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:ZoneMixerWhere 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.