Toshiba Carrier MMY-MAP0726FT9P-UL Manuel D'installation page 14

◆ System restrictions
Max. No. of combined outdoor units
Max. capacity of combined outdoor units
Max. No. of combined indoor units
Max. capacity of combined indoor units
(*1) : In case without central control. It is up to 54 units in case with central control.
(*2) : If the system configure only the limited indoor unit type and limited number of connection indoor unit, total indoor capacity code up to 150%
of the outdoor capacity code is available when the height difference between the indoor units is 49 ft (15m) or less. When total indoor
capacity code exceeds 135% of outdoor unit capacity code, turn on SW09/Bit2 on I/F P.C. board of outdoor header unit.
* Permanent operation and heating operation below 80 % is not recommended.
For more information, please refer to the engineering data book.
◆ Cautions for installation
• Set the outdoor unit fi rst connected to the branching pipe to the indoor units as the header unit.
• Install the outdoor units in order of their capacity codes : (A) header unit ≥ (B) ≥ (C)
• Y-shaped branching joint must be installed horizontally.
• 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".
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1122001101-2_EN_FR.indb 13 1122001101-2_EN_FR.indb 13
3 units
38 ton
64 units (*1)
135% of outdoor units' capacity
H2 ≤ 49 ft (15m)
150% of outdoor units' capacity (*2)
H2 > 49 ft (15m) 105% of outdoor units' capacity
– 13 –
◆ Allowable length and allowable height difference of refrigerant piping
Item
Total extension of pipe
(liquid pipe, real length)
Farthest piping length L
H2 > 9.8 ft
Max. length of
Main piping
H2 ≤ 9.8 ft
Pipe
length
Farthest equivalent piping length from the
first branch Li
Farthest equivalent piping length between outdoor units LO
Maximum equivalent piping length of pipes connected to outdoor
units
Maximum real length of terminal branching section to indoor units
Maximum real length of between
Flow Selector unit and indoor unit
Maximum equivalent length between branching section
Upper outdoor units
Height between outdoor and
indoor units H1
Lower outdoor units
Upper outdoor units
Height between indoor
units H2
Lower outdoor units (*6)
Height
difference
Height between outdoor units H3 (*8)
Single port type H4
Height difference between
Single port type
indoor units in one Flow
(Long piping model) H6
Selector unit
Multi port type H5
(*1) : Total refrigerant amount in the system is restricted according to capacity type. Refer to the table below.
(*2) : The total piping length in one FS unit in case of branching to 4 : 394 ft (p + q + r + L11 + s + t), in case of branching to 6 : 590 ft.
(*3) : Total length of pipe should be less than 164 ft (L11 + s + t, L13 + u + v) per branch.
(*4) : If the height difference (H2) between indoor units exceeds 9.8 ft, set 164 ft or less.
(*5) : Extension up to 295 ft is possible, please contact manufacturers representative for review.
(*6) : In case the system capacity is greater than 22 ton, it is 9.8 ft. Up to 49 ft is possible, please contact manufacturers representative
for review.
(*7) : Extension up to 98 ft is possible, please contact our manufacturers representative for review.
(*8) : Ensure that the header unit is installed below all connected follower outdoor unit(s).
Possible product failure may occur if header unit is installed above any follower unit(s).
Capacity type 072 096 120 144 168 192 216 240 264 288 312 336 360 384 408 432 456
Applicable total
88 132 132 198 198 220 220 287 287 287 287 308 308 308 308 308 308
refrigerant amount (Ibs)
kg 40 55 55
Allowable
Pipes
value (ft)
LA + La + Lb + Lc + L1 + L2 + L3 +
L4 + L5 + L6 + L7 + L8 + L9 + L10 +
3281 (*1) L11 + L12 + L13 + L14 + a + b + c +
d + e + f + g + h + i + j + k + l + m +
n + o+ p + q + r + s + t + u + v
LA + Lc + L1 + L3 + L4 + L5 + L6 +
Equivalent length 656
L7 + L8 + o
(LA + Lc +L1 + L3 + L9 + L10 + L11 + t)
Real length 591
(LA + Lc + L1 + L3 + L9 + L12 + L13 + v)
Equivalent length 328
Real length 279
L1
Equivalent length 394
Real length 328
H1 > 9.8 ft 164 L3 + L4 + L5 + L6 + L7 + L8 + o
(L3 + L9 + L10 + L11 + t)
H1 9.8 ft 213
≦ (L3 + L9 + L12 + L13 + v)
49 LA + Lc (LA + Lb)
33 Lc (La, Lb)
a + f, b + g, c + h, d + i, e + j, k, l,
98
L6 + L7 + L8 + o (Ln)
Single port type 49 f, g, h, i, j, L7 + m, L7 + L8 + o
Mul ti port type
164
Single port long p, q, r, L11 + s, L11 + t, L13 + u, L13 + v
(*2) (*3)
piping type
164 L2, L3, L4, L5, L9, L10, L12
230
–
(*4) (*5)
98 –
131 –
49 (*7) –
16 –
0.5 m –
–
3 m
–
85 85 100 100 100 100 100 100 140 140 140 140 140 140
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