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Part of a £ 14 million refurbishment. Exi-tite was selected to design, supply and support a replacement chilled water system that served 312 bedrooms, function rooms via air handling units and fan coil units in open areas on the ground floor and the swimming pool and spa. 

The existing chiller plant and cooling towers were replaced with modular water-cooled chillers operating with dry coolers. Four YORK condenser-less modular chillers, 193 kW each, were selected with dimensions of 1210mm length x 850mm width x 1500mm high; these modules are compact and lightweight at 1162kg, fitting into the approximate 10m2 plant room. Adiabatic coolers were chosen to offer increased cooling capacity from a reduced footprint and associated energy efficiency gains. 

It was decided to integrate the chiller system into an existing heat energy loop. Including the condenser water loop into the circuit allows heat energy to be utilised in the summer to maintain the heating applications such as the swimming pool and jacuzzi heating circuits. 

The system was integrated with an existing BMS through integrated Modbus RS485 connections. This allowed the BMS to stage and rotate the operation of the four chillers depending on the flow and return temperatures on chilled water and the condenser loop feeding into the energy recovery loop. 

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