System Layout - Fujitsu AJ**A72LBTF Installation Instruction Sheet

4.5. SYSTEM LAYOUT

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.
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
En-10
9374241033_IM_en_p01-17.p65
CAUTION
10
Fig. 4.5-1
Outdoor
unit
(Master)
e
f g i k
h j l
o Indoor Indoor Indoor
unit unit unit
p r
q s
Indoor Indoor
unit unit
Fig. 4.5-2
Outdoor
unit 2
(Slave)
Outdoor
unit 1
H4
(Master)
a
e d
f g i k
h j l
o
Indoor Indoor Indoor
unit unit unit
p r
q s
Indoor Indoor
unit unit
Fig. 4.5-3
Outdoor
unit 3
(Slave 2)
Outdoor
Outdoor
unit 1 unit 2
H4
(Master) (Slave 1)
c
a b
e d
f g i k
h j l
o
Indoor Indoor Indoor
unit unit unit
p r
q s
Indoor Indoor
unit unit
26/8/2008, 18:23
m
n
H1
Indoor
unit
Indoor
H3
t
unit
H2
u
Indoor
unit
Indoor
H3
unit
m
n
H1
Indoor
unit
Indoor
H3
t
unit
H2
u
Indoor
unit
Indoor
H3
unit
m
n
H1
Indoor
unit
Indoor
H3
t
unit
H2
u
Indoor
unit
Indoor
H3
unit