Are they communicating with each other would be a place to start meaning baud rate ...
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I have a Microtech III in a McQuay unit that's not responding to the Johnson Controls BMS telling it what supply temperature to run. This controller was replaced this past summer because the old one let the smoke out. I think it didn't get set back up properly. What setting or settings need changed so it will do what the J.C. BMS is requesting?
Are they communicating with each other would be a place to start meaning baud rate ...
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Search up the engineering guide of that controller, I'm sure it exists as I've come across them and hooked them up. They have onboard menu on the controller itself which you have to configure for BMS control and at that point then can you tell it what to do. As far as I know, you don't have direct control of the unit. You send it a SAT or zone setpoint and it compares it and responds accordingly to hit the setpoint.
Nembus has it right. Read through the guide, and cross-reference what the Microtech controller needs from the BMS to control over the network. A few things that could not have been set up properly: BACnet settings (MSTP: baud rate, device instance, etc. BACnetoverIP: IP address, device instance, subnet, etc.), set for local control, or overridden setpoint. Let me know how you make out cross-referencing the manual, controller settings, and BMS settings.
If you go into the BMS menu or the individual cooling/ heating menus, it will allow you to define a discharge air reset type. Set it to network. The low end and the high end act as limits to what you are able to write over the network.
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J. King
Also the code to configure the Microtech controller is by default 6363