Midea MAW User Manual page 7

How To Handle Equipment Containing Flammable Refrigerants
1. Transport of equipment containing fl ammable refrigerants.
See transport regulations.
2. Marking of equipment using signs.
See local regulations.
3. Disposal of equipment using fl ammable refrigerants.
See national regulations.
4. Storage of equipment.
The storage of the appliance should be in accordance with the applicable regulations or instructions,
whichever is more stringent.
5. Storage of packed (unsold) unit.
Storage package protection should be constructed such that mechanical damage to the unit inside the
package will not cause a leak of the refrigerant charge. The maximum number of pieces of equipment
permitted to be stored together will be determined by local regulations.
6. Information on servicing.
1) Checks to the area
Prior to beginning work on systems containing fl ammable refrigerants, safety checks are necessary
to ensure that the risk of ignition is minimized. For repair to the refrigerating system, the following
precautions shall be complied with prior to conducting work on the system.
2) Work procedure
Work shall be undertaken under a controlled procedure so as to minimize the risk of a fl ammable gas or
vapor being present while the work is being performed.
3) General work area
All maintenance staff and others working in the local area shall be instructed on the nature of work being
carried out. Work in confi ned spaces shall be avoided. The area around the workspace shall be sectioned
off. Ensure that the conditions within the area have been made safe by control of flammable material.
4) Checking for presence of refrigerant
The area shall be checked with an appropriate refrigerating detector prior to and during work, to ensure the
technician is aware of potentially fl ammable atmospheres. Ensure that the leak detection equipment being
used is suitable for use with fl ammable refrigerants. (i.e. non-sparkling, adequately sealed or intrinsically safe).
5) Presence of fi re extinguisher
If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate
fi re extinguishing equipment shall be available to hand. Have a dry powder or CO2 fi re extinguisher
adjacent to the charging area.
6) No ignition sources
During work on refrigeration systems involving pipes containing or having contained fl ammable
refrigerants, individuals must avoid using any ignition sources that could potentially cause fi re or
explosion risks. This includes maintaining a safe distance from the installation, repair, removal, and
disposal sites where fl ammable refrigerants may be present. Before commencing work, the surrounding
area must be inspected to ensure there are no fl ammable hazards or ignition risks. Additionally, 'No
Smoking' signs should be prominently displayed.
7) Ventilated area
Before initiating any system breach or conducting hot work, ensure the area is outdoors or properly
ventilated. Adequate ventilation must be maintained throughout the duration of the work to safely
disperse any released refrigerant, ideally venting it externally into the atmosphere.
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