Table of Contents
Related Manuals for Daikin EWWD-VZ
Summary of Contents for Daikin EWWD-VZ
- Page 1 Date December 2018 Supersedes D-EIMWC003H02-18_01EN Installation, maintenance and operating manual D-EIMWC003H02-18_02EN WATER-COOLED WATER CHILLERS WITH VARIABLE SPEED COMPRESSOR EWWD - VZ EWWH - VZ Original instruction in English...
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Page 2: Table Of Contents
Flow Switch ..............................13 2.7.3 Water treatment ............................14 Temperature limits and water flow ........................15 2.8.1 Operating limits EWWD-VZ ......................... 15 2.8.2 Operating limits EWWH-VZ ......................... 16 Minimum water content in the system ........................ 17 2.10 Evaporator freeze protection ..........................18 2.11... - Page 3 DURATION ................................. 33 Figure Index Figure 1-Description of the labels applied to the unit ........................ 4 Figure 2-Description of the labels applied to the electric panel ....................6 Figure 3-Lifting instructions ..............................11 Figure 4-Unit positioning ................................. 12 Figure 5-Condenser control scheme with cooling tower ......................18 Figure 6-Condensation control scheme with well water ......................
- Page 4 Figure 1-Description of the labels applied to the unit Single circuit unit D-EIMWC003H02-18_02EN - 4/34...
- Page 5 Double circuit unit Low pressure transducer Oil level Oil injection solenoid valve VVR solenoid valve circ.1 (3.1 VR) Oil flow sight glass VVR solenoid valve circ.1 (2.4 VR) Evaporator leaving water temperature sensor VVR solenoid valve circ.1 (1.8 VR) Evaporator entering water temperature sensor High pressure switch Air purge Discharge temperature sensor...
- Page 6 Figure 2-Description of the labels applied to the electric panel Single circuit unit Double circuit unit Identification of labels Manufacturer’s logo Lifting instructions Electricity warning Refrigerant Shutoff valve position W012 Symbol Wire tightness check Attention Closed Valve High Voltage Danger Attention Transportation Label UN 2857 Copper Cables...
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Page 7: Introduction
INTRODUCTION This manual provides information about the capabilities and standard procedures for all units in the series and is an important support document for qualified personnel but it is not intended to replace such personnel. All units are supplied complete with wiring diagrams and dimensional drawings that provide information about the size and weight of each model. -
Page 8: General Description
The cooling towers used with Daikin units with screw compressor must be selected for a wide scope of application, as described in the "Operating limits" section. From an energy savings point of view it is always preferable to keep the temperature difference between the hot circuit (condenser) and the cold circuit (evaporator) to a minimum. -
Page 9: Safety Installation
Safety installation The chiller has to be installed in open air or machinery room (location classification III). To ensure location classification III a mechanical vent on the secondary circuit(s) has to be installed. Local building codes and safety standards shall be followed; in absence of local codes and standards refer to EN 378-3:2016 as a guide. - Page 10 • 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 least one detector shall be installed in each machinery room or the occupied space being considered and/or at the lowest underground room for refrigerants heavier than air and at the highest point for refrigerants lighter than air.
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Page 11: Installation
Should damages be found upon receipt, immediately file a written complaint with the carrier. Machine returns are Ex-factory Daikin Applied Europe Spa. Daikin Applied Europe Spa. cannot be held liable for any equipment damages incurred during transportation to the place of destination. -
Page 12: Positioning And Assembly
The units are shipped with refrigerant valves closed to isolate such fluids during shipment. The valves must remain closed until such time as an authorized Daikin technician, after inspecting the machine and checked its installation, commissions the machine. -
Page 13: Flow Switch
Make sure that the water inlet and outlet connections agree with the dimensional drawing and the indications found on the connections. Incorrect water pipe installation could create machine malfunctions and/or reduce performance. NOTE When using a hydraulic connection shared with the heating system, make sure the temperature of the water flowing into the evaporator does not exceed the maximum allowed value. -
Page 14: Water Treatment
The use of 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. -
Page 15: Temperature Limits And Water Flow
Water flow rate higher than the maximum value indicated in the condenser and evaporator load loss diagram results in an unacceptable load loss and excessive erosion of the pipes and vibrations that can cause breakage. 2.8.1 Operating limits EWWD-VZ EWWD-VZ-SS EWWD-VZ-XS/PS D-EIMWC003H02-18_02EN - 15/34... -
Page 16: Operating Limits Ewwh-Vz
ELWT Evaporator outlet water temperature CLWT Condenser outlet water temperature Ref.1: standard unit (no options are required to operate in this area) Ref.2a: standard unit + opt. 08 (Brine). Limit for Propylene Glycol: ELWT = 0°C Ref.2b: standard unit + opt. 08 (Brine). Limit for Ethylene Glycol: ELWT = -3°C Ref.2c: standard unit + opt. -
Page 17: Minimum Water Content In The System
EWWH-VZ-SS Ref.1: standard unit (no options are required to operate in this area) Ref.2a: standard unit + opt. 08 (Brine). Limit for Propylene Glycol: ELWT = 0°C Ref.2b: standard unit + opt. 08 (Brine). Limit for Ethylene Glycol: ELWT = -6°C Ref.2c: standard unit + opt. -
Page 18: Evaporator Freeze Protection
6° C lower than the expected minimum ambient temperature. 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. -
Page 19: Chilled Water Control Sensor
The unit must be connected with in the proper section copper cables relative to the plate absorption values and in accordance with applicable electrical regulations. Daikin Applied Europe SpA cannot be held liable for improper electrical connections. The connections to the terminals must be made with copper terminals and cables. -
Page 20: Control Circuit
The flow switch can be supplied on request from Daikin Applied Europe and in any case must be compulsorily installed on the machine. For better protection against freezing, connecting the evaporator flow switch, contactor clean contact or pump circuit breaker in series. -
Page 21: Unit Description
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. Move the injured person to a warm place far from the unit and in place him or her in the recovery position. Immediately contact any emergency personnel in the building or the call the Emergency Services. -
Page 22: Oil Management System
Contact Daikin Service for approved oil. Liquid injection EWWH VZ series Daikin units do not require any delivery gas and thus oil cooling system if used within the rated operating range. In the case where the operating conditions exceed the standard conditions (High Temperature Kit), the compressor requires the oil cooling kit defined as "liquid injection". -
Page 23: Safeties For Each Refrigerant Circuit
control panel provides a wide range of data control and registration capacity options. It is important to have good familiarity with the control system for optimal machine operations. Please note that all units are also provided with the Control Manual. General door locking... -
Page 24: System Safeties
3.3.11 Compressor alternation The water-cooled Daikin VZ units alternate the compressor start sequence (VZ 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 first. If both compressors are in operation and one compressor must be turned off, the one with most hours is switched off 3.3.12... -
Page 25: Pressure/Temperature Table
purge circuit with inert gas (e.g. nitrogen); evacuate to a pressure of 0,3 (abs.) bar (or 0,03 MPa); purge again with inert gas (e.g. nitrogen); open the circuit. The area should be checked with an appropriate refrigerant detector prior to and during any hot work to make the technician aware of a potentially flammable atmosphere. -
Page 26: Routine Maintenance
-7 66 1511 -6 73 1548 -5 79 1585 -4 86 1003 1623 -3 94 1031 1662 -2 101 1059 1701 -1 109 1088 1741 0 117 1117 1782 1 125 1147 1823 2 133 1177 1865 3 141 1208 1908 Routine maintenance 4.3.1... - Page 27 Fig. 6 - Typical single circuit cooling circuit Fig. 7 - Typical dual circuit cooling circuit Legend Compressor Oil injection valve Delivery valve (optional) Oil injection solenoid valve Oil Condenser/Separator Safety exchanger valve D-EIMWC003H02-18_02EN - 27/34...
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Page 28: Refrigerant Charge
Liquid line valve Low Pressure safety valves Expansion valve with liquid indicator High pressure safety valves Flooded evaporator PZHH High pressure switch Suction valve (optional) Compressor electric motor Liquid injection valve (optional liquid injection) Suction temperature sensor Liquid injection solenoid valve (optional liquid injection) Delivery temperature sensor Jet pump feed valve Liquid temperature Sensor... -
Page 29: Seasonal Shutdown
The maintenance program must be continuous from first system start: Full inspection must be made after three or four weeks of normal operation and continue regularly. Daikin Applied Europe offers a variety of maintenance services through its local Daikin service departments and through a worldwide service organization and can adapt their services to the customer's needs. - Page 30 A. Operating check Legend: O = Carried out by customer staff X = Carried out by Daikin rappresentative technical staff ) Oil Analysis have to be performed each year or every 5000 hours of operation, whichever shall first occur. ) Change the oil filter if Δp>2 bar ) Check water temperature entering and leaving the condenser ) If the approach is >...
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Page 31: Precommissioning Check List
Unit Model No.(s): ___________________________________________________________________ Daikin Serial Unit No.: ________________________________________________________________ Warning: Under no condition should the unit(s) be started prior to the authorized start-up by Daikin Applied. Failure to follow this warning may result in serious equipment damage and will negate the Warranty. -
Page 32: Important Information Regarding The Refrigerant Used
IMPORTANT INFORMATION REGARDING THE REFRIGERANT USED This product contains fluorinated greenhouse gases. Do not vent gases into the atmosphere. Refrigerant type: R134a / R1234ze GWP(1) value: 1430 / 7 (1)GWP = global warming potential 8.1 Factory and Field charged units instructions The refrigerant system will be charged with fluorinated greenhouse gases, and the factory charge(s) are recordered on the label, shown below, which is adhered inside the electrical panel. -
Page 33: Periodic Checks And Commissioning Of Pressure Vessels
PERIODIC CHECKS AND COMMISSIONING OF PRESSURE VESSELS The units described in this manual fall under category IV of the classification determined by the European Directive 2014/68 / EU (PED). For chillers in that category some local regulations require a periodic inspection by an authorized agency. Please verify and contact these organizations to also request authorization to start it up. - Page 34 The present publication is drawn up by of information only and does not constitute an offer binding upon Daikin Applied Europe S.p.A.Daikin Applied Europe S.p.A. has compiled the content to the best of their knowledge. Refer to the data communicated at the time of the order. All the data and specifications contained herein are liable to change without notice.