Refrigerant Piping - Hitachi RCI-1.0 FSN3Ei Installations- Und Betriebshandbuch

REFRIGERANT PIPING

- Secure the indoor unit using the nuts, washers.
Gas piping
connection
Liquid piping
Panel (to be installed
later, shown only as
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)
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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.
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Suspension bolts (4)
False ceiling
Suspension
bracket
Open the knockout
hole for wiring (Ø32,5)
Drain piping
connection
Wiring hole (30x30)
Pattern board for installation
Packing (Corrugated board)
5 PMML0253A rev.5 - 08/2016
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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
Ceiling panel
the outer side of
the unit
Checking scale
Check the dimension
of opening at each
side of the unit
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Ceiling not completed with panels yet.
Pattern paper for installation
Dimension
for opening
Suspension bolt
Surface
of
ceiling Pattern board for installation
- 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
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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
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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
to the ceiling
panel
Checking scale
Check the height of the
ceiling at each corner
of the unit
Dimension
for
opening
Unit
Screw
(M6)
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