Hitachi UTOPIA RAS-4HVRP2E - Page 193

9 Servicing
RAS-(4-6)H(V)(R/N)(C/P)2E
SMGB0136 rev.0 - 07/2021
191
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15 Remove the vibration-proof rubber -2- and the vibration-proof rubber -3-.
! CAUTION
• Toremovethecompressortheliquidstopvalvepipeshouldbemoved(bent)totherightsidehand.PAYCLOSEATTENTIONnotto
crushtobreakthepipe.
• Thecompressorisaheavycomponent,twopersonnelarerecommendedtohandleit.
16 Remove the compressor by lifting it up with inclining forward.
17 Install the new vibration-proof rubber -3-.
1
2
3
! CAUTION
• Compressorpipingmustbeconnectedbybrazing.MAKESUREthatanyammablematerialisnotaroundbeforeheatingwithburner,
theoilinsidethepipingmayameup.
• Thereplacementofthecompressorshouldbedoneimmediatelyafterremoving.Sealthesuctionanddischargepipeswhenthere-
frigerantcycleisleftunattachedforalongperiod.
• Forpipingatreassemblingensurethatthecompressorterminalnumbersandwiringmarkbandcodesarematched.
18 Place the new compressor -4- in its place.
19 Protect the compressor side pipping -2- with a wet cloth -3-.
? NOTE
Awetclothwillcoolthecompressorsidepipinginordertoavoidthebrazingmaterialfromenteringthecompressor.
20 Remove the tapes of new compressor right before the brazing and face the piping with the compressor.
21 Insert the pipes fully in to prevent brazing material from entering them.
22 Charge the check joint -1- with nitrogen and rell the compressor piping.
? NOTE
• Besuretoseparatetheblazingburneramesufcientlyfromthewiresandelectricalcomponentsaroundthebrazedpartinorderto
avoidburning.
• PAYCLOSEATTENTIONnottoletthellermetalenterintothecompressorwhichmayresultincompressordamage.
• Refertothetablefortherecommendedamountofbrazingmaterial.Ifusingmorebrazingthantherecommendedamount,itmaydrop
intothepipes.
Thickness of brazing material
Piping diameter (refrigerant cycle side) (mm)
Ø6.35 Ø9.5 Ø12.7 Ø15.9 Ø19.1 Ø22.2 Ø28.2
Ø1.6mm 25 30 35 75 100 110 225
Ø2.0mm 15 15 20 45 55 70 135
Ø2.4mm 10 10 15 30 35 45 90