INVENTOR ΑΤΜ-25L Manuel D'utilisateur page 25

ignition sources, including cigarette smoking, should be kept sufficiently far away from the
site of installation, repairing, removing and disposal, during which flammable refrigerant
can 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.
6. 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.
7. 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 check 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;
8. 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 wring are exposed while charging, recovering
or purging the system;
--that there is continuity of earth bonding.
9. 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 in electrical
components, the casing is not altered in such a way that level of protection is affected. This
shall include damage to cables, excessive numble of connection, terminals not made to
original specification, damage to seals, incorrect fitting of glands, etc.
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,
NOTE The use of silicon sealant may inhibit the effectiveness of some types of leak
detection equipment. Intrinsically safe components do not have to be isolated prior to
working on them.
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EN