An overlooked control logic detail in hospital air handling units led to recurring freezestat trips and heating instability during the winter, illustrating how small automation choices can have big operational impacts.
When air handlers first enable economizer mode, overlooked control sequences can trigger temperature and humidity spikes that pose real risks to critical environments.
Cooling tower spillover during chiller rotation shows how thoughtful programming, sequence tweaks, and field fixes can tackle system instability in both winter and summer conditions
HVAC systems experience their most challenging moments during operational transitions – when systems first enable, modes shift, or equipment rotates or stages to meet demand. These brief windows often reveal instability that routine operation may hide.
When a bronze valve met incompatible boiler chemicals in a hospital, the result was catastrophic: widespread system failure and costly damage, all avoidable with a single review step, says John Rophael, P.E., mechanical engineer at Engineering Design & Testing Corp.
How small changes in chiller sequencing can trigger outsize instability – and practical automation strategies to keep HVAC transitions smooth and alarms quiet
Dive into how chiller rotation sequences in variable flow HVAC systems can unexpectedly disrupt operations –
and how refined automation logic can help keep things running smoothly.
A guide to building a structured, quality-driven approach for equipment and system startup in central HVAC projects, ensuring efficiency from design through commissioning.
In Miles Ryan's latest Commissioning column for ES NEWS, he explores why disruptions occur, how simple automation tweaks can prevent energy waste, and what commissioning engineers should look for in the field.