Toshiba MMY-MAP0806HT8P-ME Installation Manual page 15

No. Piping parts Name
Connecting pipe size of indoor unit
Branching section
Indoor unit
007 to 012 type
(5)

connecting pipe
Indoor unit
015 to 018 type
024 to 056 type
072 to 096 type
Selection of branching section (Y-shaped branching joint)
Y-shaped
(6)
Branching section
branching joint
Y-shape
branching joint
Selection of branching section (Branching header)
*2
Branching header
(7)
Branching section Branching header
*2: Up to a total of 6.0 maximum equivalent to HP capacity codes is connectable to one line
after branching of header. When the total capacity codes of all outdoor units are 12 to below
26 (equivalent to HP) and you use a branching header for the first branching section, use
a RBM-HY2043E or RBM-HY2083E regardless of the total capacity codes of outdoor units
at downstream side. In addition, you cannot use a branching header for the first branching
section when the total capacity codes of all outdoor units are over 26 (equivalent to HP).
Outdoor unit connection piping kit (For linking of outdoor units)
Outdoor unit
connection piping
(8)
Branching section
Outdoor unit
kit (For linking of
connection piping
outdoor units)
kit (For linking of
outdoor units)
*3: Downstream side when regarding the main piping as the start point
27-EN
1117101401-3_EN.indd 14 1117101401-3_EN.indd 14
Selection of pipe size Remarks
Liquid
Capacity rank Gas side
side
15m or less real length Ø9.5 Ø6.4
Real length exceeds 15m Ø12.7 Ø6.4
Ø12.7 Ø6.4
Ø15.9 Ø9.5
Ø22.2 Ø12.7
Total capacity code of indoor units
Model name
Equivalent to
Equivalent to HP
capacity
Below 6.4 Below 18.0 RBM-BY55E
6.4 to below 14.2 18.0 to below 40.0 RBM-BY105E
14.2 to below 25.2 40.0 to below 70.5 RBM-BY205E
25.2 or more 70.5 or more RBM-BY305E
Total capacity code of indoor units
Model name
Equivalent to
Equivalent to HP
capacity
Below 14.2 Below 40.0 RBM-HY1043E
For 4
branches
14.2 to below 25.2 40.0 to below 70.5 RBM-HY2043E
Below 14.2 Below 40.0 RBM-HY1083E
For 8
branches
14.2 to below 25.2 40.0 to below 70.5 RBM-HY2083E
Total capacity code of outdoor units *3
Model name
Equivalent to
Equivalent to HP
capacity
Below 26.0 Below 73.0 RBM-BT14E
26.0 or more Above 73.0 RBM-BT24E
■ Allowable length of refrigerant pipes and allowable height
difference between units
Outdoor unit
A B
Height
Header Follower
difference
unit unit
between
outdoor
units
H3 ≤ 5 m
La Lb
LA
Outdoor unit connection piping kit
(For linking of outdoor units)
The longest piping between outdoor units:
LO ≤ 25 m
Height
difference
between
outdoor
and indoor
units:
H1 ≤ 70 m
Indoor unit connecting
pipe
First branching
section
L3
The longest piping length from the fi rst branch: Li ≤ 90 m
Y-shaped
branching joint
f
◆ System restriction
Outdoor unit combination
Total capacity of outdoor units
Indoor unit connection
Total capacity of indoor units
(varies depending on the height difference between
indoor units.)
◆ Cautions for installation
• Set the outdoor unit fi rst connected to the bridging pipe to the indoor units as the header unit.
• Install the outdoor units in order of their capacity codes: A (header unit) ≥ B ≥ C
• When connecting gas pipes to indoor units, use Y-shaped branching joints to keep pipes level.
• When piping to outdoor units using Outdoor unit connection piping kits, intersect the pipes to the outdoor unit
and those to indoor units at a right angle as shown in fi gure 1 on "6. Installation of the outdoor unit". Do not
connect them as in fi gure 2 on "6. Installation of the outdoor unit".
– 14 –
C
Follower unit
Lc
Branching header
Y-shaped branching
L7 joint
Indoor unit
a b c d e
The longest piping length: L ≤ 235 m
L6
L5
L4
h i
j
g
Indoor unit
(j)
Up to 3 units
Up to 60 HP
Up to 64 units
H2 ≤ 15m 135% of outdoor units' capacity
15m < H2 105% of outdoor units' capacity
Height
difference
between
indoor
units:
H2 ≤ 40 m
28-EN
1/12/16 3:18 PM 1/12/16 3:18 PM