Air Handler Equipment DDC Controllers | HVAC Control
Air Handler Equipment DDC Controllers – These controllers will control an air handler once the wiring is completed. The panel is freshly mounted and waiting for the technician to run the piping and pull the wire from the control points. Other points, such as outside air, temperature sensors in piping or duct work, flow meters, actuators, or other control points can be terminated to these controllers and the data collected from those input points can be networked over the entire building automation system through the communication trunks. Included in this panel are: a terminal strip connection point for line voltage and control voltage, a transformer to step-down line voltage to the required control voltage of 24 volts which powers the controllers and a surge arrestor which is a requirement on many government jobs.
How DDC Status Works – DDC and Status – Is the Device On or Off
This is a current switch sometimes referred to as a CT switch.
The basics of DDC include learning about the status of a fan or a compressor or pump. How does a DDC controller read the status of the device it is monitoring? There are several ways to prove a device is running and some pros and cons of each type of device used to monitor on or off status. This is a basic DDC guide or reference to help a person understand the basics of DDC status and how it works. When one learns how DDC status works they can improve their troubleshooting skills. Too many maintenance technicians and others including HVAC technicians don’t understand DDC systems or building automation systems and are therefore crippled when it comes to troubleshooting DDC systems. High Performance HVAC hopes to change that and help HVAC techs and HVAC maintenance staff learn the basics of DDC systems including how DDC status works. Once someone understands the basics about DDC a light will turn on and they will see that DDC is not really rocket science.
HVAC Controls Building Automation – Modern buildings use DDC controls for building automation systems. Building automation systems offer energy savings because they are energy management systems. These systems allow management to automatically control many processes involved with HVAC systems, lighting, and emergency systems. The systems are generally hooked up to the internet so monitoring and control can be done worldwide. (more…)
DDC Automated Logic M-Stack
DDC Automated Logic M-Stack – This Automated Logic M-Stack provides control for multiple pieces of HVAC equipment and integrates network communication all in one single stack. This direct digital control system is integrated with pnuematic controls. DDC allows automated HVAC control processes to take place and adds higher efficiency to an HVAC system. (more…)
What you will learn from this Building Automation Systems article:
1) the efficiency and conveniences Building Automation Systems add to a building
2) how Building Automation enhances energy savings and troubleshooting problems
3) how allowing controllers to communicate with each other enhances HVAC and electrical systems
4) many of the benefits of Building Automation Systems
5) Resource and Related Links to help you learn more
Many people wonder what Building Automation Systems (BAS) can do. BAS is mainly used in commercial HVAC control systems and energy management system applications. Building Automation itself is an energy management system which saves management companies and building owners by efficiently controlling air conditioning and heating comfort and process systems. BAS is where mechanical and electrical systems and equipment are joined with microprocessors that communicate with each other and possibly to a computer. This computer and controllers in the building automation system can be networked to the internet or serve as a stand alone system for the local peer to peer controller network only. Additionally, the BAS controllers themselves do not need a computer to process the control functions as the controllers have their own internal processors.
Related Link: Learn more about DDC control loops (opens in a new window)
Enthalpy wheel in a heat recovery unit
HVAC Enthalpy & Heat
Energy Recovery Wheels | HVAC Enthalpy & Heat – As the cost of energy rises engineers are looking for ways to improve and increase energy efficiency. Aside from HVAC equipment with higher energy efficiency rates, improving structures for less heat loss and heat gain, and building automation systems giving the equipment precision control for better efficiency of the equipment, there are other ways to increase energy efficiency inside buildings. One of the ways to increase energy efficiency inside buildings is to add energy recovery wheels to the economizer systems. A US Department of Energy study concluded energy recovery wheels can save over 15% of the energy used in commercial HVAC applications.
Siemens Apogee DDC Controller
Building Automation Systems or Direct Digital Controls Learning – HVAC Building Automation Systems (BAS) or Direct Digital Controls (DDC) is pretty much one in the same. Basically described BAS and DDC is combining air conditioning, heating, ventilation, lighting, electrical loads, security systems, and life and safety systems to a computer and complex algorithms for better control over the systems and to offer higher efficiency levels that could not otherwise be achieved without computer control. The are many different opportunities inside the BAS or DDC field but you have to start somewhere. Commercial HVAC Technicians and Electricians are commonly hired into positions as DDC or BAS technicians and BAS and DDC installers. Where do you begin if you want to get into the field of HVAC BAS and DDC
HVAC Definitions Terms & Acronyms | Heating Cooling – This is a comprehensive list of HVAC Acronyms and HVAC Terms. High Performance HVAC is certain there are more terms and acronyms. If you know of something we missed please email us. Thanks!
HVAC Definitions Terms & Acronyms
VSD or Variable Speed Drives
AC – Air Conditioning or Alternating Current
ACCA – Air Conditioning Contractors Associations
AFUE – Annual Fuel Utilization Efficiency
AHU – Air Handling Unit
AI – Analog Input
AMCA – Air Movement and Control Association
AO – Analog Output
AQS – Air Quality Systems
ASHRAE – American Society of Heating, Refrigerating, and Air Conditioning Engineers
AV – Automatic Air Vent
AWG – American Wire Gage
B – Boiler
BACnet – Computer communication protocol for building automation systems and control networks
BAS – Building Automation System
BI – Binary Input
BMS – Building Management System
BO – Binary Output
BP – Backflow Preventer
BTU – British Thermal Unit
BTUh – Brtish Thermal Units per Hour (more…)
HVAC Definitions – In air conditioning and heating the name HVAC is often used. HVAC stands for heating, ventilation, and air conditioning. Other acronyms less used to describe air conditioning and heating applications is HVACR or heating, ventilation, air conditioning, and refrigeration and HACR or heating, air conditioning and refrigeration. HVAC can be used to also describe the trade HVAC where many technicians and support personal work to install, maintain, and service HVAC equipment. Mechanical and electrical engineers and advanced level air conditioning and heating tradesman have the responsibility to design HVAC equipment and properly ensure it is installed correctly. HVAC and HVACR can include very small refrigerators, air conditioners, and heaters and HVAC can also include very large systems which maintain temperature and comfort factors in large commercial building and industrial settings. (more…)
Data Center Tridium HVAC Control Panel
As data centers go and HVAC controls function are typically done controlled with either direct digital controls or a very complex SCADA system with direct digital controls being the preference in most situations. Tridium is a developer of direct digital controls software and hardware and Tridium specializes in controls integration through the Tridium software they develop that allows different devices and different communication protocols to communicate to one another. (more…)