Dude, just want to say thanks for taking the time to do these training videos. Switched over to commercial over a year ago from doing residential for a decade. These videos have helped me better understand a lot of the equipment I've been working on.
@@HVACTIME The control side can be. VAV's on the mechanical side quite simple not a lot of moving parts just gotta take the time and think what's going on here. This was a good lesson and your videos are quite comprehensive and concise. This is great for a lot of the new techs out there who are coming from residential. My first encounter with a vav I was like wtf is this. Took off the side saw the plc and was wired to actuators and a reheat valve I was like ok I know what they're trying to accomplish. Great video I enjoy these on my breaks or cool downs
I had a customer that had a similar complaint of the tenant knocking the ceilings out and the noise of the box cycling on and off. A way around this problem can be mercury contactors, they are the same in theory as a standard 1,2,3 pole contactor but are not mechanical so there is no slamming sound happening, hopefully this helps someone lol.
i have a issue with a VAV system with 2 AHU (AHU 1 100% cooling) (AHU 2 100% outside air) they're connected together and there's a damper from the supply of the AHU 2 to the AHU 1, my issue is that the VAV vents are sweating, there's a BAS system controlling everything and i have a wrong sensor reading 5000F on the AHU 1, that sensor is the CLG sensor (COIL TEMP) that sensor reads the temp coil, then i guess that is my problem because the BAS right now have the both AHU's in on positions cooling valves are 100% opens on both AHU's, VFD's for both AHU's are running on position 40-50%, they're not in AUTO MODE they're blowing air without modulating, so i would like to know if that is my issue? the CLG sensor not reading right? because if i put everything back auto both cooling valve's get back to 0% closed, any advice?
Its classified as analog because it it used with the purpose of controlling something 0 to 100%. It make close a contact for a pulsed signal but it is still a variable control.
Hard to see what your are drawing on the white board, and the reflection from the overhead lights makes the camera's exposure hunt as well as the focus. You should try and change the camera position to eliminate reflection and lock down the focus and exposure.
