Daikin EWWQ-G User manual

Water cooled ranges:
EWWQ-G Water-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 cooled
scroll chillers & heat
pump

EWWQ090G ÷ EWWQ720L - R410A - Water-cooled scroll chillers
EWLQ090G ÷ EWLQ720L - R410A - Condenser less
EWHQ100G ÷ EWHQ400G - R410A - Heat 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
Operation
Manual
Operation Manual
2
EWWQ - EWLQ - EWHQ
EWAQ - EWYQ
Air or Water cooled scroll chiller &
heat pump
D-EOMHW00107-15EN
Table of Contents
1SAFETY CONSIDERATIONS..................................................................................................6
1.1 General.............................................................................................................................6
1.2 Avoid electrocution ...........................................................................................................6
1.3 Safety Devices..................................................................................................................7
1.3.1 General 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 Controls.............................................................................................................9
1.5.1 Evaporator - Condenser pumps.................................................................................9
1.5.2 Compressors.............................................................................................................9
1.5.3 Expansion Valve........................................................................................................9
1.5.4 Four Way Valve.........................................................................................................9
1.6 Abbreviations used.........................................................................................................10
1.7 Customer Terminal Block Connections...........................................................................10
1.7.1 Connections description and purpouse....................................................................10
2GENERAL DESCRIPTION ....................................................................................................13
2.1 Overview.........................................................................................................................13
2.2 Controller Operating Limits .............................................................................................13
2.3 Controller Architecture....................................................................................................13
2.4 Communication Modules ................................................................................................14
2.4.1 Modbus Module installation .....................................................................................15
2.4.2 Bacnet Module installation.......................................................................................15
2.4.3 Lon Module installation............................................................................................16
3Using the Controller...............................................................................................................16
3.1 General Recommendation..............................................................................................17
3.2 Browsing.........................................................................................................................17
3.3 Passwords......................................................................................................................18

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
3
3.4 Editing ............................................................................................................................19
3.5 Basic Control System Diagnostic....................................................................................20
3.6 Controller maintenance...................................................................................................21
3.7 Software Update procedure............................................................................................22
3.8 Optional Remote User Interface......................................................................................24
3.9 Embedded Web Interface ...............................................................................................26
4Menu 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 Unit Cond Ctrl (W/C only) ........................................................................................29
4.2.4 Pumps.....................................................................................................................30
4.2.5 Master/Slave............................................................................................................30
4.2.6 Date/Time................................................................................................................32
4.2.7 Power Conservation ................................................................................................32
4.2.8 Controller IP setup...................................................................................................32
4.3 View/Set Circuit ..............................................................................................................33
4.3.1 Settings ...................................................................................................................33
4.4 Tmp Setpoints.................................................................................................................35
4.5 Temperatures.................................................................................................................35
4.6 Available Modes .............................................................................................................36
4.7 Timers ............................................................................................................................36
4.8 Alarms............................................................................................................................36
4.9 Commission Unit.............................................................................................................36
4.9.1 Configure Unit..........................................................................................................37
4.9.2 Alarm Limits.............................................................................................................37
4.9.3 Calibrate Unit Sensors.............................................................................................38
4.9.4 Calibrate Circuit Sensors.........................................................................................38
4.9.5 Unit Manual Control.................................................................................................39
4.9.6 Circuit 1 Manual Control ..........................................................................................39
4.9.7 Scheduled Maintenance ..........................................................................................40
4.10 Save and Restore...........................................................................................................40

EWWQ090G ÷ EWWQ720L - R410A - Water-cooled scroll chillers
EWLQ090G ÷ EWLQ720L - R410A - Condenser less
EWHQ100G ÷ EWHQ400G - R410A - Heat 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
Operation
Manual
Operation Manual
4
EWWQ - EWLQ - EWHQ
EWAQ - EWYQ
Air or Water cooled scroll chiller &
heat pump
D-EOMHW00107-15EN
4.11 About this Chiller.............................................................................................................41
5Working with this unit.............................................................................................................41
5.1 Unit Setup.......................................................................................................................41
5.1.1 Control Source.........................................................................................................41
5.1.2 Available Mode Setting............................................................................................42
5.1.3 Temperature Setpoint Settings ................................................................................42
5.1.4 Thermostat Control 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 Capacity Control..................................................................................................52
5.3.1 Low Evaporating Pressure.......................................................................................52
5.3.2 High Condensing Pressure......................................................................................53
5.4 Mode Change-Over (H/P only)........................................................................................53
5.5 Backup Heaters (A/C only)..............................................................................................53
5.6 Condensation Control (W/C only)....................................................................................54
5.6.1 Pressure (W/C only) ................................................................................................54
5.6.2 Cond In / Cond Out (W/C only)................................................................................55
5.6.3 Fan Control (A/C only).............................................................................................55
5.7 EXV Control....................................................................................................................55
5.8 Defrost (A/C only)...........................................................................................................56
5.9 Four Way Valve (H/P gas side reversal only)..................................................................57
5.10 Master/Slave...................................................................................................................57
5.10.1 Master Slave Overview............................................................................................57
-Plant 1 : Single Common Pump......................................................................................58
-Plant 2 : Single Chiller Pump ..........................................................................................58
-Plant 4. Chiller with sectioned evaporator.......................................................................58
5.10.2 Electrical Connection...............................................................................................59
5.10.3 Master Slave Operation...........................................................................................61
5.10.4 Master Slave Options...............................................................................................63

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
5
6Alarms ...................................................................................................................................65
6.1.1 Unit Warning Alarms................................................................................................65
6.1.2 Unit Pumpdown Stop Alarms...................................................................................67
6.1.3 Unit Rapid Stop Alarms............................................................................................69
6.1.4 Master Slave Alarm .................................................................................................72
6.1.5 Circuit Warning Alarms............................................................................................74
6.1.6 Circuit Pumpdown Stop Alarms ...............................................................................75
6.1.7 Circuit Rapid Stop Alarms........................................................................................75

EWWQ090G ÷ EWWQ720L - R410A - Water-cooled scroll chillers
EWLQ090G ÷ EWLQ720L - R410A - Condenser less
EWHQ100G ÷ EWHQ400G - R410A - Heat 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
Operation
Manual
Operation Manual
6
EWWQ - EWLQ - EWHQ
EWAQ - EWYQ
Air or Water cooled scroll chiller &
heat pump
D-EOMHW00107-15EN
1 SAFETY CONSIDERATIONS
1.1 General
Installation, start-up and servicing of equipment can be hazardous if certain factors particular to the
installation are not considered: operating pressures, presence of electrical components and
voltages and the installation site (elevated plinths and built-up up structures). Only properly
qualified installation engineers and highly qualified installers and technicians, fully trained for the
product, are authorised to install and start-up the equipment safely.
During all servicing operations, all instructions and recommendations, which appear in the
installation and service instructions for the product, as well as on tags and labels fixed to the
equipment and 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 heavy objects. Move units carefully and set them down gently.
1.2 Avoid electrocution
Only personnel qualified in accordance with IEC (International Electrotechnical Commission)
recommendations may be permitted access to electrical components. It is particularly
recommended that all sources of electricity to the unit be shut off before any work is begun. Shut
off main power supply at the main circuit breaker or isolator.
IMPORTANT: This equipment uses and emits electromagnetic signals. Tests have shown
that the equipment conforms to all applicable codes with respect to electromagnetic
compatibility.
RISK OF ELECTROCUTION: Even when the main circuit breaker or isolator is switched
off, certain circuits may still be energized, since they may be connected to a separate
power source.
RISK OF BURNS: Electrical currents cause components to get hot either temporarily or
permanently. Handle power cable, electrical cables and conduits, terminal box covers
and motor frames with great care.
ATTENTION: In accordance with the operating conditions the fans can be cleaned
periodically. A fan can start at any time, even if the unit has been shut down.

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
7
1.3 Safety Devices
Each unit is equipped with safety devices of three different kinds:
1.3.1 General safety devices
Safeties of this level of severity will shut down all the circuits and stop the entire unit. When a
general safety device will occur a manual intervention on the unit will be required in order to re-
establish the normal operability of the machine. There are exceptions to this general rule in case of
alarms linked to temporary abnormal conditions.
Emergency Stop
A push button is placed on a door of the unit electrical panel. The button is highlighted by a red
color in yellow background. A manual pressure of the emergency stop button stops all loads from
rotating, thus preventing any accident which may occur. An alarm is also generated by the Unit
Controller. Releasing the emergency stop button enables the unit, which may be restarted only
after the alarm has been cleared on the controller.
The emergency stop causes all 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 will shut down the circuit they protect. The remaining circuits will
keep running.
1.3.3 Component safety devices
Safety of this level of severity will shut down a component against abnormal running condition that
could create permanent damages to it. An overview of the protecting devices is listed below:
Overcurrent/Overload Protections
Overcurrent/overload devices protect electrical motors used on compressors, and pumps in
case of overload or short circuit. In case of inverter-driven motors, overload and overcurrent
protection is integrated in the electronic drives. A further protection from short circuit is
accomplished by fuses or circuit breakers installed upstream each load or group of loads.
Overtemperature Protections
Compressors are also protected from overheating by thermistors immersed into motor windings.
Should the winding temperature exceed a fixed threshold, the thermistors will trip and cause the
motor to stop.
Phase reversal, under/over voltage, ground fault protections
When one of those alarms occurs the unit is immediately stopped or even inhibited to start. The
alarms clear automatically once the problem is fixed. This auto clear logic allows the unit to
automatically recover in case of temporary conditions where the supply voltage reaches the
upper or lower limit set on the protection device. In the other two cases a manual intervention

EWWQ090G ÷ EWWQ720L - R410A - Water-cooled scroll chillers
EWLQ090G ÷ EWLQ720L - R410A - Condenser less
EWHQ100G ÷ EWHQ400G - R410A - Heat 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
Operation
Manual
Operation Manual
8
EWWQ - EWLQ - EWHQ
EWAQ - EWYQ
Air or Water cooled scroll chiller &
heat pump
D-EOMHW00107-15EN
on the unit will be required in order to solve the problem. In case of a phase reversal alarm two
phases requires to be inverted.
In the event of a power supply outage, the unit will restart automatically without the need for an
external command. However, any faults active when the supply is interrupted are saved and
may in certain cases prevent a circuit or unit from restarting.
Direct intervention on the power supply can cause electrocution, burns or even death. This action
must be performed only by trained persons.
Flowswitch
The unit must be protected by a flowswitch. The flowswitch will stop the unit when the water
flow becomes lower than the minimum allowed flow. When the water flow is restored the flow
protection resets automatically. Exception is when the flowswitch opens with at least one
compressor running, in this case the alarm shall be cleared manually.
Freezing protection
Antifreeze protection prevents the water to freeze in the evaporator. It is automatically 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 to prevent
freezing of the evaporator. If the freeze condition will activate when the unit is running all the
unit will shut down in alarm while the pump will keep running. Alarm will automatically clear
when the freeze condition will clear.
Low pressure protection
If the circuit operates with a suction pressure lower than an adjustable limit for a certain time the
circuit safety logic will shut down the circuit and generate an alarm. The alarm requires a
manual action on the Unit Controller to be reset. Reset will take effect only if the suction
pressure is no longer lower that the safety limit.
High Pressure Protection
If the discharge pressure becomes too high and exceeds a limit which is linked with the
operational envelop of the compressor the circuit safety logic will try to prevent the alarm or, if
the corrective actions have no effect, it will shut down the circuit before the Mechanical High
Pressure switch will open. This alarm required a manual action on the Unit Controller to be
reset.
Mechanical High Pressure Switch
Each circuit is equipped with at least one high pressure switch which tries to prevent the relief
safety valve to open. When the discharge pressure becomes too high the Mechanical High
Pressure switch will open and immediately stop the compressor cutting the power supply to the
auxiliary relay. The alarm can be cleared as soon as the discharge pressure becomes normal

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
9
again. The alarm must be reset on the switch itself and on the Unit Controller. The triggering
pressure value cannot be changed.
Relief Safety Valve
If the pressure becomes too high in the refrigerant circuit, the relief valve will open to limit the
maximum pressure. If this happens switch off immediately the machine and contact your local
service organization.
1.4 Available sensors
1.4.1 Pressure transducers
Two electronic sensors are used to measure the evaporating and condensing pressure of each
circuit. The range of each sensor is clearly indicated on the sensor casing.
1.4.2 Temperature sensors
The evaporator and condenser water sensors are installed in the entering and leaving side.
Additionally each circuit installs a suction temperature sensor to monitor and 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 high value in case the motor temperature reaches a
hazardous temperature.
1.5 Available Controls
In the following the different functions will be distinguished between Water Cooled (W/C) and Air
Cooled (A/C) units and Cooling Only (C/O) and Heat Pumps (H/P). If not specified one specific
function can apply to any W/C unit independently from being a C/O or H/P unit.
1.5.1 Evaporator - Condenser pumps
The controller can regulate one or two evaporator pumps and takes care of automatic change-over
between pumps. It’s also possible to prioritize the pumps and temporarily disable one of the twos.
The controller can also regulate an unique condenser water pump (W/C units only).
1.5.2 Compressors
The controller can regulate two or four compressors installed on one or two independent refrigerant
circuit. All the safeties of each compressor will be managed by the controller.
1.5.3 Expansion Valve
The controller can regulate an electronic expansion valve per each refrigerant circuit to guarantee
the best operation for the refrigerant circuit.
1.5.4 Four Way Valve
The controller can command a four way valve per each refrigerant circuit where required. The
valve is used to reverse the unit mode from Cool to Heat.

EWWQ090G ÷ EWWQ720L - R410A - Water-cooled scroll chillers
EWLQ090G ÷ EWLQ720L - R410A - Condenser less
EWHQ100G ÷ EWHQ400G - R410A - Heat 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
Operation
Manual
Operation Manual
10
EWWQ - EWLQ - EWHQ
EWAQ - EWYQ
Air or Water cooled scroll chiller &
heat pump
D-EOMHW00107-15EN
1.6 Abbreviations used
In this manual, the refrigeration circuits are called circuit #1 and circuit #2.
The following abbreviations are used frequently:
UC
Unit controller
HMI
Human Machine Interface
A/C
Air Cooled
W/C
Water Cooled
C/O
Cooling Only
H/P
Heat Pump
CL
Condenser Less
CP
Condensing Pressure
EP
Evaporating Pressure
CSRT
Condensing Saturated Refrigerant Temperature
ESRT
Evaporating Saturated Refrigerant Temperature
ST
Suction Temperature
SSH
Suction SuperHeat
EXV
Electronic Expansion Valve
ELWT
Evaporator Leaving Water Temperature
EEWT
Evaporator Entering Water Temperature
CLWT
Condenser Leaving Water 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 block referred as MC24 or MC230 in the
wiring diagram. The following table summarizes the connections at the user’s terminal block.
Description
Terminals
Notes
Evaporator Flow Switch (mandatory)
724, 708
For potential-free contacts
Sampling voltage / current DC 24 V / 8 mA
Condenser Flow Switch (W/C
mandatory)
794, 793
For potential-free contacts
Sampling voltage / current DC 24 V / 8 mA
Cooling/Heating Remote switch (H/P
units only)
743,744
For potential-free contacts
Sampling voltage / current DC 24 V / 8 mA
Double setpoint
713,709
For potential-free contacts
Sampling voltage / current DC 24 V / 8 mA
External Fault
884, 885
For potential-free contacts
Sampling voltage / current DC 24 V / 8 mA
On-Off Remote
741, 742
For potential-free contacts
Sampling voltage / current DC 24 V / 8 mA
General Alarm
525, 526
NO digital output (24…230 Vac ext supply)
Evaporator Pump #1 start
527,528
NO digital output (24…230 Vac ext supply)
Evaporator Pump #2 start (A/C only)
530, 531
NO digital output (24…230 Vac ext supply)
Evaporator Pump #2 start (W/C only)
893,894
NO digital output (24 Vdc - 25mA )

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
11
Condenser Pump #1 start (W/C only)
520,521
NO digital output (24…230 Vac ext supply)
Condenser Pump #2 start (W/C only)
540,541
NO digital output (24…230 Vac ext supply)
Demand Limit
888, 889
4-20 mA analog input
Setpoint Override
886, 887
4-20 mA analog input
Condenser three way valve (W/C only)
772, 773
0-10V analog output
Condenser tower fan speed (W/C only)
772, 774
0-10V analog output
Master/Slave Water Temperature
890, 896
NTC10K / PT1000 temperature sensor
Master/Slave Bus Connection
900, 901
Serial communication
1.7.1.1 Flow Switch
Although the flow switch is offered as an optional, it is mandatory to install one and connect it to
the digital input terminals in order to enable chiller operation only when a minimum flow is sensed.
Operating the unit by-passing the flow switch input or without an appropriate flow switch may
damage the water heat exchanger due to freezing. Operation of the flow switch must be checked
prior 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 operation must be selected in case of ice storage application. In this case the UC will run the
chiller in on/off mode switching all the chiller off as soon as the setpoint is reached. In this case the
unit will run to full capacity and then will switch off applying an ice delay different chiller starts.
1.7.1.3 External Fault (optional)
This contact is available to report to the UC a fault or a warning from an external device. It could be
an alarm coming from an external pump to inform the UC of the fault. This input can be configured
as a fault (unit stop) or a warning (displayed on the HMI without any action on the chiller).
1.7.1.4 Remote On-Off
This unit can be started through a remote enable contact. The Q0 switch must be selected to
“Remote”.
1.7.1.5 General Alarm
In case of a unit alarm, this output is closed thus indicating a fault condition to an externally
connected BMS.
1.7.1.6 Evaporator Pump Start
Two digital outputs are enabled when the pumps (#1 or #2) are required to start. The output for the
pump #2 requires a relay with less than 20 mA excitation current.
1.7.1.7 Setpoint override (optional)
This input allows to apply an offset on the Active Setpoint to adjust the operating point of the
ELWT. This input can be used to maximize the comfort.
1.7.1.8 Demand Limit (optional)
This input allows to limit the maximum number of compressor in run state.

EWWQ090G ÷ EWWQ720L - R410A - Water-cooled scroll chillers
EWLQ090G ÷ EWLQ720L - R410A - Condenser less
EWHQ100G ÷ EWHQ400G - R410A - Heat 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
Operation
Manual
Operation Manual
12
EWWQ - EWLQ - EWHQ
EWAQ - EWYQ
Air or Water cooled scroll chiller &
heat pump
D-EOMHW00107-15EN

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
13
2 GENERAL DESCRIPTION
2.1 Overview
The UC is a system for controlling single or dual-circuit W/C and A/C liquid chillers / heat-pump.
The UC controls compressor start-up necessary to maintain the desired heat exchanger leaving
water temperature.
On W/C units the UC can optionally controls a three way valve or a cooling tower to perform a
condensing control. One of the following three variables can be selected as condensing target:
- Condenser leaving water temperature (W/C only)
- Condenser entering water temperature (W/C only)
- Condensing saturated refrigerant temperature
Safety devices are constantly monitored by the 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 controlled by commands from the user interface.
Remote mode: the machine is controlled by remote contacts (volt-free contacts).
Network mode: the machine is controlled by commands from a BAS system. In this case, a
data communication cable is used to connect the unit to the BAS.
When the UC operates autonomously (Local or Remote mode) it retains all of its own control
capabilities but does not offer any of the command features of the Network mode (monitoring only).
2.2 Controller Operating Limits
Operation (IEC 721-3-3):
Temperature -40...+70 °C
Restriction LCD -20… +60 °C
Restriction Process-Bus -25….+70 °C
Humidity < 90 % r.h (no condensation)
Air pressure min. 700 hPa, corresponding to max. 3,000 m above sea level
Transport (IEC 721-3-2):
Temperature -40...+70 °C
Humidity < 95 % r.h (no condensation)
Air pressure min. 260 hPa, corresponding to max. 10,000 m above sea level.
2.3 Controller Architecture
The overall controller architecture is the following:
A unit controller (UC)
I/O extensions as needed depending on the configuration of the unit
Communications interface(s) as selected

EWWQ090G ÷ EWWQ720L - R410A - Water-cooled scroll chillers
EWLQ090G ÷ EWLQ720L - R410A - Condenser less
EWHQ100G ÷ EWHQ400G - R410A - Heat pump scroll chillers
EWAQ-G 075 - R410A - Air-cooled scroll chillers
EWAQ- - R410A - Air-cooled scroll chillers
EWYQ- - R410A - Air-cooled scroll heat pumps
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Peripheral Bus is used to connect I/O extensions to the main controller.
Controller/
Extension Module
Siemens Part Number
Address
Usage
Main Controller
POL638.00/MCQ
n/a
Used on all configurations
EEXV Module 1
POL94E.00/MCQ
3
Used on all configurations
EEXV Module 2
POL94E.00/MCQ
5
Used when 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 by the Unit Controller. All boards can be also supplied by a 24Vdc source.
These are the limits for the two different power supplies available:
AC: 24V 20% (frequency 45 65Hz)
DC: 24V 10%
Maintain the correct G-G0 polarity when connecting the power supply directly to the extension
boards. The peripheral bus communication will not operate and the boards may be damaged.
2.4 Communication Modules
Any of the following modules can be connected directly to the left side of the main controller to
allow a BAS or other remote interface to function. Up to three can be connected to the controller at
a time. To make the connection is required to remove the knockout covers on both UC and
communication module as shown in the following pictures.

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
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Operation
Manual
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Operation Manual
15
The controller should automatically detect and configure itself for new modules after booting up.
Removing modules from the unit will require manually changing of the configuration.
Module
Siemens Part Number
Usage
BacNet/IP
POL908.00/MCQ
Optional
Lon
POL906.00/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 communication with a BMS.
2.4.1 Modbus Module installation
In case of Modbus connection with a BMS the corresponding module has to be installed on the
unit. It has to be connected to the Unit Controller as indicated in the previous section.
The module has two different ports available but only the top port is programmed and operational.
A dedicated menu allows to properly setup the communication parameters.
2.4.2 Bacnet Module installation
In case of Bacnet connection with a BMS, there are two different modules available depending on
the physical connection to the customer network. The two possible connections are IP or MSTP.
A dedicated menu allows to properly setup the communication parameters.

EWWQ090G ÷ EWWQ720L - R410A - Water-cooled scroll chillers
EWLQ090G ÷ EWLQ720L - R410A - Condenser less
EWHQ100G ÷ EWHQ400G - R410A - Heat 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
Operation
Manual
Operation Manual
16
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EWAQ - EWYQ
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heat pump
D-EOMHW00107-15EN
2.4.3 Lon Module installation
In case of Lon connection with a BMS, there are two different modules available depending on the
physical connection to the customer network. The type of connection is FTT10.
A dedicated menu allows to properly setup the communication parameters.
3 Using the Controller
The control system consists of a unit controller (UC) equipped with 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 various pressure and
temperature probes installed on the unit. The UC incorporates a program that controls the unit.
Two different types of UC HMI are available as standard HMI:
1. Inbuilt HMI (A/C units)
This HMI is provided of three buttons and one wheel button.
Alarm status (from any page it links with the page with alarm list, alarm log and alarm
snapshot if available)
INFO
Back to Main Page
ESC
Back to the previous level (it can be the Main Page)
Wheel
Button
Used to scroll between the different menu pages, settings and data available on the HMI
for the active password level. Rotating the wheel allows to navigate between lines on a
screen (page) and to increase and decrease changeable values when editing. Pushing
the wheel acts as an Enter Button and will jump from a link to the next set of parameters.

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
17
2. External HMI (POL871.72) (W/C units)
This External HMI is provided of six buttons.
1
i
Back to Main Page
2

Alarm status (from any page it links with the page with alarm list, alarm log and
alarm snapshot if available)
3
Back to the previous level (it can be the Main Page)
4
▲
Go above
5
▼
Go below
6

Confirm
3.1 General Recommendation
Before switching on 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 personnel
When the UC requires to be accessed frequently the installation of a remote interface is
strongly recommended
Compressor are protected from freezing by electrical heaters. These heaters are supplied
through unit main supply and temperature controlled by thermostat.
the LCD display of the unit controller may be damaged by extremely low temperatures. For
this reason, it is strongly recommended to never power off the unit during winter, especially
in cold climates.
3.2 Browsing
When power is applied to the control circuit, the HMI screen will be active and display the Home
screen.
An example of the HMI screens is shown in the following picture.
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=
7
.
0
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1
2
1
3
1
4
5
6

EWWQ090G ÷ EWWQ720L - R410A - Water-cooled scroll chillers
EWLQ090G ÷ EWLQ720L - R410A - Condenser less
EWHQ100G ÷ EWHQ400G - R410A - Heat 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
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Operation Manual
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EWAQ - EWYQ
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In the inbuilt HMI a ringing bell in the top right corner will indicate an active alarm, If the bell
doesn’t move it means that the alarm has been acknowledged but not cleared because the alarm
condition hasn’t been removed.
Same alarm indication is performed by the LED of the button 2 of the external HMI.
M
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The active item is highlighted in contrast, in this example the item highlighted in Main Menu is a
link to another page. By pressing the button 6, the HMI will jump to a different page. In this case
the HMI will jump to the Enter Password page.
E
n
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w
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2
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2
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W
*
*
*
*
3.3 Passwords
The HMI structure is based on access levels that means that each password will disclose all the
settings and parameters allowed to that password level. Basic information about the status
including the active alarm list, active setpoint and controlled water temperature can be accessed
without the need to enter the password.
The UC handles two level of passwords:
USER
5321
MAINTENANCE
2526
The following information will cover all data and settings accessible with the maintenance
password. User password will disclose a subset of the settings explained in chapter 4.
In the Enter Password screen, the line with the password field will be highlighted to indicate that
the field on the right can be changed. This represents a setpoint for the controller. Pressing the
wheel or button 6 the individual field will be highlighted to allow an easy introduction of the numeric
password. By changing all fields, the 4 digits password will be entered and, if correct, the additional
settings available with that password level will be disclosed.
E
n
t
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a
s
s
w
o
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d
2
/
2
E
n
t
e
R
P
W
5
*
*
*

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
19
The password will time out after 10 minutes and is cancelled if a new password is entered or the
control powers down. Entering an invalid password has the same effect as continuing without a
password.
Once a valid password has been entered, the controller allows further changes and access without
requiring the user to enter a password until either the password timer expires or a different
password is entered. The default value for this password timer is 10 minutes.
3.4 Editing
Only line with highlighted value field can be edited, through the right buttons it is possible selected
and modify the value.
A parameter with an “R” is read only; it is giving a value or description of a condition. An “R/W
indicates a read and/or write opportunity; a value can be read or changed (providing the proper
password has been entered).
Example 1: Check Status, for example -is the unit being controlled locally or by an external
network? We are looking for the Unit Control Source since this a unit status parameter, start at
Main Menu and select View/Set Unit and press the wheel or button 6 to jump to the next set of
menus. There will be an arrow at the right side of the box, indicating that a jump to the next level is
required.
In 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.
Example 2: Change a Set point, the chilled water set point for example. This parameter is
designated as Cool LWT Set point 1 and is a unit set parameter. From the Main Menu select Active
Setpt. The arrow indicated that there is a link to a further menu.
Press the wheel or button 6 and jump to the temperature setpoint page. Select Cool LWT 1 and
press the wheel or button 6 to jump to the item change page. Rotate the wheel or use buttons 4 / 5
to adjust the set point to the desired value. When this is done press the wheel or button 6 again to
confirm the new value. With the button ESC or 3 it will be possible to jump back to the main menu
where the new value will be displayed.
Example 3: Clear an Alarm,. The presence of a new alarm is indicated with a Bell ringing on the
top right of the display. If the Bell is frozen one or more alarm had been acknowledged but are still
active. To view the Alarm menu from the Main Menu scroll down to the Alarms line. Note the arrow
indicating this line is a link. Press the button 6 to jump to the next menu Alarms. There are two
lines here; Alarm Active and Alarm Log. Alarms are cleared from the Active Alarm link. Press the
button 6 to jump to the next screen. When the Active Alarm list is entered scroll to the item AlmClr
which is set to off by default. Change this value to on to acknowledge the alarms. If the alarms can
be cleared then the alarm counter will display 0 otherwise it will display the number of alarm still
active. When the alarms are acknowledged the Bell on the top right of the display will stop to ring if
some of the alarms are still active or will disappear if all the alarms are cleared.

EWWQ090G ÷ EWWQ720L - R410A - Water-cooled scroll chillers
EWLQ090G ÷ EWLQ720L - R410A - Condenser less
EWHQ100G ÷ EWHQ400G - R410A - Heat 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
Operation
Manual
Operation Manual
20
EWWQ - EWLQ - EWHQ
EWAQ - EWYQ
Air or Water cooled scroll chiller &
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D-EOMHW00107-15EN
3.5 Basic Control System Diagnostic
Unit controller, extension modules and communication modules are equipped with two status LED
(BSP and BUS) to indicate the operational status of the devices. The BUS LED indicates the status
of the communication with the controller. The meaning of the two status LED is indicated below.
UC BSP LED
BSP LED
Mode
Solid Green
Application running
Solid Yellow
Application loaded but not running (*) or BSP Upgrade mode active
Solid Red
Hardware Error (*)
Flashing Green
BSP startup phase. The controller needs time for starting.
Flashing Yellow
Application not loaded (*)
Flashing Yellow/Red
Fail safe mode (in case that the BSP upgrade was interrupted)
Flashing Red
BSP Error (software error*)
Flashing Red/Green
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 upgrade mode
BUS LED
BUS LED
Mode
Solid Green
Communication running, I/O working
Solid Yellow
Communication running but parameter from the application wrong or missing, or uncorrect factory calibration
Solid Red
Communication down (*)
Communication modules
BSP LED (same for all modules)
BSP LED
Mode
Solid Green
BPS running, communication with controller
Solid Yellow
BSP running, no communication with controller (*)
Solid Red
Hardware Error (*)
Flashing Red
BSP Error (*)
Flashing Red/Green
Application/BSP update
(*) Contact Service.
LON module BUS LED
BUS LED
Mode
Solid Green
Ready for Communication. (All Parameter loaded, Neuron configured). Doesn't indicate a communication
with other devices.
Solid Yellow
Startup
Solid Red
No Communication to Neuron (internal error, could be solved by downloading a new LON application)
Flashing
Yellow
Communication not possible to the Neuron. The Neuron must be configured and set online over the LON
Tool.
Bacnet MSTP BUS LED
BUS LED
Mode
Solid Green
Ready for Communication. The BACnet Server is started. It doesn't indicate a active communication
Solid Yellow
Startup
Solid Red
BACnet Server down. Automatically a restart after 3 seconds are initiated.