Daikin EWAD 650-C18BJYNN Installation, Operation And Maintenance Manual
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Daikin EWAD 650-C18BJYNN Installation, Operation And Maintenance Manual

Daikin EWAD 650-C18BJYNN Installation, Operation And Maintenance Manual

Air-cooled screw chillers
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Installation, Operation and Maintenance Manual
D – KIMAC00411-09EN
Air-cooled screw chillers
EWAD 650-C18BJYNN
EWAD 550-C12BJYNN/Q
EWAD 650-C21BJYNN/A
EWAD 600-C10BJYNN/Z
50Hz – Refrigerant: R-134a
Original Instructions

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Summary of Contents for Daikin EWAD 650-C18BJYNN

  • Page 1 Installation, Operation and Maintenance Manual D – KIMAC00411-09EN Air-cooled screw chillers EWAD 650-C18BJYNN EWAD 550-C12BJYNN/Q EWAD 650-C21BJYNN/A EWAD 600-C10BJYNN/Z 50Hz – Refrigerant: R-134a Original Instructions...
  • Page 2 This Manual is a technical aid and does not represent a binding offer for Daikin. Daikin has drawn up this Manual to the best of its knowledge. The content cannot be held as explicitly or implicitly guaranteed as complete, precise or reliable.
  • Page 3 4 compressors unit Label Identification 1 – Unit nameplate data 6 – Water circuit filling warning 2 – Lifting instructions 7 – Electrical hazard symbol 3 – Non flammable gas symbol 8 – Hazardous Voltage warning 4 – Manufacturer’s logo 9 –...

  • Page 4: General Description

    Introduction General description Each unit is completely assembled, wired, evacuated, charged, tested, and ready for installation. The main components are air-cooled condensers with integral sub-cooler sections, accessible semi-hermetic single-screw compressors, shell-and-tube evaporators, shell-and-tube water heat recovery condensers (optional), oil separators, complete refrigerant piping and electrical panel (including control and power sections). Liquid line components are shut-off valves, charging valves, filter-dryers, sight-glass/moisture indicators, electronic expansion valves, liquid receivers (only with total heat recovery option).

  • Page 5: Installation

    DAIKIN’s responsibility. Responsibilities DAIKIN declines all present and future responsibilities referred to injuries to people and damages to things and to the unit, caused by operator's negligence, failure to respect installation/maintenance data from this manual, failure to respect the current regulations regarding the safety of both the equipment and qualified personnel in charge of the installation and the maintenance.

  • Page 6: Handling And Lifting

    It is 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 move the injured person in a warm place far from the unit and in rest position contact immediately emergency rescue personnel of the building or if the Health Emergency Service wait without leaving the injured person alone until the rescue operators come give all necessary information to the the rescue operators...

  • Page 7: Space Requirements

    When two or more units are positioned side by side it is recommended that the condenser coils of each unit be at least at 3600 mm apart (figure 6). For different installation solutions, consult DAIKIN technicians. D - KIMAC00411-09EN - 7/52...

  • Page 8: Water Piping

    Picture 3 Picture 4 Picture 6 Picture 5 Acoustic protection When the noise level must meet special requirements, it will be necessary to pay the maximum attention to ensure perfect insulation of the unit from the support base by applying appropriate vibration-dampening devices, applying vibration-dampening mounts on the water pipes and on the electrical connections.

  • Page 9: Flow Switch

    It prevents the unit from shutting down due to high condensing pressure. A flow switch is available from DAIKIN; this is a "paddle" type switch which may be adapted to any pipe size from 5" (127 mm) to 8" (203 mm) nominal.
  • Page 10 Table 2 – Operating limits – EWAD-BJYNN - EWAD-BJYNN/Q EWAD-BJYNN EWAD-BJYNN with Option with Option Unit version BJYNN BJYNN/Q OPRN OPLN Max ambient temperature ° C +40 (1) Min ambient temperature ° C +10 (2) +10 (2) +10 (2) -10 (3) Max leaving evaporator water temperature °...
  • Page 11 Physical data EWAD-BJYNN R-134a Unit size Cooling capacity (1) Power input (1) 2,94 3,01 3,01 3,03 3,15 Screw compressors N° Refrigerant circuits N° Refrigerant charge R-134a Oil charge Min % of capacity reduction 12,5 12,5 12,5 12,5 12,5 Condenser fans No.
  • Page 12 Physical data EWAD-BJYNN R-134a Unit size Note (2) Cooling capacity (1) 1322 1520 1641 1772 Power input (1) 3,14 3,02 3,05 3,15 Screw compressors N° Refrigerant circuits N° Refrigerant charge R-134a Oil charge Min % of capacity reduction 6,25 6,25 6,25 Condenser fans No.
  • Page 13 Physical data EWAD-BJYNN with option OPRN R-134a Unit size Cooling capacity (1) Power input (1) 2,58 2,68 2,71 2,71 2,84 Screw compressors N° Refrigerant circuits N° Refrigerant charge R-134a Oil charge Min % of capacity reduction 12,5 12,5 12,5 12,5 12,5 Condenser fans No.
  • Page 14 Physical data EWAD-BJYNN with option OPRN R-134a Unit size Note (2) Cooling capacity (1) 1296 1457 1553 1735 Power input (1) 2,84 2,67 2,71 2,84 Screw compressors N° Refrigerant circuits N° Refrigerant charge R-134a Oil charge Min % of capacity reduction 6,25 6,25 6,25...
  • Page 15 Physical data EWAD-BJYNN with option OPLN R-134a Unit size Cooling capacity (1) Power input (1) 2,58 2,68 2,71 2,71 2,84 Screw compressors N° Refrigerant circuits N° Refrigerant charge R-134a Oil charge Min % of capacity reduction 12,5 12,5 12,5 12,5 12,5 Condenser fans No.
  • Page 16 Physical data EWAD-BJYNN with option OPLN R-134a Unit size Note (2) Cooling capacity (1) 1296 1457 1553 1735 Power input (1) 2,84 2,67 2,71 2,84 Screw compressors N° Refrigerant circuits N° Refrigerant charge R-134a Oil charge Min % of capacity reduction 6,25 6,25 6,25...
  • Page 17 Physical data EWAD-BJYNN/Q R-134a Unit size Cooling capacity (1) Power input (1) 2,35 2,43 2,48 2,48 2,47 2,39 Screw compressors N° Refrigerant circuits N° Refrigerant charge R-134a Oil charge Min % of capacity reduction 12,5 12,5 12,5 12,5 12,5 Condenser fans No.
  • Page 18 Electrical data EWAD-BJYNN/Q R-134a Unit size Standard voltage (1) 400 V – 3f – 50 Hz Nominal unit current (2) Max compressor current (3) Fans current Max unit current (3) Max unit inrush current (4) Max unit current for wires sizing (5) Unit size Standard voltage (1) 400 V –...
  • Page 19 Physical data EWAD-BJYNN/A R-134a Unit size Cooling capacity (1) Power input (1) 3,27 3,33 3,38 3,36 3,37 3,57 Screw compressors N° Refrigerant circuits N° Refrigerant charge R-134a Oil charge Min % of capacity reduction 12,5 12,5 12,5 12,5 12,5 12,5 Condenser fans No.
  • Page 20 Physical data EWAD-BJYNN/A R-134a Unit size Cooling capacity (1) 1430 1557 1710 1806 1920 Power input (1) 3,70 3,27 3,35 3,37 3,46 Screw compressors N° Refrigerant circuits N° Refrigerant charge R-134a Oil charge Min % of capacity reduction 6,25 6,25 6,25 6,25 Condenser fans...
  • Page 21 Physical data EWAD-BJYNN/A with option OPRN R-134a Unit size Cooling capacity (1) Power input (1) 2,97 3,02 3,03 3,04 3,08 3,30 Screw compressors N° Refrigerant circuits N° Refrigerant charge R-134a Oil charge Min % of capacity reduction 12,5 12,5 12,5 12,5 12,5 12,5...
  • Page 22 Physical data EWAD-BJYNN/A with option OPRN R-134a Unit size Cooling capacity (1) 1401 1512 1618 1762 1871 Power input (1) 3,44 3,02 2,99 3,08 3,15 Screw compressors N° Refrigerant circuits N° Refrigerant charge R-134a Oil charge Min % of capacity reduction 6,25 6,25 6,25...
  • Page 23 Physical data EWAD-BJYNN/A with option OPLN R-134a Unit size Cooling capacity (1) Power input (1) 2,97 3,02 3,03 3,04 3,08 3,30 Screw compressors N° Refrigerant circuits N° Refrigerant charge R-134a Oil charge Min % of capacity reduction 12,5 12,5 12,5 12,5 12,5 12,5...
  • Page 24 Physical data EWAD-BJYNN/A with option OPLN R-134a Unit size Cooling capacity (1) 1401 1512 1618 1762 1871 Power input (1) 3,44 3,02 2,99 3,08 3,15 Screw compressors N° Refrigerant circuits N° Refrigerant charge R-134a Oil charge Min % of capacity reduction 6,25 6,25 6,25...
  • Page 25 Physical data EWAD-BJYNN/Z R-134a Unit size Cooling capacity (1) 1013 Power input (1) 2,64 2,66 2,53 2,61 2,72 2,64 2,80 Screw compressors Refrigerant circuits Refrigerant charge R-134a Oil charge Min % of capacity reduction 12,5 12,5 12,5 Condenser fans No. of fans / nominal power fan 12/0,3 13/0,3 14/0,3...
  • Page 26 Sound pressure level EWAD-BJYNN and EWAD-BJYNN/A Sound pressure level at 1 m from the unit in free field ( ref. 2 x 10 EWAD-BJYNN EWAD-BJYNN/A 1000 2000 4000 8000 77,0 77,5 79,0 75,0 74,5 72,0 63,0 54,5 79,0 77,0 77,5 79,0 75,0 74,5...
  • Page 27 Sound pressure level EWAD-BJYNN + option OPLN and EWAD-BJYNN/A + option OPLN Sound pressure level at 1 m from the unit in free field ( ref. 2 x 10 EWAD-BJYNN EWAD-BJYNN/A 1000 2000 4000 8000 + option OPLN + option OPLN 75,0 72,5 72,0...

  • Page 28: Relief Valves

    Relief Valves As a safety precaution and to meet code requirements, each chiller is equipped with pressure relief valves located on the condenser coil, evaporator, heat recovery condenser (if supplied) and liquid receiver, for the purpose of releasing excessive refrigerant pressure (caused by equipment malfunctioning, fire etc.) to the atmosphere.
  • Page 29 Table for matching unit size Unit size BJYNN BJYNN/A BJYNN/Q BJYNN/Z Note: Unit size matching system used for evaporator pressure drop curves and pressure drop curves for partial and total heat recovery. D - KIMAC00411-09EN - 29/52...

  • Page 30: Evaporator Pressure Drop

    Evaporator pressure drop EWAD-BJYNN - EWAD-BJYNN/Q EWAD-BJYNN/A 520.4 495.4 392.3 273.2 426.4 355.4 - 460.4 312.3-327.3-344.3-358.3 M - N - O - P 258.2 241.2 240.3 260.3 - 279.3 - 296.3 I - K - L 178.2 - 196.2 B - C 212.2 - 229.2 D - E 163.2...
  • Page 31 Evaporator pressure drop EWAD-BJYNN/Z 260.3 - 279.3 - 296.3 I - K - L 240.3 163.2 178.2 - 196.2 B - C 1 0 0 8 0 9 0 1 0 0 2 0 0 Portata acqua ( l/s) Water flow rate (l/s) D - KIMAC00411-09EN - 31/52...
  • Page 32 Pressure drop across partial heat recovery exchanger (plate exchanger) EWAD-BJYNN - EWAD-BJYNN/Q EWAD-BJYNN/A - EWAD-BJYNN/Z 460.4 – 495.4 – 520.4 S - T - U A L S E 4 6 0 . 4 - A L S E 4 9 5 . 2 - A L S E 5 2 0 . 4 426.4 A L S E 4 2 6 .
  • Page 33 Pressure drop across total heat recovery exchanger EWAD-BJYNN - EWAD-BJYNN/Q EWAD-BJYNN/A - EWAD-BJYNN/Z S - T - U 460.4 – 495.4 – 520.4 A L S E 4 6 0 . 4 - A L S E 4 9 5 . 4 - A L S E 5 2 0 . 4 426.4 A L S E 4 2 6 .

  • Page 34: Operation

    Thermometer wells, thermometers, gauges, control wells, controls, etc., installed A minimum 60% of system capacity is available for tests and control adjustments Note: This check list must be completed and sent to the local DAIKIN service center two weeks prior to start-up. Operation...

  • Page 35: Refrigerant Circuit

    Before leaving the condensing section, the liquid refrigerant is led into the sub-cooler where it is cooled below its saturation temperature, thus compensating for the pressure drop along the liquid line and improving the capacity of the evaporator. After leaving the sub-cooler, the liquid refrigerant enters the liquid receiver, where the exceeding charge is accumulated during the “cooling mode”...
  • Page 36 Controller D - KIMAC00411-09EN - 36/52...
  • Page 37 (e.g. temperatures and pressures of fluids such as water and refrigerant). This control device maximizes the DAIKIN chiller energy efficiency and reliability. It uses sophisticated software with predictive logic to select the most energy-efficient combination of compressor, electronic expansion valve and condenser fan to keep stable operating conditions and maximize energy efficiency.

  • Page 38: Safety System

    Safety - system Phase monitor Freeze protection One evaporator flow input to controller (stops the unit) Remote on/off input. Regulation type Proportional + integral + derivative regulation with feed-back input taken from the temperature sensor at the evaporator water outlet. Condensation The condensation control can be based on temperature or on pressure.
  • Page 39 All the units equipped with heat recovery water condensers have an additional “microprocessor control” to manage the heat recovery function of the unit. The microprocessor is installed inside the main control box, below the key pad. (see the picture below) HEAT RECOVERY OPERATION Key Pad...
  • Page 40 To run the unit in heat recovery mode follow the points listed below: 1) Verify that the installation of the water flow switch was done by the installer and check the electrical connection at M3.426 and M3.427 terminal blocks inside the electrical panel 2) Check that the microprocessor sensor is fitted in the pocket well of the water return common header (done by the installer) 3) Check the set point of the return water temperature on the display of the microprocessor “TC10”...

  • Page 41: System Maintenance

    ITEM Description Setpoint Inlet water temperature set point Max 50 Operating Mode Differential Set point Authority 20” System Maintenance General To ensure proper operation at peak capacity and to avoid damage to system components, a periodic inspections program should be set up and followed. The information given below is intended as a guide to be used during inspection and must be combined with observation of compressor sound and good electrical practices to ensure trouble-free performance.
  • Page 42 analyser at or shortly after start-up and again on an annual basis. When performing the test, the load should be maintained as close to the rated load as possible. The vibration analysis provides a fingerprint of the compressor and, if performed on a routinely basis, can give a warning on impending problems. The compressor is supplied with a cartridge oil filter.
  • Page 43 Evaporator The units are supplied with optimized counter-flow evaporator, single refrigerant pass. It is direct expansion type (2 evaporators for units with 4 compressors), with refrigerant inside the tubes and water outside (shell side), carbon steel tube sheets, and straight copper tubes, that are spirally wound internally for higher efficiency, expanded on the tube plates.
  • Page 44 No maintenance is normally required except for occasional removal of dirt and debris from the outside surface of the fins. DAIKIN recommends the use of foaming coil cleaners available at air conditioning supply outlets. Use caution when selecting such cleaners as some may contain potentially harmful chemical. Care should be taken not to damage the fins during cleaning.

  • Page 45: Preventive Maintenance Schedule

    In case moisture is detected in the moisture indicator, the system must be evacuated to eliminate the cause of trouble. After the problem has been solved, the system must be dried by making an almost perfect vacuum. For this purpose, a displacement vacuum pump should be used. When the system has been opened for extensive repairs, such as an overhaul, the following evacuation procedure is advised: Evacuate the refrigerant system by means of a vacuum pump until the value 200 Pa (1,5 mm Hg) is reached.

  • Page 46: Startup And Shutdown

    Start-up and shut-down Start-up Verify that all shut-off valves are open. − − Prior to starting the unit, open the water circulation pump(s) and regulate the flow through the evaporator and through the heat recovery condensers (if supplied) in accordance with the working conditions of the unit.

  • Page 47: Service & Replacement Parts

    Representative. The order should include part name, part number, model number and serial number of the unit involved. After DAIKIN inspection of the returned part, if the failure is due to faulty material or workmanship, credit will be issued on the customer's purchase order. All defective parts shall be returned to DAIKIN factory, transportation charges prepaid.

  • Page 48: Troubleshooting Chart

    Defective or grounded wiring in the motor. Check motor and replace if defective. High discharge pressure. See corrective steps for high discharge pressure. Compressor Compressor internal problem. Contact DAIKIN. noisy or Oil injection not adequate. Contact DAIKIN. vibrating Compressor will Defective capacity control.
  • Page 49 Troubleshooting chart PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS High discharge Discharge shutoff valve partially closed. Open shutoff valve. pressure. Non condensable in the system. Purge the non condensable from the condenser coil after shutdown. Fans not running. Check fan fuses and electrical circuits. Fan control out of adjustment.
  • Page 50 Periodic obligatory checks and starting up of appliances under pressure The units are included in category IV of the classification according to European Directive PED 97/23/EC. For chillers belonging to this category, some local regulations require a periodic inspection by an authorized agency. Please check with your local requirements.
  • Page 51 Important information regarding the refrigerant used This product contains fluorinated greenhouse gases covered by the Kyoto Protocol. Do not vent gases into the atmosphere. Refrigerant type: R134a GWP(1) value: 1300 (1)GWP = global warming potential The refrigerant quantity is indicated on the unit name plate. Periodical inspections for refrigerant leaks may be required depending on European or local legislation.
  • Page 52 EWAD 600-C10BJYNN/Z Daikin units comply with the European regulations that guarantee the safety of the product. Daikin Europe N.V. is participating in the EUROVENT Certification Programme. Products are as listed in the EUROVENT Directory of Certified Products. DAIKIN EUROPE N.V.

This manual is also suitable for:

Ewad 550-c12bjynn/qEwad 650-c21bjynn/aEwad 600-c10bjynn/z

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