ARIETE 9020 - Page 26

suretoenableworktotakeplace.Thisoperationisabsolutelyvitalifbrazingoperationson
thepipe-workaretotakeplace.Ensurethattheoutletforthevacuumpumpisnotcloseto
anyignitionsourcesandthereisventilationavailable.
15. Charging procedures
Inadditiontoconventionalchargingprocedures,thefollowingrequirementsshallbefol-
lowed.
- Ensurethatcontaminationofdi󰀨erentrefrigerantsdoesnotoccurwhenusingcharg-
ingequipment.Hosesorlinesshallbeasshortaspossibletominimisetheamountof
refrigerant contained in them.
- Cylindersshallbekeptupright.
- Ensure that the refrigeration system is earthed prior to charging the system with refrig-
erant.
- Labelthesystemwhenchargingiscomplete(ifnotalready).
- Extremecareshallbetakennottooverlltherefrigerationsystem.
PriortorechargingthesystemitshallbepressuretestedwithOFN.Thesystemshallbe
leaktestedoncompletionofchargingbutpriortocommissioning.Afollowupleaktestshall
becarriedoutpriortoleavingthesite.
16. Decommissioning
Before carrying out this procedure, it is essential that the technician is completely familiar
withtheequipmentandallitsdetail.ltisrecommendedgoodpracticethatallrefrigerants
arerecoveredsafely.Priortothetaskbeingcarriedout,anoilandrefrigerantsampleshall
betakenincaseanalysisisrequiredpriortore-useofreclaimedrefrigerant.ltisessential
thatelectricalpowerisavailablebeforethetaskiscommenced.
a) Becomefamiliarwiththeequipmentanditsoperation.
b) Isolatesystemelectrically.
c) Before attempting the procedure ensure that:
• mechanicalhandlingequipmentisavailable,ifrequired,forhandlingrefrigerantcylin-
ders;
• allpersonalprotectiveequipmentisavailableandbeingusedcorrectly;therecovery
processissupervisedatalltimesbyacompetentperson;recoveryequipmentand
cylinders conform to the appropriate standards.
d) Pumpdownrefrigerantsystem,ifpossible.
e) lfavacuumisnotpossible,makeamanifoldsothatrefrigerantcanberemovedfrom
various parts of the system.
f) Makesurethatcylinderissituatedonthescalesbeforerecoverytakesplace.
g) Start the recovery machine and operate in accordance with manufacturer’s instruc-
tions.
h) Donotoverllcylinders.(Nomorethan80%volumeliquidcharge).
i) Donotexceedthemaximumworkingpressureofthecylinder,eventemporarily.
j) Whenthecylindershavebeenlledcorrectlyandtheprocesscompleted,makesure
thatthecylindersandtheequipmentareremovedfromsitepromptlyandallisolation
valvesontheequipmentareclosedo󰀨.
k) Recoveredrefrigerantshallnotbechargedintoanotherrefrigerationsystemunlessit
hasbeencleanedandchecked.
17. Labelling
Equipment shall be labelled stating that it has been de-commissionedand emptied of
refrigerant.Thelabelshallbedatedandsigned.Ensurethattherearelabelsontheequip-
mentstatingtheequipmentcontainsammablerefrigerant.
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