Riello NXC 021 - English

53
Contents
EN
Certainpartsofthebookletmakeuseofthefollowing
symbols:
 ATTENTION=foractivitiesthatrequireparticularcau-
tionandsuitablepreparation.
PROHIBITION = for activities that must not be perfor-
medunderanycircumstances.
This bookletCode Doc-0081178rev. 3 01/2017consists of 104
pages.
Contents
1. General information
1.1 Generalwarnings .................54
1.2 Essentialsafetyregulations ..........54
1.2.1 Fireandexplosion ................54
1.2.2 Vibration .......................55
1.2.3 Water connections ................55
1.2.4 Recommendations ................55
1.2.5 Liquidrefrigerantcharge ............55
1.3 Descriptionoftheequipment ........56
1.4 Safetyandadjustmentdevices ........57
1.5 Identication ....................57
1.6 Structure .......................58
1.7 Technical specifications .............59
1.8 Operation limits ..................60
1.9 Waterflowrate ...................60
1.10 Ethyleneglycolsolutions ............60
1.11 Residualhead ....................61
1.12 Coolingcircuitandprobepositioning ...61
2. Installation
2.1 Uponreceivingtheproduct ..........63
2.2 Label positioning .................63
2.3 Dimensionsandweight .............64
2.4 Handlingandunpacking ............64
2.5 Installation SITE ..................66
2.5.1 Recommendeddistances ............66
2.6 Positioning ......................67
2.7 Installationonoldsystemsorsystems
inneedofupgrading ..............67
2.8 Sourcewatersystems ..............67
2.9 Hydraulicconnections ..............68
2.9.1 Connectiondiagrams ...............69
2.10 Chargingandemptyingthesystems ....70
2.10.1 Waterqualityrequirements ..........70
2.10.2 Chargingthesystem ...............70
2.10.3 Emptyingtheequipment ............71
2.11 Electricconnectionsanddiagrams .....72
2.11.1 Electricaldata ....................73
2.11.2 Control panel access ...............74
2.11.3 Connectionstobeperformedbythe
installer ........................75
3. PRO-DIALOG+ control panel
3.1 Safetywarnings ..................76
3.2 Description of the control panel .......76
3.3 Drycontacts .....................78
3.4
Pro-Dialog + interface ............78
3.4.1 Structure of the Pro-Dialog + menu ....80
3.4.2 Detaileddescriptionofthemenus .....81
3.5 Checkoperations .................89
3.5.1 Startandstopcontrols .............89
3.5.2 Operatingmodeandparameters ......89
3.5.3 Heating/cooling/stand-bymode ......90
3.5.4 Pump control ....................91
3.5.5 Control point ....................91
3.5.6 Active setpoint ...................91
3.5.7 Reset ..........................91
3.5.8 Demandlimitation ................91
3.5.9 Capacitycontrol ..................91
3.5.10 Nightmode .....................92
3.5.11 Control of optional electric heating
elements .......................92
3.5.12 Desuperheater option ..............92
3.5.13 Defrost function ..................92
3.5.14 Controlofanauxiliaryboiler .........92
3.5.15 Master/Slave unit .................92
4. Commissioning
4.1 Preparationtorstcommissioning .....93
4.2 First commissioning ...............93
4.3 Checkstobeperformedafterrst
commissioning ...................93
4.4 Shutdownforextendedperiods .......94
4.5 Temporaryshutdown ...............94
5. Maintenance
5.1 Standardmaintenance .............95
5.1.1 Maintenance level 1 ................95
5.1.2 Maintenance level 2 ...............95
5.1.3 Maintenance level 3 ...............95
5.2 Airexchanger ....................96
5.3 Waterheatexchangermaintenance ....96
5.4 Unit maintenance .................96
5.5 Refrigerant volume ................96
6. Alarm codes
6.1 Alarm menu .....................97
6.2 Alarm reset ......................97
6.3 Alarmcodes .....................97
7. Disposal
7.1 Disposal ........................100