ASHRAE Publishes Direct Digital Control System Guideline
Direct digital control (DDC) systems provide savings in energy conservation, maintenance and labor, as well as allowing better control over buildings. The benefits of DDC systems and recommendations for specifications of such systems in hvac control applications are included in a newly published guideline from the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) (Atlanta).
ASHRAE Guideline 13-2000, Specifying Direct Digital Control (DDC) Systems, addresses DDC for hvac control, monitoring and management functions, specifying hardware, performance and training. It covers system architecture, input/output structures, communications, program configuration, system testing and documentation.