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Pagina 25
Eliminarea aerului din instalatie 9
ATENTIE
Folositi o pompa de vid cu o capacitate de
-0.1MPa si capcitatea de evacuare a aerului
peste 40L/min.
Unitatea exterioara nu trebuie vidata. NU
DESCHIDETI supapele de gaz si lichid.
Asigurati-va ca indicatorul aseaza o valoare
de maxim -0.1MPa dupa 2 ore. Dupa 3 ore de
functionare, valoarea asata este de peste
-0.1MPa, vericati daca exista o scurgere
de gaz sau apa in conducta. Daca nu exista
scurgeri, faceti o alta vidare timp de 1-2 ore.
NU folositi agent frigoric la vidarea
sistemului.
1. Conectati furtunul de incarcare al colectorului
la supapa de presiune scazuta a unitatii
exterioare.
2. Conectati un alt furtun de incarcare de la
indicatorul colectorului, la pompa de vid.
3. Deschideti supapa de presiune scazuta a
colectorului si mentineti supapa de presiune
ridicata inchisa.
4. Porniti pompa de vid pentru a etansa sistemul.
5. Mentineti pompa de vid cel putin 15minute sau
pana indicatorul combinat aseaza -76cmHG(-
1x105Pa)
6. Inchideti supapa de presiune scazuta a
colectorului si opriti pompa.
7. Asteptati 5 minute si apoi vericati daca exista
schimbari in presiunea sistemului.
NOTA: Daca nu exista schimbari in presiunea
sistemului, desurubati capacul supapei de
presiune ridicata. Schimbarea presiunii
sistemului poate indica o scurgere de gaz.
8. Deschideti supapa de inalta presiune cu
ajutorul unei chei hexagonale (imbus),
intorcand in sensul acelor de ceasornic, 1/4
dintr-o miscare completa.
Veti auzi cum gazul este evacuat din sistem.
Dupa 5 secunde puteti inchide supapa.
Inainte de folosirea unei pompe de vid cu
colector, cititi manualul de utilizare pentru a va
familiariza cu acest echipament.
Precautii
Instructiuni pentru vidarea instalatiei
DESCHIDETI SUPAPELE CU GRIJA
9. Urmariti indicatorul de presiune pentru
1 minut, pentru a va asigura ca nu apar
schimbari. Indicatorul va asa o valoare usor
mai mare decat presiunea atmosferica.
10. Inlaturati furtunul de incarcare de la supapa
de service.
11. Folosind cheia xa hexagonala, deschideti
complet atat supapa de inalta presiune cat si pe
cea de presiune scazuta.
12. Strangeti capacele supapelor cu mana si apoi
cu o unealta corespunzatoare.
Atunci cand deschideti supapele, intoarceti
cheia xa hexagonala pana cand ajunge
la opritor. NU FORTATI deschiderea
suplimentara a supapei.
Indicator colector
Piulita expansiune
Capac
Trunchiul supapei
Corpul supapei
Indicator presiune
Indicator combinat
-76cmHg
Supapa presiune scazuta
Furtun incarcare
Supapa presiune scazuta
Pompa vid
Furtun incarcare
Supapa inalta
presiune
Fig. 9.1
Fig. 9.2
95


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