An intuitive and easy to navigate controller with
Modbus network capability
The EKE 347 controller is used for regulation of
the liquid level in:
• Pump reservoirs
• Separators
• Intermediate coolers
• Economisers
• Condensers
• Receivers
The controller is communicating with a
transmitter that continuously measures the
liquid level in the actual reservoir.
By comparing the measured value with the
level setpoint entered by the customer, the
controller dictates the valve to increase or
decrease the liquid ow to or from the
reservoir.
AI190286434038en-000501
Liquid level controller, Type EKE 347
Features
• Liquid level control
• Alarm if the set alarm limits are exceeded
• Relay outputs for upper and lower level limits and for alarm level
• User friendly and easy setup Wizard for rst time conguration
• PI control
• Low or High side control
• When AKV/A is selected, a MASTER/SLAVE system can run up to 3 AKV/A with distributed Opening Degree
• Manual control of output
• Limitation of Opening degree possible
• ON/OFF operation with hysteresis
• Programming menu with 3 access levels and separate passwords
• Connection to other EKE 347 controllers possible
• Wired remote display possible
• BUS communication:
◦ CAN Bus (Danfoss internal only)
◦ MODBUS RTU RS485 for communication with e.g. PLC
With the guided micro wave rod AKS 4100/4100U it is possible to set the refrigerant level within a wide range.
EKE 347
The controller receive a signal which enable it to contol low or high side applications (see page 3).
EKE 347 does support 2 types of Danfoss expansion valves. (see below) One
analog input is available as feed back from ICM in order to indicate opening
degree of the ICM.
Expansion valves
Two types of Danfoss expansion valves can be used
ICM
ICM are direct operated motorized valves
driven by digital stepper motor type ICAD
AKV/A
AKVA or AKV are pulse-width modulating
expansion valves.
MODBUS communication
EKE 347 include as standard RS 485 based MODBUSRTU bus communication interface to third
party equipment like PLC.
Via the MODBUS it is possible to read and write
parameters to the EKE 347
Operation, monitoring and data collection can
then be performed via PLC from a SCADA system.
Remote Display - option
A remote display for panel mounting is available. From the remote display a full
overview and access is possible to all individual EKE 347 controllers connected to
the internal Danfoss CAN bus.
Modulating control of injection for a more stable liquid level and suction pressure.
Figure 1: System conguration ICAD
Separator on ooded evaporator
Modulating control and the valve’s large capacity range ensure a stable level - even under conditions of quickly
changing loads.
Figure 2: System conguration AKV/A
Intermediate cooler
The level transmitter’s wide measuring range enables it to monitor the liquid at all levels of the reservoir - and hence
to use the signal for safety functions in connection with the max. permissible level.
24 V AC ±20% 50 / 60 Hz or 24 V DC ±20% (the supply voltage is galvanically separated from the input and
output signals. Input/output are not individual galvanic isolated)
Power consumption
Controller
20 W coil for AKV or AKVA
15 VA / 10W
55 VA
Input signal
* Ri =
0(4) – 20mA: 33 ohm
0(2) – 10 V: 100 kohm
Relay for common alarm. Installer can choose between Normally Open (33-34) or Normally Closed (34-35) circuits. The relay
will switch according to the programmed setting
25-27
Relay for low level limit. Installer can choose between Normally Open (26-27) or Normally Closed (25-26) circuits. The relay will
switch when the set value is passed.
30-32
Relay for upper level limit. Installer can choose between Normally Open (30-31) or Normally Closed (31-32) circuits. The relay
will switch when the set value is passed.
The user interface of the control panel consists of a multiline display and 4 individual push buttons: Enter button,
Scroll up button, Scroll down button and Back button.
The gure shows the Home display image, which give the actual overview. This is the starting point for entering into
menus, and you will revert to this image by pushing 1 – 3 times (depending on actual position).
Display
Figure 9: Display
The display itself show the state of Liquid level, Controller Mode (controller On/O), Valve opening degree,
Lower level alarm (o = no alarm present) and Upper level alarm (o = no alarm present).
Example of alarm content. The list will be empty in normal operation as no alarm is active.
Level signal out of range
hours minutes **)
Standby mode
hours minutes **)
Detailed status
Controller state
Stop, Manual, Auto, Slave, IO **)
Actual level
0.0 – 100% **)
Actual reference
0.0 – 100% **)
Actual OD
0.0 – 100% **)
Digital input status
On /
O **)
Actual level signal current
mA **)
Oscillation amplitude
0.0 – 100% **)
Oscillation period
sec **)
Controller Info
Type
**)
Name (Controller name)
**)
SW (Software version)
**)
Bios (Bios version)
**)
Adr (Controller address)
**)
SN (Serial Number)
**)
PV (Product version)
**)
Site (Production site)
**)
QR code
Code
**)
Liquid level controller, Type EKE 347
Additional to the external connected alarm audio/video sources, a Bell symbol will ash in the upper right corner in
case of an alarm.
To see more details on system performance and setting of parameters, 2 dierent main menu levels can be reached
by operation of the push buttons.
From Home image the Status menu can be reached by 1 push on Enter. From Home image the Setup & servicemenu can be reached by 1 push and hold on Enter. For entrance a Log In is required by the password given during
Commisioning.
Menus
Status menu
To enter Status menu from Home image: Push once.
Figure 10: Status menu
The Status menu is an open menu accessible for all. Therefore only 1 parameter can be changed from here. A
selection of other parameters can be seen from the status menu.
Table 8: Status menu ( Open menu )
NOTE:
*) Read & write
**) Write only
Setup & service menu (Requires log-in password assigned in Commisioning menu)
To enter Setup and service menu from Home image: Push and hold
When detecting an alarm from external sources or the ashing bell in the display, the alarm description can be
found as a text message in the Status menu under Active alarms.
Both alarms and errors will be shown here. If more alarms/errors occur simultaneously, they will be shown as
subsequent text lines.
When morecontrollers areconnected viaCAN bus eachend of the bus must beterminated with a jumperbetween 15 and 16.
Liquid level controller, Type EKE 347
Table 11: Errors:
MASTER / SLAVE conguration
Figure 12: MASTER / SLAVE conguration
Multivalve
If the system capacity requires more than one control valve; up to three valves can be controlled simultaneously in a
Master/Slave conguration, where the master and each slave controls one valve respectively.
EKE 347 IO cong menu - Multiple valve setup - with one of these options:
• 2 valves with same capacity
• 2 valves with dierent capacity
• 3 valves with same capacity
• 3 valves with dierent capacity
Additionally the master must be programmed in IO cong menu - Multiple valve pattern - for either:
• Valves in parallel (valves regulate simultaneously) or
• Valves sequential (mainly one valve regulating at any time)
See principle below.
The slave EKE’s only need identication of Slave and valve CAN ID (communication menu).
Two identical v alves (Parallel)Two identical v alves (Sequential)
Danfoss
80Z8114
AKS 4100/
AKS 4100U
Danfoss
M84H0084_1
MASTER
I/O
AKVA
(ICAD)
R120
CAN H
CAN L
GND
15 16 17 18
R120
CAN H
CAN L
GND
15 16 17 18
Jumper
15-16
Jumper
15-16
D02
D03
D01
NC 2
C 2
NO 2
NC 3
C 3
NO 3
NO 1
C 1
NC 1
Liquid level controller, Type EKE 347
Figure 13: Valves in parallel and Valves sequential
The default display of the master EKE will show the standard information together with a symbol of multiple valves
and the actual total opening degree (see below).
The default display of the slave EKE will show the actual liquid level (as the master), symbol of multiple valves, actual
total opening degree and the opening degree of the individual valves involved (see below).
I/O conguration
Figure 14: I/O conguration
Remote display
The daily operation can be set up directly on the controller or via an external display device.
Alarm on the external display - MMIGRS2
If the communication to the display is not carried out correctly, it will send an “ERR31” error notication. This may be
caused by the displayed terminations not being installed, or that there have been interruptions in data
communication during the time when the display retrieves the basic information from the controller. Once the
terminations have been inspected, you should then check the software version of the external display. This is done
by holding down the Enter key and the X key for 5 seconds, until the Bios menu appears. Next, press the X key and
read o the software version in the bottom right corner. The software version must be 1.13 or newer.
Once the display’s software version has been checked, check the display’s settings as follows:
1.
Hold the Enter key and the X key down for 5 seconds, until the Bios menu appears
2.
Select the “MCX selection” menu
2.1.
Select the “Clear UI” line and press Enter
2.2.
Select the “Autodetect” line and press Enter
3.
Press the X key to return to the Bios menu
4.
Select the “COM selection” menu
4.1.
Select the “CAN” line and press Enter
5.
Press the X key to return to the Bios menu
6.
Select the “Start up mode” menu
6.1.
Select the “Remote application” line and press Enter
7.
Press the X key to return to the Bios menu
8.
Select the “CAN” menu
8.1.
Select the “Baudrate” line and then select the “Autobaud” setting and press Enter
8.2.
Select the “Node ID” line and set the value to 126 and press Enter
9.
Press the X key to return to the Bios menu
10.
Select the “Application” menu and press Enter
NOTE:
The display will once again retrieve data from the controller. This process will take about 5 minutes.
EU Low Voltage Directive and EMC demands re CE-marking complied with.
LVD-tested acc. to EN 60730-1 and EN 60730-2-9
EMC-tested acc. to EN61000-6-3 and EN 61000-6-2
UL le E31024
Liquid level controller, Type EKE 347
Certicates, declarations, and approvals
The list contains all certicates, declarations, and approvals for this product type. Individual code number may have
some or all of these approvals, and certain local approvals may not appear on the list.
Some approvals may change over time. You can check the most current status at danfoss.com or contact your local
Danfoss representative if you have any questions.
Danfoss oers a wide range of support along with our products, including digital product information, software,
mobile apps, and expert guidance. See the possibilities below.
The Danfoss Product Store
The Danfoss Product Store is your one-stop shop for everything product related—no matter where
you are in the world or what area of the cooling industry you work in. Get quick access to essential
information like product specs, code numbers, technical documentation, certications, accessories,
and more.
Start browsing at store.danfoss.com.
Find technical documentation
Find the technical documentation you need to get your project up and running. Get direct access to
our ocial collection of data sheets, certicates and declarations, manuals and guides, 3D models
and drawings, case stories, brochures, and much more.
Start searching now at www.danfoss.com/en/service-and-support/documentation.
Danfoss Learning
Danfoss Learning is a free online learning platform. It features courses and materials specically
designed to help engineers, installers, service technicians, and wholesalers better understand the
products, applications, industry topics, and trends that will help you do your job better.
Create your Danfoss Learning account for free at www.danfoss.com/en/service-and-support/learning.
Get local information and support
Local Danfoss websites are the main sources for help and information about our company and
products. Find product availability, get the latest regional news, or connect with a nearby expert—all
in your own language.
Find your local Danfoss website here: www.danfoss.com/en/choose-region.
Spare Parts
Get access to the Danfoss spare parts and service kit catalog right from your smartphone. The app
contains a wide range of components for air conditioning and refrigeration applications, such as
valves, strainers, pressure switches, and sensors.
Download the Spare Parts app for free at www.danfoss.com/en/service-and-support/downloads.
Coolselector®2 - nd the best components for you HVAC/R system
Coolselector®2 makes it easy for engineers, consultants, and designers to nd and order the best
components for refrigeration and air conditioning systems. Run calculations based on your operating
conditions and then choose the best setup for your system design.
Download Coolselector®2 for free at coolselector.danfoss.com.
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its
products without notice. This also applies to products already on order provided that such alterations can be made without subsequential
changes being necessary in specications already agreed. All trademarks in this material are property of the respective companies. Danfoss and
the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.