Kaysun KMF-400 DN3, Installation Manual

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The first connecting methond
Outdoor unit
Pipe length(From the nearest branch pipe equivalent length)
a
L1
A
Maximum pipe equivalent length
The first manifold
(From the first line branch pipe) Maximum pipe equivalent length
L2
L3 L4 L5
d
C
c
D
E
B
b
e f
Indoor Unit
Fig.5-6
The second connecting methond
Outdoor unit
Pipe length(From the nearest manifold
equivalent length)
N1
a
N2
Indoor unit farthest pipe equivalent
length
B
b
L1
L2
L3
(From the first manifold)
Maximum pipe equivalent length
A
c
N3
L4
D
E
N4
The First manifold
C
d
L5
f
e
N5
N6
Indoor unit
Fig.5-7
5.6 Remove Dirt or Water in the Pipe
1. Make sure there is no any dirt or water before connecting the
pipe to the outdoor units.
Liquid side stop valve
Gas side stop valve
2. Wash the pipe with high pressure nitrogen, never use
refrigerant of outdoor unit.
5.7 Airtight Test
1. Connect the high pressure side pipe and liquid side stop valve
after connecting indoor unit pipes.
Nitrogen
Nitrogen
Liquid pipe
Gas pipe
Meter connector components
used for pressure bulge test
Indoor unit
2. Weld low pressure side pipe and meter connector.
3. Use vacuum pump to discharge air from valve core of liquid
side stop valve and meter connector until the pressure reaches
to -1kgf/cm
2
. Fig.5-8
4. Close the vacuum pump and fill nitrogen40kgf/cm
2
.
5. At the end of air tightness test, the gas side stop valve and
the low pressure side piping should be welded.
installation manual
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