Daikin EWWD320DZXSA1, Installation, Operation, Maintenance Manual

Page 1: ...persedes D EIMWC01405 18EN WATER COOLED OIL FREE CENTRIFUGAL CHILLERS EWWD DZ EWWH DZ Cooling capacity from 320 to 1480 kW 50Hz Refrigerant HFC R134a R1234ze E Original Instructions Installation maintenance and operating manual D EIMWC01405 18_01EN ...

Page 2: ...l circuit 17 3 OPERATION 19 3 1 Operator s responsibilities 19 3 2 Unit description 19 3 3 Safeties for each cooling compressor 20 3 4 System safeties 20 3 5 Regulation type 20 3 6 Compressor Lead Lag 20 3 7 High condensing pressure control 20 4 MAINTENANCE 21 4 1 Pressure Temperature Table 22 4 2 Routine maintenance 23 4 2 1 Check condenser performance 23 4 2 2 Electronic expansion valve 23 4 2 3...

Page 3: ...D EIMWC01405 18EN 3 32 Fig 1 Single compressor unit component descriptions ...

Page 4: ...n Liquid line shut off valve High pressure safety valves Refrigerant charge service valve Starter valve 12 13 14 15 16 17 18 19 20 21 Liquid line expansion valve Economizer line expansion valve Economizer line temperature sensor Economizer line pressure transducer Suction temperature sensor High pressure transducer Liquid temperature sensor Low Pressure safety valves Service valve Inverter cooling...

Page 5: ...tion of the labels applied to the electric panel Identification of labels 1 Manufacturer s logo 6 Wire tightness check 2 Electricity warning 7 Shock hazard 3 Emergency button 8 Lifting instructions 4 Type of gas 9 Unit nameplate 5 UN 2875 ...

Page 6: ...d pump interlocks making installation easier and more reliable All operating safety and control systems are factory installed in the control panel The instructions in this manual apply to all models of this series unless otherwise indicated 1 2 Application The EWWD H DZ units with centrifugal compressor and adjustment inverters are designed and constructed to cool buildings or industrial processes...

Page 7: ...rant shall not be able to flow into any ventilation fresh air opening doorway trap door or similar opening in the event of a leak Where a shelter is provided for refrigerating equipment sited in the open air it shall have natural or forced ventilation For refrigeration systems installed outside in a location where a release of refrigerant can stagnate e g below ground then the installation shall c...

Page 8: ... The location of detectors shall be chosen in relation to the refrigerant and they shall be located where the refrigerant from the leak will concentrate The positioning of the detector shall be done with due consideration of local airflow patterns accounting for location sources of ventilation and louvers Consideration shall also be given to the possibility of mechanical damage or contamination At...

Page 9: ...s been permanently installed Even the anti vibration supports optional are shipped separately Make sure these items if required are delivered with the unit Use extreme caution when handling the unit to prevent damage to the control panel and the refrigerant pipes The unit must be lifted by inserting a hook in each of the four corners where the lifting holes are located see lifting instructions Dis...

Page 10: ...D EIMWC01405 18EN 10 32 2 3 Lifting instructions Single compressor unit Dual compressor unit Fig 1 Lifting instructions ...

Page 11: ... safety valves pressure switches which due to their importance are subject to periodic checks The safety valves outlet must be connected before operations For safety valve outlet pipe dimensions we recommend applying harmonized standards and EN13136 These units include the installation of two safety valves for each exchanger installed on an exchange tap which always maintains an active valve Thus ...

Page 12: ...alves on both heat exchangers with suitable dimensions to permit draining and inspection without having to completely drain the system To prevent damage to exchanger pipes install a mechanical filter that can be inspected on each input able to filter solid objects greater than 1 2 mm in size 2 7 2 Flow Switch A flow switch must be installed on the evaporator inlet pipe to ensure the correct water ...

Page 13: ...untreated water can result in corrosion erosion mud fouling and formation of algae Daikin Applied Europe is not liable for equipment damage or malfunction due to a lack of a water treatment or water not properly treated Use industrial glycol only Do not use automotive antifreeze Automotive antifreeze contains inhibitors which cause a plating on copper pipes Used glycol handling and disposal must b...

Page 14: ...lue indicated in the unit selection point results in an unacceptable pressure drop and excessive erosion of the pipes and vibrations that can cause breakage EWWD H DZ DRY COOLER VERSION Dry cooler version Model EWWD320DZXSA1 EWWH230DZXSA1 EWWD340DZXEA1 EWWH245DZXEA1 EWWD440DZXSA1 EWWH320DZXSA1 EWWD470DZXEA1 EWWH345DZXEA1 EWWD610DZXSA2 EWWH430DZXSA2 EWWD640DZXSA2 EWWH455DZXSA2 EWWD670DZXEA2 EWWH470...

Page 15: ...recommend adding glycol in proper proportion to the condenser cooling system The freezing temperature of the water glycol solution must be at least 6 C lower than the expected minimum ambient temperature 3 Insulate pipes especially chilled water ones to avoid condensation Damage caused by freezing is not covered by warranty therefore Daikin Applied Europe SpA cannot be held liable 2 12 Condenser p...

Page 16: ...rom emptying Fig 4 Condensation control scheme with well water 1 From the main condenser pump 2 Service valve 3 Direct acting water regulating valve 4 Configuration required when the regulating valve is not used 5 At Drain 2 13 Chilled water control sensor The water cooled EWWD H VZ unit is equipped with a microprocessor Be careful when working around the unit to avoid damaging cables and sensors ...

Page 17: ...he maximum absorbed current indicated on the unit label and in accordance with applicable electrical regulations Daikin Applied Europe S p A cannot be held liable for improper electrical connections The connections to the terminals must be made with copper terminals and cables The electrical connection must be made by qualified personnel There is a risk of electric shock The electrical panel must ...

Page 18: ... in any case must be compulsorily installed on the machine For better protection against freezing connecting the evaporator flow switch connect free contact or pump circuit breaker contact in series It is best to leave pump control to the microprocessor for better system management If an external system independently manages pump start follow this logic Evaporator water inlet turn on the pump 2 mi...

Page 19: ...nual which is part of the on board documentation delivered to the end user It is strongly recommended to perform installation and maintenance with other people In case of accidental injury or unease it is necessary to Keep calm Press the alarm button if present in the installation site Immediately contact any emergency personnel in the building or the call the Emergency Services Wait until emergen...

Page 20: ...et sensor for perfect water temperature regulation ΔT 0 3 C 3 6 Compressor Lead Lag The water cooled Daikin EWWD H _ DZ units alternate the compressor start sequence EWWD H _DZ dual compressor to balance the number of starts and operating hours Compressors are automatically alternated by the controller If the unit is in automatic mode the compressor with the lowest number of starts is started firs...

Page 21: ...hat the work area is properly ventilated before working on the refrigerant circuit or before welding brazing or soldering work ensure that the leak detection equipment being used is non sparking adequately sealed or intrinsically safe ensure that all maintenance staff have been instructed The following procedure should be followed before working on the refrigerant circuit remove refrigerant specif...

Page 22: ... HFO R1234ze E Pressure Temperature conversion table C kPa C kPa C kPa C kPa C kPa 15 20 4 150 23 369 43 731 62 1239 14 25 5 159 25 399 44 754 63 1271 13 30 6 169 26 414 45 776 64 1304 12 36 7 178 27 430 46 800 65 1337 11 42 8 188 28 445 47 823 66 1370 10 47 9 198 29 462 48 848 67 1405 9 53 10 208 30 478 49 872 68 1440 8 60 11 219 31 496 50 898 69 1475 7 66 12 230 32 513 51 923 70 1511 6 73 13 241...

Page 23: ...ng conditions The valve control logic prevents together with compressor load control machine operations beyond the allowed operation limits Normally the only maintenance required for this device is checking valve management via controller 4 2 3 Cooling circuit Cooling circuit maintenance consists of recording operating conditions and making sure the unit has the correct amount of refrigerant Recor...

Page 24: ...D EIMWC01405 18EN 24 32 Fig 7 P ID Mono and Dual compressor ...

Page 25: ...lectronic expansion valve 5 Starter valve 6 Check valve 7 Ball valve optional 8 Throttle valve optional 9 Liquid sight glass 10 Strainer 11 Economizer 12 Economizer electronic expansion valve 13 High pressure safety valve HP Pt 18 barg 14 Low pressure safety valve LP Pt 16 barg 15 Ball valve 16 Electronic expansion valve hot gas by pass optional PT Pressure transducer TT Temperature sensor ...

Page 26: ...rheating is between 8 and 15 C b Subcooling is between 4 and 6 C c The temperature difference between outlet water and evaporation is comprised between 0 5 and 4 C d The temperature difference between condensation and condenser outlet water is between 1 and 3 C 5 Make sure the indicator on the liquid sight glass is full If one of these parameters exceeds the indicated limits the machine may requir...

Page 27: ... the water tower on all units operating with a tower Make sure tower emptying is effective Follow a good maintenance program to prevent the formation of limescale deposits both in the tower in the condenser Take into account that the atmospheric air contains many contaminants that increase the need of proper water purification The use of untreated water can result in corrosion erosion fouling or t...

Page 28: ...on a O B Water quality analysis X C Clean condenser tubes X b E Seasonal Protection antifreeze X D Clean the flow switch X X IV Evaporator A Capacity evaluation a O B Water quality analysis X C Clean evaporator tubes X c E Seasonal Protection antifreeze X V Expansion valves A Function check X VI Unit A Capacity evaluation O B Refrigerant leak test X e C Vibration test X D General appearance Paint ...

Page 29: ...nd flows balanced at required conditions Electrical network Power cables connected to the electrical panel Power cables corrected connected with U V W for L1 L2 L3 respectively Wired pump starter and interlock Complete cooling tower fan electrical connections Electrical connections compliant with local electrical standards Miscellaneous Safety valve pipes complete Unit installed according to Daiki...

Page 30: ... instructions the refrigerant charge for each circuit 1 2 3 added during commissioning the total refrigerant charge 1 2 3 calculate the greenhouse gas emission with the following formula GWP value of the refrigerant x Total refrigerant charge in kg 1000 a Contains fluorinated greenhouse gases b Circuit number c Factory charge d Field charge e Refrigerant charge for each circuit according to the nu...

Page 31: ... local laws regarding disposal and if in scope with the national laws implementing the Directive 2012 19 EU RAEE Batteries and electrical components must be sent to specific waste collection centres Prevent refrigerant gases from polluting the environment using suitable pressure vessels and means to transfer the pressurized fluid This operation must be carried out by personnel trained in refrigera...

Page 32: ...pecifications contained herein are liable to change without notice Refer to the data communicated at the time of the order Daikin Applied Europe S p A cannot be held liable for direct or indirect damage in the broadest sense of the term arising from or related to the use and or interpretation of this publication All content is copyrighted by Daikin Applied Europe S p A DAIKIN APPLIED EUROPE S p A ...