Lloyd Preston 
19 November 2018 
PROJECT CHALLENGE
A unique consideration of this project came from the client requiring the ability to shut off the cooling system during colder months to protect against freezing. This meant we had to ensure that any water storage tanks installed could be totally emptied via an automated custom drain off system remotely managed by the client.
The project also required an extremely high inlet flow rate in order to meet the demands of the internal HVAC system.
However, due to the turbulence caused by the extreme flow rate entering the water tanks, traditional level control systems wouldn’t be suitable. Furthermore, the area available to install the required water storage units was very limited. This added more complexity to the already very unique project.
PROJECT SOLUTION
After a full site survey, we advised that a rooftop QuadraTANK would be the most appropriate space-saving solution to house the water storage and booster set. Also, in order to overcome the water turbulence caused by the high flow rate, the standard solenoid valve needed to be replaced with a special fast-close, battery powered backup actuator valve.
Additionally, to comply with local water regulations and meet the flow rate needed, we installed a specially designed 3.2m tall separate ElevaTANK break-tank at ground-level to store water from the mains inlet. This stored water was then pumped into the rooftop QuadraTANKs and fed into the HVAC system.
Using this combined system, we were able to meet local water regulations, supply the rooftop tanks with the constant water supply needed to cope with the demands of the industrial HVAC cooling system used at Digital Reality, and ensure the cooling system could be safely switched off in the winter months without the risk of freezing.
