Toshiba MMY-MUP0801HT8P-E Installationsanleitung Seite 68

Allowable length of refrigerant pipes and allowable height
difference between units
Height
A B C
difference Header Follower Follower
between unit
outdoor
units
H3
≤ 5 m
Outdoor
(a) (b) (c)
Height
difference
between
outdoor
and indoor Equivalent length corresponded to farthest piping
LO
units: Main between outdoor unit < 40 m
H1
≤ (70 m) piping
L1 Y-shape branching
joint for gas pipe
Branching piping
Connecting piping of indoor unit
1st branching
section
a
L3
Equivalent length corresponded to farthest piping
Equivalent length corresponded to farthest piping after 1st branching
L4
Y-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.)
133-EN
IM_1141001201-2_Book.indd 67 IM_1141001201-2_Book.indd 67
E
Follower
unit
(e)
D
Follower
(d)
Y-shape branching
joint for liquid pipe
Branching
L2 header
L7
Y-joint
b c d e
Indoor unit
L
≤ 250 m
Li
≤ 90 m
L5 L6
g h i j
(j)
Indoor unit
Up to 5 units
Up to 120 HP
Up to 128 units
Single 200% of outdoor units' capacity
H2 ≤ 15 m
Combination 150% of outdoor units' capacity
H2 > 15 m 105% of outdoor units' capacity
– 67 –
Cautions for installation
• Set the outdoor unit first 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 ≥ D ≥ E
• 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 figure 1 on "6. Installation of the outdoor unit". Do not
connect them as in figure 2 on "6. Installation of the outdoor unit".
Allowable length and allowable height difference of refrigerant piping
Item
Total extension of pipe (Liquid
pipe, real length)
Farthest piping Length L (*1)
Max. equivalent length of main
Piping length
piping
Equivalent length of farthest piping from 1st
branching Li (*1)
Equivalent length of farthest piping between
outdoor units LO
Max. equivalent length of outdoor unit connecting
piping
Max. real length of indoor unit connecting piping
Max. equivalent length between branches
Height between indoor and
outdoor units H1
Difference in
height
Height between indoor units H2
Height
difference Height between outdoor units H3
between
*1: (E) is outdoor unit furthest from the 1st branch and (j) is the indoor unit furthest from the 1st branch.
indoor
*2: If the height difference between indoor and outdoor unit (H1) exceeds 3 m, the piping length is 65 m or less.
units:
H2 *3: If the max. combined outdoor unit capacity is 54HP or more, then max. equivalent length is 70 m or less (real length is
≤ 40 m
50 m or less).
*4: If the height difference between indoor units (H2) exceeds 3 m, the difference in height is 50 m or less.
*5: If the height difference between indoor units (H2) exceeds 3 m, the difference in height is 30 m or less.
*6: Total charging refrigerant is 140 kg or less.
*7: Extension up to 110 m is possible with conditions below :
• Independent outdoor unit system
• Capacity of combined indoor units : 105% or less
• Liquid side has been increased one size from the standard size.
•The height difference between indoor units(H2) is 3m or less.
*8: Extension up to 110 m is possible with conditions below :
• System combining two or more outdoor units
• Capacity of combined indoor units : 105% or less
• Minimum capacity of connecting indoor unit is more than 3HP
•The height difference between indoor units(H2) is 3m or less.
Allowable
Piping section
value
Single outdoor
500 m
unit system LA + LB + LC + La + Lb + Lc + Ld + Le +
Multiple L1 + L2 + L3 + L4 + L5 + L6 + L7 + a + b
+ c + d + e + f + g + h + i + j
outdoor unit 1200 m (*6)
system
Equivalent
250 m
LA + LB + LC + Le + L1 + L3 + L4 + L5
length
+ L6 + j
Real length 210 m
Equivalent
120 m (*3)
length
L1
Real length 100 m (*3)
90 m (*2) L3 + L4 + L5 + L6 + j
40 m LA + LB + LC + Le (LA + LB + LC + Ld)
10 m La, Lb, Lc, Ld, Le
30 m a, b, c, d, e, f, g, h, i, j
50 m L2, L3, L4, L5, L6, L7
Upper 70 m
–
outdoor unit (*4,*7)
Lower 40 m
–
outdoor unit (*5, *8)
40 m –
5 m –
134-EN
5/2/2564 BE 16:27 5/2/2564 BE 16:27