As a workaround, instead of the ZoneHVAC object you could use the scheduling flexibility of an AirLoopHVAC with:

• AirLoopHVACOutdoorAirSystem
• ControllerOutdoorAir
• CoilHeatingGas
• CoilCoolingDXSingleSpeed
• FanOnOff (might not be allowed on an AirLoopHVAC)
• AirTerminalSingleDuctUncontrolled

To schedule the fan to run during the day create a schedule for the AirLoopHVAC object's Availability Schedule field.

To schedule the fan to cycle on during the night use an AvailabilityManagerNightCycle object with the Control Type set to CycleOnAny.

To schedule the OA damper to be closed at night create a schedule for the ControllerOutdoorAir object's Minimum Outdoor Air Schedule or Maximum Fraction of Outdoor Air Schedule fields, which could be the same as the AirLoopHVAC Availability Schedule (e.g. fractional 0 to 1). Note that an economizer may interact with this.

As a workaround, instead of the ZoneHVAC object you could use the scheduling flexibility of an AirLoopHVAC with:

• AirLoopHVACOutdoorAirSystem
• ControllerOutdoorAir
• CoilHeatingGas
• CoilCoolingDXSingleSpeed
• FanOnOff (might not be allowed on an AirLoopHVAC)

To schedule the fan to run during the day create a schedule for the AirLoopHVAC object's Availability Schedule field.Schedule.

To schedule the fan to cycle on during the night use an the AvailabilityManagerNightCycle object with the Control Type set to CycleOnAny.

To schedule the OA damper to be closed at night create a schedule for the ControllerOutdoorAir object's Minimum Outdoor Air Schedule or Maximum Fraction of Outdoor Air Schedule fields, which could be the same as the AirLoopHVAC Availability Schedule (e.g. fractional 0 to 1). Note that an economizer may interact with this.