Hitachi RAS-3HVRNM2 - Page 28

2-100
TC-12001
OUTDOOR UNIT
24
P5414950-rev.1
(2) Use the branch pipe kit surely to the distributing pipe.
Do not use the T-Joint. Fix the branch pipes horizontally to the pillar, wall or ceiling.
NOTE:
:UDSWKHEUDQFKSLSHVZLWKDQLQVXODWLRQRUDSDGDQGWKHQ¿[WKHPRQWKHZDOOZLWKWKH¿[LQJSODWHV
O
Installation Posture of Branch Pipes
(3) Ensure the branch pipes position and height
difference between indoor units according to
WKHULJKW¿JXUH
NOTE:
)L[WKHSLSLQJIURPWKH
piping insulation above by
D¿[LQJSODWHRULQVHUWLQJ
the cushioning between the
piping and the plate when
¿[LQJWKHSLSLQJE\WKHSODWH
Cooling Heating
Check Joint of
Gas Stop Valve
A
Low Pressure High Pressure
Check Joint of Piping
B
High Pressure Low Pressure
Check Joint of
Liquid Stop Valve
C
([FOXVLYHIRU9DFXXP3XPSDQG
Refrigerant Charge
The gas stayed at
O-ring screw part
LVRSHQHGDQGPD\
PDNHVRXQGZKHQ
UHPRYLQJWKHFDS
However, it is not gas
leakage.
NOTE:
Pay attention not to splash the refrigerant and the oil to
WKHHOHFWULFDOER[RUWKHHOHFWULFDOSDUWVZKHQUHPRYLQJ
the charge hose.
(4) 3UHVVXUH0HDVXUHPHQWE\&KHFN-RLQW
Use the check joint (the gas stop valve “
A
” and the piping “
B
´WRPHDVXUHWKHSUHVVXUH
,QWKLVWLPHFRQQHFWDPDQLIROGJDXJHDFFRUGLQJWRWKHWDEOHEHORZEHFDXVHKLJKDQGORZSUHVVXUHV
are interchanged depending on the operation (cooling or heating).
Keep Horizontal
Keep Hor
izontal
Keep Hor
izontal
Branch Connection
To Indoor Unit To Indoor Unit
To Outdoor Unit
Keep Vertical
Fixing the Branch Pipe to
Ceiling Surface or Beam
Fixing the Branch Pipe
to the surface of Pillar or Wall.
Main Pipe
Main Pipe
Main Pipe
Main
Pipe
Branch
Connection
Branch
Connection
Branch
Connection
Branch
Connection
Branch Pipe
Branch
Pipe
Branch Pipe Branch Pipe
Branch Pipe
Branch Pipe
Bending
Radius
Min.
0.5m
Min.
0.5m
Min.
0.5m
CORRECT CORRECT INCORRECT INCORRECT
Upper Side Upper Side Upper Side Upper Side
C
B
A
Height
Difference
Max.
0.5m
Max.
0.5m
Indoor Unit
Indoor Unit
(In Case of Twin Type)