120-EN
119-EN
– 60 –
5. Be careful of the connecting arrangement of the header unit and follower units. Set the outdoor units in order of
capacity from the one with the largest capacity. (A (Header unit)
≥
B
≥
C)
• Be sure to use a header unit for the leading outdoor unit to be connected to the main pipe. (Figure 1 and 3)
• Be sure to use a T-shaped branch joint (RBM-BT14E/RBM-BT24E: separately purchased) to connect each
outdoor unit.
• Be careful of the direction of the Outdoor unit connection piping kit for the liquid side. (As shown in Figure 2, a
Outdoor unit connection piping kit cannot be attached so that the refrigerant of the main pipe
fl
ows directly into
the header unit.)
Liquid piping
Header unit
A
Header unit
A
Follower unit
B
Follower unit
B
Follower unit
C
Follower unit
C
Main pipe
Main pipe
To the indoor unit
To the indoor unit
NO GOOD
q
Figure 1
q
Figure 2
GOOD
NO GOOD
Gas piping
Header unit
A
Header unit
A
Follower unit
B
Follower unit
B
Follower unit
C
Follower unit
C
Main pipe
Main pipe
To the indoor unit
To the indoor unit
Extension valve
To gas-side branch unit
q
Figure 3
q
Figure 4
[Inverse connection of a gas-side branch unit]
GOOD
NO GOOD
• When attaching a Y-shaped branch unit for the gas side, attach it level with the ground (Be sure not to exceed
±15 degrees.). Regarding a T-shape branch joints for the liquid side, there is no restriction for its angle.
A
B
(Horizontal line)
(Horizontal line)
(A arrow view)
(B arrow view)
Within ±15
degrees
Within ±15 degrees
Do not connect
a branch unit
vertically.
At a level position
When drawing pipes downward
L-shaped
pipe
To gas-side branch
unit
To gas-side
branch unit
To gas-side branch
unit
Header unit
A
Follower unit
B
Follower unit
C
To gas-side
branch unit
q
Figure 5
q
Figure 6
[Vertical connection of branch units]
GOOD
NO GOOD
• Adding only one follower unit is possible. Install the additional unit so that its position is opposite to the header
unit. Use an extension valve for installation (See the
fi
gure above.).
Specify the pipe diameter in advance to allow for adding another unit.
1117101201-3 EN.indd 60
1117101201-3 EN.indd 60
8/8/2559 BE 3:49 PM
8/8/2559 BE 3:49 PM
