Refrigerant Piping Work; Piping Materials; Piping Connection - Hitachi RCI-1.0FSN3 Installation & Maintenance Manual

5.

Refrigerant Piping Work

(R410A) to the outdoor unit in the refrigerant
cycle. Do not charge material other than R410A
into the unit such as hydrocarbon refrigerants
(acetylene or etc.) or poisonous gases when
installing, maintaining and moving. These
5.1

Piping Materials

(1) Prepare locally-supplied copper pipes.
(2) Select the piping size from the following
table.
Model
RCI-1.0FSN3
RCI-1.5FSN3
RCI-2.0FSN3
RCI-2.5FSN3
RCI-3.0FSN3
RCI-4.0FSN3
RCI-5.0FSN3
RCI-6.0FSN3
(3) Select clean copper pipes. Make sure there
is no dust and moisture inside. Use a pipe
cutter to avoid a grind swarf generation for
the pipe cutting work. (Do not use a saw
or a grind stone to cut pipes.) Blow the
inside of the pipes with nitrogen or dry air, to
remove any dust or foreign materials before
connecting pipes.
P5414946-rev.1
TC-12001
mm (in.)
Gas Piping Liquid Piping
12.7 (1/2) 6.35 (1/4)
15.88 (5/8) 6.35 (1/4)
15.88 (5/8) 9.52 (3/8)
5.2

Piping Connection

(1) Position of piping connection is shown in
Fig. 5.1. (Indoor Unit)
95 (GasPipe)
160 (Liquid Pipe)
Gas Pipe Connection
Fig. 5.1 Position of Piping Connection
(2)
90 o + 2 o
A
0.4 ~ 0.8R
d
4-WAY CASSETTE
(mm)
Liquid Pipe Connection
30
mm (in.)
+0
Diameter
A
( d)
-0.4
6.35 (1/4) 9.1
9.52 (3/8) 13.2
12.7 (1/2) 16.6
15.88 (5/8) 19.7
15
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