EAS Electric EVRO-400RDC, Инструкция по установке и эксплуатации, Страница: 33 / 64

7
5. INSTALL THE CONNECTING PIPE
Fig.5-1
Fig.5-2
Fig.5-3
Fig.5-4
CAUTION
CAUTION
90
R0.4~0.8
45 °±
2
90°
± 4
A
φ6.4
φ9.5
φ12.7
φ15.9
φ19.1
(mm)
A(mm)
8.7
12.4
15.8
19.0
23.3
8.3
12.0
15.4
18.6
22.9
Table 5-1
Table 5-2
Table 5-3
φ22.2 27.3 27.0
5.1 Refrigerant pipes
Lean
Rough
Burr
OD
Max.
Min.
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)
Tightening torque
N.m
φ6.4
φ9.5
φ12.7
φ15.9
φ19.1
97.2~118.6 N.m
(990 ~ 1210 kgf.cm)
(630~770 kgf.cm)
61.8~75.4 N.m
49.5~60.3 N.m
(504~616 kgf.cm)
(333~407 kgf.cm)
14.2~17.2 N.m
(144~176 kgf.cm)
32.7~39.9 N.m
φ22.2
109.5~133.7 N.m
(1115 ~ 1364 kgf.cm)
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
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.
5.2 Pipe types
Refrigerant settings
Outdoor unit
Outdoor unit
The first manifold
a
b
c
e
f
d
L
1
L
2
L
3
L
4
L
5
A
B
C
D
E
N
1
N
3
N
5
N
6
N
2
N
4
Indoor unit
A
B
D
E
C
a
b
c
e
f
d
L
1
L
2
L
5
L
3
L
4
Connecting method 1
Connecting method 2
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.
Code
L2~L5
L1
a,b,c,d,e,f
A,B,C,D,E
Names
Main pipe
The main pipes of
indoor unit
The branch pipes
of indoor unit
Indoor unit branch
pipes components
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.
Connection components among main
indoor pipe, main pipe,and branch pipe.
The pipe after the branch connect with
the indoor unit.
V.2