Airwell Itelco-Clima CLS 352 ELN User Manual

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English

Air cooled water chillers, air cooled condensing units and air-to-water

reverse cycle heat pumps

Installation and maintenance manual

IOM CLSCH-N.1GB

Date : November 2005

Supersedes : None

CLS/CLC/CLH

182 ÷ 602

41



140 kW

46



152 kW

Библиотека СОК 

Table of Contents

Questions and Answers:

S
sandersalisonAug 17, 2025
How to fix excessive noise in my Airwell Chiller?
- C
  Carolyn NovakAug 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.
C
Christina ReynoldsAug 21, 2025
What to do if HP alarm activates and stops my Airwell Itelco-Clima CLS 352 ELN?
- T
  Thomas GrayAug 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.
R
Robert VasquezAug 25, 2025
Why does the LP alarm activate and stop my Airwell Itelco-Clima CLS 352 ELN Chiller?
- B
  Brandi CarterAug 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.
B
banksjoyceAug 27, 2025
How to troubleshoot an Airwell Itelco-Clima CLS 352 ELN that runs but doesn't cool?
- M
  Miguel BartlettAug 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.
A
Amy RandolphAug 30, 2025
What causes a low oil level in the Airwell Chiller compressor?
- D
  Derek MuellerAug 30, 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
Jacqueline CookSep 3, 2025
Why is there ice forming on the suction line of my Airwell Itelco-Clima CLS 352 ELN?
- D
  Diana CobbSep 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.
T
Tracey PerezSep 6, 2025
What causes frosting on the liquid line of my Airwell Itelco-Clima CLS 352 ELN Chiller?
- B
  Brittany RandallSep 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.
L
Lisa LongSep 10, 2025
Why is the liquid line of my Airwell Itelco-Clima CLS 352 ELN Chiller too hot?
- D
  David JohnsonSep 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 352 ELN Specifications

General

Brand	Airwell
Model	Itelco-Clima CLS 352 ELN
Category	Chiller
Language	English

Summary

2 SAFETY

2.5 Residual Risk Prevention

Measures for residual risks related to control systems, mechanical, and electrical hazards.

2.6 Maintenance Safety Precautions

Specific safety precautions to be taken before and during maintenance.

4 INSTALLATION

4.6 Power Supply Safety

Safety precautions before electrical operations and grounding.

4.7 Electrical Connection Standards

Guidelines for electrical connections, compliance with standards, and voltage checks.

Terminal Box CLS/CLH/CLC Wiring

Wiring diagrams and connections for CLS/CLH/CLC STD-LN-ELN-HPF-HT terminal boxes.

Terminal Box CLH EH Wiring

Wiring diagrams and connections for CLH EH terminal boxes.

5 START-UP

5.1 Pre-Start-Up Checks

Pre-start-up checks of electrical, hydraulic, and plant components.

5.2 Unit Start-Up Sequence

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

5.3 Operation Checks

Checks for water temperatures, flow rates, and electrical absorptions during operation.

6 CONTROL

6.2 Temperature & Antifreeze Control

Details on temperature regulation and antifreeze functions.

6.4 Unit Start-Up Procedures

Procedures for starting the unit in cooling-only and heat pump modes.

6.6 Main Alarm Codes and Resets

List of main alarms, their codes, descriptions, and reset procedures.

8 TECHNICAL DATA

8.1 Evaporator Pressure Drops

Table of pressure drops in the evaporator for various CLS/CLH models.

8.2 CLS/CLC Model Specifications

Technical specifications for CLS/CLC STD, LN, ELN, HPF models.

8.2 CLH Model Specifications

Technical specifications for CLH STD, LN, ELN, HPF models.

8.3 Unit Electrical Data (CLS/CLC)

Electrical data for compressors, pumps, and fans across all CLS/CLC model series.

8.3 Unit Electrical Data (CLH)

Electrical data for compressors, pumps, and fans across all CLH model series.

9 MAINTENANCE

9.2 Planned Maintenance Schedule

9.3 Refrigerant Handling and Charging

Procedures and precautions for refrigerant charging and handling.

9.4 Compressor Maintenance

Information on compressor lubrication and replacement procedures.

9.7 Dehydrating Filter Service

9.9 Expansion Valve Adjustment

10 TROUBLESHOOTING

Anomalies, Causes, and Operations (Part 1)

Table of common unit anomalies, their causes, and recommended operations.

Anomalies, Causes, and Operations (Part 2)

Further troubleshooting for compressor issues, alarms, and line temperatures.

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