eQuest gurus……

How do I get an IU system with air side economizer to obey Min OA Ratio?  I have:

Min OA set at 40%, Min OA Schedule that is set to 0 during unoccupied hours and 0.001 during occupied hours and no OA specified at zone level

However:

When OA temp goes above the economizer dry bulb limit, OA ratio goes below 16%. Also, even though the Min OA Schedule is set to 0 during morning warm-up/cool-down when the supply fan comes on I am getting an OA ratio > 0.

Any new thoughts would help my brain out of the repetitive loop where it is now stuck.

Thanks in advance

Melissa