Install The Connecting Pipe - INVENTOR V2MC I-24 Installation Manual

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:
Table 8-1
The type of models
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
R410A inverter Split type air
conditioner and Centrifugal
fan outdoor unit
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
CAUTION
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.
Execute heat insulation work completely on both sides of
the gas piping and the liquid piping. Otherwise, this can
sometimes result in water leakage.
installation manual
14
The length of
The max
Model height drop
refrigerant pipe
15
8
12K
30 10
18K-24K
20
50
30K-42K
50
48K-60K
25
15 8
12K
30 10
18K-24K
30 20
30K-60K
25
<15K 10
20
30
>15K~<24K
50 25
>24K~<36K
30
>36K~<60K 65
15
12K 8
25
15
18K-30K
30 20
36K
50
48K-60K
25
25
10
18K-24K
30 15
30K
30
20
36K
50
25
42K-60K
25 15
18K-24K
30K 30 20
30
36K
25
42K 50 30
48K-60K 50 35
5 5
12K-18K
8.1 The Procedure of Connecting Pipes
1 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
2
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
3
details.
Expel the air with a vacuum pump. Refer to "How to expel the
4
air with a vacuum pump" for details.
open the stop values of the outdoor unit to make the
5
refrigerant pipe connecting the indoor unit with the outdoor
unit in fluent flow.
6 Check the leakage. Check all the joints with the leak detector
or soap water.
Cover the joints of the connecting pipe with the soundproof /
7
insulating sheath (fittings), and bind it well with the tapes to
prevent leakage.
CAUTION
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.
How to connect the pipes
Flaring
1
Cut a pipe with a pipe cutter. (refer to Fig.8-1)
90
Insert a flare nut into a pipe and flare the pipe.
Refer to Table 8-2 for the dimension of flare nut spaces.
T a b le 8-2
Tightening torque
Pipe gauge
14.2～17.2 N m
Ø6.4
(144～176 kgf cm)
32.7～39.9 N m
Ø9.5
(333～407 kgf cm)
49.5～60.3 N m
Ø12.7
(504～616 kgf cm)
61.8～75.4 N m
Ø15.9
(630～770 kgf cm)
97.2～118.6 N m
Ø19.1
(990～1210 kgf cm)
Lean crude burr
Fig.8-1
Flare dimensin A
Flare shape
min (mm) max
8.3 8.3
90 ° ± 4
12.0 12.4
A
15.4 15.8
18.6 19.0
22.9 23.3
R0.4~0.8