"They took the covers off very neatly, laid them to the side and clipped all the copper lines," Mike Firmin, executive director of Golden Harvest Food Bank, said Sunday.
The thieves cut a chain-link fence to get to the units, Firmin said.
They also destroyed two units at a neighboring business, he said.
The units cooled offices at the food bank's headquarters in the 3300 block of Commerce Drive.
"The good thing is at least the weather is mild now. It's not August or the dead of winter," Firmin said.
The food bank will pay an insurance deductible and have the units replaced, Firmin said.
Golden Harvest distributes food to the needy in 30 Georgia and South Carolina counties and operates the Master's Table, a soup kitchen in downtown Augusta.