Siemens Building Technology 188-0030 Thermostat Refrigerant Durability: Constructed from bronze with

Durability: Constructed from bronze with an EPDM seat

As the direct replacement for 311788

Using a calibrated multimeter

ensuring optimal refrigerant flow and cycling

Always verify the part number against your unit's wiring diagram or the OEM parts list

Siemens Building Technology 188-0030 Thermostat Refrigerant Durability: Constructed from bronze withThe Siemens 188 0030 is a heavy duty unit mounted pneumatic thermostat designed specifically for high low temperature control in HVAC terminal units like fan coils and induction units. This TH 188 HC model features a direct acting (DA) heating and reverse acting (RA) cooling sequence, making it a critical component for two pipe changeover systems. Engineered with a bimaterial sensing element, it provides reliable proportional control and pneumatic