With a Maximum Operating Pressure (MOP) of 660 PSI and an anti-hunt bulb charge

a Class H coil and alternative seal materials like Viton or EPDM may be required

For compressor protection after a burnout

The wrapped cover on the B60 is specifically designed to be more tolerant of slippage and slight pulley misalignment

protecting the internal brass trim from mineral buildup

Siemens Building Technology 192-224 Thermostat 320819-301 With a Maximum Operating PressureThe Siemens 192 224 Powerstar room thermostat is a specialized pneumatic temperature control solution designed for large scale building automation and commercial HVAC energy management. This dual setpoint thermostat features two pipe, high capacity air logic to provide precise day night (D N) control, allowing for efficient temperature setback during unoccupied hours. Operating as a direct acting (DA DA) controller, it utilizes a sensitive bimetal