Must have a complete understanding of Freon, thermostatic expansion valves, cap tub systems, accumulators, filter dryers all types, liquid receivers, evaporator, and condensing coils, hermetic, semi-hermetic, scroll and all other types of compressors, for their repair and proper operations. About the Team: The Public Services Facilities Division is an internal service that provides maintenance and repairs to City buildings such as City Hall, the Sorenson Unity Center, Smith's Ballpark, and fire stations.