Loading ...
Loading ...
Loading ...
possibly be released to the 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.
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.
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 co
nstructed 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.
7. Repairs to sealed components
1 ) During repairs to sealed components, all electrical supplies shall be
disconnected from the equipment 9)Checks to electrical devices7.
Repairs to sealed components 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.
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 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.
8 9
Loading ...
Loading ...
Loading ...