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CAUTION
8. INSTALL THE CONNECTING PIPE
Check whether the height drop between the indoor unit
and outdoor unit, the length of refrigerant pipe, and the
number of the bends meet the following requirements:
All field piping must be provided by a licensed
refrigeration technician and must comply with the
relevant local and national codes.
Do not let air, dust, or other impurities fall in the pipe
system during the time of installation.
The connecting pipe should not be installed until the
indoor and outdoor units have been fixed already.
Keep the connecting pipe dry, and do not let moisture in
during installation.
The Procedure of Connecting Pipes
8.1
Table 8-1
Model
12K
18K-24K
30K-42K
12K
18K-24K
30K-60K
48K-60K
<15K
>15K~<24K
>24K~<36K
>36K~<60K
50Hz T1 condition/R22
Split type air conditioner
50Hz Vertical discharge air conditioner
/60Hz T1 condition/R22 Split type air
conditioner and Vertical discharge air
conditioner
The type of models
R410A inverter Split type air
conditioner and Centrifugal
fan outdoor unit
50
30
15
50
30
15
30
65
30
25
50
R410A Split type air conditioner
and Centrifugal fan outdoor unit
50Hz/60Hz T3 condition
(outdoor unit down)
50Hz/60Hz T3 condition
(outdoor unit up)
the unit with quick joint
12K
48K-60K
18K-30K
36K
18K-24K
42K-60K
30K
36K
18K-24K
12K-18K
48K-60K
42K
30K
36K
50
25
15
30
50
30
25
30
25
50
30
30
50
15
35
5 5
25
20
30
25
15
8
20
25
15
10
20
30
20
10
25
25
10
8
20
10
8
20
refrigerant pipe
The length of
height drop
The max
CAUTION
How to connect the pipes
Drill a hole in the wall (suitable just for the size of the wall
conduit), then set on the fittings such as the wall conduit and
its cover.
Bind the connecting pipe and the cables together tightly with
binding tapes.
Pass the bound connecting pipe through the wall conduct
from outside. Be careful of the pipe allocation to do on
damage to the tubing.
Connect the pipes. Refer to "How to Connect the pipes" for
details.
Expel the air with a vacuum pump. Refer to "How to expel the
air with a vacuum pump" for details.
open the stop values of the outdoor unit to make the
refrigerant pipe connecting the indoor unit with the outdoor
unit in fluent flow.
Check the leakage. Check all the joints with the leak detector
or soap water.
Cover the joints of the connecting pipe with the soundproof /
insulating sheath (fittings), and bind it well with the tapes to
prevent leakage.
Execute heat insulation work completely on both sides of
the gas piping and the liquid piping. Otherwise, this can
sometimes result in water leakage.
1
2
3
5
6
7
4
Be sure to with insulating materials cover all the exposed
parts of the flare pipe joints and refrigerant pipe on the
liquid-side and the gas-side. Ensure that there is no gap
between them.
Incomplete insulation may cause water condensation.
Flaring
1
Cut a pipe with a pipe cutter. (refer to Fig.8-1)
Ta b le 8-2
(mm)
Ø6.4
14.217.2 N m
(144176 kgf cm)
8.3 8.3
Ø9.5
32.739.9 N m
(333407 kgf cm)
12.0 12.4
Ø12.7
49.560.3 N m
(504616 kgf cm)
15.4 15.8
Ø15.9
Ø19.1
61.875.4 N m
(630770 kgf cm)
97.2118.6 N m
(9901210 kgf cm)
18.6 19.0
22.9 23.3
R0.4~0.8
90
°
±
4
A
Insert a flare nut into a pipe and flare the pipe.
Refer to Table 8-2 for the dimension of flare nut spaces.
Fig.8-1
min max
Pipe gauge
Tightening torque
Flare dimensin A
Flare shape
90
Lean crude burr
14
installation manual
15


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