Table of Contents
Advertisement
REFRIGERANT PIPING
INSTALLATION
For Heat Pump System Installation
Precautions on Pipe connection / Valve operation
Pipe connection is done by connecting from the end of the pipe to the
branching pipes, and the refrigerant pipe coming out of the outdoor
unit is divided at the end to connect to each indoor unit. Flare
connection for the indoor unit, and welding connection for the outdoor
pipe and the branching parts.
- Use hexagonal wrench to open/close the valve.
h In case of the heat pump system installation, be sure to maintain to
close no use pipe like below picture.
h Refer to the accessory installation manual provided.
Liquid pipe
No Use
(Weld with supplied
accessory pipe cap)
Gas pipe
WARNING
!
• Always careful not to leak the refrigerant during welding.
• The refrigerant generates poisonous gas harmful to human body
if combusted.
• Do not perform welding in a closed space.
• Be sure to close the cap of the service port to prevent gas
leakage after the work.
CAUTION
!
Please block the pipe knock outs of the front and side panels after
installing the pipes.
(Animals or foreign objects may be brought in to damage wires.)
Service Port
Caution
1
Use the following materials for refrigerant piping.
- Material: Seamless phosphorous deoxidized copper pipe
- Wall thickness : Comply with the relevant local and national
regulations for the designed pressure 3.8 MPa
(551 psi). We recommend the following table as
the minimum wall thickness.
Outer diameter
6.35
9.52
[mm(inch)]
(1/4)
(3/8)
Minimum thickness
0.8
0.8
[mm(inch)]
(0.03)
(0.03)
Outer diameter
28.58
31.8
[mm(inch)]
(1-1/8)
(1-1/4)
Minimum thickness
0.99
1.1
[mm(inch)]
(0.04)
(0.04)
2
Commercially available piping often contains dust and other
materials. Always blow it clean with a dry inert gas.
3
Use care to prevent dust, water or other contaminants from entering
the piping during installation.
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
separately.
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
heating/cooling performance.
8
A second branch cannot be made after a header.
(These are shown by
.)
A
To Outdoor Unit
A
B
Sealed Piping
A
12.7
15.88
19.05
22.2
(1/2)
(5/8)
(3/4)
(7/8)
0.8
0.99
0.99
0.99
(0.03)
(0.04)
(0.04)
(0.04)
34.9
38.1
41.3
44.45
(1-3/8)
(1-1/2)
(1-5/8)
(1-3/4)
1.21
1.35
1.43
1.55
(0.05)
(0.05)
(0.06)
(0.06)
Header
4 branches 7 branches 10 branches
ARBL054
ARBL057
ARBL1010
ARBL104
ARBL107
ARBL2010
B
19
25.4
(1)
0.99
(0.04)
53.98
(2-1/8)
2.1
(0.08)
Advertisement
Chapters
Table of Contents
