Refrigerant Piping Installation - LG Multi V Water IV ARWN080LAS4 Manual De Instalación

REFRIGERANT PIPING INSTALLATION

WARNING
!
Always use extreme care to prevent the refrigerant gas (R410A)
from leakage while using fire or flame. If the refrigerant gas
comes in contact with the flame from any source, such as a gas
stove, it breaks down and generates a poisonous gas which can
cause gas poisoning. Never perform brazing in an unventilated
room. Always conduct an inspection for gas leakage after installa-
tion of the refrigerant piping has been completed.
Cautions in pipe connection/valve operation
Open status when both the pipe and the valve are
in a straight line.
Cut both the pipe and the valve with a cutter to
suit the length
(Don't cut the length of less than 70mm)
CLOSE OPEN
! WARNING
After completing work, securely tighten both service ports and
caps so that gas does not leak.
Ball Valve
Elbow
(Liquid Pipe)
① Pipe joint (auxiliary parts): Securely perform brazing with a nitrogen
blow into the service valve port.(Releasing pressure : 0.02 MPa or
less)
② Cap: Remove caps and operate valve, etc. After operation, always
reattach caps (tightening torque of valve cap: 25Nm (250kg-cm) or
more). (Don't remove the internal part of the port)
③ Service port: Make the refrigerant pipe vacuum and charge it using
the service port. Always reattach caps after completing work (tight-
ening torque of service cap: 14Nm (140kg-cm) or more).
④ Liquid pipe
⑤ Gas pipe
⑥ Elbow joint (field supply)
❈ Remove the front panel before pipe
connection
❈ Must check the pipe (liquid pipe, gas
pipe) before pipe connection
Liquid pipe
Ball Valve(Gas Pipe)
Liquid pipe
Liquid pipe
Gas pipe
Gas pipe
Connection of Outside units
Outside units Model
A B
(Master) (Slave1)
ARCNN21
A
2 Unit
A B C
(Master) (Slave1) (Slave2)
3 Unit
ARCNN31
A B C D
(Master) (Slave1) (Slave2) (Slave3)
4 Unit
ARCNN41
C
C
* Install the branch pipe between outside units so that the outlet pipe
is parallel to the surface.
Viewed from point A
in direction of arrow
! CAUTION
When installing the branch pipe vertically between the outside
units, the refrigerant can be uneven between the outside units,
leading to compressor burn and reduced capacity.
CAUTION
1
Use the following materials for refrigerant piping.
• Material: Seamless phosphorous deoxidized copper pipe
• Wall thickness : Comply with the relevant local and national regu-
lations for the designed pressure 3.8MPa. We
recommend the following table as the minimum
wall thickness.
Outer diameter
6.35 9.52 12.7 15.88 19.05 22.2 25.4 28.58 31.8 34.9 38.1 41.3 44.45 53.98
[mm]
Minimum
0.8 0.8 0.8 0.99 0.99 0.99 0.99 0.99 1.1 1.21 1.35 1.43 1.55 2.1
thickness [mm]
2
Commercially available piping often contains dust and other materi-
als. Always blow it clean with a dry inert gas.
3
Use care to prevent dust, water or other contaminants from enter-
ing the piping during installation.
Gas pipe
4
Reduce the number of bending portions as much as possible, and
make bending radius as big as possible.
5
Always use the branch piping set shown below, which are sold sep-
arately.
Y branch
ARBLB01621, ARBLB03321,
ARBLB07121, ARBLB14521,
ARBLB23220
6
If the diameters of the branch piping of the designated refrigerant
piping differs, use a pipe cutter to cut the connecting section and
then use an adapter for connecting different diameters to connect
the piping.
7
Always observe the restrictions on the refrigerant piping (such as
rated length, difference in height, and piping diameter).
Failure to do so can result in equipment failure or a decline in heat-
ing/cooling performance.
Gas Pipe Liquid Pipe
416 331
408 314
I.D.28.58 I.D.28.58 I.D.15.88
111 I.D.12.7
I.D.22.2 I.D.19.05
I.D.31.8 I.D.34.9
I.D.41.3 I.D.38.1 O.D.34.9 I.D.22.2 O.D.19.05
I.D.28.58
130 70
341
334
298
281
I.D.41.3 I.D.34.9 111
I.D.22.2 I.D.19.05
I.D.41.3 O.D.34.9
I.D.28.58
125
415
334
375 281
134 I.D.22.2 I.D.19.05
I.D.41.3
I.D.44.48 I.D.53.98
I.D.25.4 O.D.22.2
I.D.28.58
80
Execute the
welding while
Within +/- 10°
pouring
nitrogen
Do not cut for
70mm or less
Header
4 branch 7 branch 10 branch
ARBL054 ARBL057 ARBL1010
ARBL104 ARBL107 ARBL2010
11
I.D.15.88
I.D.9.52 83
I.D.12.7 I.D.15.88
I.D.19.05 83
I.D.15.88 I.D.12.7
I.D.19.05 83
I.D.15.88 I.D.12.7