CONTENTS
1.1.
General functions
...................................................................................................................................................................................3
1.2 Main characteristics
.....................................................................................................................................................................................3
2.1 Buttons - LEDs - Icons
..................................................................................................................................................................................5
2.2 LED display and Icons
..................................................................................................................................................................................6
3.1.
Starting for the first time
.......................................................................................................................................................................6
3.2.
Unit configuration
..................................................................................................................................................................................6
3.2.1.
Input configuration
................................................................................................................................................................................7
3.2.2.
Unit ON/OFF
.........................................................................................................................................................................................7
3.3.
Meaning of the inputs / outputs
..........................................................................................................................................................7
3.3.1.
Table of analogue inputs
........................................................................................................................................................................7
3.3.2.
Wiring diagrams:
..................................................................................................................................................................................8
4.1.
General settings
......................................................................................................................................................................................9
4.2.
Compressor rotation
..............................................................................................................................................................................9
4.3.
Compressor control
...............................................................................................................................................................................9
4.4.
Number of compressors started with probe 1 fault
......................................................................................................................11
4.5.
Compressors with different capacities
.............................................................................................................................................11
4.5.1.
Proportional band control with different capacity compressors
.................................................................................................................11
4.5.2.
Dead band control with different capacity compressors
...........................................................................................................................11
4.5.3.
Example of compressors with different capacities
...................................................................................................................................11
4.6.
Manually enable/disable the compressors
......................................................................................................................................12
4.7.
Special MT-LT units
.............................................................................................................................................................................12
4.7.1.
Management of compressor racks with LT and MT circuits and condenser only.
........................................................................................12
4.7.2.
Probes and values controlled
................................................................................................................................................................12
4.8.
Compressor time settings
..................................................................................................................................................................13
5.1.
Fan management
.................................................................................................................................................................................14
5.1.1.
Fan control
.........................................................................................................................................................................................14
5.2.
Dead band control
...............................................................................................................................................................................14
5.2.1.
5.1.2 Fan rotation
...............................................................................................................................................................................14
5.3.
Inverter management
..........................................................................................................................................................................15
5.4.
PWM-PPM management
.....................................................................................................................................................................17
5.5.
Floating condenser control
................................................................................................................................................................17
6.1.
Manual device operation
....................................................................................................................................................................18
6.2.
Compressor hour counter and maintenance alarm
......................................................................................................................18
6.3.
Set point variation from digital input
................................................................................................................................................18
6.4.
Type of refrigerant
...............................................................................................................................................................................18
6.5.
Auxiliary probe management
............................................................................................................................................................18
6.6.
Prevent high discharge pressure
......................................................................................................................................................18
1.
Product
......................................................................................................................................................................................................................................3
2
User interface
4
3.
Starting the unit
.....................................................................................................................................................................................................................6
4.
Compressor management
.................................................................................................................................................................................................9
5.
Fan and inverter management
...................................................................................................................................................................................... 14
6.
Various settings
...................................................................................................................................................................................................................18
Summary of Contents for mRack
Page 1: ...µRack Standard compressor racks single two circuit ...
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Page 37: ...µRack Cod CAREL 03P220431 rel 0 0 del 08 09 05 preliminary version 33 ...
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