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g. 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 wok. 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.
h. 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 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
i. Checks to electrical devices
Repair and maintenance to electrical components shall include initial safety checks and
components 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
j.
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 components, the casing is not altered in such a way that the level
of protection is affected. This shall include damage to cables, excessive number of connections,
terminals not made to original specification, damage to seals, incorrect fitting of glands,etc.
Ensure that apparatus is mounted securely.Ensure that seals or sealing materials have not
degraded such that they no longer serve the purpose of preventing the ingress of flammable
atmospheres, Replacement parts shall be in accordance with the manufacturer’s specifications.
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