Error in Fresh Air Handling Unit
After assigning 32 Fan Coil Units and 3 Fresh Air Handling Units with COPs, simulation is giving error for FAHUs. It says:
- Too many zone mixers in Return Air Path=FAHU1 DEMAND SIDE RETURN PATH
- Too many zone mixers in Return Air Path=FAHU2 DEMAND SIDE RETURN PATH
- Too many zone mixers in Return Air Path=FAHU3 DEMAND SIDE RETURN PATH
- Return air Path(s) did not pass integrity testing
What is the solution to this? Because 8 zones are assigned to FAHU1, 8 to FAHU2 and 12 to FAHU3.
I suspect you have (wrongly) more than one mixer on the demand side of your airloopHVACs, but without seeing the related portion of your IDF, there's hardly a way to help.
What do you mean by mixers? You mean the exhaust air fan?
AirLoopHVAC:ZoneMixer
Where is it in FAHU visually?
I mean the AirLoopHVAC:ZoneMixer like @adhilton said. Again, without seeing the IDF file (the IDF generated by design builder, not the design builder file, I don't have a license myself), hard to help. Maybe a designbuilder user could help with the DB file though.
Here's the link to the IDF file of my simulation.
https://1drv.ms/u/s!Ase9DtM9ZxGyjAruk...
@adhilton
@Julien Marrec I checked in the IDF file. Yes there are more than one mixers. But one FAHU is serving more than one zones. So won't it definitely have more than one mixers too?