EN
EN - 8 EN - 9
1.1 Workspace control
Prior to working on asystem containing ammable refrigerants, safety checks are nec-
essary to ensure that the risk of ignition is minimized. The following precautions must
be observed before repairing the cooling system.
1.2 Work procedure
The work must be carried out in acontrolled manner so as to minimize the risk of
ammable gases or vapors leaking.
1.3 Workspace
The entire maintenance crew and others working on site must be instructed about the
nature of the work performed. Work in conned spaces must be avoided. The space
around the workplace must be divided into sections. Safe indoor conditions must be
ensured by inspecting ammable materials.
1.4 Checking the presence of refrigerant
The room must be inspected with an appropriate refrigerant detector before and
during work to ensure that technicians are aware of the potentially ammable atmos-
phere. It must be ensured that the use of leak detection equipment is suitable for use
on ammable refrigerants, that is, non-sparking, appropriately sealed or inherently
safe.
1.5 Presence of re extinguisher
If any work is to be carried out on the refrigeration equipment or associated parts in
warm area, asuitable re extinguishing system must be available. The re extinguisher
must be powder or CO2 in the vicinity of the lling area.
1.6 No sources of ignition
No person performing work on the refrigeration system that involves exposing any
piping that contains or has contained ammable refrigerant shall use any sources of
ignition in away that could lead to arisk of re or explosion. The site of installation,
repair, removal, or disposal works during which ammable refrigerant may leak or be
let out should be kept clear of all potential ignition sources, including lit cigarettes. The
area around the appliance must be inspected prior to commencement of works to
ensure it is free of re and ignition hazards. "No smoking" signs must be posted.
1.7 Ventilated space
It must be ensured that the room is open or adequately ventilated before the system
is disrupted or work in warm environment is carried out. The ventilation intensity must
last for the duration of the work. Ventilation should safely disperse any discharged
refrigerant and preferably vent it to the atmosphere.
1.8 Inspection of cooling equipment
If electrical components are changed, these components must be suitable for this
purpose and meet the correct specications. The manufacturer’smaintenance and
service instructions must always be followed. If in doubt, contact the manufactur-
er’stechnical department for assistance.
The following checks must be carried out on installations containing ammable refrig-
erants:
• The volume of the ll is in accordance with the size of the room in which the parts
containing the refrigerant are installed;
• Ventilation units and outlets are working at full capacity and are not blocked;
• If an indirect refrigeration circuit is used, the second circuit must be checked for
the presence of refrigerant;
• The various markings on the appliance must at all times remain legible; illegible
ones must be repaired;
• Refrigeration pipes or components are installed in locations where they are
unlikely to be exposed to any substances that may corrode refrigerant-containing
components unless the components are constructed of materials that are