Hitachi RAS-3-HVNC - Page 75

3. Piping work and refrigerant charge
61
SMGB0079 rev.0 - 01/2013
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 con-
nection
Do not work with
two spanners
here.
Refrigerant
leakage shall
occur
Position to apply
spanners
Don 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brea-
thingorharmfulgaseswouldoccurifarewasbeingusedintheroom.