Issue overview

1. Found this while investigating error diffs from Allow Multiple Air Loops to One Thermal Zone - Part 2 and Fix Zone Air Mass Balance #6272 VariableRefrigerantFlow_FluidTCtrl_HR_5Zone because it tripped new zone unbalanced flow warnings. Reporting the node flow rates shows that TUn Outlet Node flow is always significantly less than TUn Inlet Node flow. Also made a version of VariableRefrigerantFlow_5Zone with cycling fan and the inlet outlet node flow rates are all over the place (sometimes more, sometimes less).

For both the VRF:HR and VRF without HR, using VariableTemp control results in flow imablances. Use ConstantTemp control is ok (this is with cycling fan). So, it may be only certain combinations of cycling fan and VRF AC control type that are broken. Ultimately will need to test all combinations.

Details

Some additional details for this issue (if relevant):

• Version of EnergyPlus Version 8.8.0-ddaa5689de
• Helpdesk ticket 12306

Checklist

Add to this list or remove from it as applicable. This is a simple templated set of guidelines.

• Defect file added EnergyPlusDevSupport\DefectFiles
• Ticket added to Pivotal for defect (development team task)
• Pull request created (the pull request will have additional tasks related to reviewing changes that fix this defect)