Piping Materials; Piping Connection - Hitachi air Core 700 Operation Installation Maintenance Manual

5. Refrigerant Piping Work

5.1 Piping Materials

(1) Prepare locally-supplied copper pipes suitable for use with R32 refrigerant and comply with local
regulations.
(2) Select the piping size from the following table.
(3) Select clean copper pipes. Make sure there is no dust and moisture inside. Blow the inside of the
pipes with nitrogen or dry air, to remove any dust or foreign materials before connecting pipes.

5.2 Piping Connection

(1) Position of piping connection is shown in Fig.5.1.
(a) Piping from Rear Side
(b) Piping from Upper Side
Table 5.1 Piping Size
Model(HP)
2.0-3.0
4.0-6.0
Air inlet grille
Fig.5.1 Piping Connection of Indoor Unit
Resin
Side Cover
Drain piping
Gas Piping
Φ 12.7 (1/2)
Φ 15.88 (5/8)
Gas Liquid
piping
piping
Drain Piping
P View
Knock out
hole
Gas
Liquid
piping
piping
Drain Piping Connection
in drain pan
Knock out hole
piping
piping
-12-
mm (in.)
Liquid Piping
Φ 6.35 (1/4)
Φ 9.53 (3/8)
Unit: mm
P View
Unit: mm