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of other qualified personnel must be performed under the supervision of an
individual specified in the use of flammable refrigerants.
● Ducts connected to an appliance shall not contain a potential ignition source.
INSTRUCTIONS FOR REPAIRING APPLIANCES CONTAINING R290
1 GENERAL INSTRUCTIONS
1.1 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 con-ducting work on the system.
1.2 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.
1.3 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 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.
1.4 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 tection equipment being used is suitable for
use with flammable refrigerants, i.e. nonsparking, adequately sealed or
intrinsically safe.