Daikin EWAQ-G Operation Manual Download Page 59 | Manualshive

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Daikin EWAQ-G Operation Manual Download Page 59

EWWQ090G ÷  EWWQ720L - R410A - Water-cooled scroll chillers
EWLQ090G   ÷ EWLQ720L   - R410A - Condenser less
EWHQ100G  ÷ EWHQ400G  - R410A - Heat pump scroll chillers
EWAQ-

- R410A - Air-cooled scroll chillers

EWAQ-

- R410A - Air-cooled scroll chillers

EWYQ-

- R410A - Air-cooled scroll heat pumps

Air and Water cooled scroll chillers & heat pump

Operation

Manual

EWWQ - EWLQ - EWHQ
EWAQ - EWYQ

Air or Water cooled scroll chiller &
heat pump
D-EOMHW00107-15EN

Operation Manual

59

5.10.2 Electrical Connection

In the following section are reported all electrical connections necessary for the correct operation of
the Master Slave function.

All schemes present in this section provide only a principle diagram of the electrical

connection

5.10.2.1 Process Bus

The following diagram shows how have to be connected the chillers between them to establish the
Master Slave Network. Starting from first chiller connect in parallel all terminals PB [CE+ / CE-] of

MASTER

SLAVE 1

SLAVE 2

SLAVE 3

BUILDING

MASTER

SLAVE 1

SLAVE 2

SLAVE 3

BUILDING

BUILDING

MASTER

SLAVE 1

SLAVE 2

SLAVE 3

SLAVE 1

BUILDING

MASTER

SLAVE 2

SLAVE 3

Single Common Pump

Single Chiller Pump

Double Chiller Pump

Chiller with sectioned evaporator

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Summary of Contents for EWAQ-G

Page 1: ...cooled scroll chillers EWLQ G Condenser less EWHQ G Heat pump Air cooled ranges EWAQ G EWAQ G EWYQ G heat pump Refrigerant R410A D EOMHW00107 15EN Operation manual Rev 00 Date Supersedes Air and water...

Page 2: ...safety devices 7 1 3 2 Circuit safety devices 7 1 3 3 Component safety devices 7 1 4 Available sensors 9 1 4 1 Pressure transducers 9 1 4 2 Temperature sensors 9 1 4 3 Thermistors 9 1 5 Available Cont...

Page 3: ...pdate procedure 22 3 8 Optional Remote User Interface 24 3 9 Embedded Web Interface 26 4 Menu Structure 28 4 1 Main Menu 28 4 2 View Set Unit 29 4 2 1 Thermostat Ctrl 29 4 2 2 Network Ctrl 29 4 2 3 Un...

Page 4: ...rol Settings 43 5 1 5 Alarm Settings 45 5 1 6 Pumps 46 5 1 7 Power Conservation 46 5 2 Unit Circuit Start up 49 5 2 1 Prepare the unit to start 49 5 2 2 Preparing circuits to start 51 5 3 Circuit Capa...

Page 5: ...oled scroll heat pumps Air and Water cooled scroll chillers heat pump Operation Manual EWWQ EWLQ EWHQ EWAQ EWYQ Air or Water cooled scroll chiller heat pump D EOMHW00107 15EN Operation Manual 5 6 Alar...

Page 6: ...components and accompanying parts supplied separately must be read understood and followed Apply all standard safety codes and practices Wear safety glasses and gloves Use the proper tools to move hea...

Page 7: ...motors to stop but does not switch off power to the unit Do not service or operate on the unit without having switched off the main switch 1 3 2 Circuit safety devices Safety of this level of severity...

Page 8: ...tically activated when the water temperature entering or leaving at the evaporator drops below the antifreeze limit In freeze condition if the unit is in standby the evaporator pump will be activated...

Page 9: ...control the superheated refrigerant temperatures 1 4 3 Thermistors Each compressor is equipped with PTC thermistors which are immersed into motor windings for motor protection Thermistors trip to a h...

Page 10: ...ater Temperature CEWT Condenser Entering Water Temperature 1 7 Customer Terminal Block Connections 1 7 1 Connections description and purpouse The contacts below are available at the user s terminal bl...

Page 11: ...r to start up the unit 1 7 1 2 Double setpoint This contact can be used to switch between two different LWT setpoints and depending on the application between different modes of operation Ice operatio...

Page 12: ...at pump scroll chillers EWAQ G 075 R410A Air cooled scroll chillers EWAQ R410A Air cooled scroll chillers EWYQ R410A Air cooled scroll heat pumps Air and Water cooled scroll chillers heat pump Operati...

Page 13: ...UC to ensure their safe operation UC also gives access to a Test routine covering all inputs and outputs The controller can work in accordance with three independent modes Local mode the machine is c...

Page 14: ...configured for 2 circuits Option Module POL965 00 MCQ 18 Used when options required All boards are supplied from a common 24 Vac sourced directly from the unit Extension boards can be directly powered...

Page 15: ...MCQ Optional Modbus POL902 00 MCQ Optional BACnet MSTP POL904 00 MCQ Optional Separate documents contains all the information about the different protocols supported and how to setup a proper communi...

Page 16: ...ith a set of extension modules that implement additional features All boards communicate via an internal peripheral bus with the UC The UC continuously manages the information received from the variou...

Page 17: ...the unit read the following recommendations When all the operations and all the settings have been carried out close all the switchbox panels The switchbox panels can only be opened by trained person...

Page 18: ...mp to a different page In this case the HMI will jump to the Enter Password page E n t e r P a s s w o r d 2 2 E n t e r P W 3 3 Passwords The HMI structure is based on access levels that means that e...

Page 19: ...n the new page rotate the wheel or use button 4 5 to highlight the Network Ctrl and press the wheel or the button 6 again to jump to the next menu where it is possible read the actual Control Source E...

Page 20: ...en Application BSP update or inizialization Contact Service Extension modules BSP LED BSP LED Mode Solid Green BSP running Solid Red Hardware Error Flashing Red BSP Error Flashing Red Green BSP upgrad...

Page 21: ...ng Solid Yellow Startup or one configured channel not communicating to the Master Solid Red All configured Communications down Means no communication to the Master The timeout can be configured In cas...

Page 22: ...any update process can be started Supported SD types are SD standard High speed SD SDHC The following SD cards have also been tested and found operational 1 GByte SD V1 0 Inmac 2 GByte SD V2 0 SpeedCl...

Page 23: ...estore menu for details Remove power to the controller using the Q12 switch and insert the SD card in its slot as shown in the picture with the contact strips looking toward you Once this is done inse...

Page 24: ...blink green during the boot up and then it will remain solid green to indicate normal operations It s now possible to restore the previous settings if available and restart the unit 3 8 Optional Remo...

Page 25: ...ss the wheel to access it The remote will automatically show the units attached to it no initial entry is required Long press of the ESC button will show the list of the connected controllers Use the...

Page 26: ...terface The unit controller an embedded web interface that can be used to monitor the unit when connected to a local network It is possible to configure the IP addressing of the controller as a fixed...

Page 27: ...follows the same rules in terms of access levels and structure In addition it allows to trend log a maximum of 5 different quantities It s required to click on the value of the quantity to monitor an...

Page 28: ...ll Cir Disabled Off Unit Alarm Off Keypad Disable Off BAS Disable Off Unit Loc Rem Sw Off Test Mode Auto Wait For Load Auto Evap Recirc A C only Auto Water Recirc W C only Auto Wait For Flow Auto Pump...

Page 29: ...ct the active setpoint for unit stage up and down Max Pulldn 1 7 C min 0 1 2 7 C min Max pull down rate of controlled water temperature Max PullUp 1 7 C min 0 1 2 7 C min Max pull up rate of controlle...

Page 30: ...For more details refer to section 5 10 Setpoint Sub Menu Default Range Description Standby Chiller Submenu Standby Chiller Options Submenu Options Thermostat Ctrl Submenu Thermostat Ctrl Data Submenu...

Page 31: ...stem Setpoint Sub Menu Default Range Description Start Up DT 2 7 C 0 0 5 0 C Offset respect the active setpoint for the unit startup Start Up DT 1 5 C 0 0 5 0 C Offset respect the active setpoint for...

Page 32: ...ck settings are maintained thanks to a battery mounted on the controller Make sure that the battery is replaced regularly each 2 years see section 3 6 4 2 7 Power Conservation This page resumes all th...

Page 33: ...ion Circuit 1 Menu for Circuit 1 Circuit 2 Menu for Circuit 2 if present The submenus accessed for each circuit are identical but the content of each of them reflects the status of the corresponding c...

Page 34: ...t stop Run Hours 0h Running hours of compressor No Of Starts 0 Number of compressor starts The compressors enable page allows to enable or disable each compressor of the unit Setpoint Sub Menu Default...

Page 35: ...the defrost procedure refer to section 5 8 Setpoint Sub Menu Default Range Description Man Defrost Off Off On Closed Pressure Superheat Defrost Cnt 0 Counter of defrost cycles Defrost State W W Pr1 4W...

Page 36: ...s for each compressor When the cycle timers are active any new start of a compressor is inhibited Setpoint Sub Menu Default Range Description Comp 1 0s Comp 2 0s Comp 3 0s Comp 4 0s Clear Cycle Tmrs O...

Page 37: ...ngs to Master Slave network M S Nom Of Unit 2 2 3 4 Indicate the number of chiller belonging to Master Slave network This parameter have to be set only in the chiller Master in all Slave units it can...

Page 38: ...e Description Evap LWT 7 0 C Evaporator LWT current reading includes the offset Evp LWT Offset 0 0 C 5 0 5 0 C Evaporator LWT calibration Evap EWT 12 0 C Evaporator EWT current reading includes the of...

Page 39: ...Evaporator Pump 2 relay Cnd Pmp1 Outpt Off Off On Status of the Condenser Pump 1 relay Cnd Pmp2 Outpt Off Off On Status of the Condenser Pump 2 relay Evap EWT Res 0Ohm 340 300kOhm Resistance of the Ev...

Page 40: ...l unit settings This feature can be useful when a software upgrade is needed or to keep a copy of the actual settings for future usages like a controller replacement In case of backup part of the sett...

Page 41: ...Default Range Description Model Code name G O This field could contain the unit order number OVyy zzzzz Unit S N Unit serial number Enter Data This field should contain the unit serial number CH yyLxx...

Page 42: ...ioning which is activated through the Cool Heat switch on the electric box Switch COOL The chiller will work in cooling mode with the Cool LWT 1 as the Active Setpoint Switch HEAT The chiller will wor...

Page 43: ...Thermostat Control Settings Thermostat control settings allow to set up the response to temperature variations and the precision of the thermostat control Default settings are valid for most applicat...

Page 44: ...r can start only if since its previous stop the Stop to Start Delay has expired The unit capacity remains constant if the controlled temperature is within the interval Setpoint Stage Up DT Setpoint St...

Page 45: ...e of the unit It is generally recommended to set to a value whose saturated temperature is 8 to 10 C below the minimum active setpoint This will allow a safe operation and a proper control of compress...

Page 46: ...Enabled and there are compressors available to run The pumps connected to the source water circuit water circuit connected with the cooling tower water well etc are started only when at least one of...

Page 47: ...it Displays active demand limit 5 1 7 2 LWT Reset The LWT Reset function applies a variable offset to the base temperature setpoint selected through the interface from the menu Temperature Setpoints 4...

Page 48: ...If the unit works in heat pump mode with water inversion the correction depends on the condenser entering return water temperature W C only When the evaporator condenser T becomes lower than the SR T...

Page 49: ...5 2 Unit Circuit Start up In this section starting and stopping sequence of the unit will be described All HMI status will be briefly described to allow a better understanding of what is going on int...

Page 50: ...ed by keypad or can be all in alarms Check the individual circuit status for further details Unit Alarm A unit alarm is active Check the alarm list to see what is the active alarm inhibiting the unit...

Page 51: ...status of the circuit is indicated in the View Set Circuit Circuit x The possible status will be described in the following table Overall Status Status Description Off Ready Circuit is off waiting fo...

Page 52: ...with the following flowchart 5 3 Circuit Capacity Control Once a Circuit is started capacity will be adjusted according to thermostat control requirements However there are some limitations which over...

Page 53: ...shut down in order to recover the normal operating conditions This condition is indicated on the controller display in the circuit status as Run Cond Press High The status is automatically cleared whe...

Page 54: ...ion must be active The Backup Heater is then deactivated if any of the following is TRUE the Leaving Water Temperature rises above the Heat Setpoint the Unit Mode is different from Heat A Capacity Lim...

Page 55: ...arantee the best operation at any ambient condition both in cool and heat mode In cooling mode the fan speed is controlled with a PID regulator in order to maintain the condenser pressure at a stable...

Page 56: ...e The transition from Superheat Control to Pressure Control may happen only if the evaporating pressure increases above the Maximum Operating Pressure MOP limit Evap Press Max Op Press Whenever the ci...

Page 57: ...ost will be performed in a sequence of 7 steps Nr Phase Description 1 W Wait for the defrost interstage timer to expire 2 Pr1 Preparation to 4 Way Valve change over to Cool Mode 3 4W1 4 Way Valve chan...

Page 58: ...ery chiller of the Master Slave network is equipped with a pump The pump can be installed directly on the unit or in the pipe of the single chiller and it avoids the water flow in the evaporator if th...

Page 59: ...section are reported all electrical connections necessary for the correct operation of the Master Slave function All schemes present in this section provide only a principle diagram of the electrical...

Page 60: ...e plant type where the Master Slave function is used 1 Single Common Pump In the plant type Single Common Pump where a unique pump provides all water flow all enable pump contacts of each chiller have...

Page 61: ...7 for the enumeration of the terminals 5 10 3 Master Slave Operation 5 10 3 1 Master Slave configuration The basic configuration of the Master Slave function requires the set of three parameters avai...

Page 62: ...that allows to disable the Master Disable the Master unit means that it will not use for the thermoregulation but it will continue to acquire the common leaving water temperature and it will continue...

Page 63: ...ority 2nd Lowest number of starts Lowest load 3rd Lowest running hours Highest running hours 4th Lowest address Highest number of starts 5th Lowest address First condition is related to the priority d...

Page 64: ...according to the following sequences network with one slave Master Slave 1 Master network with tow slaves Master Slave 1 Slave 2 Master network with three slaves Master Slave 1 Slave 2 Slave 3 Master...

Page 65: ...arms are activated when the system or sub system can perform a normal shutdown in spite of the abnormal running conditions Rapid stop alarms are activated when the abnormal running conditions require...

Page 66: ...oving on controller s display Led on the button 2 of External HMI is blinking String in the alarm list DemandLimitAlm String in the alarm log DemandLimitAlm String in the alarm snapshot DemandLimit Al...

Page 67: ...ptom Cause Solution Unit status is Off All circuits are stopped with a normal shutdown procedure Bell icon is moving on controller s display Led on the button 2 of External HMI is blinking String in t...

Page 68: ...an acceptable range Symptom Cause Solution Unit status is Off All circuits are stopped with a normal shutdown procedure Bell icon is moving on controller s display Led on the button 2 of External HMI...

Page 69: ...place the module Check if power supply is ok but LEDs are both off In this case replace the module refers to either driver 1 or driver 2 6 1 3 2 Options controller communication fail alarm This alarm...

Page 70: ...or because of certain working condition i e high values of OAT In these cases the issue can be related with the sizing of power cables There is a short circuit on the unit Check for correct electrical...

Page 71: ...ng in the alarm snapshot UnitOff EvpFreeze Alm Water flow too low Increase the water flow Inlet temperature to the evaporator is too low Increase the inlet water temperature Flow switch is not working...

Page 72: ...d to measure the common leaving water temperature is broken or not connected to the chiller defined master Symptom Cause Solution Every unit in the Master Slave Network works in local mode Bell icon i...

Page 73: ...t start Bell icon is moving on Master controller s display Led on the button 2 of the Master External HMI is blinking String in the alarm list Slave X Missing String in the alarm log Slave X Missing S...

Page 74: ...larm is generated to indicate that the circuit hadn t been able to remove all the refrigerant from the evaporator Symptom Cause Solution Circuit status is Off Led on the button 2 of External HMI is bl...

Page 75: ...r on refrigerant circuit pipe Check for absence of water or humidity on sensor electrical contacts Check for correct plug in of the electrical connectors Check for correct sensors wiring also accordin...

Page 76: ...status is Off The compressor does not load anymore or even unload circuit is stopped immediately Bell icon is moving on controller s display Led on the button 2 of External HMI is blinking String in...

Page 77: ...if the value is in line with kg indication on unit label Condensing pressure transducer could not operate properly Check for proper operation of the high pressure sensor Fans do not operate properly A...

Page 78: ...he electronic expansion valve Blocked valve can to impede the correct refrigerant flow Compressor 1 2 Soft Starter Failure Check Alarm code on the Soft Starter and refer to the related documentation t...

Page 79: ...7 8 No Pressure Change At Start alarm This alarm indicates that the compressor is not able to start or it is not able to create a minimum variation of the evaporating or condensing pressures after st...

Page 80: ...transducer is not operating properly Symptom Cause Solution Circuit status is Off The circuit is stopped Bell icon is moving on controller s display Led on the button 2 of External HMI is blinking St...

Page 81: ...llers EWAQ R410A Air cooled scroll chillers EWAQ R410A Air cooled scroll chillers EWYQ R410A Air cooled scroll heat pumps Air and Water cooled scroll chillers heat pump Operation Manual EWWQ EWLQ EWHQ...

Page 82: ...cy reliability or fitness for particular purpose of its content and the products and services presented therein Specifications are subject to change without prior notice Daikin Europe N V explicitly r...

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