LG LB-R0551QC, Руководство пользователя

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6)Pipe bending
Annealedcopper pipewith smalldiameter (ø 6.35or ø9.52)can beeasily bentmanually .In
thiscase, securelarge R(radius)for thebend sectionand graduallybend pipe.If annealed
copper pipe is large in diameter (ø12.7, ø15.88 or ø 19.05), bend pipe with bende r. Use bender
appropriatefor thepipe diameter.
7) Brazing
Inrefrigerant piping,bending (inparticular ,acute bending)must beminimized toreduce
pipingresistance. Bendingis, however, necessaryin someplaces byvirtue ofthe installation
position of devices or of the building structure, piping distance or finishing appearance.
Perform brazing using ready-made elbow. Aside from this function, brazing
perform brazing using ready-made elbo w. Aside from this function, brazing
also serves to connect straight pipes, generally using ready-made sockets. While brazing,
protectpiping againstheat withwet clothto avoiddamaging valvepacking orburning
thermalinsulator withburner heat.While brazing,blow inertgas (nitrogengas orcarbonic
gas)to preventformation ofoxidation filmin copperpiping; otherwise,the refrigerantcircuit
willclog. Theblowing ofnitrogen gas(or carbonicgas) through3-way valvesis describedin
thefollowing:
8)R efrigerantpiping(Flare piping)
Whenconnecting piping,be sureto keeppiping dry(keeppiping awayfrom water),clean
(keeppiping awayfrom dust)and airtight(avoid refrigerantleakage).
Whenconnecting pipingon rainydays ormaking athrough-hole inwall, takedue careto
preventwater orplaster fromentering piping.
17
Water enters Plaster enters
(Nitrogengas: Supplypressure
2
0.05~0.1kg/cmG)
CAUTION
a. This procedure is designed to prevent formation of oxidation film by filling piping with
inert gas. Note that excessive gas pressure will generate pinholes at brazed points.
b. When supplying inert gas, be sure to open one end of piping.