EVCO c-pro nano CHIL - Manual (Page 4)

C-PRO NANO CHIL AND C-PRO MICRO CHIL – APPLICATION MANUAL
Pag. 4
6.2.5 Single-circuit motocondensing water-based units................................................................................ 87
6.2.6 Twin-circuit air-to-air units .................................................................................................................. 88
6.2.7 Twin-circuit air-to-water units ............................................................................................................. 90
6.2.8 Twin-circuit water-to-water units......................................................................................................... 92
6.2.9 Twin-circuit motocondensing air-based units ...................................................................................... 94
6.2.10 Twin-circuit motocondensing water-based units.................................................................................. 96
6.3 Configuration of Circuits ............................................................................................................................... 98
6.4 Operating Mode Control................................................................................................................................ 99
6.4.1 Heat-pump-only mode ....................................................................................................................... 100
6.4.2 Geothermal heat pumps...................................................................................................................... 100
6.5 Compressor Regulation ............................................................................................................................... 101
6.5.1 Lateral-band (LB) regulation ............................................................................................................ 101
6.5.2 Neutral-zone (NZ) regulation............................................................................................................. 102
6.5.3 Compressor activation from digital input........................................................................................... 103
6.6 Compressor Management ............................................................................................................................ 104
6.6.1 Compressor statuses ........................................................................................................................... 104
6.6.2 Rotation of compressors..................................................................................................................... 104
6.6.3 Pump-down switch-OFF procedure ................................................................................................... 105
6.6.4 Relative-threshold pump-down .......................................................................................................... 105
6.6.5 Protection timings .............................................................................................................................. 106
6.6.6 Thermal protection inputs .................................................................................................................. 107
6.7 Condensation Regulation............................................................................................................................. 108
6.7.1 Fan linear regulation .......................................................................................................................... 108
6.7.2 Condensing valve regulation .............................................................................................................. 110
6.7.3 Condensing fan pre-start at high external temperatures ..................................................................... 110
6.7.4 Single condensation ........................................................................................................................... 110
6.8 Fan Management ......................................................................................................................................... 111
6.8.1 Fan status ........................................................................................................................................... 111
6.8.2 Fan timings......................................................................................................................................... 111
6.8.3 Thermal Protection Inputs.................................................................................................................. 111
6.9 Circulating Pump Management ................................................................................................................... 112
6.9.1 Pump Status........................................................................................................................................ 113
6.10 Internal Fan Management ............................................................................................................................ 113
6.10.1 Hot-start function ............................................................................................................................... 113
6.10.2 Recirculating fan status ...................................................................................................................... 114
6.11 Flow Meter Management............................................................................................................................. 114
6.12 Defrosting Management .............................................................................................................................. 116
6.12.1 Defrosting management via external contact ..................................................................................... 117
6.12.2 Defrosting cycle compensation .......................................................................................................... 117
6.12.3 Defrosting heating coil ....................................................................................................................... 118
6.13 Anti-frost management / Chilling-support heating coils.............................................................................. 118
6.14 Free-Cooling Management .......................................................................................................................... 119
6.14.1 Free-Cooling Enable .......................................................................................................................... 119
6.14.2 Free-cooling regulation ...................................................................................................................... 119
6.14.3 Free-cooling control valves ................................................................................................................ 121
6.15 Temperature Alarm Control ........................................................................................................................ 122
6.15.1 Low and high temperature alarm management .................................................................................. 122
6.15.2 Management of primary exchanger efficiency alarm......................................................................... 122
6.16 Pressure Alarm Control ............................................................................................................................... 123
6.16.1 Management of high-pressure pressure-switch alarm ........................................................................ 123
6.16.2 Management of high-pressure transducer alarm ................................................................................ 123
6.16.3 Management of low-pressure pressure-switch alarm (chiller mode) ................................................. 123
6.16.4 Management of low-pressure transducer alarm (heat pump mode) ................................................... 123
6.16.5 Low start-up pressure alarm............................................................................................................... 124
6.17 Miscellaneous Management ........................................................................................................................ 125
6.17.1 Set point variation .............................................................................................................................. 125
6.17.2 External probe configuration (AI04 / AI05)....................................................................................... 125
6.17.3 Evaporation-probe configuration ....................................................................................................... 126
6.17.4 Dynamic set point .............................................................................................................................. 126
6.17.5 Forced shutdown ................................................................................................................................ 127
6.17.6 Power limiting.................................................................................................................................... 128
6.17.7 High-pressure partialisation at high temperatures (chiller) ................................................................ 128