Beko BA 310 AC Manuel D'utilisation page 18

2 Warn ngs (for us ng R290 refr gerant only)
un t safe. Th s process may need to be repeated several t mes.
Compressed a r or oxygen shall not be used for th s task.
Flush ng shall be ach eved by break ng the vacuum n the system
w th OFN and cont nu ng to f ll unt l the work ng pressure s
ach eved, then vent ng to atmosphere, and f nally pull ng down to a
vacuum. Th s process shall be repeated unt l no refr gerant s w th n
the system. When the f nal OFN charge s used, the system shall be
vented down to atmospher c pressure to enable work to take place.
Th s operat on s absolutely v tal f braz ng operat ons on the p pe-
work are to take place. Ensure that the outlet for the vacuum pump s
not close to any gn t on sources and there s vent lat on ava lable.
13. Charg ng procedures
In add t on to convent onal charg ng procedures, the follow ng
requ rements shall be followed. Ensure that contam nat on
of d fferent refr gerants does not occur when us ng charg ng
equ pment. Hoses or l nes shall be as short as poss ble to m n m se
the amount of refr gerant conta ned n them.
Cyl nders shall be kept upr ght.
Ensure that the refr gerat on system s earthed pr or to charg ng the
system w th refr gerant.
Label the system when charg ng s complete ( f not already).
Extreme care shall be taken not to overf ll the refr gerat on system.
Pr or to recharg ng the system t shall be pressure tested w th OFN.
The system shall be leak tested on complet on of charg ng but pr or
to comm ss on ng. A follow up leak test shall be carr ed out pr or to
leav ng the s te.
18 / 224 EN Local air conditioner