Hochiki's ESP open protocol fire detection system was installed at the Wellcome Trust Centre for Human Genetics, University of Oxford, replacing an ageing closed protocol system, while maintaining fire detection cover throughout with minimal disruption.
The Wellcome Trust Centre for Human Genetics (WTCHG) is a research institute of the University of Oxford, funded by the University, the Wellcome Trust and numerous other sponsors. Its scientific objective is to explore all aspects of the genetic susceptibility of disease, including the understanding of how DNA variants contribute to the risk of disease in the population. Research activities include bioinformatics, cardiovascular disease, genomics, immunity and inflammation, metabolism, neurogenetics, statistical genetics and transgenics.
The University of Oxford Safety Office insists upon open protocol systems, together with commonality of equipment. The reason for this requirement is to be able to have a central maintenance contract with a competent contractor for the whole of the University estate, negating any problems with accessing software or equipment availability. The use of Hochiki devices and Kentec control panels for all replacement and new systems has been the norm for the past twenty years.
Oxfordshire based Pyrotec Services was asked to look at the existing system with a view to total replacement, which included renewing all existing devices and control panels, the retention wherever possible of all existing wiring, the provision of loop powered sounders, the enhancement of detection coverage, and improvement of access for maintenance purposes in certain areas, particularly within ceiling voids and lift shafts.
The project involved installing a 12 loop, 96 zone, analogue control panel and associated devices utilising the existing cabling infrastructure. Approximately 1,000 devices were installed including nearly 500 intelligent multi-heat sensors, which incorporate a variable temperature heat element and a rate of rise heat element – both of which are controlled from the control panel, allowing either one or both elements to be active in making the fire decision.
Asked why multi-sensors were the preferred option, Pyrotec's Paul Slater comments:
“Due to the diversity of work being carried out at WTCHG, it was important to have the option of being able to switch between detection modes on a daily basis. This provided versatility without compromising on safety."
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