Water-Cooled Condensers - HTS

Part Load EfficienciesPart load efficiencies and Integrated Part Load Values (IPLV) for AW units are calculatedaccording to the requirements of the latest AHRI Standard 550/590-2003 and meet or exceedASHRAE Efficiency Standard 90.1. Since most air conditioning systems operate at less thandesign full load most of the time, IPLV is an excellent method for comparing the efficiencies ofchillers.AHRI CertificationThe AHRI certification program does not include units with remote condenser and they are notcertified. However, the rating and testing procedures follow the AHRI standard where possible.NoiseAll Daikin McQuay WGS chillers are equipped with hermetic screw compressors withinherently low sound levels. For sensitive locations, optional acoustical compressor enclosureswill further reduce sound levels. See page 44 for sound data.Electrical Control CenterThe WGS has a novel two-section electrical panel. Theouter section has three MicroTech II microprocessorcontrollers providing operating and equipment protectioncontrols plus transformers, terminal boards andoperational switches. Opening this panel section revealsthe inside power section with two solid state motorstarters, fuses, two circuit breakers, and power block(s) ordisconnect switch (switches), depending on optionsselected.Electronic Expansion ValveThe WGS chiller is equipped with the most advancedmeans of refrigerant flow control available. An electronicexpansion valve coupled with a MicroTech II unitcontroller provides excellent operating efficiencies bothat full and part load operation.Unlike conventional thermal expansion valves whichrequire a large pressure drop across the valve and result inhigher condenser head pressure, the electronic valve doesnot need a large pressure drop across it to operate effectively. During part load operation, theelectronic valve allows the system to operate at a lower condensing pressure, minimizes suctionline superheat, and provides more stable system operation. Unit efficiencies can be dramaticallyimproved. The electronic expansion valve for the GeneSys chiller line provides precise controlwith a quick response time.Catalog WGS-1 WGS 130A – 190A 7