Keep Keen scores a winner at new Doncaster stadium

Included in the control regime of the Priva BMS at Keepmoat Stadium in Doncaster are 150 Mitsubishi VRF air-conditioning units.
Keep Keen Controls has installed a control system from Priva Building Intelligence at the new £32 million Keepmoat Stadium in Doncaster. The controls design included interfacing with 150 Mitsubishi split air-conditioning systems. This 15 700-seat stadium is home to Doncaster Rovers Football Club, Rovers Bells Women’s Football Club, Lakers Rugby League Club and the local athletics club. Facilities include an 800 m2 supporters’ bar, 250-seat restaurant, gymnasium, martial-arts centre and conference and events centre. Keep Keen was contracted to design, install and commission the building-management system and specified Priva Building Intelligence. Each of the four plant rooms is managed by a Priva Compri HX8 controllers. A Mitsubishi VRF air-conditioning system provides heating and cooling and is interfaced with the Priva BMS. John Ward, managing director of Keep Keen, explains, ‘Generally, splits operate in a standalone mode with local controllers for individual comfort. Trying to maintain control over such a large number of split air conditioners, even though they are grouped together, can lead to uncomfortable conditions for the occupiers and lead to excessive energy use. ‘With such a big site and large transient population, we immediately saw the benefits of interfacing the splits with the BMS, thereby allowing the BMS to collectively manage the air conditioners, dependent on the needs of the individual areas.’ The splits use the Mitsubishi proprietary protocol, but a specialist company has produced a gateway (Procon) that converts this protocol to BACnet, enabling 2-way communication between the BMS and the Mitsubishi splits over an IP network, providing central control of the air conditioners and eliminating the need for a dedicated building-services communications network. The site electricity meters use Modbus, so the BMS can communicate with the meters for monitoring and analysis, as Modbus is one of the standard protocols available with all Priva controllers. The consumption of gas and water are also monitored. Keep Keen is monitoring the site using the dial-up capability of the Compri HX8 controllers and has been awarded the controls maintenance contract.
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