I think this has more to do with fan heat than an issue with the program. When you limited the fan power at the return node of the OA mixer, you also limited the fan delta T, and therefore the response of the OA controller to the mixed air temperature set point.

(sorry, messed up the traces on the first upload)

The supply air temperature hasn't changed significantly so it's not the TUs that are causing the change in air flow.

I think this has more to do with fan heat than an issue with the program. When you limited the fan power at the return node of the OA mixer, you also limited the fan delta T, and therefore the response of the OA controller to the mixed air temperature set point.

(sorry, messed up the traces on the first upload)

I think this has more to do with fan heat than an issue with the program. When you limited the fan power at the return node of the OA mixer, you also limited the fan delta T, and therefore the response of the OA controller to the mixed air temperature set point.

I think this has more to do with fan heat than an issue with the program. When you limited the fan power at the return node of the OA mixer, you also limited the fan delta T, and therefore the response of the OA controller to the mixed air temperature set point.

I think this has more to do with fan heat than an issue with the program. When you limited the fan power at the return node of the OA mixer, you also limited the fan delta T, and therefore the response of the OA controller to the mixed air temperature set point.