Siemens 188-003-0 Thermostat

Direct/Reverse Acting (Cooling)/ 18 psi unit mounted thermostat. 40 scim average air usage restrictor with 3/8″ diameter bulb on a 48″ capillary. The 188 series thermostat is a gradual acting unit with remote bulb operating on the force-balance principle, using feedback to obtain linearity and maintain selected room temperature by positioning pneumatic devices to control heating and cooling.

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