2024年9月28日 · DDC stands for Direct Digital Control. It is a control system technology used in commercial HVAC applications, such as chiller plants, condenser water systems, variable air volume (VAV) systems, VAV boxes, fan coil units, and more.

2023年1月5日 · There are four basic points that are used in DDC control diagrams. #1 Analog Outputs (AO) – Modulate a damper or valve through a range of flow. The control signal is usually sent as a 0-10 VDC or 4-20 milliamp electrical signal to the device to be controlled.

2019年4月15日 · What is DDC or Direct Digital Controller? In a nutshell, DDC is a controller which use the analogue or digital signals from various devices of a field sensor and actuators and then process and control the system based on the programme written inside the controllers and has the capability to sends the information to another controller or DDC.

Direct digital control is the automated control of a condition or process by a digital device (computer). [ 1 ] [ 2 ] Direct digital control takes a centralized network-oriented approach. All instrumentation is gathered by various analog and digital converters which use the network to transport these signals to the central controller.

DDC control systems have variable f()frequency drives (VFDs) as standard equipment on: • CliCooling towers • AHU’s and VAV fans • Pumps • Chillers PNWD-SA-8834 1-36

2018年3月13日 · DDC systems offer control over a building’s functions, and can help increase a building’s comfort levels while decreasing its energy consumption. Because of this, DDC systems help minimize a building’s impact on the environment, and often pay for themselves after a fairly short period of time.

Our comprehensive product line includes a range of advanced controllers, sensors, and other components designed to deliver precise, reliable control of your HVAC systems. In addition to our top-of-the-line products, we also offer a range of professional services, including installation, maintenance , consulting, and support.

2020年5月15日 · In a nutshell, direct digital control systems will save you money in the long run while giving your technicians better control and situation awareness over your network. DDC controls basics emphasize cost savings and operational efficiency.

5 天之前 · Expand your knowledge of direct digital control (DDC) for HVAC building systems. Learn how to plan the system architecture, evaluate open protocols, and follow best practices for a variety of HVAC applications.

Volume of air delivered is varied using inlet dampers or electronic speed controls based on supply duct static pressure setpoint. Reset discharge air temperatures and mixed air temps based on zone requirements. Reset hot and cold deck temps based on zone loads & temperatures.