Installation manual
15
F
7)
The main pipe L8 with N8
7
N10 downstream indoor units that
total capacity is 112+56×2=224 the pipe L8 diameter isΦ19.1/Φ
9.5, thus select
KCMI 100B-200B
for the branching pipe H.
8)
The main pipe L5 with N5
7
N10 downstream indoor units that
total capacity is 112+56×3+71×2=366, the pipe L5 diameter is
Φ28.6/Φ12.7, thus select
KCMI 200B-300B
for the branching
pipe E.
9)
The main pipe A with N1
7
N10 downstream indoor units that
total capacity is 56×3+71×6+112
+
706, thus select
KCMI
200B-400B
for the branching pipe A.
C Main pipe (Refer to Table 6-4, Table 6-5, Table 6-6): Main pipe
6.9 Gas tight test
1)
Upon set up the indoor unit pipeline, please connect the
Hi-pressure pipe with shut-off valve firstly.
2)
Weld the pipe at the low-pressure side to the meter
connector.
3)
Use the vacuum pump discharging air inside the liquid side
shut-off valve and meter connecter, until to the -0.1MPa.
4)
Close the vacuum pump, charge 3.9MPa nitrogen gas from
the piston of shut-off valve and from the meter connector.
Pressure inside should be maintained at there no less than
24 hrs.
Installation
Gas pipe
Indoor unit
D Parallel connect the main units
1) The main unit linked by Pipe g1 is 8HP, parallel connects with
main unit. the connective pipe diameter to be selected accord-
ing to its connector size isΦ25.4/Φ12.7,
The main unit linked by Pipe g2 is 8HP, parallel connects with
main unit. the connective pipe diameter to be selected accord-
ing to its connector size isΦ25.4/Φ12.7,
The main unit linked by Pipe g3 is 10HP, parallel connects with
main unit. the connective pipe diameter to be selected accord-
ing to its connector size isΦ25.4/Φ12.7.
plate of valve
Liquid pipe
Nitrogen
Nitrogen
Gas side of
shut-off valve
Liquid side of
shut-off valve
Fig.6-5
2) The upstream of G1 is the two-parallel connected main units,
refer to Table 6-9 select the three-parallel connected main unit,
the pipe diameter isΦ41.3/Φ19.1.
3) Parallel connect the three main units, refer to Table 6-7 should
select KCME13 for main unit connective pipes (L+M).
6.8 Remove dirt or water in the piping
Make sure there is no any dirt or water before connecting the
piping to the main units.
Wash the piping with high pressure nitrogen, never use
refrigerant of the main unit.
CAUTION
●
Pressurized nitrogen 3.9MPa is used for airtightness
test.
●
It is not allowed to use oxygen, combustible gas or toxic
gas to conduct the airtightness test.
●
When welding, please use wet cloth insulating the low-
pressure valve for protection.
●
For avoid the equipment be damaged, the pressure
maintained time should not last too long.
G1
L
2
M
L
A
N
1
(71)
a
b
C
L
3
B
D
L
4
c
d
N
3
(71)
N
2
(71)
N
4
(71)
g1
g2
g3
L
1
L
5
L
6
N
5
(71)
e
f
N
6
(71)
W3
W2
W1
E
L
7
G
L
8
g
L
9
H
I
N
7
(56)
(8)
(8)
(10)
h
N
8
(112)
i
j
N
9
(56)
N
10
(56)
Fig.6-4
L1 in the Fig.6-2, which upstream main units’ total capacity is
10
+8+8
+
26HP,
based
on table 6-5,
the gas/liquid pipe
diameter
areΦ
41.3
/Φ22.2, total capacity of the downstream indoor
unit is
56×3+71×6+112=706 based on table 6-4, the
gas/liquid pipe
diameter areΦ
34.9
/Φ19.1, take the large one for
your
selection, final confirm the main pipe diameter is: gas/liquid
pipeΦ41.3/Φ22.2.
