Hitachi airCore 700 Operation Installation Maintenance Manual page 26

5. Refrigerant Piping Work
(1) Position of piping connection is shown below.
PPIH-3.0UFA1NQ
PPIH-4.0UFA1NQ
PPIH-5.0UFA1NQ
PPIH-6.0UFA1NQ
PPIH-6.5UFA1NQ
Perform the flaring work as shown below.
(2) When tightening the flare nut, use two spanners as shown in Fig.5.2.
(3) After connecting the refrigerant piping, seal the refrigerant pipes by using the factory-supplied
insulation material as shown in Fig.5.3.
95
81
90
Fig.5.1 Position of Piping Connection
Model Gas Piping
Φ15.88(5/8)
90 + 2
º º
ΦA
0.4 ~ 0.8R
Φd
Pipe Size (mm (in.))
Φ6.35mm(1/4)
Φ9.53mm(3/8)
Φ12.7mm(1/2)
Φ15.88mm(5/8)
Fig.5.2 Tightening Work of Flare Nut
Cord Clamp
(Factory-Supplied)
Unit
Side
Insulation Material
(Factory-Supplied)
Fig.5.3 Insulation on Pipes
Refrigerant Gas Pipe Connection
432
Refrigerant Liquid Pipe Connection
377
361
Drain Pipe Connection
Unit: mm (in.
Liquid Piping
Φ12.7(1/2) Φ6.35(1/4)
Φ9.53(3/8)
Unit: mm (in.)
Diameter
Ød
Ø6.35(1/4)
Ø9.53(3/8)
Ø12.7(1/2)
Ø15.88(5/8)
Tightening Torque (N·m)
100
Insulation for
Refrigerant Pipe
(Factory-Supplied)
Refrigerant Pipe
(Field-Supplied)
Insulation for
Refrigerant Pipe
(Field-Supplied)
-13-
Unit: mm
)
+0
A
-0.4
R32
9.1
13.2
16.6
19.7
20
40
80