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During manufacturing/servicing of RAC equipment, circuit components accumulate greasy, oily and solid contamination on their inner surfaces that reacts chemically with the refrigerant and compressor oil combination resulting in the formation of sludge. This in turn deposits on the tubing and causes choking of capillaries which is a major problem in the servicing of refrigeration and air-conditioning systems. |
To ensure good system performance the service sector needs to maintain higher system cleanliness. During servicing, the technicians used to pour CTC in the circuitry and flush with nitrogen for the required cleaning purpose.
Though many enterprises use solvents like petrol and NC thinner, it is not desirable to use these solvents as they can leave residues in the system which in the presence of oil and moisture can later form into sludge.
The table below presents a list of viable alternatives for refrigeration circuitry cleaning. Hexane and MDC are usually the preferred options.
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Sl. No |
Solvent |
1 |
Hexane |
2 |
Methylene Dichloride (MDC) |
3 |
Perchloroethylene (PCE) |
4 |
Toluene |
5 |
White petrol |
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HAZARDS TO CONSIDER |
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Every substance has limitations. While every solvent is toxic to a certain extent, the harmfulness varies from one substance to another. A given substance may be hazardous on skin contact, be a fire hazard, harm the environment and / or cause cancer (i.e. red category. ). Knowledge on the hazard ratings will help industries to take appropriate preventive measures and detailed information on hazards and control measures are provided in the TA
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FURTHER INFORMATION
A detailed technical document titled "Selection and Safe Use of Alternatives to CTC - RAC" has been published and is available for download.
Download the document here
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Disclaimer
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Though all care has been taken while researching and compiling the information presented above, GTZ Proklima accepts no liability for its accuracy. The reader is advised to confirm its correctness prior to use or purchase of any substance.
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GTZ Proklima makes no claim in respect of the suitability of any substance as substitute for CTC in any specific industrial process. Suitability remains to be verified through trials with due consideration of health and safety aspects
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Information provided here does not constitute an endorsement or recommendation of any product by GTZ Proklima.
While preference is given to non-proprietary products information on selected proprietary
products may be included if they appear to have a better environment,
health and safety performance or if they are already widely adopted by the industry.
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