MTA NGSi 07 - Standard Water System Diagram

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TECHNICAL MANUAL

Chapter 21 - Double setpoint kit (optional accessory)

NGSi 05÷15

ENGLISH

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

21.10 Standard water system diagram

Underfloor

heating system

Fan coil

3-way valve

Double setpoint

(VD accessory)

3-way valve for

domestic hot water

(VD accessory)

Hot water storage tank

Mains water

Water Probe

Domestic hot

water

(SAS accessory)

Main Page

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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