Installation manual
Please read ‘Safety Precautions’ described in the installation manual of the
air conditioner.
• Check and make sure that all parts are included in the package.
• For piping material and size of the refrigerant pipes, refer to the
installation manual of the air conditioner.
DB98-34641A(3)
Branch joints
Parts
Model name
Type
MXJ-2D2509K MXJ-3D2509K MXJ-4D2509K
Liquid side
Gas side
x 3 pieces
1
x 4 pieces
1
x 1 piece
2
x 2 pieces
3
x 2 pieces
4
x 1 piece
2
x 3 pieces
3
x 1 piece
4
x 1 piece
2
x 4 pieces
3
x 3 pieces
1
1 2 3 4
Socket
◆ Condensation may occur on the surface of the insulator depending on the
atmosphere in internal part of the ceiling.
◆ If the internal part of the ceiling has high temperature or humidity rate is more
than 80%, please add proper insulation to prevent water drops.
◆ Weldment must be applied to the stopper part of the pipes and sockets.
EX)
Note
Liquid side branch joint
Connecting method
<How to use socket>
- Connect the pipe to the connecting part of the branch joint or use
provided socket by cutting them according to the diameter of the
connecting pipe.
- When you cut the socket, make sure that the pipe connection part
is over 10 ~15mm.
- After cutting the socket, remove the burr on cut part of the socket.
It is impossible to connect a socket to a pipe when burr removing
process was poor or pipe is deformed.
10 ~15mm
or more
※ Basic specification
<Insertion depth of the connecting pipe>
500mm or more
Main pipe
Connected to outdoor unit
Connected pipe
Before branching
After branching
Connected pipe
Socket
Connected to indoor unit
Socket
Liquid side branch
※ Connect 3 MXJ-2D2509K
branch joints
Keep minimum distance of 500mm or more before
connecting a branch joint.
CAUTION
Do not insert the pipe deeply into the joint.
(Do not insert more than 70mm.)
CAUTION
Connecting pipe
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Gas side branch joint
1. Select a socket that fits the diameter of the pipe.
Socket
Retail purchases
Indoor unit side
Outdoor unit side
2. If the number of indoor unit is less than the number of the connection port, block the unused ports.
Blocking the unused
connection port
In order
Supplied
※ Use the socket by cutting it according to the connection ports.
10~15mm or more
3. Install the gas side branch joint horizontally.
±15° or
less
Horizontal line
±10° or
less
Horizontal line
Horizontal line
Insulation method
◆ After insulation is done, fix the header branch with a hanger.
Adhesive insulation tape
Insulating a pipe
Insulate the
header branch
Insulate after brazing the cap
Adhesive insulation tape
Insulator
Insulating gas side branch joint
◆ Fix the header branch with a cable tie and cover the top and bottom part of the connection part.
◆ Insulate the header branch and the brazed part and cover the connection part with a adhesive insulation tape.
Insulating liquid side branch joint
◆
Make sure to attach the part where provided insulator and the purchased insulator meets so that there is no space between them. Apply extra insulator(retail purchase), with at
least 10mm in thickness, to the part where two insulators are attached.
◆ Use an insulator with heat resisting temperature over 120℃. Insulate the branch joints with the minimum thickness of 10mm and insulation can be done as shown in
the figure on the bottom right side.
◆ When the installation was done in high humidity (Higher than 30℃, 80%) place, wrap the supplied insulator with extra insulator made of polyethylene foam or other
similar material with at least 10mm of thickness.
Fix securely without any gap
Provided insulator
Fix securely without
any gap
Pipe insulator
(Retail purchase)
Pipe insulator
(Retail purchase)
Thickness of the insulator(retail
purchase) must be over 10mm
Insulation tape
(Retail purchase)
Pipe and pipe insulator
(retail purchase)
※ After insulating the pipes, attach insulation tape as shown in the figure.
Socket
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