Here are the links to the methods for the AirTerminalSingleDuctVAVNoReheat, which should be the same for the AirTerminalSingleDuctVAVHeatAndCoolNoReheat class.

• setZoneMinimumAirFlowInputMethod

• setControlForOutdoorAir

In a measure it would might look something like...

objects = model.getAirTerminalSingleDuctVAVNoReheats

objects.each do |obj|
  obj.setZoneMinimumAirFlowInputMethod('FixedFlowRate')
  obj.setControlForOutdoorAir(false)
end