When the air conditioning at Atherton Elementary School was running after hours, Direct Digital Control Field Technician Dustin Agnew headed to the campus to find out why.   

Agnew first checked the master control panel and the variable-frequency drives, making sure everything was set to “auto.” He then went outside to inspect the chillers and quickly found the problem — both were running, but only one was supposed to be on.  

“I enjoy figuring out what’s wrong, because it could be so many different elements,” he said. 

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