Danfoss AK-PC 772A User Manual

2 Capacity controller RS8HF102 © Danfoss 2017-07 AK-PC 772A
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-XM 208C ................................................24
Extension module AK-OB 110 ....................................................26
Extension module EKA 163B / EKA 164B / EKA 166 ............ 27
Graphic display MMIGRS2 ............................................................ 27
Power supply module AK-PS 075 / 150 / 250 ........................ 28
Communication module AK-CM 102 ....................................... 29
Preface to design ....................................................................................30
Functions ............................................................................................30
Connections ...................................................................................... 31
Limitations ......................................................................................... 31
Design of a compressor and condenser control .........................32
Procedure: ..........................................................................................32
Sketch .................................................................................................. 32
Compressor and condenser functions ....................................32
Connections ...................................................................................... 33
Planning table ..................................................................................35
Length ................................................................................................. 36
Linking of modules .........................................................................36
Determine the connection points ............................................37
Connection diagram ...................................................................... 38
Supply voltage ................................................................................40
Ordering ..................................................................................................... 41
3. Mounting and wiring .............................................................43
Mounting ................................................................................................... 44
Mounting of analog output module ........................................44
Mounting of extension module on the basic module .......45
Wiring ..........................................................................................................46
4. Configuration and operation ................................................49
Configuration ...........................................................................................50
Connect PC ........................................................................................ 50
Authorization ....................................................................................52
Unlock the configuration of the controllers .......................... 53
System setup ....................................................................................54
Set plant type ...................................................................................55
Set control of MT compressors ...................................................56
Set control of LT compressors .....................................................60
Setup control of condenser fans ...............................................61
Setup control of high pressure ...................................................63
Setup control of receiver pressure ............................................ 64
Setup control of heat recovery..................................................65
Setup Display ....................................................................................66
Setup Functions for General purpose ......................................67
Separate thermostat...............................................................68
Separate pressostat ................................................................68
Separate voltage signal ......................................................... 69
Separate alarm inputs ............................................................69
Separate PI function ...............................................................70
Configuration of inputs and outputs ....................................... 71
Set alarm priorities..........................................................................73
Lock configuration ..........................................................................75
Check configuration .......................................................................76
Check of connections ............................................................................78
Check of settings.....................................................................................80
Schedule function ..................................................................................82
Installation in network .......................................................................... 83
First start of control ................................................................................ 84
Start the control ...............................................................................85
Manual capacity control ............................................................... 86
5. Regulating functions .............................................................87
Suction groups ........................................................................................88
Controlling sensor...........................................................................88
Reference ...........................................................................................88
Capacity control of compressors ............................................... 89
Capacity distribution methods ...........................................90
Power pack types – compressor combinations ............ 91
Compressor timers .................................................................. 95
Compressor with variable capacity ...................................96
Load shedding .......................................................................... 97
Injection ON ..............................................................................97
Liquid injection in common suction line ........................ 98
Safety functions ............................................................................... 98
Condenser / Gas cooler ......................................................................100
Capacity control of condenser .................................................100
Reference for condensing pressure ........................................100
Heat recovery .................................................................................102
Capacity distribution ...................................................................104
EC motor ...........................................................................................104
Step regulation .......................................................................104
Speed regulation ...................................................................104
Condenser couplings ...........................................................105
Safety functions for condenser.........................................105
Circuits for control of CO2 gas pressure ................................106
Receiver control .....................................................................107
Parallel compression ............................................................108
General monitoring functions .........................................................109
Miscellaneous ........................................................................................111
Appendix - Alarm texts .......................................................................116

Danfoss AK-PC 772A Specifications

General

Brand	Danfoss
Model	AK-PC 772A
Category	Controller
Language	English