Modine ECO PAE73 Manuel Technique page 46

11.11.4 Use a jet of water at a max pressure of 50 bar for damp dirt or grease at a minimum distance of 150 mm, directed
perpendicularly against the finned pack, avoiding bends or damage to the fins and pipes. If appropriate add a neutral
detergent (refer to its instructions for use). Rinse and then dry with compressed air as indicated in Chap. 11.11.3. Make
sure that the electrical components are not affected by the jet of water. If necessary, provide adequate coverage.
11.11.5 Aspirate possibly from the air inlet side.
11.11.6 After having cleaned the finned pack, perform a visual inspection to identify any dirt or the presence of fins that are
damaged (repeat the cleaning operation if necessary).
11.12 Only use original spare parts. Do not wait until the component is completely worn out, preventive replacements can
greatly improve performance and extend the life of the model.
11.13 For maintenance of any accessories or components mounted on the model, refer to their user-manuals.
11.14 After every maintenance work, carry out the checks before commissioning according to Chapter 9 and after commissioning
according to Chapter 10.
11.15 When repairing the system, be aware that even with non-flammable refrigerants (e.g. CO
medium), some traces of lubricating oil may be entrained and thus flammable mixtures may be created. It is therefore
recommended:
• do not smoke in the vicinity of the model or system;
• do not use naked flames in the vicinity of the model or system;
• avoid any contact between the fluid and the fire;
• remove any means of ignition from the installation site;
• only perform any welding or soldering repairs after the model and/or system has been completely drained. Avoid rele-
asing the fluid into the atmosphere.
11.16 In case of refrigerant leakage pay attention to the nature of the fluid used.
CO in particular tends to stratify near the ground (see Chapter 1.24).
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It is recommended to leave the installation site immediately and to activate the safety measures according to the regula-
tions in force in case of:
• visible continuous fluid leakage from the model or other parts of the installation;
• momentary but significant leakage of fluid from the model or other parts of the installation;
• feeling of discomfort by personnel;
• activation of CO or other refrigerant alarm sensors;
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In the event of operators feeling unwell, move away from the system and contact a doctor immediately. All operations
must be carried out by qualified personnel. The use of PPE is recommended (see Chapter 12). Ensure adequate venti-
lation of the working environment.
11.17 Always take into account the working pressure of the system. In particular, in the case of CO
pressure can reach 130 bar: in the event of a rupture, there is a risk of injury to persons or damage to property due to
the projection of debris, even from a great distance. Before carrying out any work, always make the system safe as per
current regulations. The use of PPE is recommended (see Chapter 12).
11.18 In the event of a leak of refrigerant fluid, check that it has not penetrated into rooms below or adjacent to the place of
installation: secure the rooms as per current regulations. In the case of CO
to stratify near the ground.
11.19 If there is a suspected or confirmed leakage of coolant located on the heat exchanger, do not enter the heat exchanger
compartment of the model, regardless of the extent of the leakage. Cut off the supply of refrigerant to the model. Pay
attention to the nature of the refrigerant: CO
stratification near the floor in the heat exchanger compartment. Avoid releasing refrigerant into the atmosphere as much
as possible. Open the doors of the heat exchanger compartment and secure the rooms in accordance with the regulations
in force. Ventilate the heat exchanger compartment before working on the model. It is recommended that refrigerant
detectors be used by the person carrying out the work. Repair work must be carried out only by qualified and authorised
personnel.
11.20 When dismantling and scrapping the unit, ensure that the appropriate PPE is used (see Chapter 12).
Ensure that the fluids are completely drained and properly disposed of. Pay particular attention to sharp edges.
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tends to stratify and accumulate near the floor. Danger of refrigerant
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is used as an extinguishing
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systems, the working
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systems, consider the tendency of the fluid
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