Projects
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AArch3 . jpg < Caption > The Legacy Yard at the Umhlanga Arch development . < Credit > © Grant Pitcher
© Grant Pitcher © Luft Technik © Grant Pitcher
The Legacy Yard at the Umhlanga Arch development .
The residential plant – VRF outdoor plant .
he Hilton roof plant – open circuit cooling towers .
An internal view of the Arch , showing the courtyard area and retail shops on the ground level .
The central fresh air plant is located on the roof of the building . The DX air handling plant delivers pre-treated fresh air to the building . The fresh air system includes variable speed drives linked to pressure differential sensors , to maintain the correct volume of fresh air to the building . An alternative to ducting the fresh air within the shafts was to thermally line the riser shafts internally with insulated boards call P3 ducting .
The air-conditioning system to all apartments is linked to a central management system housed in the operations room in the basement . This system is basically a building management system for monitoring purposes .
A billing module was also integrated into the design to ensure that each tenant ’ s electrical consumption can be billed separately .
Offices The office block is also fitted out with a VRF system , with the condensers all on the ground floor . Each office level and wing is zoned separately on individual condenser circuits . The common refrigerant pipework runs in a riser , through a common passage on each level .
This was done to ensure that the pipes are easily accessible by all tenants should the wings be divided .
One indoor unit is allocated per 60m ². Perimeter and internal zones are separated on dedicated units . The condensers and piping size and selection are based on this zoning which maybe be refined as a tenant ’ s specific requirements becomes available .
The central fresh air plant is located on the ground floor . The DX air handling plant delivers pre-treated fresh air to the building .
Car dealership The large open plan double volume showrooms are conditioned by mean of constant volume DX air handling
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RACA Journal I May 2021 www . hvacronline . co . za