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En-11
SYSTEM CONFIGURATION
4.
System con
fi
guration
4. 1.
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.
In case of 1 outdoor unit connected
A)
From outdoor unit to the farthest indoor unit:
•
a+f
<
=
150m, a+p
<
=
150m (actual pipe length)
From the
fi
rst 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
In case of 2 outdoor unit connected
B)
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
fi
rst 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
In the case of 3 outdoor units connected
C)
From outdoor unit to the farthest indoor unit:
•
a+e+f
<
=
150m, a+e+p
<
=
150m (actual pipe length)
From the
fi
rst 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
fi
rst 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
• If the outdoor temperature during cooling operation is
NOTE)
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 refriger-
ant and calculating the amount of refrigerant charge to be
added” for the total amount of refrigerant.
A
Fig.
Outdoor
unit
(Master)
Indoor
unit
f
h
p
q
j
s
l
u
H3
n
H1
H2
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
a
B
Fig.
Outdoor
unit 1
(Master)
Outdoor
unit 2
(Slave)
f
e
a
H4
h
p
q
j
s
l
u
H3
n
H1
H2
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
b
C
Fig.
Outdoor
unit 3
(Slave 2)
Outdoor
unit 2
(Slave 1)
Outdoor
unit 1
(Master)
f
e
c
b
a
H4
d
h
p
q
j
s
l
u
n
H1
H2
H3
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
9378945029-03_IM_EN.indb 11
9378945029-03_IM_EN.indb 11
2011-9-20 16:25:48
2011-9-20 16:25:48