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AERMEC NRL - User Manual

AERMEC NRL
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INRLPY. 02.10 4086916_01
NRL
° COMPACT
L COMPACT LOW NOISE
H STANDARD COMPACT HEAT PUMP
HL SILENCED COMPACT HEAT PUMP
EN
CHILLERS- Technical manual - installation - maintenance

Table of Contents

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Summary

1. GENERAL WARNINGS

1.1. CONSERVING THE DOCUMENTATION

Instructions for users on safekeeping and accessibility of documentation.

1.2. SAFETY PRECAUTIONS AND INSTALLATION

Guidelines for safe installation by qualified technicians and hazard warnings.

2. DESCRIPTION AND CHOICE OF THE UNIT

2.1. VERSIONS AVAILABLE

Details on 'Cooling Only' and 'Heat Pump' versions with their operating limits.

2.2. VERSIONS AVAILABLE

Details on Heat Recovery, Total Recovery, and Mechanical Thermostatic Valve versions.

2.3. CONFIGURATOR

Tool for selecting unit options and configurations based on model and features.

3. CHILLER CIRCUIT

3.1. FRAME AND FANS

Description of the unit's frame construction and fan types (axial, enlarged, inverter).

3.2. HYDRAULIC COMPONENTS

Details on hydraulic components like circulation pumps, flow switches, and water filters.

3.3. SAFETY AND CONTROL COMPONENTS

Overview of safety switches, transducers, and control components within the chiller.

3.4. ELECTRICAL COMPONENTS

Information on the electrical panel, standards, safety devices, and control interfaces.

4. ACCESSORIES

6. TECHNICAL DATA

6.1. TECHNICAL DATA VERSIONS [°-L]

Detailed technical specifications for '°-L' versions: output, power, flow rates, and energy indices.

7. TECHNICAL DATA

7.1. TECHNICAL DATA VERSIONS [H-HL]

Technical data for Heat Pump versions (H-HL), covering cooling and heating performance parameters.

8. TECHNICAL DATA

8.1. TECHNICAL DATA VERSIONS [C]

Technical data specific to 'C' (Condenser unit) versions, including cooling and electrical parameters.

9. OPERATING LIMITS

9.1. COOLING MODE

Graphical representation of operating limits for cooling mode based on water and air temperatures.

9.2. HEATING MODE

Graphical representation of operating limits for heating mode based on water and air temperatures.

9.3. CONDENSER UNIT OPERATION

Graphical representation of operating limits for condenser unit operation based on air and evaporation temperatures.

10. CORRECTION FACTORS

10.1. COOLING CAPACITY AND INPUT POWER

Correction factors and diagrams for calculating cooling capacity and input power under various conditions.

10.2. HEATING CAPACITY AND INPUT POWER

Correction factors and diagrams for calculating heating capacity and input power for heat pump versions.

10.4. FOULING FACTORS

Table providing fouling factors to adjust performance data based on heat exchanger cleanliness.

11. PRESSURE DROPS

11.1. TOTAL PRESSURE DROPS (°-L)

Diagrams showing total pressure drops for cooling versions based on water flow rate.

11.2. TOTAL PRESSURE DROP (H-HL)

Diagrams showing total pressure drops for heat pump versions based on water flow rate.

12. ACCUMULATOR

12.1. MAXIMUM;MINIMUM WATER CONTENT IN THE SYSTEM

Guidelines for maximum water content in the hydraulic system, considering expansion tank capacity.

12.1.2. Expansion tank calibration

Procedure for calibrating the expansion tank pressure based on hydraulic height.

13. CAPACITY CONTROLS

14. GLYCOL

14.1. HOW TO READ THE GLYCOL CURVES

Instructions on interpreting graphs for determining glycol percentage and correction factors.

15. DESUPERHEATER

15.1. PRESSURE DROPS

Graphs and tables detailing pressure drops associated with the desuperheater unit.

16. TOTAL RECOVERY

16.1. PRESSURE DROP

Information on pressure drops for total heat recovery units, including diagrams and correction tables.

17. MEASUREMENTS OF THE CHILLERS LINES VERSIONS (C)

18. SOUND DATA

19. SELECTION AND PLACE OF INSTALLATION

20. POSITIONING

20.1. MINIMUM TECHNICAL SPACES (mm)

Diagrams specifying required clearance around the unit for installation and maintenance.

20.2. DIMENSIONAL TABLES

Detailed tables and diagrams showing the unit's dimensions and water connection points.

21. WEIGHT DISTRIBUTION AND CENTER OF GRAVITY

21.1. NRL - L 2800-3000-3300-3600

Table detailing weight distribution and center of gravity for 'L' versions across different models.

21.2. NRL - LH 2800-3000-3300-3600

Table detailing weight distribution and center of gravity for 'LH' versions across different models.

22. HYDRAULIC CIRCUIT

22.1. EXTERNAL HYDRAULIC CIRCUIT RECOMMENDED

Recommendations for installing external hydraulic circuits and necessary components.

22.2. SYSTEM LOAD

Procedure for filling and loading the unit's hydraulic system with water, including pressure checks.

22.3. EMPTYING THE SYSTEM

Instructions for draining the hydraulic circuit, including precautions for glycol.

23. ELECTRICAL WIRINGS

23.1. RECOMMENDED SECTION OF ELECTRIC CABLES

Table providing recommended cable sections for different power supplies and lengths.

23.2. CONNECTION TO THE POWER SUPPLY

Steps for accessing the electrical panel and connecting the unit to the power supply.

23.3. ELECTRICAL POWER CONNECTION

Procedure for making the main electrical power connection to the unit's terminals.

23.4. AUXILIARY CONNECTIONS AT THE USER;INSTALLER EXPENSE

Details on connecting auxiliary devices like pumps, alarms, and remote panels.

24. CONTROL AND FIRST START-UP

24.1. PREPARATION FOR COMMISSIONING

Checklist of pre-commissioning steps and safety checks before starting the unit.

24.2. FIRST COMMISSIONING OF THE MACHINE

Step-by-step guide for the initial start-up and operation of the chiller unit.

24.3. SEASON CHANGEOVER

Procedures for changing the unit's operation mode between seasons, including checks.

25. FUNCTIONING CHARACTERISTICS

25.1. COOLING SET POINT

Default and adjustable set point for cooling mode, including temperature difference (Δt).

25.2. HEATING SET POINT

Default and adjustable set point for heating mode, including temperature difference (Δt).

25.3. COMPRESSOR START DELAY

Explanation of the compressor start delay functions to prevent short cycling.

25.5. ANTI-FREEZE ALARM

Description of the anti-freeze alarm system and its intervention logic.

26. REGULAR MAINTENANCE

26.6.1. Hydraulic circuit

Checks for hydraulic circuit: filling, filters, flow switch, leaks, and glycol percentage.

26.6.2. Electric circuit

Checks for electric circuit: safety devices, power supply, consumption, and connections.

26.6.3. Chiller circuit

Maintenance checks for the chiller circuit: pressure, seals, and safety switches.

26.6.4. Mechanical controls

Inspection of mechanical components, fasteners, and structural conditions for wear or damage.

27. EXTRAORDINARY MAINTENANCE

27.6.1. Loading procedure

Step-by-step procedure for loading refrigerant gas into the refrigeration circuit.

Summary

1. GENERAL WARNINGS

1.1. CONSERVING THE DOCUMENTATION

Instructions for users on safekeeping and accessibility of documentation.

1.2. SAFETY PRECAUTIONS AND INSTALLATION

Guidelines for safe installation by qualified technicians and hazard warnings.

2. DESCRIPTION AND CHOICE OF THE UNIT

2.1. VERSIONS AVAILABLE

Details on 'Cooling Only' and 'Heat Pump' versions with their operating limits.

2.2. VERSIONS AVAILABLE

Details on Heat Recovery, Total Recovery, and Mechanical Thermostatic Valve versions.

2.3. CONFIGURATOR

Tool for selecting unit options and configurations based on model and features.

3. CHILLER CIRCUIT

3.1. FRAME AND FANS

Description of the unit's frame construction and fan types (axial, enlarged, inverter).

3.2. HYDRAULIC COMPONENTS

Details on hydraulic components like circulation pumps, flow switches, and water filters.

3.3. SAFETY AND CONTROL COMPONENTS

Overview of safety switches, transducers, and control components within the chiller.

3.4. ELECTRICAL COMPONENTS

Information on the electrical panel, standards, safety devices, and control interfaces.

4. ACCESSORIES

6. TECHNICAL DATA

6.1. TECHNICAL DATA VERSIONS [°-L]

Detailed technical specifications for '°-L' versions: output, power, flow rates, and energy indices.

7. TECHNICAL DATA

7.1. TECHNICAL DATA VERSIONS [H-HL]

Technical data for Heat Pump versions (H-HL), covering cooling and heating performance parameters.

8. TECHNICAL DATA

8.1. TECHNICAL DATA VERSIONS [C]

Technical data specific to 'C' (Condenser unit) versions, including cooling and electrical parameters.

9. OPERATING LIMITS

9.1. COOLING MODE

Graphical representation of operating limits for cooling mode based on water and air temperatures.

9.2. HEATING MODE

Graphical representation of operating limits for heating mode based on water and air temperatures.

9.3. CONDENSER UNIT OPERATION

Graphical representation of operating limits for condenser unit operation based on air and evaporation temperatures.

10. CORRECTION FACTORS

10.1. COOLING CAPACITY AND INPUT POWER

Correction factors and diagrams for calculating cooling capacity and input power under various conditions.

10.2. HEATING CAPACITY AND INPUT POWER

Correction factors and diagrams for calculating heating capacity and input power for heat pump versions.

10.4. FOULING FACTORS

Table providing fouling factors to adjust performance data based on heat exchanger cleanliness.

11. PRESSURE DROPS

11.1. TOTAL PRESSURE DROPS (°-L)

Diagrams showing total pressure drops for cooling versions based on water flow rate.

11.2. TOTAL PRESSURE DROP (H-HL)

Diagrams showing total pressure drops for heat pump versions based on water flow rate.

12. ACCUMULATOR

12.1. MAXIMUM;MINIMUM WATER CONTENT IN THE SYSTEM

Guidelines for maximum water content in the hydraulic system, considering expansion tank capacity.

12.1.2. Expansion tank calibration

Procedure for calibrating the expansion tank pressure based on hydraulic height.

13. CAPACITY CONTROLS

14. GLYCOL

14.1. HOW TO READ THE GLYCOL CURVES

Instructions on interpreting graphs for determining glycol percentage and correction factors.

15. DESUPERHEATER

15.1. PRESSURE DROPS

Graphs and tables detailing pressure drops associated with the desuperheater unit.

16. TOTAL RECOVERY

16.1. PRESSURE DROP

Information on pressure drops for total heat recovery units, including diagrams and correction tables.

17. MEASUREMENTS OF THE CHILLERS LINES VERSIONS (C)

18. SOUND DATA

19. SELECTION AND PLACE OF INSTALLATION

20. POSITIONING

20.1. MINIMUM TECHNICAL SPACES (mm)

Diagrams specifying required clearance around the unit for installation and maintenance.

20.2. DIMENSIONAL TABLES

Detailed tables and diagrams showing the unit's dimensions and water connection points.

21. WEIGHT DISTRIBUTION AND CENTER OF GRAVITY

21.1. NRL - L 2800-3000-3300-3600

Table detailing weight distribution and center of gravity for 'L' versions across different models.

21.2. NRL - LH 2800-3000-3300-3600

Table detailing weight distribution and center of gravity for 'LH' versions across different models.

22. HYDRAULIC CIRCUIT

22.1. EXTERNAL HYDRAULIC CIRCUIT RECOMMENDED

Recommendations for installing external hydraulic circuits and necessary components.

22.2. SYSTEM LOAD

Procedure for filling and loading the unit's hydraulic system with water, including pressure checks.

22.3. EMPTYING THE SYSTEM

Instructions for draining the hydraulic circuit, including precautions for glycol.

23. ELECTRICAL WIRINGS

23.1. RECOMMENDED SECTION OF ELECTRIC CABLES

Table providing recommended cable sections for different power supplies and lengths.

23.2. CONNECTION TO THE POWER SUPPLY

Steps for accessing the electrical panel and connecting the unit to the power supply.

23.3. ELECTRICAL POWER CONNECTION

Procedure for making the main electrical power connection to the unit's terminals.

23.4. AUXILIARY CONNECTIONS AT THE USER;INSTALLER EXPENSE

Details on connecting auxiliary devices like pumps, alarms, and remote panels.

24. CONTROL AND FIRST START-UP

24.1. PREPARATION FOR COMMISSIONING

Checklist of pre-commissioning steps and safety checks before starting the unit.

24.2. FIRST COMMISSIONING OF THE MACHINE

Step-by-step guide for the initial start-up and operation of the chiller unit.

24.3. SEASON CHANGEOVER

Procedures for changing the unit's operation mode between seasons, including checks.

25. FUNCTIONING CHARACTERISTICS

25.1. COOLING SET POINT

Default and adjustable set point for cooling mode, including temperature difference (Δt).

25.2. HEATING SET POINT

Default and adjustable set point for heating mode, including temperature difference (Δt).

25.3. COMPRESSOR START DELAY

Explanation of the compressor start delay functions to prevent short cycling.

25.5. ANTI-FREEZE ALARM

Description of the anti-freeze alarm system and its intervention logic.

26. REGULAR MAINTENANCE

26.6.1. Hydraulic circuit

Checks for hydraulic circuit: filling, filters, flow switch, leaks, and glycol percentage.

26.6.2. Electric circuit

Checks for electric circuit: safety devices, power supply, consumption, and connections.

26.6.3. Chiller circuit

Maintenance checks for the chiller circuit: pressure, seals, and safety switches.

26.6.4. Mechanical controls

Inspection of mechanical components, fasteners, and structural conditions for wear or damage.

27. EXTRAORDINARY MAINTENANCE

27.6.1. Loading procedure

Step-by-step procedure for loading refrigerant gas into the refrigeration circuit.

AERMEC NRL Specifications

General IconGeneral
BrandAERMEC
ModelNRL
CategoryChiller
LanguageEnglish

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