Carel 2707945 Ultracella EEV Module WM00ENNI0K User Manual

EVD evolution
electronic expansion valve driver
User manual
NO POWER
& SIGNAL
CABLES
TOGETHER
READ CAREFULLY IN THE TEXT!
ENG
WARNINGS
DISPOSAL
CAREL bases the development of its products on decades of experience
in HVAC, on the continuous investments in technological innovations
to products, procedures and strict quality processes with in-circuit and
functional testing on 100% of its products, and on the most innovative
production technology available on the market. CAREL and its subsidiaries
nonetheless cannot guarantee that all the aspects of the product and the
software included with the product respond to the requirements of the final
application, despite the product being developed according to start-of-theart techniques. The customer (manufacturer, developer or installer of the final
equipment) accepts all liability and risk relating to the configuration of the
product in order to reach the expected results in relation to the specific final
installation and/or equipment. CAREL may, based on specific agreements, acts
as a consultant for the positive commissioning of the final unit/application,
however in no case does it accept liability for the correct operation of the final
equipment/system.
INFORMATION FOR USERS ON THE CORRECT
HANDLING OF WASTE ELECTRICAL AND ELECTRONIC EQUIPMENT (WEEE)
In reference to European Union directive 2002/96/EC issued on 27 January
2003 and the related national legislation, please note that:
1. WEEE cannot be disposed of as municipal waste and such waste must be
collected and disposed of separately;
2. the public or private waste collection systems defined by local legislation must
be used. In addition, the equipment can be returned to the distributor at
the end of its working life when buying new equipment;
3. the equipment may contain hazardous substances: the improper use or
incorrect disposal of such may have negative effects on human health
and on the environment;
4. the symbol (crossed-out wheeled bin) shown on the product or on the
packaging and on the instruction sheet indicates that the equipment has
been introduced onto the market after 13 August 2005 and that it must
be disposed of separately;
5. in the event of illegal disposal of electrical and electronic waste, the penalties
are specified by local waste disposal legislation.
The CAREL product is a state-of-the-art product, whose operation is specified
in the technical documentation supplied with the product or can be
downloaded, even prior to purchase, from the website www.carel.com.
Each CAREL product, in relation to its advanced level of technology, requires
setup/configuration/programming/commissioning to be able to operate in
the best possible way for the specific application. The failure to complete such
operations, which are required/indicated in the user manual, may cause the
final product to malfunction; CAREL accepts no liability in such cases.
Only qualified personnel may install or carry out technical service on the
product.
The customer must only use the product in the manner described in the
documentation relating to the product.
Warranty on the materials: 2 years (from the date of production, excluding
consumables).
Approval: the quality and safety of CAREL INDUSTRIES products are
guaranteed by the ISO 9001 certified design and production system, as well
as by the marks (*).
In addition to observing any further warnings described in this manual, the
following warnings must be heeded for all CAREL products:
• prevent the electronic circuits from getting wet. Rain, humidity and all
types of liquids or condensate contain corrosive minerals that may damage
the electronic circuits. In any case, the product should be used or stored
in environments that comply with the temperature and humidity limits
specified in the manual;
• do not install the device in particularly hot environments. Too high
temperatures may reduce the life of electronic devices, damage them and
deform or melt the plastic parts. In any case, the product should be used
or stored in environments that comply with the temperature and humidity
limits specified in the manual;
• do not attempt to open the device in any way other than described in the
manual;
• do not drop, hit or shake the device, as the internal circuits and mechanisms
may be irreparably damaged;
• do not use corrosive chemicals, solvents or aggressive detergents to clean
the device;
• do not use the product for applications other than those specified in the
technical manual.
All of the above suggestions likewise apply to the controllers, serial boards,
programming keys or any other accessory in the CAREL product portfolio.
CAREL adopts a policy of continual development. Consequently, CAREL
reserves the right to make changes and improvements to any product
described in this document without prior warning.
The technical specifications shown in the manual may be changed without
prior warning.
CAUTION: separate as much as possible the probe and digital input signal
cables from the cables carrying inductive loads and power cables to avoid
possible electromagnetic disturbance.
Never run power cables (including the electrical panel wiring) and signal
cables in the same conduits.
NO POWER
& SIGNAL
CABLES
TOGETHER
The liability of CAREL in relation to its products is specified in the CAREL general
contract conditions, available on the website www.carel.com and/or by
specific agreements with customers; specifically, to the extent where allowed
by applicable legislation, in no case will CAREL, its employees or subsidiaries
be liable for any lost earnings or sales, losses of data and information, costs of
replacement goods or services, damage to things or people, downtime or any
direct, indirect, incidental, actual, punitive, exemplary, special or consequential
damage of any kind whatsoever, whether contractual, extra-contractual or
due to negligence, or any other liabilities deriving from the installation, use or
impossibility to use the product, even if CAREL or its subsidiaries are warned
of the possibility of such damage.
READ CAREFULLY IN THE TEXT!
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Content
1. INTRODUCTION
7
9. ALARMS
1.1 Models .............................................................................................................................7
1.2 Functions and main characteristics..................................................................................7
2. INSTALLATION
9.1
9.2
9.3
9.4
9.5
9.6
9
2.1 DIN rail assembly and dimensions...................................................................................9
2.2 Description of the terminals.............................................................................................9
2.3 Connection diagram - superheat control.........................................................................9
2.4 Installation......................................................................................................................10
2.5 Valve operation in parallel and complementary mode.................................................11
2.6 Shared pressure probe....................................................................................................11
2.7 Connecting the module EVBAT00400............................................................................11
2.8 Connecting the USB-tLAN converter..............................................................................11
2.9 Connecting the USB/RS485 converter............................................................................12
2.10 Upload, Download and Reset parameters (display)......................................................12
2.11 Show electrical connections (display)............................................................................12
2.12 General connection diagram..........................................................................................13
3. USER INTERFACE
46
Alarms.............................................................................................................................46
Alarm relay configuration...............................................................................................47
Probe alarms...................................................................................................................48
Control alarms.................................................................................................................48
EEV motor alarm.............................................................................................................49
LAN error alarm...............................................................................................................49
10. TROUBLESHOOTING
50
11. TECHNICAL SPECIFICATIONS
52
12. APPENDIX: VPM (VISUAL PARAMETER MANAGER)
53
12.1 Installation .....................................................................................................................53
12.2 Programming (VPM)......................................................................................................53
12.3 Copying the setup ..........................................................................................................54
12.4 Setting the default parameters.......................................................................................54
12.5 Updating the driver and display firmware.....................................................................54
14
3.1 Assembling the display board (accessory)....................................................................14
3.2 Display and keypad.........................................................................................................14
3.3 Display mode (display)...................................................................................................15
3.4 Programming mode (display)........................................................................................15
4. COMMISSIONING
4.1
4.2
4.3
4.4
4.5
4.6
16
Commissioning...............................................................................................................16
Setting the pLAN network address................................................................................16
Guided commissioning procedure (display)..................................................................17
Auxiliary refrigerant........................................................................................................19
Checks after commissioning...........................................................................................19
Other functions...............................................................................................................19
5. CONTROL
20
5.1 Main and auxiliary control..............................................................................................20
5.2 Superheat control............................................................................................................20
5.3 Adaptive control and autotuning...................................................................................21
5.4 Control with Emerson Climate Digital Scroll™ compressor ...........................................22
5.5 BLDC Control with compressor......................................................................................23
5.6 Superheat regulation with 2 temperature probes..........................................................23
5.7 Advanced regulation.......................................................................................................24
5.8 Programmable control....................................................................................................26
5.9 Control with refrigerant level sensor..............................................................................28
5.10 Auxiliary control .............................................................................................................28
6. FUNCTIONS
6.1
6.2
6.3
6.4
6.5
6.6
Power supply mode........................................................................................................31
Battery charge delay.......................................................................................................31
Network connection.......................................................................................................31
Inputs and outputs..........................................................................................................31
Control status ..................................................................................................................33
Advanced control status..................................................................................................35
7. PROTECTORS
7.1
31
36
Protectors........................................................................................................................36
8. PARAMETERS TABLE
39
8.1 Unit of measure...............................................................................................................43
8.2 Variables accessible via serial connection......................................................................44
8.3 Variables used based on the type of control.................................................................45
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1. INTRODUCTION
1.1 Models
EVD evolution is a driver for double pole stepper motors designed to
control the electronic expansion valve in refrigerant circuits. It is designed
for DIN rail assembly and is fitted with plug-in screw terminals. It controls
refrigerant superheat and optimises the efficiency of the refrigerant circuit,
guaranteeing maximum flexibility, being compatible with various types
of refrigerants and valves, in applications with chillers, air-conditioners
and refrigerators, the latter including subcritical and transcritical CO2
systems. It features low superheat (LowSH), high evaporation pressure
(MOP), low evaporation pressure (LOP) and high condensing temperature
protection (HiTcond) (also for CO2 cascade systems), and can manage, as
an alternative to superheat control, special functions such as the hot gas
bypass, the evaporator pressure control (EPR) and control of the valve
downstream of the gas cooler in transcritical CO2 circuits.
In the versions for CAREL valves, if integrated with a specific CAREL pCO
controller via LAN, the driver can control one of the following:
•
an electronic expansion valve in a refrigerant circuit with Emerson
Climate Technologies Digital Scroll™ compressor;
•
an electronic expansion valve in a refrigerant circuit with BLDC
compressor. In this case the compressor must be controlled by the
CAREL Power+ speed drive (with inverter), this in turn connected to
the pCO controller.
The EVD evolution driver can control an electronic expansion valve in
a refrigerant circuit with Digital Scroll compressor, if integrated with a
specific CAREL controller via LAN. In addition, it features adaptive control
that can evaluate the effectiveness of superheat control and if necessary
activate one or more tuning procedures. Together with superheat
control, it can manage an auxiliary control function selected between
condensing temperature protection and “modulating thermostat”. As
regards network connectivity, the driver can be connected to either of
the following:
• a pCO programmable controller to manage the controller via pLAN,
tLAN and RS485/Modbus®;
• a PlantVisorPRO supervisor via RS485/Modbus®. In this case, On/Off
control is performed via digital input 1 or 2, if suitably configured. As
well as control start/stop, digital inputs 1 and 2 can be configured for
the following:
- optimised valve control after defrost;
- Valve forced open (100%);
- control backup;
- control safety.
The second digital input is available for optimised defrost management.
Another possibility involves operation as a simple positioner with 4 to 20
mA or 0 to 10 Vdc analogue input signal. EVD evolution comes with a LED
board to indicate the operating status, or a graphic display (accessory) that
can be used to perform installation, following a guided commissioning
procedure involving setting just 4 parameters: refrigerant, valve, pressure
probe, type of main control (chiller, showcase, etc.). The procedure can
also be used to check that the probe and valve motor wiring is correct.
Once installation is complete, the display can be removed, as it is not
necessary for the operation of the driver, or alternatively kept in place to
display the significant system variables, any alarms and when necessary
set the control parameters. The driver can also be setup using a computer
via the service serial port. In this case, the VPM program (Visual Parameter
Manager) needs to be installed, downloadable from http://ksa.carel.com,
and the USB-tLAN converter EVDCNV00E0 connected.
Only on RS485/ Modbus® models can the installation procedure be
managed as described above by computer, using the serial port (see
paragraph 2.8) in place of the service serial port. The “universal” models
can drive all types of valves, while the CAREL models only drive CAREL
valves.
Code
EVD0000E00
EVD0000E01
EVD0000E10
EVD0000E11
EVD0000E20
EVD0000E21
Description
EVD evolution universal - tLAN
EVD evolution universal - tLAN, multiple pack of 10 pcs (*)
EVD evolution universal - pLAN
EVD evolution universal - pLAN, multiple pack of 10 pcs (*)
EVD evolution universal - RS485/Modbus®
EVD evolution universal - RS485/Modbus®, multiple pack of
10 pcs (*)
EVD0000E30 EVD evolution for CAREL valves - tLAN
EVD0000E31 EVD evolution for CAREL valves - tLAN, multiple pack 10
pcs (*)
EVD0000E40 EVD evolution for CAREL valves - pLAN
EVD0000E41 EVD evolution for CAREL valves - pLAN, multiple pack 10
pcs (*)
EVD0000E50 EVD evolution for CAREL valves - RS485/Modbus®
EVD0000E51 EVD evolution for CAREL valves - RS485/Modbus®, multiple
pack 10 pcs
EVD0002E10 EVD evolution universal - pLAN opto-isolated
EVD0002E20 EVD evolution universal - RS485/Modbus® opto-isolated
Tab. 1.a
(*)The codes with multiple packages are sold without connectors,
available separately in code EVDCON0021.
1.2 Functions and main characteristics
In summary:
• electrical connections by plug-in screw terminals;
• serial card incorporated in the driver, based on the model (tLAN, pLAN,
RS485/Modbus®);
• compatibility with various types of valves (“universal” models only) and
refrigerants;
• activation/deactivation of control via digital input 1 or remote control
via LAN, from pCO programmable controller;
• superheat control with protection functions for low superheat, MOP,
LOP, high condensing temperature;
• adaptive superheat control;
• function to optimise superheat control for air-conditioning units
fitted with Emerson Climate Digital Scroll™ compressor. In this case,
EVD Evolution must be connected to a CAREL pCO series controller
running an application program that can manage units with Digital
Scroll compressors. This function is only available on the controllers for
CAREL valves;
• configuration and programming by display (accessory), by computer
using the VPM program or by PlantVisor/PlantVisorPro supervisor and
pCO programmable controller;
• commissioning simplified by display with guided procedure for setting
the parameters and checking the electrical connections;
• multi-language graphic display, with “help” function on various
parameters;
• management of different units of measure (metric/imperial);
• parameters protected by password, accessible at a service (installer)
and manufacturer level;
• copy the configuration parameters from one driver to another using
the removable display;
• ratiometric or electronic 4 to 20 mA pressure transducer, the latter can
be shared between up to 5 drivers, useful for multiplexed applications;
• possibility to use S3 and S4 as backup probes in the event of faults on
the main probes S1 and S2;
• 4 to 20 mA or 0 to 10 Vdc input to use the driver as a positioner
controlled by an external signal;
• management of power failures with valve closing (only for drivers with
24 Vac power supply and connected to the EVD0000UC0 accessory);
• advanced alarm management.
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USB/RS485 converter (code CVSTDUMOR0)
The converter is used to connect the configuration computer and the
EVD evolution controllers, for RS485/Modbus® models only.
For software versions higher than 4.0, the following new functions have
been introduced:
• 24 Vac or 24 Vdc power supply, in the latter case without valve closing
in the event of power failures;
• pre-position time settable by parameter;
• use of digital to start/stop control when there is no communication
with the pCO programmable controller;
• possibility to control the electronic expansion valve in a refrigerant
circuit with brushless DC motor (BLDC) compressor, controlled by
CAREL Power+ speed drive (with inverter).
New functions have been introduced with software revision 5.0 and
higher:
• management of new refrigerants;
• possibility to manage CO2 cascade systems, setting the refrigerant on
the primary circuit and on the secondary circuit;
• high condensing temperature protection (Reverse HiTcond) for CO2
cascade systems;
• subcooling measurement;
• valve position in standby settable by parameter.
Fig. 1.b
Ultracap module (P/N EVD0000UC0)
The module, mounted on DIN rail, guarantees temporary power to the
driver in the event of power failures, for enough time to immediately
close the connected electronic valves (one or two). It avoids the need
to install a solenoid valve. The module is made using Ultracap storage
capacitors, which ensure reliability in terms of much longer component
life than a module made with lead batteries. In just 4 minutes the module
is ready to power two Carel valves again (or 5 minutes for pairs or other
brand valves).
New functions have been introduced with software revision 5.4 and
higher:
• programmable control, both superheat and special, and programmable
positioner: these functions exploit CAREL’s technology and know-how
in terms of control logic;
• custom refrigerant selection;
• control with level sensor for flooded evaporator;
• control with level sensor for flooded condenser.
From the software revision following the 7.2-7.3 new features have been
introduced, including:
• battery charge delay;
• external signal 0 ... 5 V (for programmable positioner).
SERIES OF ACCESSORIES FOR EVD EVOLUTION
Display (code EVDIS00**0)
Easily applicable and removable at any time from the front panel of
the driver, during normal operation displays all the significant system
variables, the status of the relay output and recognises the activation of
the protection functions and alarms. During commissioning, it guides
the installer in setting the parameters required to start the installation
and, once completed, can copy the parameters to other drivers. The
models differ in the first settable language, the second language for all
models is English. EVDIS00**0 can be used to configure and monitor all
the control parameters, accessible via password at a service (installer) and
manufacturer level.
Fig. 1.c
Valve cable E2VCABS*00 (IP67)
Shielded cable with built-in connector for connection to the valve motor.
The connector code E2VCON0000 (IP65) can also be purchased on its
own, to be wired.
Fig. 1.d
Float level sensor (P/N LSR0013000)
The level sensor measures the quantity of refrigerant in the heat
exchanger. This is used when controlling the valve based on the liquid
level in the flooded evaporator or condenser. Available with threaded or
flanged connector.
Fig. 1.a
USB/tLAN converter (code EVDCNV00E0)
The USB-tLAN converter is connected, once the LED board cover has
been removed, to the service serial port underneath. Fitted with cables
and connectors, it can connect EVD evolution directly to a computer,
which, using the VPM program, can configure and program the driver.
VPM can also be used to update the driver and display firmware.
Fig. 1.a
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8
ENG
2. INSTALLATION
2.3 Connection diagram - superheat control
2.1 DIN rail assembly and dimensions
4
Relay
4
2
3
1
EVD evolution
110
45
230 Vac
shield
11
2 AT
G
G0
VBAT
G
G0
1
3
2
4
DI2
Network
DI1
S4
S3
S2
S1
V REF
GND
13
S
24 Vac
20VA(*)
Analog – Digital Input
12
NOA
2
COMA
3
E X V connection
CAREL EXV
NO 1
1
Power Supply
COM 1
G
G0
VBAT
EVD evolution is supplied with screen-printed connectors to simplify
wiring.
GND
5
Tx/Rx
70
60
NET
EVDCNV00E0
Fig. 2.a
OPEN
CLOSE
4
EEV driver
PC
EVD4
EVD4 service USB adapter
7
4
DI1
DI2
S4
S2
S3
S1
GND
2
E XV connection A
GND Tx/Rx
NO A
3
COM A
VBAT
G0
G
1
Power Supply
VREF
6
2.2 Description of the terminals
Relay A
8 9
EVD evolution
10
Fig. 2.c
aa
(*) in combination with Alco EX7 or EX8 valves, use a 35 VA transformer
(code TRADRFE240)
Key:
Network
DI2
DI1
S4
S3
S2
S1
V REF
GND
Analog – Digital Input
1
2
3
4
5
6
7
8
9
10
11
12
13
GND
Tx/Rx
b
Fig. 2.b
Terminal
G, G0
VBAT
Description
Power supply
Emergency power supply
Functional earth
1,3,2,4
COM1, NO1
GND
VREF
S1
S2
S3
S4
DI1
DI2
Stepper motor power supply
Alarm relay
Earth for the signals
Power to active probes
Probe 1 (pressure) or 4 to 20 mA external signal
Probe 2 (temperature) or 0 to 10 V external signal
Probe 3 (pressure)
Probe 4 (temperature)
Digital input 1
Digital input 2
Terminal for tLAN, pLAN, RS485, Modbus® connection
Terminal for tLAN, pLAN, RS485, Modbus® connection
Terminal for pLAN, RS485, Modbus® connection
service serial port (remove the cover to access )
serial port
aa
b
green
yellow
brown
white
personal computer for configuration
USB/tLAN converter
adapter
ratiometric pressure transducer - evaporation pressure
NTC suction temperature
digital input 1 configured to enable control
free contact (up to 230 Vac)
solenoid valve
alarm signal
Note:
• connect the valve cable shield to the electrical panel earth;
• the use of the driver for the superheat control requires the use of the
evaporation pressure probe S1 and the suction temperature probe S2,
which will be fitted after the evaporator, and digital input 1/2 to enable
control. As an alternative to digital input 1/2, control can be enabled
via remote signal (tLAN, pLAN, RS485/Modbus®). For the positioning of
the probes relating to other applications, see the chapter on “Control”;
• inputs S1, S2 are programmable and the connection to the terminals
depends on the setting of the parameters. See the chapters on
“Commissioning” and “Functions”;
• pressure probe S1 in the diagram is ratiometric. See the general
connection diagram for the other electronic probes, 4 to 20 mA or
combined;
• four probes are needed for superheat control with BLDC compressors,
two to measure the superheat and two to measure the discharge
superheat and the discharge temperature. See chap. 5.
Tab. 2.a
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2.4 Installation
Important: earthing G0 and G on a driver connected to a serial
network will cause permanent damage to the driver.
For installation proceed as follows, with reference to the wiring diagrams:
1. connect the probes: the probes can be installed a maximum distance of
10 metres away from the driver, or a maximum of 30 metres as long as
shielded cables with a minimum cross-section of 1 mm² are used;
2. connect any digital inputs, maximum length 30 m;
3. connect the power cable to the valve motors: use 4-wire shielded cable
AWG 22 Lmax=10 m or AWG 14 Lmax=50m; failure to connect the
valve motors after connecting the driver will generate the “EEV motor
error” alarm: see paragraph 9.5;
4. carefully evaluate the maximum capacity of the relay output specified in
the chapter “Technical specifications”;
5. if necessary use a class 2 safety transformer, suitably protected against
short-circuits and voltage surges. For the power ratings see the
general connection diagram and the technical specifications.
6. the minimum size of the connection cables must be 0.5 mm2
7. power up the driver in the event of 24 Vdc power supply the drive will
close the valve.
24 Vac
230 Vac
2 AT
COMA
NOA
1
3
2
4
G
G0
VBAT
1
3
2
4
COMA
NOA
2 AT
G
G0
VBAT
COMA
NOA
NOA
COMA
1
3
2
4
G
G0
VBAT
Important: avoid installing the driver in environments with the
following characteristics:
• relative humidity greater than the 90% or condensing;
• strong vibrations or knocks;
• exposure to continuous water sprays;
• exposure to aggressive and polluting atmospheres (e.g.: sulphur
and ammonia fumes, saline mist, smoke) to avoid corrosion and/or
oxidation;
• strong magnetic and/or radio frequency interference (avoid installing
the appliances near transmitting antennae);
• exposure of the driver to direct sunlight and to the elements in general.
24 Vac
1
3
2
4
NOA
Installation environment
230 Vac
G
G0
VBAT
COMA
Fig. 2.g
Case 1: multiple drivers connected in a network powered by the same
transformer. Typical application for a series of drivers inside the same
electrical panel.
230 Vac
1
3
2
4
G
G0
VBAT
pCO
Drivers in a serial network
2 AT
2 AT
NO !
Important: in the event of 24 Vdc power supply set the “Power supply
mode” parameter=1 to start control. See par. 6.1.
8. program the driver, if necessary: see the chapter “User interface”;
9. connect the serial network, if featured: follow to the diagrams below for
the earth connection.
2 AT
24 Vac
230 Vac
24 Vac
COMA
NOA
1
3
2
4
G
G0
VBAT
COMA
NOA
1
3
2
4
COMA
NOA
1
3
2
4
G
G0
VBAT
Important: When connecting the driver, the following warnings
must be observed:
• if the driver is used in a way not specified in this manual, the level of
protection is not guaranteed.
• incorrect connection to the power supply may seriously damage the
driver;
• use cable ends suitable for the corresponding terminals. Loosen each
screw and insert the cable ends, then tighten the screws and lightly
tug the cables to check correct tightness;
• separate as much as possible (at least 3 cm) the probe and digital
input cables from the power cables to the loads so as to avoid possible
electromagnetic disturbance. Never lay power cables and probe cables
in the same conduits (including those in the electrical panels);
• install the shielded valve motor cables in the probe conduits: use
shielded valve motor cables to avoid electromagnetic disturbance to
the probe cables;
• avoid installing the probe cables in the immediate vicinity of power
devices (contactors, circuit breakers, etc.). Reduce the path of the
probe cables as much as possible and avoid enclosing power devices;
• avoid powering the driver directly from the main power supply in the
panel if this supplies different devices, such as contactors, solenoid
valves, etc., which will require a separate transformer;
• * EVD EVO is a control to be incorporated in the end equipment, do
not use for flush mount
• * DIN VDE 0100: Protective separation between SELV circuit and other
circuits must be guaranteed. The requirements according to DIN VDE
0100 must be fulfilled. To prevent infringement of the protective
separation (between SELV circuit to other circuits) an additional fixing
has to be provided near to the terminals. This additional fixing shall
clamp the insulation and not the conductor”.
2 AT
G
G0
VBAT
2 AT
2 AT
pCO
230 Vac
24 Vac
Fig. 2.d
2 AT
2 AT
2 AT
COMA
NOA
1
3
2
4
G
G0
VBAT
COMA
NOA
1
3
2
4
G
G0
VBAT
COMA
NOA
1
3
2
4
G
G0
VBAT
pCO
COMA
NOA
COMA
NOA
G
G0
VBAT
1
3
2
4
COMA
NOA
230 Vac
pCO
1
3
2
4
2 AT
COMA
NOA
2 AT
G
G0
VBAT
24 Vac
2 AT
1
3
2
4
24 Vac
G
G0
VBAT
pCO
230 Vac
24 Vac
230 Vac
COMA
NOA
G
G0
VBAT
1
3
2
4
COMA
NOA
230 Vac
COMA
NOA
2 AT
G
G0
VBAT
2 AT
1
3
2
4
24 Vac
2 AT
G
G0
VBAT
24 Vac
230 Vac
1
3
2
4
G
G0
VBAT
COMA
NOA
230 Vac
24 Vac
1
3
2
4
230 Vac
230 Vac
1
3
2
4
G
G0
VBAT
COMA
NOA
1
3
2
4
G
G0
VBAT
Case 2: multiple drivers connected in a network powered by different
Vac
230 Vac
transformers
(G0230not
connected230toVacearth). Typical application for a series
24 Vac
24 Vac
24 Vac
of drivers 2in
different electrical
panels.
pCO
2 AT
2 AT
AT
230 Vac
24 Vac
24 Vac
2 AT
2 AT
Fig. 2.e
24 Vac
pCO
2 AT
COMA
NOA
1
3
2
4
G
G0
VBAT
G
G0
VBAT
G
G0
VBAT
COMA
NOA
COMA
NOA
COMA
NOA
1
3
2
4
1
3
2
4
1
3
2
4
G
G0
VBAT
Case 3: multiple drivers connected in a network powered by different
230 Vac
230 Vac
230 Vac
transformers
with just one24 Vac
earth point. Typical
application for a series of
24 Vac
24 Vac
drivers in different electrical
panels.
2 AT
2 AT
230 Vac
COMA
NOA
1
3
2
4
G
G0
VBAT
COMA
NOA
COMA
NOA
pCO
G
G0
VBAT
COMA
NOA
1
3
2
4
2 AT
G
G0
VBAT
24 Vac
2 AT
COMA
NOA
24 Vac
2 AT
1
3
2
4
24 Vac
G
G0
VBAT
pCO
230 Vac
1
3
2
4
230 Vac
1
3
2
4
G
G0
VBAT
2 AT
pCO
Fig. 2.f
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
10
ENG
2.5 Valve operation in parallel and
complementary mode
2.7 Connecting the module EVBAT00400
The EVBAT00400 module can close the valve in the event of power failures.
Digital input 1/2 can be configured to detect the “Discharged battery”
alarm.
EVBAT00500
G
G0
VBAT
EVD evolution can control two CAREL valves connected together
(see paragraph 4.2), in parallel mode, with identical behaviour, or in
complementary mode, whereby if one valve opens, the other closes by
the same percentage. To achieve such behaviour, simply set the “valve”
parameter (“Two EXV connected together”) and connect the valve motor
power supply wires to the same connector. In the example shown below,
for operation of valve B_2 with valve B_1 in complementary mode simply
swap the connection of wires 1 and 3.
EVD Battery module
EVBAT00400
+
GND
BAT ERR
4 AT
2 CAREL valves connected in complementary mode
CAREL EXV
VALVE B_1
CAREL EXV
VALVE B_1 4
2
43
12
3
1
EVD evolution
2
43
12
3
1
CAREL EXV
VALVE A_2
CAREL EXV
VALVE A_2 4
2
43
12
3
1
GND
CAREL EXV
VALVE B_2
CAREL EXV
VALVE B_2 4
2
41
32
1
3
DI1
DI2
CAREL EXV
VALVE A_1
CAREL EXV
VALVE A_14
G
G0
VBAT
2 CAREL valves connected in parallel
mode
24 Vac
230 Vac
2 AT
35 VA
TRADRFE240
1 3 2 4
1 3 2 4
1 3 2 4
1 3 2 4
Fig. 2.j
Note: set the “Battery charge delay” parameter, depending on the
application. See the chapter “Functions”.
Fig. 2.h
2.8 Connecting the USB-tLAN converter
Note: operation in parallel and complementary mode can only be
used for CAREL valves, within the limits shown in the table below, where
OK means that the valve can be used with all refrigerants at the rated
operating pressure.
CAREL valve model
E2V* E3V*
Two EXVs OK E3V45,
conMOPD = 35 bars
nected
E3V55,
together
MOPD = 26 bars
E3V65,
MOPD = 20 bars
E4V*
E4V85,
MOPD = 22 bars
E4V95,
MOPD = 15 bars
Procedure:
• remove the LED board cover by pressing on the fastening points;
• plug the adapter into the service serial port;
• connect the adapter to the converter and then this in turn to the
computer.
• power up the driver.
E5V* E6V* E7V*
NO NO NO
press
EVD ev
olu tio
n
OPEN
Note: MOPD = Maximum Operating-Pressure Differential
CLOSE
2.6 Shared pressure probe
press
Only 4 to 20 mA pressure probes (not ratiometric) can be shared. The
probe can be shared by a maximum of 5 drivers. For multiplexed systems
where controllers EVD evolution1 to EVD evolution5 share the same
pressure probe, choose the normal option for EVD evolution1 and the
“remote” option for the other drivers, up to the fifth. EVD evolution6 must
use another pressure probe P2.
EVD Evolution6
OPEN
DI1
DI2
S4
GND Tx/Rx
4
DI1
DI2
S4
S2
S3
S1
VREF
GND
service serial port
adapter
3
4
USB/tLAN converter
personal computer
Note: when using the service serial port connection, the VPM
program can be used to configure the driver and update the driver and
display firmware, downloadable from http://ksa.carel.com.
See the appendix.
Fig. 2.i
P1
P2
PC
EVD4
1
2
P2
GND Tx/Rx
Fig. 2.l
GND Tx/Rx
Key:
P1
CLOSE
3
EVD Evolution 6
GND
VREF
S1
S2
S3
DI1
DI2
S4
DI1
DI2
S4
GND
VREF
S1
S2
S3
GND Tx/Rx
GND
VREF
S1
S2
S3
EVD Evolution 5
EEV driver
Probe S1 -0.5 to 7 barg (P1) to remote, -0.5 to 7 barg -0.5 to 7 barg (P2)
EVD Evolution 1
4
NET
2
EVD4 service USB adapter
to EVD Evolution5
2
1
EVDCNV00E0
EVD Evolution1
3
NOA
G
G0
VBAT
4
EXAMPLE
Key:
1
COMA
Fig. 2.k
Shared pressure probe
Pressure probe
11
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
ENG
2.9 Connecting the USB/RS485 converter
1 3 2 4
COMA
NOA
G
G0
VBAT
Only on EVD evolution RS485/Modbus® models can the configuration
computer be connected using the USB/RS485 converter and the serial
port, according to the following diagram.
NET
1
OPEN
CLOSE
EVD evolution
DI1
DI2
S4
S2
S3
S1
VREF
GND
Analog - Digital Input
Network
2
GND Tx/Rx
shield
Fig. 2.m
Key:
1
2
personal computer for configuration
USB/RS485 converter
Note:
• the serial port can be used for configuration with the VPM program and
for updating the driver firmware, downloadable from http://ksa.carel.
com;
• to save time, up to 8 EVD evolution drivers can be connected to the
computer, updating the firmware at the same time (each driver must
have a different network address).
2.10 Upload, Download and Reset parameters
(display)
Procedure:
10. press the Help and Enter buttons together for 5 seconds;
11. a multiple choice menu will be displayed, use UP/DOWN to select the
required procedure;
12. confirm by pressing ENTER;
13. the display will prompt for confirmation, press ENTER;
14. at the end a message will be shown to notify the operation if the operation
was successful.
• UPLOAD: the display saves all the values of the parameters on the source
driver;
• DOWNLOAD: the display copies all the values of the parameters to the
target driver;
• RESET: all the parameters on the driver are restored to the default values.
See the table of parameters in chapter 8.
UPLOAD
DOWNLOAD
RESET
Fig. 2.n
Important:
• the procedure must be carried out with driver powered;
• DO NOT remove the display from the driver during the UPLOAD,
DOWNLOAD, RESET procedure;
• the parameters cannot be downloaded if the source driver and the
target driver have incompatible firmware.
2.11 Show electrical connections (display)
To display the probe and valve electrical connections for drivers A and B,
enter display mode. See paragraph 3.3.
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
12
ENG
2.12 General connection diagram
CASE 3:
24 Vdc power supply
CAREL EXV
G
G0
VBAT
H
2
EVD0000UC0
Sporlan
SEI / SEH / SER
1
1
EVD
ULTRACAP
2 AT
3
G
3
4
2
2
4
1
24 Vac
S
15
3
4
15
12
NOA
COMA
4
GND
G
G0
pCO
shield
GND
CASE 2:
230 Vac power
supply without
emergency
module
2
EVD evolution
2 AT
20 VA (*)
3
without battery
230 Vac
4
4
13
1
G
G0
VBAT
A
16
14
11
with battery
G
G0
VBAT
35 VA
TRADRFE240
1
ALCO
EX5/6
EX7/8
G0
shield
2 AT
14
15
DANFOSS
ETS/ CCMT
COMA
NOA
24 Vac
pCO
EVDCNV00E0
shield
GND Tx/Rx
GND
DI1
DI2
S4
S2
S3
S1
7
5
VREF
4
PC
EEV driver
EVD4
EVD4 service USB adapter
GND
230 Vac
G
G0
VBAT
Tx/Rx
CASE 1:
230 Vac power supply with emergency module
pCO
6
Modbus®
RS485
shield
1
15
2
4
S4
DI1
DI2
DI1
DI2
S3
S1
S2
L
VREF
GND Tx/Rx
GND Tx/Rx
4
14
GND
DI1
DI2
S4
S2
S3
S1
G
VREF
GND Tx/Rx
GND
DI1
DI2
S4
S3
S2
S1
VREF
GND
F
S3
1
15
D
GND Tx/Rx
S4
4
S1
E
S2
DI1
DI2
GND Tx/Rx
VREF
10
17
CVSTDUM0R0
GND
9
S4
S2
S1
C
VREF
GND Tx/Rx
GND
DI1
DI2
S4
S3
S1
3
S2
VREF
B
GND
8
S3
EVD0000E0*: tLAN version
EVD0000E1*: pLAN version
EVD0000E2*: RS485 version
1
14
Fig. 2.o
Key:
1
2
3
4
5
6
7
8
9
green
yellow
brown
white
configuration computer
USB/tLAN converter
adapter
ratiometric pressure
transducer
NTC probe
10
11
12
13
14
15
16
17
A
B
digital input 1 configured to enable
control
free contact (up to 230 Vac)
solenoid valve
alarm signal
red
black
blue
configuration/supervision computer
C
D
E
F
G
H
L
Note: for the configuration of the digital inputs see par. 6.3.
(*): in combination with Alco EX7 or EX8 valves, use a 35 VA transformer code
TRADRFE240.
13
Connection to EVD0000UC0
Connection to electronic pressure probe (SPK**0000) or piezoresistive pressure transducer (SPKT00**C0)
Connection as positioner (0 to 10 Vdc input)
Connection as positioner (4 to 20 mA input)
Connection to combined pressure/temperature probe (SPKP00**T0)
Connection to backup probes (S3, S4)
Ratiometric pressure transducer connections (SPKT00**R0)
Connections o other types of valves
Connection to float level sensor (P/N LSR00*3000)
The maximum length of the connection cable to the EVD0000UC0
1
module is 5 m.
The connection cable to the valve motor must be 4-wire shielded,
2
AWG 22 with Lmax= 10 m, AWG 14 con Lmax= 50 m
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
ENG
3. USER INTERFACE
3.2 Display and keypad
The user interface consists of 5 LEDs that display the operating status, as
shown in the table:
The graphic display shows 2 system variables, the control status of the
driver, the activation of the protectors, any alarms and the status of the
relay output.
7
EVD evolution
1
Surriscaldam.
2
Apertura
valvola
4.9 K
44 %
ON
T MOP
ALARM
-- Rele
6
5
4
3
Key:
LED
NET
OPEN
CLOSE
Fig. 3.a
ON
OFF
Connection available No connection
Opening valve
Closing valve
Active alarm
-
Driver powered
Driver not powered
Flashing
Communication
error
Driver disabled (*)
Driver disabled (*)
-
1
2
3
4
5
6
7
Wrong power supply
(see chap. Alarms)
Display writings
Tab. 3.a
(*) Awaiting completion of the initial configuration
3.1 Assembling the display board (accessory)
The display board, once installed, is used to perform all the configuration
and programming operations on the driver. It displays the operating
status, the significant values for the type of control that the driver
is performing (e.g. superheat control), the alarms, the status of the
digital inputs and the relay output. Finally, it can save the configuration
parameters for one driver and transfer them to a second driver (see the
procedure for upload and download parameters).
For installation:
• remove the cover, pressing on the fastening points;
• fit the display board, as shown;
• the display will come on, and if the driver is being commissioned, the
guided configuration procedure will start.
1st variable displayed
2nd variable displayed
relay status
alarm (press “HELP”)
protector activated
control status
adaptive control in progress
ON
OFF
Control status
Operation
Standby
LowSH
LOP
POS
Positioning
MOP
WAIT
Wait
HiTcond
CLOSE
INIT
Closing
Valve motor error
recognition procedure (*)
Tuning in progress
TUN
Protection active
Low superheat
Low evaporation
temperature
High evaporation
temperature
High condensing
temperature
Tab. 3.b
(*) The valve motor error recognition procedure can be disabled. See
paragraph 9.5
Keypad
Button Function
Prg
opens the screen for entering the password to access programming mode.
• if in alarm status, displays the alarm queue;
• in the “Manufacturer” level, when scrolling the parameters, shows
the explanation screens (Help).
Esc
• exits the Programming (Service/Manufacturer) and Display
modes;
• after setting a parameter, exits without saving the changes.
• navigates the display screens;
• increases/decreases the value.
UP/
DOWN
• switches from the display to parameter programming mode;
• confirms the value and returns to the list of parameters.
Enter
Tab. 3.c
press
press
Fig. 3.b
Note: the variables displayed as standard can be selected by
configuring the parameters “Display main var. 1” and “Display main var. 2”
accordingly. See the list of parameters.
Important: the driver is not activated if the configuration procedure
has not been completed.
The front panel now holds the display and the keypad, made up of 6
buttons that, pressed alone or in combination, are used to perform all the
configuration and programming operations on the driver.
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
Fig. 3.c
Key:
14
ENG
3.3 Display mode (display)
Modifying the Manufacturer parameters
The Manufacturer level is used to configure all the driver parameters,
and consequently, in addition to the Service parameters, the parameters
relating to alarm management, the probes and the configuration of the
valve. See the table of parameters.
Procedure:
1. press Esc one or more times to switch to the standard display;
2. press Prg: the display shows a screen with the PASSWORD request;
3. press ENTER and enter the Manufacturer level password: 66, starting from
the right-most figure and confirming each figure with ENTER;
4. if the value entered is correct, the list of parameter categories is shown:
- Configuration
- Probes
- Control
- Special
- Alarm configuration
- Valve
5. press the UP/DOWN buttons to select the category and ENTER to access
the first parameter in the category;
6. press UP/DOWN to select the parameter to be set and ENTER to move to
the value of the parameter;
7. press UP/DOWN to modify the value;
8. press ENTER to save the new value of the parameter;
9. repeat steps 6, 7, 8 to modify the other parameters;
10. press Esc to exit the procedure for modifying the Manufacturer
parameters.
Display mode is used to display the useful variables showing the
operation of the system.
The variables displayed depend on the type of control selected.
1. press Esc one or more times to switch to the standard display;
2. press UP/DOWN: the display shows a graph of the superheat, the
percentage of valve opening, the evaporation pressure and
temperature and the suction temperature variables;
3. press UP/DOWN: the variables are shown on the display, followed by the
screens with the probe and valve motor electrical connections;
4. press Esc to exit display mode.
For the complete list of the variables shown on the display, see the
chapter: “Table of parameters”.
SH=4.9K
211stp
69%
6.4°C
3.8barg
1.5°C
Fig. 3.d
3.4 Programming mode (display)
CONFIGURATION
PROBES
CONTROL
SPECIAL
ALARM CONFIGURATION
VALVE
The parameters can be modified using the front keypad. Access differs
according to the user level: Service (Installer) and manufacturer.
Modifying the Service parameters
IThe Service parameters, as well as the parameters for commissioning
the driver, also include those for the configuration of the inputs, the relay
output, the superheat set point or the type of control in general, and the
protection thresholds. See the table of parameters.
Procedure:
1. press Esc one or more times to switch to the standard display;
2. press Prg: the display shows a screen with the PASSWORD request;
3. press ENTER and enter the password for the Service level: 22, starting
from the right-most figure and confirming each figure with ENTER;
4. if the value entered is correct, the first modifiable parameter is displayed,
network address;
5. press UP/DOWN to select the parameter to be set;
6. press ENTER to move to the value of the parameter;
7. press UP/DOWN to modify the value;
8. press ENTER to save the new value of the parameter;
9. repeat steps 5, 6, 7, 8 to modify the other parameters;
10. press Esc to exit the procedure for modifying the Service parameters.
Fig. 3.f
Note:
• all the driver parameters can be modified by entering the Manufacturer
level;
• if when setting a parameter the value entered is out-of-range, this is
not accepted and the parameter soon after returns to the previous
value;
• if no button is pressed, after 5 min the display automatically returns to
the standard mode.
PASSWORD
0001
Fig. 3.e
Note:
• if when setting a parameter the value entered is out-of-range, this is
not accepted and the parameter soon after returns to the previous
value;
• if no button is pressed, after 5 min the display automatically returns to
the standard mode;
• to set a negative value move to the left-most digit and press Up/Down.
15
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
ENG
4. COMMISSIONING
4.2 Setting the pLAN network address
Important: if the refrigerant is not available among the refrigerant
parameter options, contact CAREL service to:
1. confirm that the system: pCO controller + CAREL electronic expansion
valve is compatible with the desired refrigerant (custom);
2. identify the values that define the custom refrigerant and enter them for
parameters: “Dew a…f high/low” and “Bubble a…f high/low”. See
the parameter table.
The pLAN addresses of the devices in the network must be assigned
according to the following rule:
the EVD Evolution driver addresses must be assigned in increasing order
from left to right, starting with the controllers (A), then the drivers (B) and
finally the terminals (C).
ADDR = 31
ADDR = 32
pGD
4.1 Commissioning
Once the electrical connections have been completed (see the chapter
on installation) and the power supply has been connected, the operations
required for commissioning the driver depend on the type of interface
used, however essentially involve setting just 4 parameters: refrigerant,
valve, type of pressure probe S1 and type of main control.
Types of interfaces:
• DISPLAY: after having correctly configured the setup parameters,
confirmation will be requested. Only after confirmation will the driver
be enabled for operation, the main screen will be shown on the display
and control will be able to commence when requested by the pCO
controller via LAN or when digital input DI1/DI2 closes. See paragraph
4.2;
• VPM: to enable control of the driver via VPM, set “Enable EVD control”
to 1; this is included in the safety parameters, in the special parameters
menu, under the corresponding access level. However, the setup
parameters should first be set in the related menu. The driver will then
be enabled for operation and control will be able to commence when
requested by the pCO controller via LAN or when digital input DI1/
DI2 closes. If due to error or for any other reason “Enable EVD control”
should be set to 0 (zero), the driver will immediately stop control and
will remain in standby until re-enabled, with the valve stopped in the
last position;
• SUPERVISOR: to simplify the commissioning of a considerable number
of drivers using the supervisor, the setup operation on the display can
be limited to simply setting the network address. The display will then
be able to be removed and the configuration procedure postponed to a
later stage using the supervisor or, if necessary, reconnecting the display.
To enable control of the driver via supervisor, set “Enable EVD control”;
this is included in the safety parameters, in the special parameters menu,
under the corresponding access level. However, the setup parameters
should first be set in the related menu. The driver will then be enabled
for operation and control will be able to commence when requested
by the pCO controller via pLAN or when digital input DI1/DI2 closes.
As highlighted on the supervisor, inside of the yellow information field
relating to the “Enable EVD control” parameter, if due to error or for
any other reason “Enable EVD control” should be set to 0 (zero), the
driver will immediately stop control and will remain in standby until
re-enabled, with the valve stopped in the last position;
• pCO PROGRAMMABLE CONTROLLER: the first operation to be
performed, if necessary, is to set the network address using the display.
OK
EVD
4
NO 1
COM 1
G0
2
Relay
B
DI2
Network
DI1
S4
S3
S2
S1
Analog – Digital Input
Tx/Rx
EVD
EVD
3
E XV connection
ADDR=12
GND
DI2
GND
1
Power Supply
Network
DI1
S4
S3
S2
V REF
Tx/Rx
VBAT
G
Relay
V REF
4
NO 1
COM 1
G
G0
VBAT
2
Analog – Digital Input
GND
DI2
GND
3
E XV connection
ADDR=11
Network
DI1
S4
S3
S2
Tx/Rx
1
Power Supply
Relay
S1
4
NO 1
COM 1
G0
2
Analog – Digital Input
GND
DI2
DI1
S4
S3
S2
V REF
S1
GND
3
E XV connection
ADDR=10
Network
GND
1
Power Supply
ADDR = 9
Analog – Digital Input
VBAT
G
Relay
S1
4
E XV connection
V REF
2
NO 1
3
COM 1
G
G0
VBAT
3
1
Power Supply
GND
Tx/Rx
EVD
GND
CANL
CANH
GND
CANL
CANH
2
pCO
A
U3
U2
U1
+5 VREF
GND
G0
+Vterm
G
U3
U1
U2
ADDR = 2
+5 VREF
G0
GND
+Vterm
G
ADDR = 1
pCO
pCO
1
Fig. 4.a
Important: if the addresses are not assigned in this way, as for
example shown in the following figure, malfunctions will occur if one of
the pCO controllers is offline.
ADDR = 31
ADDR = 32
pGD
C
pGD
EVD
4
NO 1
VBAT
COM 1
2
Relay
B
Network
DI2
DI1
S4
S3
S2
S1
Analog – Digital Input
Tx/Rx
EVD
EVD
3
E XV connection
ADDR=18
GND
DI2
GND
1
Power Supply
Network
DI1
S4
S3
S2
S1
Tx/Rx
G0
G
Relay
V REF
4
NO 1
COM 1
G
G0
VBAT
2
Analog – Digital Input
GND
GND
3
E XV connection
ADDR=10
Network
DI2
DI1
S4
S3
S2
Tx/Rx
1
Power Supply
Relay
V REF
4
NO 1
COM 1
G0
2
Analog – Digital Input
GND
DI2
DI1
S4
S3
S2
S1
V REF
GND
3
E XV connection
ADDR=17
Network
GND
1
Power Supply
ADDR = 9
Analog – Digital Input
VBAT
G
Relay
S1
4
V REF
2
E XV connection
NO 1
3
COM 1
VBAT
G
G0
3
1
Power Supply
GND
Tx/Rx
EVD
GND
CANL
CANH
GND
CANL
CANH
2
Important: for the driver with pLAN serial port, see the
guidelines described in the following paragraph for setting the address.
pCO
Fig. 4.b
U3
U2
U1
+5 VREF
GND
G0
+Vterm
G
U2
U3
pCO
1
16
A
ADDR = 2
U1
+5 VREF
GND
+Vterm
G
pCO
G0
ADDR = 1
If a pLAN, tLAN or RS485/Modbus® driver is used, connected to a pCO
family controller, the setup parameters will not need to be set and
confirmed. In fact, the application running on the pCO will manage the
correct values based on the unit controlled. Consequently, simply set the
pLAN, tLAN or RS485/Modbus® address for the driver as required by the
application on the pCO, and after a few seconds communication will
commence between the two instruments and the driver automatically
be enabled for control. The main screen will shown on the display, which
can then be removed, and control will be able to commence when
requested by the pCO controller or digital input DI1/DI2. If there is no
communication between the pCO and the driver (see the paragraph
“LAN error alarm”), the driver will be able to continue control based on
the status of digital input DI1/DI2. See par. 6.3.
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
C
pGD
NO!
ENG
4.3 Guidedcommissioningprocedure(display)
CONFIGURATION
Network address
198
1
207
white
white
black
black
green
green
-
TxRx
1/3
1/3
DI1
DI2
Configurtion
Configurtion
Network
address
Network
address
198
198
198
198
DI2
GND
TxRx
GND
1/3
1/3
GND
VREF
GND
S1
VREF
S2
S1
Networkaddress
address
Network
S2
S3
S4
S3
DI1
S4
The network address assigns to the driver an address for the serial
connection to a supervisory system via RS485, and to a pCO controller via
Configurtion
1/3
Configurtion
1/3
Configurtion
1/3
Configurtion
1/3
pLAN, tLAN,
RS485/Modbus®.
Networkaddress
address
Network
address
Network
Network
address
Parameter/description 1 1
Def.
Min.
Max.
UOM
1 1
After having fitted the display:
Configurtion
Configurtion
Network address
TEMP
TEMP
S2 S2
PRESS
PRESS
S1 S1
Tab. 4.d
For network connection of the RS485/Modbus® models the
communication speed also needs to be set, in bits per second, using the
parameter “Network settings”. See paragraph 6.2.
Πthe first parameter is displayed: w press UP/DOWN to modify the
network address;
value
v press Enter to move to the
value of the parameter
Network address
1/3
Refrigerant
greengreen
G
G0
VBAT
G
G0
1
VBAT
3
12
34
1/3
COM1
NO1
1
3
2
4
G
G0
VBAT
DI2
GND
TxRx
S3
S4
DI1
Parameter/description
Def.
CONFIGURATION
Refrigerant:
R404A
 press Enter to confirm the value  press UP/DOWN to move to the
0= custom; 1= R22; 2= R134a; 3= R404A; 4= R407C; 5= R410A; 6=
next parameter, refrigerant
R507A; 7= R290; 8= R600; 9= R600a; 10= R717; 11= R744; 12= R728;
‘ repeat steps 2, 3, 4, 5 to modify the values of the parameters:
13= R1270; 14= R417A; 15= R422D; 16= R413A; 17= R422A; 18=
refrigerant, valve, pressure probe S1, main regulation;
R423A; 19= R407A; 20= R427A; 21=R245Fa; 22=R407F; 23=R32;
24=HTR01 ; 25=HTR02; 26=R23; 1= R22; 2= R134a; 3= R404A; 4=
Configurtion
green
brown
End configuration?
R407C;
5= R410A;6= R507A; 7= R290; 8= R600; 9= R600a; 10=
yellow
YES
NO
white
TEMP S2
R717; 11= R744; 12= R728; 13= R1270; 14= R417A; 15= R422D; 16=
white
PRESS S1
black
R413A; 17= R422A; 18= R423A; 19= R407A; 20= R427A; 21=R245Fa;
green
22=R407F; 23=R32; 24=HTR01; 25=HTR02; 26=R23; 27 = R1234yf;
28 = R1234ze; 29 = R455A; 30 = R170; 31 = R442A; 32 = R447A; 33
= R448A; 34 = R449A; 35 = R450A; 36 = R452A; 37 = R508B; 38 =
’ check that the electrical connections are correct;
R452B; 39 = R513A; 40 = R454B; 41 = R458A
“ if the configuration is correct
Tab. 4.e
Configurtion
exit the procedure, otherwise
End configuration?
Note:
YES
NO
choose NO and return to step 2;
• for CO2 cascade systems, at the end of the commissioning procedure
also set the auxiliary refrigerant. See the following paragraph.
• if the refrigerant is not among those available for the “Refrigerant”
parameter:
1. set any refrigerant (e.g. R404);
At the end of the configuration procedure the controller activates the
2. select the model of valve, the pressure probe S1, the type of main
valve motor error recognition procedure, showing “INIT” on the display.
control and end the commissioning procedure;
See paragraph 9.5
3. enter programming mode and set the type of refrigerant: custom, and
To simplify commissioning and avoid possible malfunctions, the driver
the parameters “Dew a…f high/low” and “Bubble a…f high/low”
will not start until the following have been configured:
that define the refrigerant;
1. network
address; 1/31/3
Configurazione
1/3
Configurazione
1/3
Configurazione
1/3
Configurazione
Configurazione
Configurazione
Configurazione
1/3
Configurazione
1/3
Configurazione
Configurazione
4.rete start1/3
control,
for example
by di
closing
to enable 2/32/3
Indirizzodidirete
rete
Indirizzo
direte
retethe digital input contact
Indirizzo
Indirizzo
rete
Refrigerante
Indirizzo
Indirizzo
Indirizzo
di di
rete
Indirizzo
di di
rete
Refrigerante
2. refrigerant;
198
198
1
R22
198
198
1 1
1
R22
operation.
3. valve;
Valvola
Valvola
Carel
Carel
4. pressure probe S1;
5. type of main control, that is, the type of unit the superheat control is
Valve
applied to.
Setting the type of valve automatically defines all the control parameters
based on the manufacturer’s data for each model.
Note:
In Manufacturer programming mode, the control parameters can then
• to exit the guided commissioning procedure press the DOWN button
be fully customised if the valve used is not in the standard list. In this case,
repeatedly and finally confirm that configuration has been completed.
the driver will detect the modification and indicate the type of valve as
The guided procedure CANNOT be ended by pressing Esc;
1/3
Configurazione
1/3 error, access
Configurazione
2/3
Configurazione“Customised”.
2/3
Configurazione
3/3
• if Configurazione
the configuration procedure
ends
with a configuration
GND
VREF
S1
S2
1/3
Indirizzo di rete
Indirizzo di rete
Refrigerante
1
1
R22
Service
parameter programming mode
and modify the value of the
parameter in question;
Valvola
Carel
• if the valve and/or the pressure probe used are not available in the
list, select any model and end the procedure. Then the driver will
be enabled for control, and it will be possible to enter Manufacturer
programming mode and set the corresponding parameters manually.
1/3
2/3
Configurtion
brownbrown
End configuration?
yellowyellow
The type of refrigerant is essential
for calculating the
superheat.
In
YES
NO
white white
TEMP TEMP
S2 S2
white whiteaddition, it is used to calculate the evaporation and condensing
PRESSPRESS
S1 S1
black black
green greentemperature based on the reading of the pressure probe.
1
2
COM1
4
NO1
1
Configurtion
COM1
NO1
1/3
DI2
TxRx
GND
TxRx
Configurtion
Network address
GND
VREF
S1
GND
S2
VREF
S1
S3
S2
S4
DI1
S3
S4
DI2
DI1
GND
1/3
Refrigerante
Sonda pressione S1
Non utilizzata
Parameter/descriptionR134a
Def.
Valvola
Regolazione principale
CONFIGURATION
Carel
Banchi frigo/cella canalizzati
Valve:
CAREL
0=custom ; 1= CAREL EXV; 2= Alco EX4; 3= Alco EX5; 4= Alco EX6; 5= EXV
Alco EX7; 6= Alco EX8 330Hz suggested by CAREL; 7= Alco EX8 500Hz
specified by Alco; 8=Sporlan SEI 0.5-11; 9= Sporlan SER 1.5-20; 10=
Sporlan SEI 30; 11= Sporlan SEI 50; 12= Sporlan SEH 100; 13= Sporlan
SEH 175; 14= Danfoss ETS 12.5-25B; 15= Danfoss ETS 50B; 16= Danfoss
Important: for 24 Vdc power supply, at the end of the guided
ETS 100B; 17= Danfoss ETS 250; 18= Danfoss ETS 400; 19= two CAREL
commissioning procedure, to start control set “Power supply mode”
ExV connected together 20= Sporlan Ser(I)G, J, K.; 21= Danfoss CCM
parameter=1, otherwise the valve remains in the closed position. See
10-20-30; 22= Danfoss CCM 40; 23=Danfoss CCMT 2-4-8; 24 =
Configurazione
2/3
Configurazione
2/3
Configurazione
3/3
Configurazione
3/3
paragraph
6.1.
Disabled;
25= CAREL Ejector
Refrigerante
Refrigerante
Sonda pressione
S1
SondaE2J17AS1N0;
pressione S1 26= CAREL Ejector
R22
R134a
Non utilizzata
Non utilizzata
E2J23AT1N0; 27= CAREL Ejector E3J26AT2N0; 28= CAREL Ejector
Valvola
Valvola
Regolazione principale
principale 30= CAREL Ejector
E3J33AU2N0; 29= CAREL Regolazione
Ejector E3J39AV3N0;
Carel
Carel
Banchi frigo/cella canalizzati
Banchi frigo/cella canalizzati
E6J50AV3N0; 31= Danfoss CCMT 16; 32= Danfoss CCMT 24; 33=
Danfoss CCMT 30; 34= Danfoss CCMT 42; 35= Danfoss Colibri
Tab. 4.f
Configurazione
Sonda pressione S1
3/3
Non utilizzata
Regolazione principale
Banchi frigo/cella canalizzati
Configurazione
Sonda pressione S1
Non utilizzata
Note: select Valve = disabled if Main control = I/O expansion for
pCO to prevent the EEV motor error from being displayed.
I/O expansion
Configurazione
3/3
Regolazione principale
Banchi frigo/cella canalizzati
17
Configurazione terminata?
SI
NO
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
ENG
for pCO control can be selected at the end of the commissioning
procedure, by entering programming mode.
the chapter on “Functions” and the list of parameters). In any case,
in manufacturer programming mode, the limits for the probe alarm
signal can be customised.
Main control
Important:
• two CAREL EXV valves connected together must be selected if two
Setting the main control defines the operating mode of the driver.
CAREL EXV valves are connected to the same terminal, to have parallel
or complementary operation;
• as described, control is only possible with CAREL EXV valves;
• not all CAREL valves can be connected: see paragraph 2.5.
Parameter/description
CONFIGURATION
Main control
Superheat control
1= multiplexed cabinet/cold room
2= cabinet/cold room with on-board compressor
3= “perturbed” cabinet/cold room
4= cabinet/cold room with subcritical CO2
5= R404A condenser for subcritical CO2
6= air-conditioner/chiller with plate heat exchanger
7= air-conditioner/chiller with tube bundle heat exchanger
8= air-conditioner/chiller with finned coil heat exchanger
9= air-conditioner/chiller with variable cooling capacity
10= “perturbed” air-conditioner/chiller
Advanced control
11= EPR back pressure
12= hot gas bypass by pressure
13= hot gas bypass by temperature
14= transcritical CO2 tgas cooler
15= analogue positioner (4 to 20 mA)
16= analogue positioner (0 to 10 V)
17= air-conditioner/chiller or cabinet/cold room with
adaptive control
18= air-conditioner/chiller with digital scroll compressor
19= AC/chiller with BLDC scroll compressor(*)
20= superheat control with 2 temperature probes
21= I/O expansion for pCO
22= Programmable SH control
23= Programmable special control
24= Programmable positioner
25= Evaporator liquid level control with CAREL sensor
26= Condenser liquid level control with CAREL sensor
Pressure/refrigerant level probe S1
Setting the type of pressure probe S1 defines the range of measurement
and the alarm limits based on the manufacturer’s data for each model,
usually indicated on the rating plate on the probe.
Select “CAREL liquid level” and connect the CAREL float level sensor to
manage the following functions:
- evaporator liquid level control with CAREL sensor;
- condenser liquid level control with CAREL sensor.
See the chapter on “Control”
Parameter/description
CONFIGURATION
Sensor S1
Ratiometric (OUT=0 to 5V)
1= -1 to 4.2 barg
2=-0.4 to 9.3 barg
3= -1 to 9.3 barg
4= 0 to 17.3 barg
5= 0.85 to 34.2 barg
6= 0 to 34.5 barg
7= 0 to 45 barg
21= -1 to 12.8 barg
22= 0 to 20.7 barg
23= 1.86 to 43.0 barg
24 = CAREL liquid level
Def.
Ratiom.:
Electronic (OUT=4 to 20mA)
-1 to 9.3 barg
8= -0.5 to 7 barg
9= 0 to 10 barg
10= 0 to 18,2 barg
11= 0 to 25 barg
12= 0 to 30 barg
13= 0 to 44.8 barg
14= remote, -0.5 to 7 barg
15= remote, 0 to 10 barg
16= remote, 0 to 18,2 barg
17= remote, 0 to 25 barg
18= remote, 0 to 30 barg
19= remote, 0 to 44.8 barg
20= external signal (4 to 20 mA)
multiplexed
cabinet/cold
room
Tab. 4.h
(*) CAREL valve drivers only
The superheat set point and all the parameters corresponding to PID
control, the operation of the protectors and the meaning and use of
probes S1 and/or S2 will be automatically set to the values recommended
by CAREL based on the selected application.
During this initial configuration phase, only superheat control mode
from 1 to 10 can be set, which differ based on the application (chiller,
refrigerated cabinet, etc.).
In the event of errors in the initial configuration, these parameters can
later be accessed and modified inside the service or manufacturer menu.
If the driver default parameters are restored (RESET procedure, see the
chapter on Installation), when next started the display will again show
the guided commissioning procedure.
25 = 0...60,0 barg
26 = 0...90,0 barg
27= external signal (0 to 5 V)(*)
Tab. 4.g
(*) for programmable positioner. See chapter “Control”.
Important: in case two pressure probes are installed S1 and S3,
they must be of the same type. It is not allowed to use a ratiometric probe
and an electronic one.
Note: in the case of multiplexed systems where the same pressure
probe is shared between multiple drivers, choose the normal option for
the first driver and the “remote” option for the remaining drivers. The same
pressure transducer can be shared between a maximum of 5 drivers.
Example: to use the same pressure probe, -0.5 to 7 bars, for 3 drivers
For the first driver, select: -0.5 to 7 barg
For the second and third driver select: remote -0.5 to 7 barg.
See paragraph 2.6
Note:
• the range of measurement by default is always in bar gauge (barg).In
the manufacturer menu, the parameters corresponding to the range
of measurement and the alarms can be customised if the probe used
is not in the standard list. If modifying the range of measurement, the
driver will detect the modification and indicate the type of probe S1
as “Customised”.
• The software on the driver takes into consideration the unit of measure.
If a range of measurement is selected and then the unit of measure is
changed (from bars to psi), the driver automatically updates in limits
of the range of measurement and the alarm limits.BY default, the main
control probe S2 is set as “CAREL NTC”. Other types of probes can be
selected in the service menu.
• Unlike the pressure probes, the temperature probes do not have any
modifiable parameters relating to the range of measurement, and
consequently only the models indicated in the list can be used (see
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
Def.
18
ENG
4.4 Auxiliary refrigerant
In the event of cascade systems comprising a main circuit and a secondary
circuit, the auxiliary refrigerant is the refrigerant in the secondary circuit.
See the paragraphs “Auxiliary control” and “Reverse high condensing
temperature protection (HiTcond) on S3”. The default value 0 sets the
same refrigerant as in the main circuit.
Parameter/description
Configuration
Def. Min Max UOM
Auxiliary refrigerant
0
-1=custom; 0 = same as main circuit;
1=R22 ; 2=R134a; 3=R404A; 4=R407C;
5=R410A; 6=R507A; 7=R290; 8=R600;
9=R600a; 10=R717; 11=R744; 12=R728;
13=R1270; 14=R417A; 15=R422D;
16=R413A; 17=R422A; 18=R423A;
19=R407A; 20=R427A; 21=R245FA;
22=R407F; 23=R32; 24=HTR01 ; 25=HTR02;
26= R3; 1=R22 ; 2=R134a; 3=R404A;
4=R407C; 5=R410A; 6=R507A; 7=R290;
8=R600; 9=R600a; 10=R717; 11=R744;
12=R728; 13=R1270; 14=R417A; 15=R422D;
16=R413A; 17=R422A; 18=R423A; 19=R407A;
20=R427A; 21=R245FA; 22=R407F; 23=R32;
24=HTR01; 25=HTR02; 26= R3; 27 = R1234yf;
28 = R1234ze; 29 = R455A; 30 = R170;
31 = R442A; 32 = R447A; 33 = R448A;
34 = R449A; 35 = R450A; 36 = R452A;
37 = R508B; 38 = R452B; 39 = R513A;
40 = R454B; 41 = R458A
Tab. 4.i
Note:
• if main refrigerant= custom and secondary refrigerant = custom, the
secondary refrigerant is the same as the main refrigerant, defined by
parameters dew a...f high/low and bubble a...f high/low;
• if main refrigerant is selected between 1 and 26 and secondary
refrigerant= custom, the secondary refrigerant parameters will be
those pertaining to the custom refrigerant: “Dew a...f high/low” and
“Bubble a...f high/low”.
4.5 Checks after commissioning
After commissioning:
• check that the valve completes a full closing cycle to perform
alignment;
• set, if necessary, in Service or Manufacturer programming mode, the
superheat set point (otherwise keep the value recommended by
CAREL based on the application) and the protection thresholds (LOP,
MOP, etc.). See the chapter on Protectors.
4.6 Other functions
By entering Service programming mode, other types of main control
can be selected (transcritical CO2, hot gas bypass, etc.), as well as socalled advanced control functions, which do not involve the superheat,
activating auxiliary controls that use probes S3 and/or S4 and setting the
suitable values for the control set point and the LowSH, LOP and MOP
protection thresholds (see the chapter on “Protectors”), which depend on
the specific characteristics of the unit controlled.
By entering Manufacturer programming mode, finally, the operation of
the driver can be completely customised, setting the function of each
parameter. If the parameters corresponding to PID control are modified,
the driver will detect the modification and indicate the main control as
“Customised”.
19
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
ENG
5. CONTROL
5.1 Main and auxiliary control
5.2 Superheat control
EVD evolution features two types of control: main and auxiliary.
Main control is always active, while auxiliary control can be activated by
parameter. Main control defines the operating mode of the driver. The
first 10 settings refer to superheat control, the others are so-called “special”
settings and are pressure or temperature settings or depend on a control
signal from an external controller. The last advanced functions (18, 19, 20)
also relate to superheat control. Programmable control exploits CAREL’s
technology and know-how in terms of control logic. Finally, it is possible
to contorl liquid level in applications with flooded evaporator/condenser.
The primary purpose of the electronic valve is ensure that the flow-rate
of refrigerant that flows through the nozzle corresponds to the flow-rate
required by the compressor. In this way, the evaporation process will take
place along the entire length of the evaporator and there will be no liquid
at the outlet and consequently in the branch that runs to the compressor.
As liquid is not compressible, it may cause damage to the compressor
and even breakage if the quantity is considerable and the situation lasts
some time.
Parameter/description
CONFIGURATION
Main control
Superheat control
1= multiplexed cabinet/cold room
2= cabinet/cold room with on-board compressor
3= “perturbed” cabinet/cold room
4= cabinet/cold room with subcritical CO2
5= R404A condenser for subcritical CO2
6= air-conditioner/chiller with plate heat exchanger
7= air-conditioner/chiller with tube bundle heat exchanger
8= air-conditioner/chiller with finned coil heat exchanger
9= air-conditioner/chiller with variable cooling capacity
10= “perturbed” air-conditioner/chiller
Advanced control
11= EPR back pressure
12= hot gas bypass by pressure
13= hot gas bypass by temperature
14= gas cooler CO2 transcritical
15= analogue positioner (4 to 20 mA)
16= analogue positioner (0 to 10 V)
Superheat control
17= air-conditioner/chiller or cabinet/ cold room with adaptive
control
18= air-conditioner/chiller with digital scroll compressor
19= AC/chiller with BLDC scroll compressor(*)
20= superheat control with 2 temperature probes
Advanced control
21= I/O expansion for pCO
22= Programmable SH control
23= Programmable special control
24= Programmable positioner
25= Evaporator liquid level control with CAREL sensor
26= Condenser liquid level control with CAREL sensor
Superheat control
Def.
The parameter that the control of the electronic valve is based on is
the superheat temperature, which effectively tells whether or not there
is liquid at the end of the evaporator. The superheat temperature is
calculated as the difference between: superheated gas temperature
(measured by a temperature probe located at the end of the evaporator)
and the saturated evaporation temperature (calculated based on the
reading of a pressure transducer located at the end of the evaporator and
using the Tsat(P) conversion curve for each refrigerant).
multiplexed
cabinet/
cold room
Superheat = Superheated gas temperature (*) – Saturated evaporation
temperature
(*) suction
If the superheat temperature is high it means that the evaporation process
is completed well before the end of the evaporator, and therefore flowrate of refrigerant through the valve is insufficient. This causes a reduction
in cooling efficiency due to the failure to exploit part of the evaporator.
The valve must therefore be opened further. Vice-versa, if the superheat
temperature is low it means that the evaporation process has not
concluded at the end of the evaporator and a certain quantity of liquid
will still be present at the inlet to the compressor. The valve must therefore
be closed further. The operating range of the superheat temperature is
limited at the lower end: if the flow-rate through the valve is excessive the
superheat measured will be near 0 K. This indicates the presence of liquid,
even if the percentage of this relative to the gas cannot be quantified. There
is therefore un undetermined risk to the compressor that must be avoided.
Moreover, a high superheat temperature as mentioned corresponds to
an insufficient flow-rate of refrigerant. The superheat temperature must
therefore always be greater than 0 K and have a minimum stable value
allowed by the valve-unit system. A low superheat temperature in fact
corresponds to a situation of probable instability due to the turbulent
evaporation process approaching the measurement point of the probes.
The expansion valve must therefore be controlled with extreme precision
and a reaction capacity around the superheat set point, which will almost
always vary from 3 to 14 K. Set point values outside of this range are quite
infrequent and relate to special applications.
Tab. 5.a
(*) only for CAREL valve drivers
Note:
• R404A condensers with subcritical CO2 refer to superheat control for valves
installed in cascading systems where the flow of R404A (or other refrigerant)
in an exchanger acting as the CO2 condenser needs to be controlled;
• perturbated cabinet/cold room or air-conditioner/chiller refer to units
that momentarily or permanently operate with swinging condensing
or evaporation pressure.
CONFIGURATION
Auxiliary control
1=Disabled
2=High condensing temperature protection on S3 probe
3=Modulating thermostat on S4 probe
4=Backup probes on S3 & S4
5=Reserved
6=Reserved
7=Reserved
8=Subcooling measurement
9=Reverse high condensing temp. protection on S3
Def.
L
Disabled
F
CP
S
M
Tab. 5.b
E
Important: the “High condensing temperature protection” and
“Modulating thermostat” auxiliary settings can only be enabled if the
main control is also superheat control with settings 1 to 10 and 17, 18. On
the other hand, the “Backup probes on S3 and S4” auxiliary control can be
activated, once the corresponding probes have been connected, only for
settings from 1 to 18.
V
EEV
P
Fig. 5.a
The following paragraphs explain all the types of control that can be set
on EVD evolution.
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
EVD
evolution
S1
S2
Auxiliary control features the following settings:
Parameter/description
C
20
T
ENG
Protector control parameters
Key:
CP
C
L
F
S
compressor
condenser
liquid receiver
dewatering filter
liquid indicator
EEV electronic expansion valve
V
solenoid valve
E
evaporator
P
pressure probe (transducer)
T
temperature probe
See the chapter on “Protectors”. Note that the protection thresholds are
set by the installer/manufacturer, while the times are automatically set
based on the PID control values suggested by CAREL for each application.
Parameter/description
CONTROL
LowSH protection threshold
For the wiring, see paragraph “General connection diagram”.
Note: superheat control in a refrigerant circuit with BLDC
compressor requires two probes for superheat control and two probes
downstream of the compressor for discharge superheat and discharge
temperature control. See par. 5.5.
Superheat control, as for any other mode that can be selected with the
“main control” parameter, is performed using PID control, which in its
simplest form is defined by the law:
UOM
5
-40 (-72)
superh. K(°F)
set point.
800
s
LowSH protection integration
time
LOP protection threshold
15
0
-50
-60 (-76)
LOP protection integration time
MOP protection threshold
0
50
0
LOP threshold
0
800
-60 (-76)
0
200 (392) °C (°F)
800
s
MOP
°C(°F)
threshold
800
s
200 (392) °C(°F)
s
5.3 Adaptive control and autotuning
i
Note: from the software revision following the 6.6-6.7, functions
“Adaptive control” and “Autotuning” are no longer present. Then
the setting:
Main control= air-conditioner/chiller or cabinet/ cold room with adaptive
control, is equivalent to:
Main control = multiplexed cabinet/cold room.
Key:
Integration time
Derivative time
Note that regulation is calculated as the sum of three separate contributions:
proportional, integral and derivative.
EVD evolution features two functions used to automatically optimise the
PID parameters for superheat control, useful in applications where there
are frequent variations in thermal load:
1. automatic adaptive control: the function continuously evaluates the
effectiveness of superheat control and activates one or more
optimisation procedures accordingly;
2. manual autotuning: this is activated by the user and involves just one
optimisation procedure.
Both procedures give new values to the PID superheat control and
protection function parameters:
- PID: proportional gain;
- PID: integration time;
- PID: derivative time;
- LowSH: low superheat integration time;
- LOP: low evaporation temperature integration time;
- MOP: high evaporation temperature integration time;
- HiTcond: high condensing temperature integration time.
Given the highly variable dynamics of superheat control on different units,
applications and valves, the theories on stability that adaptive control
and autotuning are based on are not always definitive. As a consequence,
the following procedure is suggested, in which each successive step is
performed if the previous has not given a positive outcome:
1) use the parameters recommended by CAREL to control the different
units based on the values available for the “Main control” parameter;
2) use any parameters tested and calibrated manually based on laboratory
or field experiences with the unit in question;
3) enable automatic adaptive control;
4) activate one or more manual autotuning procedures with the unit in
stable operating conditions if adaptive control generates the “Adaptive
control ineffective” alarm.
• the proportional action opens or closes the valve proportionally to
the variation in the superheat temperature. Thus the greater the K
(proportional gain) the higher the response speed of the valve. The
proportional action does not consider the superheat set point, but
rather only reacts to variations. Therefore if the superheat value does
not vary significantly, the valve will essentially remain stationary and
the set point cannot be reached;
• the integral action is linked to time and moves the valve in proportion
to the deviation of the superheat value from the set point. The greater
the deviations, the more intense the integral action; in addition, the
lower the value of T (integration time), the more intense the action
will be. The integration time, in summary, represents the intensity of
the reaction of the valve, especially when the superheat value is not
near the set point;
• the derivative action is linked to the speed of variation of the superheat
value, that is, the gradient at which the superheat changes from instant
to instant. It tends to react to any sudden variations, bringing forward
the corrective action, and its intensity depends on the value of the
time Td (derivative time).
Parameter/description
CONTROL
Superheat set point
PID proport. gain
PID integration time
PID derivative time
Max.
Tab. 5.d
1
de(t)
u(t)= K e(t) +T ∫e(t)dt + Td dt
Ti
Td
Min.
MOP protection integration time 20
ADVANCED
High Tcond threshold
80
High Tcond integration time
20
PID parameters
u(t) Valve position
e(t) Error
K
Proportional gain
Def.
Def.
Min.
Max.
UOM
11
15
150
5
LowSH: t.hold
0
0
0
180 (320) K (°F)
800
1000
s
800
s
Tab. 5.c
See the “EEV system guide” +030220810 for further information on
calibrating PID control.
Note: when selecting the type of main control (both superheat
control and special modes), the PID control values suggested by CAREL
will be automatically set for each application.
Adaptive control
After having completed the commissioning procedure, to activate
adaptive control, set the parameter:
“Main control”= air-conditioner/chiller or showcase/cold room with
adaptive control.
Parameter/description
Def.
CONFIGURATION
Main control
...
air-conditioner/chiller or cabinet/cold
room with adaptive control
21
multiplexed cabinet/cold room
Tab. 5.e
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
ENG
The activation status of the tuning procedure will be shown on the
standard display by the letter “T”.
ON
Surriscaldam.
4.9 K
Apertura
valvola
44 %
If the procedure ends successfully, the resulting control parameters will
be automatically saved.
• both the tuning procedure and adaptive control can only be enabled for
superheat control, they cannot be used for the advanced control functions.
For CAREL internal use only, some tuning procedure control parameters
can be shown on the display, supervisor, pCO and VPM; these must not
be modified by non-expert users. These are:
- Tuning method
- Adaptive control status
- Last tuning result
T
-- Rele
Tuning method is visible as a parameter in the Special category, the two
other parameters are visible in display mode. See paragraph 3.3.
With adaptive control enabled, the controller constantly evaluates
whether control is sufficiently stable and reactive; otherwise the
procedure for optimising the PID parameters is activated. The activation
status of the optimisation function is indicated on the standard display by
the message “TUN” at the top right.
Parameter/Description
ADVANCED
Tuning method
Note:
1
Tab. 5.f
Tab. 5.g
L
EVD
evolution
CP
S1
S2
TUN
S
Apertura
valvola
44 %
-
-
F
4.9 K
255
C
The activation status of the procedure is indicated on the standard
display by the message “TUN” at the top right.
Surriscaldam.
0
Parameter/Description
Def.
CONFIGURATION
Main control
multiplexed cabinet/
...
cold room
air-conditioner/chiller with Digital Scroll compressor
Tab. 5.h
EVD evolution also features an automatic tuning function (Autotuning)
for the superheat and protector control parameters, which can be started
by setting the parameter “Force manual tuning” = 1.
0
0
Digital Scroll compressors allow wide modulation of cooling capacity
by using a solenoid valve to active a patented refrigerant bypass
mechanism. This operation nonetheless causes swings in the pressure
of the unit, which may be amplified by normal control of the expansion
valve, leading to malfunctions. Dedicated control ensures greater stability
and efficiency of the entire unit by controlling the valve and limiting
swings based on the instant compressor modulation status. To be able
to use this mode, the pLAN version driver must be connected to a Carel
pCO series controller running a special application to manage units with
Digital scroll compressors.
Autotuning
0
UoM
Important: this type of control is incompatible with adaptive
control and autotuning.
is not guaranteed, however the safety of the unit is ensured through
activation of the protectors. If these are activated, the procedure is
interrupted;
• if all the attempts performed over 12 hours are unsuccessful, the
“adaptive control ineffective” alarm will be signalled and adaptive
control will be disabled, resetting the default values of the PID and
protection function parameters;
• to deactivate the “adaptive control ineffective” alarm set the value of
the “main control” parameter to one of the first 10 options. If required,
adaptive control can be immediately re-enabled using the same
parameter. If the procedure ends successfully, the resulting control
parameters will be automatically saved.
Min. Max. UoM
Max.
5.4 ControlwithEmersonClimateDigitalScroll™
compressor
• during the optimisation phase maintenance of the superheat set point
Def.
Min.
Note: the “Tuning method” parameter is for use by qualified CAREL
technical personnel only and must not be modified.
The PID parameter optimisation phase involves several operations on
the valve and readings of the control variables so as to calculate and
validate the PID parameters. These procedures are repeated to fine-tune
superheat control as much as possible, over a maximum of 12 hours.
Parameter/Description
ADVANCED
Force manual tuning 0 = no; 1= yes
Def.
-- Rele
V M
E
EV
P
The optimisation procedure can only be performed if the driver is
in control status, and lasts from 10 to 40 minutes, performing specific
movements of the valve and measurements of the control variables.
Note:
• during the function, maintenance of the superheat set point is not
guaranteed, however the safety of the unit is ensured through activation
of the protectors. If these are activated, the procedure is interrupted;
• if, due to external disturbance or in the case of particularly
unstable systems, the procedure cannot suitably optimise the
parameters, the controller will continue using the parameters
saved in the memory before the procedure was started.
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
Fig. 5.b
Key:
CP
C
L
F
S
T
Compressor
Condenser
Liquid receiver
Dewatering filter
Liquid gauge
V
T
EV
E
P
Solenoid valve
Temperature probe
Electronic valve
Evaporator
Pressure probe
For information on the wiring see paragraph “General connection diagram”.
22
ENG
5.5 BLDC Control with compressor
The pCO controller defines the current set point according to the point of
operation within the envelope:
• superheat setpoint;
• discharge superheat setpoint;
• discharge temperature setpoint.
Important: this type of control is incompatible with adaptive
control and autotuning.
To be able to use this control function, only available for CAREL valve
drivers, the driver must be connected to a CAREL pCO programmable
controller running an application able to manage a unit with BLDC scroll
compressor. In addition, the compressor must be controlled by the
CAREL Power+ “speed drive” (with inverter), specially designed to manage
the speed profile required by the compressor operating specifications.
Two probes are needed for superheat control (PA, TA) plus two probes
located downstream of the compressor (PB, TB) for discharge superheat
and discharge temperature (TB) control.
Parameter/Description
CONFIGURATION
Main control
…
AC/chiller with BLDC compressor
PB
Discharge superheat setpoint
Discharge temperature setpoint
35
105
LowSH: 180 (324) K (°F)
threshold
-40 (-72) 180 (324) K (°F)
-60 (-76) 200 (392) °C (°F)
Parameter/Description
CONFIGURATION
Main control
…
superheat regulation with 2 temperature probes
POWER +
speed drive
S1
S2
S3
S4
11
The functional diagram is shown below. This type of control must be used
with care, due to the lower precision of the temperature probe compared
to the probe that measures the saturated evaporation pressure.
TB
0V +
-
1
3
2
CP
Def.
multiplexed showcase/cold room
Tab. 5.k
C
shield
S
UOM
5.6 Superheat regulation with 2 temperature
probes
C
GND Tx/Rx
Max.
Note:
Tab. 5.i
F
Min.
• this control function is only available CAREL valve drivers.
• no set point needs to be configured by the user.
multiplexed showcase/cold
room
EVD
evolution
Def.
Tab. 5.j
Def.
L
Parameter/Description
ADVANCED
Superheat setpoint
PA TA
F
EVD
evolution
GND
S2
EV
L
Modbus®
RS485
E
CP
S4
V M
S
pCO
shield
Fig. 5.c
Key:
CP
C
L
F
TA, TB
Compressor
Condenser
Liquid receiver
Dewatering filter
Temperature probes
V
S
EV
E
PA, PB
V M
Solenoid valve
Liquid gauge
Electronic valve
Evaporator
Pressure probes
EV
T
E
T
For information on the wiring see paragraph “General connection
diagram”.
To optimise performance of the refrigerant circuit, compressor operation
must always be inside a specific area, called the envelope, defined by the
compressor manufacturer.
Fig. 5.e
Key:
CP
C
L
F
T
Temperatura di condensazione (C°)
Condensing temperature (C°)
Inviluppo ⁄ Envelope
Compressor
Condenser
Liquid receiver
Dewatering filter
Temperature probe
V
S
EV
E
Solenoid valve
Liquid gauge
Electronic valve
Evaporator
Parameter/Description
ADVANCED
Superheat setpoint
Def.
Min.
Max.
UOM
11
PID: proportional gain
PID: integral time
PID: derivative time
15
150
5
LowSH: 180 (324) K (°F)
threshold
0
800
0
1000
s
0
800
s
Tab. 5.l
Temperatura di evaporazione (C°)
Evaporation temperature (C°)
Fig. 5.d
23
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
ENG
5.7 Advanced regulation
Hot gas bypass by pressure
This control function can be used to control cooling capacity. If there
is no request from circuit B, the compressor suction pressure decreases
and the bypass valve opens to let a greater quantity of hot gas flow and
decrease the capacity of the circuit.
EPR back pressure
This type of control can be used in many applications in which a constant
pressure is required in the refrigerant circuit. For example, a refrigeration
system may include different showcases that operate at different
temperatures (showcases for frozen foods, meat or dairy). The different
temperatures of the circuits are achieved using pressure regulators
installed in series with each circuit. The special EPR function (Evaporator
Pressure Regulator) is used to set a pressure set point and the PID control
parameters required to achieve this.
C
L
EV
F
M
T
V1
V2
S1
S
EVD
evolution
CP
EVD
evolution
P
S1
E
P
EV
A
M
T
V1
V2
M
T
V1
V2
E
EVD
evolution
M
T
V1
V2
EV
Solenoid valve
E
Thermostatic expasnion valve EV
Fig. 5.g
Key:
CP
C
L
F
S
Evaporator
Electronic valve
For the wiring, see paragraph “General connection diagram”.
Def.
Min.
Max.
3.5
15
150
5
-20 (-290) 200 (2900) barg (psig)
0
800
0
1000
s
0
800
s
Compressor
Condenser
Liquid receiver
Dewatering filter
Liquid indicator
V1
V2
EV
E
Solenoid valve
Thermostatic expasnion valve
Electronic valve
Evaporator
For the wiring, see paragraph “General connection diagram”.
This involves PID control without any protectors (LowSH, LOP, MOP,
High Tcond, see the chapter on Protectors), without any valve unblock
procedure and without auxiliary control. Control is performed on the
pressure probe value read by input S1, compared to the set point: “EPR
pressure set point”. Control is direct, as the pressure increases, the valve
opens and vice-versa.
Parameter/description
CONTROL
EPR pressure set point
PID proport. gain
PID integration time
PID derivative time
E
S1
B
P
Fig. 5.f
Key:
V1
V2
E
This involves PID control without any protectors (LowSH, LOP, MOP,
High Tcond, see the chapter on Protectors), without any valve unblock
procedure and without auxiliary control. Control is performed on the
hot gas bypass pressure probe value read by input S1, compared to the
set point: “Hot gas bypass pressure set point”.Control is reverse, as the
pressure increases, the valve closes and vice-versa.
UOM
Tab. 5.m
Parameter/description
CONTROL
Hot gas bypass pressure set point
Def. Min.
Max.
UOM
3
PID proport. gain
PID integration time
PID derivative time
15
150
5
200
(2900)
800
1000
800
barg
(psig)
s
s
-20
(290)
0
0
0
Tab. 5.n
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
24
ENG
Hot gas bypass by temperature
Key:
CP
This control function can be used to control cooling capacity. On a
refrigerated cabinet, if the ambient temperature probe measures an
increase in the temperature, the cooling capacity must also increase, and
so the valve must close.
C
V1
V3
S
C
L
Compressor
EV_1
EV_2
Condenser
T
Solenoid valve
E
Non-return valve
V2
Heat exchanger (reheating)
Electronic valves connected in complementary mode
Temperature probe
Evaporator
Thermostatic expansion valve
Transcritical CO2 gas cooler
EV
F
EVD
evolution
CP
S2
S
This solution for the use of CO2 in refrigerating systems with a transcritical
cycle involves using a gas cooler, that is a refrigerant/air heat exchanger
resistant to high pressures, in place of the condenser. In transcritical
operating conditions, for a certain gas cooler outlet temperature, there is
pressure that optimises the efficiency of the system:
V1
V2
E
Fig. 5.h
Key:
CP
C
L
F
S
Set= pressure set point in a gas cooler with transcritical CO2
T= gas cooler outlet temperature
Default value: A= 3.3, B= -22.7.
In the simplified diagram shown below, the simplest solution in
conceptual terms is shown. The complications in the systems arise due to
the high pressure and the need to optimise efficiency.
T
Compressor
Condenser
Liquid receiver
Dewatering filter
Liquid indicator
V1
V2
EV
E
Solenoid valve
Thermostatic expansion valve
Electronic valve
Evaporator
EVD
evolution
For the wiring, see paragraph “General connection diagram”.
EV
This involves PID control without any protectors (LowSH, LOP, MOP,
High Tcond, see the chapter on Protectors), without any valve unblock
procedure and without auxiliary control. Control is performed on the hot
gas bypass temperature probe value read by input S2, compared to the
set point: “Hot gas bypass temperature set point”.
Control is reverse, as the temperature increases, the valve closes.
Parameter/description
CONTROL
Hot gas bypass temp. set point
PID: proportional gain
PID integration time
PID derivative time
Def.
Min.
Max.
UOM
10
15
150
5
-60 (-76)
0
0
0
200 (392)
800
1000
800
°C (°F)
s
s
V2
V2
Fig. 5.j
This involves PID control without any protectors (LowSH, LOP, MOP,
High Tcond, see the chapter on Protectors), without any valve unblock
procedure and without auxiliary control. Control is performed on the gas
cooler pressure probe value read by input S1, with a set point depending
on the gas cooler temperature read by input S2; consequently there is
not a set point parameter, but rather a formula:
“CO2 gas cooler pressure set point”= Coefficient A * Tgas cooler (S2) +
Coefficient B. The set point calculated will be a variable that is visible in
display mode. Control is direct, as the pressure increases, the valve opens.
CP
S1
S2
Parameter/description
ADVANCED
CO2 regul. ‘A’ coefficient
CO2 regul. ‘B’ coefficient
CONTROL
PID proport. gain
PID integration time
PID derivative time
T
V1
V1
E
For the wiring, see paragraph “General connection diagram”.
EVD
evolution
T
T
CP Compressor
V2 Thermostatic expasnion valve
GC Gas cooler
EV Electronic valve
E
Evaporator
IHE Inside heat exchanger
V1 Solenoid valve
EV_2
M
GC
M
Key:
C
V3
T
IHE
Another application that exploits this control function uses the connection
of two EXV valves together to simulate the effect of a three-way valve,
called “reheating”. To control humidity, valve EV_1 is opened to let the
refrigerant flow into exchanger S. At the same time, the air that flows
through evaporator E is cooled and the excess humidity removed, yet the
temperature is below the set room temperature. It then flows through
exchanger S, which heats it back to the set point (reheating).
s
P
CP
Tab. 5.o
EV_1
S2
T
S1
M
E
Def.
Min.
Max.
UOM
3.3
-22.7
-100
-100
800
800
-
15
150
5
0
0
0
800
1000
800
s
s
Tab. 5.p
Fig. 5.i
25
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
ENG
Analogue positioner (4 to 20 mA)
I/O expander for pCO
The valve will be positioned linearly depending on the value of the “4 to
20 mA input for analogue valve positioning” read by input S1.
There is no PID control nor any protection (LowSH, LOP, MOP, High Tcond,
see the chapter on Protectors), no valve unblock procedure and no
auxiliary control.
The EVD Evolution driver is connected to the pCO programmable
controller via LAN, transferring the probe readings quickly and without
filtering. The driver operates as a simple actuator, and receives the
information needed to manage the valves from the pCO.
Parameter/Description
CONFIGURATION
Main control
…
I/O expander for pCO
EV
EVD
evolution
regulator
T
Def.
multiplexed showcase/cold
room
Tab. 5.q
S1
P
4-20 mA
A
100%
EV
EVD
evolution
0%
20
mA
S1
S2
S3
S4
4
T
EV Electronic valve
A
Valve opening
P
For the wiring, see paragraph “General connection diagram”.
Forced closing will only occur when digital input DI1 opens, thus
switching between control status and standby. The pre-positioning and
repositioning procedures are not performed. Manual positioning can be
enabled when control is active or in standby.
T
shield
T
EV
The valve will be positioned linearly depending on the value of the “0 to
10 V input for analogue valve positioning” read by input S1.
There is no PID control nor any protection (LowSH, LOP, MOP, High Tcond),
no valve unblock procedure and no auxiliary control, with corresponding
forced closing of the valve and changeover to standby status.
T
Main control
…
22= Programmable SH control ¦
23 = Programmable special control¦
24 = Programmable positioner
…
SPECIAL
Programmable control configuration
Programmable control input
Programmable SH control options
Programmable control set point
S2
0-10 Vdc
100%
0%
10
Vdc
Fig. 5.l
Key:
Electronic valve
A
P
Pressure probe
The following types of programmable control are available:
• Programmable superheat control (SH);
• Programmable special control;
• Programmable positioner.
Parameter/description
Def
Min
Max
CONFIGURATION
P
0
Temperature probe
Electronic valve
5.8 Programmable control
EV
A
Fig. 5.m
Key:
regulator
pCO
P
Analogue positioner (0 to 10 Vdc)
EVD
evolution
GND
Key:
EV
GND Tx/Rx
Fig. 5.k
Valve opening
U.M.
Multiplexed cabinet
/ cold room
-
0
0
0
0
32767 32767 32767 800
(11603)
0
0
0
-800
(-11603)
-
Tab. 5.r
The table shows the programmable control functions and the related
parameter settings.
For the wiring, see paragraph “General connection diagram”.
Function
Important: the pre-positioning and repositioning procedures
are not performed. Manual positioning can be enabled when control is
active or in standby.
Direct/reverse setting
Parameter to be set
Programmable control
configuration
Type of physical value controlled
Programmable control
configuration
Input processing to determine measurement Programmable control
configuration
Correction to each individual input for inte- Programmable control input
gration in measurement calculation
Association between physical inputs and
Programmable control input
logical outputs
Note: the control error is the result of the difference between the
set point and the measurement:
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
26
ENG
setpoint
error
(*): Tdew() = function for calculating the saturated evaporation
temperature according to the type of gas.
PID
(**): Tbubble = function for calculating the condensing temperature.
Direct operation:
Reverse operation:
Pressure [MPa]
measure
error = measurement - set point
error = set point - measurement
Programmable control configuration
Each digit in the “Programmable control configuration” parameter has a
special meaning, depending on its position:
Units
NOTE
Select type of control action:
direct/reverse
Selection any auxiliary control
or protector used for superheat
control
Do not select
Controlled value
Select the type of controlled
physical value (temperature,
pressure…)
Measurement function Select the function for calculating the value controlled by the
PID (measurement)
Direct/reverse control – Tens of thousands
Value Description
0
PID in direct control
1
PID in reverse control
2,….9 -
C
A B
F
Enthalpy [kJ/kg]
POSITION
DESCRIPTION
Tens of thousands Control: direct/reverse
(DM)
Thousands (M)
Auxiliary control
Hundreds
Tens
E D
Fig. 5.n
Key:
TA
Saturated evaporation temperature = Tdew
TB
Superheated gas temperature = suction temperature
TB – TA Superheat
TD
Condensing temperature (TBUBBLE)
TE
Subcooled gas temperature
TD – TE Subcooling
Options/ programmable control set point
Tab. 5.a
Note:
- if Control = Programmable special control, the setting of the
“Programmable control options” parameter has no affect;
- if Control = “Programmable positioner”, the settings of the
“Programmable control options” and “Programmable control set
point” parameters have no affect.
AUX control - Thousands
Value Description
0
None
1
HITCond protection
2
Modulating thermostat
3
HiTcond protection in reverse
4,….9 -
The physical value measured is assigned to the individual probes S1 to
S4 by the “Programmable control options” parameter. The parameter has
16 bits and is divided into 4 digits, as described in “Programmable control
configuration”, corresponding to the 4 probes, S1, S2, S3, S4. The control
set point si sets to the “Programmable control set point” parameter.
Hundreds – DO NOT SELECT
Controlled value - Tens
Value Description
0
Temperature (°C/°F), absolute
1
Temperature (K/°F), relative
2
Pressure (bar/psi), absolute
3
Pressure (barg/psig), relative
4
Current (mA) for control
5
Voltage (V) for control
6
Voltage (V) for positioner
7
Current (mA) for positioner
8.9
-
POSITION
Thousands
Hundreds
Tens
Units
Value
0
1
2
3
4
5
6
7,8,9
Measurement function - Units
Value Description
0
f1(S1)+ f2(S2)+ f3(S3)+ f4(S4)
1,….9 -
Note: if several inputs are associated with the same logical
meaning, EVD Evolution considers the one associated with the input that
has the highest index.
Programmable control input
Examples
The function assigned to each input is defined by parameter “Programmable control input”. The parameter has 16 bits and is divided
into 4 digits, as described in “Programmable control configuration”,
corresponding to the 4 probes, S1, S2, S3, S4.
POSITION
Thousands
Hundreds
Tens
Units
Value
0
1
2
3
4
5
6
7,8,9
DESCRIPTION
Function of probe S1
Function of probe S2
Function of probe S3
Function of probe S4
Input function
None
Suction temperature
Evaporation pressure
Evaporation temperature
Condensing pressure
Condensing temperature
Temperature (modulating thermostat)
-
EXAMPLE 1
• Main control = 22 Programmable SH control;
• Programmable control configuration = 01010; Direct PID temperature
control; high condensing temperature protection (HITCond) enabled;
• Programmable control input = 0041 Measurement =S4-Tdew(S3)
• Programmable control options = 4021:
S1= condensing pressure,
S3=evaporation pressure,
S4=suction temperature.
• Programmable control set point = 8.0 (°C).
DESCRIPTION
Function of probe S1
Function of probe S2
Function of probe S3
Function of probe S4
Input function
0
+ Sn
- Sn
+ Tdew (Sn)(*)
- Tdew (Sn)
+ Tbub (Sn)(**)
- Tbub (Sn)
-
Examing each digit, it can be seen that this involves superheat control
performed by measuring the suction temperature with probe S4
and determining the evaporation temperature by converting the
pressure read by probe S3 to temperature. Moreover, high condensing
temperature protection (HITCond) is selected on probe S1. PID control is
direct, with a set point of 8°C.
27
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
ENG
EXAMPLE 2
• Main control = 23 Programmable special control;
• Programmable control configuration=00040, direct control current;
• Programmable control input = 1000 Measurement =S1
• Programmable control options = XXXX: no affect
• Programmable control set point = 16.0 (mA)
The action is reverse: if the liquid level measured by the float level sensor
is higher (lower) than the set point, the EEV valve closes (opens).
TO
COMPRESSOR
EVD
evolution
S1
S2
This involves PID control of refrigerant liquid level with flooded evaporator,
using the current at input S1 as the measurement and a set point of 16
mA, with direct PID control of the valve.
E
MAX = 100 %
Setpoint = 50 %
MIN = 0 %
EXAMPLE 3
• Main control = 23 Programmable special control;
• Programmable control configuration = 10050 reverse PID voltage
control;
• Programmable control input = 0100 Measurement =S2
• Programmable control options = XXXX: no affect
• Programmable control set point = 7.0 (V)
S
EEV
FLOODED
SHELL AND
TUBE EVAPORATOR
This involves control of refrigerant liquid level with flooded evaporator,
using the voltage value at input S2 as the measurement and a set point
of 7.0 V, with reverse PID control of the valve.
Key:
S
EEV
E
EXAMPLE 4
• Main control = 24 Programmable positioner;
• Programmable control configuration = 00070 current (mA) for
positioner;
FROM
CONDENSER
Fig. 5.o
Float level sensor
Electronic valve
Flooded evaporator
• Programmable control input = 00010 Measurement =S3;
• Programmable control options = XXXX: no affect;
• Programmable control set point = XXXX: no affect.
With the condenser, the action is direct: if the liquid level measured by
the float level sensor is lower (higher) than the set point, the EEV valve
closes (opens).
This involves a 4 to 20 mA analogue positioner (without PID): the valve
will be positioned linearly, depending on the “4 to 20 mA input value for
analogue valve positioning”, read by input S3.
For the wiring, see paragraph “General connection diagram”.
5.10 Auxiliary control
5.9 Control with refrigerant level sensor
Auxiliary control can be activated at the same time as main control, and
uses the probes connected to inputs S3 and/or S4.
In the flooded shell and tube evaporator and in the flooded condenser,
the refrigerant vaporises outside of the tubes, which are immersed in
the liquid refrigerant. The hot fluid flowing through the tubes is cooled,
transferring heat to the refrigerant surrounding the tubes, so that this
boils, with gas exiting from the top, which is taken in by the compressor.
Parameter/description
CONFIGURATION
Probe S1
…
24 = CAREL liquid level
…
Main control
…
25 = Evaporator liquid level
control with CAREL sensor
26 = Condenser liquid level
control with CAREL sensor
CONTROL
Liquid level set point
Def
Min Max UOM
Ratiometric:-1…9.3
barg
-
-
-
Multiplexed cabinet/ cold room
-
-
50
100
%
0
Parameter/description
Def.
CONFIGURATION
Auxiliary control:
Disabled
1=Disabled; 2=High condensing temperature protection on S3
probe; 3=Modulating thermostat on S4 probe; 4=Backup probes
on S3 & S4; 5, 6, 7 = Reserved; 8 = Subcooling measurement; 9 =
Reverse high condensing temperature protection on S3
Tab. 5.s
For the high condensing temperature protection (only available with
superheat control), an additional pressure probe is connected to S3 that
measures the condensing pressure.
For the modulating thermostat function (only available with superheat
control), an additional temperature probe is connected to S4 that
measures the temperature on used to perform temperature control (see
the corresponding paragraph).
The last option (available if “main control” = 1 to 18) requires the installation
of both probes S3 & S4, the first pressure and the second temperature.
Note: if only one backup probe is fitted, under the manufacture
parameters, the probe thresholds and alarm management can be set
separately.
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
28
ENG
HITCond protection (high condensing temperature)
Examples of operation:
The functional diagram is shown below.
S4
set point + diff
C
set point
t
3. offset too low (or function
disabled)
L
SV
P
EVD
evolution
OFF
t
CP
S1
S2
S3
F
ON
S4
S
set point + diff
set point
M
4. offset too high
E
V
EEV
ON
SV
T
OFF
t
Fig. 5.p
Compressor
Condenser
Liquid receiver
Dewatering filter
Liquid indicator
S4
EEV Electronic expansion valve
V
Solenoid valve
E
Evaporator
P
Pressure probe (transducer)
T
Temperature probe
set point + diff
set point
t
5. offset correct
For the wiring, see paragraph “General connection diagram”.
ON
SV
OFF
As already mentioned, the HITCond protection can only be enabled if the
controller measures the condensing pressure/temperature, and responds
moderately by closing the valve in the event where the condensing
temperature reaches excessive values, to prevent the compressor from
shutting down due to high pressure. The condensing pressure probe
must be connected to input S3.
Fig. 5.q
Key:
diff= differential
SV= solenoid valve (showcase temperature control)
S4= temperature
Modulating thermostat
This function is used, by connecting a temperature probe to input
S4, to modulate the opening of the electronic valve so as to limit the
lowering of the temperature read and consequently reach the control
set point. This is useful in applications such as the multiplexed cabinets
to avoid the typical swings in air temperature due to the ON/OFF control
(thermostatic) of the solenoid valve. A temperature probe must be
connected to input S4, located in a similar position to the one used for
the traditional temperature control of the cabinet. In practice, the close
the controlled temperature gets to the set point, the more the control
function decreases the cooling capacity of the evaporator by closing the
expansion valve. By correctly setting the related parameters (see below),
a very stable cabinet temperature can be achieved around the set point,
without ever closing the solenoid valve. The function is defined by three
parameters: set point, differential and offset.
Parameter/description
ADVANCED
Modul. thermost setpoint
Def.
Min.
Max.
UOM
0
0.1
Modul. thermost SHset offset (0= function disabled)
0
200
(392)
100
(180)
100
(180)
°C (°F)
Modul. thermost differential
-60
(-76)
0.1
(0.2)
0 (0)
t
C
L
EVD
evolution
S1
S2
F
CP
S4
Key:
CP
C
L
F
S
P
t
S
M
V
°C (°F)
T
EEV
E
P
T
Fig. 5.r
K (°R)
Key:
CP
C
L
F
S
Tab. 5.t
The first two should have values similar to those set on the controller for
the cabinet or utility whose temperature is being modulated.
The offset, on the other hand, defines the intensity in closing the valve
as the temperature decreases: the greater the offset, the more the valve
will be modulated. The function is only active in a temperature band
between the set point and the set point plus the differential.
Compressor
Condenser
Liquid receiver
Dewatering filter
Liquid indicator
EEV Electronic expansion valve
V
Solenoid valve
E
Evaporator
P
Pressure probe (transducer)
T
Temperature probe
For the wiring, see paragraph “General connection diagram”.
Important: the “Modulating thermostat” function should not be
used on stand-alone refrigeration units, but only in centralised systems.
In fact, in the former case closing the valve would cause a lowering of the
pressure and consequently shut down the compressor.
29
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ENG
Backup probes on S3 & S4
The subcooling measurement uses the difference between the
condensing temperature taken from the relative pressure reading and
the temperature of the liquid refrigerant exiting the condenser. This
measurement indicates the refrigerant charge in the circuit.
A value near 0 K indicates possible insufficient refrigerant, which may
cause a decline in circuit cooling efficiency, a reduction in mass flow
through the expansion valve and swings in superheat control. In addition,
it may indicate a refrigerant leak in circuits where the nominal subcooling
value is known.
A subcooling value that is too high, for example above 20 K, when not
required by the application may indicate excessive refrigerant charge in
the circuit, and can cause unusually high condensing pressure values
with a consequent decline in circuit cooling efficiency and possible
compressor shutdown due to the high pressure switch tripping.
Important: this type of control is compatible with the “main
control” parameter setting between 1 and 18.
In this case, pressure probe S3 and temperature probe S4 will be used
to replace probes S1 and S2 respectively in the event of faults on one or
both, so as to guarantee a high level of reliability of the controlled unit.
C
L
EVD
evolution
Reverse high condensing temperature protection
(HiTcond) on S3
CP
S1
S2
S3
S4
F
S
The aim of reverse HiTcond protection is to limit the condensing pressure
in the refrigerant circuit by opening the valve rather than closing it. This
function is recommended, rather than the HiTcond protection function
described previously, in refrigerant circuits without a liquid receiver and
where the condenser is smaller than the evaporator (e.g. air-to-water
heat pumps). In this case, in fact, closing the valve would obstruct the
flow of refrigerant to the condenser that, lacking sufficient volume for
the refrigerant to accumulate, would cause an increase in condensing
pressure. This function is especially useful for condensers in CO2 cascade
systems. See the chapter on Protectors.
M
E
EEV
V
P
P
T
Fig. 5.s
Key:
CP
C
L
F
S
T
Compressor
Condenser
Liquid receiver
Dewatering filter
Liquid indicator
C
EEV Electronic expansion valve
V
Solenoid valve
E
Evaporator
P
Pressure probe (transducer)
T
Temperature probe
P
For the wiring, see paragraph “General connection diagram”.
F
CP
S1
S
This function measures subcooling using a pressure probe and a
temperature probe connected to inputs S3 and S4 respectively. The
reading can be sent to a controller connected in the serial network (e.g.
pCO).
S3
Subcooling measurement
S2
EVD
evolution
V M
C
E
EEV
TB
P
T
PB
L
Fig. 5.u
Key:
CP
F
EVD
evolution
S
S1 S2 S3 S4
CP
C
F
S
T
Compressor
Condenser
Filter-drier
Liquid gauge
Temperature probe
EEV
V
E
P
Electronic expansion valve
Solenoid valve
Evaporator
Pressure probe (transducer)
For the wiring, see paragraph “General connection diagram”
V M
E
EEV
PA TA
Fig. 5.t
Key:
CP
C
L
F
S
Compressor
Condenser
Liquid receiver
Filter-drier
Liquid gauge
EEV
V
E
PA, PB
TA, TB
Electronic expansion valve
Solenoid valve
Evaporator
Pressure probes
Temperature probes
For the wiring, see paragraph“General connection diagram”
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
30
ENG
6. FUNCTIONS
6.1 Power supply mode
Inputs S2, S4
The options are standard NTC probes, high temperature NTC, combined
temperature and pressure probes and 0 to 10 Vdc input. For S4 the 0
to 10 Vdc input is not available. When choosing the type of probe, the
minimum and maximum alarm values are automatically set. See the
chapter on “Alarms”. The auxiliary probe S4 is used in various applications
(e.g.: superheat control with BLDC compressor, I/O expansion for pCO,
subcooling measurement) or can be used as a backup probe for the main
probe S2.
EVD evolution can be powered at 24 Vac or 24 Vdc. In the event of direct
current power supply, after completing the commissioning procedure, to
start control set “Power supply mode” parameter=1.
Parameter/Description
ADVANCED
Power supply mode
0=24 Vac
1= 24 Vdc
Def.
Min.
Max.
UOM
0
0
1
-
CAREL code
NTC0**HP00
NTC0**WF00
NTC0**HF00
CAREL NTC-HT HT (50KΩ at 25°C) NTC0**HT00
Tab. 6.a
Important: with direct current power supply, in the event of power
failures emergency closing of the valve is not performed, even if the
EVD0000UC0 module is connected.
0 min
6.3 Network connection
Input S3
The auxiliary probe S3 is associated with the high condensing
temperature protection or can be used as a backup probe for the main
probe S1. If the probe being used is not included in the list, select any
0 to 5 V ratiometric or electronic 4 to 20 mA probe and then manually
modify the minimum and maximum measurement in the manufacturer
parameters corresponding to the probes.
Important: to set the pLAN address, follow the guidelines in chap.4.
To connect an RS485/Modbus® controller to the network, as well as the
network address parameter (see paragraph 4.2), using the “Network
settings” parameter.
Description
Def.
Bit stop
2 bit stop
2 bit stop
2 bit stop
1 bit stop
1 bit stop
1 bit stop
2 bit stop
2 bit stop
2 bit stop
1 bit stop
1 bit stop
1 bit stop
2 bit stop
2 bit stop
2 bit stop
1 bit stop
1 bit stop
1 bit stop
SPKP**T0
NTC*LT*
Parameter/description
Def.
CONFIGURATION
Probe S2:
CAREL NTC
1= CAREL NTC; 2= CAREL NTC-HT high T; 3= NTC built-in SPKP**T0;
4= 0-10 V external signal; 5= NTC – LT CAREL low temp.
Probe S4:
CAREL NTC
1= CAREL NTC; 2= CAREL NTC-HT high T; 3= NTC built-in
SPKP**T0; 4= -- ; 5= NTC – LT CAREL low temperature
Tab. 6.d
Def.
parity
none parity
none parity
none parity
none parity
none parity
none parity
even parity
even parity
even parity
even parity
even parity
even parity
odd parity
odd parity
odd parity
odd parity
odd parity
odd parity
NTC built-in
NTC low temperature
0T120°C
(150 °C per 3000 h)
-40T120°C
-80T60°C
Important: in case of NTC built-in probe, select also the parameter
relevant to the corresponding ratiometric pressure probe.
Battery charge delay to allow battery charging. In the presence of a
battery to close the valve, to avoid missing emergency closing in case
of repeated and close blackouts, a regulation start delay has been
introduced, configurable by the user depending on the backup system
used (ultracap or lead battery). This delay, if set to a value> 0, occurs every
time the driver is turned on to allow the battery to recharge.
Parameter
SPECIAL
Set configuration
0
1
2
4
5
6
16
17
18
20
21
22
24
25
26
28
29
30
Range
-50T105°C
Tab. 6.c
6.2 Battery charge delay
Parameter/description
ADVANCED
Battery charge delay
Type
CAREL NTC (10KΩ at 25°C)
Baud rate
4800 bps
9600 bps
19200 bps
4800 bps
9600 bps
19200 bps
4800 bps
9600 bps
19200 bps
4800 bps
9600 bps
19200 bps
4800 bps
9600 bps
19200 bps
4800 bps
9600 bps
19200 bps
Important:
• probes S1 and S3 must be the same type, therefore if S1 is a ratiometric
probe (pressure probe or CAREL liquid level probe), S3 must also be
ratiometric;
• probes S3 and S4 are shown as NOT USED if the “auxiliary control”
parameter is set as “disabled”. If “auxiliary control” has any other setting,
the manufacturer setting for the probe used will be shown, which can
be selected according to the type.
• Probe S1 = CAREL liquid level must be set with “Main control“=“Evaporator
liquid level control with CAREL sensor” or “Condenser liquid level control
with CAREL sensor”. Probe S3 = CAREL liquid level is set in the case of liquid
level control with programmable control.
x
Auxiliary control
High condensing temperature protection
Modulating thermostat
Backup probes
Subcooling measurement
Reverse high condensing temp. protection on S3
Tab. 6.b
Note: To use the Carel protocol you must use the default settings:
Parameter/description
Configuration
Probe S3:
0 = custom
Ratiometric (OUT=0 to 5 V)
1= -1 to 4.2 barg
2= 0.4 to 9.3 barg
3= -1 to 9.3 barg
4= 0 to 17.3 barg
5= 0.85 to 34.2 barg
6= 0 to 34.5 barg
7= 0 to 45 barg
• byte size: 8 bits;
• stop bits: 2;
• parity: none.
6.4 Inputs and outputs
Analogue inputs
The parameters in question concern the choice of the type pressure/
liquid probe S1 and S3 and the choice of the temperature probe S2 and
S4, as well as the possibility to calibrate the pressure and temperature
signals. As regards the choice of pressure/liquid probe S1 and S3 , see the
chapter on “Commissioning”.
31
Variable displayed
S3
S4
S3,S4
S3, S4
S3
Tab. 6.e
Def.
Electronic (OUT=4 to 20 mA)
8= -0.5 to 7 barg
9= 0 to 10 barg
10= 0 to 18,2 barg
11= 0 to 25 barg
12= 0 to 30 barg
13= 0 to 44.8 barg
14= remote, -0.5 to 7 barg
15= remote, 0 to 10 barg
16= remote, 0 to 18,2 barg
17= remote, 0 to 25 barg
Ratiom.:
-1 to 9.3 barg
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
ENG
21= -1 to 12.8 barg
22= 0 to 20.7 barg
23= 1.86 to 43.0 barg
24 =CAREL liquid level
25 = 0...60,0 barg
26 = 0...90,0 barg
27 = external signal 0...5 V
18= remote, 0 to 30 barg
19= remote, 0 to 44.8 barg
20= 4-20 mA external signal
( cannot be selected)
Valve regulation optimization after defrost: the selected digital input
tells the driver the current defrost status.
Defrost active = contact closed.
Access Manufacturer programming mode to set the start delay after
defrost.
Ratiom.:
-1 to 9.3 barg
Discharged battery alarm management: if the selected digital input is
connected to the battery charge module for EVD evolution, EVBAT00400,
the controller signals discharged or faulty batteries, so as to generate an
alarm message and warn the service technicians that maintenance is
required. See the connection diagram in chapter 2.
Tab. 6.f
(*) for programmable positioner. See chapter “Control”.
Valve forced open: when the digital input closes, the valve opens
completely (100%), unconditionally. When the contact opens again the
valve closes and moves to the position defined by the parameter “valve
opening at start-up” for the pre-position time. Control can then start.
Calibrating pressure probes S1, S3 and temperature
probes S2 and S4 (offset and gain parameters)
In case it is necessary to make a calibration:
• of the pressure probe, S1 and/or S3 it is possible to use the offeset
parameter, which represents a constant that is added to the signal
across the entire range of measurement, and can be expressed in
barg/psig. If the 4 to 20 mA signal coming from an external controller
on input S1 needs to be calibrated, both the offset and the gain
parameters can be used, the latter which modifies the gradient of the
line in the field from 4 to 20 mA.
• of the temperature probe, S2 and/or S4 it is possible to use the offset
parameter, which represents a constant that is added to the signal
across the entire range of measurement, and can be expressed in °C/°F.
If the 0 to 10 Vdc signal coming from an external controller on input
S2 needs to be calibrated, both the offset and the gain parameters can
be used, the latter which modifies the gradient of the line in the field
from 0 to 10 Vdc.
Regulation start/stop:
digital input closed: control active;
digital input open: driver in standby (see the paragraph “Control status”);
Important: this setting excludes activation/deactivation of control
via the network. See the following functions.
• Regulation backup: if there is a network connection and
communication fails, the driver checks the status of the digital input to
determine whether control is active or in standby;
• Regulation security: if there is a network connection, before control is
activated the driver must receive the control activation signal and the
selected digital input must be closed. If the digital input is open, the
driver always remains in standby.
Priority of digital inputs
In certain cases the setting of digital inputs 1 and 2 may be the same
or alternatively may be incompatible (e.g.: digital input 1 = regulation
backup, digital input 2 = regulation security). The problem thus arises to
determine which function the driver needs to perform.
B
B
Consequently, each type of function is assigned a priority, primary (PRIM)
or secondary (SEC), as shown in the table:
DI1/DI2 configuration
1=Disabled
2=Valve regulation optimization after defrost
3=Discharged battery alarm management
4=Valve forced open (at 100%)
5=Regulation start/stop
6=Regulation backup
7=Regulation security
A
A
mA
4
Key:
A= offset
20
Vdc
0
Fig. 6.a
10
B= gain
Parameter/description
PROBES
S1 calibration offset
Def. Min.
Max.
0
S1 calibration gain on 4-20 mA
S2 calibration offset
1
0
S2 calibration gain, 0 to 10 V
S3 calibration offset
S4 calibration offset
1
0
0
60 (870), barg (psig),
60
mA
20
20 (290), °C (°F), volt
20
20
60 (870) barg (psig)
20 (36) °C (°F)
-60 (-870),
-60
-20
-20 (-290),
-20
-20
-60 (-870)
-20 (-36)
UOM
There are four possible cases of digital input configurations with primary
or secondary functions.
Function set
DI1
PRIM
PRIM
SEC
SEC
DI2
PRIM
SEC
PRIM
SEC
Tab. 6.g
The functions of digital inputs 1 and 2 can be set by parameter, as shown
in the table below:
Parameter/description
Def. Min. Max. UOM
5/6 1
7
-
Relay output
10
0
60
The relay output can be configured as:
• alarm relay output. See the chapter on Alarms;
• solenoid valve control;
• electronic expansion valve status signal relay. The relay contact is only
open if the valve is closed (opening=0%). As soon as control starts
(opening >0%, with hysteresis), the relay contact is closed
• relay control signal: the relay is managed by a digital variable accessible
via serial (direct relay control signal).
min
Tab. 6.h
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
Function performed by digital input
PRIM
SEC
DI1
DI1
DI2
DI2
DI1
Regulation backup DI1
(supervisor variable)
Note that:
• if digital inputs 1 and 2 are set to perform a PRIM function, only the
function set for input 1 is performed;
• if the digital inputs 1 and 2 are set to perform a SEC function, only
the SEC function set for input 1 is performed; the driver will be set to
“Regulation backup” with the value of the digital input determined by
the “Regulation backup from supervisor” variable.
Digital inputs
CONFIGURATION
DI1 configuration
1= Disabled
2= Valve regulation optimization after defrost
3= Discharged battery alarm management
4= Valve forced open (at 100%)
5= Regulation start/stop
6= Regulation backup
7= Regulation security
CONTROL
Start delay after defrost
Type of function
SEC
SEC
SEC
SEC
PRIM
PRIM
PRIM
32
ENG
Standby
Parameter/description
Def.
CONFIGURATION
Relay configuration:
Alarm
1= Disabled; 2= alarm relay (opened in case of alarm); 3= Sole- relay
noid valve relay (open in standby); 4= valve + alarm relay (open
in standby and control alarms); 5= Reversed alarm relay (closed
in case of alarm); 6= Valve status relay (open if valve is closed); 7
= Direct control; 8 = Failed closing alarm relay (open with alarm);
9 = reverse failed closing alarm relay (closed with alarm)
Tab. 6.i
Standby corresponds to a situation of rest in which no signals are received
to control the electronic valve. This normally occurs:
• when the refrigeration unit stops operating, either when switched
off manually (e.g. from the button, supervisor) or when reaching the
control set point;
• during defrosts, except for those performed by reversing of the cycle
(or hot gas bypass).
In general, it can be said that the electronic valve driver is in standby when
the compressor stops or the solenoid valve closes. LThe valve is closed or
open according to the setting of “Valve open in standby”. The percentage
of opening is set using “Valve position in standby”. In this phase, manual
positioning can be activated.
6.5 Control status
The electronic valve driver has 6 different types of control status, each
of which may correspond to a specific phase in the operation of the
refrigeration unit and a certain status of the driver-valve system.
The status may be as follows:
• forced closing: initialisation of the valve position when switching the
instrument on;
• standby: no temperature control, unit OFF;
• wait: opening of the valve before starting control, also called prepositioning, when powering the unit and in the delay after defrosting;
• control: effective control of the electronic valve, unit ON;
• positioning: step-change in the valve position, corresponding to the
start of control when the cooling capacity of the controlled unit varies
(only for LAN EVD connected to a pCO);
• stop: end of control with the closing of the valve, corresponds to the
end of temperature control of the refrigeration unit, unit OFF;
• valve motor error recognition: see paragraph 9.5
• tuning in progress: see paragraph 5.3.
Parameter/description
CONTROL
Valve open in standby
0=disabled=valve closed;
1=enabled = valve open according to
parameter “Valve position in standby”
Valve position in standby
0 = 25 % (*)
1…100% = % opening (**)
Parameter/description
VALVE
Minimum EEV steps
Maximum EEV steps
UOM
0
0
1
-
0
0
100
%
Def.
Min. Max. UOM
50
480
0
0
9999 step
9999 step
Tab. 6.l
(*) The formula used is:
Def.
Min.
Max.
UOM
500
0
9999
step
Apertura / Opening =
Min_step_EEV+(Max_step_EEV-Min_step_EEV)/100*25
(**) In this case, the formula used is:
Apertura / Opening = P*(Max_step_EEV / 100)
P = Posizione valvola in stand-by / Position valve in stand-by
1%
0%
Min_step_EEV
Min. Max. UoM
0
255
steps
99%
100%
Max_step_EEV
Fig. 6.c
Note: if “Valve open in standby=1”, the positions of the valve when
setting “Valve position in standby”=0 and 25 do not coincide.
Refer to the above formulae.
Note: delayed control start to recharge battery. If a battery is used
to close the valve in the event of a power failure, to prevent emergency
closing from failing due to repeated blackouts, a delay has been
introduced that can be set by the user depending on the backup system
used (Ultracap or lead-acid battery). This delay, if configured (default =
0), is applied every time the driver is powered on, to allow the battery to
recharge.
0
Max_step_EEV
Fig. 6.b
The valve is closed in the event of power failures with 24 Vac power
supply when the EVD0000UC0 module is connected. In this case, the
parameter “Forced valve closing not completed”, visible only on the
supervisor, is forced to 1. If when restarting forced closing of the valve
was not successful:
1. the Master programmable controller checks the value of the parameter
and if this is equal to 1, decides the best strategy to implement based
on the application;
2. the driver on restart positions the valve as explained in the paragraph
“Pre-positioning/start control The parameter is reset to 0 (zero) by the
Master controller (e.g. pCO), once the parameter has been set to 1
the driver returns it to 0 (zero) only if forced emergency closing is
completed successfully.
Def.
steps
25%
0
Min_step_EEV
Tab. 6.j
Parameter/description
SPECIAL
Max.
These two parameters determine the position of the valve in standby
based on the minimum and maximum number of valve steps.
Forced closing is performed after the driver is powered-up and
corresponds to a number of closing steps equal to the parameter “Closing
steps”, based on the type valve selected. This is used to realign the valve
to the physical position corresponding to completely closed. The driver
and the valve are then ready for control and both aligned at 0 (zero). On
power-up, first a forced closing is performed, and then the standby phase
starts.
VALVE
EEV closing steps
Min.
Tab. 6.k
Forced closing
Parametro/description
Def.
Pre-positioning/start control
If during standby a control request is received, before starting control the
valve is moved to a precise initial position.
IThe pre-position time is the time the valve is held in a steady position
based on the parameter “Valve opening at start-up”.
Parameter/description
Def.
CONTROL
Pre-positioning time
6
Valve opening at start-up (evaporator/valve 50
capacity ratio)
min.
Tab. 6.r
Min.
Max.
UOM
0
0
18000 s
100
%
Tab. 6.m
33
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
ENG
The valve opening parameter should be set based on the ratio between
the rated cooling capacity of the evaporator and the valve (e.g. rated
evaporator cooling capacity: 3kW, rated valve cooling capacity: 10kW,
valve opening = 3/10 = 33%).
A
If the capacity request is 100%:
Opening (%)= (Valve opening at start-up);
S
OFF
t
ON
OFF
If the capacity request is less than 100% (capacity control):
Opening (%)= (Valve opening at start-up) · (Current unit cooling capacity),
where the current unit cooling capacity is sent to the driver via LAN by the
pCO controller. If the driver is stand-alone, this is always equal to 100%.
P
R
T1
A
S
P
R
Some types of refrigerating cabinets have problems controlling the
electronic valve in the operating phase after defrost. In this period (10 to
20 min after defrosting), the superheat measurement may be altered by
the high temperature of the copper pipes and the air, causing excessive
opening of the electronic valve for extended periods, in which there is
return of liquid to the compressors that is not detected by the probes
connected to the driver. In addition, the accumulation of refrigerant in
the evaporator in this phase is difficult to dissipate in a short time, even
after the probes have started to correctly measure the presence of liquid
(superheat value low or null).
The driver can receive information on the defrost phase in progress, via
digital input 2. The “Start-up delay after defrost” parameter is used to set
a delay when control resumes so as to overcome this problem. During
this delay, the valve will remain in the pre-positioning point, while all the
normal probe alarms procedures, etc. managed.
0
60
min
W
T1
T2
t
Wait
Pre-positioning time
Start-up delay after defrost
Time
Note: if information is not available on the variation in unit cooling
capacity, this will always be considered as operating at 100% and therefore
the procedure will never be used. In this case, the PID control must be
more reactive (see the chapter on Control) so as to react promptly to
variations in load that are not communicated to the driver.
Control delay after defrost
10
Control request
Standby
Pre-positioning
Control
This control status is only valid for the driver connected to the pCO via
LAN. If there is a change in unit cooling capacity of at least 10%, sent
from the pCO via the pLAN, the valve is positioned proportionally. In
practice, this involves repositioning starting from the current position in
proportion to how much the cooling capacity of the unit has increased or
decreased in percentage terms. When the calculated position has been
reached, regardless of the time taken (this varies according to the type
of valve and the position), there is a constant 5 second delay before the
actual control phase starts.
The control request can be received by the closing of digital input 1
or via the network (LAN). The solenoid or the compressor are activated
when the valve, following the pre-positioning procedure, has reached
the calculated position. The following figure represents the sequence of
events for starting control of the refrigeration unit.
UOM
t
T2
Positioning (change cooling capacity)
Control
Max.
W
Fig. 6.d
Key:
When the calculated position has been reached, regardless of the
time taken (this varies according to the type of valve and the objective
position), there is a constant 5 second delay before the actual control
phase starts. This is to create a reasonable interval between standby, in
which the variables have no meaning, as there is no flow of refrigerant,
and the effective control phase.
Min.
t
ON
OFF
Wait
Def.
t
ON
OFF
Note:
• this procedure is used to anticipate the movement and bring the valve
significantly closer to the operating position in the phases immediately
after the unit starts;
• if there are problems with liquid return after the refrigeration unit starts
or in units that frequently switch on-off, the valve opening at start-up
must be decreased. If there are problems with low pressure after the
refrigeration unit starts, the valve opening must be increased.
Parameter/description
CONTROL
Start-up delay after defrost
ON
A
ON
OFF
t
C
ON
OFF
t
NP
ON
OFF
t
R
ON
OFF
T3
Tab. 6.n
A
C
NP
R
t
Fig. 6.e
Key:
Important: if the superheat temperature should fall below the set
point, control resumes even if the delay has not yet elapsed.
W
Control request
Change capacity
Repositioning
Control
T3
W
t
Repositioning time
Wait
Time
Stop/end control
The stop procedure involves closing the valve from the current position
until reaching 0 steps, plus a further number of steps so as to guarantee
complete closing. Following the stop phase, the valve returns to standby.
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
34
ENG
A
This procedure is necessary as the stepper motor intrinsically tends to
lose steps during movement. Given that the control phase may last continuously for several hours, it is probable that from a certain time on the
estimated position sent by the valve driver does not correspond exactly
to the physical position of the movable element. This means that when
the driver reaches the estimated fully closed or fully open position,
the valve may physically not be in that position. The “Synchronisation”
procedure allows the driver to perform a certain number of steps in the
suitable direction to realign the valve when fully opened or closed.
ON
OFF
S
t
ON
OFF
ST
t
ON
Note:
OFF
R
• realignment is in intrinsic part of the forced closing procedure and is
activated whenever the driver is stopped/started and in the standby
phase;
• the possibility to enable or disable the synchronisation procedure
depends on the mechanics of the valve. When the setting the “valve”
parameter, the two synchronisation parameters are automatically
defined. The default values should not be changed.
t
ON
OFF
t
T4
Fig. 6.f
Key:
A
S
ST
Control request
Standby
Stop
R
T4
t
Unblock valve
Control
Stop position time
Time
This procedure is only valid when the driver is performing superheat
control. Unblock valve is an automatic safety procedure that attempts to
unblock a valve that is supposedly blocked based on the control variables (superheat, valve position). The unblock procedure may or may not
succeed depending on the extent of the mechanical problem with the
valve. If for 10 minutes the conditions are such as to assume the valve is
blocked, the procedure is run a maximum of 5 times. The symptoms of
a blocked valve do not necessarily mean a mechanical blockage. They
may also represent other situations:
• mechanical blockage of the solenoid valve upstream of the electronic
valve (if installed);
• electrical damage to the solenoid valve upstream of the electronic
valve;
• blockage of the filter upstream of the electronic valve (if installed);
• electrical problems with the electronic valve motor;
• electrical problems in the driver-valve connection cables;
• incorrect driver-valve electrical connection;
• electronic problems with the valve control driver;
• secondary fluid evaporator fan/pump malfunction;
• insufficient refrigerant in the refrigerant circuit;
• refrigerant leaks;
• lack of subcooling in the condenser;
• electrical/mechanical problems with the compressor;
• processing residues or moisture in the refrigerant circuit.
6.6 Advanced control status
As well as normal control status, the driver can have 3 special types of status
related to specific functions:
• manual positioning: this is used to interrupt control so as to move the
valve, setting the desired position;
• recover physical valve position: recover physical valve steps when
fully opened or closed;
• unblock valve: forced valve movement if the driver considers it to be
blocked.
Manual positioning
Manual positioning can be activated at any time during the standby or
control phase. Manual positioning, once enabled, is used to freely set
the position of the valve using the corresponding parameter.
Control is placed on hold, all the system and control alarms are enabled,
however neither control nor the protectors can be activated. Manual
positioning thus has priority over any status/protection of the driver
When the driver is connected to the network (for example to a pCO
controller), in presence of an communication-error (LAN error), manual
positioning can be inhibited temporarily by the parameter and the
driver recognizes the start/stop regulation, depending on the configuration of the digital inputs.
Parameter/description
CONTROL
Enable manual valve position
Manual valve position
Stop manual positioning on network
error
0 = Normal operation; 1 = Stop
Def.
Min.
Max.
UOM
0
0
0
0
0
0
1
9999
1
step
-
Note: the valve unblock procedure is nonetheless performed in
each of these cases, given that it does not cause mechanical or control
problems. Therefore, also check these possible causes before replacing
the valve.
Tab. 6.o
Note:
• the manual positioning status is NOT saved when restarting after a
power failure.
• in for any reason the valve needs to be kept stationary after a power
failure, proceed as follows:
- remove the valve stator;
- in Manufacturer programming mode, under the configuration
parameters, set the PID proportional gain= 0. The valve will remain
stopped at the initial opening position, set by corresponding
parameter.
Recover physical valve position
Parameter/description
VALVE
EEV opening synchroniz.
EEV closing synchroniz.
Def.
Min. Max. UOM
1
1
0
0
1
1
-
Tab. 6.p
35
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
ENG
7. PROTECTORS
These are additional functions that are activated in specific situations that
are potentially dangerous for the unit being controlled. They feature an
integral action, that is, the action increases gradually when moving away
from the activation threshold. They may add to or overlap (disabling)
normal PID superheat control. By separating the management of these
functions from PID control, the parameters can be set separately, allowing,
for example, normal control that is less reactive yet much faster in
responding when exceeding the activation limits of one of the protectors.
When the superheat value falls below the threshold, the system enters
low superheat status, and the intensity with which the valve is closed is
increased: the more the superheat falls below the threshold, the more
intensely the valve will close. The LowSH threshold, must be less than
or equal to the superheat set point. The low superheat integration time
indicates the intensity of the action: the lower the value, the more intense
the action.
The integration time is set automatically based on the type of main
control.
SH
7.1 Protectors
Low_SH_TH
The protectors are 5:
• LowSH, low superheat;
• LOP, low evaporation temperature;
• MOP, high evaporation temperature;
• High Tcond, high condensing temperature;
• Reverse HiTcond.
Low_SH
OFF
A
Note: the HiTcond protectors require an additional probe (S3) to
those normally used, either installed on the driver, or connected via tLAN,
pLAN, RS485/ Modbus® to a controller.
D
t
B
Fig. 7.a
Key:
SH
Low_SH_TH
Low_SH
B
Superheat
Low_SH protection threshold
Low_SH protection
Automatic alarm reset
A
D
t
Alarm
Alarm timeout
Time
Note: The alarm signal is independent from the effectiveness of the
protector, and only signals that the corresponding threshold has been
exceeded. If a protector is disabled (null integration time), the relative
alarm signal is also disabled.
LOP (low evaporation pressure)
LOP= Low Operating Pressure
The LOP protection threshold is applied as a saturated evaporation
temperature value so that it can be easily compared against the technical
specifications supplied by the manufacturers of the compressors. The
protector is activated so as to prevent too low evaporation temperatures
from stopping the compressor due to the activation of the low pressure
switch. The protector is very useful in units with compressors on board
(especially multi-stage), where when starting or increasing capacity the
evaporation temperature tends to drop suddenly.
When the evaporation temperature falls below the low evaporation
temperature threshold, the system enters LOP status and is the intensity
with which the valve is opened is increased. The further the temperature
falls below the threshold, the more intensely the valve will open. The
integration time indicates the intensity of the action: the lower the value,
the more intense the action.
Each protector is affected by the proportional gain parameter (K) for the
PID superheat control. The higher the value of K, the more intense the
reaction of the protector will be.
Characteristics of the protectors
Reaction
Intense closing
Intense opening
Moderate closing
Moderate closing
Moderate opening
t
ON
OFF
The protectors have the following main features:
• activation threshold: depending on the operating conditions of the
controlled unit, this is set in Service programming mode;
• integration time, which determines the intensity (if set to 0, the
protector is disabled): set automatically based on the type of main
control;
• alarm, with activation threshold (the same as the protector) and
timeout (if set to 0 disables the alarm signal).
Protection
LowSH
LOP
MOP
High Tcond
Reverse HiTcond
t
ON
Reset
Immediate
Immediate
Controlled
Controlled
Controlled
Tab. 7.a
Parameter/description
CONTROL
LOP protection threshold
Reaction: summary description of the type of action in controlling the
valve.
Reset: summary description of the type of reset following the activation
of the protector. Reset is controlled to avoid swings around the activation
threshold or immediate reactivation of the protector.
Def. Min.
Max.
UOM
-50
-60
(-76)
0
Protection MOP: °C (°F)
threshold
800
s
0
18000
LowSH (low superheat)
LOP protection integration time 0
ALARM CONFIGURATION
Low evaporation temperature 300
alarm timeout (LOP)
(0= alarm DISABLED)
The protector is activated so as to prevent the return of liquid to the
compressor due to excessively low superheat valves from.
Parameter/description
Def. Min.
Max.
UOM
The integration time is set automatically based on the type of main
control.
CONTROL
LowSH protection threshold
LowSH protection integration
time
ALARM CONFIGURATION
Low superheat alarm timeout
(LowSH) (0= alarm DISABLED)
5
K (°F)
15
-40 (-72) set point
superheat
0
800
300
0
s
18000
Tab. 7.c
Note:
• the LOP threshold must be lower then the rated evaporation
s
temperature of the unit, otherwise it would be activated unnecessarily,
and greater than the calibration of the low pressure switch, otherwise
it would be useless. As an initial approximation it can be set to a value
exactly half-way between the two limits indicated;
• the protector has no purpose in multiplexed systems (showcases)
where the evaporation is kept constant and the status of the individual
electronic valve does not affect the pressure value;
Tab. 7.b
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
s
36
ENG
• the LOP alarm can be used as an alarm to highlight refrigerant leaks by
As the action is integral, it depends directly on the difference between
the evaporation temperature and the activation threshold. The more the
evaporation temperature increases with reference to the MOP threshold,
the more intensely the valve will close. The integration time indicates the
intensity of the action: the lower the value, the more intense the action.
the circuit. A refrigerant leak in fact causes an abnormal lowering of the
evaporation temperature that is proportional, in terms of speed and
extent, to the amount of refrigerant dispersed. T_EVAP
T_EVAP
LOP_TH
MOP_TH
LOP
MOP_TH - 1
t
ON
MOP
OFF
t
ON
OFF
ALARM
t
ON
PID
OFF
OFF
D
T_EVAP
LOP_TH
LOP
B
t
B
ALARM
Fig. 7.b
Key:
D
Alarm timeout
ALARM Alarm
t
t
D
Time
Fig. 7.c
Key:
T_EVAP
PID
MOP
D
MOP (high evaporation pressure)
MOP= Maximum Operating Pressure.
Def.
Min.
Max.
UOM
50
Protection LOP:
threshold
0
200
(392)
800
°C (°F)
0
18000 s
Evaporation temperature
PID superheat control
MOP protection
Alarm timeout
MOP_TH MOP threshold
ALARM Alarm
t
Time
Important: the MOP threshold must be greater than the rated
evaporation temperature of the unit, otherwise it would be activated
unnecessarily. The MOP threshold is often supplied by the manufacturer
of the compressor. It is usually between 10 °C and 15 °C.
The MOP protection threshold is applied as a saturated evaporation
temperature value so that it can be easily compared against the technical
specifications supplied by the manufacturers of the compressors. The
protector is activated so as to prevent too high evaporation temperatures
from causing an excessive workload for the compressor, with consequent
overheating of the motor and possible activation of the thermal protector.
The protector is very useful in self-contained units if starting with a high
refrigerant charge or when there are sudden variations in the load. The
protector is also useful in multiplexed systems (showcases), as allows all
the utilities to be enabled at the same time without causing problems
of high pressure for the compressors. To reduce the evaporation
temperature, the output of the refrigeration unit needs to be decreased.
This can be done by controlled closing of the electronic valve, implying
superheat is no longer controlled, and an increase in the superheat
temperature. The protector will thus have a moderate reaction that tends
to limit the increase in the evaporation temperature, keeping it below the
activation threshold while trying to stop the superheat from increasing
as much as possible. Normal operating conditions will not resume based
on the activation of the protector, but rather on the reduction in the
refrigerant charge that caused the increase in temperature. The system
will therefore remain in the best operating conditions (a little below the
threshold) until the load conditions change.
MOP protection integration time 20
ALARM CONFIGURATION
High evaporation temperature
600
alarm timeout (MOP)
(0= alarm DISABLED)
t
ON
OFF
Evaporation temperature
Low evaporation temperature
protection threshold
LOP protection
Automatic alarm reset
Parameter/description
CONTROL
MOP protection threshold
t
ON
If the closing of the valve also causes an excessive increase in the suction
temperature (S2) above the set threshold – only set via supervisor
(PlantVisor, pCO, VPM), not on the display - the valve will be stopped
to prevent overheating the compressor windings, awaiting a reduction
in the refrigerant charge. If the MOP protection function is disabled by
setting the integral time to zero, the maximum suction temperature
control is also deactivated.
Parameter/description
CONTROL
MOP protection: suction temperature
threshold
Def. Min.
30
Max.
UOM
-60 (-72) 200 (392) °C(°F)
Tab. 7.e
At the end of the MOP protection function, superheat regulation restarts
in a controlled manner to prevent the evaporation temperature from
exceeding the threshold again.
High Tcond (high condensing temperature)
To activate the high condensing temperature protector (High Tcond), a
pressure probe must be connected to input S3.
The protector is activated so as to prevent too high evaporation
temperatures from stopping the compressor due to the activation of the
high pressure switch.
s
Tab. 7.d
The integration time is set automatically based on the type of main
control.
When the evaporation temperature rises above the MOP threshold, the
system enters MOP status, superheat control is interrupted to allow the
pressure to be controlled, and the valve closes slowly, trying to limit the
evaporation temperature.
Parameter/description
ADVANCED
High Tcond threshold
Def.
Min.
Max.
UOM
80
20
200
(392)
800
°C (°F)
High Tcond integration time
ALARM CONFIGURATION
High condensing temperature alarm
timeout (High Tcond)
(0= alarm DISABLED)
-60
(-76)
0
600
0
18000 s
s
Tab. 7.f
The integration time is set automatically based on the type of main
control.
37
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
ENG
Note:
C
• the protector is very useful in units with compressors on board if the
air-cooled condenser is undersized or dirty/malfunctioning in the
more critical operating conditions (high outside temperature);
• the protector has no purpose in multiplexed systems (showcases),
where the condensing pressure is maintained constant and the status
of the individual electronic valves does not affect the pressure value.
L1
CP1
F1
To reduce the condensing temperature, the output of the refrigeration
unit needs to be decreased. This can be done by controlled closing of
the electronic valve, implying superheat is no longer controlled, and
an increase in the superheat temperature. The protector will thus have
a moderate reaction that tends to limit the increase in the condensing
temperature, keeping it below the activation threshold while trying
to stop the superheat from increasing as much as possible. Normal
operating conditions will not resume based on the activation of the
protector, but rather on the reduction in the outside temperature. The
system will therefore remain in the best operating conditions (a little
below the threshold) until the environmental conditions change.
EVD
evolution
S1
S1 S2 S3 S4
V
M
EEV
CHE
P1 T1
P2
L2
T_COND
B
T_COND_TH
CP2
F2
T_COND_TH - ∆
HiTcond
A
ON
t
S2
t
V1 M
OFF
PID
ON
T V2
E
OFF
ALARM
Fig. 7.e
t
ON
Key:
CP1/2 Compressor 1/2
OFF
t
D
Fig. 7.d
Key:
T_COND
High
Tcond
PID
D
Condensing temperature
T_COND_TH High Tcond
threshold
High Tcond protection status ALARM
Alarm
PID superheat control
Alarm timeout
t
CHE
L1/2
F1/2
S1/2
Cascade heat exchanger
Liquid receiver 1/2
Filter-drier 1/2
Liquid gauge 1/2
T1
Temperature probe
EEV
Electronic expansion
valve
C
Condenser
V
Solenoid valve
E
Evaporator
P1/2 Pressure probe
(transducer)
V2
Thermostatic
expansion valve
For the wiring, see paragraph “General connection diagram”
Time
Note: for this type of application, the auxiliary refrigerant must be
set as CO2 (R744).
Note:
Parameter / Description
Refrigerant
Main regulation
• the High Tcond threshold must be greater than the rated condensing
temperature of the unit and lower then the calibration of the high
pressure switch;
• the closing of the valve will be limited if this causes an excessive
decrease in the evaporation temperature.
Auxiliary refrigerant
Def.
Alls refrigerants, not R744
Subcooling regulation 1...10
R744
Reverse HiTcond (for CO2 cascade systems)
The driver controls refrigerant superheat in the primary circuit (A), and
at the same time measures the refrigerant condensing pressure in the
secondary circuit (B). When the condensing temperature exceeds the
HiTCond protection threshold, normal superheat control is overridden by
forced opening of the valve, at a rate that is inversely proportional to the
HiTCond protection integral time. Opening the EEV lowers the superheat
in the primary circuit, which increases the heat exchange coefficient and
consequently reduces the condensing pressure in the secondary circuit.
Important: opening the valve will probably also cause activation of
the low superheat protection LowSH, which tends to limit the opening of
the valve. The ratio between the integral times of these two concurrent
yet opposing protectors determines how effective one is compared to
the other.
The reverse HiTcond threshold for CO2 cascade applications should be
set in relation to the expected evaporation temperature in the primary
circuit. The threshold must be set to a value that is at least 3-5°C higher
than the minimum evaporation temperature in the primary circuit. Lower
values make achieving the set pressure limit incompatible with heat
exchange efficiency. In addition, swings in operation may occur due the
attempt to limit low superheat in the primary circuit and the pressure in
the secondary circuit at the same time.
As mentioned earlier, reverse high condensing temperature protection
(HiTcond) on S3, opens the valve to limit refrigerant circuit condensing
pressure by filling part of the evaporator. The graph of how the function
works is similar to the one shown for HiTCond protection.
This function is especially useful for condensers in CO2 cascade systems,
where condensation in the low temperature circuit (also called
“secondary”, B) takes place when evaporating the refrigerant in the
medium temperature circuit (“primary”, A).
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
38
ENG
A
A
A
Refrigerant:
0= user defined;
1= R22
2= R134a
3= R404A
4= R407C
5= R410A
6= R507A
7= R290
8= R600
9= R600a
10= R717
11= R744
12= R728
13= R1270
14= R417A 15= R422D
16= R413A 17= R422A 18= R423A
19= R407A 20= R427A
21= R245FA 22= R407F 23=R32
24=HTR01 25=HTR02
26= R23
27= R1234yf 28= R1234ze 29= R455A 30= R170
31= R442A 32= R447A 33= R448A
34= R449A 35= R450A
36= R452A 37= R508B 38= R452B
39= R513A 40= R454B
41= R458A
Valve:
0= user defined
13= Sporlan SEH 175 26= CAREL ejector
E2J23AT1N0
X
1= CAREL E V
14= Danfoss ETS
27= CAREL ejector
12.5-25B
E3J26AT2N0
2= Alco EX4
15= Danfoss ETS 50B 28= CAREL ejector
E3J33AU2N0
3= Alco EX5
16= Danfoss ETS 100B 29= CAREL ejector
E3J39AV3N0
4= Alco EX6
17= Danfoss ETS 250 30= CAREL ejector
E6J50AV3N0
5= Alco EX7
18= Danfoss ETS 400 31= Danfoss CCMT 16
X
6= Alco EX8 330Hz
19= Two E V CAREL 32= Danfoss CCMT 24
recommend CAREL connected together
7= Alco EX8 500Hz
20= Sporlan SER(I)
33= Danfoss CCMT 30
specific Alco
G,J,K
8= Sporlan SEI 0.5-11 21= Danfoss CCM
34= Danfoss CCMT 42
10-20-30
9= Sporlan SER 1.5-20 22= Danfoss CCM 40 35= Danfoss Colibri
10= Sporlan SEI 30
23= Danfoss CCM T
2-4-8
11= Sporlan SEI 50
24= Disabled
12= Sporlan SEH 100 25= CAREL ejector
E2J17AS1N0
Probe S1: 0= user defined
Ratiometric (OUT=0…5 V)
Electronic (OUT=4…20 mA)
1= -1…4,2 barg
8= -0,5…7 barg
2= -0,4…9,3 barg
9= 0…10 barg
3= -1…9,3 barg
10= 0…18,2 bar
4= 0…17,3 barg
11= 0…25 barg
5= 0,85…34,2 barg
12= 0…30 barg
6= 0…34,5 barg
13= 0…44,8 barg
7= 0…45 barg
14= remoto, -0,5…7 barg
21= -1…12,8 barg
15= remoto, 0…10 barg
22= 0…20,7 barg
16= remoto, 0…18,2 barg
23= 1,86…43,0 barg
17= remoto, 0…25 barg
24= Livello liquido CAREL
18= remoto, 0…30 barg
25 = 0...60,0 barg
19= remoto, 0…44,8 barg
26 = 0...90,0 barg
20= external signal 4…20 mA
27= external signal 0…5 V
Main control:
0= user defined
1= Centralized cabinet/cold room
2= Self contained cabinet/cold room
3= Perturbated cabinet/control room
4= Subcritical CO2 cabinet/cold room
5= R404A condenser for subcritical CO2
6= AC or chiller with plate evaporator
7= AC or chiller with shell tube evaporator
8= AC or chiller with battery coil evaporator
9= AC or chiller with variable cooling capacity
10= AC or chiller perturbated unit
11= EPR Back pressure
12= Hot gas by-pass by pressure
13= Hot gas by-pass by temperature
14= transcritical CO2 gas cooler
15= analog positioner (4 to 20 mA)
16= analog positioner (0 to10 V)
17= AC/chiller or cabinet/cold room with adaptative regulation
18= AC or chiller with Digital Scroll compressor
19= AC/chiller with BLDC compressor (*)
20= superheat regulation with 2 temperature probes
21= I/O expander for pCO
22= Programmable SH regulation
23= Programmable special regulation
24= Programmable positioner
25= Evaporator liquid level regulation with CAREL sensor
26= Condenser liquid level regulation with CAREL sensor
(*)= only for controls for CAREL valves
Max.
UOM
pLAN: 30
others: 198
R404A
1
207
-
I
11
138
-
-
-
I
13
140
CAREL EXV
-
-
-
I
14
141
Ratiometric: -1 to 9.3 barg
-
-
I
16
143
Multiplexed cabinet/cold
room
-
-
I
15
142
39
Notes
Min.
Modbus®
A
CONFIGURATION
Network address
Def.
CAREL
SVP
A
Parameter/description
Type **
user*
8. PARAMETERS TABLE
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
Def.
Min.
Max.
UOM
CAREL
SVP
Modbus®
A
Probe S2:
0= user defined
1= NTC CAREL
2= CAREL NTC- HT high
3= combined NTC SPKP**T0
4= 0 to 10V external signal 5= NTC – LT CAREL low temperature
Auxiliary control:
0= user defined
1= Disabled
2= high condensing temperature protection on S3 probe
3= modulating thermostat on S4 probe
4= backup probes on S3 and S4
5, 6, 7 = Reserved
8= Subcooling measurement
9= Inverse high condensation temperature protection on S3 probe
10= Reserved
Probe S3
0= user defined
Ratiometric (OUT=0 to 5 V)
Electronic (OUT=4 to 20 mA)
1= -1…4,2 barg
8= -0.5…7 barg
2= -0,4…9,3 barg
9= 0…10 barg
3= -1…9,3 barg
10= 0…18,2 bar
4= 0…17,3 barg
11= 0…25 barg
5= 0,85…34,2 barg 12= 0…30 barg
6= 0…34,5 barg
13= 0…44,8 barg
7= 0…45 barg
14= remote, -0,5…7 barg
15= remote, 0…10 barg
16= remote, 0…18,2 barg
17= remote, 0…25 barg
18= remote, 0…30 barg
19= remote, 0…44,8 barg
20= 4…20 mA external signal
21= -1 to 12.8 barg
22= 0 to 20.7 barg
23= 1.86 to 43.0 barg
24= CAREL liquid level
25 = 0...60,0 barg
26 = 0...90,0 barg
27= external signal 0…5 V
Relay configuration:
1= Disabled
2= alarm relay (opened in case of alarm)
3= Solenoid valve relay (open in standby)
4= valve + alarm relay (opened in stand-by and control alarms)
5= Reversed alarm relay (closed in case of alarm)
6= Valve status relay (open if valve closed)
7= Direct command
8= Faulty closure alarm relay (opened if alarm)
9= Reverse faulty closure alarm relay (closed if alarm)
Probe S4:
0= User defined
1= CAREL NTC
2= CAREL NTC-HT high temperature
3= NTC built-in SPKP**T0
4= --5= NTC-LT CAREL low temperature
DI2 configuration:
1= Disabled
2= valve regulation optimization after defrost
3= Battery alarm management
4= Valve forced open (at 100%)
5= Regulation start/stop
6= Regulation backup
7= Regulation security
Display main var. 1:
1= Valve opening
13= Hot gas bypass pressure
2= Valve position
14= Hot gas bypass temperature
3= Current cool. capacity
15= CO2 gas cooler outlet temperature
4= Control set point
16= CO2 gas cooler outlet pressure
5= Superheat
17= CO2 gas cooler pressure set point
6= Suction temperature
18= S1 probe measurement
7= Evaporation temperature 19= S2 probe measurement
8= Evaporation pressure
20= S3 probe measurement
9= Condensing temperature 21= S4 probe measurement
10= Condensing pressure
22= 4-20 mA input value
11= Modulating thermostat 23= 0-10 V input value
temperature
12= EPR pressure
Display main var. 2 (See display main var. 1)
CAREL NTC
-
-
-
I
17
144
Disabled
-
-
-
I
18
145
Ratiometric: -1 to 9.3 barg
-
-
I
19
146
Alarm relay
-
-
-
I
12
139
Not used
-
-
-
I
20
147
Disabled
-
-
-
I
10
137
Superheat
-
-
-
I
45
172
Valve opening -
-
-
I
46
173
A
A
A
A
A
C
C
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
40
Notes
Parameter/description
Type **
user*
ENG
-
-
I
24
151
Valve at fixed position
-
-
I
25
152
No action
-
-
-
I
26
153
No action
-
-
-
I
27
154
°C(K), barg
Regulation
start/stop
(tLAN-RS485)
/ Regulation
backup
(pLAN)
-
-
I
I
21
85
148
212
English
0
-
-
-
I
96
223
0
-60(-870), -60
60(870), 60
A
34
33
S1 calibrat gain on 4-20 mA
S1 pressure MINIMUM value
1
-1
-20
-20 (-290)
A
A
36
32
35
31
C
S1 pressure MAXIMUM value
9.3
barg (psig)
A
30
29
C
S1 alarm MIN pressure
-1
S1 pressure
MINIMUM
value
-20 (-290)
20
S1 pressure
MAXIMUM
value
200 (2900)
barg (psig)
mA
barg (psig)
A
39
38
C
S1 alarm MAX pressure
9.3
S1 alarm MAX barg (psig)
pressure
200 (2900)
barg (psig)
A
37
36
C
C
S2 calibration offset
S2 alarm MIN temperat
0
-50
A
A
41
46
40
45
C
S2 alarm MAX temperat
105
20 (36), 20
°C (°F), volt
S2 alarm MAX °C(°F)
temp.
200 (392)
°C(°F)
A
44
43
C
C
C
S3 calibrat offset
S3 calibration gain on 4 to 20 mA (cannot be selected)
S3 pressure MINIMUM value
0
1
-1
barg (psig)
barg (psig)
A
A
A
35
83
33
34
81
32
C
S3 pressure MAXIMUM value
9.3
60(870)
20
S3 pressure
MAXIMUM
value
200 (2900)
barg (psig)
A
31
30
C
S3 alarm MIN pressure
-1
A
40
39
C
S3 probe alarm MAX pressure
9.3
S3 alarm MAX barg (psig)
pressure
200 (2900)
barg (psig)
A
38
37
C
C
S4 calibrat. offset
S4 alarm MIN temperat.
0
-50
A
A
42
47
41
46
C
S4 alarm MAX temperat.
105
20 (36)
°C (°F)
S4 alarm MAX °C (°F)
temp.
200 (392)
°C (°F)
A
45
44
C
C
C
C
C
C
C
C
S1/S3 Maximum difference (pressure)
S2/S4 Maximum difference (temperature)
Alarm delay S1
Alarm delay S2
Alarm delay S3
Alarm delay S4
Enable S1
Enable S2
0
0
0
0
0
0
1
1
200(2900)
180(324)
240
240
240
240
1
1
A
A
I
I
I
I
D
D
114 113
115 114
131 258
132 259
133 260
134 261
16 15
17 16
Def.
C
C
S1 probe alarm manag.:
1= No action
2= Valve forced closed
3= Valve at fixed posit.
4= Use backup probe S3
S2 probe alarm manag.:
1= No action
2= Valve forced closed
3= Valve at fixed posit.
4= Use backup probe S4
S3 probe alarm manag.:
1= No action
2= Valve forced closed
3= Valve at fixed posit.
S3 probe alarm manag.:
1= No action
2= Valve forced closed
3= Valve at fixed posit.
Unit of measure: °C/K/barg; °F/psig
DI1 configuration
1= Disabled
2= Valve regulation optimization after defrost
3= Discharged battery alarm management
4= Valve forced open (at 100%)
5= Regulation start/stop
6= Regulation backup
7= Regulation security
Language: Italian; English
Auxiliary refrigerant
-1= user defined; 0 = same as main regulation
1= R22
2= R134a
3= R404A
4= R407C
6= R507A
7= R290
8= R600
9= R600a
11= R744
12= R728
13= R1270
14= R417A
16= R413A 17= R422A 18= R423A
19= R407A
21= R245FA 22= R407F 23=R32
24=HTR01
26=R23
27 = R1234yf 28 = R1234ze 29 = R455A
31 = R442A 32 = R447A 33 = R448A
34 = R449A
36 = R452A 37 = R508B 38 = R452B
39 = R513A
41 = R458A
PROBES
S1 calibration offset
C
C
C
C
C
C
A
A
C
Min.
Notes
Modbus®
Valve at fixed position
Parameter/description
Type **
UOM
user*
Max.
CAREL
SVP
ENG
5= R410A
10= R717
15= R422D
20= R427A
25=HTR02
30 = R170
35 = R450A
40 = R454B
S1 alarm MIN
pressure
-20 (-36), -20
-85(-121)
S2 alarm MIN
temp.
60(-870)
-20
-20 (-290)
S3 pressure
MINIMUM
value
-20 (-290)
S3 alarm MIN
pressure
-20 (-36)
-85(-121)
S4 alarm MIN
temp.
0
0
0
0
0
0
0
0
41
bar(psig)
°C (°F)
s
s
s
s
-
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
Parameter/description
Def.
Min.
Max.
UOM
Type **
CAREL
SVP
Modbus®
C
C
Enable S3
Enable S4
CONTROL
Superheat set point
1
1
0
0
1
1
-
D
D
18
19
17
18
11
180 (324)
K(°R)
A
50
49
100
1
%
-
I
D
37
23
164
22
100
%
I
91
218
min
s
°C (°F)
barg (psig)
barg (psig)
s
s
K(°F)
I
I
A
A
A
A
I
A
A
40
90
28
62
29
48
38
49
56
167
217
27
61
28
47
165
48
55
s
°C (°F)
A
A
55
52
54
51
s
°C (°F)
A
A
51
54
50
53
s
step
K (F°)
°C (°F)
%
A
D
I
A
A
A
53
24
39
100
101
118
52
23
166
99
100
117
A
Notes
user*
ENG
50
0
0
0
C
A
A
A
A
C
C
C
A
Valve opening at start-up
Valve opened in standby
(0=disabled=valve closed; 1=enabled = valve open according to
parameter “Valve position in stand-by”)
Valve position in stand-by
0 = 25%
1…100% = % opening
start-up delay after defrost
Pre-position time
Hot gas bypass temperature set point
Hot gas bypass pressure set point
EPR pressure set point
PID proportional gain
PID integral time
PID derivative time
LowSH protection threshold
LowSH:
threshold
0
0
10
6
10
3
3.5
15
150
5
5
0
0
-85(-121)
-20 (-290)
-20 (-290)
0
0
0
-40 (-72)
C
A
LowSH protection integral time
LOP protection threshold
15
-50
C
A
LOP protection integral time
MOP protection threshold
0
50
C
A
A
C
C
C
MOP protection integral time
Enable manual valve position
Manual valve position
Discharge superheat setpoint
Discharge temperature setpoint
Liquid level perc. set point
ADVANCED
High Tcond threshold
High Tcond integral time
Modul thermost setpoint
Modul thermost differential
Modul thermost SHset offset
CO2 regul. 'A' coefficient
CO2 regul. 'B' coefficient
Start manual tuning 0 = no; 1= yes
Tuning method
0…100= automatic selection
101…141= manual selection
142…254=not accepted
255= PID parameters identified model
Network settings
Parity
Bit di stop
Baud rate
0
no parity
2 stop bits
4800 bps
1
no parity
2 stop bits
9600 bps
2
no parity
2 stop bits
19200 bps
4
no parity
1 stop bit
4800 bps
5
no parity
1 stop bit
9600 bps
6
no parity
1 stop bit
19200 bps
16 even
2 stop bits
4800 bps
17 even
2 stop bits
9600 bps
18 even
2 stop bits
19200 bps
20 even
1 stop bit
4800 bps
21 even
1 stop bit
9600 bps
22 even
1 stop bit
19200 bps
24 odd
2 stop bits
4800 bps
25 odd
2 stop bits
9600 bps
26 odd
2 stop bits
19200 bps
28 odd
1 stop bit
4800 bps
29 odd
1 stop bit
9600 bps
30 odd
1 stop bit
19200 bps
Power supply mode
0= 24 Vac; 1= 24 Vdc
Enable mode single on twin (parameter disabled)
0= Twin; 1= Single
Stop manual positioning if net error
0 = Normal operation; 1 = Stop
Programmable regulation configuration
Programmable regulation input
Programmable SH regulation options
Programmable regulation set point
20
0
0
35
105
50
60
18000
200 (392)
200 (2900)
200 (2900)
800
1000
800
superheat set
point
0
800
-85(-121)
MOP protection threshold
0
800
LOP protection 200 (392)
threshold
0
800
0
1
0
9999
-40(-72)
180 (324)
-85(-121)
200 (392)
0
100
80
20
0
0, 1
0
3.3
-22.7
0
50
-85(-121)
0
-85(-121)
0.1 (0.2)
0 (0)
-100
-100
0
0
200 (392)
800
200 (392)
100 (180)
100 (180)
800
800
1
255
°C (°F)
s
°C (°F)
°C (°F)
K (°F)
-
A
A
A
A
A
A
A
D
I
58
57
61
60
59
63
64
39
79
57
56
60
59
58
62
63
38
206
-
2
0
30
bit/s
I
74
201
CO
0
0
1
-
D
47
46
0
0
1
-
D
58
57
0
0
1
-
D
59
58
0
0
0
0
0
0
0
-800(-1233)
32767
32767
32767
800(1233)
-
I
I
I
A
101
102
103
112
228
229
230
111
A
C
C
A
C
A
A
C
C
C
C
C
C
A
C
C
C
C
C
C
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
42
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
Max.
UOM
-288
-15818
-14829
16804
-11664
16416
-23322
-16959
-16378
15910
-2927
-17239
-433
-15815
-15615
16805
30803
16416
-21587
-16995
-24698
15900
10057
-17253
0
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
-32768
0
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
1
-
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
D
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
49
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
48
0
0
250
min
I
135 262
300
0
18000
s
I
43
170
300
0
18000
s
I
41
168
600
0
18000
s
I
42
169
600
0
18000
s
I
44
171
-50
300
-85 (-121)
0
200 (392)
18000
°C(°F)
s
A
I
26
9
25
136
0
0
0
0
0
0
0
0
240
240
240
240
s
s
s
s
I
I
I
I
131
132
133
134
258
259
260
261
50
480
500
50
450
100
30
1
1
0
0
0
1
0
0
1
0
0
9999
9999
9999
2000
800
250
100
1
1
step
step
step
step/s
mA
mA
%
-
I
I
I
I
I
I
I
D
D
30
31
36
32
33
35
34
20
21
157
158
163
159
160
162
161
19
20
Notes
CUSTOMIZED REFRIGERANT
Dew a high
Dew a low
Dew b high
Dew b low
Dew c high
Dew c low
Dew d high
Dew d low
Dew e high
Dew e low
Dew f high
Dew f low
Bubble a high
Bubble a low
Bubble b high
Bubble b low
Bubble c high
Bubble c low
Bubble d high
Bubble d low
Bubble e high
Bubble e low
Bubble f high
Bubble f low
Faulty closure alarm status
0/1=no/yes
Battery charge delay
ALARMS CONFIGURATION
Low superheat alarm timeout (LowSH)
(0= alarm DISABLED)
Low evap temp alarm timeout (LOP)
(0= alarm DISABLED)
High evap temp alarm timeout (MOP)
(0= alarm DISABLED)
High cond temp alarm timeout (High Tcond)
(0= alarm DISABLED)
Low suction temperature alarm threshold
Low suct temp alarm timeout
(0= alarm DISABLED)
Alarm delay S1
Alarm delay S2
Alarm delay S3
Alarm delay S4
VALVE
EEV minimum steps
EEV maximum steps
EEV closing steps
EEV nominal step rate
EEV nominal current
EEV holding current
EEV duty cycle
EEV opening synchroniz.
EEV closing synchroniz.
Min.
Modbus®
C
Def.
CAREL
SVP
Parameter/description
Type **
user*
ENG
Tab. 8.a
* User: A= Service (installer), C= Manufacturer.
**Type of variable: A= analogue, D= digital, I= integer
8.1 Unit of measure
In the configuration parameters menu, with access by manufacturer
password, the user can choose the unit of measure for the driver:
• international system (°C, K, barg);
• imperial system (°F, psig).
Example 1: The pressure read is 100 barg, this will be immediately
converted to the corresponding value of 1450 psig.
Example 2: The “superheat set point” parameter set to 10 K will be
immediately converted to the corresponding value of 18 °F.
Example 3: The “S4 alarm MAX temp.” parameter, set to 150 °C, will be
immediately converted to the corresponding value of 302 °F
•
Important: the drivers EVD evolution-pLAN (code EVD000E1* and
EVD0000E4*), connected in pLAN to a pCO controller, do not manage the
change of the unit of measure.
Note: due to limits in the internal arithmetic of the driver, pressure
values above 200 barg (2900 psig) and temperature values above 200 °C
(392 °F) cannot be converted.
Note: the unit of measure K relate to degrees Kelvin adopted for
measuring the superheat and the related parameters.
When changing the unit of measure, all the values of the parameters
saved on the driver and all the measurements read by the probes will
be recalculated. This means that when changing the units of measure,
control remains unaltered.
43
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
ENG
AL.
ALARMS
PROTECT.
ACTIVATED
ALARMS
8.2 Variables accessible via serial connection
Description
Probe S1 reading
Probe S2 reading
Probe S3 reading
Probe S4 reading
Suction temperature
Evaporation temperature
Evaporation pressure
Hot gas bypass temperature
EPR pressure (back pressure)
Superheat
Condensing pressure
Condensing temperature
Modulating thermostat temperature
Hot gas bypass pressure
CO2 gas cooler outlet pressure
CO2 gas cooler outlet temperature
Valve opening
CO2 gas cooler pressure set point
4-20 mA input value
0-10 V input value
Control set point
Driver firmware version
MOP: suction temperature threshold (S2)
Discharge superheat
Discharge temperature
Thermal time constant NTC probe S4
MOP: High evaporation temperature threshold
Condensation pressure for subcooling measure
Condensation bubble point
Condensation liquid temperature
Subcooling
Liquid regulation evaporator/ condenser level percentage
Valve position
Current cooling capacity
Adaptive control status
Last tuning result
Extended measured probe S1 (*)
Extended measured probe S3 (*)
Valve emergency closing speed
Control mode (BLDC comp.)
Type of unit for serial comm.
HW code for serial comm.
Reading of probe S1*40
Reading of probe S2*40
Reading of probe S3*40
Reading of probe S4*40
Low suction temperature
LAN error
EEPROM damaged
Probe S1
Probe S2
Probe S3
Probe S4
EEV motor error
Relay status
LOP (low evaporation temperature)
MOP high evaporation temperature)
LowSH (low superheat)
HiTcond (high condensing temperature)
LOP (low evaporation temperature)
MOP (high evaporation temperature)
LowSH (low superheat)
High Tcond (high condensing temperature)
DI1 digital input status
DI2 digital input status
Guided initial procedure completed
Adaptive control ineffective
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4
0
0
0
30
0
0
50
50
0
0
0
0
0
0
0
Min
Max
-20 (-290)
200 (2900)
-85(-121)
200 (392)
-20 (-290)
200 (2900)
-85(-121)
200 (392)
-85(-121)
200 (392)
-85(-121)
200 (392)
-85(-121)
200 (2900)
-85(-121)
200 (392)
-20 (-290)
200 (2900)
-40 (-72)
180 (324)
-20 (-290)
200 (2900)
-85(-121)
200 (392)
-85(-121)
200 (392)
-20 (-290)
200 (2900)
-20 (-290)
200 (2900)
-85(-121)
200 (392)
0
100
-20 (-290)
200 (2900)
4
20
0
10
-60 (-870)
200 (2900)
0
10
-85(-121)
200(392)
-40(-72)
180(324)
-85(-121)
200(392)
1
800
LOP: threshold 200 (392)
-20(-290)
200(2900)
-85(-121)
200(392)
-85(-121)
200(392)
-40(-72)
180(324)
0
100
0
9999
0
100
0
0
6
8
Type
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
I
I
CAREL SVP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
25
102
104
105
106
107
108
109
110
111
116
4
7
Modbus®
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
24
101
103
104
105
106
107
108
109
110
115
131
134
R/W
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R/W
R
R
R/W
R/W
R
R
R
R
R
R
R/W
0
0
150
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-2000 (-2901)
-2000 (-2901)
1
1
0
0
-32768
-32768
-32768
-32768
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
20000 (29007)
20000 (29007)
2000
3
32767
32767
32767
32767
32767
32767
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
I
I
I
I
I
I
I
I
I
I
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
83
84
86
89
94
95
97
98
99
100
1
2
3
4
5
6
7
8
9
50
51
52
53
10
11
12
13
14
15
22
40
210
211
213
216
221
222
224
225
226
227
0
1
2
3
4
5
6
7
8
49
50
51
52
9
10
11
12
13
14
21
39
R
R
R/W
R/W
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R/W
R
Mains power failure
DI Control backup
Forced valve closing not completed
Direct relay control
Enable LAN mode on service serial port (RESERVED)
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
D
D
D
D
D
45
46
49
57
60
44
45
48
56
59
R
R/W
R/W
R/W
R/W
0
0
(*) The displayed variable is to be divided by 100, and allows us to appreciate the hundredth of a bar (psig).
Type of variable:
A= analogue,
D= digital,
I= integer
SVP= variable address with CAREL protocol on 485 serial card.
Modbus®: variable address with Modbus® protocol on 485 serial card.
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
44
I
I
75
76
202
203
R
R
Tab. 8.b
ENG
8.3 Variablesusedbasedonthetypeof control
I/O expander
for pCO
Control with
level sensor




































































EPR back
pressure
AC or chiller
with Digital
Scroll compr.




Superheat regulation with
2 temperature
probes




AC/chiller with
BLDC compres.



Hot gas bypass / pressure
Valve opening(%)
Valve position (step)
Current unit cooling capacity
Control setpoint
Superheat
Suction temperature
Evaporation temperature
Evaporation pressure
Condensing temperature
Condensing pressure
Modulating thermostat temperature
EPR pressure (back pressure)
Hot gas bypass pressure
Hot gas bypass temperature
CO2 gas cooler outlet temperature
CO2 gas cooler outlet pressure
CO2 gas cooler pressure set point
Condensation pressure for subcooling
measure (SBC)
Condensation Temperature bubble
for subcooling measure (SBC)
Liquid temperature for subcooling
measure (SBC)
Subcooling measurement
S1 probe measurement
S2 probe measurement
S3 probe measurement
S4 probe measurement
4 to 20 mA input value
0 to 10 Vdc input value
DI1 digital input status (*)
DI2 digital input status (*)
EVD firmware version
Display firmware version
Adaptative regulation status
0= Not enabled or stopped
1= Monitoring superheat
2= Monitoring suction temperature
3= Wait superheat stabilisation
4= Wait suction temperature stabilisation
5= Applying step
6= Positioning valve
7= Sampling response to step
8=Wait stabilisation in response to step
9= Wait tuning improvement
10= Stop, max attempts exceeded
Last tuning result
0= No attempt performed
1= Attempt interrupted
2= Step application error
3= Time constant/delay error
4= Model error
5= Tuning ended successfully on suction
temperature
6= Tuning ended successfully on superheat
Discharge superheat
Discharge temperature
Liquid level percentage
Transcritical
CO2
Variable displayed
Main control
Superheat control
Auxiliary control
HiTcond/
SubcoModulat.
oling
HiTcond
thermostat
measure
inverse































Hot gas by-pass
/ temperature
The following table shows the variables used by the driver depending on
the values of the Main control and Auxiliary control parameters.
These variables can be shown on the display by accessing display mode
(see paragraph 3.3 Display mode and via a serial connection with VPM,
PlantVisorPRO. Proceed as follows to display the variables:
• press UP/DOWN;
• press the DOWN button to move to the next variable/screen;
• press Esc to return to the standard display.










































































Tab. 8.c
(*) Digital input status: 0= open, 1= closed.
Note: the readings of probes S1, S2, S3, S4 are always displayed,
regardless of whether or not the probe is connected.
45
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
ENG
9. ALARMS
9.1 Alarms
The display shows both types of alarms, in two different modes:
• system alarm: on the main page, the ALARM message is displayed,
There are two types of alarms:
• system: valve motor, EEPROM, probe and communication;
• control: low superheat, LOP, MOP, high condensing temperature, low
suction temperature.
The activation of the alarms depends on the setting of the threshold and
activation delay (timeout) parameters. Setting the timeout to 0 disables
the alarms. The EEPROM unit parameters and operating parameters alarm
always stops control.
All the alarms are reset automatically, once the causes are no longer
present. The alarm relay contact will open if the relay is configured as
alarm relay using the corresponding parameter. The signalling of the
alarm event on the driver depends on whether the LED board or the
display board is fitted, as shown in the table below.
flashing. Pressing the Help button displays the description of the alarm
and, at the top right, the total number of active alarms.
OFF
Surriscaldam.
4.9 K
Apertura
valvola
Eeprom
danneggiata
ALARM
44 %
Rele
Fig. 9.b
• control alarm: next to the flashing ALARM message, the main page
shows the type of protector activated.
Note: the alarm LED only comes on for the system alarms, and not
for the control alarms.
ON
MOP
ALARM
Surriscaldam.
Example: display system alarm on LED board:
4.9 K
Apertura
valvola
44 %
EVD evolution
Rele
Fig. 9.c
Note:
• to display the alarm queue, press the Help button and scroll using the
Fig. 9.a
UP/DOWN buttons;
• the control alarms can be disabled by setting the corresponding
Note: the alarm LED comes on to signal a mains power failure only
if the EVBAT*** module (accessory) has been connected, guaranteeing
the power required to close the valve.
timeout to zero.
Table of alarms
Type of alarm
Cause of alarm
LED
Display
Relay
Reset
Probe S1
Probe S1 faulty
or exceeded set
alarm range
red alarm ALARM flashing
LED
Depends on
configuration
parameter
automatic
Probe S2
Probe S2 faulty
or exceeded set
alarm range
red alarm ALARM flashing
LED
Depends on
configuration
parameter
automatic
Probe S3
Probe S3 faulty
or exceeded set
alarm range
red alarm ALARM flashing
LED
Depends on
configuration
parameter
automatic
Probe S4
Probe S4 faulty
or exceeded set
alarm range
red alarm ALARM flashing
LED
Depends on
configuration
parameter
automatic
(LowSH) low
superheat
LowSH protection activated
Depends on
configuration
parameter
Depends on
configuration
parameter
Depends on
configuration
parameter
Depends on
configuration
parameter
Depends on
configuration
parameter
Depends on
configuration
parameter
automatic
(LOP) low evapo- LOP protection
ration temperaactivated
ture
(MOP) high
MOP protection evaporation
activated
temperature
(High Tcond) high High Tcond pro- conden tempetection activated
rature
Low suction
Threshold and
temperature
timeout exceeded
ALARM & LowSH
flashing
ALARM & LOP
flashing
ALARM & MOP
flashing
ALARM & MOP
flashing
ALARM flashing
EEPROM damaged EEPROM for
red alarm ALARM flashing
operating and/or LED
unit parameters
damaged
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
46
Effect on control Checks/ solutions
Depends on pa- Check the probe connections. Check
rameter “S1 probe the “S1 probe alarm manag.”, and “S1
alarm manag.”
alarm MIN & MAX pressure” parameters
Depends on pa- Check the probe connections. Check
rameter “S2 probe the “S2 probe alarm manag.”, and
alarm manag.”
“S2 alarm MIN & MAX temperature”
parameters
Depends on pa- Check the probe connections. Check
rameter “S3 probe the “S3 probe alarm manag.”, and “S3
alarm manag.”
alarm MIN & MAX pressure” parameters
Depends on pa- Check the probe connections. Check
rameter “S4 probe the “S4 probe alarm manag.”, and
alarm manag.”
“S4 alarm MIN & MAX temperature”
parameters
Protection action Check the “LowSH alarm threshold
already active
and timeout” parameters
automatic
Protection action Check the “LOP alarm threshold and
already active
timeout” parameters
automatic
Protection action Check the “MOP alarm threshold and
already active
timeout” parameters”
automatic
Protection action Check the “Hitcond alarm threshold
already active
and timeout” parameters”
automatic
No effect
Check the threshold and timeout
parameters.
Replace driver/Contact
service
Total shutdown
Replace the driver/Contact service
ENG
Type of alarm
EEV motor error
Valve motor fault, red alarm ALARM flashing
not connected
LED
Cause of alarm
LED
Display
LAN error
LAN network
communication
error
LAN network
connection error
green
NET LED
flashing
NET LED
off
ALARM flashing
Display
connection error
Adaptive control
ineffective
Battery
discharged (**)
Wrong power
supply mode (*)
Pressure difference
Temperature
difference
No communication between
driver and display
Tuning failed
-
ALARM flashing
Relay
Reset
Depends on
configuration
parameter
Depends on
configuration
parameter
Depends on
configuration
parameter
automatic
automatic
automatic
Effect on control Checks/ solutions
Interruption
Check the connections and the condition of the motor
Switch driver off and on again
Control based on Check the network address settings
DI1/DI2
Control based on Check the connections and that the
DI1/DI2
pCO is on and working
Error message
No change
replace the No effect
driver/display
Check the driver/display and the
connectors
ALARM flashing
No change
automatic
No effect
Battery discharged red alarm Alarm flashing
or faulty or elec- LED
trical connection flashing
interrupted
DC driver power Green
supply with “Po- POWER
wer supply mode” LED
parameter set to flashinAC power supply gRed
alarm
LED
Maximum pressu- Red alarm ALARM flashing
re difference th- LED
reshold exceeded
(S1-S3)
Maximum pressu- Red alarm ALARM flashing
re difference th- LED
reshold exceeded
(S2-S4)
No change
replace the
battery
No effect
Change “Main control” parameter
setting
If the alarm persists for more than 3
hours (recharge time for EVBAT00500)
replace the battery
Depends on the
configuration
parameter
Change
Total shutdown
“Power
supply mode”
parameter
setting
Depends on the
configuration
parameter
Automatic
Depends on the
configuration
parameter
Automatic
Check the “Power supply mode” parameter and power supply
Depends on the Check the probe connections. Check
"Probe S1/S3
the "Probe S1/S3 alarm management"
alarm manageand "Pressure S1/S3: MINIMUM and
ment" parameters MAXIMUM alarm values" parameters
Depends on the Check the probe connections. Check
"Probe S2/S4
the "Probe S2/S4 alarm management"
alarm manageand "Temperature S2/S4: MINIMUM
ment" parameters and MAXIMUM alarm values" parameters
(*) In the event of AC power supply with the “Power supply mode” parameter set to DC no alarm is displayed
(**) Alarm only visible if driver connected to EVDBAT00400 battery module and digital input configured accordingly.
Tab. 9.a
9.2 Alarm relay configuration
The relay contact is open when the driver is not powered.
During normal operation, it can be disabled (and thus will be always
open) or configured as:
• alarm relay: during normal operation, the relay contact is closed, and
opens when any alarm is activated. It can be used to switch off the
compressor and the system in the event of alarms.
• solenoid valve relay: during normal operation, the relay contact is
closed, and is open only in standby. There is no change in the event
of alarms.
• solenoid valve relay + alarm: during normal operation, the relay
contact is closed, and opens in standby and/or for LowSH, MOP, High
Tcond and low suction temperature alarms. This is because following
such alarms, the user may want to protect the unit by stopping the
flow of refrigerant or switching off the compressor.
• direct control: the relay is managed using a variable accessible via
serial;
• failed closing alarm relay (open with alarm);
• reverse failed closing alarm relay (closed with alarm).
Note:
the “Battery discharged” alarm:
• has no affect on the positioning of the valve, it is signal-only;
• is not activated if the driver has a direct current power supply (Vdc).
Parameter/description
Relay configuration:
1=Disabled
2=alarm relay (opened in case of alarm)
3=Solenoid valve relay (open in standby)
4=valve + alarm relay (opened in stand-by and control alarms)
5= Reversed alarm relay (closed in case of alarm)
6= Valve status relay (open if valve is closed)
7= Direct control
8= Failed closing alarm relay(open with alarm)
9= Reverse failed closing alarm relay (closed with alarm)
Def.
Alarm
relay
Tab. 9.b
In the event of a mains power failure, if the driver is connected to the
Ultracap module, the forced emergency valve closing procedure starts
and the red LED comes. At the end of the emergency closing procedure,
the outcome is indicated by the value of the parameter “Failed closing
alarm status”:
0 = Closing successful;
1 = Closing failed.
The driver will then switch off. If the closing procedure fails, when next
restarting, if the parameter “Relay configuration” = 8 or 9 the display will
show the “Battery discharged” alarm and the relay will be activated based
on the setting (open or closed).
47
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
ENG
9.3 Probe alarms
Parameter/description
CONTROL
Valve opening at start-up (evaporator/valve
capacity ratio)
The probe alarms are part of the system alarms. When the value measured
by one of the probes is outside of the field defined by the parameters
corresponding to the alarm limits, an alarm is activated. The limits can be
set independently of the range of measurement. Consequently, the field
outside of which the alarm is signalled can be restricted, to ensure greater
safety of the controlled unit.
Def.
Min.
Max.
UOM
1
1
1
1
0
0
0
0
1
1
1
1
-
9.4 Control alarms
These are alarms that are only activated during regulation.
Protector alarms
The alarms corresponding to the LowSH, LOP, MOP and High Tcond
protectors are only activated during control when the corresponding
activation threshold is exceeded, and only when the timeout defined by
the corresponding parameter has elapsed. If a protector is not enabled
(integration time= 0 s), no alarm will be signalled. If before the expiry
of the timeout, the protector control variable returns back inside the
corresponding threshold, no alarm will be signalled.
Tab. 9.c
Note:
• the alarm limits can also be set outside of the range of measurement,
to avoid unwanted probe alarms. In this case, the correct operation
of the unit or the correct signalling of alarms will not be guaranteed;
• by default, after having selected the type of probe used, the alarm
limits will be automatically set to the limits corresponding to the range
of measurement of the probe.
Parameter/description
PROBES
S1 alarm MIN pressure
(S1_AL_MIN)
S1 alarm MAX pressure
(S1_AL_MAX)
Alarm delay S1
S2 alarm MIN temp.
(S2_AL_MIN)
S2 alarm MAX temp.
(S2_AL_MAX)
Alarm delay S2
S3 alarm MIN pressure
(S3_AL_MIN)
S3 alarm MAX pressure
(S3_AL_MAX)
Alarm delay S3
S4 alarm MIN temp.
(S4_AL_MIN)
S4 alarm MAX temp.
(S4_AL_MAX)
Alarm delay S4
Def.
Min.
Max.
-1
-20 (-290)
S1_AL_MAX barg (psig)
9.3
S1_AL_MIN
200 (2900) barg (psig)
0
-50
0
-60
240
S2_AL_MAX
s
°C/°F
105
S2_AL_MIN
200 (392)
°C (°F)
0
-1
0
-20
240
s
S3_AL_MAX barg (psig)
9.3
S3_AL_MIN
200 (2900) barg (psig)
0
-50
0
-60
240
S4_AL_MAX
s
°C/°F
105
S4_AL_MIN
200 (392)
°C (°F)
0
0
240
s
Note: this is a likely event, as during the timeout, the protection
function will have an effect.
If the timeout relating to the control alarms is set to 0 s, the alarm is
disabled. The protectors are still active, however. The alarms are reset
automatically.
Low suction temperature alarm
UOM
The low suction temperature alarm is not linked to any protection
function. It features a threshold and a timeout, and is useful in the event
of probe or valve malfunctions to protect the compressor using the relay
to control the solenoid valve or to simply signal a possible risk. In fact,
the incorrect measurement of the evaporation pressure or incorrect
configuration of the type of refrigerant may mean the superheat
calculated is much higher than the actual value, causing an incorrect and
excessive opening of the valve. A low suction temperature measurement
may in this case indicate the probable flooding of the compressor, with
corresponding alarm signal. If the alarm timeout is set to 0 s, the alarm is
disabled. The alarm is reset automatically, with a fixed differential of 3°C
above the activation threshold.
Relay activation for control alarms
As mentioned in the paragraph on the configuration of the relay, in the
event of LowSH, MOP, High Tcond and low suction temperature alarms,
the driver relay will open both when configured as an alarm relay and
configured as a solenoid + alarm relay. In the event of LOP alarms, the
driver relay will only open if configured as an alarm relay.
Tab. 9.d
The behaviour of the driver in response to probe alarms can be configured,
using the manufacturer parameters. The options are:
• no action (control continues but the correct measurement of the
variables is not guaranteed);
• forced closing of the valve (control stopped);
• valve forced to the initial position (control stopped);
• use the backup probe (valid only for probe S1 and S2 alarms, control
continues).
Parameter/description
CONFIGURATION
S1 probe alarm manag.:
1=No action
2=Valve forced closed
3=Valve at fixed position
4=Use backup probe S3
S2 probe alarm manag.:
1=No action
2=Valve forced closed
3=Valve at fixed position
4=Use backup probe S4
S3 probe alarm manag.:
1=No action
2=Valve forced closed
3=Valve at fixed position
S4 probe alarm manag.:
1=No action
2=Valve forced closed
3=Valve at fixed position
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Tab. 9.e
Important: in applications that use programmable control it may
be necessary to exclude the alarms generated by the probes:
Parameter/description
PROBES
Enable S1
Enable S2
Enable S3
Enable S4
Def.
Parameter/description
CONTROL
LowSH protection threshold
Def.
Min.
5
LowSH protection integration time
LOP protection threshold
15
-50
LOP protection integration time
MOP protection threshold
0
50
-40 (-72) superheat
set point
0
800
-60 (-76) MOP threshold
0
800
LOP th- 200 (392)
reshold.
0
800
s
-60 (-76) 200 (392)
0
800
°C (°F)
s
0
18000
s
0
18000
s
0
18000
s
0
18000
s
MOP protection integration time
20
ADVANCED
High Tcond threshold
80
High Tcond integration time
20
ALARM CONFIGURATION
Low superheat alarm timeout
300
(LowSH)
(0= alarm DISABLED)
Low evaporation temperature alarm 300
timeout (LOP)
(0= alarm DISABLED)
High evaporation temperature alarm 600
timeout (MOP)
(0= alarm DISABLED)
High condensing temperature alarm 600
timeout (High Tcond)
(0= alarm DISABLED)
Low suction temperature alarm
-50
threshold
Low suction temperature alarm
300
timeout
Def.
Valve at fixed position
Valve at fixed position
No action
No action
48
Max.
UOM
K (°F)
s
°C (°F)
s
°C (°F)
-60 (-76) 200 (392)
°C (°F)
0
s
18000
ENG
9.5 EEV motor alarm
At the end of the commissioning procedure and whenever the driver is
powered up, the valve motor error recognition procedure is activated.
This preceded the forced closing procedure and lasts around 10 s.
The valve is kept stationary to allow any valve motor faults or missing
or incorrect connections to be detected. In any of these cases, the
corresponding alarm is activated, with automatic reset. The driver will go
into wait status, as it can longer control the valve. The procedure can be
avoided by keeping the respective digital input closed for each driver. In
this case, after having powered up the driver, forced closing of the valve
is performed immediately.
Important: after having resolved the problem with the motor,
it is recommended to switch the driver off and on again to realign the
position of the valve. If this is not possible, the automatic procedure for
synchronising the position may help solve the problem, nonetheless
correct regulation will not be guaranteed until the next synchronisation.
9.6 LAN error alarm
Note: in the event of LAN error, a parameter can be set to disable
“Manual positioning”.
If the connection to the LAN network is offline for more than 6s due to an
electrical problem, the incorrect configuration of the network addresses
or the malfunction of the pCO controller, a LAN error alarm will be
signalled.
The error affects the control of the driver as follows:
• case 1: unit in standby, digital input DI1/DI2 disconnected; the driver will
remain permanently in standby and control will not be able to start;
• case 2: unit in control, digital input DI1/DI2 disconnected: the driver
will stop control and will go permanently into standby;
• case 3: unit in standby, digital input DI1/DI2 connected: the driver will
remain in standby, however control will be able to start if the digital input
is closed. In this case, it will start with “current cooling capacity”= 100%;
• case 4: unit in control, digital input DI1/DI2 connected: the driver will
remain in control status, maintaining the value of the “current cooling
capacity”. If the digital input opens, the driver will go to standby and
control will be able to start again when the input closes. In this case, it
will start with “current cooling capacity”= 100%
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10. TROUBLESHOOTING
The following table lists a series of possible malfunctions that may occur
when starting and operating the driver and the electronic valve. These
cover the most common problems and are provided with the aim of
offering an initial response for resolving the problem.
PROBLEM
CAUSE
SOLUTION
The superheat value measu- The probe does not measure correct values Check that the pressure and the temperature measured are correct and that the probe
red is incorrect
position is correct. Check that the minimum and maximum pressure parameters for the
pressure transducer set on the driver correspond to the range of the pressure probe
installed. Check the correct probe electrical connections.
The type of refrigerant set is incorrect
Check and correct the type of refrigerant parameter.
Liquid returns to the com- The type of valve set is incorrect
Check and correct the type of valve parameter.
The valve is connected incorrectly (rotates Check the movement of the valve by placing it in manual control and closing or opepressor during control
in reverse) and is open
ning it completely. One complete opening must bring a decrease in the superheat and
vice-versa. If the movement is reversed, check the electrical connections.
The superheat set point is too low
Increase the superheat set point. Initially set it to 12 °C and check that there is no
longer return of liquid. Then gradually reduce the set point, always making sure there is
no return of liquid.
Low superheat protection ineffective
If the superheat remains low for too long with the valve that is slow to close, increase
the low superheat threshold and/or decrease the low superheat integration time.
Initially set the threshold 3 °C below the superheat set point, with an integration time
of 3-4 seconds. Then gradually lower the low superheat threshold and increase the low
superheat integration time, checking that there is no return of liquid in any operating
conditions.
Stator broken or connected incorrectly
Disconnect the stator from the valve and the cable and measure the resistance of the
windings using an ordinary tester.
The resistance of both should be around 36 ohms. Otherwise replace the stator. Finally,
check the electrical connections of the cable to the driver.
Valve stuck open
Check if the superheating is always low (<2 °C) with the valve position permanently at
0 steps. If so, set the valve to manual control and close it completely. If the superheat is
always low, check the electrical connections and/or replace the valve.
The “valve opening at start-up” parameter Decrease the value of the “Valve opening at start-up” parameter on all the utilities,
is too high on many cabinets in which
making sure that there are no repercussions on the control temperature.
the control set point is often reached (for
multiplexed cabinets only)
Liquid returns to the com- The pause in control after defrosting is too Increase the value of the “valve control delay after defrosting” parameter.
pressor only after defrosting short
The superheat temperature measured
Check that the LowSH threshold is greater than the superheat value measured and that
(for multiplexed cabinets
by the driver after defrosting and before
the corresponding protection is activated (integration time >0 s). If necessary, decrease
only)
reaching operating conditions is very low the value of the integration time.
for a few minutes
The superheat temperature measured by Set more reactive parameters to bring forward the closing of the valve: increase the
the driver does not reach low values, but
proportional factor to 30, increase the integration time to 250 s and increase the derivathere is still return of liquid to the compres- tive time to 10 sec.
sor rack
Many cabinets defrosting at the same time Stagger the start defrost times. If this is not possible, if the conditions in the previous
two points are not present, increase the superheat set point and the LowSH thresholds
by at least 2 °C on the cabinets involved.
The valve is significantly oversized
Replace the valve with a smaller equivalent.
Liquid returns to the com- The “valve opening at start-up” parameter is Check the calculation in reference to the ratio between the rated cooling capacity of
pressor only when starting set too high
the evaporator and the capacity of the valve; if necessary, lower the value.
the controller (after being
OFF)
The superheat value swings The condensing pressure swings
Check the controller condenser settings, giving the parameters “blander” values (e.g.
around the set point with an
increase the proportional band or increase the integration time). Note: the required
amplitude greater than 4°C
stability involves a variation within +/- 0.5 bars. If this is not effective or the settings
cannot be changed, adopt electronic valve control parameters for perturbed systems
The superheat swings even with the valve Check for the causes of the swings (e.g. low refrigerant charge) and resolve where posset in manual control (in the position cor- sible. If not possible, adopt electronic valve control parameters for perturbed systems.
responding to the average of the working
values)
The superheat does NOT swing with the
As a first approach , decrease (by 30 to 50 %) the proportional factor. Subsequently try
valve set in manual control (in the position increasing the integration time by the same percentage. In any case, adopt parameter
corresponding to the average of the wor- settings recommended for stable systems.
king values)
The superheat set point is too low
Increase the superheat set point and check that the swings are reduced or disappear.
Initially set 13 °C, then gradually reduce the set point, making sure the system does not
start swinging again and that the unit temperature reaches the control set point.
In the start-up phase with
MOP protection disabled or ineffective
Activate the MOP protection by setting the threshold to the required saturated evahigh evaporator tempeporation temperature (high evaporation temperature limit for the compressors) and
ratures, the evaporation
setting the MOP integration time to a value above 0 (recommended 4 seconds). To
pressure is high
make the protection more reactive, decrease the MOP integration time.
Refrigerant charge excessive for the system Apply a “soft start” technique, activating the utilities one at a time or in small groups. If
or extreme transitory conditions at start-up this is not possible, decrease the values of the MOP thresholds on all the utilities.
(for cabinets only).
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ENG
PROBLEM
In the start-up phase the
low pressure protection
is activated (only for selfcontained units)
CAUSE
The “Valve opening at start-up” parameter
is set too low
The driver in pLAN or tLAN configuration does not start control and the valve
remains closed
The driver in stand-alone configuration
does not start control and the valve
remains closed
LOP protection disabled
LOP protection ineffective
Solenoid blocked
Insufficient refrigerant
The valve is connected incorrectly (rotates
in reverse) and is open
Stator broken or connected incorrectly
Valve stuck closed
The unit switches off due to LOP protection disabled
low pressure during control LOP protection ineffective
(only for self-contained
units)
Solenoid blocked
Insufficient refrigerant
The valve is significantly undersized
Stator broken or connected incorrectly
Valve stuck closed
The cabinet does not reach Solenoid blocked
the set temperature, despite
the value being opened to Insufficient refrigerant
the maximum (for multiplexed cabinets only)
The valve is significantly undersized
Stator broken or connected incorrectly
Valve stuck closed
The cabinet does not reach
the set temperature, and
the position of the valve is
always 0 (for multiplexed
cabinets only)
The driver in pLAN or tLAN configuration does not start control and the valve
remains closed
The driver in stand-alone configuration
does not start control and the valve
remains closed
SOLUTION
Check the calculation in reference to the ratio between the rated cooling capacity of
the evaporator and the capacity of the valve; if necessary increase the value.
Check the pLAN / tLAN connections. Check that the pCO application connected to the
driver (where featured) correctly manages the driver start signal. Check that the driver is
NOT in stand-alone mode.
Check the connection of the digital input. Check that when the control signal is sent
that the input is closed correctly. Check that the driver is in stand-alone mode.
Set a LOP integration time greater than 0 s.
Make sure that the LOP protection threshold is at the required saturated evaporation
temperature (between the rated evaporation temperature of the unit and the corresponding temperature at the calibration of the low pressure switch) and decrease the
value of the LOP integration time.
Check that the solenoid opens correctly, check the electrical connections and the
operation of the relay.
Check that there are no bubbles in the sight glass upstream of the expansion valve.
Check that the subcooling is suitable (greater than 5 °C); otherwise charge the circuit.
Check the movement of the valve by placing it in manual control and closing or opening it completely. One complete opening must bring a decrease in the superheat and
vice-versa. If the movement is reversed, check the electrical connections.
Disconnect the stator from the valve and the cable and measure the resistance of the
windings using an ordinary tester.
The resistance of both should be around 36 ohms. Otherwise replace the stator. Finally,
check the electrical connections of the cable to the driver (see paragraph 5.1).
Use manual control after start-up to completely open the valve. If the superheat
remains high, check the electrical connections and/or replace the valve.
Set a LOP integration time greater than 0 s.
Make sure that the LOP protection threshold is at the required saturated evaporation
temperature (between the rated evaporation temperature of the unit and the corresponding temperature at the calibration of the low pressure switch) and decrease the
value of the LOP integration time.
Check that the solenoid opens correctly, check the electrical connections and the
operation of the control relay.
Check that there are no bubbles of air in the liquid indicator upstream of the expansion
valve. Check that the subcooling is suitable (greater than 5 °C); otherwise charge the
circuit.
Replace the valve with a larger equivalent.
Disconnect the stator from the valve and the cable and measure the resistance of the
windings using an ordinary tester.
The resistance of both should be around 36 ohms. Otherwise replace the stator. Finally,
check the electrical connections of the cable to the driver.
Use manual control after start-up to completely open the valve. If the superheat
remains high, check the electrical connections and/or replace the valve.
Check that the solenoid opens correctly, check the electrical connections and the
operation of the relay.
Check that there are no bubbles of air in the liquid indicator upstream of the expansion
valve. Check that the subcooling is suitable (greater than 5 °C); otherwise charge the
circuit.
Replace the valve with a larger equivalent.
Disconnect the stator from the valve and the cable and measure the resistance of the
windings using an ordinary tester.
The resistance of both should be around 36 ohms. Otherwise replace the stator. Finally,
check the electrical connections of the cable to the driver.
Use manual control after start-up to completely open the valve. If the superheat
remains high, check the electrical connections and/or replace the valve.
Check the pLAN/tLAN connections. Check that the pCO application connected to the
driver (where featured) correctly manages the driver start signal. Check that the driver is
NOT in stand-alone mode.
Check the connection of the digital input. Check that when the control signal is sent
that the input is closed correctly. Check that the driver is in stand-alone mode.
Tab. 10.a
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11. TECHNICAL SPECIFICATIONS
Power supply
(Lmax= 5 m)
Power input
• 24 Vac (+10/-15%) to be protected by external 2 A type T fuse.
• 24 Vdc (+10/-15%) to be protected by external 2 A type T fuse. Use a dedicated class 2 transformer (max 100 VA).
• 16.2 W with ALCO EX7/EX8 valves, 9.2 W with all other valves
• 35 VA with EVBAT00400; 35 VA with ALCO EX7/EX8 valves; 20 VA without EVBAT00400 and with all other valves
22 Vdc+/-5%. (If the optional EVBAT00200/300 module is installed), Lmax= 5 m
Emergency power supply
Insulation between relay output and other reinforced; 6 mm in air, 8 mm on surface; 3750 V insulation
outputs
Motor connection
4-wire shielded cable i.e. CAREL code E2VCABS*00, or 4-wire shielded cable AWG 22 Lmax= 10 m; or 4-wire shielded
cable AWG 14 Lmax= 50 m
Digital input to be activated from voltage-free contact or transistor to GND. Closing current 5 mA; Lmax= 30 m
Digital input connection
Probes (Lmax=10 m;
S1
ratiometric pressure probe (0 to 5 V):
less than 30 m with
• resolution 0.1 % FS; • measurement error: 2% FS maximum; 1% typical
electronic pressure probe (4 to 20 mA):
shielded cable)
• resolution 0.5 % FS; • measurement error: 8% FS maximum; 7% typical
remote electronic pressure probe(4 to 20 mA), maximum number of drivers connected= 5:
• resolution 0.1 % FS; • measurement error: 2 % FS maximum; 1 % typical
4 to 20 mA input (max 24 mA):
• resolution 0.5 % FS; • measurement error: 8% FS maximum; 7% typical
0 to 5 V input:
• resolution 0.1 % FS; • measurement error: 2% FS maximum; 1% typical
S2
low temperature NTC:
• 10kΩ at 25°C, -50T90 °C; • measurement error: 1°C in the range -50T50°C; 3 °C in the range +50T90 °C
high temperature NTC:
• 50kΩ at 25°C, -40T150 °C; • measurement error: 1.5 °C in the range -20T115°C, 4 °C in the range outside of -20T115 °C
NTC built-in:
• 10kΩ at 25 °C, -40T120 °C; • measurement error: 1 °C in the range -40T50°C; 3 °C in the range +50T90 °C
0 to 10 V input (max 12 V):
• resolution 0.1 % FS; • measurement error: 9% FS maximum; 8% typical
S3
ratiometric pressure probe (0 to 5 V):
• resolution 0.1 % FS; • measurement error: 2% FS maximum; 1% typical
electronic pressure probe (4 to 20 mA):
• resolution 0.5 % FS; • measurement error: 8% FS maximum; 7% typical
electronic pressure probe (4 to 20 mA) remote. Maximum number of controllers connected=5
combined ratiometric pressure probe (0 to 5 V):
• resolution 0.1 % FS • measurement error: 2 % FS maximum; 1 % typical
0 to 5 V input:
• resolution 0.1 % FS; • measurement error: 2% FS maximum; 1% typical
S4
low temperature NTC:
• 10kΩ at 25°C, -50T105 °C; • measurement error: 1 °C in the range -50T50 °C; 3°C in the range 50T90°C
high temperature NTC:
• 50kΩ at 25 °C, -40T150 °C; • measurement error: 1.5 °C in the range -20T115 °C 4 °C in the range outside of -20T115 °C
NTC built-in:
• 10kΩ at 25 °C, -40T120 °C; • measurement error 1 °C in the range -40T50 °C; 3 °C in the range +50T90 °C
Relay output
normally open contact; 5 A, 250 Vac resistive load; 2 A, 250 Vac inductive load (PF=0 .4); Lmax=10 m; VDE: 1(1)A PF=0.6
programmable output: +5 Vdc+/-2% or 12 Vdc+/-10%
Power to active probes (VREF)
Lmax=1000 m, shielded cable
RS485 serial connection
Lmax=30 m, shielded cable
tLAN connection
Lmax=500 m, shielded cable
pLAN connection
DIN rail
Assembly
plug-in, cable size 0.5 to 2.5 mm2 (12 to 20 AWG)
Connectors
LxHxW= 70x110x60
Dimensions
Operating conditions
-25T60°C (don’t use EVDIS* under -20°C); <90% RH non-condensing
Storage conditions
-35T60°C (don’t store EVDIS* under -30°C), humidity 90% RH non-condensing
IP20
Index of protector
2 (normal)
Environmental pollution
Category D
Resistance to heat and fire
Immunity against voltage surges
Category 1
Rated impulse voltage
2500V
1C microswitching
Type of relay action
Class of insulation
II
A
Software class and structure
Conformity
Electrical safety: EN 60730-1, EN 61010-1, VDE 0631-1
Electromagnetic compatibility: EN 61000-6-1, EN 61000-6-2, EN 61000-6-3, EN 61000-6-4; EN61000-3-2, EN55014-1,
EN55014-2, EN61000-3-3.
Tab. 11.a
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52
ENG
12. APPENDIX: VPM (VISUAL PARAMETER MANAGER)
12.1 Installation
On the http://ksa.carel.com website, under the Parametric Controller
Software section, select Visual Parameter Manager.
A window opens, allowing 3 files to be downloaded:
1. VPM_CD.zip: for burning to a CD;
2. Upgrade setup;
3. Full setup: the complete program.
For first installations, select Full setup, for upgrades select Upgrade setup.
The program is installed automatically, by running setup.exe.
Note: if deciding to perform the complete installation (Full setup),
first uninstall any previous versions of VPM.
12.2 Programming (VPM)
When opening the program, the user needs to choose the device being
configured: EVD evolution. The Home page then opens, with the choice
to create a new project or open an existing project. Choose new project
and enter the password, which when accessed the first time can be set
by the user.
Fig. 12.c
5. select the model from the range and create a new project or choose an
existing project: select “Device model”.
A new project can be created, making the changes and then connecting
later on to transfer the configuration (OFFLINE mode). Enter at the Service
or Manufacturer level.
• select Device model and enter the corresponding code
Fig. 12.d
Fig. 12.a
• go to Configure device: the list of parameters will be displayed,
Then the user can choose to:
4. directly access to the list of parameters for the EVD evolution saved to
EEPROM: select “tLAN”;
allowing the changes relating to the application to be made.
This is done in real time (ONLINE mode), at the top right set the network
address 198 and choose the guided recognition procedure for the USB
communication port. Enter at the Service or Manufacturer level.
Fig. 12.e
At the end of the configuration, to save the project choose the following
command, used to save the configuration as a file with the .hex extension.
File -> Save parameter list.
Fig. 12.b
To transfer the parameters to the driver, choose the “Write” command.
During the write procedure, the 2 LEDs on the converter will flash.
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ENG
Fig. 12.f
Note: the program On-line help can be accessed by pressing F1.
12.3 Copying the setup
On the Configure device page, once the new project has been created, to
transfer the list of configuration parameters to another driver:
• read the list of parameters from the source driver with the “Read”
command;
• remove the connector from the service serial port;
• connect the connector to the service port on the destination driver;
• write the list of parameters to the destination driver with the “Write”
command.
Important: the parameters can only be copied between controllers
with the same code. Different firmware versions may cause compatibility
problems.
12.4 Setting the default parameters
When the program opens:
• select the model from the range and load the associated list of
parameters;
• go to “Configure device”: the list of parameters will be shown, with the
default settings.
• connect the connector to the service serial port on the destination
driver;
• during the write procedure, the LEDs on the converter will flash.
The driver parameters driver will now have the default settings.
12.5 Updating the driver and display firmware
The driver and display firmware must be updated using the VPM program
on a computer and the USB/tLAN converter, which is connected to
the device being programmed (see paragraph 2.5 for the connection
diagram). The firmware can be downloaded from http://ksa.carel.com.
See the VPM On-line help.
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
54
CAREL INDUSTRIES HeadQuarters
Via dell’Industria, 11 - 35020 Brugine - Padova (Italy)
Tel. (+39) 049.9716611 - Fax (+39) 049.9716600
e-mail: [email protected] - www.carel.com
“EVD evolution” +0300005EN - rel. 3.7 - 16.12.2019
Agenzia / Agency:
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