Great video. Little tip for anyone in the field, these U-line Automated Logic cards operate in a antiquated way compared to modern stuff. The U-line cards (any controller that has a U before the numbers, IE U551, U220, U341V+, etc.) are controlled by a master controller, called a UNI16 or UNI32. All of the programs for the slave devices in the U-net are held in the UNI card. The slave devices essentially act like expanders to the UNI card. The slave devices do not communicate back to the BMS head end, only the UNI controller does. If an individual equipment is not running but the rest of the controllers on that network trunk are working, the end device has (probably) failed. If you have several VAV boxes/FCUs that are not working, and they are in the relative same location, like on the same floor or same section of the building, its most likely the UNI card that is having problems. Always check for 24V input and solid terminations on the RS485 connection (will be labeled as CMNet, ARCNet or U-net on the controller). I was a master tech for Automated logic and I have a lot of experience with these guys.
Shit do you work in the Boston area? Been having ALC issues for months and can’t get anyone here to fix it. They’ve sent out a guy a few times but he literally spends half the day on the phone with someone else. My last building was Continuum(super easy) but I actually like automated logic. I’ve learned alot and like the options it has.
Wow!!! That is a VERY Clear and Direct Explanation of the Topic!!! Thanks! So i am a Old Building HVAC guy.. looking to re-set my Carrer & Life, in to the Controls side of the house. Do you have any.. advice... or tips, that i could use to make the transition..easier .. smoother???
Had a thought as I was listening to you. The inputs are your eyes reading/seeing system operating conditions. The outputs are the hands flipping switches and turning dials. Always thinking of new ways to explain things to the new guys, so thanks.
