Daewoo FR-420N Service Manual page 28

S VC process
NO.
Remov ing the
4
remaining ref.
Remov ing the
5
pinch-plier & pipe
Ex changing comp
6
& dry er
W elding
7
Disassembly
of charging v alv e
8
(Coupling pipe)
Image
1. And then, connect the vacuum pump
to the outlet of discharging hose
※ Vacum pump should be placed at
the outdoor where is able to clear air easily.
※ It should have enough time
more than 10 minutes to discharge.
1. Disassembe the each pipe (Del-pipe,
Suc-pipe, Capi-pipe, Dryer & Hot-pipe)
※ Caution ; A part is easily damaged
by flame so that disassemly should
be done carefully.
1. Change the comp. & dryer.
※ You should check the comp. spec.
and assemble correctly.
1. Weld the each pipe.
※
O
△
Valve Ass'y
1. Decap the couplig pipe cap and
Valve Ass'y
disassemble the vlave ass'y.
※ If you don't disassemble, the coupling
rubber would be melted.
27
How To Charge R-600a Refrigerant
Details
Copper-Copper welding - 5% rod
Copper-Steel welding - 35% rod
30% rod