Hitachi CH Series Installation And Operation Manual page 10

4
STRUCTURE
2.2.2. CH Unit – CH-12.0N
To Indoor Unit
High
Pressure
Gas Line
Low
Pressure
Gas Line
Refrigerant Flow Direction (Cooling Operation)
Refrigerant Flow Direction (Heating Operation)
No Description
1 Solenoid Valve (AC)
2 Strainer
3 Check Valve
4 Capillary Tube
5 Capillary Tube
NOTE:
The mark of inside "[ ]" is shown in the electrical wiring diagram.
To Outdoor Unit
Flare Connection
Flange Connection
Brazing Connection
Field Refrigerant Piping
Material Size
Mark
O.D.(mm) × thickness (mm)
∅6.35 x 1.07
a
∅12.7 x 1.0
b
∅15.88 x 1.0
c
∅15.88 x 1.2
d
∅19.05 x 1.2
e
∅19.05 x 1.65
f
∅3.0 x 0.8
g
∅4.0 x 0.5
h
∅22.2
j
∅19.05
k
High Pressure
Gas Line
Low
Pressure
Gas Line
Low
Pressure
Gas Line
Material
Copper Tube
C1220T-O