Dear Colleagues,

There is one issue, for which I still can't find the right way to model it with TRACE.

This is VRF HR (Heat Recovery). Actually the problem is the results seen on the reports and visualization charts. After longtime reading, checking, training courses..., I believe I've started to build the system up (to enter the data) as TRACE requires: Backup heat source (el. resistance), heat rejected to heating plan, etc. Also the outdoor unit was set up to operate till 0 ^OF as per the project.

VRF HR (air cooled) system in its performance, not only operate as heat recovery, but also operates like heat pump (either only heating or only cooling). This is because as per its construction (Daikin, Mitsubishi, and all the rest) the ratio of indoor to outdoor capacity is referred to as "combination ratio" and manufacturers allow combination ratios that exceed 1.0.

Being acquainted with these VRF HR specifics, I was expecting from the reports and visualization charts to see exactly such performance. Even kind of indication that Backup heat is not activated, because of condenser outdoor air was set to 0 ^OF.

My Question/Request is: What should be done in order to see such performance in the reports.

If TRACE is not structured to show this, advice please from your experience how to present the results, so that they illustrate that VRF HR is simulated.

From CDS told me that I have a misunderstanding of what VRF HR and what VRF Heat Pump is. After continuous communication, at the end they told me, that what I was looking for is Heat Pump and should model it like Heat pump.

Looking forward to your replies,

Best Regards

Vassil Vassilev