2
Capacity
controller RS8ER302 © Danfoss 2016-02
AK-CH
650
Contents
1. Introduction .............................................................................3
Application .................................................................................................. 3
Principles .............................................................................................. 4
2. Design of a controller ..............................................................7
Module survey ........................................................................................... 8
Common data for modules .................................................................10
Controller ...........................................................................................12
Extension module AK-XM 101A .................................................14
Extension module AK-XM 102A / AK-XM 102B .....................16
Extension module AK-XM 103A .................................................18
Extension module AK-XM 204A / AK-XM 204B .....................20
Extension module AK-XM 205A / AK-XM 205B .....................22
Extension module AK-OB 110 ....................................................24
Extension module AK-OB 101A..................................................25
Extension module EKA 163B / EKA 164B ................................26
Power supply module AK-PS 075 / 150 ...................................27
Preface to design ....................................................................................28
Functions ............................................................................................28
Connections ......................................................................................29
Limitations .........................................................................................29
Design of a compressor and condenser control .........................30
Procedure: ..........................................................................................30
Sketch ..................................................................................................30
Compressor and condenser functions ....................................30
Connections ......................................................................................31
Planning table ..................................................................................33
Length .................................................................................................34
Linking of modules .........................................................................34
Determine the connection points ............................................35
Connection diagram ......................................................................36
Supply voltage .................................................................................37
Ordering .....................................................................................................38
3. Mounting and wiring .............................................................39
Mounting ...................................................................................................40
Mounting of analog output module ........................................40
Mounting of extension module on the basic module .......41
Wiring ..........................................................................................................42
4. Configuration and operation ................................................45
Configuration ...........................................................................................47
Connect PC ........................................................................................47
Authorization ....................................................................................48
System setup ....................................................................................50
Set plant type ...................................................................................51
Set control of compressors ..........................................................52
Setup control of condenser .........................................................55
Setup Display ....................................................................................57
Setup defrost ....................................................................................58
Setup general alarm inputs .........................................................59
Setup separate thermostat functions ......................................60
Setup separate voltage functions .............................................61
Configuration of inputs and outputs .......................................62
Set alarm priorities..........................................................................64
Lock configuration ..........................................................................66
Check configuration .......................................................................67
Check of connections ............................................................................69
Check of settings.....................................................................................71
Schedule function ..................................................................................73
Installation in network ..........................................................................74
First start of control ................................................................................75
Check alarms .....................................................................................75
Start the control ...............................................................................76
Manual capacity control ...............................................................77
Manual defrost .........................................................................................78
5. Regulating functions .............................................................79
Suction group ..........................................................................................80
Capacity control of compressors ...............................................80
Reference for compressor control .....................................81
Capacity distribution methods ...........................................82
Power pack types – compressor combinations ............82
Load shedding ..........................................................................87
Liquid injection in suction line ...........................................88
Heat exchanger injection .....................................................88
Defrost .................................................................................................89
Safety functions ...............................................................................90
Pump control ....................................................................................92
Condenser .................................................................................................93
Capacity control of condenser ...................................................93
Reference for condensing pressure ..........................................94
Capacity distribution .....................................................................95
Step regulation ........................................................................................95
Speed regulation ....................................................................................95
Condenser couplings .....................................................................96
Safety functions for condenser ..................................................96
General monitoring functions ...........................................................97
Miscellaneous ..........................................................................................98
Appendix A – Compressor combinations and coupling pat-
terns ...........................................................................................................101
Appendix B - Alarm texts ...................................................................108
Appendix C - ..........................................................................................110
Recommended connection ..............................................................110
