RACA Journal October 2021 | Page 34

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Project
Several Carbon Monoxide ( CO ) sensors are installed in the basements and connected to a central control panel . The CO sensors are an energy saving feature that prevents basement fans to run continuously and consume unnecessary power . When there is a fire or smoke alarm signal , all basement fans will start and override the CO monitor system .
© RACA Journal | Benjamin Brits
One of the CO monitors installed .
New staircase and lift pressurisations are installed to ensure
compliance to the local and national life safety building
regulations . Twelve new stair-case pressurisation fans were
installed – of which 6 are duty and 6 are standby . The stair
pressurisation systems were designed so that some ducts
serve levels fourteen down to basement 3 , while other
systems serve levels fifteen to level twenty-nine . Two new lift
pressurisation fans are also installed .
1
Pieter de Bod | WSP
Revit modelling of part of the staircase pressurisation systems .
© RACA Journal | Benjamin Brits
1 - 3 : The stair pressurisation system on the 30th floor .
© RACA Journal | Benjamin Brits

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RACA Journal I October 2021 www . hvacronline . co . za