local regulations and give the minimum requirements for the provision of safety
and/or health signs for a work location.
All required signs are to be maintained and employers should ensure that
employees receive suitable and sufficient instruction and training on the
meaning of appropriate safety signs and the actions that need to be taken in
connection with these signs. The effectiveness of signs should not be dimin-
ished by too many signs being placed together. Any pictograms used should be
as simple as possible and contain only essential details.
Disposal of equipment using flammable refrigerants
See national regulations.
Storage of equipment/appliances
The storage of equipment should be in accordance with the manufacturer’s
instructions. Storage of packed (unsold) equipment
Storage package protection should be constructed such that mechanical
damage to the equipment 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.
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Name of Parts
1. Control panel
2. Guide the wind box
3. Castor
4. On the grid
5. Lid
6. The grille
7. Outfall
8. Handle
9. Exhaust joint
Fig 1
• Ensure sufficient ventilation at the equipment location.
• Be aware that malfunction of the equipment may be caused by refrigerant loss
and a refrigerant leak is possible.
• Discharge capacitors in a way that won’t cause any spark.
• Remove the refrigerant. If the recovery is not required by national regulations,
drain the refrigerant to the outside. Take care that the drained refrigerant will not
cause any danger. In doubt, one person should guard the outlet. Take special
care that drained refrigerant will not float back into the building.
• Evacuate the refrigerant circuit.
• Purge the refrigerant circuit with nitrogen for 5 min.
• Evacuate again.
• Fill with nitrogen up to atmospheric pressure.
• Put a label on the equipment that the refrigerant is removed.
e) Disposal
• Ensure sufficient ventilation at the working place.
• Remove the refrigerant. If the recovery is not required by national regulations,
drain the refrigerant to the outside. Take care that the drained refrigerant will not
cause any danger. In doubt, one person should guard the outlet. Take special
care that drained refrigerant will not float back into the building.
• Evacuate the refrigerant circuit.
• Purge the refrigerant circuit with nitrogen for 5 min.
• Evacuate again.
• Cut out the compressor and drain the oil.
Transportation, marking and storage for units that employ flammable refrigerants
Transport of equipment containing flammable refrigerants
Attention is drawn to the fact that additional transportation regulations may exist
with respect to equipment containing flammable gas. The maximum number of
pieces of equipment or the configuration of the equipment, permitted to be
transported together will be determined by the applicable transport regulations.
Marking of equipment using signs
Signs for similar appliances used in a work area generally are addressed by
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