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ISS: Science & Technology Site
ISS Facility Services brought us in to deliver urgent works at a critical site, where a failing chilled water system posed a serious risk to business continuity. Maintaining stable environmental conditions was essential across this science and technology facility, particularly for key areas such as server rooms and specialist labs.
With Pump 5 already failed, the entire system was running solely on Pump 6—an obsolete unit over 20 years old. A single fault, such as a pump trip, split bellows or inverter failure, could have led to complete loss of chilled water, triggering costly downtime or emergency cooling. Further complexity came from the plant room layout, which limited access and required specialist lifting equipment. The existing isolation valves had also failed, meaning careful planning was essential to minimise disruption during the works.
We recommended a full pump replacement, along with upgrades to several associated components to reduce both current and future risk. The works were planned around a scheduled system shutdown and included: localised drain-down, replacement of faulty isolation and non-return valves, installation of a new pump, and new suction/discharge bellows. To keep disruption to a minimum, drain-down works took place out of hours, with the remainder completed during the day.
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The system has been safely reinstated, with the key risks now brought under control. With updated valves and improved access for maintenance, the client can now replace the second pump as part of a lifecycle plan—rather than a reactive emergency. The result is a more resilient setup with greater long-term flexibility.
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