An air handling unit that hasn’t worked since, well, ever. Chillers that have to work more often as a result — and an extra chiller just to attack the affected zone. These were the obvious symptoms, but what was the cause? Was economizer mode guilty, or framed? Or was it correct to paint leaky valves as the culprit? As the author demonstrates, a disproven theory just gets you one step closer to the truth.
One of my favorite stories is about when I fixed a poorly performing air handling system at a local art museum. Our goal was to renovate some office areas in one of the older sections of the museum. The facility manager was concerned that the renovation would not be successful because the AHU serving that area had never seemed to work since it was installed.