I am new to Node-Red and I'm also trying to make BACnet/IP work. From what I see, in your Node-Red is your not actually "doing" anything. You have a BACnet discovery tool and that is sending out a Who-Is and pulling in Data for you to see. In your NR you have a connection setup but not requesting anything. did you link it to a Debug and see what the output is for it?
Also looking at your read I don't recognise what your trying to READ.
If your trying read a device description
Your Type needs to be : 8
Your instance : 0453800
Your Property Id : 28
Multiple read : checked
If want to retrieve everything for investigation
Your Type needs to be : 8
Your instance : 0453800
Your Property Id : 8
Multiple read : checked
to read Analog value-94 00 Zentrale ...
Your Type needs to be : 2 // analog value
Your instance : 1
Your Property Id : 85 // pv present valve
Multiple read :
When you use example flow does whois at least return Device 0453800 in the debug window?
Where are you running Node-RED ?
Are you running the CC Discovery tool on the climate-computer ?
I ask as I've found that if your running a BACnet explorer on a same PC as yabe room sat simulator/demo server then NR BACnet read or write will Fail. So that might be the issue.
A final note node-red BACnet works for simple read/write I've been running on my test rig for over a year with out any problems.