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1. 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.
1. 8 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.
1. 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
2. 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 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.
Servicing shall be performed only as recommended by the manufacturer.
The appliance shall be stored in a well-ventilated area where the room size
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