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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.
CHECKS TO THE REFRIGERATION EQUIPMENT
· Where electrical components are being changed, they shall be fit for the purpose
and to the correct specification. At all times the manufacturer’s maintenance and
service guidelines shall be followed. If in doubt consult the manufacturer’s technical
department 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.
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.
REPAIRS TO SEALED COMPONENTS
· 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 is absolutely
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.
· Particular attention shall be paid to the following to ensure that by working on electrical
