MTA NGSi 05, Technical Manual, Page: 4 / 58

TECHNICAL MANUAL
- Contents
NGSi 05÷15
2
ENGLISH
EN
The data in this manual are not binding and they can be modified by the manufacturer without notice. Reproduction of this manual is strictly prohibited
9.8 Hydraulic pump operation .............................................................................................................18
9.8.1 Operation on call from temperature controller (Default) ..............................18
9.8.2 Operation on call from temperature controller with periodic activation .......19
9.8.3 Continuous operation .....................................................................................19
9.8.4 Pump proportional adjustment .......................................................................19
9.9 Heaters for antifreeze protection (if AK accessory is installed)....................................................20
9.10 Remote on-off and remote summer-winter switching ...................................................................20
9.11 Remote water temperature probe...................................................................................................20
9.12 Domestic hot water production enable ..........................................................................................20
9.12.1 Probe storage in heating mode .......................................................................21
9.12.2 Domestic hot water production call from digital input ..................................21
9.13 Domestic hot water accumulation in hot mode .............................................................................22
9.14 System backup heaters...................................................................................................................23
9.15 Systems backup heater in defrost mode.........................................................................................23
9.16 Domestic hot water backup heater.................................................................................................23
9.17 Backup heaters selection mode......................................................................................................23
9.18 Activation of backup and hot water tank heaters in joint operation mode/compressor replacement mode23
9.19 System season indication ...............................................................................................................30
9.20 Fan and dissipation control ............................................................................................................30
9.20.1 Ventilation control in chiller mode .................................................................30
9.20.2 Ventilation control in heating mode ...............................................................30
9.21 Defrost cycle ..................................................................................................................................31
9.22 Compressor crankcase heater.........................................................................................................31
9.23 Functions which can be enabled with Hi-T accessory...................................................................31
9.23.1 Screed function ...............................................................................................31
9.23.2 Disinfection (Legionella prevention) ..............................................................31
9.24 Handbook for installation configurations ......................................................................................31
9.25 Tables of settings which can be made by the user and installer ....................................................31
9.26 Alarms............................................................................................................................................38
9.26.1 Flow switch E06 ..............................................................................................38
9.26.2 High temperature E18 ....................................................................................38
9.26.3 Antifreeze E05 .................................................................................................38
9.26.4 Probe alarms ...................................................................................................38
9.26.5 Inverter timeout E80 .......................................................................................38
9.26.6 Remote ON/OFF E00 ......................................................................................38
9.26.7 High pressure E01 ..........................................................................................38
9.26.8 High pressure switch HP (in series with compressor delivery line probe) E64 38
9.26.9 Low pressure E02 ...........................................................................................38
9.27 No voltage......................................................................................................................................38
9.28 User cutout alarm table ..................................................................................................................38
Chapter 10
L
ENGTH SHUT
-
DOWNS
......................................................................................................................................39
Chapter 11
R
OUTINE CHECKS AND MAINTENANCE
............................................................................................................39
11.1 Environmental protection ..............................................................................................................40
Chapter 12
T
AKING THE UNIT OUT OF SERVICE
................................................................................................................40
Chapter 13
T
ECHNICAL DATA
.............................................................................................................................................40
Chapter 14
E
LECTRICAL DATA OF UNIT AND CONTROL DEVICES
.....................................................................................42
Chapter 15
H
EAT PUMP WORKING HEADS
..........................................................................................................................42
15.1 Mod. NGSi 05................................................................................................................................42
15.2 Mod. NGSi 07................................................................................................................................43
15.3 Mod. NGSi 10................................................................................................................................43
15.4 Mod. NGSi 15................................................................................................................................43
Chapter 16
O
PERATING LIMITS
...........................................................................................................................................44
16.1 Evaporator water flow rate ............................................................................................................44
16.2 Chilled water production (summer operation)...............................................................................44