Hitachi RAS-(4-12)HNP(1)(E) - Page 85

3 Piping work and
refrigerant charge
71
SMGB0087 rev.0 - 12/2013
3
Hexagonal wrench size used for spindle valve:
(*) Size 2HP,2.5HP 3HP,4-6HPStandard 4-6HPPremium,8-12HP
Gas valve 4 mm 5 mm -
Liquid valve 4 mm 4 mm 4 mm
Do not apply two spanners at
this position. If applied,
leakage will occur.
Stop valve
(Spindle type)
Flare nut
Use two spanners
here for pipe
connection
Do not work with
two spanners
here.
Refrigerant
leakage shall
occur
Position to apply
spanners
Do not apply two
spanners work here
Spindle type Ball type
 C A U T I O N
• Atthetestrun,fullyopenthespindleandballstopvalve.
• Ifnotfullyopened,thedeviceswillbedamaged.
• Donotattempttoturnservicevalverodbeyonditsstop.
• Donotloosenthestopring.Ifthestopringisloosened,itisdangeroussincethespindlewillhopout.
• Anexcessorashortageofrefrigerantisthemaincauseoftroubletotheunits.Chargethecorrectrefrigerantquantity
accordingtothedescriptionoflabelattheinsideofservicecover.
• Check for refrigerant leakage in detail. Ifalargerefrigerantleakageoccurs,itwillcausedifcultywithbreathingor
harmfulgaseswouldoccurifarewasbeingusedintheroom.