1 - SAFETY CONSIDERATIONS ............................................................................................................................................... 4
1.1 - General ................................................................................................................................................................................ 4
1.2 - Avoiding electrocution ........................................................................................................................................................ 4
2 - GENERAL DESCRIPTION .................................................................................................................................................... 4
2.1 - General ................................................................................................................................................................................. 4
2.2 - Abbreviations used .............................................................................................................................................................. 4
3 - HARDWARE DESCRIPTION ................................................................................................................................................ 5
3.1 - General ................................................................................................................................................................................. 5
3.2 - Electronic boards ................................................................................................................................................................. 5
3.3 - The controls ........................................................................................................................................................................ 6
3.4 - User connections .................................................................................................................................................................. 8
4 - SETTING UP PRO-DIALOG PLUS CONTROL................................................................................................................. 9
4.1 - Local interface general features ........................................................................................................................................... 9
4.2 - Unit start/stop control ........................................................................................................................................................ 10
4.3 - Menus ................................................................................................................................................................................. 11
4.4 - General menu structure ...................................................................................................................................................... 12
4.5 - Menu tree structure ............................................................................................................................................................ 13
5 - PRO-DIALOG PLUS CONTROL OPERATION ............................................................................................................... 27
5.1 - Start/stop control ................................................................................................................................................................ 27
5.2 - Heating/cooling selection .................................................................................................................................................. 27
5.3 - Evaporator water pump control ......................................................................................................................................... 28
5.4 - Condenser water pump control .......................................................................................................................................... 28
5.5 - Control interlock contact ................................................................................................................................................... 28
5.6 - Evaporator heater control .................................................................................................................................................. 28
5.7 - Control point ...................................................................................................................................................................... 28
5.8 - Demand limit ..................................................................................................................................................................... 29
5.9 - Limiting the unit running current ...................................................................................................................................... 29
5.10- Capacity control ................................................................................................................................................................ 29
5.11 - Determining the lead circuit ............................................................................................................................................ 29
5.12 - Circuit loading sequence ................................................................................................................................................. 29
5.13 - Compressor start-up sequence in one circuit ................................................................................................................... 29
5.14 - EXV control ..................................................................................................................................................................... 29
5.15 - Motor cooling valve control ............................................................................................................................................ 30
5.16 - Head pressure control on air-cooled units ....................................................................................................................... 30
5.17 - Head pressure control on water-cooled units ................................................................................................................... 30
5.18 - Head pressure setpoint selection ...................................................................................................................................... 30
5.19 - High pressure load shedding function ............................................................................................................................. 30
5.20 - High current load shedding function ............................................................................................................................... 30
5.21 - Start-up procedure - prelubrication .................................................................................................................................. 30
5.22 - Master/slave assembly ..................................................................................................................................................... 30
5.23 - Controlling Pro-Dialog Plus units with a System Manager ............................................................................................ 31
5.24 - Optional heat reclaim module .......................................................................................................................................... 31
6 - DIAGNOSTICS - TROUBLESHOOTING.......................................................................................................................... 32
6.1 - General ............................................................................................................................................................................... 32
6.2 - Displaying alarms .............................................................................................................................................................. 32
6.3 - Resetting alarms ................................................................................................................................................................ 32
6.4 - Alarm codes ....................................................................................................................................................................... 33