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1
English
2
Connection Method
<Gas joint>
Determine the installation orientation of the L-pipe according to the piping connections from the outdoor unit, and select a socket that matches
the diameter of the locally procured pipes.
Socket (Provided)
To outdoor unit
Locally procured piping
L-pipe (Provided)
Socket (Provided)
Brazed locally
Outlet (2)
Locally procured piping
Locally procured piping
To main pipe or to
To outdoor unit or to
other joint
Outlet (1)
other joint
Inlet
Socket (Provided)
Gas joint (Provided)
<Liquid joint>
Select a socket to match the diameter of the locally procured piping and install it.
Locally procured piping
To outdoor unit
Socket (Provided)
To outdoor unit or
to other joint
Locally procured piping
To main pipe or to
Socket (Provided)
liquid joint
Liquid joint (Provided)
Socket (Provided)
Locally procured piping
<Balance pipe joint>
To outdoor unit
Locally procured piping
To outdoor unit
or to other joint
To outdoor unit or
Locally procured piping
to other joint
Balance pipe joint (provided)
Locally procured piping
For 2 outdoor units system, connect directly between the header unit and the follower unit.
3
Example of pipe connections
Install and connect the piping between the outdoor units as shown in the diagram below.
NOTE
There are no specific requirements on the length of the straight pipe before the joint for either the gas or liquid sides.
<For connections to the front>
Header unit A
Follower unit B
Balance
pipe joint
Balance pipe
Liquid pipe
Liquid joint
To indoor units
Gas pipe
L-pipe
Gas joint
NOTE
• Select the socket (No.in
) fitting to the pipe diameter
connected to the outdoor unit.
• After cutting the pipe, be sure to remove the burrs and
polish the end surface. When some squash or
deformation, etc. occurs, improve the pipe insertion
condition by using the flare tool.
• Confirm whether no dust, water, foreign matters, etc
exists on the gas joint, the liquid joint, the balance pipe
joint and the socket to be inserted.
Follower unit C
A view
Gas joint
Horizontal line
Outdoor unit
Locally procured
connection piping kit
piping
A
<For connections to the bottom>
Remove the knock-out hole from the bottom of the outdoor units.
(Refer to the installation manual of the outdoor unit.)
Follower unit B
Header unit A
Balance
pipe
joint
To indoor units
Balance
pipe
Liquid pipe
Liquid joint
Gas pipe
L-pipe
Gas joint
4
Heat insulating for pipes
• Insulate the joints of the liquid pipe, gas pipe, and balance pipe individually.
• Insulator for the liquid joint and the balance pipe joint are not provided. Please procure it locally.
<Gas pipe>
• Use heat insulators with heat resistance of 248 °F or more for the gas pipe.
• In order to prevent dripping condensation, do not leave any gap between heat insulator for branching joint (included in package) and heat
insulator for pipe (locally procured). And then, wrap the seam with heat insulator with thickness of 0.4" or more (locally procured).
How to apply the insulation to the gas joint
Heat insulator
Locally procured
(Provided)
piping insulator
No gap
No gap
(with thickness of
0.4" or more)
Locally procured
6"
piping heat insulator
Joint
(with thickness of 0.4"
Taping (Locally procured)
or more)
<Liquid /balance pipe>
• To heat insulate the T-joints, use a commercially available joint cover (for T-shape) that is with 0.4" or more thickness, or one applied with
machining as shown in the figure.
• Seal the T-joints completely without any gap to prevent condensation and dripping water.
Insulated pipe
90°
Seal the seams with
Seal with vinyl tape
urethane foam
Insulated pipe
ØD
Heat insulator
Cut at 90°
Diameter of
insulated pipe joint
90° cutout
Follower unit C
A view
Gas
joint
Locally procured
Horizontal line
piping
A
Heat insulator
(Locally procured)
Taping (Locally procured)
Heat insulator
Heat insulator
(Provided)
(Locally procured)
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