MTA NGSi 15 User Manual (English)

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Chillers and inverter air/water heat pumps

with axial fans

TECHNICAL MANUAL

NGSi 05÷15

38178800879

Original in

structions in Italian language

Contents3
- Table of Contents3
Chapter 1 PURPOSE and CONTENTS of this MANUAL6
- Conserving the Manual6
- Symbols Used in the Manual6
Chapter 26
Chapter 36
Tandards of Reference6
Ermitted Use6
Chapter 4 GENERAL SAFETY REGULATIONS7
- Occupational Health and Safety7
- Personal Protective Equipment7
- Safety Signs8
- Refrigerants Safety Datasheet8
Chapter 5 TECHNICAL FEATURES9
- Frame9
- Refrigerant Circuit9
- Compressors9
- Air Side Exchanger9
- Fans9
- User Heat Exchangers9
- Control Panel10
- Control System10
- Monitoring and Protection Devices10
- Water Circuit10
- Fan Speed Regulation10
Versions Available10
- Optional Accessories10
Nstallation10
- General10
- Lifting and Handling11
- Positioning and Spaces Required for Technical Purposes11
- Water Connections11
Chapter 612
Chapter 712
- Connecting to the Condensate Drain12
- Service Tap12
- System Drainage12
- Water System Diagram12
- Kw Chiller Diagram13
- Electrical Connections14
  - Connection Terminal Board14
Tart up16
Chapter 8 Analogue Inputs Menu17
- Parameters Category18
- Setpoints Settable by the User18
- Display18
- Leds18
- Modifying the Dynamic Setpoint19
- Modifying the Setpoint from 0-10V Input19
- EN 9.8 Hydraulic Pump Operation20
  - Operation on Call from Temperature Controller (Default)20
  - Operation on Call from Temperature Controller with Periodic Activation21
  - Continuous Operation21
  - Pump Proportional Adjustment21
- Heaters for Antifreeze Protection (if AK Accessory Is Installed)22
- Remote On-Off and Remote Summer-Winter Switching22
- Remote Water Temperature Probe22
- Domestic Hot Water Production Enable22
  - Probe Storage in Heating Mode23
  - Domestic Hot Water Production Call from Digital Input23
- Domestic Hot Water Accumulation in Hot Mode24
- System Backup Heaters25
- Systems Backup Heater in Defrost Mode25
- Domestic Hot Water Backup Heater25
- Backup Heaters Selection Mode25
- Activation of Backup and Hot Water Tank Heaters in Joint Operation Mode/Compressor Replacement Mode2325
- Pompa DI Calore26
- System Season Indication32
- Fan and Dissipation Control32
  - Ventilation Control in Chiller Mode32
  - Ventilation Control in Heating Mode32
- Defrost Cycle33
- Compressor Crankcase Heater33
- Functions Which Can be Enabled with Hi-T Accessory33
  - Screed Function33
  - Disinfection (Legionella Prevention)33
- Handbook for Installation Configurations33
- Tables of Settings Which Can be Made by the User and Installer33
- Alarms40
  - Flow Switch E0640
  - High Temperature E1840
  - Antifreeze E0540
  - Probe Alarms40
  - Inverter Timeout E8040
  - Remote ON/OFF E0040
  - High Pressure E0140
  - High Pressure Switch HP (in Series with Compressor Delivery Line Probe) E6440
  - Low Pressure E0240
User - Control Interface17
- Menu Structure17
Chapter 11 ROUTINE CHECKS and MAINTENANCE41
- Environmental Protection42
Chapter 1041
Ength Shut - Downs41
Chapter 1242
Chapter 1342
Taking the Unit out of Service42
Technical Data42
Chapter 1444
Chapter 15 HEAT PUMP WORKING HEADS44
- Mod. Ngsi 0544
- Mod. Ngsi 0745
- Mod. Ngsi 1045
- Mod. Ngsi 1545
Electrical Data of Unit and Control Devices44
Chapter 16 OPERATING LIMITS46
- Evaporator Water Flow Rate46
- Chilled Water Production (Summer Operation)46
- Hot Water Production (Winter Operation)46
- Room Air Temperature and Summary Table46
Chapter 1747
Chapter 18 DIMENSIONS47
- Mod. Ngsi 0547
- Mod. Ngsi 0748
- Mod. Ngsi 10-1548
Correction Factors for the Use of Glycol47
Chapter 19 ELECTRIC WIRING DIAGRAMS49
- Mod. Ngsi 05-0749
- Mod. Ngsi 1050
- Mod. Ngsi 1551
Chapter 20 CRH Remote Keypad (Optional Accessory)52
- Connecting the CRH Keypad to the Minichiller52
Double Setpoint Kit ( Optional Accessory )52
- Scope and Field of Application52
- Kit Components and Technical Data53
- Humidity Switch Mode Operation53
- Minichiller Settings54
- Installation Notes54
- Settable Setpoints54
- Switching Functions55
- Electrical Wiring Diagram55
Chapter 2155
- Wiring Diagram, Configuration Without External Relay55
- Wiring Diagram, Configuration with External Relay56
- Humidity Switch Connections56
- Standard Water System Diagram57

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MTA NGSi 15 Specifications

General

Brand	MTA
Model	NGSi 15
Category	Heat Pump
Language	English

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MTA NGSi 15 User Manual

Table of Contents

MTA NGSi 15 Specifications

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