General notes .......................................................................................................................................... 2

1.2

Safety and applied symbols .................................................................................................................... 3

1.2.1 Norms and Regulations ................................................................................................................................... 3

1.3

Product guide .......................................................................................................................................... 4

1.3.1 Classification of water chiller models .............................................................................................................. 4

1.3.2 Product guide: Water chillers........................................................................................................................... 4

Control Functions ...................................................................................................... 5

2.1

Control functions on the module.............................................................................................................. 6

2.1.1 Water control ................................................................................................................................................... 9

2.1.2 Water temperature control ............................................................................................................................. 10

2.1.3 Compressor Control ...................................................................................................................................... 13

2.1.4 Control for recovery from power interruption (Option) ................................................................................... 15

2.1.5 Prevention of simultaneous startup ............................................................................................................... 16

2.1.6 Reverse prevention control ........................................................................................................................... 16

2.1.7 Control for prevention of wrong operation and wrong settings ...................................................................... 17

2.1.8 Demand control ............................................................................................................................................. 17

2.1.9 Forced load up capacity control from external signal .................................................................................... 21

2.1.10 2-temperature setting function ..................................................................................................................... 22

2.1.11 External thermo operation from external contact ......................................................................................... 23

2.1.12 Water Temperature of the Control Target .................................................................................................... 25

2.1.13 Operation from DC24V contact input .......................................................................................................... 26

2.1.14 Thermo OFF function selection ................................................................................................................... 31

2.1.15 Selection of enabling/disabling of alarm release by means of remote stop ................................................ 32

2.1.16 Limitation setting for pump feedback waiting time ....................................................................................... 33

2.1.17 Inlet water temperature thermo OFF function ............................................................................................. 34

2.2

Control of the cooling cycle ................................................................................................................... 36

2.2.1 Compressor Control ...................................................................................................................................... 36

2.2.2 Expansion Valve Control ............................................................................................................................... 37

2.2.3 Overcurrent protection control ....................................................................................................................... 39

2.3

Control of Master/Slave group............................................................................................................... 40

2.3.1 Summary of control of Master/Slave group ................................................................................................... 40

2.3.2 Setting method .............................................................................................................................................. 40

2.3.3 Operation method .......................................................................................................................................... 41

2.3.4 Other functions of the control of Master/Slave group .................................................................................... 43

2.3.5 Setting items .................................................................................................................................................. 44

2.3.6 Method for setting and confirmation of operation conditions through the LCD screen .................................. 46

2.4

Run operation ........................................................................................................................................ 48

III

SMGB0120 rev.0 - 11/2017