User manual - Hydro-Temp
EVD evolution twin
Driver for 2 electronic expansion valves
User manual
NO POWER
& SIGNAL
CABLES
TOGETHER
READ CAREFULLY IN THE TEXT!
Integrated Control Solutions & Energy Savings
ENG
DISPOSAL
WARNINGS
CAREL INDUSTRIES 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 INDUSTRIES and its
subsidiaries/affiliates 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-the-art 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 INDUSTRIES may, based on specific agreements, acts as a consultant
for the successful 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 INDUSTRIES 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 INDUSTRIES 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 INDUSTRIES
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.
In addition to observing any further warnings described in this manual, the
following warnings must be heeded for all CAREL INDUSTRIES 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 INDUSTRIES product
portfolio.
CAREL INDUSTRIES adopts a policy of continual development. Consequently,
CAREL INDUSTRIES 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.
IMPORTANT: Separate as much as possible the probe and digital input cables
from the cables to inductive loads and power cables to avoid possible
electromagnetic disturbance.
Never run power cables (including the electrical panel cables) and signal
cables in the same conduits
NO POWER
& SIGNAL
CABLES
TOGETHER
The liability of CAREL INDUSTRIES in relation to its products is specified in
the CAREL INDUSTRIES 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
INDUSTRIES, its employees or subsidiaries/affiliates 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 INDUSTRIES or its subsidiaries are warned of the
possibility of such damage.
READ CAREFULLY IN THE TEXT!
3
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
ENG
Contents
1. INTRODUCTION
7
9.4 Control alarms ..................................................................................................50
9.5 EEV motor alarm .............................................................................................50
9.6 LAN error alarm ...............................................................................................50
1.1 Models ....................................................................................................................7
1.2 Main functions and features.......................................................................7
2. INSTALLATION
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 .........10
2.6 Shared pressure probe................................................................................11
2.7 Connecting the USB-tLAN converter ................................................11
2.8 Connecting the USB/RS485 converter..............................................12
2.9 Upload, Download and Reset parameters (display) .................12
2.10 Display electrical connections (display) ...........................................12
2.11 General connection diagram..................................................................13
3. USER INTERFACE
3.1
3.2
3.3
3.4
3.5
53
12. APPENDIX: VPM (VISUAL PARAMETER MANAGER)
54
12.1 Installation .........................................................................................................54
12.2 Programming (VPM).....................................................................................54
12.3 Copying the setup ........................................................................................55
12.4 Setting the default parameters .............................................................55
12.5 Updating the controller and display firmware ............................55
14
17
20
Main control ......................................................................................................20
Superheat control ..........................................................................................20
Adaptive control and autotuning ........................................................22
Control with Emerson Climate Digital Scroll ™ compressor 23
Special control .................................................................................................24
6. FUNCTIONS
6.1
6.2
6.3
6.4
6.5
11. TECHNICAL SPECIFICATIONS
Commissioning ...............................................................................................17
Guided commissioning procedure (display).................................17
Checks after commissioning ...................................................................19
Other functions ...............................................................................................19
5. CONTROL
5.1
5.2
5.3
5.4
5.5
51
Assembling the display board (accessory) .........................................14
Display and keypad.......................................................................................14
Switching between drivers (display) ..................................................15
Display mode (display)................................................................................15
Programming mode (display) ...............................................................15
4. COMMISSIONING
4.1
4.2
4.3
4.4
10. TROUBLESHOOTING
28
Power supply mode .....................................................................................28
Network connection ....................................................................................28
Inputs and outputs .......................................................................................28
Control status ..................................................................................................30
Special control status...................................................................................31
7. PROTECTORS
33
7.1 Protectors ............................................................................................................33
8. TABLE OF PARAMETERS
8.1
8.2
8.3
8.4
8.5
8.6
35
Table of parameters, driver A ..................................................................35
Table of parameters, driver B...................................................................40
Unit of measure ...............................................................................................44
Variables accessible via serial – driver A ...........................................45
Variables accessible via serial – driver B ...........................................46
Variables used based on the type of control ................................47
9. ALARMS
48
9.1 Alarms ...................................................................................................................48
9.2 Alarm relay configuration .........................................................................49
9.3 Probe alarms......................................................................................................49
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“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
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1. INTRODUCTION
1.2 Main functions and features
EVD evolution twin is a controller featuring two drivers for double pole
stepper motors that independently manages two electronic expansion
valves. It is designed for DIN rail assembly and is fitted with plug-in screw
terminals. Each driver 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), and low evaporation pressure (LOP) protection, and can
manage, as an alternative to superheat control, special functions such as
the hot gas bypass, evaporator pressure regulation (EPR) and control of the
valve downstream of the gas cooler in transcritical CO2 circuits. The controller
can drive 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.
As regards network connectivity, the controller 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 for driver A and via digital input 2 for driver
B, if suitably configured. As well as regulation start/stop, digital inputs 1 and
2 can be configured for the following:
• valve regulation optimization after defrost;
• discharged battery alarm management;
• valve forced open (at 100%);
• regulation backup;
• regulation security.
• The last two possibilities refer to the behaviour of the driver when there is
no communication over the pLAN or tLAN, RS485/Modbus® network (see
chap. 6).
Another possibility involves operation as a simple positioner with 4 to 20 mA
or 0 to 10 Vdc analogue input signal for driver A (inputs S1 and S2 respectively)
and with 4 to 20 mA signal for driver B (input S3). EVD evolution twin 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 for each driver:
refrigerant, valve, pressure sensor, type of main control (chiller, showcase, etc.).
The procedure can also be used to check that the sensor 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 controller, or alternatively kept
in place to display the significant system variables, any alarms and when
necessary set the control parameters. The controller 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 installation be managed as described above by
computer, using the serial port (see paragraph 2.6) in place of the service serial
port. The “universal” models can drive all types of valves, while the “CAREL”
models only drive CAREL valves.
In summary:
• electrical connections by plug-in screw terminals;
• serial card incorporated in the controller, 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 for driver A and digital
input 2 for driver B, if suitably configured, or remote control via LAN, from
pCO programmable controller;
• superheat control with protection functions for low superheat LowSH,
MOP, LOP;
• adaptive superheat control;
• function to optimise superheat control for air-conditioning units fitted
with Emerson Climate Digital Scroll compressor. In this case, EVD Evolution
twin must be connected to a CAREL pCO series controllers 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 EVD evolution twin controller
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 (maximum 2 EVD evolution twins + 1 EVD
Evolution), useful for multiplexed applications;
• 4 to 20 mA or 0 to 10 Vdc input to use the controller as a positioner
controlled by an external signal;
• management of power failures with valve closing (only for controllers with
24 Vac power supply connected to EVBAT00400/EVBAT00500 accessory);
• advanced alarm management.
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.
1.1 Models
Code
EVD0000T00
EVD0000T01
EVD0000T10
EVD0000T11
EVD0000T20
EVD0000T21
Description
EVD evolution twin universal (tLAN)
EVD evolution twin universal (tLAN) pack of 10 pcs. (*)
EVD evolution twin universal (pLAN)
EVD evolution twin universal (pLAN) pack of 10 pcs. (*)
EVD evolution twin universal (RS485/Modbus®)
EVD evolution twin universal (RS485/Modbus®) pack of 10
pcs. (*)
EVD0000T30 EVD evolution twin for Carel valves (tLAN)
EVD0000T31 EVD evolution twin for Carel valves (tLAN) pack of 10 pcs. (*)
EVD0000T40 EVD evolution twin for Carel valves (pLAN)
EVD0000T41 EVD evolution twin for Carel valves (pLAN) pack of 10 pcs. (*)
EVD0000T50 EVD evolution twin for Carel valves (RS485/Modbus®)
EVD0000T51 EVD evolution twin for Carel valves (RS485/Modbus®) pack
of 10 pcs. (*)
EVDCON0021 EVD Evolution, connector kit (10pcs) for multi-pack(*)
Tab. 1.a
(*)The codes with multiple packages are sold without connectors, available
separately in code EVDCON0021.
7
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
ENG
Series of accessories for EVD evolution twin
Battery module (code EVBAT00400)
Display (code EVDIS00**0)
The EVBAT00400 module is an electronic device made by CAREL which
guarantees temporary power supply to the EVD0000T* driver (only one
controller can be connected), in the event of a sudden power failure. It signals
the battery discharged or faulty status via an open collector output, which can
be used by the pCO to generate an alarm message and notify the technical
service for preventive maintenance. Powered by a 12 V lead backup battery,
it supplies 12 Vdc to the controller for the time required to completely close
the electronic valve being controlled, while during normal operation ensures
the battery is correctly recharged. The battery (code EVBAT00500) and the box
(code EVBATBOX*0) can be purchased separately.
Easily applicable and removable at any time from the front panel of the
controller, during normal operation displays all the significant variables for
system A and B, the status of the relay outputs and recognises the activation
of the protection functions and alarms. During commissioning, it guides the
installer in setting the parameters required to start the installations and, once
completed, can copy the parameters to other EVD evolution twin controllers.
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 for both drivers, accessible via password at a service
(installer) and manufacturer level.
Fig. 1.a
EBVAT00400
USB/tLAN converter (code EVDCNV00E0)
EVBAT00500
Fig. 1.d
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 twin directly to a computer, which,
using the VPM program, can configure and program the controller. VPM can
also be used to update the controller and display firmware. See the appendix.
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.b
USB/RS485 converter (code CVSTDUMOR0)
The converter is used to connect the configuration computer and the EVD
evolution twin controllers, for RS485/Modbus ® models only.
Fig. 1.e
Fig. 1.c
Important: the EVBAT00400 battery module can only be used with 24
Vac power supply.
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
8
ENG
2. INSTALLATION
2.1 DIN rail assembly and dimensions
2.3 Connection diagram - superheat control
3
2
4
E X V connection
EVD
CAREL EXV
VALVE B
CAREL EXV
VALVE A
NO 1
1
Power Supply
COM 1
G
G0
VBAT
EVD evolution twin è fornito con connettori serigrafati per facilitare i
collegamenti elettrici. Gli schermi dei due cavi valvola vanno collegati all’unico
terminale tipo fast-on.
Relay
14
4
1
2
3
evolution
15
S
A
shield
45
shield
NOA
1 3 2 4
GND
EVD
Tx/Rx
230 Vac
70
49
60
OPEN A
2 AT
35 VA
TRADRFE240
Fig. 2.a
NET
evolution
24 Vac
G
G0
DI2
Network
DI1
S4
S3
S2
S1
V REF
GND
Analog – Digital Input
1 3 2 4
COMA
G
G0
VBAT
twin
NOB
13
COMB
110
16
S
B
OPEN B
17
18
CLOSE A CLOSE B
twin
A
B
5
S4
2.2 Description of the terminals
DI1
DI2
GND
VREF
S1
S2
S3
Analog - Digital Input
Network
GND
Tx/Rx
EVDCNV00E0
1
3
2
4
X
E V connection B
EVD
NO A
4
COM A
2
4
PC
EEV driver
11
6
Relay A
7
NO B
3
E X V connection A
COM B
VBAT
G0
G
EVD4
EVD4 service USB adapter
1
Power Supply
8 9 10
12
Relay B
evolution
Fig. 2.c
aa
Key:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
twin
Network
DI2
DI1
S4
S3
S2
S1
V REF
GND
Analog – Digital Input
GND
Tx/Rx
b
Fig. 2.b
Terminal
G,G0
VBAT
Description
Power supply
Emergency power supply
Functional earth
1,3,2,4: ExV
connection A
COM A, NO A
1,3,2,4: ExV
connection B
COM B, NO B
GND
VREF
S1
S2
S3
S4
DI1
DI2
Stepper motor power supply driver A
aa
b
Alarm relay driver A
Stepper motor power supply driver B
green
yellow
brown
white
personal computer for configuration
USB/tLAN converter
ratiometric pressure transducer–evaporation pressure driver A
NTC – suction temperature driver A
ratiometric pressure transducer–evaporation pressure driver B
NTC – suction temperature driver B
digital input 1 configured to enable control driver A
digital input 2 configured to enable control driver B
voltage-free contact driver A (up to 230 V)
solenoid valve A
alarm signal A
voltage-free contact driver B (up to 230 V)
solenoid valve B
alarm signal B
Note:
•
•
Alarm relay driver B
Signal ground
Power supply to active probes
Probe 1 (pressure) or 4 to 20mA external signal
Probe 2 (temperature) or 0 to 10 V external signal
Probe 3 (pressure) or 4 to 20mA external signal
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 for access)
serial port
connect the shield of the two valve cables to the same spade connector;
the use of driver A for 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 to enable control. As an
alternative to digital input 1, control can be enabled via remote signal
(tLAN, pLAN, RS485). For the positioning of the probes relating to other
applications, see the chapter on “Control”;
Tab. 2.b
9
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ENG
•
•
);
2. connect any digital inputs, maximum length 30 m;
3. connect the power cable to the valve motors: use 4-wire shielded cable
5.
6.
7.
AWG 22 Lmax=10 m or AWG 14 Lmax=50m; failure to connect the valve
motors after connecting the controller will generate the “EEV motor error”
alarm: see paragraph 9.5;
carefully evaluate the maximum capacity of the relay outputs specified in
the chapter “Technical specifications”;
if necessary, use a class 2 safety transformer with suitable short-circuit
and overload protection. For the power ratings of the transformer see the
general connection diagram and the technical specifications;
the connection cables must have a minimum cross-section of 0.5 mm2;
power up the controller: for 24 Vdc power supply the controller will close
the valves;
Case 1: multiple controllers connected in a network powered by the same
transformer. Typical application for a series of controllers inside the same
electrical panel
230 Vac
24 Vac
1
3
2
4
COMA
NOA
G
G0
VBAT
1
3
2
4
COMA
NOA
1
3
2
4
COMA
NOA
G
G0
VBAT
2 AT
G
G0
VBAT
2 AT
pCO
Fig. 2.d
Case 2: multiple controllers connected in a network powered by different
transformers (G0 not connected to earth). Typical application for a series of
controllers in different electrical panels.
1
3
2
4
COMA
NOA
1
3
2
4
COMA
NOA
2 AT
G
G0
VBAT
1
3
2
4
COMA
NOA
G
G0
VBAT
24 Vac
2 AT
2 AT
1
3
2
4
COMA
NOA
G
G0
VBAT
1
3
2
4
COMA
NOA
2 AT
G
G0
VBAT
2 AT
pCO
2.5 Valve operation in parallel and
complementary mode
230 Vac
24 Vac
24 Vac
G
G0
VBAT
230 Vac
230 Vac
24 Vac
2 AT
Important: When connecting the controller, the following warnings
must be observed:
• if the controller is not used as specified in this user manual, the protection
indicated is not guaranteed;
• do not operate the controller for extended periods without connecting
both valves;
• incorrect connection to the power supply may seriously damage the
controller;
• 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 controller 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”.
Important: for 24 Vdc power supply, set “Power supply mode”
parameter=1 to start control. See par. 6.1
2 AT
24 Vac
Important: avoid installing the controller 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 controller to direct sunlight and to the elements in general.
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 controller, or a maximum of 30 metres as long as
shielded cables are used with minimum cross-section of 1 mm² (connect
4.
230 Vac
24 Vac
Fig. 2.f
2.4 Installation
all the shields to the earth spade connector
230 Vac
230 Vac
1
3
2
4
COMA
NOA
•
the use of driver B for superheat control requires the use of the evaporation
pressure probe S3 and the suction temperature probe S4, which will be
fitted after the evaporator, and digital input 2 to enable control. As an
alternative to digital input 2, control can be enabled via remote signal
(tLAN, pLAN, RS485). For the positioning of the probes relating to other
applications, see the chapter on “Control”;
inputs S1, S2, S3 & S4 are programmable and the connection to the
terminals depends on the setting of the parameters. See the chapters on
“Commissioning” and “Functions”;
pressure probes S1 & S2 in the diagram are ratiometric. See the general
connection diagram for the other electronic probes, 4 to 20 mA or
combined;
the pressure probes S1 and S3 must be of the same type.
G
G0
VBAT
•
EVD evolution twin 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.
pCO
Fig. 2.e
Case 3: multiple controllers connected in a network powered by different
transformers with just one earth point. Typical application for a series of
controllers in different electrical panels.
.
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
10
ENG
2 CAREL valves connected in
parallel mode
2 CAREL valves connected in
complementary mode
CAREL EXV
VALVE A_1
2.7 Connecting the USB-tLAN converter
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 controller
CAREL EXV
VALVE B_1
4
2
3
1
4
2
3
1
CAREL EXV
VALVE A_2
press
CAREL EXV
VALVE B_2
EVD evo
lut ion
OPEN
4
2
1
3
4
2
3
1
CLOS
E
press
1 3 2 4
1 3 2 4
4
1
3
2
4
2
4
NET
1
OPEN A
EVD evolution
TWIN
EVDCNV00E0
Model of CAREL valve
NOA
3
NOB
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
1
COMB
G
G0
VBAT
Fig. 2.g
COMA
Fig. 2.i
OPEN B
CLOSE A CLOSE B
A
B
2
DI1
DI2
S4
S2
Analog - Digital Input
3
S3
E7V
NO
S1
E6V
NO
VREF
•
E5V
E4V85 with all refrigerants NO
except for R410A
E4V95 only with R134a
GND
•
4
E4V
OK
EEV driver
E3V
OK
PC
E2V
EVD4
EVD4 service USB adapter
Two EXV
connected
together
Network
GND
Tx/Rx
Tab. 2.c
Fig. 2.j
Key:
2.6 Shared pressure probe
1
2
3
4
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
twin1, twin2 and twin 3 controllers share the same pressure probe, choose the
normal option for driver A on the twin 1 controller and the “remote” option for
the other drivers. Driver B on the twin3 controller must use another pressure
probe, P2.
service serial port
adapter
USB/tLAN converter
personal computer
Note: when using the service serial port connection, the VPM program
can be used to configure the controller and update the controller and display
firmware, downloadable from http://ksa.carel.com. See the appendix.
Example
twin1
twin2
twin3
Probe S1
(driver A)
-0.5 to 7 barg (P1)
remote,
-0.5 to 7 barg
remote,
-0.5 to 7 barg
Probe S3
(driver B)
remote,
-0.5 to 7 barg
remote,
-0.5 to 7 barg
-0.5 to 7 barg (P2)
Tab. 2.d
TWIN 2
P1
DI1
DI2
S4
GND Tx/Rx
GND
VREF
S1
S2
S3
DI1
DI2
S4
GND Tx/Rx
TWIN 3
GND
VREF
S1
S2
S3
DI1
DI2
S4
GND
VREF
S1
S2
S3
TWIN 1
GND Tx/Rx
P2
Fig. 2.h
Key:
P1
P2
shared pressure probe
pressure probe
11
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
ENG
To display the probe and valve electrical connections for drivers A and B, enter
display mode. See paragraph 3.4
3
4
2
4
NOA
1
2
NOB
3
COMB
1
COMA
2.10 Display electrical connections (display)
Only on EVD evolution twin RS485/Modbus® models can the configuration
computer be connected using the USB/RS485 converter and the serial port,
according to the following diagram:
G
G0
VBAT
2.8 Connecting the USB/RS485 converter
NET
OPEN A
OPEN B
EVD evolution CLOSE A
A
TWIN
DI1
DI2
S4
S2
S3
S1
VREF
GND
Analog - Digital Input
CLOSE B
1
B
Network
GND
Tx/Rx
shield
2
Fig. 2.k
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 controller firmware, downloadable from http://ksa.carel.com;
to save time, up to 8 controllers EVD evolution twin can be connected to
the computer, updating the firmware at the same time (each controller
must have a different network address).
2.9 Upload, Download and Reset
parameters (display)
Procedure:
1. press the Help and ENTER buttons together for 5 seconds;
2. a multiple choice menu will be displayed, use UP/DOWN to select the
required procedure;
3. confirm by pressing ENTER;
4. the display will prompt for confirmation, press ENTER;
5. 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
controller;
• DOWNLOAD: the display copies all the values of the parameters to the
target controller;
• RESET: all the parameters on the controller are restored to the default
values.
• See the table of parameters in chapter 8.
JEAD69
9DLCAD69
G:H:I
Fig. 2.l
Important:
•
•
•
•
the procedure must be carried out with controller/controllers powered;
DO NOT remove the display from the controller during the UPLOAD,
DOWNLOAD, RESET procedure;
the parameters cannot be downloaded if the source controller and the
target controller have incompatible firmware;
the parameters cannot be copied from driver A to driver B.
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
12
ENG
2.11 General connection diagram
G
G0
VBAT
X
CAREL E V
VALVE B
CAREL E V
VALVE A
1
A
18
4
1
2
3
EVBAT00500
1
20
21
4
1
3
2
4
COMx
NOx
2
G
G0
VBAT
Sporlan
SEI / SEH
/ SER
X
DANFOSS
ETS
ALCO
EX5/6
EX7/8
1
20
4
21
22
3
4
21
19
S
A
shield
shield
EVD Battery module
17
5
NOA
Analog - Digital Input
15
16
GND
B
pCO
shield
Network
GND Tx/Rx
Tx/Rx
CLOSE B
GND
G
G0
35 VA
TRADRFE240
DI1
DI2
2 AT
S4
24 Vac
S3
230 Vac
B
OPEN B
EVD evolution CLOSE A
A
TWIN
GND
VREF
S1
S2
TRADRFE240
14
S
OPEN A
without battery
35 VA
2 4
NET
G
G0
VBAT
2 AT
COMA
1 3
24 Vac
230 Vac
2 4
NOB
with battery
1 3
COMB
G
G0
VBAT
4 AT
+
GND
BAT ERR
EVBAT00400
pCO
EVDCNV00E0
shield
GND
4
PC
EEV driver
EVD4
EVD4 service USB adapter
7
pCO
Modbus®
12
6
3
DI1
DI2
GND Tx/Rx
9 10 11 13
4
GND
VREF
S1
S2
S3
S4
DI1
DI2
GND Tx/Rx
S4
DI1
DI2
GND Tx/Rx
1
21
DI1
DI2
S4
3
GND
VREF
S1
S2
S3
E
8
4
F
D
S4
GND
VREF
S1
S2
S3
DI1
DI2
GND Tx/Rx
C
GND
VREF
S1
S2
S3
1
21
S4
GND
VREF
S1
S2
S3
shield
B
RS485
EVD0000T0*: tLAN version
EVD0000T3*: tLAN version
EVD0000T1*: pLAN version
EVD0000T4*: pLAN version
EVD0000T2*: RS485 version
EVD0000T5*: RS485 version
23
CVSTDUM0R0
GND Tx/Rx
4
20
Fig. 2.m
Key:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
green
yellow
brown
white
computer for configuration
USB/tLAN converter
adapter
ratiometric pressure transducer driver A
NTC probe driver A
ratiometric pressure transducer driver B
NTC probe driver B
digital input 1 configured to enable control driver A
digital input 2 configured to enable control driver B
voltage-free contact (up to 230 Vac) driver B
solenoid valve driver B
16
17
18
19
20
alarm signal driver B
voltage-free contact (up to 230 Vac) driver A
solenoid valve driver A
alarm signal driver A
red
21
22
23
A
B
C
D
E
F
13
black
blue
computer for configuration/supervision
Connection to EVBAT00400/EVABAT00500
Connection to ratiometric pressure transducer (SPKT00**R0)
Connection to electronic pressure probe (SPK**0000) or piezoresistive
pressure transducer (SPKT00*C00)
Connection as positioner (4 to 20 mA input)
Connection as positioner (0 to 10 Vdc input)
Connection to combined pressure/temperature probe (SPKP00**T0)
The maximum length of the connection cable to the EVBAT00400 module
1 is 5 m.
The connection cable to the valve motor must be 4-wire shielded, AWG 22
2 Lmax= 10 m or AWG14 Lmax= 50 m.
connect all the shields of the probe cables to the earth spade
3
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
ENG
3. USER INTERFACE
Power Supply
3
2
4
E X V connection
EVD
3.2 Display and keypad
The graphic display shows two variables for each driver (A, B), the control
status of the driver, activation of the protectors, any alarms and the status of
the relay output.
NO 1
1
COM 1
G
G0
VBAT
The user interface consists of 8 LEDs that display the operating status, as
shown in the table:
Relay
1
evolution
2
ON
4.9 K A/B
MOP
T
Apertura
valvola
ALARM
Surriscaldam.
44 %
twin
DI2
Network
DI1
S4
S3
S2
S1
V REF
GND
Analog – Digital Input
GND
-- Rele
7
6
5
4
3
8
Fig. 3.c
Tx/Rx
Key:
Fig. 3.a
Key:
LED
Off
No
connection
OPEN A/B Opening valve A/B
CLOSE A/B Closing valve A/B
Active alarm driver A/B A
B
/
Controller powered
Controller off
NET
On
Connection active
1
2
3
4
5
6
7
8
Flashing
Communication error
Driver A/B disabled (*)
Driver A/B disabled (*)
-
variable 1 on the display (driver A/B)
variable 2 on the display (driver A/B)
relay status (driver A/B)
alarm (press “HELP”)
protector activated
control status
current display: driver A/driver B
adaptive control in progress
Messages on the display
Wrong power supply
(see chap. on Alarms)
Tab. 3.a
ON
OFF
Control status
Operation
Standby
LowSH
LOP
POS
Positioning
MOP
WAIT
CLOSE
INIT
Wait
Closing
Valve motor error recognition procedure (*)
Tuning in progress
(*) 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 two drivers. It displays the operating status,
the significant values for the type of control that the drivers are performing
(e.g. superheat control), the alarms, the status of the digital inputs and the
relay outputs. Finally, it can save the configuration parameters for one
controller and transfer them to a second controller (see the procedure for
uploading and downloading the 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 controller is being commissioned, the
guided configuration procedure will start.
TUN
Tab. 3.b
(*) The valve motor error recognition procedure can be disabled. See
paragraph 9.5.
Keypad
Button
Prg
Function
• 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);
• pressed together with ENTER, switches the display from one
driver to the other
Esc
• exits the Programming (Service/Manufacturer) and Display
modes;
• after setting a parameter, exits without saving the changes.
• navigates the screens on the display;
UP/DOWN • increases/decreases the value.
• switches from display to parameter programming mode;
• confirms the value and returns to the list of parameters;
ENTER
• pressed together with HELP, switches the display from one
driver to the other.
Tab. 3.c
press
press
Fig. 3.b
Note: :the variables displayed as standard can be selected by
configuring the parameters “Variable 1 on display” and “Variable 2 on display”
for each driver. See the list of parameters.
Important: the controller 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 controller.
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
Active protection
Low superheat
Low evaporation temperature
High evaporation temperature
14
ENG
3.3 Switching between drivers (display)
3. press ENTER and enter the password for the Service level: 22, starting
Procedure:
press the Help and Enter buttons together. Switching when programming
the parameters displays the parameters for driver A and driver B on the same
screen.
4. if the value entered is correct, the first modifiable parameter is displayed,
CONFIGURATION
PROBE S1
Ratiom., -1/9.3 barg
MAIN CONTROL
display cabinet/
cold room
from the right-most figure and confirming each figure with ENTER;
5.
6.
7.
8.
9.
10.
A
network address;
press UP/DOWN to select the parameter to be set;
press ENTER to move to the value of the parameter;
press UP/DOWN to modify the value;
press ENTER to save the new value of the parameter;
repeat steps 5, 6, 7, 8 to modify the other parameters;
press Esc to exit the procedure for modifying the Service parameters.
E6HHLDG9
%%%&
CONFIGURATION
PROBE S1
RaTiom., -1/9.3 barg
MAIN CONTROL
BACK PRESSURE EPR
B
Fig. 3.f
Important:
•
•
•
Fig. 3.d
Important: the probe S1 parameter is common to both drivers, while the
main control parameter must be set for each driver. See the table of parameters.
Modifying the Manufacturer parameters
The Manufacturer level is used to configure all the controller 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. Select driver A or B to set the corresponding parameters (see paragraph
3.3);
3. press Prg : the display shows a screen with the PASSWORD request;
4. press ENTER and enter the password for the Manufacturer level:
66, starting from the right-most figure and confirming each figure with
ENTER;
5. if the value entered is correct, the list of parameter categories is shown:
- Configuration
- Probes
- Control
- Special
- Alarm configuration
- Valve
6. press the UP/DOWN buttons to select the category and ENTER to access
the first parameter in the category;
7. press UP/DOWN to select the parameter to be set and ENTER to move to
the value of the parameter;
8. press UP/DOWN to modify the value;
9. press ENTER to save the new value of the parameter;
10. repeat steps 7, 8, 9 to modify the other parameters;
11. press Esc to exit the procedure for modifying the Manufacturer parameters
3.4 Display mode (display)
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. Select driver A or B to display the corresponding variables (see paragraph
3.3);
3. 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;
4. press UP/DOWN: the variables are shown on the display followed by the
screens with the probe and valve motor electrical connections;
5. press Esc to exit display mode.
For the complete list of variables used according to the type of control see
paragraph 8.6.
SH=4.9K
211stp
69%
6.4°C
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 use ENTER to move to the left-most digit and press
UP/DOWN.
A/B
3.8barg
1.5°C
CONFIGURAZIONE
SONDE
REGOLAZIONE
SPECIALI
CONFIG.ALLARMI
VALVOLA
Fig. 3.e
3.5 Programming mode (display)
The parameters can be modified using the front keypad. Access differs
according to the user level: Service (Installer) and Manufacturer parameters.
A/B
Fig. 3.g
Modifying the Service parameters
Important:
The Service parameters, as well as the parameters for commissioning the
controller, 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 and select
driver A or B to set the corresponding parameters (see paragraph 3.3);
2. press Prg: the display shows a screen with the PASSWORD request;
•
•
•
all the controller 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.
.
15
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
ENG
4. COMMISSIONING
4.1 Commissioning
4.2 Guided commissioning procedure
(display)
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 controller depend on the type of interface
used, however essentially involve setting just 4 parameters: refrigerant, valve,
type of pressure probe (S1 for driver A and S3 for driver B) and type of main
control. The network address for EVD evolution twin is single.
Types of interfaces:
• DISPLAY: after having correctly configured the setup parameters,
confirmation will be requested. Only after confirmation will the controller
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 closes for driver A and DI2 for driver B.
See paragraph 4.2;
• VPM: to enable control of the drivers 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 drivers 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 controller 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
controllers 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 controller 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 controller 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 closes for driver A
and DI2 for driver B. 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 controller 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. If a pLAN,
tLAN or Modbus® controller 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 Modbus®
address for the controller as required by the application on the pCO, and
after a few seconds communication will commence between the two
instruments and the controller automatically be enabled for control. The
main screen will shown on the display, which can then be removed, and
control will be commence when requested by the pCO controller or digital
input DI1 for driver A and DI2 for driver B. (see paragraph 6.3). If there is no
communication between the pCO and the controller (see the paragraph
“LAN error alarm”), this will be able to continue control based on the status
of the digital inputs.
After having fitted the display:
Configuration
Network address
1/5
A
Configuration
Network address
1/5
A
198
198
 the first parameter is displayed:  press UP/DOWN to modify the
network address;
value
 press Enter to move to the value
of the parameter
Configuration
Network address
1/5
A
Configuration
2/5
REFRIGERANT
1
A
R404A
Valve
Carel ExV
A
green
brown
yellow
white
1
3
2
4
PRESS S1
G
G0
VBAT
TEMP S2
white
black
green
A
COMA
NOA
DI2
GND
TxRx
S3
S4
DI1
 press UP/DOWN to move to the
next parameter, refrigerant for driver
A, indicated by the letter at the top
right;
 repeat steps 2, 3, 4, 5 to modify the values of the parameters for driver A:
refrigerant, valve, pressure probe S1, main control;
GND
VREF
S1
S2
 press Enter to confirm the value
B
green
brown
yellow
white
white
black
green
PRESS S3
1
3
2
4
TEMP S4
B
COMB
NOB
DI2
GND
TxRx
S3
S4
DI1
GND
VREF
S1
S2
 check that the probe electrical  check that the electrical
connections are correct for driver A; connections are correct for valve A;
then set the same parameters for
driver B (see step 6);
 set the values of the parameters for driver B: refrigerant, valve B, pressure
probe S3, main control;
check that the electrical
 check that the probe electrical
connections are correct for driver B; connections are correct for valve B;
Configuration
End configuration?
YES
NO
if the configuration is correct exit
the procedure, otherwise choose
NO and return to step 2.
At the end of the configuration procedure the controller activates the valve
motor error recognition procedure, displaying “INIT” on the display. See
paragraph 9.5. To simplify commissioning and avoid possible malfunctions,
the controller will not start until the following have been configured for each
driver:
1. network address (common parameter);
2. refrigerant;
3. valve;
4. pressure probe;
5. type of main control, that is, the type of unit the superheat control is
applied to.
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
16
ENG
Pressure probes S1 & S3
Note:
•
•
•
Setting the type of pressure probe S1 for driver A and S3 for driver B 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.
to exit the guided commissioning procedure press the DOWN button
repeatedly and finally confirm that configuration has been completed. The
guided procedure CANNOT be ended by pressing Esc;
if the configuration procedure ends with a configuration error, access
Service parameter programming mode and modify the value of the
parameter in question;
if the valve and/or the pressure probe used are not available in the list, select
any model and end the procedure. Then the controller will be enabled for
control, and it will be possible to enter Manufacturer programming mode
and set the corresponding parameters manually. Below are the parameters
for driver A and driver B to be set during the commissioning procedure.
These parameters have the same description for both driver A and driver
B, the user can recognise which parameter is being set by the letter A/B
shown at the top right of the display.
Parameter/description
CONFIGURATION
Probe S1, S3
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
Important: for 24 Vdc power supply, at the end of the guided
commissioning procedure, to start control set “Power supply mode”
parameter=1, otherwise the valves remain in the closed position. See
paragraph 6.1.
The network address assigns to the controller an address for the serial
connection to a supervisory system via RS485, and to a pCO controller via
pLAN, tLAN, Modbus®. This parameter is common to both drivers A and B.
Def.
Min.
Max.
UOM
198
1
207
-
Tab. 4.d
Important: if two pressure probes S1 and S3 are installed, these must
be the same type. A ratiometric probe and an electronic probe cannot be
used together.
Tab. 4.a
Note: in the case of multiplexed systems where the same pressure
probe is shared between the twin1 and twin2 controllers, choose the normal
option for driver A and the “remote” option for the remaining drivers.
Example: to use the same pressure probe P1 for driver A and B: 4 to 20 mA,
-0.5 to 7 barg
For driver A on the twin 1 controller select: 4 to 20 mA, -0.5 to 7 barg.
For driver B on the twin 1 controller and for driver A and B on the twin 2
controller select: remote 4 to 20 mA, -0.5 to 7 barg.
The connection diagram is shown in paragraph 2.6
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 6.1
Refrigerant
The type of refrigerant is essential for calculating the superheat. In addition, it
is used to calculate the evaporation and condensing temperature based on
the reading of the pressure probe.
Parameter/description
CONFIGURATION
Refrigerant
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
Ratiom.:
Electronic (OUT= 4 to 20 mA)
-1 to 9.3
8= -0.5 to 7 barg
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)
21= -1 to 12.8 barg
22= 0 to 20.7 barg
23= 1.86 to 43.0 barg
Network address
Parameter/description
CONFIGURATION
Network address
Def.
Def.
Note:
•
R404A
Tab. 4.b
•
Valve
Setting the type of valve automatically defines all the control parameters based
on the manufacturer’s data for each model. In Manufacturer programming
mode, the control parameters can then be fully customised if the valve used is
not in the standard list. In this case, the controller will detect the modification
and indicate the type of valve as “Customised”.
•
Parameter/description
Def.
CONFIGURATION
Valve:
CAREL
1= CAREL ExV; 2= Alco EX4; 3=Alco EX5; 4=Alco EX6; 5=Alco EX7; EXV
6=Alco EX8 330 Hz recommended CAREL;
7=Alco EX8 500 Hz specific 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 ETS 100B; 17=Danfoss ETS 250; 18=Danfoss ETS 400;
19=Two EXV CAREL connected together; 20=Sporlan SER(I)G,J,K;
21= Danfoss CCM 10-20-30; 22= Danfoss CCM 40
Tab. 4.c
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 controller
will detect the modification and indicate the type of probe S1 or S3 as
“Customised”;
the software on the controller 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 controller automatically updates the limits
of the range of measurement and the alarm limits. By default, the main
control probes S2 and S4 are 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
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.
Important:
•
•
•
two CAREL EXV valves connected together must be selected if two
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.
17
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
ENG
Main control
Setting the main control defines the operating mode for each driver.
Parameter/description
CONFIGURATION
Main control
Superheat control
1= multiplexed showcase/cold room
2= showcase/cold room with compressor on board
3= “perturbed” showcase/cold room
4= showcase/cold room with sub-critical CO2
5= R404A condenser for sub-critical 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
Special control
11= EPR back pressure
12= hot gas bypass by pressure
13= hot gas bypass by temperature
14= transcritical CO2 gas cooler
15= analogue positioner (4 to 20 mA)
16= analogue positioner (0 to 10 V)
17= air-conditioner/chiller or showcase/cold room with
adaptive control
18= air-conditioner/chiller with Digital Scroll compressor
19=AC/chiller with SIAM ANB scroll compressor
(CANNOT BE SELECTED)
20=superheat regulation with 2 temperature probes (CANNOT BE SELECTED)
21=I/O expander for pCO
(*) only for CAREL valves controls
Def.
multiplexed
showcase/
cold room
Tab. 4.e
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/S3
and/or S2/S4 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 controller default parameters are restored (RESET procedure, see the
chapter on Installation), when next started the display will again show the
guided commissioning procedure.
4.3 Checks after commissioning
After commissioning:
• check that the valves complete 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.
4.4 Other functions
By entering Service programming mode, other types of main control can be
selected (transcritical CO2, hot gas bypass, etc.), as well as so-called special
control functions, and suitable values set 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 controller can be completely customised, setting the function of each
parameter. If the parameters corresponding to PID control are modified,
the controller will detect the modification and indicate the main control as
“Customised.
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
18
ENG
5. CONTROL
(*) suction
5.1 Main control
If the superheat temperature is high it means that the evaporation
process is completed well before the end of the evaporator, and therefore
flow-rate 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.
Example of superheat control on two independent circuits A and B.
EVD evolution twin features two types of control, which can be set
independently for driver A and B.
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 two last special functions also relate to superheat
control.
Parameter/Description
CONFIGURATION
Main control
Superheat control
1= multiplexed showcase/cold room
2= showcase/cold room with compressor on board
3= “perturbed” showcase/cold room
4= showcase/cold room with sub-critical CO2
5= R404A condenser for sub-critical 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
Special control
11= EPR back pressure
12= hot gas bypass by pressure
13= hot gas bypass by temperature
14= transcritical CO2 gas cooler
15= analogue positioner (4 to 20 mA)
16= analogue positioner (0 to 10 V)
17= air-conditioner/chiller or showcase/cold room with
adaptive control
18= air-conditioner/chiller with Digital Scroll compressor
19=AC/chiller with SIAM ANB scroll compressor
(CANNOT BE SELECTED)
20=superheat regulation with 2 temperature probes (CANNOT
BE SELECTED)
21=I/O expander for pCO (**)
(*) only for CAREL valve drivers
(**) control only settable on driver A, however corresponds to
the entire controller.
Def.
multiplexed
showcase/
cold room
C1
L1
A
F1
CP1
S1
Tab. 5.f
Note:
M
•
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;
• “perturbed” cabinet/cold room or air-conditioner/chiller refer to units
that momentarily or permanently operate with swinging condensing or
evaporation pressure.
The following paragraphs explain all the types of control that can be set on
EVD evolution twin.
E1
V1
EEVA
PA TA
C2
EVD evolution
twin
S1
S2
S3
S4
L2
5.2 Superheat control
B
F2
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.
CP2
S2
M
E2
V2
EEVB
PB TB
Superheat control
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. EVD Evolution twin can independently manage
superheat control on two refrigerant circuits.
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).
Superheat = Superheated gas temperature(*) – Saturated evaporation
temperature
Fig. 5.a
19
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
ENG
Another possibility involves connecting two equal valves (operation in
parallel mode, see paragraph 2.5) to the same evaporator. This is useful in
reverse-cycle chiller/heat pump applications, to improve distribution of
the refrigerant in the outdoor coil.
Key:
CP1, CP2
C1, C2
L1, L2
F1, F2
S1, S2
EEVA, EEVB
V1, V2
E1, E2
PA, PB
TA,TB
compressor 1.2
condenser 1, 2
liquid receiver 1, 2
dewatering filter 1, 2
liquid indicator 1, 2
electronic expansion valve A,B
solenoid valve 1, 2
evaporator 1, 2
pressure probe
temperature probe
C1
L1
A
F1
CP1
For the wiring, see paragraph 2.11 “General connection diagram”.
S1
M
Another application involves superheat control of two evaporators in the
same circuit.
V1
E1
EEVA_1
PA TA
C
E2
EVD evolution
EEVA_2
S1
S2
S3
S4
twin
L
C2
F
L2
CP
EVD evolution
B
twin
F2
S1
S2
S3
S4
S
CP2
S2
M
M
V
V2
E3
EEVB_1
E1
EEVA
PA TA
PB TB
E4
EEVB_2
E2
EEVB
PB TB
Fig. 5.c
Key:
CP1,2
C1,C2
E1, E2, E3, E4
F1, F2
Fig. 5.b
Key:
CP
C
L
F
S
EEVA,
EEVB
E1, E2
PA, PB
TA,TB
V
compressor
condenser
liquid receiver
dewatering filter
liquid indicator
electronic expansion valve A
electronic expansion valve B
evaporator 1, 2
pressure probe driver A, B
temperature probe driver A, B
solenoid valve
S1, S2
EEVA_1,
EEVA_2
EEVB_1,
EEVB_2
TA, TB
L1, L2
V1, V2
compressor 1, 2
condenser 1, 2
evaporator 1, 2, 3, 4
dewatering filter 1, 2
liquid indicator 1, 2
electronic expansion valves driver A
electronic expansion valves driver B
temperature probe
liquid receiver 1, 2
solenoid valve 1, 2
For the wiring, see paragraph 2.11 “General connection diagram”.
For the wiring, see paragraph 2.11 “General connection diagram”.
PID parameters
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:
Nota: in this example only one electronic pressure transducer with
4 to 20 mA output (SPK**0000) can be used, shared between driver A
and B.
Ratiometric transducers cannot be shared.
1
de(t)
u(t)= K e(t) +T ∫e(t)dt + Td dt
i
Key:
u(t) Valve position
e(t) Error
K
Proportional gain
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
20
Ti
Td
Integral time
Derivative time
ENG
1. use the parameters recommended by CAREL to control the different
Note that control is calculated as the sum of three separate contributions:
proportional, integral and derivative.
• 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 (integral 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 T
(derivative time).
Parameter/Description
CONTROL
Superheat set point
Def.
Min.
Max.
11
180 (324) K(°F)
PID: proportional gain
PID: integral time
PID: derivative time
15
150
5
LowSH: threshold
0
0
0
800
1000
800
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.
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
CONFIGURATION
Main control
Def.
multiplexed showcase/cold
room
...
air-conditioner/chiller or showcase/cold
room with adaptive control
UOM
Tab. 5.i
s
s
Tab. 5.g
The activation status of the tuning procedure will be shown on the standard
display by the letter “T”.
See the “EEV system guide” +030220810 for further information on calibrating
PID control.
Superheating
4.9 K
Note: when selecting the type of main control (both superheat control
Valve opening
A/B ON
T
44 %
and special modes), the PID control values suggested by CAREL will be
automatically set for each application.
-- Relais
Protection function control parameters
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
Def.
Min.
Max.
UOM
5
-40 (-72)
K (°F)
LowSH protection: integral time
LOP protection: threshold
15
-50
0
-60 (-76)
LOP protection: integral time
MOP protection: threshold
0
50
MOP protection: integral time
20
0
LOP: threshold
0
SH set
point
800
MOP:
threshold
800
200 (392)
800
s
Tab. 5.h
Fig. 5.d
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.
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.
s
°C (°F)
s
°C (°F)
Note:
•
•
5.3 Adaptive control and autotuning
EVD evolution TWIN 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: integral time;
- PID: derivative time;
- LowSH: low superheat integral time;
- LOP: low evaporation temperature integral time;
- MOP: high evaporation temperature integral 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:
•
21
during the optimisation phase 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 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.
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
ENG
Autotuning
5.4 Control with Emerson Climate Digital
Scroll ™ compressor
EVD evolution TWIN 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.
Parameter/Description
SPECIAL
Force manual tuning
0 = no; 1= yes
Def.
Min.
Max.
UOM
0
0
1
-
Important: this type of control is incompatible with autotuning.
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 LAN version
driver must be connected to a Carel pCO series controller running a special
application to manage units with Digital scroll compressors.
Tab. 5.j
The activation status of the procedure is indicated on the standard display by
the message “TUN” at the top right.
A/B
Superheating
4.9 K
Parameter/Description
CONFIGURATION
Main control
TUN
Valve opening
44 %
Def.
multiplexed showcase/cold
room
...
air-conditioner/chiller with Digital Scroll
compressor
-- Relais
Tab. 5.l
Fig. 5.e
C
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.
L
Note:
•
•
EVD evolution
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. 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 special control functions
twin
F
CP
S1
S2
S3
S4
•
S
EEVA
M
V
PA TA
E1
EEVB
Def.
Min.
Max.
UOM
0
0
255
Tab. 5.k
GND
pCO
shield
Fig. 5.f
Key:
CP
C
L
F
TA, TB
Tuning method is visible as a parameter in the Special category, the two other
parameters are visible in display mode. See paragraph 3.4.
Compressor
Condenser
Liquid receiver
Dewatering filter
Temperature probes
V
S
EEV
E1, E2
PA, PB
Solenoid valve
Liquid gauge
Electronic expansion valve
Evaporator
Pressure probes
For information on the wiring see paragraph 2.11 “General connection
diagram”.
Note: the “Tuning method” parameter is for use by qualified CAREL
technical personnel only and must not be modified.
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
E2
PB TB
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
Parameter/Description
SPECIAL
Tuning method
GND Tx/Rx
22
ENG
5.5 Special control
Hot gas bypass by pressure
EPR back pressure
This control function can be used to control cooling capacity, which in the
following example is performed by driver B. If there is no request from circuit Y,
the compressor suction pressure decreases and the bypass valve opens to let
a greater quantity of hot gas flow and decrease the capacity of circuit X. Driver
A is used for superheat control on circuit Y.
This type of control can be used in 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
EVB
CP
F
T
V1
V2
twin
E1
S
PA
S1
S2
S3
M
EVD evolution
PB
EVA
EVD evolution
S1
S3
twin
M
T
V1
V2
E
X
M
T
V1
V2
E2
PB
EVB
M
EEVA
Y
Fig. 5.g
E
V1
PA TA
Key:
V1
V2
Solenoid valve
E1, E2
Thermostatic expansion valve EVA,
EVB
PA, Pressure probe driver A, B
PB
Evaporator 1, 2
Electronic valve A, B
Fig. 5.h
Key:
CP
C
L
F
S
For the wiring, see paragraph 2.11 “General connection diagram”.
This involves PID control without any protectors (LowSH, LOP, MOP, see the
chapter on Protectors), without any valve unblock procedure. Control is
performed on the pressure probe value read by input S1 for driver A and S3 for
driver B, 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: proportional gain
PID: integral time
PID: derivative time
Def.
Min.
Max.
UOM
3.5
15
150
5
-20 (-290)
0
0
0
200 (2900)
800
1000
800
barg (psig)
s
s
Tab. 5.m
Compressor
Condenser
Liquid receiver
Dewatering filter
Liquid indicator
V1
V2
EEVA
EVB
E
Solenoid valve
Thermostatic expansion valve
Electronic expansion valve A
Electronic valve B
Evaporator
For the wiring, see paragraph 2.11 “General connection diagram”.
This involves PID control without any protectors (LowSH, LOP, MOP, see the
chapter on Protectors), without any valve unblock procedure. Control is
performed on the hot gas bypass pressure probe value read by input S3,
compared to the set point: “Hot gas bypass pressure set point”. Control is
reverse, as the pressure increases, the valve closes and vice-versa.
Parameter/Description
CONTROL
Hot gas bypass pressure set point
Def.
Min. Max.
UOM
3
PID: proportional gain
PID: integral time
PID: derivative time
15
150
5
-20
(290)
0
0
0
barg
(psig)
s
s
Tab. 5.n
200
(2900)
800
1000
800
Hot gas bypass by temperature
This control function can be used to control cooling capacity, which in the
following example is performed by driver B. On a refrigerated cabinet, if the
ambient temperature probe S4 measures an increase in the temperature, the
cooling capacity must also increase, and so the EVB valve must close. In the
example driver A is used for superheat control.
23
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
ENG
EVA_2
C
EVA_1
L
EVB_1
EVB
C
CP
F
EVD evolution
EVB_2
twin
EVD evolution
M
twin
S
EEVA
V
S1
S2
S3
S4
S4
S1
S2
S
CP
TB
E
V3
TB
PA TA
Fig. 5.i
M
T
V1
V2
E
4...20 mA
regulator
H%
Key:
CP
C
L
F
S
TA, TB
Compressor
Condenser
Liquid receiver
Dewatering filter
Liquid indicator
Temperature probe
V
EEVA
EVB
E
PA
Solenoid valve
Electronic expansion valve A
Electronic valve B
Evaporator
Pressure probe driver A
Fig. 5.j
Key:
CP
Compressor
This involves PID control without any protectors (LowSH, LOP, MOP, see the
chapter on Protectors), without any valve unblock procedure. Control is
performed on the hot gas bypass temperature probe value read by input S4,
compared to the set point: “Hot gas bypass temperature set point”. Control is
reverse, as the temperature increases, the valve closes.
C
V1
V3
S
Condenser
Solenoid valve
Non-return valve
Heat exchanger
(reheating)
Parameter/Description
CONTROL
Hot gas bypass temperature set point
Def.
Min.
Max.
UOM
For the wiring, see paragraph 2.11 “General connection diagram”.
10
Transcritical CO2 gas cooler
15
150
5
200
(392)
800
1000
800
°C (°F)
PID: proportional gain
PID: integral time
PID: derivative time
-60
(-76)
0
0
0
s
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:
For the wiring, see paragraph 2.11 “General connection diagram”.
Tab. 5.o
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 EVB_2 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). In addition, if dehumidification needs to be
increased, with less cooling, valve EVA_2 must open to bypass at least some
of the refrigerant to condenser C. The refrigerant that reaches the evaporator
thus has less cooling capacity. Valves EVA_1 and EVA_2 are also connected
together in complementary mode, controlled by the 4 to 20 mA signal on
input S1, from an external regulator.
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
EVA_1, 2
EVB_1, 2
H%
TB
E
V2
Electronic valves connected in
complementary mode
Relative humidity probe
Temperature probe
Evaporator
Thermostatic expansion valve
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 control is performed by driver A and
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.
Driver B is used for superheat control.
24
ENG
EVA
EVD evolution
twin
twin
T
regulator
P
S1
S1
S2
S3
S4
EVD evolution
GC
EVA
PA TA
4...20 mA
CP
EVB
IHE
T
EVD evolution
regulator
twin
S3
P
M
4...20 mA
EEVB
A1, A2
E
V1
100%
PB TB
0%
4
Fig. 5.k
mA
Fig. 5.l
Key:
CP
GC
E
V1
20
Compressor
Gas cooler
Evaporator
Solenoid valve
EVA Electronic valve A
EEVB Electronic expansion valve B
IHE Inside heat exchanger
Key:
EVA Electronic valve A
EVB Electronic valve B
For the wiring, see paragraph 2.11 “General connection diagram”.
Valve opening A
Valve opening B
For the wiring, see paragraph 2.11 “General connection diagram”.
This involves PID control without any protectors (LowSH, LOP, MOP, see the
chapter on Protectors), without any valve unblock procedure. 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.
Def.
Min.
Max.
UOM
3.3
-22.7
-100
-100
800
800
-
15
150
5
0
0
0
800
1000
800
Analogue positioner (0 to 10 Vdc)
This control function is only available for driver A. The valve will be positioned
linearly depending on the value of the “0 to 10 V input for analogue valve
positioning” read by input S2.
There is no PID control nor any protection (LowSH, LOP, MOP), and no valve
unblock procedure. The opening of digital input DI1 stops control on driver
A, with corresponding forced closing of the valve and changeover to standby
status.
EVA
s
s
Tab. 5.p
T
EVD evolution
regulator
twin
P
S2
Parameter/Description
SPECIAL
Transcritical CO2: coefficient A
Transcritical CO2 : coefficient B
CONTROL
PID : proportional gain
PID : integral time
PID : derivative time
A1
A2
Analogue positioner (4 to 20 mA)
0...10 Vdc
This control function is available for driver A and driver B. Valve A will be
positioned linearly depending on the value of the “4 to 20 mA input for
analogue valve positioning” read by input S1.
Valve B will be positioned linearly depending on the value of the “4 to 20 mA
input for analogue valve positioning” read by input S3.
There is no PID control nor any protection (LowSH, LOP, MOP, see the chapter
on Protectors), and no valve unblock procedure.
A1
100%
0%
0
Forced closing will only occur when digital input DI1 opens for driver A or
DI2 for driver B, 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.
10
Vdc
Fig. 5.m
Key:
EVA Electronic valve A
A1
Valve opening A
For the wiring, see paragraph 2.11 “General connection diagram”.
25
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
ENG
I/O expander for pCO
The EVD Evolution twin driver is connected to the pCO programmable
controller via LAN, transferring the probe readings quickly and without filtering.
Each 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
Def.
multiplexed showcase/cold
room
Tab. 5.q
EEVB
EEVA
S1
S2
S3
S4
EVD
evolution
GND Tx/Rx
TB
TA
GND
PB
pCO
PA
shield
Fig. 5.n
Key:
T
Temperature probe
EEV Electronic valve
P
Pressure probe
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
26
ENG
6. FUNCTIONS
Calibrating pressure probes S1, S3 and temperature
probes S2 and S4 (offset and gain parameters)
6.1 Power supply mode
EVD evolution twin 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
SPECIAL
Power supply mode
0=24 Vac
1= 24 Vdc
Def.
Min.
Max.
UOM
0
0
1
-
If needing to be calibrate:
• the pressure probe, S1 and/or S3, the offset parameter can be used, 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 and/or S3needs 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.
• the temperature probe, S2 and/or S4, the offset parameter can be used,
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.
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
EVBAT00400 battery module is connected.
6.2 Network connection
B
To connect an RS485/Modbus® controller to the network, as well as the
network address parameter (see paragraph 4.2), the communication speed
also needs to be set, in bit/s, using the “network settings” parameter.
Parameter/Description
SPECIAL
Network settings
0 = 4800; 1 = 9600; 2 = 19200
B
A
A
mA
4
Def.
Min.
Max.
UOM
2
0
2
bit/s
Key:
Tab. 6.b
A= offset,
B= gain
Vdc
20
0
10
Fig. 6.a
Note: the following Modbus® serial communication parameters
cannot be set:
• byte size: 8 bits;
• stop bits: 2;
• parity: none;
• transmission mode: RTU.
Parameter/description
Probes
S1: calibration offset
Def. Min.
Max.
UOM
0
S1: calibration gain, 4 to 20 mA
S2: calibration offset
S2: calibration gain, 0 to 10 V
S3: calibration offset
S3: calibration gain, 4 to 20 mA
S4: calibration offset
1
0
1
0
1
0
60 (870),
60
20
20 (36)
20
60 (870)
20
20 (36)
barg (psig),
mA
°C (°F), volt
barg (psig)
°C (°F)
Tab. 6.d
-60 (-870),
-60
-20
-20 (-36)
-20
-60 (-870)
-20
-20 (-36)
6.3 Inputs and outputs
Analogue inputs
Digital inputs
The parameters in question concern the choice of the type of pressure 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 probes S1 and S3, see the chapter on “Commissioning”.
The functions of digital inputs 1 and 2 can be set by parameter, as shown in
the table below:
Parameter/description
Def. Min.
CONFIGURATION
DI1 configuration
5/6 1
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
10 0
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”.
Type
CAREL NTC (10KΩ at 25°C)
CAREL code
NTC0**HP00
NTC0**WF00
NTC0**HF00
CAREL NTC-HT HT (50KΩ at 25°C) NTC0**HT00
Range
-50T105°C
Combined NTC
0T120°C
(150 °C for 3000 h)
-40T120°C
SPKP**T0
Important: for combined NTC probes, also select the parameter
relating to the corresponding ratiometric pressure probe.
Max.
UOM
7
-
60
min
Tab. 6.e
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;
this parameter is common to both drivers.
Parameter/description
Def.
CONFIGURATION
Probe S2:
CAREL NTC
1= CAREL NTC; 2= CAREL NTC-HT high T.; 3= Combined NTC
SPKP**T0; 4= 0 to 10 V external signal
Probe S4:
CAREL NTC
1= CAREL NTC; 2= CAREL NTC-HT high T.; 3= Combined NTC
SPKP**T0
Tab. 6.c
Discharged battery alarm management: this setting can only be selected if
the controller power supply is 24 Vac. 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.
27
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
ENG
G
G0
VBAT
There are four possible cases of digital input configurations with primary or
secondary functions.
Driver A
Case Function set Function performed by
digital input
DI1
DI2
PRIM
SEC
1
PRIM PRIM DI1
2
PRIM SEC DI1
DI2
3
SEC
PRIM DI2
4
SEC
SEC Regulation
DI1
backup driver
A (supervisor
variable)
EVBAT00500
4 AT
+
Note that:
if digital inputs 1 and 2 are set to perform a PRIM function, driver A performs
the function set by digital input 1 and driver B the function set by digital
input 2;
• if digital inputs 1 and 2 are set to perform a PRIM and SEC function
respectively, driver A and driver B perform the PRIM function set on digital
input DI1. Driver A will also perform the SEC function set on digital input
DI2;
• if digital inputs 1 and 2 are set to perform a SEC and PRIM function
respectively, driver A and driver B perform the PRIM function set on digital
input DI2. Driver B will also perform the SEC function set on digital input
DI1;
• if digital inputs 1 and 2 are set to perform a SEC function, driver A will
perform the SEC function set on input DI1 and driver B will perform
the SEC function set on input DI2. Each driver will be set to “Regulation
backup”, with the value of the digital input determined respectively by the
supervisor variables:
- Regulation backup from supervisor (driver A);
- Regulation backup from supervisor (driver B).
G
G0
VBAT
GND
BAT ERR
EVD Battery module
EVBAT00400
•
DI1
DI2
GND
EVD evolution
TWIN
24 Vac
230 Vac
35 VA
Driver B
Function performed by
digital input
PRIM
SEC
DI2
DI1
DI2
DI1
Regulation
DI2
backup driver
B) (supervisor
variable)
2 AT
TRADRFE240
Fig. 6.b
Valve forced open: when the digital input closes, the valve opens completely
Examples
(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.
Example 1: assuming an EVD Evolution twin controller connected to the LAN.
In this case, the start/stop control will come from the network.
The two digital inputs can be configured for:
1. valve regulation optimization after defrost (SEC function);
2. regulation backup (PRIM function).
With reference to the previous table:
• in case 2, when there is no communication both driver A and driver B will
be enabled for control by digital input 1, and digital input 2 will determine
when control stops to run the defrost for driver A only;
• in case 3 when there is no communication digital input 2 will activate
control for both driver A and driver B. Digital input 1 will determine when
control stops to run the defrost for driver B only.
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: sif 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.
Example 2: assuming an EVD Evolution twin controller in stand-alone
operation. In this case, the start/stop control will come from the digital input.
The following cases are possible:
1. start / stop driver A/B from inputs DI1/DI2 (case 1);
2. simultaneous start / stop of both drivers A/B from input DI1 (case 2); input
DI2 can be used for discharged battery alarm management.
Priority of digital inputs
In certain cases the setting of digital inputs 1 and 2 may be incompatible
(e.g. no regulation start/stop). The problem thus arises to determine which
function each driver needs to perform.
Relay outputs
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
The relay outputs 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
Type of function
SEC
SEC
SEC
SEC
PRIM
PRIM
PRIM
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
Parameter/description
Def.
CONFIGURATION
Relay configuration:
Alarm
1= Disabled; 2= Alarm relay (open when alarm active);
relay
3= Solenoid 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)
Tab. 6.f
28
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%).
6.4 Control status
The electronic valve controller has 8 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 controller-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
pLAN 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
If the capacity request is 100%:
Opening (%)= (Valve opening at start-up);
If the capacity request is less than 100% (capacity control):
Opening (%)= (Valve opening at start-up) x (Current unit cooling capacity),
where the current unit cooling capacity is sent to the driver via pLAN by the
pCO controller. If the driver is stand-alone, this is always equal to 100%.
Note:
•
•
Forced closing
•
Forced closing is performed after the controller 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.
Parameter/description
Def.
Min.
Max.
UOM
VALVE
EEV closing steps
500
0
9999
step
Tab. 6.g
Wait
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.
Control
The control request for each driver can be received, respectively, by the closing
of digital input 1 or 2, via the network (pLAN). 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.
The valve is closed in the event of power failures with 24 Vac power supply
when the EVBAT00400 battery 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. EVD Evolution twin does not make any decision and 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). EVD Evolution
twin resets the parameter to 0 (zero) only if forced emergency closing is
completed successfully
Control delay after defrost
Some types of refrigerating cabinets have problems controlling the electronic
valve in the operating phase after a 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 the
digital input. The “Start 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
alarm procedures, etc. are managed.
Standby
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 electronic valve control is in standby when the
compressor stops or the control solenoid valve closes. The valve is closed or
open, delivering around 25% of the flow-rate of refrigerant, based on the
setting of the “valve open in standby” parameter.
In this phase, manual positioning can be activated.
.
Parameter/description
CONTROL
Valve open in standby
0=disabled=valve closed;
1=enabled = valve open 25%
Def.
Min.
Max.
UOM
0
0
1
-
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
Def.
Min.
Max.
UOM
CONTROL
Start delay after defrost
10
0
60
min
Tab. 6.j
Important: if the superheat temperature should fall below the set
point, control resumes even if the delay has not yet elapsed.
Tab. 6.h
Prepositioning/start control
If during standby a control request is received, before starting control the
valve is moved to a precise initial position.
The 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-position time
6
Valve opening at start-up (evaporator/valve 50
capacity ratio)
Min.
Max.
UOM
0
0
18000 s
100
%
Tab. 6.i
29
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
ENG
A
ON
A
OFF
S
OFF
t
ON
S
OFF
ST
t
ON
OFF
t
ON
ST
OFF
R
ON
t
ON
OFF
t
ON
R
OFF
t
ON
OFF
t
T4
t
T4
Fig. 6.c
Fig. 6.e
Key:
A
S
P
R
Control request
Standby
Pre-positioning
Control
W
T1
T2
t
Key:
Wait
Pre-position time
Start delay after defrost
Time
A
S
ST
Control request
Standby
Stop
R
T4
t
Control
Stop position time
Time
Positioning (change cooling capacity)
This control status is only valid for the pLAN controller.
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.
6.5 Special control status
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.
Manual positioning
A
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 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.
Parameter/Description
CONTROL
Enable manual valve positioning
Manual valve position
Def.
Min.
Max.
UOM
0
0
0
0
1
9999
t
step
Tab. 6.k
t
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.
ON
OFF
C
ON
OFF
NP
ON
Note:
OFF
R
•
t
ON
•
OFF
T3
W
t
Fig. 6.d
Recover physical valve position
Key:
A
C
NP
R
Control request
Change capacity
Repositioning
Control
T3
W
t
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.
Parameter/Description
VALVE
Synchronise valve position in opening
Synchronise valve position in closing
Repositioning time
Wait
Time
Min. Max. UOM
1
1
0
0
1
1
Tab. 6.l
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 controller 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.
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 TWIN” +0300006EN - rel. 2.2 - 19.03.2012
Def.
30
ENG
Note:
•
•
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.
Unblock valve
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 doe 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.
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.
31
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
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 integral time is set automatically based on the type of main control.
SH
7.1 Protectors
Low_SH_TH
There are 3 protectors:
• LowSH, low superheat;
• LOP, low evaporation temperature;
• MOP, high evaporation temperature;
Low_SH
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;
integral 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 delay (if set
to 0 disables the alarm signal).
A
D
Fig. 7.a
SH
Low_SH_TH
Low_SH
B
Tab. 7.a
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.
LowSH (low superheat)
Parameter/description
CONTROL
LOP protection: threshold
The protector is activated so as to prevent the return of liquid to the
compressor due to excessively low superheat values.
Min.
Max.
UOM
5
15
-40 (-72)
0
SH set point
800
K (°F)
s
300
0
18000
s
A
D
t
Alarm
Alarm delay
Time
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 integral time
indicates the intensity of the action: the lower the value, the more intense
the action.
Reset
Immediate
Immediate
Controlled
Def.
Superheat
Low_SH protection threshold
Low_SH protection
Automatic alarm reset
LOP (low evaporation pressure)
Characteristics of the protectors
Parameter/description
CONTROL
LowSH protection: threshold
LowSH protection: integral time
ALARM CONFIGURATION
Low superheat alarm delay
(LowSH) (0= alarm disabled)
t
B
Key:
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.
Reaction
Intense closing
Intense opening
Moderate closing
t
ON
OFF
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.
Protection
LowSH
LOP
MOP
t
ON
LOP protection: integral time
ALARM CONFIGURATION
Low evaporation temperature
alarm delay (LOP)
(0= alarm disabled)
Def.
Min.
Max.
UOM
-50
0
-60
(-76)
0
MOP protection: °C (°F)
threshold
800
s
300
0
18000
s
Tab. 7.c
Tab. 7.b
The integral time is set automatically based on the type of main control.
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
32
ENG
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. 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 integral time indicates the intensity
of the action: the lower the value, the more intense the action.
Note:
•
•
•
the LOP threshold must be lower then the rated evaporation 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;
the LOP alarm can be used as an alarm to highlight refrigerant leaks by
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
MOP_TH
MOP_TH - 1
MOP
t
ON
OFF
T_EVAP
LOP_TH
PID
t
ON
OFF
LOP
t
ON
OFF
ALARM
t
ON
OFF
A
t
ON
t
D
OFF
Fig. 7.c
D
B
t
Key:
Fig. 7.b
T_EVAP
PID
MOP
D
Key:
T_EVAP
LOP_TH
LOP
B
Evaporation temperature
Low evaporation temperature
protection threshold
LOP protection
Automatic alarm reset
D
Alarm delay
ALARM Alarm
t
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.
MOP= Maximum Operating Pressure.
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 units with compressor on board 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: integral time
ALARM CONFIGURATION
High evaporation temperature
alarm delay (MOP)
(0= alarm disabled)
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.
Time
MOP (high evaporation pressure)
Parameter/description
CONTROL
MOP protection: threshold
Evaporation temperature
PID superheat control
MOP protection
Alarm delay
Def.
Min.
Max.
UOM
50
200
(392)
800
°C (°F)
20
LOP protection:
threshold
0
600
0
18000 s
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 control restarts in a
controlled manner to prevent the evaporation temperature from exceeding
the threshold again..
s
Tab. 7.d
The integral time is set automatically based on the type of main control.
33
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
ENG
8. TABLE OF PARAMETERS
Def.
Min.
Max.
UOM
CAREL SVP
Modbus®
Parameter/description
Type **
user *
8.1 Table of parameters, driver A
Note
pLAN: 30
others: 198
R404A
1
207
-
I
11
138
CO
-
-
-
I
13
140
-
CAREL EXV
-
-
-
I
14
141
Ratiometric: -1 to 9.3 barg
-
-
I
16
143
CONFIGURATION
A
Network address
A
Refrigerant:
1= R22
2= R134a
4= R407C
5= R410A
7= R290
8= R600
10= R717
11= R744
13= R1270
14= R417A
16= R413A
17= R422A
19= R407A
20= R427A
Valve:
1= CAREL EXV
2= Alco EX4
3= Alco EX5
4= Alco EX6
5= Alco EX7
6= Alco EX8 330 Hz recommended CAREL
7= Alco EX8 500 Hz specific 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 ETS 100B
17= Danfoss ETS 250
18= Danfoss ETS 400
19= two CAREL EXV connected together
20= Sporlan SER(I)G, J, K
21= Danfoss CCM 10-20-30
22= Danfoss CCM 40
Probe S1:
A
A
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
3= R404A
6= R507A
9= R600a
12= R728
15= R422D
18= R423A
Electronic (OUT=4 - 20 mA)
8= -0.5 to 7 barg
9= 0 to 10 barg
10= 0 to 18.2 bar
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= 4 to 20mA external signal
21= -1 to 12.8 barg
22= 0 to 20.7 barg
23= 1.86 to 43.0 barg
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
34
CO
user *
Parameter/description
Def.
Min.
Max.
UOM
Type **
CAREL SVP
Modbus®
ENG
Note
A
Main control:
1= Multiplexed showcase/cold room
2= Showcase/cold room with compressor on board
3= “Perturbed” showcase/cold room
4= Showcase/cold room with sub-critical CO2
5= R404A condenser for sub-critical 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
11= EPR back pressure
12= Hot gas bypass by pressure
13= Hot gas bypass by temperature
14= Transcritical CO2 gas cooler
15= Analogue positioner (4 to 20 mA)
16= Analogue positioner (0 to 10 V)
17= Air-conditioner/chiller or showcase/cold room with
adaptive control
18= Air-conditioner/chiller with Digital Scroll compressor
19= AC or chiller with SIAM ANB scroll compressor (CANNOT
BE SELECTED)
20= superheat regulation with 2 temperature probes (CANNOT
BE SELECTED)
21= I/O expander for pCO (*)
(*)= parameter common to driver A and driver B
Probe S2:
1= CAREL NTC
2= CAREL NTC-HT hi temp.
3= Combined NTC SPKP**T0
4= 0 to 10 V external signal
Auxiliary control:
Disabled (NOT MODIFIABLE)
Probe S3:
Multiplexed
showcase/
cold room
-
-
-
I
15
142
-
CAREL NTC
-
-
-
I
17
144
CO
-
-
-
-
I
18
145
CO
Ratiometric: -1 to 9.3 barg
-
-
I
19
146
CO
Alarm relay
-
-
-
I
12
139
-
CAREL NTC
-
-
-
I
20
147
-
Regulation
start/stop
(tLAN-RS485)
/ Regulation
backup
(pLAN)
-
-
I
10
137
CO
A
A
A
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
A
A
A
Electronic (OUT=4 - 20 mA)
8= -0.5 to 7 barg
9= 0 to 10 barg
10= 0 to 18.2 bar
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= 4 to 20mA external signal
21= -1 to 12.8 barg
22= 0 to 20.7 barg
23= 1.86 to 43.0 barg)
Relay configuration:
1= Disabled
2= Alarm relay (open when alarm active)
3= Solenoid 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)
Probe S4:
1= CAREL NTC
2= CAREL NTC-HT high temperature
3= Combined NTC SPKP**T0
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
35
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
user *
Parameter/description
Def.
Min.
Max.
UOM
Type **
CAREL SVP
Modbus®
ENG
Note
C
Variable 1 on display:
1= Valve opening
2= Valve position
3= Current cooling capacity
4= Set point control
5= Superheat
6= Suction temperature
7= Evaporation temperature
8= Evaporation pressure
9= Condensing temperature
10= Condensing pressure
11= Modulating thermostat temperature(*)
12= EPR pressure
13= Hot gas bypass pressure
14= Hot gas bypass temperature
15= CO2 gas cooler outlet temperature
16= CO2 gas cooler outlet pressure
17= CO2 gas cooler pressure set point
18= Probe S1 reading
19= Probe S2 reading
20= Probe S3 reading
21= Probe S4 reading
22= 4 to 20 mA input
23= 0 to 10 V input
(*) CANNOT BE SELECTED
Variable 2 on display (see variable 1 on display)
Superheat
-
-
-
I
45
172
-
Valve opening
Valve in fixed position
-
-
I
46
173
-
-
-
I
24
151
CO
Valve in fixed position
-
-
I
25
152
CO
No action
-
-
-
I
26
153
CO
No action
-
-
-
I
27
154
CO
°C/K/barg
Regulation
start/stop
(tLAN-RS485)
/ Regulation
backup
(pLAN)
-
-
I
I
21
85
148
212
CO
CO
Italiano
-
-
-
C
C
C
C
C
C
A
C
Probe S1 alarm management:
1= No action
2= Forced valve closing
3= Valve in fixed position
4= Use backup probe S3 (*)
(*) CANNOT BE SELECTED
Probe S2 alarm management:
1= No action
2= Forced valve closing
3= Valve in fixed position
4= Use backup probe S4 (*)
(*) CANNOT BE SELECTED
Probe S3 alarm management:
1= No action
2= Forced valve closing
3= Valve in fixed position
Probe S4 alarm management:
1= No action
2= Forced valve closing
3= Valve in fixed position
Unit of measure: 1= °C/K/barg; 2= °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: Italiano; English
CO
PROBES
C
S1: calibration offset
0
-60 (-870), -60 60 (870), 60
C
C
S1: calibration gain, 4 to 20 mA
Pressure S1: MINIMUM value
1
-1
-20
-20 (-290)
C
Pressure S1: MAXIMUM value
9.3
C
Pressure S1: MINIMUM alarm value
-1
Pressure S1:
MINIMUM
value
-20 (-290)
C
Pressure S1: MAXIMUM alarm value
9.3
C
S2: calibration offset
0
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
Pressure S1:
MINIMUM
alarm value
-20 (-36), -20
36
barg (psig)
mA
barg (psig)
A
34
33
CO
A
A
36
32
35
31
CO
CO
barg (psig)
A
30
29
CO
Pressure S1:
MAXIMUM
alarm value
200 (2900)
barg (psig)
A
39
38
CO
barg (psig)
A
37
36
CO
20 (36), 20
°C (°F), volt
A
41
40
CO
20
Pressure S1:
MAXIMUM
value
200 (2900)
CAREL SVP
Modbus®
Note
A
A
43
46
42
45
CO
CO
A
44
43
CO
barg (psig)
barg (psig)
A
A
A
35
82
33
34
81
32
CO
CO
CO
barg (psig)
A
31
30
CO
barg (psig)
A
40
39
CO
barg (psig)
A
38
37
CO
user *
Type **
ENG
Parameter/description
Def.
Min.
Max.
C
C
S2: calibration gain, 0 to 10 V
Temperature S2: MINIMUM alarm value
1
-50
-20
-60 (-76)
C
Temperature S2: MAXIMUM alarm value
105
C
C
C
S3: calibration offset
S3: calibration gain, 4 to 20 mA
Pressure S3 : MINIMUM value
0
1
-1
Temperature
S2: MINIMUM
alarm value
-60 (-870)
-20
-20 (-290)
20
Temperature °C (°F)
S2: MAXIMUM
alarm value
200 (392)
°C (°F)
C
Pressure S3: MAXIMUM value
9.3
C
Pressure S3: MINIMUM alarm value
-1
C
Pressure S3: MAXIMUM alarm value
9.3
C
C
S4: calibration offset
Temperature S4: MINIMUM alarm value
0
-50
C
Temperature S4: MAXIMUM alarm value
105
Temperature
S4: MINIMUM
alarm value
Pressure S3:
MINIMUM
value
-20 (-290)
Pressure S3:
MINIMUM
alarm value
-20 (-36)
-60 (-76)
UOM
60 (870)
20
Pressure S3:
MAXIMUM
value
200 (2900)
Pressure S3:
MAXIMUM
alarm value
200 (2900)
20 (36)
°C (°F)
Temperature °C (°F)
S4: MAXIMUM
alarm value
200 (392)
°C (°F)
A
A
42
47
41
46
CO
CO
A
45
44
CO
180 (324)
K (°F)
A
50
49
-
100
1
%
-
I
D
37
23
164
22
-
60
18000
200 (392)
200 (2900)
200 (2900)
800
1000
800
SH set point
800
MOP protection: threshold
800
200 (392)
min
s
°C (°F)
barg (psig)
barg (psig)
s
s
K (°F)
s
°C (°F)
I
I
A
A
A
A
I
A
A
A
A
40
90
28
62
29
48
38
49
56
55
52
167
217
27
61
28
47
165
48
55
54
51
-
s
°C (°F)
A
A
51
54
50
53
-
800
1
9999
180 (324)
200 (392)
s
step
K (F°)
°C (°F)
A
D
I
A
A
53 52
24 23
39 166
100 99
101 100
-
CONTROL
A
Superheat set point
11
A
C
50
0
C
A
A
A
A
C
C
C
A
C
A
Valve opening at start-up (evaporator/valve capacity ratio)
Valve open in standby
(0= disabled= valve closed;
1= enabled= valve open 25%)
Start delay after defrost - CANNOT BE SELECTED
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 protection: integral time
LOP protection: threshold
LowSH: threshold
0
0
10
6
10
3
3.5
15
150
5
5
15
-50
0
0
-60 (-76)
-20 (-290)
-20 (-290)
0
0
0
-40 (-72)
0
-60 (-76)
C
A
LOP protection: integral time
MOP protection: threshold
0
50
C
A
A
C
C
MOP protection: integral time
Enable manual valve positioning
Manual valve position
Discharge superheat setpoint (CANNOT BE SELECTED)
Discharge temperature setpoint (CANNOT BE SELECTED)
20
0
0
35
105
0
LOP protection: threshold
0
0
0
-40(-72)
-60(-76)
80
20
0
0. 1
0
3.3
-22.7
0
0
-60 (-76)
0
-60 (-76)
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
2
bit/s
I
74
201
CO
0
0
1
-
D
47
46
CO
SPECIAL
A
C
A
A
C
C
C
C
C
HiTcond: threshold - CANNOT BE SELECTED
HiTcond: integral time - CANNOT BE SELECTED
Modulating thermostat: set point - CANNOT BE SELECTED
Modulating thermostat: differential - CANNOT BE SELECTED
Mod. thermostat: SH set point offset - CANNOT BE SELECTED
Coefficient ‘A’ for CO2 control
Coefficient ‘B’ for CO2 control
Force manual tuning 0=no; 1= yes
Tuning method
0 to 100= automatic selection
101 to 141= manual selection
142 to 254= not allowed
255= PID parameters model identified
C Network settings
0= 4800
1= 9600
2= 19200
A Power supply mode
0= 24 Vac; 1= 24 Vdc
37
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
Def.
Min.
Max.
UOM
CAREL SVP
Modbus®
Parameter/description
Type **
user *
ENG
Note
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
-60 (-76)
0
200 (392)
18000
°C (°F)
s
A
I
26
9
25
136
-
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
Tab. 8.a
ALARM CONFIGURATION
C
C
C
C
C
C
Low superheat alarm delay (LowSH)
(0= alarm disabled)
Low evaporation temperature alarm delay (LOP)
(0= alarm disabled)
High evaporation temperature alarm delay (MOP)
(0= alarm disabled)
High condensing temperature alarm delay (HiTcond)
CANNOT BE SELECTED
Low suction temperature alarm threshold
Low suction temperature alarm delay
(0= alarm disabled)
VALVE
C
C
C
C
C
C
C
C
C
EEV minimum steps
EEV maximum steps
EEV closing steps
EEV rated speed
EEV rated current
EEV holding current
EEV duty cycle
Synchronise position in opening
Synchronise position in closing
* User level: A= Service (installer), C= manufacturer.
** Type of variable: A= Analogue; D= Digital; I= Integer
CO= parameter settable from driver A or from driver B
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
38
ENG
Def.
Min.
Max.
UOM
CAREL SVP
Modbus®
Parameter/description
Type **
user *
8.2 Table of parameters, driver B
Note
pLAN: 30
altri: 198
R404A
1
207
-
I
11
138
CO
-
-
-
I
55
182
-
CAREL EXV
-
-
-
I
54
181
Ratiometric: -1 to 9.3 barg
-
-
I
16
143
CONFIGURATION
A
Network address
A
Refrigerant:
1= R22
2= R134a
3= R404A
5= R410A
6= R507A
7= R290
9= R600a
10= R717
11= R744
13= R1270
14= R417A
15= R422D
17= R422A
18= R423A
19= R407A
21= R245Fa
22= R407F
Valve:
1= CAREL EXV
2= Alco EX4
3= Alco EX5
4= Alco EX6
5= Alco EX7
6= Alco EX8 330 Hz recommended CAREL
7= Alco EX8 500 Hz specific 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 ETS 100B
17= Danfoss ETS 250
18= Danfoss ETS 400
19= two CAREL EXV connected together
20= Sporlan SER(I)G, J, K
21= Danfoss CCM 10-20-30
22= Danfoss CCM 40
Probe S1:
A
A
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
4= R407C
8= R600
12= R728
16= R413A
20= R427A
Electronic (OUT=4 - 20 mA)
8= -0.5 to 7 barg
9= 0 to 10 barg
10= 0 to 18.2 bar
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= 4 to 20mA external signal
CO
21= -1 to 12.8 barg
22= 0 to 20.7 barg
23= 1.86 to 43.0 barg
39
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
user *
Parameter/description
Def.
Min.
Max.
UOM
Type **
CAREL SVP
Modbus®
ENG
Note
A
Main control:
1= Multiplexed showcase/cold room
2= Showcase/cold room with compressor on board
3= “Perturbed” showcase/cold room
4= Showcase/cold room with sub-critical CO2
5= R404A condenser for sub-critical 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
11= EPR back pressure
12= Hot gas bypass by pressure
13= Hot gas bypass by temperature
14= Transcritical CO2 gas cooler
15= Analogue positioner (4 to 20 mA)
16= Analogue positioner (0 to 10 V)
17= Air-conditioner/chiller or showcase/cold room with
adaptive control
18= Air-conditioner/chiller with Digital Scroll compressor
19= AC or chiller with SIAM ANB scroll compressor (CANNOT
BE SELECTED)
20= superheat regulation with 2 temperature probes (CANNOT
BE SELECTED)
21= I/O expander for pCO (*)
(*)= control only settable on driver A, however corresponds to
the entire controller
Probe S2:
1= CAREL NTC
2= CAREL NTC-HT hi temp.
3= Combined NTC SPKP**T0
4= 0 to 10 V external signal
Auxiliary control:
Disabled (NOT MODIFIABLE)
Probe S3:
Multiplexed
showcase/
cold room
-
-
-
I
56
183
-
CAREL NTC
-
-
-
I
17
144
CO
-
-
-
-
I
18
145
CO
Ratiometric: -1 to 9.3 barg
-
-
I
19
146
CO
Alarm relay
-
-
-
I
57
184
-
CAREL NTC
-
-
-
I
20
147
CO
Regulation
start/stop
(tLAN-RS485)
/ Regulation
backup
(pLAN)
-
-
I
10
137
CO
A
A
A
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
A
A
A
Electronic (OUT=4 - 20 mA)
8= -0.5 to 7 barg
9= 0 to 10 barg
10= 0 to 18.2 bar
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= 4 to 20mA external signal
21= -1 to 12.8 barg
22= 0 to 20.7 barg
23= 1.86 to 43.0 barg
Relay configuration:
1= Disabled
2= Alarm relay (open when alarm active)
3= Solenoid 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)
Probe S4:
1= CAREL NTC
2= CAREL NTC-HT high temperature
3= Combined NTC SPKP**T0
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
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
40
user *
Parameter/description
Def.
Min.
Max.
UOM
Type **
CAREL SVP
Modbus®
ENG
Note
C
Variable 1 on display:
1= Valve opening
2= Valve position
3= Current cooling capacity
4= Set point control
5= Superheat
6= Suction temperature
7= Evaporation temperature
8= Evaporation pressure
9= Condensing temperature
10= Condensing pressure
11= Modulating thermostat temperature(*)
12= EPR pressure
13= Hot gas bypass pressure
14= Hot gas bypass temperature
15= CO2 gas cooler outlet temperature
16= CO2 gas cooler outlet pressure
17= CO2 gas cooler pressure set point
18= Probe S1 reading
19= Probe S2 reading
20= Probe S3 reading
21= Probe S4 reading
22= 4 to 20 mA input
23= 0 to 10 V input
(*) CANNOT BE SELECTED
Variable 2 on display (see variable 1 on display)
Superheat
-
-
-
I
58
185
-
Valve opening
Valve in fixed position
-
-
I
59
186
-
-
-
I
24
151
CO
Valve in fixed position
-
-
I
25
152
CO
No action
-
-
-
I
26
153
CO
No action
-
-
-
I
27
154
CO
°C/K/barg
Regulation
start/stop
(tLAN-RS485)
/ Regulation
backup
(pLAN)
-
-
I
I
21
85
148
212
CO
CO
Italiano
-
-
-
-
-
-
CO
barg (psig)
mA
barg (psig)
A
34
33
CO
A
A
36
32
35
31
CO
CO
barg (psig)
A
30
29
CO
C
C
C
C
C
C
A
C
Probe S1 alarm management:
1= No action
2= Forced valve closing
3= Valve in fixed position
4= Use backup probe S3 (*)
(*) CANNOT BE SELECTED
Probe S2 alarm management:
1= No action
2= Forced valve closing
3= Valve in fixed position
4= Use backup probe S4 (*)
(*) CANNOT BE SELECTED
Probe S3 alarm management:
1= No action
2= Forced valve closing
3= Valve in fixed position
Probe S4 alarm management:
1= No action
2= Forced valve closing
3= Valve in fixed position
Unit of measure: 1= °C/K/barg; 2= °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: Italiano; English
PROBES
C
S1: calibration offset
0
-60 (-870), -60 60 (870), 60
C
C
S1: calibration gain, 4 to 20 mA
Pressure S1: MINIMUM value
1
-1
-20
-20 (-290)
C
Pressure S1: MAXIMUM value
9.3
C
Pressure S1: MINIMUM alarm value
-1
Pressure S1:
MINIMUM
value
-20 (-290)
C
Pressure S1: MAXIMUM alarm value
9.3
C
S2: calibration offset
0
Pressure S1:
MINIMUM
alarm value
-20 (-36), -20
41
20
Pressure S1:
MAXIMUM
value
200 (2900)
Pressure S1:
MAXIMUM
alarm value
200 (2900)
barg (psig)
A
39
38
CO
barg (psig)
A
37
36
CO
20 (36), 20
°C (°F), volt
A
41
40
CO
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
user *
Parameter/description
Def.
Min.
Max.
Type **
CAREL SVP
Modbus®
ENG
Note
C
C
S2: calibration gain, 0 to 10 V
Temperature S2: MINIMUM alarm value
1
-50
-20
-60 (-76)
A
A
43
46
42
45
CO
CO
C
Temperature S2: MAXIMUM alarm value
105
A
44
43
CO
C
C
C
S3: calibration offset
S3: calibration gain, 4 to 20 mA
Pressure S3 : MINIMUM value
0
1
-1
Temperature
S2: MINIMUM
alarm value
-60 (-870)
-20
-20 (-290)
20
Temperature °C (°F)
S2: MAXIMUM
alarm value
200 (392)
°C (°F)
barg (psig)
barg (psig)
A
A
A
35
82
33
34
81
32
CO
CO
CO
C
Pressure S3: MAXIMUM value
9.3
60 (870)
20
Pressure S3:
MAXIMUM
value
200 (2900)
barg (psig)
A
31
30
CO
C
Pressure S3: MINIMUM alarm value
-1
barg (psig)
A
40
39
CO
C
Pressure S3: MAXIMUM alarm value
9.3
Pressure S3:
MAXIMUM
alarm value
200 (2900)
barg (psig)
A
38
37
CO
C
C
S4: calibration offset
Temperature S4: MINIMUM alarm value
0
-50
A
A
42
47
41
46
CO
CO
C
Temperature S4: MAXIMUM alarm value
105
Temperature
S4: MINIMUM
alarm value
20 (36)
°C (°F)
Temperature °C (°F)
S4: MAXIMUM
alarm value
200 (392)
°C (°F)
A
45
44
CO
180 (324)
K (°F)
A
83
82
-
100
1
%
-
I
D
60
36
187
35
-
60
18000
200 (392)
200 (2900)
200 (2900)
800
1000
800
SH set point
800
MOP protection: threshold
800
200 (392)
min
s
°C (°F)
barg (psig)
barg (psig)
s
s
K (°F)
s
°C (°F)
I
I
A
A
A
A
I
A
A
A
A
40
90
84
85
86
87
61
88
89
90
91
167
217
83
84
85
86
188
87
88
89
90
CO
s
°C (°F)
A
A
92
93
91
92
-
800
1
9999
180 (324)
200 (392)
s
step
K (F°)
°C (°F)
A
D
I
A
A
94 93
32 31
53 180
100 99
101 100
-
Pressure S3:
MINIMUM
value
-20 (-290)
Pressure S3:
MINIMUM
alarm value
-20 (-36)
-60 (-76)
UOM
CONTROL
A
Superheat set point
11
A
C
50
0
C
A
A
A
A
C
C
C
A
C
A
Valve opening at start-up (evaporator/valve capacity ratio)
Valve open in standby
(0= disabled= valve closed;
1= enabled= valve open 25%)
Start delay after defrost - CANNOT BE SELECTED
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 protection: integral time
LOP protection: threshold
LowSH: threshold
0
0
10
6
10
3
3.5
15
150
5
5
15
-50
0
0
-60 (-76)
-20 (-290)
-20 (-290)
0
0
0
-40 (-72)
0
-60 (-76)
C
A
LOP protection: integral time
MOP protection: threshold
0
50
C
A
A
C
C
MOP protection: integral time
Enable manual valve positioning
Manual valve position
Discharge superheat setpoint (CANNOT BE SELECTED)
Discharge temperature setpoint (CANNOT BE SELECTED)
20
0
0
35
105
0
LOP protection: threshold
0
0
0
-40(-72)
-60(-76)
80
20
0
0. 1
0
3.3
-22.7
0
0
-60 (-76)
0
-60 (-76)
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
95
96
41
80
57
56
60
59
58
94
95
40
207
CO
CO
CO
CO
CO
-
2
0
2
bit/s
I
74
201
CO
0
0
1
-
D
47
46
CO
-
SPECIAL
A
C
A
A
C
C
C
C
C
HiTcond: threshold - CANNOT BE SELECTED
HiTcond: integral time - CANNOT BE SELECTED
Modulating thermostat: set point - CANNOT BE SELECTED
Modulating thermostat: differential - CANNOT BE SELECTED
Mod. thermostat: SH set point offset - CANNOT BE SELECTED
Coefficient ‘A’ for CO2 control
Coefficient ‘B’ for CO2 control
Force manual tuning 0=no; 1= yes
Tuning method
0 to 100= automatic selection
101 to 141= manual selection
142 to 254= not allowed
255= PID parameters model identified
C Network settings
0= 4800
1= 9600
2= 19200
A Power supply mode
0= 24 Vac; 1= 24 Vdc
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
42
Def.
Min.
Max.
UOM
CAREL SVP
Modbus®
Parameter/description
Type **
user *
ENG
Note
300
0
18000
s
I
62
189
-
300
0
18000
s
I
63
190
-
600
0
18000
s
I
64
191
-
600
0
18000
s
I
44
171
-
-50
300
-60 (-76)
0
200 (392)
18000
°C (°F)
s
A
I
97
65
96
192
-
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
66
67
68
69
70
71
72
37
38
193
194
195
196
197
198
199
36
37
Tab. 8.b
ALARM CONFIGURATION
C
C
C
C
C
C
Low superheat alarm delay (LowSH)
(0= alarm disabled)
Low evaporation temperature alarm delay (LOP)
(0= alarm disabled)
High evaporation temperature alarm delay (MOP)
(0= alarm disabled)
High condensing temperature alarm delay (HiTcond)
CANNOT BE SELECTED
Low suction temperature alarm threshold
Low suction temperature alarm delay
(0= alarm disabled)
VALVE
C
C
C
C
C
C
C
C
C
EEV minimum steps
EEV maximum steps
EEV closing steps
EEV rated speed
EEV rated current
EEV holding current
EEV duty cycle
Synchronise position in opening
Synchronise position in closing
* User level: A= Service (installer), C= manufacturer.
** Type of variable: A= Analogue; D= Digital; I= Integer
CO= parameter settable from driver A or from driver B
8.3 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).
Note: the units of measure K and R relate to degrees Kelvin or Rankine
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.
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 “Temperature S4: maximum alarm value” parameter, set to
150 °C, will be immediately converted to the corresponding value of 302 °F.
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
43
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
ENG
8.4 Variables accessible via serial – driver A
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
0
0
150
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Tab. 8.c
(*) The displayed variable is to be divided by 100, and allows us to appreciate
the hundredth of a bar (psig).
Alarms
PROTECT.
ACTIVATED
Alarms
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 to 20 mA input value (S1)
0 to 10 V input value (S2)
Control set point
Controller firmware version
MOP: suction temperature threshold (S2)
Valve position
Current unit cooling capacity
Adaptive control status
Last tuning result
Extended measured probe S1 (*)
Emergency closing speed valve A
Low suction temperature
LAN error
EEPROM damaged
Probe S1
Probe S2
Probe S3
Probe S4
EEV motor error
Status of relay A
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)
Status of digital input DI1
Status of digital input DI2
Guided initial procedure completed
Alarm Adaptive control ineffective
Mains power failure
Regulation backup from supervisor
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
Min
-20 (-290)
-60 (-870)
-20 (-290)
-60 (-76)
-60 (-76)
-60 (-76)
-20 (-290)
-60 (-76)
-20 (-290)
-40 (-72)
-20 (-290)
-60 (-76)
-60 (-76)
-20 (-290)
-20 (-290)
-60 (-76)
0
-20 (-290)
4
0
-60 (-870)
0
-60 (-76)
0
0
0
0
-2000 (-2901)
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
44
Max
200 (2900)
200 (2900)
200 (2900)
200 (392)
200 (392)
200 (392)
200 (2900)
200 (392)
200 (2900)
180 (324)
200 (2900)
200 (392)
200 (392)
200 (2900)
200 (2900)
200 (392)
100
200 (2900)
20
10
200 (2900)
800
200 (392)
9999
100
10
8
20000 (29007)
2000
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Type
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
I
I
I
I
D
D
D
D
D
D
D
D
D
I
I
I
I
D
D
D
D
D
D
D
D
D
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
4
7
75
76
83
86
1
2
3
4
5
6
7
8
9
50
51
52
53
10
11
12
14
15
22
40
45
46
Modbus®
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
24
101
131
134
202
203
210
213
0
1
2
3
4
5
6
7
8
49
50
51
52
9
10
11
13
14
21
39
44
45
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/W
R
R
R
R/W
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R/W
R
R
R/W
ENG
Alarms
PROTECT.
ACTIVATED
Alarms
8.5 Variables accessible via serial – driver B
Description
Suction temperature
Evaporation temperature
Evaporation pressure
Hot gas bypass temperature
EPR pressure (back pressure)
Superheat
Hot gas bypass pressure
CO2 gas cooler outlet pressure
CO2 gas cooler outlet temperature
Valve opening
CO2 gas cooler pressure set point
4 to 20 mA input value (S3)
Control set point
MOP: suction temperature threshold (S4)
Valve position
Current unit cooling capacity
Last tuning result
Adaptive control status
Emergency closing speed valve B
Extended measured probe S3 (*)
Low suction temperature
EEV motor error
Status of relay B
LOP (low evaporation temperature)
MOP high evaporation temperature)
LowSH (low superheat)
HiTcond (high condensing temperature)
Default
0
0
0
0
0
0
0
0
0
0
0
4
0
30
0
0
0
0
150
0
0
0
0
0
0
0
0
Min
-60 (-76)
-60 (-76)
-20 (-290)
-60 (-76)
-20 (-290)
-40 (-72)
-20 (-290)
-20 (-290)
-60 (-76)
0
-20 (-290)
4
-60 (-870)
-60 (-76)
0
0
0
0
1
-2000 (-2901)
0
0
0
0
0
0
0
Max
200 (392)
200 (392)
200 (2900)
200 (392)
200 (2900)
180 (324)
200 (2900)
200 (2900)
200 (392)
100
200 (2900)
20
200 (2900)
200 (392)
9999
100
8
10
2000
20000 (29007)
1
1
1
1
1
1
1
Type
A
A
A
A
A
A
A
A
A
A
A
A
A
A
I
I
I
I
I
I
D
D
D
I
I
I
I
CAREL SVP
69
70
71
74
72
68
73
76
75
66
77
78
67
103
49
50
78
77
86
84
29
30
31
54
55
56
57
Modbus®
68
69
70
73
71
67
72
75
74
65
76
77
66
102
176
177
205
204
213
211
28
29
30
53
54
55
56
R/W
R
R
R
R
R
R
R
R
R
R
R
R
R
R/W
R
R/W
R
R
R/W
R
R
R
R
R
R
R
R
LOP (low evaporation temperature)
MOP (high evaporation temperature)
LowSH (low superheat)
Driver B disconnected
Adaptive control ineffective
Regulation backup from supervisor (driver B)
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
D
D
D
D
D
D
27
28
26
35
42
48
26
27
25
34
41
47
R
R
R
R
R
R/W
Tab. 8.d
(*) 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.
45
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
ENG
8.6 Variables used based on the type of
control
The table below shows the variables used by the drivers depending on the
“Main control” parameter. At the end of the variable list are the screens used
to check the probe and valve electrical connections for driver A and driver
B. These variables are visible on the display by accessing display mode (see
paragraph 3.4) and via serial connection with VPM, PlantVisorPRO,… (see
paragraphs 8.4, 8.5)
Procedure for showing the variables on the display:
• press the Help and Enter buttons together to select driver A or B;
• press the UP/DOWN button;
• press the DOWN button to move to the next variable/screen;
• press the Esc button to return to the standard display.
Variable displayed
Valve opening (%)
Valve position (step)
Current unit cooling capacity
Set point control
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
Probe S1 reading
Probe S2 reading
Probe S3 reading
Probe S4 reading
4 to 20 mA input value
0 to 10 V input value
Status of digital input DI1(**)
Status of digital input DI2(**)
EVD firmware version
Display firmware version
Adaptive control status
0= not enabled or stopper
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 number of 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
Superheat
control
•
•
•
•
•
•
•
•
Main control
Transcritical Gas bypass
Gas bypass
CO2
temperature
pressure
•
•
•
•
•
•
•
•
•
•
•
Analogue
I/O expander
positioning for pCO
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Tab. 8.e
(*) The value of the variable is not displayed
(**) Status of digital input: 0= open, 1= closed.
Note: the readings of probes S1, S2, S3, S4 is always displayed, regardless
of whether or not the probe is connected
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
EPR back
pressure
•
•
•
46
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
ENG
9. ALARMS
9.1 Alarms
There are two types of alarms for each driver:
• system: valve motor, EEPROM, probe and communication;
• control: low superheat, LOP, MOP, low suction temperature.
The activation of the alarms depends on the setting of the threshold and
activation delay parameters. Setting the delay to 0 disables the alarms. The
EEPROM alarm always shuts down the controller.
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.
Superheating
4.9 K
Valve opening
44 %
A/B
1/3 A/B
Valve motor
error
OFF
ALARM
Relais
Fig. 9.b
• control alarm: next to the flashing ALARM message, the main page shows
the type of protector activated.
Superheating
Note: the alarm LED only comes on for the system alarms, and not for
4.9 K
the control alarms.
Valve opening
44 %
A/B OFF
MOP
ALARM
Relais
Example: display system alarm on LED board for driver A and for driver B
EVD
EVD
evolution
Fig. 9.c
evolution
Note:
twin
A
twin
B
•
A
to display the alarm queue, press the Help button and scroll using the
UP/DOWN buttons. If at the end of the alarms for driver A/B the following
message is shown:
Alarms active on driver B/A
1. press Esc to return to the standard display;
2. press the Help and Enter buttons together to move to the corresponding
driver;
3. press Help to display the required alarm queue.
B
Fig. 9.a
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.
•
the control alarms can be disabled by setting the corresponding delay to
zero.
The display shows both types of alarms, in two different modes:
system alarm: on the main page, the ALARM message is displayed, flashing.
Pressing the Help button displays the description of the alarm and, at the
top right, the total number of active alarms and the driver where the alarm
occurred (A / B). The same alarm may occur on both drivers (e.g. probe alarm)
Table of alarms
Type of alarm
Cause of
the alarm
LED
Probe S1
Probe S1 faulty
or exceeded set
alarm range
Probe S2
Display
Relay
Reset
Effects on
control
Checks/ solutions
red alarm ALARM
LED
flashing
Depends on
configuration
parameter
automatic
Probe S2 faulty
or exceeded set
alarm range
red alarm ALARM
LED
flashing
Depends on
configuration
parameter
automatic
Probe S3
Probe S3 faulty
or exceeded set
alarm range
red alarm ALARM
LED
flashing
Depends on
configuration
parameter
automatic
Probe S4
Probe S4 faulty
or exceeded set
alarm range
red alarm ALARM
LED
flashing
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
automatic
Depends on
parameter “Probe
S1 alarm management”
Depends on
parameter “Probe
S2 alarm management”
Depends on
parameter “Probe
S3 alarm management”
Depends on
parameter “Probe
S4 alarm management”
Protection action
already active
Check the probe connections. Check
the “Probe S1 alarm management”, &
“Pressure S1: MINIMUM & MAXIMUM
alarm value” parameters
Check the probe connections. Check
the “Probe S2 alarm management”, &
“Temperature S2: MINIMUM & MAXIMUM alarm value” parameters
Check the probe connections. Check
the “Probe S3 alarm management”, &
“Pressure S3: MINIMUM & MAXIMUM
alarm value” parameters
Check the probe connections. Check
the “Probe S4 alarm management”, &
“Temperature S4: MINIMUM & MAXIMUM alarm value ”
Check the “LowSH protection: threshold & alarm delay” parameters
ALARM flashing
& LowSH
LOP (low evapora- LOP protection
tion temperature) activated
-
ALARM flashing
& LOP
MOP (high evaporation temperature)
Low suction
temperature
-
ALARM flashing
& MOP
MOP protection
activated
Threshold and de- lay time exceeded
ALARM
flashing
47
automatic
automatic
automatic
Protection action Check the “Protection
already active
LOP: threshold & alarm delay” parameters
Protection action Check the “MOP protection: threshold
already active
& alarm delay” parameters
No effect
Check the threshold and delay
parameters.
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
ENG
Type of alarm
Cause of
the alarm
LED
EEPROM damaged
EEPROM for
operating and/or
unit parameters
damaged
Valve motor fault,
not connected
LAN network
communication
error
LAN network
connection error
green
NET LED
flashing
NET LED
off
EEV motor error
LAN error
Display
connection error
Driver B
disconnected
Alarms active on
driver A (1)
Alarms active on
driver B (2)
Adaptive control
ineffective
Wrong power
supply mode (*)
Display
Relay
Reset
Effects on
control
Checks/ solutions
red alarm ALARM flashing
LED
Depends on
configuration
parameter
Total shutdown
Replace the controller/Contact
service
red alarm ALARM flashing
LED
Depends on
configuration
parameter
Depends on
configuration
parameter
Depends on
configuration
parameter
No change
Replace
controller/
Contact
service
automatic
ALARM flashing
ALARM flashing
No communiERROR message
cation between
controller and
display
Connection error, red alarm ALARM flashing
driver B
LED B
Generic error,
driver A
Generic error,
driver B
Tuning failed
red alarm ALARM flashing
LED A
red alarm ALARM flashing
LED B
ALARM flashing
DC driver power
supply with “Power supply mode”
parameter set to
AC power supply
Green
POWER
LED
flashingRed
alarm
LED
-
automatic
Interruption
Check the connections and the condition of the motor. Switch controller
off and on again
Control based on Check the network address settings
DI1/DI2
automatic
Control based on Check the connections and that the
DI1/DI2
pCO is on and working
Replace
controller/
disply
No effect
Depends on
configuration
parameter
No change
automatic
automatic
Driver B: forced
Replace the controller
closing
Driver A: no effect
No effect
See list of alarms for driver A
No change
automatic
No effect
See list of alarms for driver B
No change
automatic
No effect
Depends on the
configuration
parameter
Change
“Power supply mode”
parameter
setting
Total shutdown
Change “Main control” parameter
setting
Check the “Power supply mode”
parameter and power supply
Check the controller/display and
connectors
Tab. 9.a
1) Message that appears at the end of the list of alarms for driver B.
(2) Message that appears at the end of the list of alarms for driver A.
(*) In the event of AC power supply with “Power supply mode” set to DC, no
alarm is displayed
9.3 Probe alarms
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.
9.2 Alarm relay configuration
The relay contacts are open when the controller is not powered.
During normal operation, the relay 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, HiTcond 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. The LOP alarm is excluded, as in the event
of low evaporation temperature closing the solenoid valve would worsen
the situation.
Parameter/description
Relay configuration:
1= Disabled
2= Alarm relay (open when alarm active)
3= Solenoid 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)
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
Pressure S1: MINIMUM alarm
value (S1_AL_MIN)
Pressure S1: MAXIMUM alarm
value (S1_AL_MAX)
Temperature S2: MINIMUM
alarm value (S2_AL_MIN)
Temperature S2: MAXIMUM
alarm value (S2_AL_MAX)
Pressure S3: MINIMUM alarm
value (S3_AL_MIN)
Pressure S3: MAXIMUM alarm
value (S3_AL_MAX)
Temperature S4: MINIMUM
alarm value (S4_AL_MIN)
Temperature S4: MAXIMUM
alarm value (S4_AL_MAX)
Def.
Alarm
relay
Tab. 9.b
Def. Min.
-1
9.3
-50
Max.
-20 (-290)
S1_AL_MAX barg
(psig)
S1_AL_MIN 200 (2900) barg
(psig)
-60 (-76)
S2_AL_MAX °C (°F)
105 S2_AL_MIN 200 (392)
-1
9.3
-50
UOM
°C (°F)
-20 (-290)
S3_AL_MAX barg
(psig)
S3_AL_MIN 200 (2900) barg
(psig)
-60 (-76)
S4_AL_MAX °C (°F)
105 S4_AL_MIN 200 (392)
°C (°F)
Tab. 9.c
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
48
ENG
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).
Parameter/description
CONFIGURATION
Probe S1 alarm management:
1= No action
2= Forced valve closing
3= Valve in fixed position
4= Use backup probe S3 (*)
(*)= CANNOT BE SELECTED
Probe S2 alarm management:
1= No action
2= Forced valve closing
3= Valve in fixed position
4= Use backup probe S4 (*)
(*)= CANNOT BE SELECTED
Probe S3 alarm management:
1= No action
2= Forced valve closing
3= Valve in fixed position
Probe S4 alarm management:
1= No action
2= Forced valve closing
3= Valve in fixed position
CONTROL
Valve opening at start-up (evaporator/valve capacity ratio)
Def.
Min. Max. UOM
Valve in fixed position -
Valve in fixed position -
No action
-
-
-
-
-
-
-
Parameter/Description
CONTROL
LowSH protection: threshold
LowSH protection: integral time
LOP protection: threshold
Def.
Min.
Max.
5
15
-50
K (°F)
s
°C (°F)
LOP protection: integral time
MOP protection: threshold
0
50
MOP protection: integral time
ALARM CONFIGURATION
Low superheat alarm delay (LowSH)
(0= alarm disabled)
Low evaporation temperature alarm
delay (LOP)
(0= alarm disabled)
High evaporation temperature alarm
delay (MOP)
(0= alarm disabled)
Low suction temperature alarm
threshold
Low suction temperature alarm
delay
20
-40 (-72) SH set point
0
800
-60 (-76) MOP: threshold
0
800
LOP: th- 200 (392)
reshold
0
800
300
0
18000
s
300
0
18000
s
600
0
18000
s
-50
-60 (-76) 200 (392)
°C (°F)
300
0
s
18000
UOM
s
°C (°F)
s
Tab. 9.e
No action
-
-
-
50
0
100
%
9.5 EEV motor alarm
At the end of the commissioning procedure and whenever the controller is
powered up, the valve motor error recognition procedure is activated. This
precedes 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 controller 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
controller, forced closing of the valve is performed immediately.
Tab. 9.d
9.4 Control alarms
These are alarms that are only activate during control.
Protector alarms
Important: after having resolved the problem with the motor, it is
recommended to switch the controller 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 control will not
be guaranteed until the next synchronisation.
The alarms corresponding to the LowSH, LOP and MOP protectors are only
activated during control when the corresponding activation threshold is
exceeded, and only when the delay time defined by the corresponding
parameter has elapsed. If a protector is not enabled (integral time= 0 s), no
alarm will be signalled. If before the expiry of the delay, the protector control
variable returns back inside the corresponding threshold, no alarm will be
signalled.
Note: this is a likely event, as during the delay, the protection function
will have an effect.
If the delay 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.
9.6 LAN error alarm
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 LAN error affects the operation of the controller as follows:
• case 1: unit in standby, digital input DI1/DI2 disconnected; driver A/B 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: driver A/B 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%.
Low suction temperature alarm
The low suction temperature alarm is not linked to any protection function.
It features a threshold and a delay, 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 delay 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 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.
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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 integral time. Initially
set the threshold 3 °C below the superheat set point, with an integral time of 3-4
seconds. Then gradually lower the low superheat threshold and increase the low
superheat integral 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 showcases in which
making sure that there are no repercussions on the control temperature.
the control set point is often reached (for
multiplexed showcases 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 (for MasterCase, MasterCase 2 and
(for multiplexed showcases mpxPRO only)
The superheat temperature measured
Check that the LowSH threshold is greater than the superheat value measured and that
only)
by the driver after defrosting and before
the corresponding protection is activated (integral time > 0sec). If necessary, decrease
reaching operating conditions is very low the value of the integral 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 integral time to 250 sec and increase the derivathere is still return of liquid to the compres- tive time to 10 sec.
sor rack
Many showcases defrosting at the same
Stagger the start defrost times. If this is not possible, if the conditions in the previous
time
two points are not present, increase the superheat set point and the LowSH thresholds
by at least 2 °C on the showcases 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 integral 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
(see paragraph 8.3)
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 (see paragraph 8.3).
values)
The superheat does NOT swing with the
As a first approach , decrease (by 30 to 50 %) the proportional factor. Subsequently
valve set in manual control (in the position try increasing the integral time by the same percentage. In any case, adopt parameter
corresponding to the average of the
settings recommended for stable systems.
working 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.
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50
ENG
PROBLEM
In the start-up phase with
high evaporator temperatures, the evaporation
pressure is high
CAUSE
MOP protection disabled or ineffective
SOLUTION
Activate the MOP protection by setting the threshold to the required saturated evaporation temperature (high evaporation temperature limit for the compressors) and
setting the MOP integral time to a value above 0 (recommended 4 seconds). To make
the protection more reactive, decrease the MOP integral 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 showcases only).
The “Valve opening at start-up” parameter Check the calculation in reference to the ratio between the rated cooling capacity of
In the start-up phase the
low pressure protection is
is set too low
the evaporator and the capacity of the valve; if necessary lower the value.
Check the pLAN / tLAN connections. Check that the pCO application connected to the
activated (only for units with The driver in pLAN or tLAN configuration does not start control and the valve
driver (where featured) correctly manages the driver start signal. Check that the driver
compressor on board)
is NOT in stand-alone mode.
remains closed
The driver in stand-alone configuration
Check the connection of the digital input. Check that when the control signal is sent
does not start control and the valve
that the input is closed correctly. Check that the driver is in stand-alone mode.
remains closed
LOP protection disabled
Set a LOP integral time greater than 0 sec.
LOP protection ineffective
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 integral time.
Solenoid blocked
Check that the solenoid opens correctly, check the electrical connections and the
operation of the relay.
Insufficient refrigerant
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.
The valve is connected incorrectly (rotates Check the movement of the valve by placing it in manual control and closing or opein 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.
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.
The “Valve opening at start-up” parameter Check the calculation in reference to the ratio between the rated cooling capacity of
is set too low
the evaporator and the capacity of the valve; if necessary lower the value.
The unit switches off due
LOP protection disabled
Set a LOP integral time greater than 0 sec.
LOP protection ineffective
Make sure that the LOP protection threshold is at the required saturated evaporation
to low pressure during
temperature (between the rated evaporation temperature of the unit and the correcontrol (only for units with
sponding temperature at the calibration of the low pressure switch) and decrease the
compressor on board)
value of the LOP integral time.
Solenoid blocked
Check that the solenoid opens correctly, check the electrical connections and the
operation of the control relay.
Insufficient refrigerant
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.
The valve is significantly undersized
Replace the valve with a larger equivalent.
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 (see paragraph 5.1).
Valve stuck closed
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.
The showcase does not
Solenoid blocked
Check that the solenoid opens correctly, check the electrical connections and the
reach the set temperature,
operation of the relay.
Insufficient refrigerant
Check that there are no bubbles of air in the liquid indicator upstream of the expansion
despite the value being
valve. Check that the subcooling is suitable (greater than 5 °C); otherwise charge the
opened to the maximum
circuit.
(for multiplexed showcases
The valve is significantly undersized
Replace the valve with a larger equivalent.
only)
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 (see paragraph 5.1).
Valve stuck closed
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.
The showcase does not
The driver in pLAN or tLAN configuraCheck the pLAN / tLAN connections. Check that the pCO application connected to the
reach the set temperature, tion does not start control and the valve
driver (where featured) correctly manages the driver start signal. Check that the driver
and the position of the valve remains closed
is NOT in stand-alone mode.
Check the connection of the digital input. Check that when the control signal is sent
is always 0 (for multiplexed The driver in stand-alone configuration
does not start control and the valve
that the input is closed correctly. Check that the driver is in stand-alone mode.
showcases only)
remains closed
Tab. 10.a
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11. TECHNICAL SPECIFICATIONS
Power supply
(Lmax= 5 m)
Power input
Emergency power supply
Insulation between relay output and
other outputs
Motor connection
Digital input connection
Probes (Lmax=10 m; S1
with shielded cable
less than 30 m)
S2
S3
S4
Relay output
Power supply to active probes (VREF)
RS485 serial connection
tLAN connection
pLAN connection
Assembly
Connectors
Dimensions
Operating conditions
Storage conditions
Index of protector
Environmental pollution
Resistance to heat and fire
Immunity against voltage surges
Rated impulse voltage
Type of relay action
Insulation class
Software class and structure
Conformity
•
•
24 Vac (+10/-15%) to be protected by external 2 A type T fuse.
24 Vdc (+10/-15%) 50/60 Hz to be protected by external 2 A type T fuse. Use a dedicated class 2 transformer (max 100 VA).
16.2 W ; 35 VA
22 Vdc+/-5%. (If the optional EVBAT00400 module is installed), Lmax=5 m
reinforced; 6 mm in air, 8 mm on surface; 3750 V insulation
4-wire shielded cable AWG 22, Lmax 10 m or 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
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
remote electronic pressure probe (4 to 20mA). Maximum number of drivers connected=5
combined ratiometric pressure probe (0 to 5 V):
• 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
low temperature NTC:
• 10 kΩ at 25°C, -50T90 °C; • measurement error: 1°C in range -50T50 °C; 3°C in range +50T90 °C
high temperature NTC:
• 50 kΩ at 25°C, -40T150 °C; • measurement error: 1.5 °C in range -20T115 °C, 4 °C in range outside of -20T115 °C
Combined NTC:
• 10 kΩ at 25 °C, -40T120 °C; • measurement error: 1 °C in range -40T50 °C; 3°C in range +50T90 °C
0 to 10 V input (max 12 V):
• resolution 0.1 % fs; • measurement error: 9% fs maximum; 8% typical
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
remote electronic pressure probe (4 to 20mA). Maximum number of drivers connected=5
4 to 20 mA input (max 24 mA):
• resolution 0.5% fs; • measurement error: 8% fs maximum; 7% typical
combined ratiometric pressure probe (0 to 5 V):
• resolution 0.1 % fs, • measurement error: 2 % fs maximum; 1 % typical
low temperature NTC:
• 10 kΩ at 25°C, -50T105°C; • measurement error: 1°C in range -50T50 °C; 3°C in range 50T90°C
high temperature NTC:
• 50 kΩ at 25°C, -40T150°C; • measurement error: 1.5°C in range -20T115°C 4°C in range outside of -20T115°C
Combined NTC:
• 10 kΩ at 25°C, -40T120°C; • measurement error 1°C in range -40T50°C; 3°C in range +50T90°C
normally open contact; 5 A, 250 Vac resistive load; 2 A, 250 Vac inductive load (PF=0.4); Lmax=50 m;
UL: 250 Vac, 5 A resistive, 1A FLA, 6A LRA, pilot duty D300. 30000 cycles
VDE: 1(1)A PF=0.6
+5 Vdc ±2% o 12 Vdc ±10% depending on type of probe set
Lmax=1000 m, shielded cable
Lmax=30 m, shielded cable
Lmax=500 m, shielded cable
DIN rail
plug-in, cable size 0.5 to 2.5 mm2 (12 to 20 AWG)
LxHxW= 70x110x60
-25T60°C (don’t use EVDIS* under -20°C); <90% RH non-condensing
-35T60°C (don’t store EVDIS* under -30°C), humidity 90% RH non-condensing
IP20
2 ( normal )
Category D
Category 1
2500V
1C microswitching
2
A
Electrical safety: EN 60730-1, EN 61010-1, UL873, 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)
Fig. 12.c
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..
2. 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
•
Then the user can choose to:
go to Configure device: the list of parameters will be displayed, allowing
the changes relating to the application to be made.
1. directly access the list of parameters for the EVD evolution twin
saved to EEPROM: select “tLAN”;
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 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 controller, choose the “Write” command.
During the write procedure, the 2 LEDs on the converter will flash.
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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 controller:
• read the list of parameters from the source controller with the “Read”
command;
• remove the connector from the service serial port;
• connect the connector to the service port on the destination controller;
• write the list of parameters to the destination controller 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
controller;
• select “Write”. During the write procedure, the LEDs on the converter will
flash.
The controller parameters will now have the default settings.
12.5 Updating the controller and display
firmware
The controller 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 2.7 for the connection diagram). The
firmware can be downloaded from http://ksa.carel.com. See the VPM On-line
help.
“EVD Evolution TWIN” +0300006EN - rel. 2.2 - 19.03.2012
54
CAREL INDUSTRIES HQs
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 TWIN” +0300006EN - rel. 2.2 - 19.03.2012
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