictor plate.
· Covers available for concealed or exposed thermometers and for either concealed, key, or exposed knob adjustment and setpoint indication.