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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
REV
01
Date
July 2018
Supersedes
D–EIMWC01405-18EN
D–EIMWC01405-18_01EN
D-EIMWC01405-18EN- 1/32
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Summary of Contents for Daikin EWWD320DZXSA1
- Page 1 Date July 2018 Supersedes D–EIMWC01405-18EN Installation, maintenance and operating manual D–EIMWC01405-18_01EN 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 D-EIMWC01405-18EN- 1/32...
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Page 2: Table Of Contents
Contents INTRODUCTION ..................................6 General Description .................................. 6 Application ....................................6 Information about R1234ze(E) ..............................6 Installation Safety ..................................7 1.4.1 Additional guidelines for safe use of R1234ze(E) for equipment located in the open air ..........7 1.4.2 Additional guidelines for safe use of R1234ze(E) for equipment located in a machinery room........7 INSTALLATION .................................. -
Page 3: Fig. 1 - Single Compressor Unit Component Descriptions
Fig. 1 - Single compressor unit component descriptions D-EIMWC01405-18EN- 3/32... -
Page 4: Fig. 2 - Dual Compressor Unit Component Descriptions
Low pressure Evaporator outlet Evaporator inlet Condenser outlet Condenser inlet Air purge Water drain Liquid line High Refrigerant Starter transducer water temperature water temperature water temperature water temperature shut-off valve pressure charge service valve sensor sensor sensor sensor safety valves valve Liquid line Economizer line... -
Page 5: Fig. 3-Description Of The Labels Applied To The Electric Panel
Fig. 3-Description 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 –... -
Page 6: Introduction
The cooling towers used with Daikin units 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 7: Installation Safety
Physical characteristics of refrigerant R1234ze (E) Safety Class PED Fluid Group Pratical limit (kg/m 0.061 ATEL/ ODL (kg/m 0.28 LFL (kg/m )@ 60°C 0.303 Vapour density @25°C, 101.3 kPa (kg/m 4.66 Molecular Mass 114.0 Normal Boling Point (°C) GWP (100 yr ITH) GWP (ARS 100 yr ITH) <1 Auto Ignition Temperature (°C) - Page 8 Refrigerant Auto ignition temperature Maximum surface temperature R1234ze 368 °C 294 °C Machinery rooms shall have doors opening outward and sufficient in number to ensure freedom for persons to escape in an emergency; the doors shall be tight fitting, self-closing and so designed that they can be opened from inside (antipanic system).
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Page 9: Installation
Machine returns are Ex factory Daikin Applied Europe S.p.A. Daikin Applied Europe S.p.A. cannot be held liable for any equipment damages incurred during transportation to the place of destination. The isolation of the evaporator corners, where the lifting holes are located, are shipped separately and must be assembled on site after the unit has been permanently installed. -
Page 10: Lifting Instructions
Lifting instructions Single compressor unit Dual compressor unit Fig. 1 – Lifting instructions D-EIMWC01405-18EN- 10/32... -
Page 11: Positioning And Assembly
Lifting instructions: 1) The equipment, slings, lifting accessories and handling procedures must meet local regulations and current standards. 2) To lift the machine, use only the holes on the heat exchangers. 3) Any lifting points should be used during handling. 4) Use lifting hooks with closing device exclusively. -
Page 12: Anchoring
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. Anchoring After positioning, the machine must be firmly anchored to the ground or foreseen metal structure to support the machine. -
Page 13: 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 14: Temperature Limits And Water Flow
Water flow rate in the condenser and evaporator higher than the rated value 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... -
Page 15: Evaporator Frost 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 16: Condensation Control With Well Water
Condenser 2.12.2 Condensation control with well water If ground water is used to cool the condenser, install a normally regulating control valve, direct drive, at condenser outlet. This regulating valve must ensure an adequate condensing pressure in the case where the water temperature entering the condenser is less than 20°... -
Page 17: Safety Valve
The unit must be connected with copper wire of adequate section, based on the 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. - Page 18 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, connect free contact or pump circuit breaker contact in series.
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Page 19: Operation
This Daikin unit represents a substantial investment and deserves the attention and care to keep this equipment in good working order. If the operator observes abnormal or unusual operating conditions, calling Daikin technical service is recommended. -
Page 20: Safeties For Each Cooling Compressor
(ΔT = ± 0.3° C). 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 first. If both compressors are in... -
Page 21: Maintenance
MAINTENANCE Personel working on the electrical or the refrigeration components must be authorized, trained and fully qualified. Maintenance and repair requiring the assistance of other skilled personnel should be carried out under the supervision of the person competent in the use of flammable refrigerants. Any person conducting servicing or maintenance on a system or associated parts of the equipment should be competent according to EN 13313. -
Page 22: Pressure/Temperature Table
Pressure/Temperature Table HFC-134a Pressure/Temperature Table °C °C °C °C 0,71 3,43 8,63 17,47 0,85 3,73 9,17 18,34 1,01 4,04 9,72 19,24 1,17 4,37 10,3 20,17 1,34 4,72 10,9 21,13 1,53 5,08 11,53 22,13 1,72 5,46 12,18 23,16 1,93 5,85 13,85 24,23 2,15 6,27... -
Page 23: Routine Maintenance
Routine maintenance 4.2.1 Check condenser performance It is important to periodically check the internal cleanliness of the copper tubes, in order to prevent deteriorated performance. This check can be carried out by checking that the difference between the condensation temperature and the condenser outlet water temperature on the microprocessor does not exceed 4°... -
Page 24: Fig. 7-P&Id Mono And Dual Compressor
Fig. 7-P&ID Mono and Dual compressor D-EIMWC01405-18EN- 24/32... -
Page 25: Fig. 8-P&Id Mono And Dual Compressor With Economizer
Fig. 8-P&ID Mono and Dual compressor with economizer Legend Item Description Centrifugal Compressor Flooded shell and tube evaporator Shell and tube condenser Electronic expansion valve Starter valve Check valve Ball valve (optional) Throttle valve (optional) Liquid sight glass Strainer Economizer Economizer electronic expansion valve High pressure safety valve - HP (Pt=18 barg) Low pressure safety valve - LP (Pt=16 barg) -
Page 26: Refrigerant Charge
4.2.4 Refrigerant charge The EWWD(H) DZ units are designed to operate with R134a refrigerant therefore DO NOT USE other refrigerants. When you add or remove refrigerant gas, always ensure correct water flow in the evaporator and the condenser to avoid freezing pipes. Freeze damage will void the warranty. -
Page 27: Cleaning And Storage
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 28: Maintenance Schedule
MAINTENANCE SCHEDULE The following table contains a set of maintenance procedures to be performed and their frequency. I. Compressor I. Compressor A. Analyse the compressor alarm log B. Check correct IGV operations C. Check electrical connection torque D. Implement humidity prevention measures (condensate) II. -
Page 29: Checks Before First Start Up
If the above conditions cannot be guaranteed, the customer is liable for the Daikin Applied commissioning approval. Site Engineer Name: _________________________________ Date: __________________________________ Signature: _________________________________ Daikin Applied Europe S.p.A. Servicesupport@daikinapplied.eu Notes: This list must be completed and sent to the local Daikin Service department at least two weeks before the start. D-EIMWC01405-18EN- 29/32... -
Page 30: Important Information On Used Refrigerant
IMPORTANT INFORMATION ON USED REFRIGERANT This product contains fluorinated greenhouse gases. Do not vent gases into the atmosphere. Refrigerant type: R134a GWP value (Global Warming Potential): 1430 The amount of refrigerant is indicated on the nameplate with the unit name. Periodical inspections for refrigerant leaks may be required depending on European or local legislation. -
Page 31: 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). Based on local regulations, a commissioning check and periodic checks may be required. Please verify and contact these organizations to also request authorization to start it up. - Page 32 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.
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