surrounding space. Prior to work taking place, the area around the equipment is to be surveyed to
make sure that there are no flammable
hazards or ignition risks.
“
No Smoking
”
signs shall be displayed.
7)
Ventilated area
Ensure that the area is in the open or that it is adequately ventilated before breaking into the system
or conducting any hot work. A degree of ventilation shall continue during the period that the work is
carried out. The ventilation should safely disperse any released refrigerant and preferably expel it
externally into the atmosphere.
8)
Checks to the refrigeration equipment
Where electrical components are being changed, they shall be fit for the purpose and to thecorrect
specification. At all timesthemanufacturer’smaintenanceand service guidelines shall be followed.If
in doubt consult the manufacturer’s technicaldepartment for assistance.
The following checks shall be applied to installations using flammable refrigerants:
–
The charge size is in accordance with the room size within which the refrigerant containing parts
are installed;
–
The ventilation machinery and outlets are operating adequately and are not obstructed;
–
If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the
presence of refrigerant;
–
Marking to the equipment continues to be visible and legible. Markings and signs that are illegible
shall be corrected;
–
Refrigeration pipe or components are installed in a position where they are unlikely to be exposed
to any substance which may corrode refrigerant containing components,
unless the components are constructed of materials which are inherently resistant to
being corroded or are suitably protected against being so corroded.
9)
Checks to electrical devices
Repair and maintenance to electrical components shall include initial safety checks and component
inspection procedures. If a fault exists that could compromise safety, then no electrical supply shall
be connected to the circuit until it is satisfactorily dealt with. If the fault cannot be corrected
immediately but it is necessary to continue operation, an adequate temporary solution shall be used.
This shall be reported to the owner of the equipment so all parties are advised.
Initial safety checks shall include:
•
That capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;
•
That there no live electrical components and wiring are exposed while charging, recovering or
purging the system;
•
That there is continuity of earth bonding.
2.Repairs to sealed components
1)
During repairs to sealed components, all electrical supplies shall be disconnected from
the equipment being worked upon prior to any removal of sealed covers, etc. If it isabsolutely
necessary to have an electrical supply to equipment during servicing, then a permanently operating
form of leak detection shall be located at the most critical point to warn of a potentially hazardous
situation.
2)
Particular attention shall be paid to the following to ensure that by working on electrical
components, the casing is not altered in such a way that the level of protection is affected. This shall
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