Daikin EUW KZW1 Series Service Manual Download

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Functional Description

ESIE-0303

2–4

Part 2 – Functional Description

1.2

Operational Range: EUW5-24KZW1

Operational range

The illustration below shows the operational range of EUW5-24KZW1.

Legend

The table below describes abbreviations used in the operational range illustration above.

;;

°C

LWC

LWE

°C

Water

Glycol

Pattern/
Abbrevia-
tion

Description

LWE

Leaving Water Evaporator

LWC

Leaving Water Condenser

Option to produce evaporating leaving water temperature till -5°C

Option to produce evaporating leaving water temperature till -10°C

Summary of Contents for EUW KZW1 Series

Page 1: ......

Page 2: ......

Page 3: ...ZW1 1 17 1 10 Electrical Specifications EUW24KZW1 1 18 1 11 Electrical Specifications EUWL5 10KZW1 1 19 1 12 Electrical Specifications EUWL12 20KZW1 1 20 1 13 Electrical Specifications EUWL24KZW1 1 21...

Page 4: ...nge EUWL5 24KZW1 2 5 1 4 Compressor Working Status 2 6 1 5 Compressor Timers 2 7 1 6 Thermostat Control EUW5 24KZW1 and EUWL5 24KZW1 2 8 1 7 Pump Steering 2 9 1 8 Freeze up Control 2 10 2 The Digital...

Page 5: ...king the Power Supply and Fuses 3 17 4 Troubleshooting 4 1 What Is in This Chapter 3 19 4 2 Items to Be Checked 3 20 4 3 General Repair Procedures 3 22 4 4 Unlocking the Keyboard 3 23 4 5 Replacing th...

Page 6: ...Operation Data 2 1 What Is in This Chapter 4 15 2 2 Currents and Used Fuses 4 16 Part 5 Maintenance 1 Maintenance 1 1 What Is in This Chapter 5 3 1 2 Maintenance of the Main Parts 5 4 1 3 Maintenance...

Page 7: ...s Are designed for indoor installation Are used for cooling and heating applications Are available in seven standard sizes with nominal cooling capacities ranging from 13 kW to 65 kW EUWL5 24KZW1 The...

Page 8: ...Introduction ESIE 0303 vi 3 1 4 5...

Page 9: ...e Introduction This part contains an outline of all the relevant elements in the EUW5 24KZW1 and EUWL5 24KZW1 installation What is in this part This part contains the following chapters Chapter See pa...

Page 10: ...ESIE 0303 1 2 Part 1 System Outline 3 1 1 5...

Page 11: ...ifications EUW12 20KZW1 1 6 1 4 Technical Specifications EUW24KZW1 1 8 1 5 Technical Specifications EUWL5 10KZW1 1 10 1 6 Technical Specifications EUWL12 20KZW1 1 12 1 7 Technical Specifications EUWL2...

Page 12: ...in 19 l min Max 75 l min Min 31 l min Max 123 l min Min 40 l min Max 161 l min Nominal water flow 37 l min 62 l min 80 l min Nominal water pressure drop kPa kPa kPa Insulation material Polyethylene fo...

Page 13: ...vaporator water temperature from 5 C 5 C 10 C with ZH ZL option to 20 C and a leaving condenser water temperature from 20 C to 55 C Casing Material Polyester coated galvanised steel plate Colour Ivory...

Page 14: ...l min Min 62 l min Max 247 l min Min 80 l min Max 321 l min Nominal water flow 93 l min 123 l min 161 l min Nominal water pressure drop kPa kPa kPa Insulation material Polyethylene foam Condenser Typ...

Page 15: ...rator water temperature from 5 C 5 C 10 C with ZH ZL option to 20 C and a leaving condenser water temperature from 20 C to 55 C Casing Material Polyester coated galvanised steel plate Colour Ivory whi...

Page 16: ...m 1 311 l No x model Water flow rate Min 93 l min Max 373 l min Nominal water flow 186 l min Nominal water pressure drop kPa Insulation material Polyethylene foam Condenser Type Brazed plate heat exch...

Page 17: ...rs a leaving evaporator water temperature from 5 C 5 C 10 C with ZH ZL option to 20 C and a leaving condenser water temperature from 20 C to 55 C Material Polyester coated galvanised steel plate Colou...

Page 18: ...e Min 17 l min Max 69 l min Min 29 l min Max 115 l min Min 38 l min Max 153 l min Nominal water flow 35 l min 57 l min 77 l min Nominal water pressure drop kPa kPa kPa Insulation material Polyethylene...

Page 19: ...with the compressor discharge pressure Operation range The operation range covers a leaving evaporator water temperature from 5 C 5 C 10 C with ZH ZL option to 20 C Weight Machine weight 104 kg 138 kg...

Page 20: ...e Min 45 l min Max 179 l min Min 57 l min Max 229 l min Min 77 l min Max 307 l min Nominal water flow 89 l min 115 l min 154 l min Nominal water pressure drop kPa kPa kPa Insulation material Polyethyl...

Page 21: ...the compressor discharge pressure Operation range The operation range covers a leaving evaporator water temperature from 5 C 5 C 10 C with ZH ZL option to 20 C Weight Machine weight 149 kg 252 kg 265...

Page 22: ...em 1 31 l No x model Water flow rate Min 89 l min Max 358 l min Nominal water flow 179 l min Nominal water pressure drop kPa Insulation material Polyethylene foam Condenser Type Piping connections Eva...

Page 23: ...C 5 This temperature corresponds with the compressor discharge pressure Operation range The operation range covers a leaving evaporator water temperature from 5 C 5 C 10 C with ZH ZL option to 20 C Ca...

Page 24: ...essor control circuit pumps Operation range The operation range covers a leaving evaporator water temperature from 5 C 5 C 10 C with ZH ZL option to 20 C Model EUW5KZW1 EUW8KZW1 EUW10KZW1 Power supply...

Page 25: ...r control circuit pumps Operation range The operation range covers a leaving evaporator water temperature from 5 C 5 C 10 C with ZH ZL option to 20 C Model EUW12KZW1 EUW16KZW1 EUW20KZW1 Power supply P...

Page 26: ...nt air temperature 35 C Power input is total input Compressor control circuit pumps Operation range The operation range covers a leaving evaporator water temperature from 5 C 5 C 10 C with ZH ZL optio...

Page 27: ...ture corresponds with the compressor discharge pressure Model EUWL5KZW1 EUWL8KZW1 EUWL10KZW1 Power supply Phase 3N Frequency 50 Hz Voltage 400 V Voltage tolerance 10 Unit Starting current 49 A 79 A 10...

Page 28: ...ture corresponds with the compressor discharge pressure Model EUWL12KZW1 EUWL16KZW1 EUWL20KZW1 Power supply Phase 3N Frequency 50 Hz Voltage 400 V Voltage tolerance 10 Unit Starting current 129 A 93 A...

Page 29: ...re bubble 45 C 2 Liquid temperature 40 C 2 This temperature corresponds with the compressor discharge pressure Model EUWL24KZW1 Power supply Phase 3N Frequency 50 Hz Voltage 400 V Voltage tolerance 10...

Page 30: ...omponents The table below lists the components Required service space around the unit View A A No Component No Component 1 Compressor 11 Condenser entering water temperature sensor 2 Evaporator 12 Dig...

Page 31: ...ESIE 0303 General Outline Part 1 System Outline 1 23 3 1 4 5 9 Evaporator entering water temperature sensor 19 Flow switch pipe 10 Freeze up sensor No Component No Component...

Page 32: ...mponents The table below lists the components Required service space around the unit View A A No Component No Component 1 Compressor 11 Condenser entering water temperature sensor 2 Evaporator 12 Digi...

Page 33: ...ESIE 0303 General Outline Part 1 System Outline 1 25 3 1 4 5 9 Evaporator entering water temperature sensor 19 Flow switch pipe 10 Freeze up sensor No Component No Component...

Page 34: ...nents Required service space around the unit View A A Only for 5HP View A A Only for 8 10 12HP No Component No Component 1 Compressor 10 Freeze up sensor 2 Evaporator 11 Digital display controller 3 A...

Page 35: ...ervice space of the unit mm Components The table below lists the components Required service space around the unit View A A No Component No Component 1 Compressor 10 Freeze up sensor 2 Evaporator 11 D...

Page 36: ...General Outline ESIE 0303 1 28 Part 1 System Outline 3 1 1 4 5 8 Liquid stop valve 17 Main switch 9 Evaporator entering water temperature sensor 18 Flow switch pipe No Component No Component...

Page 37: ...mmon practice and is therefore not described Overview This chapter contains the following topics Topic See page 2 2 Functional Diagram Refrigeration and Water Circuit EUW5 8 10 12KZW1 1 30 2 3 Functio...

Page 38: ...gram Refrigeration and Water Circuit EUW5 8 10 12KZW1 Functional diagram The illustration below shows the functional diagram of the refrigeration and water circuit of EUW5 8 10 12KZW1 It is also appli...

Page 39: ...n R4T Freeze up protection Flange connection R5T Inlet water condenser temperature sensor Pinched pipe S33T Discharge temperature controller Spinned pipe S4LP Low pressure switch Field piping No Compo...

Page 40: ...tandard setting ON 21 6 bar 0 1 6 Strainer This strainer prevents dirt particles from entering the expansion valve 7 Water in and outlet connections The water in and outlet connections are made of gal...

Page 41: ...gram Refrigeration and Water Circuit EUW16 20 24KZW1 Functional diagram The illustration below shows the functional diagram of the refrigeration and water circuit of EUW16 20 24KZW1 It is also applica...

Page 42: ...switch Pinched pipe R3T Inlet water evaporator temperature sensor Spinned pipe R4T Freeze up protection Field piping R5T Inlet water condenser temperature sensor Q1D Discharge temperature controller Q...

Page 43: ...andard setting ON 21 6 bar 0 1 6 Strainer This strainer prevents dirt particles from entering the expansion valve 7 Water in and outlet connections The water in and outlet connections are made of galv...

Page 44: ...nctional Diagram Refrigeration and Water Circuit EUWL5 8 10 12KZW1 Functional diagram The illustration below shows the functional diagram of the refrigeration and water circuit of EUWL5 8 10 12KZW1 It...

Page 45: ...connection R4T Freeze up protection Flange connection Y1S Liquid solenoid valve Pinched pipe Q1D Discharge teperature controller Spinned pipe S4LP Low pressure switch Field piping No Component Functi...

Page 46: ...ing the expansion valve 7 Water in and outlet connections The water in and outlet connections are made of galvanized steel pipe British Standard Pipe BSP The pipes are not insulated If copper field pi...

Page 47: ...nctional Diagram Refrigeration and Water Circuit EUWL16 20 24KZW1 Functional diagram The illustration below shows the functional diagram of the refrigeration and water circuit of EUWL16 20 24KZW1 It i...

Page 48: ...k valve S1HP High pressure switch Flare connection S2HP High pressure switch Screw connection S4LP Low pressure switch Flange connection S5LP Low pressure switch Pinched pipe R3T Inlet water evaporato...

Page 49: ...ng the expansion valve 7 Water in and outlet connections The water in and outlet connections are made of galvanized steel pipe British Standard Pipe BSP The pipes are not insulated If copper field pip...

Page 50: ...Piping Layout ESIE 0303 1 42 Part 1 System Outline 3 1 1 4 5...

Page 51: ...Main functions of the EUW5 24KZW1 and EUW L 5 24KZW1 Switch box layout Wiring diagram Overview This chapter contains the following topics Topic See page 3 2 Main Functions of the EUW5 24KZW1 and EUWL5...

Page 52: ...A X9A Q1D Q2D Discharge protector X10A X11A K4S K55 Thermal overcurrent ID4 GND X63A X64A S4LP S5LP Low pressure switch ID5 GND X3M S9S Remote ON OFF Analog input B1 GND X71A 1 4 X60A R3T Evaporator i...

Page 53: ...ESIE 0303 Wiring Layout Part 1 System Outline 1 45 3 1 4 5 3 3 Switch Box Layout EUW5 12KZW1 Switch box layout The illustration below shows the switch box layout of EUW5 12KZW1 Detail 1 Detail 1...

Page 54: ...Power supply transformator 2 A2P I O PCB assembly 3 A1P Microchiller compact 4 K1M Magnetic contactor 5 __ Auxiliary contact for K1M K2M 6 K4S Overcurrent relay 7 __ Omegarail stopper 8 __ Omegarail 9...

Page 55: ...ESIE 0303 Wiring Layout Part 1 System Outline 1 47 3 1 4 5 3 4 Switch Box Layout EUW16 24KZW1 Switch box layout The illustration below shows the switch box layout of EUW16 24KZW1 Detail 1 Detail 1...

Page 56: ...ansformator 2 A2P I O PCB assembly 3 A1P Microchiller compact 4 __ Omegarail 5 __ Omegarail stopper 6 K2M Magnetic contactor 7 __ Auxiliary contact for K1M K2M 8 K1M Magnetic contactor 9 S12M Main swi...

Page 57: ...chiller types EUW5 24KZW1 and EUWL5 24KZW1 X11 X73A X50A X1A X19A X18A X28A X80A X79A X2A X4A X78A X15A X14A X13A X12A X23A X24A X21A X22A Y3R H6P H5P H4P H3P ESH H3P H4P H5P H6P Y3R L N ESH X1M X2M X...

Page 58: ...only for RC unit X17A K1M Compressor contactor coil of circuit 1 NC contact of K1M X18A Y2S Liquid solenoid valve only for RC unit X19A K2M Compressor contactor coil of circuit 2 NC contact of K2M X28...

Page 59: ...nd X81A E1H Crankcase heater 1 X82A E2H Crankcase heater 2 X1M H3P H4P H5P H6P Y3R Connection for field wiring X2M L N E5H Field connection for option OP10 Evap heater tape X3M G Go Option S9S S7S DON...

Page 60: ...Wiring Layout ESIE 0303 1 52 Part 1 System Outline 3 1 1 4 5...

Page 61: ...ESIE 0302 Wiring Layout Part 1 System Outline 1 53 3 6 Wiring Diagram Wiring diagram...

Page 62: ...Wiring Layout ESIE 0302 1 54 Part 1 System Outline...

Page 63: ...used as background information for troubleshooting This part also contains an extensive overview of the functioning of the controllers Knowledge of the controllers is indispensable and valuable infor...

Page 64: ...ESIE 0303 2 2 Part 2 Functional Description 3 1 2 5...

Page 65: ...tem Understanding these functions is vital when diagnosing a malfunction that is related to the functional control Overview This chapter contains the following topics Topic See page 1 2 Operational Ra...

Page 66: ...ange of EUW5 24KZW1 Legend The table below describes abbreviations used in the operational range illustration above C LWC LWE C ZL ZH Water Glycol Pattern Abbrevia tion Description LWE Leaving Water E...

Page 67: ...ange of EUWL5 24KZW1 Legend The table below describes abbreviations used in the operational range illustration above C LWC LWE C ZL ZH Water Glycol Pattern Abbrevia tion Description LWE Leaving Water...

Page 68: ...r Working Status Compressor working status The table below gives the conditions of the compressor status The compressor is ON when The compressor is OFF when The ON button is pressed AND Thermostat ON...

Page 69: ...mers of the compressor Timer Interval s Use Guard timer 60 The timer starts counting down when the scroll compressor is switched OFF During the countdown the compressor can not be restarted Anti recyc...

Page 70: ...escribes the step difference 12 C ON r1 Cooling set point default 12 C OFF Compressor 15 C Inlet water temperature evap C Step difference Step difference r3 Heating set point default 30 C 27 C 30 C r1...

Page 71: ...ithout a flow a control is installed to check if there is water flow in the system Pump lead lag time To control the pump lead 15 s and pump lag 0 timer the user has to define code v7 and v8 on the co...

Page 72: ...ins the characteristics of the freeze up protection for glycol option Characteristics Freeze up protection Control device Sensor Diagram name R4T Activation Outlet water temperature 4 C Result The cir...

Page 73: ...ntroduction This chapter contains information on the digital controller of EUW5 24KZW1 and EUWL5 24KZW1 Overview This chapter contains the following topics Topic See page 2 2 The Digital Controller 2...

Page 74: ...ameters press for 5 s To save a parameter modification To return to normal operation m To deactivate the buzzer in case of an alarm u To scroll up through the list of direct user parameters To increas...

Page 75: ...the settings to other micro controllers LEDs The table below contains an overview of the LEDs and their functions With pu The key is copied into the unit EEPROM after pressing both keys and then powe...

Page 76: ...s information on how to select start or stop or how to select cooling or heating mode Setting the temperature Use the u and d keys to adjust the water temperature If start stop set up is and cool heat...

Page 77: ...the following happens Stage Description 1 The o LED starts flashing indicating that the initialization cycle is started The c LED or the h LED lights up indicating whether the cooling or the heating m...

Page 78: ...rning Function Protects the unit Gives additional service information Description The unit is shut down The buzzer is activated The alarm is energized The display starts flashing alternately showing t...

Page 79: ...ype Default Value Limit values Step value EUW5 24KZW1 and EUWL5 24KZW1 d Measurement unit C or F User 0 C 0 or 1 1 r1 Cooling temperature set point Standard Direct 12 0 C 8 0 to 25 0 C 0 1 C ZL option...

Page 80: ...ttings see Reading or Adjusting Parameter Settings the Programming Procedure on page 2 19 p4 Activation period of the buzzer User 1 min 0 min buzzer disabled 1 14 min buzzer activation period 15 min b...

Page 81: ...ications are not saved Reading or adjusting To read or adjust parameter settings proceed as follows Do you want access to all parameters Start Enter the user password 22 with the u and d keys Press s...

Page 82: ...The Digital Controller EUW5 24KZW1 and EUWL5 24KZW1 ESIE 0303 2 20 Part 2 Functional Description 3 1 2 4 5...

Page 83: ...e input signals to control the output signals If the unit is not performing properly first check the input devices then the digital controllers and finally the output devices What is in this part This...

Page 84: ...ESIE 0303 3 2 Part 3 Troubleshooting 3 1 3 5...

Page 85: ...1 What Is in This Chapter Introduction The first step in a troubleshooting procedure is to check the inputs and outputs This chapter contains an overview of the inputs and outputs Overview This chapt...

Page 86: ...1 a1 Inlet water temperature sensor evaporator R4T X1 B2 GND e2 r6 Outlet water temperature sensor evapora tor R5T X1 B3 GND e3 Inlet water temperature sensor condenser Digital input Trans ducer K4S S...

Page 87: ...ESIE 0303 Inputs and Outputs Overview Part 3 Troubleshooting 3 5 3 3 4 5 1...

Page 88: ...Inputs and Outputs Overview ESIE 0303 3 6 Part 3 Troubleshooting 3 1 3 4 5...

Page 89: ...2 1 What Is in This Chapter Introduction The malfunction indication on the digital controller display helps you to find the cause of the problem This chapter describes the malfunction indications and...

Page 90: ...witch the discharge thermal protection or the over current protection of the compressor motor is activated Alarm Manual l1 The low pressure switch is activated Alarm Manual n1 The compressor requires...

Page 91: ...esult 1 Press m The buzzer stops 2 Find the cause of the alarm and correct it The system has been repaired 3 Reset the alarm manually by pressing the u and d key simultaneously for 5 s The controller...

Page 92: ...ar Manual software reset S1PH Switch ON OFF Low pressure switch l1 Low pressure ON Standard 2 0 bar 0 3 ZL ZH 1 5 bar 0 3 Manual software reset S4LP Switch ON OFF Outlet water temp too low freeze up p...

Page 93: ...erse phase has the highest priority Service information for alarm indications If the error is solved H1P and H2P keep their latest status They can only be reset by switching OFF ON the power from the...

Page 94: ...Malfunction Indications and Safeties Overview ESIE 0303 3 12 Part 3 Troubleshooting 3 1 3 4 5...

Page 95: ...duction This chapter contains information on how to measure and check the most important inputs and outputs Overview This chapter contains the following topics Topic See page 3 2 Checking the Temperat...

Page 96: ...ng the controller or an output device Temperature sensors The following sensors are connected to the controller R3T R4T R5T How to check To check the temperature sensors proceed as follows Step Action...

Page 97: ...1 29 109 30 105 70 102 20 25 10 10 10 00 9 90 79 1 76 1 71 1 68 28 103 80 100 40 97 16 26 9 73 9 63 9 52 80 1 71 1 66 1 62 27 98 63 95 47 92 41 27 9 38 9 28 9 18 81 1 66 1 62 1 57 26 93 75 90 80 87 93...

Page 98: ...PCB The block diagram below shows the digital input route from the transducer e g thermostat pressostat reverse phase etc to the PCB input Output route from PCB The output is generated by the PCB If...

Page 99: ...U gL gG Circuit Wiring code Type voltage Fuse code Main supply L1 L2 L3 N 3 phases 400 V AC F1U F2U F3U Control circuit PCBs TR1 prim 1 phase 230 V AC F4 TR1 sec 24 V AC F5 Fuses overcurrent EUW5KZW1...

Page 100: ...Checking the Inputs and Outputs ESIE 0303 3 18 Part 3 Troubleshooting 3 1 3 4 5...

Page 101: ...dea of where to look for malfunctions Furthermore the general procedures for refrigeration circuit and electrical circuit repair are described Not all repair procedures are described Some procedures a...

Page 102: ...Check the remote start stop set up and correct it if necessary In case of remote control check the field wiring One of the timers is still active Check the timers overview in this manual and wait unti...

Page 103: ...temp 43 C State of the condenser clean Pump operation Water flow blocked valves Flow switch operation Operation condition leaving condenser water 55 C Flow switch or pump contact Damaged flow switch I...

Page 104: ...s to comply with all relevant European and national regulations Step Action 1 Recover the refrigerant from the unit It is strictly forbidden to release refrigerant into the atmosphere during service o...

Page 105: ...ON Unlock the keyboard method 1 To unlock the keyboard according to method 1 proceed as follows Unlock the keyboard method 2 To unlock the keyboard according to method 2 proceed as follows Step Action...

Page 106: ...p Action 1 Remove the connections of the old controller 2 Remove the old controller 3 Install the new controller in the same way as the old controller 4 Reconnect the controller 5 Reprogram the contro...

Page 107: ...ter HC 5 Scroll using u or d to go to parameter H1 You can start initialization 6 Press s 7 Scroll using u or d to change the value to 06 8 Press s You see parameter H1 9 Use u or d to go to the other...

Page 108: ...Max cooling set point 25 C 25 C rv Factory Min heating set point 15 C 15 C rd Factory Max heating set point 50 C 50 C Code Parameter Function EUW5 12KZW1 and EUWL5 12KZW1 EUW16 24KZW1 and EUWL16 24KZW...

Page 109: ...ze alarm set point Standard 4 C r w ZL option 11 5 C ZH option 6 5 C a2 Factory Anti freeze alarm hysteresis 3 5 C a3 Factory Bypass time for anti freeze alarm 0 s a7 Factory Limit anti freeze alarm s...

Page 110: ...Cooling heating input 0 h7 User ON OFF input 0 h8 User Number of terminals 0 h9 User Keyboard lock up 1 ha User Serial address 1 hb User Remote control password 1 hv Factory Second set of parameters 1...

Page 111: ...CB Function of the dipswitches The table below describes the function of the dipswitches and pushbuttons on the PCB Step Action 1 Switch off the power 2 Remove the connections of the old PCB 3 Remove...

Page 112: ...Troubleshooting ESIE 0303 3 30 Part 3 Troubleshooting 3 1 3 4 5...

Page 113: ...e well known practices in service engineering This part contains a systematic approach on test run checks and test values which guarantees a high quality installation and operation of the units What i...

Page 114: ...ESIE 0303 4 2 Part 4 Commissioning and Test Run 3 1 4 5...

Page 115: ...ntains checks you have to carry out before every test run Overview This chapter contains the following topics Topic See page 1 2 General Checks 4 4 1 3 Water Piping Checks 4 5 1 4 Water Pressure Drop...

Page 116: ...2 The unit is properly supported and or has a proper foundation 3 The unit is installed horizontally with a deviation of maximum 1 4 Anti vibration pads are required 5 The operator has received the o...

Page 117: ...aps are installed at the low points of the water piping 10 Other parts of the water circuit are properly mounted and installed e g buffer tank expan sion tank 11 Vibration compensators are mounted at...

Page 118: ...ns ON Water or glycol temperature does not rise too fast when the unit turns OFF with EUWL24KZW1 311 l 89 l min 358 l min __ __ Evaporator Condenser Chiller type Minimum water volume Minimum water flo...

Page 119: ...Chloride ion mg Cl l 50 50 50 50 Corrosion Sulphate ion mg SO4 2 l 50 50 50 50 Corrosion M alkalinity pH 4 8 mg CaCO3 l 50 50 50 50 Scale Total hardness mg CaCO3 l 70 70 70 70 Scale Calcium hardness...

Page 120: ...condenser for EUW5 12KZW1 Warning Selecting a flow outside the curves can cause damage to or malfunction of the unit See also minimum and maximum allowed water flowrange See Technical Specifications...

Page 121: ...through condenser for EUW16 24KZW1 Warning Selecting a flow outside the curves can cause damage to or malfunction of the unit See also minimum and maximum allowed water flowrange See Technical Specif...

Page 122: ...1 Water pressure drop evaporator for EUWL16 24KZW1 The illustration below shows the water pressure drop through evaporator for EUWL16 24KZW1 10 0 0 20 30 40 50 60 70 80 90 100 110 120 20 40 60 80 100...

Page 123: ...ting a flow outside the curves can cause damage to or malfunction of the unit See also minimum and maximum allowed water flowrange See Technical Specifications EUWL5 10KZW1 on page 1 10 Technical Spec...

Page 124: ...Pressure ports before and after pump Water flow regulating valve Flow switch The illustration below shows the flow switch Components The table below list the main components of the flow switch for reg...

Page 125: ...st the potentiometer so that the red LED turns on 4 Adjust the potentiometer very carefully so that the red LED is switched off and the yellow LED is lit 5 Adjust the potentiometer very carefully so t...

Page 126: ...solator are installed 2 The main power supply voltage deviates less than 10 from the nominal value 3 The flow switch and pump contact are properly wired 4 The optional wiring for pump control is insta...

Page 127: ...n 4 15 3 4 5 1 Part 4 2 Test Run and Operation Data 2 1 What Is in This Chapter Introduction The table in this chapter contains an overview of the currents and used fuses Overview This chapter contain...

Page 128: ...Recommended fuses according to IEC standard 269 2 gL gG aM also admitted F1U F2U F3U gL gG Unit Nominal current Maximum current Fuses EUW5KZW1 6 6 A 13 A 3 x 16 gL gG EUW8KZW1 10 4 A 19 A 3 x 20 gL gG...

Page 129: ...e set up for operation at maximum capacity or to avoid damage The following chapters explain how to or when to maintain the EUW5 24KZW1 and EUWL5 24KZW1 It is also applicable on other types of Daikin...

Page 130: ...ESIE 0303 5 2 Part 5 Maintenance 3 1 5...

Page 131: ...refrigerant or lead to system contamination Avoid high gas concentrations While the heavy concentration of the refrigerant gas will raise from the floor level good ventilation is a must Avoid all con...

Page 132: ...s condition indicates the required frequency of cleaning and also whether water treatment is needed in the chilled water circuit Check the air plugs and drain plugs to prevent or detect water leakage...

Page 133: ...spect the bulb power head capillary connection no chaffing Inspect the equaliser line visually Inspect the feeler bulb suction pipe connection insulation Flow switch and pump interlock Follow the inst...

Page 134: ...trol Devices Preventive maintenance A program of scheduled maintenance should be set up and followed The items mentioned are to be used as a guide and must be used in combination with sound electrical...

Page 135: ...l Check the operation of the safety devices No operation can cause damage of the unit Inspection checks and actions Remarks Check the refrigerant circuit If the unit leaks contact your dealer Inspecti...

Page 136: ...1 5 5 Noise checks The table below contains the noise checks Inspection checks and actions Remarks Check for any abnormal noise Locate the noise producing section and search the cause If the cause of...

Page 137: ...18 EUW5 10KZW1 k 1 16 EUWL12 20KZW k 1 20 EUWL24KZW1 k 1 21 EUWL5 10KZW1 k 1 19 F Freeze up Control k 2 10 Functional Diagram Refrigeration and Water Circuit EUW16 20 24KZW1 k 1 33 EUW5 8 10 12KZW1 k...

Page 138: ...24KZW1 and EUWL5 24KZW1 k 3 29 S Safeties Overview k 3 10 Setting of the Flow Switch k 4 12 Settings Direct and User Parameters k 2 17 Start Stop k 2 14 Switch Box Layout EUW16 24KZW1 k 1 47 EUW5 12K...

Page 139: ...ESIE 0303 Index 3 3 4 5 1 Wiring Diagram k 1 53...

Page 140: ...ESIE 0303 4 Index 3 1 4 5...

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