LG JBNQ18GB2A1, Owner'S Manual

Page: 36 / 48

6)Pipe bending
Annealedcopper pipewith smalldiameter (ø 6.35or ø9.52)can beeasily bentman ually .In
thiscase ,secure largeR(r adius)f orthe bendsection andg radually bendpipe .If annealed
copper pipe is large in diameter (ø12.7, ø 15.88 or ø19.05), bend pipe with bender. Use bender
appropriate for thepipe diameter .
7) Brazing
Inrefr igerant piping,bending (inpar ticular ,acute bending)m ustbe minimized toreduce
pipingresistance .Bending is, how ever ,necessar yin someplaces by virtue ofthe installation
position of
de
vices or of
the b
uilding str ucture, piping distance or finishing appear ance.
Perf orm br azing using ready-made elbow . Aside from this function, br azing
perfor m br azing using
ready-made elbo
w. Aside
from this function, br
azing
also ser ves
to connect str
aight pipes , gener ally using
ready-made soc
kets . While
br
azing,
protectpiping againstheat withw etcloth toa void damagingv alve packing orb urning
thermal insulatorwith bur nerheat. Whilebr azing,b low inert gas(nitrogen gasor carbonic
gas)to prevent for mationof oxidation filmin copperpiping; otherwise, therefr igerant circuit
willclog. Theb lowing ofnitrogen gas(or carbonicgas) through3-w ay valv esis described in
thef ollowing:
8) Refrigerant piping(Flarepiping)
Whenconnecting piping,be sureto keep pipingdr y(keep pipinga wa yfrom water), clean
(keep pipinga wa yfrom dust)and airtight (avoid refriger antleakage).
Whenconnecting pipingon rain yda ysor makinga through-holein wall, take duecare to
prevent water orplaster fromenter ingpiping.
CAUTION
a.This procedureis designedto prevent
for mationof oxidation filmb yfilling piping
withiner tgas .Note thate xcessive gas
pressurewill generate pinholesat braz ed
points.
(Nitrogengas: Supplypressure
2
0.05~0.1kg/cmG)
b. Whensupplying inert gas, besure toopen
oneend ofpiping.
Water enters Plaster enters
13