En-10
A) In case of one outdoor unit connected
• From outdoor unit to the farthest indoor unit:
e+f+g+i+k+m
<
=
150 m (actual pipe length),
e+o+p+r+t
<
=
150 m (actual pipe length)
• From the first separation tube to the farthest indoor unit:
o+p+r+t
<
=
60 m (actual pipe length)
• Difference in height between outdoor units and indoor units (H1)
50 m: For the indoor unit stated below
40 m: For the outdoor unit stated below
• Difference in height between indoor units and indoor units
H2
<
=
15 m, H3
<
=
15 m
• e+f+g+h+i+j+k+l+m+n+o+p+q+r+s+t+u
<
=
300 m (total pipe length)
NOTE : If the outdoor temperature during cooling operation
is expected to be –5 °C or less, do not install the out-
door unit lower than the indoor unit.
B) In case of two outdoor unit connected
• From outdoor unit to the farthest indoor unit:
a+e+f+g+i+k+m
<
=
150 m (actual pipe length)
a+e+o+p+r+t
<
=
150 m (actual pipe length)
• Difference in height between outdoor units and indoor units (H1)
50 m: For the indoor unit stated below
40 m: For the outdoor unit stated below
• From the first separation tube to the farthest indoor unit:
o+p+r+t
<
=
60 m (actual pipe length)
• Difference in height between indoor units and indoor units (H2, H3)
H2
<
=
15 m, H3
<
=
15 m
• Difference in height between outdoor unit and outdoor units: (H4)
H4
<
=
0.5 m
• From outdoor unit to outdoor unit branch kit
a, d
<
=
3 m
• a+d+e+f+g+h+i+j+k+l+m+n+o+p+q+r+s+t+u
<
=
300 m (total pipe
length)
• Outdoor capacity
Master
>
=
Slave
C) In case of three outdoor unit connected
• From outdoor unit to the farthest indoor unit:
a+e+f+g+i+k+m
<
=
150 m (actual pipe length)
a+e+o+p+r+t
<
=
150 m (actual pipe length)
• From the first separation tube to the farthest indoor unit:
o+p+r+t
<
=
60 m (actual pipe length)
• Difference in height between outdoor units and indoor units (H1)
50 m: For the indoor unit stated below
40 m: For the outdoor unit stated below
• Difference in height between indoor units and indoor units (H2, H3)
H2
<
=
15 m, H3
<
=
15 m
• Difference in height between outdoor unit and outdoor units: (H4)
H4
<
=
0.5 m
• From outdoor unit to outdoor unit branch kit
a, b, c
<
=
3 m
• Piping length between the farthest outdoor unit to the first out-
door unit branch kit
a, b, c
<
=
3 m, c+d, b+d
<
=
12 m
• a+b+c+d+e+f+g+h+i+j+k+l+m+n+o+p+q+r+s+t+u
<
=
300 m (to-
tal pipe length)
• Outdoor unit capacity
Master
>
=
Slave 1
>
=
Slave 2
4.5. SYSTEM LAYOUT
CAUTION
If there are multiple outdoor units to be connected, make sure to install the master unit near the indoor unit.
If 3 outdoor units are to be connected, install them in descending order, starting with the one with the largest
capacity closest to the indoor unit.
Fig. 4.5-1
Fig. 4.5-2
Fig. 4.5-3
fg
e
ik m
o
p
qs
hjln
Outdoor
unit
(Master)
rt
H3
H2
H1
u
H3
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Outdoor
unit 1
(Master)
Outdoor
unit 2
(Slave)
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
H4
a
fg
ed
ik m
o
p
q
s
hjln
rt
H3
H2
H1
u
H3
Outdoor
unit 1
(Master)
Outdoor
unit 2
(Slave 1)
Outdoor
unit 3
(Slave 2)
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
c
H4
b
fg
ed
ik m
o
p
q
s
hjln
rt
H3
H2
H1
u
H3
a
9374241033_IM_en_p01-17.p65 26/8/2008, 18:2310
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