Refrigerant Piping - Airo ORIA Serie Manual De Usuario

4. Refrigerant Piping

Use refrigerant R32 in the refrigerant cycle (refer to outdoor nameplate). Do not charge oxygen,
acetylene or other flammable and poisonous gases into the refrigerant cycle when performing a
leakage test or an air-tight test. These type of gases are extremely dangerous and can cause an
explosion. lt is recommended that nitrogen be used for these type of tests.
4. 1 The Piping Materials
Prepare locally-supplied copper pipes.
(1)
Select the piping size from the following table.
(2)
Model Gas pipe(mm)
26-35
52
71-90
105-175
Select clean copper pipes. Make sure there is no dust and moisture inside. Blow the pipes with nitrogen
(3)
or dry air to remove dust and foreign materials before connecting pipes.
4. 2 The Piping Connection
(1) Position of piping connection is shown in Fig. 4. 1. (lndoor Unit)
.... "'
26-52
When tightening the fiare nut, use two spanners as shown in Fig.4.2.
(2)
i�DANGER
Liquid pipe(mm)
09.52 06.35
012.7 06.35
015.88 09.52
019.05 09.52
;:._
Fig. 4 .1 Position of Piping Connection
Pipe Size(mm) Tightening Torque N.m
<1>6.35
cj>9.52
<1>12.7
<!>15.88
<1>19.05
Fig. 4 .2 Tightening Work of Fiare Nut
lnstallation and Maintenance
Q)
-------�-
a.
o:
Q)
o: a.
1
"O
1
"'
·5
1
(/)
1
¿ �
1
1
:�
CX)
840 (Unit)
180 (Liquid Pipe)
110 (Gas Pipe)
71-175
20
40
60
80
100
51
(mm)
·e: 1
1
2-
1
1
1
1
;¡!;
1
1
Liquid Pipe Connection