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 ductwork, 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.
Continue reading “Air Handler Equipment DDC BAS Controllers” »
Hot water coils inside of 
How often have you heard someone complain about inspectors or code officials whose job it is to inspect mechanical, electrical, plumbing, and other trades work for safety and quality workmanship? One could argue that workmanship or even design can be horrible and the work pass a code inspection but chances are if the trades have any integrity they want the job to look good whether it is for the inspector or whether it is for pride and quality of work. It is not only good for the tradesman but it can make the inspection of the job better and smoother for everyone. That brings us to the purpose of this article. There are many homes and commercial buildings out there with 
The magnehelic measures duct pressure inside of ductwork. It is important, for many reasons, to know the pressure inside of ductwork. This magnehelic measures the supply side pressure of the blower inside the 
Ductwork is necessary to deliver the air throughout the 
