Part 1 General Information
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All rights reserved. Only training and service purposes.
• Refrigerant tubing shall be protected or enclosed to avoid damage.
• The installation of pipe-work shall be kept to a minimum
• When flared joints are reused indoors, the flare part shall be re-fabricated.
• When mechanical connectors are reused indoors, sealing parts shall be renewed.
• Do not use means to accelerate the defrosting process or to clean, other than
those recommended by the manufacturer.
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odour.
• Ducts connected to an appliance shall not contain an ignition source.
• Two or more people must lift and transport the product. Avoid personal injury.
• Periodic (more than once/year) cleaning of the dust or salt particles stuck on the
heat exchanger by using water.
• Dismantling the unit, treatment of the refrigerant oil and eventual parts should be
done in accordance with local and national standards.
• Mechanical connections shall be accessible for maintenance purposes.
• Ducts connected to an appliance shall not contain an ignition source.
• The appliance shall be disconnected from its power source during service and
when replacing parts.
Pipe-work shall be protected from physical damage.
Checks to the area
Prior to beginning work on systems containing flammable refrigerants, safety
checks are necessary to ensure that the risk of ignition is minimised. For repair to
the refrigerating system, the following precautions shall be complied with prior to
conducting work on the system.
Work procedure
Work shall be undertaken under a controlled procedure so as to minimise the risk of
a flammable gas or vapour being present while the work is being performed.
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 confined 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.
Checking for presence of refrigerant
The area shall be checked with an appropriate refrigerant detector prior to and during
work, to ensure the technician is aware of potentially flammable atmospheres. Ensure
that the leak detection equipment being used is suitable for use with flammable
refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.
Presence of fire extinguisher
If any hot work is to be conducted on the refrigeration equipment or any associated
parts, appropriate fire extinguishing equipment shall be available to hand. Have a
dry powder or CO2 fire extinguisher adjacent to the charging area.
