Airwell Itelco-Clima CLS 402 ELN User Manual (English)

Questions and Answers:

Y
ygibsonAug 17, 2025
How to fix excessive noise in my Airwell Itelco-Clima CLS 402 ELN?
- R
  Ronald CollinsAug 17, 2025
  Excessive noise in your Airwell Chiller can stem from several sources. Check the following: * Examine the lines for vibration and inspect the clamping brackets, if any, to ensure they are secure. * A whistling sound from the thermostatic expansion valve may indicate the need to refill the system. * Inspect the dehydrating filter. * A noisy compressor could have seized bearings, requiring compressor replacement. * Ensure the compressor’s locknuts are tightened.
P
pauljenniferAug 21, 2025
What to do if HP alarm activates and stops my Airwell Itelco-Clima CLS 402 ELN Chiller?
- C
  Christopher HallAug 21, 2025
  If the HP alarm is activated and your Airwell Chiller stops, consider these possible causes: * Check the operation of the pressure switch and replace it if it's defective. * Ensure the delivery valve is fully open; if faulty, replace it. * The presence of substances with condensable gases in the circuit may require draining the circuit. * If the condenser fan is not working, check its cables and motor; repair or replace as needed.
I
Ian FranklinAug 25, 2025
Why does the LP alarm activate and stop my Airwell Itelco-Clima CLS 402 ELN Chiller?
- K
  Kathleen WhiteheadAug 25, 2025
  The activation of the LP alarm, which causes your Airwell Chiller to stop, can be due to: * A gas leak. Identify and remove the leak. * Insufficient charge. Refill the system. * Failure of the pressure switch. Replace the pressure switch.
R
Ryan BartonAug 27, 2025
How to troubleshoot an Airwell Itelco-Clima CLS 402 ELN Chiller that runs but doesn't cool?
- C
  Cheryl GallagherAug 27, 2025
  If your Airwell Chiller is running but not providing cooling, the issue might be: * Insufficient refrigerant. In this case, you should refill it. * A clogged dehydrating filter. If this is the case, replace it.
D
Daniel CruzAug 31, 2025
What causes a low oil level in the Airwell Itelco-Clima CLS 402 ELN Chiller compressor?
- M
  Mrs. Rebecca Carter DVMAug 31, 2025
  A low oil level in your Airwell Chiller's compressor can be caused by: * One or more gas or oil leaks in the circuit. Identify and remove any leaks. * Mechanical failure of the compressor. Request the intervention of a Service Centre. * Anomaly of the oil heater of the compressor’s base. Check the electric circuit and the resistor of the heater of the motor base, and replace defective components.
J
Jennifer BrownSep 3, 2025
Why is there ice forming on the suction line of my Airwell Itelco-Clima CLS 402 ELN?
- M
  Melissa LeeSep 3, 2025
  Ice formation on the suction line of your Airwell Chiller can be caused by: * Wrong calibration of overheating. Increase overheating. * Check the charge.
S
Susan HernandezSep 6, 2025
What causes frosting on the liquid line of my Airwell Itelco-Clima CLS 402 ELN?
- N
  Nicole OconnorSep 6, 2025
  Frosting on the liquid line of your Airwell Chiller can occur if: * The valve of the liquid line is partially closed. Check that valves are open. * The liquid filter is clogged. Replace the cartridge or the filter.
X
xmartinSep 10, 2025
Why is the liquid line of my Airwell Itelco-Clima CLS 402 ELN too hot?
- K
  Kelly LongSep 10, 2025
  If the liquid line of your Airwell Chiller is too hot, it may be due to insufficient charge. Identify and remove the cause of the loss of charge and refill.

Airwell Itelco-Clima CLS 402 ELN Specifications

General

Brand	Airwell
Model	Itelco-Clima CLS 402 ELN
Category	Chiller
Language	English

Summary

1 FOREWORD

1.1 Introduction

Introduces Itelco-Clima units and their capabilities for HVAC applications.

1.2 Warranty

Details warranty conditions and requirements for validity.

1.3 Emergency stop / Normal stop

Explains the procedure for emergency and normal stopping of the unit.

1.4 An introduction to the manual

Explains manual conventions and safety guidelines.

2 SAFETY

2.1 Foreword

Outlines compliance with directives and general safety principles.

2.2 Definitions

Defines terms like OWNER and INSTALLER in the context of the manual.

2.3 Access to the unit

Specifies access requirements and restrictions for personnel.

2.4 General precautions

Lists precautions for operators and installers when approaching or working on the unit.

2.5 Precautions against residual risks

Details safety measures for control systems, mechanical, and electrical risks.

2.6 Precautions during maintenance operations

Outlines safety measures before and during maintenance tasks.

2.7 Safety plates

Describes various safety labels and identification plates on the unit.

2.8 Safety regulations

Provides detailed safety data and regulations for refrigerants and oils.

3 TRANSPORT, LIFTING AND POSITIONING

3.1 Inspection

Instructions for inspecting units upon delivery and reporting damage.

3.2 Lifting

Guidelines and precautions for lifting the unit safely using eyebolts.

3.3 Anchoring

Recommendations for anchoring the unit to foundations.

3.4 Storage

Precautions for storing the unit before installation to prevent damage.

4 INSTALLATION

4.1 Positioning of the unit

Guidance on selecting the installation location and ensuring structural support.

4.2 Installation of Spring Shock Absorbers

Steps for installing optional spring shock absorbers for vibration isolation.

4.3 External hydraulic circuit

Requirements and components for the external hydraulic circuit and flow meter installation.

4.4 Hydraulic connection

Instructions for connecting the unit's hydraulic fittings.

4.5 Draining the defrosting waste water

Guidelines for draining waste water from heat pump units.

4.6 Power supply

Safety precautions and requirements for the unit's power supply.

4.7 Electrical connections

Detailed instructions for electrical connections, voltage checks, and phase balance.

5 START-UP

5.1 Preliminary check

Lists essential checks before unit start-up.

5.2 Start-up

Step-by-step procedure for initial unit start-up.

5.3 Checking the operation

How to check unit performance parameters after start-up.

5.4 Delivery to the customer

Instructions for training the user upon delivery.

6 CONTROL

6.1 General information

Overview of the control system and its functions.

6.2 Control system

Details temperature regulation and antifreeze functions.

6.3 Display

Explains the unit's display indicators and LED functions.

6.4 Start-up

Procedures for starting up cooling-only and heat pump models.

6.5 Switching the working temperature

How to change operating modes between cooling and heating.

6.6 Main alarms

Lists and explains main unit alarms and their reset procedures.

7 GENERAL DESCRIPTION

7.1 Introduction

General overview of CLS/CLH units and their applications.

7.2 General specifications

Describes unit construction, materials, and general features.

7.3 Compressors

Details the hermetic scroll compressors used in the units.

7.4 Refrigeration circuits

Explains the two complete refrigeration circuits per unit.

7.5 Water heat exchanger

Describes the stainless steel plate type evaporators.

7.6 Air heat exchanger

Details the copper pipes and aluminum fins of the coils.

7.7 Fans

Information on the axial type condenser fans.

7.8 Electric power supply and control system

Description of the control compartment and electrical components.

7.9 Accessories

Lists optional accessories like flow meters and remote controls.

8 TECHNICAL DATA

8.1 Pressure drops in the evaporator

Tables showing pressure drops for various models and flow rates.

8.2 Technical data

Detailed technical specifications for CLS STD units.

8.3 Unit Electrical data

Electrical data for CLS/CLC STD units, including power and current.

8.4 Position of shock absorbers and weight distribution on supports

Table showing support positions and weight distribution for basic units.

8.5 Overall dimensions

Overall dimensions for CLS 182-302 models.

8.6 Service spaces

Recommended service space clearances for installation.

9 MAINTENANCE

9.1 General requirements

General requirements and responsibilities for unit maintenance.

9.2 Planned maintenance

Details the planned maintenance schedule and operations.

9.3 Refrigerant charge

Procedures and precautions for charging refrigerant.

9.4 Compressor

Information on compressor lubrication and replacement.

9.5 Condenser

Maintenance advice for the condenser coils.

9.6 Fans

Checks and precautions for the condenser fans.

9.7 Dehydrating filter

Maintenance and troubleshooting for the dehydrating filter.

9.8 Sight glass

How to use the sight glass for checking refrigerant and humidity.

9.9 Thermostatic expansion valve

Procedure to check and adjust the thermostatic expansion valve.

9.10 Evaporator

Maintenance for the evaporator heat exchanger, including cleaning.

10 TROUBLESHOOTING

Anomalies and Corrective Measures

Lists common unit anomalies, their causes, and solutions.

11 SPARE PARTS

11.1 Spare part list

Lists recommended spare parts for the first two years of operation.

11.2 Oil for compressors

Specifies the type of oil used for compressors.

11.3 Wiring diagrams

Information on the location and availability of wiring diagrams.

12 DISMANTLING, DEMOLITION AND SCRAPPING

12.1 Generalities

General procedures and safety precautions for dismantling and disposal.

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Airwell Itelco-Clima CLS 402 ELN User Manual

Table of Contents

Questions and Answers:

Airwell Itelco-Clima CLS 402 ELN Specifications

Summary

1 FOREWORD

1.1 Introduction

1.2 Warranty

1.3 Emergency stop / Normal stop

1.4 An introduction to the manual

2 SAFETY

2.1 Foreword

2.2 Definitions

2.3 Access to the unit

2.4 General precautions

2.5 Precautions against residual risks

2.6 Precautions during maintenance operations

2.7 Safety plates

2.8 Safety regulations

3 TRANSPORT, LIFTING AND POSITIONING

3.1 Inspection

3.2 Lifting

3.3 Anchoring

3.4 Storage

4 INSTALLATION

4.1 Positioning of the unit

4.2 Installation of Spring Shock Absorbers

4.3 External hydraulic circuit

4.4 Hydraulic connection

4.5 Draining the defrosting waste water

4.6 Power supply

4.7 Electrical connections

5 START-UP

5.1 Preliminary check

5.2 Start-up

5.3 Checking the operation

5.4 Delivery to the customer

6 CONTROL

6.1 General information

6.2 Control system

6.3 Display

6.4 Start-up

6.5 Switching the working temperature

6.6 Main alarms

7 GENERAL DESCRIPTION

7.1 Introduction

7.2 General specifications

7.3 Compressors

7.4 Refrigeration circuits

7.5 Water heat exchanger

7.6 Air heat exchanger

7.7 Fans

7.8 Electric power supply and control system

7.9 Accessories

8 TECHNICAL DATA

8.1 Pressure drops in the evaporator

8.2 Technical data

8.3 Unit Electrical data

8.4 Position of shock absorbers and weight distribution on supports

8.5 Overall dimensions

8.6 Service spaces

9 MAINTENANCE

9.1 General requirements

9.2 Planned maintenance

9.3 Refrigerant charge

9.4 Compressor

9.5 Condenser

9.6 Fans

9.7 Dehydrating filter

9.8 Sight glass

9.9 Thermostatic expansion valve

9.10 Evaporator

10 TROUBLESHOOTING

Anomalies and Corrective Measures

11 SPARE PARTS

11.1 Spare part list

11.2 Oil for compressors

11.3 Wiring diagrams

12 DISMANTLING, DEMOLITION AND SCRAPPING

12.1 Generalities