Toshiba MMY-MAP0806HT8P-E Installation Manual page 61

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 flows directly into
the header unit.)
Liquid piping
q Figure 1
GOOD
Header unit Follower unit Follower unit
A B C
Main pipe
To the indoor unit
Gas piping
q Figure 3
GOOD
Header unit Follower unit Follower unit
A B C
Main pipe
To the indoor unit
Extension valve
• 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.
(Horizontal line)
Within ±15 degrees
A
(A arrow view)
B
119-EN
1117101201-3 EN.indd 60 1117101201-3 EN.indd 60
q Figure 2
NO GOOD
Header unit Follower unit Follower unit
A B C
NO GOOD
Main pipe
To the indoor unit
[Inverse connection of a gas-side branch unit]
q Figure 4
NO GOOD
Header unit Follower unit Follower unit
A B C
Main pipe
To the indoor unit
To gas-side branch unit
(Horizontal line)
Do not connect
Within ±15
a branch unit
degrees
vertically.
(B arrow view)
At a level position
When drawing pipes downward
q Figure 5
GOOD
Header unit Follower unit Follower unit
A B C
L-shaped
pipe
To gas-side branch
To gas-side branch
unit
unit
• 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 figure above.).
Specify the pipe diameter in advance to allow for adding another unit.
– 60 –
[Vertical connection of branch units]
q Figure 6
NO GOOD
To gas-side To gas-side
branch unit branch unit
8/8/2559 BE 3:49 PM 8/8/2559 BE 3:49 PM
120-EN