Indoor Unit Refrigerant Piping; Piping Materials; Piping Connection - Hitachi air Core 600 Installation & Maintenance Manual

Cut off the excess length
of bolts to avoid difficulties
in movement in future.
Fig.4.3 The installation of anchor bolts
Fig. 4.4
5. Refrigerant Piping

5.1 Piping Materials

(1) Prepare locally-supplied copper pipes.
(2) Select the piping size from the following table.
Model Capacity
(Btu/h)
18K
25K/30K/36K/42K/48K/55K
(3) Select clean copper pipes. Make sure there is no






dust and moisture inside the copper tubing. Blow





the pipes with nitrogen or dry air to remove dust
and foreign debris before connecting pipes.
beton anchor bolt
Setscrew
(at least 4)
Min.10cm
Wire ropes
Fig. 4.5
Gas pipe(mm) Liquid pipe(mm)
ø12.7 ø6.35
ø15.88 ø9.52
Installation and Maintenance

5.2 Piping Connection

(1) Position of piping connection is shown in Fig. 5.1.(Indoor Unit)
149 (Liquid Pipe)
101 (Gas Pipe)
5
(2) When tightening the flare nut, use two spanners
as shown in Fig. 5.2.
5
(3) After connecting the refrigerant piping, seal the
refrigerant pipes by using the factory-supplied
insulation material as shown in Fig
Cord Clamp
(Factory-Supplied)
Unit Side
Insulation Material
(Factory-Supplied)
Fig
CAUTION
● Cover the end of the pipe with a cap while inserting
the pipe through a hole.
● Do not place pipes on the ground directly without
a cap or vinyl tape at the end of the pipe.
32
(Unit : mm)
840 (Unit)
Liquid Pipe Connection
Gas Pipe Connection
Piping
Pipe Size Tightening Torque
(mm) (N m)
ø6.35
ø9.52
ø12.7
ø15.88
ø19.05
.
Insulation for
Refrigerant Pipe
(Factory-Supplied)
(F ield -Supplied)
Insulation for
Refrigerant Pipe
(F ield -Supplied)
5 3 Insulation on Pipes
. .
·
20
6
5.3.