Hitachi P-G23WA2 User Manual

3
REFRIGERANT PIPING
3
NOTE:
- If a false ceiling has already been installed, complete
all piping and wiring work inside the ceiling before
hooking-up the indoor unit.
- Secure the indoor unit using the nuts, flat washers
and spring washers. (These nuts and washers are
supplied, 4 pieces each).

Adjusting of Space Between Indoor Units and
False Ceiling Opening
- Check the level of the drain pan by a water level to avoid
incorrect operation of the drain discharge mechanism in
the indoor unit.
- Tighten the nuts of the suspension brackets after the
adjustment is completed. Apply LOCK-TIGHT paint to the
bolts and nuts in order to prevent them from loosening. If
not done, abnormal noises or sounds may occur and the
indoor unit may come loose.
- Adjust the indoor unit to the correct position while
checking with the pattern for installation.
1. For ceiling already completed with panels.
2. Ceiling not completed with panels yet.
3. REFRIGERANT PIPING
3.1. PIPING CONNECTION
3.1.1. PIPING POSITION
Position of piping connection is the following, which is
available from all directions, top, left or right.
3.1.2. SIZE OF PIPING CONNECTION
 In case of R407C
(mm)
Model RCI 1.0/1.5 2.0 2.5/3.0/3.5 4.0/5.0/6.0
o
Gas Piping 12.7 15.88 15.88 19.05
p
Liquid Piping 6.35 6.35 9.53 9.53
 In case of R410A
(mm)
Model RCI 1.0/1.5 2.0 2.5/3.0/3.5 4.0/5.0/6.0
o
Gas Piping 12.7 15.88 15.88 15.88
p
Liquid Piping 6.35 6.35 9.53 9.53
 Special instructions for R410A
As R410A pressure is about 1.4 times higher than R407C,
improper installation may cause a serious trouble.
It is necessary to use the copper pipes, size of flare pipe
ends and flare nuts as shown below.

Flare Pipe Dimensions
(mm)
A
+0/-0.4
Nominal
Diameters
Outer
Diameters
R407C R410A
1/4 6.35 9.0 9.1
3/8 9.53 13.0 13.2
1/2 12.70 16.2 16.6
5/8 15.88 19.4 19.7
 Thickness of Copper Pipes
(mm)
Nominal
Diameters
Outer
Diameters
R407C R410A
1/4 6.35 0.80 0.80
3/8 9.53 0.80 0.80
1/2 12.70 0.80 0.80
5/8 15.88 1.00 1.00
 Flare Nut Dimensions
(mm)
B
Nominal
Diameters
Outer
Diameters
R407C R410A
1/4 6.35 17 17
3/8 9.53 22 22
1/2 12.70 24 26
5/8 15.88 27/29 29
Indoor Unit
A
ttach this side of
the scale to the
ceiling Panel
A
ttach this side of the scale to the
lower side of the unit
Check the height of the
ceiling at each corner of
the unit
Checking
Scale
A
ttach this side of the scale to the inne
r
side of the opening of the ceiling
A
ttach this side
of the scale to
the outer side
of the unit
Indoor Unit
Checking
Scale
Ceiling
panel
Check the dimension
of opening at each
side of the unit
Dimension for Opening
Dimension for Opening
Pattern Paper for Installation
Pattern Board
for Installation
Screw (M6)
Surface of Ceiling
Unit
Pattern Board for
Installation
Packing
(Corrugated Board)
Checking Scale for Dimension
of Opening
Suspension Bolt

Hitachi P-G23WA2 Specifications

General

Brand	Hitachi
Model	P-G23WA2
Category	Air Conditioner
Language	English