Product Overview

© Danfoss | DCS | 2019.04
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C
DKRCC.PD.RS0.A4.02 | 2
Table of content
1.0 Ordering 3
1.1 Hardware comparison 3
1.2 Product label and Identication 3
1.3 Dimensions: EKE 1A, EKE 1B, EKE 1C 4
1.4 EKE range 4
2.0 EKE superheat Controller Tools 5
2.1 Accessories 6
3.0 Main features overview 7
3.1 Hardware 7
3.2 Software 8
3.3 Typical features used in various applications 9
4.0 Specication 10
4.1 General specication 10
4.2 Electrical specication 10
4.3 Inputs / outputs 11
5.0 Connection 12
5.1 EKE 1A connection overview 13
5.2 EKE 1B connection overview 14
5.3.1 EKE 1C - Front board connection overview 15
5.3.2 EKE 1C - Back board connection overview 16
6.0 Installation 17
6.1 General installation 17
6.2 Sensor mounting 17
6.2.1 Temperature sensor 17
6.2.2 Pressure transmitter mounting 17
6.2.3 Sharing pressure sensor 17
6.2.4 Pressure/ Temperature signal sharing in EKE 1C via CanBus 18
6.2.5 Using external signal values via communication 18
6.2.6 Signal sharing groups 18
6.3 Sensor Correction 18
6.4 Shared input signal 18
6.5 Shared DI inpots 19
6.6 Sharing power supply and battery back up 19
6.7 Cabling 20
6.7.1 Cable length 20
7.0 Stepper motor valve 21
7.1 Danfoss valve connection 21
7.2 Stepper motor valve parameters 22
7.3 Useful Valve parameters for various application 24
8.0 Modbus communication 25
8.1 Modbus RTU setting 25
8.2 Addressing convension 25
8.3 RS485 bus function codes overview 26
8.4 Example: MODBus communication 26
9.0 User interface: Display MMIGRS2 27
9.1 Connection 27
9.2 Main screen 28
9.3 Display Units and Password 28
9.4 Factory re-setting of display 28
10.0 Wizard set up 30
11.0 User interface KoolProg 31
11.1 Setting up 32
11.2 Main Screen 32
11.3 Service Menu 33
11.4 Graph- Datalogger 33
12.0 Conguration 34
12.1 Quick guide for parameter selection 34
12.2 Before starting controller checklist 35
12.3 First Start up 36
13.0 EKE Application 37
13.1 Driver 37
13.2 Controller 38
14.0 Driver mode 39
14.1 Using Analog signal 39
14.2 Using Communication bus 39
15.0 Manual Mode 40
15.1 Manual OD from preset parameter via DI 40
15.2 Manual control of Relay 40
15.3 Manual control Valve 40
15.4 Manual Homing 40
15.5 Switching between Auto and manual mode 41
16.0 Temperature control 42
16.1 ON/OFF thermostat 42
16.2 Modulating thermostat (MTR) 43
17.0 Superheat reference calculation methods 45
17.1 Comparison between SH reference 45
17.2 MSS 46
17.3 Fixed reference 47
17.4 Load AP 47
17.5 Delta temperature reference 48
18.0 SH or Temp. Reference via External signal 49
18.1 SH reference 49
18.2 Temperature reference 49
18.3 Compressor feed forward SH reference 50
19.0 General Limiter 51
19.1 Priority of limiters 51
19.2 Superheat close 52
19.3 Lowest Operating Pressure (LOP) 52
19.4 High condensing temperature protection 53
19.5 Min. S4 / leaving media 54
19.6 Maximum Operating Pressure (MOP) 55
20.0 Start up 56
20.1 P - Control 56
20.2 Start OD with protection 56
20.3 Fixed OD and time 56
21.0 Defrost Sequence 57
22.0 Reversible systems, dual setting of control parameters 58
23.0 Fail safe operation 59
24.0 Service Mode 60
25.0 Alarms 61
25.1 Actions following analarm 61
25.2 Lack of valve capacity Alarm 61
25.3 Superheat Alarm 61
26.0 Alarm and error table 62 - 65
27.0 Trouble shooting 66 - 70
Appendix 1 Acronyms and abbreviations. 71
Appendix 2 General comparision between
AKS and NSK Pressure transmitter 71
Appendix 3 MMIGRS2 Display setting 72
Appendix 4 Dening new refrigerant 72
Appendix 5 Flammable application 73
Appendix 6 Factory Reset 73
Appendix 7 Overdrive enable 74
Appendix 8 Typical applications with 75
A. Chiller (cooling only) 75
B. Reversible chillers (Air to water) 75
C. Reversible heat pump 76
D. A/C air handler 77
E. Cold room 77
F. Multi evaporator 77
Appendix 9 Parameters List Explanations 78 - 83
User interface module MMIGRS2 84 - 85
Gateway MMIMYK 86 - 87
Transformers ACCTRD 88
Transformers AK-PS 89
Probe ACCPBT 90
Cable ACCCBI 91