System Configuration; Piping Limitation And Pipe Size - Fujitsu AOU48RLXFZ1 Installation Manual

• Do not install directly on the ground, this may result in equipment
failure.
2" (5 cm) or over
In areas with heavy snowfall , where intake and outlet of the outdoor unit can become blocked
by snow.
It is recommended that unit be installed under a canopy or elevated on a high stand.
Failure to do so will result in poor heating performance and/or premature failure of equipment.
41

SYSTEM CONFIGURATION

41 11

Piping limitation and Pipe size

Outdoor
Unit
Outdoor
Unit
H2
H2
H1
H1
Pipe limitation
Maximum total equivalent pipe length
Maximum total equivalent pipe length
Between outdoor unit and the farthest indoor unit
Between outdoor unit and the farthest indoor unit
Between outdoor unit and branch boxes
Between outdoor unit and branch boxes
Between branch box and indoor unit
Between branch box and indoor unit
Between outdoor unit and the first separation tube
Between outdoor unit and the first separation tube
Between outdoor unit and branch box (when there is no separation tube
Between outdoor unit and branch box (when there is no separation tube
Between outdoor unit and indoor unit
Between outdoor unit and indoor unit
Between outdoor unit and branch box
Between outdoor unit and branch box
Between branch box and branch box
Between branch box and branch box
Between indoor unit and indoor unit
Between indoor unit and indoor unit
Pipe size selection
Between outdoor unit and first
separation tube
Between first separation tube and
second separation tube
Between separation tube and
branch box
Between branch box and indoor unit
CAUTION
Separation Tube
Separation Tube
b
a
b
a
d
d
H3
(Primary)
H3
(Primary)
Branch Box
Branch Box
g
f
g
f
h
h
Indoor
Indoor Unit2
Indoor
Unit1
Indoor
Unit2
Unit1
Indoor
Unit3
Indoor
Unit3
Diagram
a
b
c, d, e
f, g, h, i,
j, k, l, m
e
(Secondary1)
e
(Secondary1)
Branch Box
Branch Box
i
j
i
k
j
k
Indoor
Unit4
Indoor
Unit4
Indoor Indoor
H4 Unit5 Unit6
Indoor Indoor
H4 Unit5 Unit6
Limitation
Limitation
m (ft)
m (ft)
115 or less (377)
115 or less (377)
70 or less (230)
70 or less (230)
55 or less (180)
55 or less (180)
Total 60 or less (197)
Total 60 or less (197)
Each unit Between 3-15 (10-49)
Each unit Between 3-15 (10-49)
5 or more (16)
5 or more (16)
5 or more (16)
5 or more (16)
30 or less (98)
30 or less (98)
30 or less (98)
30 or less (98)
15 or less (49)
15 or less (49)
15 or less (49)
15 or less (49)
Condition
(Model code of indoor unit)
7 ,9, 12
18
24
c
c
(Secondary2)
(Secondary2)
Branch Box
Branch Box
l
l m
m
Indoor
Unit7
Indoor
Unit7 Indoor
Unit8
Indoor
Unit8
Diagram
Diagram
Total
Total
a + b + c + m
a + b + c + m
a + b + c + d + e
a + b + c + d + e
f + g + h + i + j + k + l + m
f + g + h + i + j + k + l + m
f, g, h, i, j, k, l, m
f, g, h, i, j, k, l, m
a
a
a+d
a+d
H1
H1
H2
H2
H3
H3
H4
H4
Gas pipe Liquid pipe
(mm(in.)) (mm(in.))
Φ15.88 (5/8) Φ9.52 (3/8)
Φ15.88 (5/8) Φ9.52 (3/8)
Φ15.88 (5/8) Φ9.52 (3/8)
Φ9.52 (3/8) Φ6.35 (1/4)
Φ12.70 (1/2) Φ 6.35 (1/4)
Φ15.88 (5/8) Φ6.35 (1/4)
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