[zmanvortex]

Can HVAC Pro configure a VMA1430 for VAV w/reheat to utilize discharge temperature reset control strategy? We have done it with programmable and newer terminal controllers from various manufactures.

We are trying to utilize this strategy for limiting discharge temperature:

https://www.ashrae.org/file%20library/technical%20resources/standards%20and%20guidelines/standards%20addenda/g36_2018_h_galley_20200817.pdf

 

[zmanvortex]

Thanks numbawunfela. I still don't see how that sideloop would change how the reheat valve and damper would sequence? I don't think it utilizes a DAT SP point in the sequence.

 

[zmanvortex]

I don't see that there is an ability to modify the "canned" program. The controller is only "configurable" through check boxes using HVAC Pro software. I don't have the software or controller in front of me so my question was to whether there was an option (check box) in HVAC Pro to configure that particular controller to sequence to discharge air for single duct VAV w/reheat. All of the documentation I found doesn't really answer that question for me. Thanks for the hints numbawunfela!

 

[zmanvortex]

You can accomplish a reset using LCT.

Are you saying I can put custom logic into a VMA1430 using the LCT tool? Are you sure about that?

 

[zmanvortex]

Yes, LCT is most definitely the easiest way to do it, especially if you are only talking about a few VMA's. The HVACpro logic CAN be changed though; as in new questions, answers and IOs. I have been doing it for a few years now. If you have several hundred or even several thousand VMAs and not enough space in your NAE then it may be worth the effort.

Ok, now you have my curiosity going full tilt. What tool do you use to create these new questions, answers and IOs? How do you tie these new questions, answers, and IOs to new logic in the controller?