Tecumseh CAJ Serie Instrucciones De Instalación página 11

- Perform a search for leaks,
- Carry out a general inspection of the installation (cleanliness, unusual noises, etc.), Perform a visual inspection of the
refrigerating system (e.g. according to the list provided in Annex G of standard EN378-2).
For installations which run using a flammable refrigerant fluid, where necessary, check that the leak detection equipment functions
correctly.
Do not add oil unless the pipes are longer than 20 m; if this is the case, use oil recommended by Tecumseh.
6.5. Maintenance
Tecumseh recommends that the maintenance zone is secured in accordance with standard EN 378 Part 4.
A non-exhaustive list of recommendations is provided below:
- Obtain the permit for working at high temperatures (where applicable);
- Make sure that no flammable materials are stored in the work area and that there is no source of sparks in the work area;
- Disconnect electrical appliances from the main power supply;
- Remove sources of heat to prevent an explosion;
- If a heat source is present in the work place, ensure that a fire extinguisher is provided;
- Make sure that the work area is ventilated in a suitable manner before performing any works on the refrigeration circuit or
prior to welding or soft soldering;
- Mark off the work area in order to prevent the entry of unauthorized persons;
- Ensure that the leak detection system in use is anti-spark and is secured in an adequate fashion or has intrinsic safety;
- Make sure that all maintenance personnel have been trained.
Each time that this is possible, the refrigerant system which runs using a fluid classified as category A2L, A2, or A3 will be taken to a
special workshop for maintenance.
Check that the refrigeration circuit pressure will not present any risk or hazard during the work (ejection of parts, refrigerant, etc.).
An operational compressor can reach temperatures in excess of 120°C. Never work on the compressor without protection.
IMPORTANT: If the detection system which prevents a current peak that is likely to melt the insulation (pin venting) has been
triggered, do not rearm it. Replace the compressor by following the installation and commissioning rules and recommendations
(see section 5).
6.5.1. Recovery of flammable fluids
- Contact your supplier to ensure that your recovery unit can be used with hydrocarbons and HFOs.
- Identify the fluid in the cylinder and affix the flammable warning sign.
- Never mix different refrigerants.
6.5.2. Rendering the refrigerant circuit inert and precautionary measures prior to soldering
- Make sure a fire extinguisher is available in close proximity,
- Render the system inert using oxygen-free nitrogen (or air),
- Ideally the flow should be ventilated outdoors.
6.5.3. Opening the refrigerant circuit and replacing the components
IMPORTANT: Soldering is prohibited during any work on installations loaded with a flammable refrigerant. Generally, it is
essential that all ignition sources (sparks, flames, sources of heat) are kept away from the circuit.
After replacing the components, crimped connections are an alternative to soldering.
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