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.
<Liquid joint>
Select a socket to match the diameter of the locally procured piping and install it.
<Balance pipe joint>
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>
To outdoor unit
Locally procured piping
Locally procured piping
To main pipe or to
other joint
Inlet
Outlet (2)
Outlet (1)
Socket (Provided)
Socket (Provided)
L-pipe (Provided)
Locally procured piping
To outdoor unit or to
other joint
Gas joint (Provided)
Socket (Provided)
Brazed locally
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.
Locally procured piping
Socket (Provided)
To main pipe or to
liquid joint
Socket (Provided)
Liquid joint (Provided)
To outdoor unit
To outdoor unit or
to other joint
Locally procured piping
Socket (Provided)
Locally procured piping
Balance pipe joint (provided)
Locally procured piping
To outdoor unit or
to other joint
To outdoor unit
or to other joint
Locally procured piping
To outdoor unit
Locally procured piping
A
Outdoor unit
connection piping kit
L-pipe
Balance pipe
Gas pipe
Locally procured
piping
Header unit A
Liquid pipe
Follower unit B
Follower unit C
To indoor units
Balance
pipe joint
Liquid joint
Gas joint
A view
Horizontal line
Gas joint
<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.)
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
<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.
A
Locally procured
piping
Gas joint
Balance
pipe
L-pipe
20"
or mor
e
Header unit A
Liquid pipe
Follower unit B
Follower unit C
To indoor units
Gas pipe
Liquid joint
Balance
pipe
joint
A view
Horizontal line
Gas
joint
Heat insulator
(Locally procured)
Heat insulator
(Provided)
Joint
No gap
Taping (Locally procured)
Taping (Locally procured)
Heat insulator
(Locally procured)
Heat insulator
(Provided)
Locally procured
piping heat insulator
(with thickness of 0.4"
or more)
No gap
Locally procured
piping insulator
(with thickness of
0.4" or more)
6"
Seal with vinyl tape
90° cutout
Insulated pipe
90°
Seal the seams with
urethane foam
Insulated pipe
Heat insulator
Diameter of
insulated pipe joint
Cut at 90°
4"
or
mo
re
ØD
ØD
