Toshiba MMY-MAP0804FT8-E, Installation Manual

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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)
1) Be sure to use a header unit for the leading outdoor unit to be connected to the main pipe. (Figure 1, 3 and
5)
2) Be sure to use a T-shaped branch joint (RBM-BT14FE / RBM-BT24FE: separately purchased) to connect
each outdoor unit.
3) When attaching a Y-shaped branch unit for the outdoor unit connection piping kit, 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.
4) 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.)
Discharge gas / Liquid pipes
▼
Figure 1
▼
Figure 2
A
B
Within ±15 degrees
(Horizontal line)
Within ±15
degrees
(Horizontal line)
(A arrow view)
At a level position
(B arrow view)
Do not connect
a branch unit
vertically.
Header unit A Follower unit B Follower unit C
Main pipe
To indoor unit
Liquid joint
Discharge gas joint
Good
Header unit A Follower unit B Follower unit C
To indoor unit Main pipe
No
Good
Liquid joint
Discharge gas joint
Suction gas pipes
<Suction gas joint reverse orientation installation>
▼ Figure 3 ▼ Figure 4
<Suction gas joint upright orientation installation>
▼ Figure 5
When drawing pipes downward
<Vertical installation> <Vertical installation>
▼ Figure 5 ▼ Figure 6 ▼ Figure 7
Header unit A Follower unit B Follower unit C
Main pipe
Suction gas joint
To indoor unit
Good
Header unit A Follower unit B Follower unit C
Main pipe
Suction gas joint
To indoor unit
No
Good
Suction gas joint
Header unit A Follower unit B
Main pipe
Suction gas joint
To indoor unit
A view
Suction gas joint
A
No
Good
Unit
Vertical line
Header unit
A
Follower unit
B
Follower unit
C
L-shaped
pipe
To gas-side branch
unit
Suction gas joint
Good
Header unit A
Suction gas joint
No
Good
Header unit A
Suction gas joint
No
Good
17-EN 18-EN