Daikin EWYT CZ Series Operating Manual Download

Page: 1 / 35

REV

Date

08/2022

Supersedes

D-EOMHP01405_03EN

Air to water heat pump units with scroll compressors

EWYT~CZ / EWAT~CZ

Original Instruction

Operating Manual

D-EOMHP01405-21_04EN

Summary of Contents for EWYT CZ Series

Page 1: ...REV 04 Date 08 2022 Supersedes D EOMHP01405_03EN Air to water heat pump units with scroll compressors EWYT CZ EWAT CZ Original Instruction Operating Manual D EOMHP01405 21_04EN...

Page 2: ...ameter 14 3 7 Pumps and Variable Flow 14 3 7 1 Fixed Speed 14 3 7 2 Variable Primary Flow VPF 14 3 7 3 DeltaT 14 3 8 Network Control 15 3 9 Thermostatic Control 16 3 10 External Alarm 17 3 11 Unit Cap...

Page 3: ...2 Demand Limit V vs Capacity Limit 18 Graph 3 Outside Ambient Temperature vs Active Setpoint Cooling mode left Heating mode right 19 Graph 4 External signal 0 10V vs Active Setpoint Cooling mode left...

Page 4: ...UC requires to be accessed frequently the installation of a remote interface is strongly recommended LCD display of the unit controller may be damaged by extremely low temperatures see chapter 2 4 For...

Page 5: ...rge Superheat MOP Maximum operating pressure DT Discharge Temperature SSH Suction Super Heat EEWT Evaporator Entering Water Temperature ST Suction Temperature ELWT Evaporator Leaving Water Temperature...

Page 6: ...mand to make them permanent This action can be done via the Application Save command The controller automatically makes an Application Save after a change of value of one of following parameters Param...

Page 7: ...f g 4 The interface has a multi level structure divided as follows Main Menu Parameters Sub Parameters Page 1 Parameter 1 00 Sub Parameter 1 0 0 Sub Parameter 1 0 XX Parameter 1 XX Sub Parameter 1 XX...

Page 8: ...tand by button 3 1 1 Icons Description Icons provide an indication about current unit status ICON Description LED ON LED OFF LED BLINKING LED Functioning mode Chiller Running in cooling mode LED Funct...

Page 9: ...ff 2 Scheduler Time programmed On Off 3 Network On Off optional with Accessory EKRSCBMS 4 Unit On Off Switch 3 3 1 Keypad On Off Keypad On Off allows to enable or disable the unit from local controlle...

Page 10: ...W 1 17 1 6 Time 4 W 1 17 1 7 Value 4 W 1 17 02 Wednesday Wednesday 17 2 0 Time 1 W 1 17 2 1 Value 1 W 1 17 2 2 Time 2 W 1 17 2 3 Value 2 W 1 17 2 4 Time 3 W 1 17 2 5 Value 3 W 1 17 2 6 Time 4 W 1 17 2...

Page 11: ...24 the HMI will display An Minute as string and the Value related to Time is set for all hours of the associated day If Minute 60 the HMI will display Hour An as string and the Value related to Time...

Page 12: ...int value defined by the user and displayed in the main page The unit can work with a primary or a secondary setpoint that can be managed as indicated below 1 Keypad selection Double Setpoint digital...

Page 13: ...in cooling mode with the Cool LWT as the Active Setpoint HEAT The unit will work in heat pump mode with the Heat LWT as the Active Setpoint 3 Cool Heat with glycol Same behavior of Cool Heat mode but...

Page 14: ...2 3 Standby Speed Unit controller switches the pump frequency on the basis of 1 Actual unit capacity 2 Double Speed digital input state If there are no active compressors Unit Capacity 0 pump speed is...

Page 15: ...across the Evaporator R 1 12 Parameter K 1 10 This value scales the PI algorithm parameters to obtain a faster response W 1 13 Setpoint DeltaT 0 10 Evaporator Water Temperature difference setpoint W 1...

Page 16: ...ther compressors stop Controlled Temperature Setpoint Stage Dn DT Controlled Temperature Setpoint Stage Dn DT A qualitative example of compressors start up sequence in cool mode operation is shown in...

Page 17: ...n Pumpdown configuration generates an alarm in the controller and performs a pumpdown procedure to stop the unit The web HMI path for the External Alarm configuration is Commissioning Configuration Op...

Page 18: ...n allows to control unit power consumption taking current drawn below a specific limit In order to activate the function Current Limit the user can set a Current Limit Setpoint lower than the Default...

Page 19: ...accessible from the Setpoint Reset menu go to the parameter group number 20 Setpoint Reset according to the following table Menu Parameter Range Description R W 20 01 Max Reset 0 10 C Max Reset setpo...

Page 20: ...Setpoint Reset by DT When the DT is selected as Setpoint Reset option the LWT active setpoint AS is calculated applying a correction based on the temperature difference T between the leaving water te...

Page 21: ...erations access the Settings menu set the DHCP option to Off modify the IP Mask Gateway PrimDNS and ScndDNS addresses if needed taking care of the current network settings set Apply changes parameter...

Page 22: ...that we want to control In each system we can have only one master and a maximum of three slaves and it s necessary to indicate the correct number of slaves SCM Address and SCM Number of Units can be...

Page 23: ...on why the automatic mode of fan boost option is available only in chiller mode Fan boost mode can be selected through the parameter 15 01 Page Parameter Range Description R W Psw 15 Customer Configur...

Page 24: ...rt Db 0 10 C W 1 19 02 Delay 0 600min W 1 19 03 Temperature C R 1 19 04 3WV State R 1 19 05 DHW Alarm Code 0 3 R 1 19 06 3WV Type 0 1 W 1 19 07 3WV Switch Time 0 900sec W 1 The path in the Web HMI int...

Page 25: ...BAUD 0 1000 Defines Modbus communication rate in Bps 100 and must be identical for all nodes of the bus W 1 02 Mb Parity 0 Even 1 Odd 2 None Defines the parity used in Modbus communication and must be...

Page 26: ...is Main Menu View Set Unit Protocols 3 24 About Chiller The application version and the BSP version represent the core of software installed on the controller The 22 is only read page contains these i...

Page 27: ...018 accordingly the unit falls within the definition of Low Temperature Heat Pump Please refer to the dedicated Envelope 3 28 HMI Parameters Navigation Table In this table is reported the whole interf...

Page 28: ...1 9 02 Stage up N A W 1 9 03 Stage down N A W 1 9 04 Stage up delay N A W 1 9 05 Stage dn delay N A W 1 9 06 Evap Freeze N A W 2 9 07 Low Press Unld N A W 2 10 Date 10 00 Day N A W 0 10 01 Month N A...

Page 29: ...me N A W 1 16 16 M S Alarm Code N A R 1 17 Scheduler 17 00 Monday W 1 17 0 0 Time 1 W 1 17 0 1 Value 1 W 1 17 0 2 Time 2 W 1 17 0 3 Value 2 W 1 17 0 4 Time 3 W 1 17 0 5 Value 3 W 1 17 0 6 Time 4 W 1 1...

Page 30: ...b Parity N A W 1 22 03 Mb 2StopBit N A W 1 22 04 Mb Timeout N A W 1 22 05 BN Address N A W 1 22 06 BN BAUD N A W 1 22 07 BN Device ID X XXX N A W 1 22 08 BN Device ID XXX N A W 1 22 9 BN Port X N A W...

Page 31: ...eter 7 00 is Alarm Type HMI Code Mapping Alarm Cause Solution Unit U001 UnitExternalEvent External signal mapped as Event detected by UC Check customer external signal source U002 UnitOff TimeNotValid...

Page 32: ...C1Cmp1 OffDischTmpSen Temperature sensor not detected Check sensor wiring connection Contact your local dealer C115 C1 Failed Pumpdown Pumpdown procedure exedes maximum time Contact your local dealer...

Page 33: ...may cause breakage electric shock or fire Contact your dealer The system must be repaired by a qualified service person Malfunction Measure If a safety device such as a fuse a breaker or an earth lea...

Page 34: ...D EOMHP01405 21_02EN 34 35 Notes...

Page 35: ...on to the best of its knowledge No express or implied warranty is given for the completeness accuracy reliability or fitness for particular purpose of its content and the products and services present...

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