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whereas some Series 20 configurations require it to be clipped
A17 features a 69mm detector tube and a built-in stepper motor that drives a mechanical shutter
repeated pressure switch lockout errors
angular shock
Siemens DDC R540-100 Control 319848-301 whereas some Series 20 configurationsThe Siemens R540 100 is an Open Processor (OP) Terminal Box Controller designed specifically for Variable Air Volume (VAV) systems within the Siemens APOGEE network architecture. This Refurbished Terminal Box Cntrl operates using P1 FLN (Floor Level Network) protocols, allowing for seamless integration into legacy BTU Building Automation Systems. This DDC component manages specific HVAC applications, including pressure independent VAV and single duct