Hitachi P-N23NA2, Installation And Operation Manual

Page: 41 / 340

4 REFRIGERANT PIPING
4.1 PIPING CONNECTION
4.1.1 Piping Position
(mm)
84
90 76
95
160
157 140
ø30
(Liquid pipe)
(Gas pipe)
(Gas pipe)
(Liquid pipe)
(mm)
84
90 76
95
160
157 140
ø30
Gas pipe connection Liquid pipe connection
(Gas pipe)
(Liquid pipe)
4.1.2 Size of piping connection

Piping size
mm (in)
Liquid piping Gas piping
RCI-(1.0-2.0) Ø 6.35 (1/4) Ø 12.70 (1/2)
RCI-(2.5-6.0) Ø 9.52 (3/8) Ø 15.88 (5/8)

Thickness of Copper Pipes
Ø (in) Ø (mm) Thickness (mm)
1/4 6.35 0.80
3/8 9.53 0.80
1/2 12.70 0.80
5/8 15.88 1.00
Flare Pipe Dimensions
Ø (in) Ø (mm)
A +0/-0.4
(mm)
1/4 6.35 9.1
3/8 9.52 13.2
1/2 12.70 16.6
5/8 15.88 19.7

Flare Nut Dimensions
Nominal
diameter (in)
Nominal
diameter
(mm)
B (mm)
1/4 6.35 17
3/8 9.53 22
1/2 12.70 26
5/8 15.88 29
5 DRAIN PIPING
5.1 GENERAL INFORMATION
I NCORRECT CORRECT
Incorrect: Upward Slope
Incorrect: Rising Part
Common drain piping (Min.VP30)
Vinyl chloride pipe (VP25)
Min. 100mm
(higher as possible)
Drain piping of unit side
(Down slope from rising part)
This drain piping shall
be separating from
others pipes
1/25 to 1/100
Down-Slope
REFRIGERANT PIPING
PMML0547 rev.0 - 11/2020 7
EN