Advertisement
Available languages
Available languages
5. INSTALL THE CONNECTING PIPE
5.1 Refrigerant pipes
1.Flare
1)Cut the pipe with a knife.(See Fig.5-1)
2)Fit the pipe to the flare of connecting nut(Table 5-1)
90
OD
Max.
(mm)
φ6.4
8.7
φ9.5
12.4
φ12.7
15.8
φ15.9
19.0
φ19.1
23.3
φ22.2
27.3
2.Fastening the nut
Align the connecting pipe and fastening the nut and then fasten it
with a wrech. (See Fig.5-2)
Pipe dimensions
φ6.4
φ9.5
φ12.7
φ15.9
φ19.1
φ22.2
CAUTION
When welding the refrigerant pipes, nitrogen flushing operation
should be applied otherwise the oxidation crumbs will block the
cooling system which will result in damage.
Large torque will distroy the flare, small torque will result in gas
leakage because of loose. Please refer to Table 5-2 for the
tightening torque.
Burr
Rough
Lean
Table 5-1
A(mm)
Min.
90 ° ± 4
8.3
A
12.0
R0.4~0.8
15.4
18.6
22.9
27.0
Fig.5-2
Table 5-2
Tightening torque
N.m
14.2~17.2 N.m
(144~176 kgf.cm)
32.7~39.9 N.m
(333~407 kgf.cm)
49.5~60.3 N.m
(504~616 kgf.cm)
61.8~75.4 N.m
(630~770 kgf.cm)
97.2~118.6 N.m
(990~1210 kgf.cm)
109.5~133.7 N.m
(1115~1364 kgf.cm)
5.2 Pipe types
Refrigerant settings
Names
Main pipe
The main pipes of
indoor unit
The branch pipes
of indoor unit
Indoor unit branch
pipes components
Fig.5-1
Connecting method 1
Outdoor unit
L
1
A
The first manifold
Connecting method 2
Outdoor unit
L
1
The first manifold
All the manifolds used should be specialized ones designated by our
company. Fail to follow the requirements could lead to system error.
If the distance between the first manifold and the last one exceeds
15m, please apply the 2nd connecting way.
Distance between the indoor unit and the nearest manifold should
less than 15m.
5.3 Diameters of indoor unit connecting pipe
1)Diameter reference table 4-4 of R410A indoor unit connecting pipe.
2)E.g. 1: The downstream connecting indoor unit capacity of L2 is
45×2＝90,the diameter of gas pipe and liquid pipe will be
Φ15.9/Φ9.5 after checking.
7
Piping position
Pipe between the outdoor unit and
indoor-side first manifold
The pipe after the first branch do not direct
connect with the indoor unit.
The pipe after the branch connect with
the indoor unit.
Connection components among main
indoor pipe, main pipe,and branch pipe.
L
4
L
D
3
L
C
2
B
c
b
a
a
L
2
B
A
b
L
3
L
4
D
C
L
5
E
CAUTION
Table 5-3
Code
L1
L2~L5
a,b,c,d,e,f
A,B,C,D,E
f
L
5
E
e
d
Fig.5-3
N
1
Indoor unit
N
2
N
3
c
N
4
d
e
f
N
N
5
6
Fig.5-4
V.2
Advertisement
