Refrigerant Piping - Hitachi RCI-2.5-FSN3Ei Installation And Operation Manual

REFRIGERANT PIPING

- Secure the indoor unit using the nuts, washers.
Gas piping
connection
Liquid piping
Panel (to be installed
Drain piping
later, shown only as
connection
a reference)
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N O T E
• 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 wash-
ers. (These nuts and washers are supplied, 4 pieces each)

Adjusting the space between indoor units and
false ceiling opening
- Adjust the indoor unit to the correct position while
checking with the pattern for installation.
Checking scale for dimension of opening
4 REFRIGERANT PIPING
4.1 PIPING CONNECTION
4.1.1 Piping Position
Position of piping connection is the following, which is available
from all directions, top, left or right.
5 PMML0253A rev.5 - 08/2016
Suspension bolts (4)
False ceiling
Suspension
bracket
Open the knockout
hole for wiring (Ø32,5)
Wiring hole (30x30)
Pattern board for installation
Packing (Corrugated board)

For ceiling already completed with panels.
Attach this side of the scale
to the inner side of the
opening of the ceiling
Indoor unit
Attach this side
of the scale to
the outer side of
the unit
Checking scale
Check the dimension
of opening at each
side of the unit

Ceiling not completed with panels yet.
Pattern paper for installation
Dimension
for opening
Suspension bolt
Surface
of
ceiling
- 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.
4.1.2 Size of piping connection

Piping size
 Gas piping
RCI-1.0/1.5 Ø 12.70 (1/2)
RCI-2.0
Ø 15.88 (5/8)
RCI-2.5-6.0

Thickness of Copper Pipes
Nominal Diameters Outer Diameters
1/4
3/8
1/2
5/8
Attach this side of the scale
to the lower side of the unit
Indoor unit
Attach this side
of the scale
Ceiling panel
to the ceiling
Checking scale
Check the height of the
ceiling at each corner
of the unit
Dimension
for
opening
Unit
Screw
(M6)
Pattern board for installation
mm (in)
 Liquid piping
Ø 6.35 (1/4)
Ø 9.52 (3/8)
(mm)
Thickness
6.35 0.80
9.52 0.80
12.70 0.80
15.88 1.00
panel