Yes! But, only if a Pelican device is controlling the outside air damper.
When a Pelican thermostat communicates to the Pelican outside damper controller, they will work together together to either use cold outside air to pre-cool a room instead of running mechanical cooling OR to keep the outside damper shut to pre-heat a room without bringing in cold outside air.
The economizer function can be used up to four hours before the Optimum Start scheduled time. If Optimum Start decides to use the economizer, but is unable to cool the room by the set time, it will enable mechanical cooling as well.