YAES - HOS BV

1 YAESAIR COOLEDSCREW CHILLERR407C REFRIGERANTCOOLING CAPACITIES369 kW to 613 kWThe yaes (QPak) range of chillers aredesigned for water or water-glycol are two product families, standardand high efficiency, which are equippedwith semi-hermetic twin helical screwcompressors and fuzzy logic control toprovide high full and part load efficienciesand reliable optional low sound version (Sonata)ofboth the standard and high efficiencymodels has an acoustically treatedenclosure, containing the compressors,pipework, valves and the evaporator head.

2 And specially designed low sound twospeed heat recovery condensers ordesuperheaters are also units are designed to be locatedoutside on the roof or at ground and OptionsRefrigeration Flow DiagramsOperating LimitationsSelection Guide - CoolingSelection Guide - Heat RecoveryCooling CapacitiesSelection Guide - Glycol Cooling30% Ethylene Glycol CapacitiesPhysical DataElectrical DataConnection DiagramsClearancesDimensionsAVAILABLE MODELS, NOMINAL CAPACITIESTABLE 1and SOUND PRESSURE LEVELSFEATURESBENEFITSO ptional acoustic component enclosure and two speedfansLow sound efficiency operating efficiency semi hermetic screw efficient, long life independent refrigerant standby power and control compartments withlockable doors and emergency stop safety control with visual display oftemperatures, Pressures, motor currents, operatinghours, number of starts and start/stop data logging and temperature setpointreset capability.

3 Energy management andimproved operating logic capacity remote alarm management system central data logging and single point fullsystem monitoring and transition star delta starting closed transition star delta changeover spike reduces the risk ofelectrical interference. Additionally smoothed lowstarting power factor correctionReduces energy Recovery and Desuperheater cost hot water for heating or domestic factory run quality control and ensures that the unitoperates satisfactorily prior to to ISO 9001 EN standard of quality No.

4 PC144 (TEV)0415 0465 0525 0565 0595 0625 CoolingkW369415482503541578 Standard UnitsdB (A) Units (fans at high speed)dB (A) Units (fans at low speed)dB (A) RecoverykW435435435527527527 DeSuperheaterkW3337434548520495 0515 0535 0585 0615 0655 CoolingkW446476505527570613 Standard UnitsdB (A) Sound Units (fans at high speed) dB (A) Sound Units (fans at low speed) dB (A) RecoverykW435435435527527527 DeSuperheaterkW404245475155 Cooling capacities at 7 C leaving chilled liquid temperature and 35 C heat recovery capacities at 40 C leaving hot liquid temperatureand 7 C leaving chilled liquid Desuperheater capacities at 60 C leaving hot liquid temperature.

5 7 C leaving chilled liquid temperature and 35 C ambient air pressure levels for standard and low sound units are at 10 Efficiency Family - yaes -HBStandard Family - yaes -SBSPECIFICATIONThe yaes air cooled chiller shall becompletelyassembledwithallinterconnect ing refrigerant piping andinternal wiring, ready for field unit shall be pressure tested,evacuated, and fully factory charged withrefrigerant and oil in each of theindependent refrigerant assembly, an operational test shallbe performed with water flowing throughthe evaporator to ensure that eachrefrigerant circuit operates unit structure shall be manufacturedfrom heavy gauge, galvanised steel andcoated with baked-on powder paint(Desert Sand (RAL 1019)).

6 CompressorsEach compressor shall be direct drive,semi-hermetic, rotary twin screw type andinclude the following items: Two screw rotors, with asymmetricprofiles, manufactured from forgedsteel. A cast iron compressor housingprecision machined to provide optimalclearance for the rotors. The entire compressor, from suction todischarge shall have a design workingpressure of 31 bar. Capacity control : The compressorsshall start at the minimum load positionand provide a capacity control rangefrom 100% to 10% of the full chiller loadusing a continuous function slide microprocessor controlled outputpressure regulating capacity controlvalve shall be supplied to commandcompressor capacity independent ofcontrol valve input pressure and tobalance the compressor capacity withthe cooling load.

7 An automatic spring return of capacitycontrol valve to the minimum loadposition to ensure compressor startingat minimum motor load. An internal discharge check valve toprevent rotor backspin upon shutdown. Anacousticallytuned,internaldischarge muffler to minimise noise atthe source, while optimising flow formaximum performance. Discharge shut-off service valves (withoptional suction shut-off valves). A reliable suction gas cooled highefficiency, accessible hermetic motor. Two types of compressor motorstarting are available: star/delta opentransition starter and optional star/deltaclosed transition starter.

8 A suction gas screen and serviceable, micron full flow oil filter within thecompressor housing. A 350 W compressor body SeparatorOil separators with a design workingpressure of 31 bar shall be the highefficiency, augmented gas impingementtype to maximise oil CoolerOil cooling shall be provided by adedicated air-cooled finned tube type heatexchanger located in the condensersection of the CircuitsAn independent refrigerant circuit shall beprovided per compressor. Each circuit willuse copper refrigerant pipe formed oncomputer controlled bending machines toreduce the number of brazed jointsresulting in a reliable and leak line components shall include.

9 Manual shut-off valve with charging port,highabsorptionremovablecorefilter-d rier, sight glass with moistureindicator, and thermostatic lines shall be covered withclosed-cell evaporator is a shell and tube designwith refrigerant on the tube side and wateron the shell side. Tubes are formed in a U shape and held in a tube bundle, whichis free to expand independent of the independent circuit shall be providedfor each compressor. The shell designworking pressure shall be bar (150psi), and bar (355 psi) for the evaporator shall have water passbaffles manufactured from corrosionresistant/non metallic composite material,removable heads for access to internallyenhanced, seamless, copper vent and drain connections shallalso be water nozzles are fitted with PN16flanges per ISO 7005 part 1a.

10 Companionweld flanges to match evaporator flangesshall be supplied loose for field installationby contractor. All necessary nuts, boltsand gaskets shall be evaporator shall be equipped with athermostatically controlled heater forprotection to -29 C ambient and insulatedwith 19 mm flexible closed-cell models in the range have aneconomiser fitted to the refrigerantcircuits. This is a refrigerant-to-refrigerantplate type heat exchanger to maximiseunit capacity and efficiency by achievingadditional liquid refrigerant unit control system controls theeconomiser via a dedicated units have condensers fittedwith single speed fans.