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Summary of Contents for Daikin EWAP800AJYNN
- Page 1 Installation, Operation and Maintenance Manual D – 508 C – 07/02 D – EN Air-cooled screw chillers EWAP 800-C18AJYNN EWAP 850-C18AJYNN/A 50Hz – Refrigerant: R-407C D – 508 C – 07/02 D – EN pag. 1/36...
- Page 2 D – 508 C – 07/02 D – EN pag. 2/36...
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Page 3: 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 4: 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 5: Handling And Lifting
Warning Check the instructions for use before operating the unit. Installation and maintenance must be performed only by qualified personnel with the required knowledge about chillers, local codes and regulations. Unit installation must be avoided in areas that could be considered dangerous for maintenance operations. -
Page 6: 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. Figure 3 Figure 4... -
Page 7: Water Piping
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. Water piping Due to the variety of piping practices, it is advisable to follow the recommendations of local authorities. -
Page 8: 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 9 Physical data EWAP-AJYNN R-407C Unit size Cooling capacity (1) 790,4 875,0 943,6 1026,1 1091,9 1158,0 Power input (1) 317,0 348,2 376,9 412,4 444,8 471,2 2,49 2,51 2,50 2,49 2,45 2,46 Single-screw compressors N° Refrigerant circuits N° Refrigerant charge Oil charge Min % of capacity reduction 12,5 12,5...
- Page 10 Electrical data EWAD-AJYNN R-407C 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) 1050 1054 1116 1120 1165 1265 Max unit current for wires sizing (5) 1002...
- Page 11 Physical data EWAP-AJYNN with option OPRN/OPLN R-407C Unit size Cooling capacity (1) 743,7 822,1 887,1 963,2 1025,0 1091,9 Power input (1) 351,8 385,1 415,6 455,2 491,5 523,0 2,11 2,13 2,13 2,12 2,09 2,09 Single-screw compressors N° Refrigerant circuits N° Refrigerant charge Oil charge Min % of capacity reduction 12,5...
- Page 12 Electrical data EWAP-AJYNN with option OPRN/OPLN R-407C 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) 1048 1050 1104 1106 1154...
- Page 13 Physical data EWAP-AJYNN/A R-407C Unit size Cooling capacity (1) 854,1 954,2 1027,8 1123,9 1195,7 1252,7 Power input (1) 288,2 321,1 350,7 386,3 418,4 428,8 2,96 2,97 2,93 2,91 2,86 2,92 Single-screw compressors N° Refrigerant circuits N° Refrigerant charge Oil charge Min % of capacity reduction 12,5 12,5...
- Page 14 Electrical data EWAP-AJYNN/A R-407C 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) 1051 1055 1125 1129 1172 1259 Max unit current for wires sizing (5) 1026...
- Page 15 Physical data EWAP-AJYNN/A with option OPRN/OPLN R-407C Unit size Cooling capacity (1) 818,2 911,3 981,1 1069,8 1137,3 1202,1 Power input (1) 311,5 346,9 378,6 418,0 453,6 463,4 2,63 2,63 2,59 2,56 2,51 2,59 Single-screw compressors N° Refrigerant circuits N° Refrigerant charge Oil charge Min % of capacity reduction 12,5...
- Page 16 Electrical data EWAP-AJYNN/A with option OPRN/OPLN R-407C 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) 1036 1038 1097 1100 1145...
- Page 17 Sound pressure levels EWAP-AJYNN and /A Standard Sound pressure level at 1 m from the unit in free field (rif. 2 x 10 unit size unit size 63 Hz 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz 78,5 79,0 80,5...
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Page 18: 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 19: Evaporator Pressure Drop
Evaporator Pressure Drop EWAP-AJYNN EWAP-AJYNN/A C16 – C17 – C18 – C16/A – C17/A – C18/A C13 – C14 – C15 – C13/A – C14/A – C15/A C12/A C10/A – C11/A – 900/A – 950/A C10/A – C11/A 900 – 950 – 850/A Flow rate (l/s) D –... - Page 20 Pressure Drop across Partial Heat Recovery Exchanger (Plate Exchanger) " ! $ # & % ) 8 2 4 0 2 1 6 " ! $ # & % ) 8 & 5 " 8 1 6 "...
- Page 21 Pressure Drop across Total Heat Recovery Exchanger EWAP-AJYNN EWAP-AJYNN/A 0F3RZHU 0F3RZHU 0F3RZHU 0F3RZHU 0F3RZHU 0F3RZHU 0F3RZHU 0F3RZHU 0F3RZHU 0F3RZHU ...
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Page 22: 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 23 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 24 (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.
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Page 25: 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 26 Heat Recovery Microprocessor Control 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 controller key pad. (see the picture below) HEAT RECOVERY OPERATION Key Pad...
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Page 27: Standard Controls
this microprocessor see the Specific manual supplied with the unit. The heat recovery mode is available only when there is a request for cooling while the system load can be balanced by adjusting the number of compressors running and their load condition. 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... -
Page 28: System Maintenance
Heat Recovery Microprocessor Set-up The units supplied with heat recovery condensers are equipped with an additional microprocessor (TC10, see electrical wiring diagram) for hot water temperature control, featuring two, three or four control stages depending on the number of heat exchangers installed on the unit (one stage per compressor). For information on how to set this microprocessor see the Specific manual supplied with the unit. -
Page 29: Electrical Control
the performance and efficiency of the unit. It is recommended that the compressor be checked with a vibration 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. -
Page 30: Lubricating Oils
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 31 Refrigerant Refrigerant charging These air-cooled screw chillers have been factory-charged with a full operating charge of refrigerant; however, there might be times when the unit must be recharged at the jobsite. Follow these recommendations when charging in the field. Refer to the unit operating charge found in the table of physical data, pages 9 through 15, according to the version of the unit, either chiller or heat recovery .
- Page 32 Preventive maintenance schedule SCHEDULE Operation TYPE OF OPERATION Six- Ref. No. Weekly Monthly Yearly Monthly Reading and recording of suction pressure Reading and recording of discharge pressure Reading and recording of supply voltage Reading and recording of current intensity Check the circuit for refrigerant charge and possible moisture by observing the liquid sight glass Check the suction temperature and the superheating Check setting and operation of safety devices...
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Page 33: Maintenance Shut-Down
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 34: Troubleshooting Chart
Check motor and replace if defective. Blown 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. See Capacity control section. - Page 35 Troubleshooting chart PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS Discharge shutoff valve partially closed. Open shutoff valve. 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 36 EWAP 800-C18AJYNN EWAP 850-C18AJYNN/A 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. Zandvoordestraat 300 B-8400 Ostend –...
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