Product Overview

© Danfoss | DCS | 2019.04
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C
DKRCC.PD.RS0.A4.02 | 35
12.2 Before starting
controller checklist
When the electric wires have been connected to the controller. the following points have to be
attended to before the regulation starts:
Before using EKE controller, there are compulsory settings that have to be made for each individual
application.
If DI ON/OFF function has been used as a Injection control ON/OFF, then the interaction between
internal and external start / stop function is as shown on the following table:
Functions Features
R012 - Main switch OFF OFF ON ON
External Start/stop (DI) OFF ON OFF ON
Results
Conguration monitoring (eg. S2 not dened) available available available available
Application monitoring (eg. Low SH) not available available not available available
Sensor monitoring (Eg. S2 Error) available not available not available available
Valve OD% 0% 0% 0% Auto, 0-100%
Interaction between internal
and external start/stop
functions and active
functions
Note:
Wizard only takes main
parameters into consideration.
Other required features and
fuctions need to be set
separately.
WARNING!
Wrong selection of refrigerant
may cause damage to the
compressor.
The wizard will guide user to create a parameter settings for a new application/projects in an
easier way. The wizard will ask user multiple questions on the application and the components
intended to be used with EKE. When user is done with wizard, a new set of best suitable
parameters are created according to options the user has chosen. R012 main switch is always OFF
when running the wizard.
Wizard
Refrigerant type
It is possible to choose from a list of 42 dierent refrigerants in the controller.
If the refrigerant is not found on the list, it is possible to enter the Antione constants for the unlisted
refrigerant using communication bus / MMIGRS2 display/KoolProg software tool. See Appendix for
detail.
Valve type
It is important to select the right valve type as listed under Valve denition. The guide line for the
valve selection is described in section Stepper motor valve.
EKE 1A and EKE 1B only support NTC 10K temperature sensor, whereas EKE 1C supports both NTC as
well as PT1000 sensor type. The default Sensor conguration is 'non' in EKE 1C controllers. User
must select the right temperature sensor type for all relevent sensor positions from the list.
If a temperature sensor has an oset, it must be corrected before use. Such oset correction is stored
in EEPROM of EKE controller.
Temperature sensor
Note:
EKE also accepts external signal
value like Po, Pe, S2, S3 and S4
viacommunication bus. For
detail check the section ''Using
external sensor values
Various Danfoss pressure transmitter can be selected from pre congured list. For transmitter that are
not covered by the default list, a complete set of parameter must be dened as specied in parameter
list under section Pressure sensor conguration.
Once the pressure transmitter is dened, the range of the pressure transmitter can be set by entering
the transmitter’s minimum and maximum values for the parameter as shown below in table.
It is important to note that the right compatible pressure transmitter must be selected with respect to
EKE version and connected to the proper terminals as per the application need.
Similar to the temperature sensor, if the pressure transmitter has an oset, then it must be corrected.
The software correction is done through the parameters as described in Pressure sensor
conguration.
All Pressure Transmitters must be congured with a range. And the Pressure values must
be dened in bar Gauge.
Note:
Pressure transmitter having
oset will result in inaccurate
control, hence sensors with
oset must be corrected
using Oset Correction
through parameter R107 or
R108.
Pressure value must be
entered in Bar Gauge.
Pressure transmitter