Aprilaire 700A Humidifier - Automatic control question
 

I recently completed a barter job with an HVAC professional who provided and installed an Aprilaire 700A humidifier for me. However, he installed it in manual mode which requires me to set the temperature manually as it fluctuates outside.

I know this model is able to utilize an outdoor sensor to control this automatically but I am unable to find any information on what parts I need or where to purchase. Does anyone have any suggestions on this?

Your unit should have come with everything that you need ot set up for automatic. Did somthing get misplaced? Sensor is in the box.