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MTA NGSi 05 Technical Manual Download Page 48

TECHNICAL MANUAL

Chapter 18 

- Dimensions

NGSi 05÷15

46

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

1 8 . 2

M o d .   N G S i   0 7

IN/OUT: 1”M

1 8 . 3

M o d .   N G S i   1 0 - 1 5

IN/OUT: 1”M

Summary of Contents for NGSi 05

Page 1: ...Chillers and inverter air water heat pumps with axial fans TECHNICAL MANUAL NGSi 05 15 38178800879 Original instructions in Italian language...

Page 2: ...must not be disposed of with ordinary household waste it must be dealt with in accordance with the legal requirements for WEEE under European Directive 2002 96 EC and the subsequent amendments 2003 10...

Page 3: ...heat exchangers 7 5 7 Control panel 8 5 8 Control system 8 5 9 Monitoring and protection devices 8 5 10 Water circuit 8 5 11 Fan speed regulation 8 Chapter 6 VERSIONS AVAILABLE 8 6 1 Optional accessor...

Page 4: ...ndication 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...

Page 5: ...1 Mod NGSi 05 07 47 19 2 Mod NGSi 10 48 19 3 Mod NGSi 15 49 Chapter 20 CRH REMOTE KEYPAD OPTIONAL ACCESSORY 50 20 1 Connecting the CRH keypad to the minichiller 50 Chapter 21 DOUBLE SETPOINT KIT OPTI...

Page 6: ...be kept attached to this manual MTA is at customers service for the provision of more detailed information the topics covered by this manual or information concerning the use and maintenance of its e...

Page 7: ...plastic bags etc because it can be a potential source of danger All routine or unplanned maintenance operations must be carried out with the equipment at a standstill and disconnected from the electri...

Page 8: ...al assistance Contact with the skin Wash immediately in plenty of clean water Remove contaminated clothing immediately FIRE FIGHTING MEASURES Means of extinction Any Specific hazards Pressure rise Spe...

Page 9: ...peration 5 4 A i r s i d e e x c h a n g e r The air side heat exchangers are constructed with copper tubes and aluminium fins The copper tubes have a diameter of 7 mm in the 05 and 07 models and 5 16...

Page 10: ...g the circulator pump suitable for the use of chilled water and directly controlled by the unit s own control unit The circulator always of modulating type has an induction motor The water circuit als...

Page 11: ...r installation they should therefore never be covered with canopy roofs or placed close to trees or walls to ensure that air is not recycled through them A plinth of suitable size for the unit should...

Page 12: ...entration it is possible to use the service valve Unscrew the cap of the service tap and connect a hose connection to the 14 mm inner diameter hose connected to the water network and then load the sys...

Page 13: ...tch LP Low pressure transducer LS Liquid separator on 07 10 and 15 models only 4WV Cycle reverser valve LR Liquid receiver EEV Electronic expansion valve NRV Check valve may be fitted on some models F...

Page 14: ...ace securing them with the fixing screws WARNING There must be no variations in the power supply voltage in excess of 10 of the nominal value If this tolerance is not complied with please contact our...

Page 15: ...unication modbus for remote keypad ground reference connection 12V power supply output 12Vac 50Hz remote keypad power supply output 12V 50Hz 500mA 12V power supply output 12Vac 50Hz remote keypad powe...

Page 16: ...analogue input ST10 0 10V signal input for setpoint modification WARNING The unit must be connected to the electrical mains and set in STANDBY mode powered up by turning on the master switch at least...

Page 17: ...ure C t05 high pressure bar t06 low pressure bar t07 outdoor air temperature C t09 domestic hot water temperature C if domestic hot water production is enabled UP key In parameter setting mode used to...

Page 18: ...eter index Configuration CnF H01 Compressor CP C01 Fan FAn F01 Alarms ALL A01 Adjustment Re b01 Pump PUP P01 Electric heaters Fro r01 Defrosting dFr d01 Electronic valve EEu U01 Offset OFF o01 Setpoin...

Page 19: ...remote keypad is used b09 cooling maximum offset b10 heating maximum offset b11 External temperature setting in cooling mode b12 External temperature setting in heating mode b13 Temperature delta in...

Page 20: ...operating or if the hydraulic pump in antifreeze mode operation is activated The operation in antifreeze mode is activated if the adjustment temperature drops below P04 C default 5 C it is disabled i...

Page 21: ...ith flow switch alarm active in automatic reset the pump is however turned on even if the compressor is off The periodic function is also interrupted in the case of intervention of the antifreeze regu...

Page 22: ...ing parameter H10 with the value 1 and parameter H20 with the value 6 to enable the analogue input for the probe These settings are accessed by entering the maintenance password and accessing paramete...

Page 23: ...The storage function stops in the moment in which the temperature read by the probe becomes lower than the stored value or after the expiry of a time equal to b06 seconds default 45 seconds 9 12 2 Do...

Page 24: ...F contact is open During winter mode operation defrosting always takes place on the user side and never on the domestic hot water tank 9 1 3 D o m e s t i c h o t w a t e r a c c u m u l a t i o n i n...

Page 25: ...e system side and domestic hot water side in particular the configurations are 1 r14 0 default the heaters can be activated simultaneously if present 2 r14 1 the heaters are activated in exclusion to...

Page 26: ...ode with priority no heaters intervention priority r23 6 default hot water tank used both in domestic hot water mode and on system with priority no heaters intervention priority r24 0 backup heaters n...

Page 27: ...6 0 1 7 1 Domestic hot water backup heater 2 After r15 minutes hot water tank HEAT DOMESTIC HOT WATER domestic hot water 0 1 1 set the minutes 2 3 2 3 8 1 Hot water tank 2 After r15 minutes domestic h...

Page 28: ...nal r15 minutes hot water tank HEAT DOMESTIC HOT WATER domestic hot water 0 1 1 set the minutes 2 3 2 3 8 1 Heat pump 2 After r15 minutes hot water tank 3 After additional r15 minutes domestic hot wat...

Page 29: ...estic hot water backup heater 3 After additional r15 minutes heat pump HEAT DOMESTIC HOT WATER domestic hot water 0 1 1 set the minutes 2 3 2 3 7 1 Hot water tank 2 After r15 minutes heat pump 3 After...

Page 30: ...er tank 2 After r12 minutes System domestic hot water backup heater HEAT HEAT DOMESTIC HOT WATER both in heat mode and domestic hot water mode 0 1 0 1 2 set the minutes set the minutes 6 3 6 1 System...

Page 31: ...23 r24 1 1 Domestic hot water backup heater COOL DOMESTIC HOT WATER domestic hot water 0 1 1 set the minutes 0 1 2 3 4 5 6 2 3 Table 6 BACKUP HEATERS OPERATION No STATUS OPERATION SYSTEM BACKUP HEATER...

Page 32: ...rol depends on the condensing pressure in chiller mode while it depends on the evaporation pressure in heat pump mode The ventilation adjustment occurs in a way dependent on the compressor operation 9...

Page 33: ...therefore for more information refer to the manual of this control 9 23 2 Disinfection Legionella prevention The legionella prevention disinfection function is implemented in the machines This functio...

Page 34: ...26 0 28 I 0 input not assigned 26 humidity switch second setpoint 28 domestic hot water temperature control from digital mode SE SE Terminals Input which can be used in exclusion of ST8 if used set H1...

Page 35: ...ed 6 domestic hot water 3 way valve 22 system backup heater 24 alarm 26 domestic hot water backup heater 29 hot water tank 31 system season indication For correct connection to terminals NC1 N1 and NO...

Page 36: ...lue may impair operation of the unit b04 Radiator valve switching time seconds 30 0 600 I b06 Transient domestic hot water output seconds 45 0 255 I b08 Dynamic setpoint enabling 0 0 1 I 0 function di...

Page 37: ...odel 0 0 25 5 I If in doubt concerning the value to set contact the manufacturer Values other than the default value may impair operation of the unit F20 Pressure setting with fan at maximum speed in...

Page 38: ...System backup heater enabling 0 0 1 I 0 function disabled 1 function enabled r11 System backup heater delta C 0 5 0 0 25 5 I r12 System backup heater heat pump activation delay min 10 0 255 I r14 Exc...

Page 39: ...both in domestic hot water mode and on system with heaters priority r24 Backup heaters type of use 3 0 3 I 0 backup heaters not used 1 only system backup heater use 2 only domestic hot water backup he...

Page 40: ...te ON OFF E00 If the unit is controlled by a remote digital input 9 26 7 High pressure E01 The alarm is tripped if the pressure transducer on the unit gives a pressure reading of more than 41 bar In t...

Page 41: ...e of water and glycol or drain the water system and heat pump water circuits WARNING All the operations described in this section MUST ALWAYS BE PERFORMED BY QUALIFIED STAFF Before doing any work on t...

Page 42: ...h the unit contains fairly large amounts These procedures facilitate the recovery and recycling of the substances concerned thus reducing environmental impact CHAPTER 13 TECHNICAL DATA Clean the finne...

Page 43: ...nt drawdown A 0 48 0 57 0 55 2 0 55 2 Speed r min 900 900 1 000 1 000 Maximum air flow m3 s 1 08 1 63 2 11 2 59 Refrigerant gases Type R410A R410A R410A R410A Quantity of refrigerant kg 1 55 2 10 3 65...

Page 44: ...C water temp 7 12 C NOTE The stated performance data are guideline and may be subject to variation Furthermore the yields stated in points 1 2 3 and 4 are to be understood referring to the instantaneo...

Page 45: ...this manual is strictly prohibited 1 5 2 M o d N G S i 0 7 1 5 3 M o d N G S i 1 0 1 5 4 M o d N G S i 1 5 0 10 20 30 40 50 60 1 0 1 2 1 4 1 8 2 0 2 2 1 6 Work head kPa Flow rate m3 h 0 10 20 30 40 5...

Page 46: ...structural modifications must be made to the unit In this case contact our technical department for the feasibility and specification of the modifications to be made depending on requirements The maxi...

Page 47: ...tion factor The water flow and pressure drop correction factors must be applied to values obtained without the use of glycol The water flow correction factor is calculated in order to maintain the tem...

Page 48: ...05 15 46 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 1 8 2 M o d N G S i 0 7 IN OU...

Page 49: ...they can be modified by the manufacturer without notice Reproduction of this manual is strictly prohibited CHAPTER 19 ELECTRIC WIRING DIAGRAMS 1 9 1 M o d N G S i 0 5 0 7 It is necessary to setting th...

Page 50: ...ding and they can be modified by the manufacturer without notice Reproduction of this manual is strictly prohibited 1 9 2 M o d N G S i 1 0 Temp Sensor Heat Sink It is necessary to setting the correct...

Page 51: ...are not binding and they can be modified by the manufacturer without notice Reproduction of this manual is strictly prohibited 1 9 3 M o d N G S i 1 5 It is necessary to setting the correct parameters...

Page 52: ...pair CHAPTER 21 DOUBLE SETPOINT KIT OPTIONAL ACCESSORY 2 1 1 S c o p e a n d f i e l d o f a p p l i c a t i o n The double setpoint function adds a second working setpoint on the system side in both...

Page 53: ...obe inside the controller is compared with the dewpoint calculated at the last moment of tAr added to parameters odr and Hy if Tr Tint Tr odr the relay is activated for the whole of the next time tAr...

Page 54: ...suitable electrical protection must be provided for the fancoil power supply line In this second case the relay must be installed on DIN bar of the user terminal board on the unit connecting the powe...

Page 55: ...3 way valve switches 2 working setpoint changes after a parameter controlled time equal to opening of the three way valve default b04 30s from maintenance menu 2 1 8 E l e c t r i c a l w i r i n g d...

Page 56: ...valve is live even when the minichiller is OFF or is switched off using the internal circuit breaker In the event of a system malfunction always disconnect the power supply using the external circuit...

Page 57: ...ied by the manufacturer without notice Reproduction of this manual is strictly prohibited 2 1 1 0 S t a n d a r d w a t e r s y s t e m d i a g r a m Underfloor heating system Fan coil 3 way valve Dou...

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