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444 SYSTEM CONFIGURATION
444444 System configuration
In case of one outdoor unit connected
•• From outdoor unit to the farthest indoor unit:
a+f <
= 150m, a+p <
= 150m (actual pipe length)
•• From the first separation tube to the farthest indoor unit:
f<
= 60m, p <
= 60m (actual pipe length)
•• Difference in height between outdoor units and indoor units (H1)
50m: For the indoor unit stated below
40m: For the outdoor unit stated below
•• Difference in height between indoor units and indoor units
H2 <
= 15m, H3 <
= 15m
•• Total pipe length
a+f+h+j+l+n+p+q+s+u <
= 700m
•• Total refrigerant amount <
= 31.5kg
FFFFFA
Outdoor
unit
(Master)
h
j
n
Indoor
unit
Indoor
unit
Indoor
unit
H1
Indoor
unit
p
q
s
Indoor
unit
u
Indoor
unit
H2
Indoor
unit
H3 Indoor
unit
FFFFFB
Outdoor
unit 1
(Master)
Outdoor
unit 2
(Slave)
H4
a
b
e
f
h
j
l
Indoor
unit
In the case of three outdoor units connected
•• From outdoor unit to the farthest indoor unit:
a+e+f <
= 150m, a+e+p <
= 150m (actual pipe length)
•• From the first separation tube to the farthest indoor unit:
f<
= 60m, p <
= 60m (actual pipe length)
•• Difference in height between outdoor units and indoor units (H1)
50m: For the indoor unit stated below
40m: For the outdoor unit stated below
•• Difference in height between indoor units and indoor units (H2,H3)
H2 <
= 15m, H3 <
= 15m
•• Difference in height between outdoor unit and outdoor units (H4)
H4 <
= 0.5m
•• From outdoor unit to outdoor unit branch kit
a<
= 3m, b <
= 3m, c <
= 3m
•• Between the farthest outdoor unit to the first outdoor unit branch kit
b+d <
= 12m, c+d <
= 12m
•• Total pipe length
a+b+c+d+e+f+h+j+l+n+p+q+s+u <
= 1000m
•• Total refrigerant amount <
= 94.5kg
•• Outdoor unit capacity
Master >
= slave 1 >
= slave 2
NNNNNN • If the outdoor temperature during cooling operation is
expected to be –5 °C or less, do not install the outdoor unit
lower than the indoor unit.
・Please refer to “8.3.2. Checking total amount of refrigerant
and calculating the amount of refrigerant charge to be
added” for the total amount of refrigerant.
l
Indoor
unit
In case of two outdoor unit connected
•• From outdoor unit to the farthest indoor unit:
a+e+f <
= 150m, a+e+p <
= 150m (actual pipe length)
•• Difference in height between outdoor units and indoor units (H1)
50m: For the indoor unit stated below
40m: For the outdoor unit stated below
•• From the first separation tube to the farthest indoor unit
f<
= 60m, p <
= 60m (actual pipe length)
•• Difference in height between indoor units and indoor units (H2, H3)
H2 <
= 15m, H3 <
= 15m
•• Difference in height between outdoor unit and outdoor units (H4)
H4 <
= 0.5m
•• From outdoor unit to outdoor unit branch kit
a<
= 3m, b <
= 3m
•• Total pipe length
a+b+e+f+h+j+l+n+p+q+s+u <
= 1000m
•• Total refrigerant amount <
= 63kg
•• Outdoor unit capacity
Master >
= slave
a
f
n
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
H1
p
q
s
Indoor
unit
Indoor
unit
u
H2
Indoor
unit
H3 Indoor
unit
FFFFFC
Outdoor
unit 1
(Master)
Outdoor
unit 2
(Slave 1)
Outdoor
unit 3
(Slave 2)
H4
a
b
c
d
e
f
j
h
Indoor
unit
l
Indoor
unit
H1
n
Indoor
unit
Indoor
unit
Indoor
unit
p
q
Indoor
unit
s
Indoor
unit
u
H2
Indoor
unit
H3
Indoor
unit
En-11
English
CAUTION
•• When connecting multiple outdoor units, set the nearest outdoor unit to the indoor unit on the refrigerant pipe as the master unit.
•• When connecting multiple outdoor units, install the outdoor unit with the largest nominal system capacity nearest
to the indoor unit and on the refrigerant pipe, followed by those with less nominal system capacities.
•• Always keep to the limit on the total amount of refrigerant.Exceeding the limit on the total amount of refrigerant
when charging will lead to malfunction.