Siemens Building Technology 188-0031 Stat 321894-706 technicians ensure the system operates

technicians ensure the system operates within manufacturer-specified pressure envelopes

While dimensions may look similar to other brands

This is a direct aftermarket equivalent for the A6-70221 tank cover

OEM Reliability: Replacing worn burners with genuine Lochinvar 100135304 parts protects the heat exchanger from hot spots and uneven heat distribution

Siemens Building Technology 188-0031 Stat 321894-706 technicians ensure the system operatesThe 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