System Configuration - Fujitsu R410A Installation Manual

21 41

System configuration

Layout example for the indoor units and outdoor unit
Power source
Power cable
208/230 V ~ 60 Hz
Connection cable
OUTDOOR UNIT
Refrigerant pipe
21 41 11 Connectable indoor unit capacity type
The total capacity of the indoor units connected must be between 27,000 and 39,000
BTU.
Connection patterns are restricted. Normal operatio n is not guaranteed if connected
pattern in the combination not listed below. The product may be damaged. Surely
connect in accordance with the combination in the following connection pattern.
• To install an indoor unit, refer to the installation instruction sheet included with the
indoor unit.
Indoor unit connection pattern
1
1)
1 18,000*
2 9,000
3 12,000
4 12,000
5 12,000
6 12,000
7 12,000
8 18,000
9 18,000
10 18,000
11 18,000
12 18,000
13 24,000
14 7,000
15 9,000
16 9,000
17 9,000
18 9,000
19 12,000
20 12,000
21 12,000
22 12,000
2)
23 18,000*
*1) An optional kit is required for the "18+18" combination. For more information, contact
your local dealer.
*2) ARU18RLF and AUU18RLF only. Wall mounted ASU18RLF cannot be connected in
this combination.
Outdoor port
Standard port size [mm (in1)]
D 6.35 (1/4) / 9.52 (3/8)
C 6.35 (1/4) / 9.52 (3/8)
B 6.35 (1/4) / 9.52 (3/8)
A 6.35 (1/4) / 12.7 (1/2)
*1,*2 When connecting models 7–12 to the outdoor unit, the included adapter is neces-
sary. (For more information, refer to "4.1.3. How to use adapter".)
En-2
9374747115_IM_En.indd 3
UNIT D
d 7-12
UNIT C
c 7-12
UNIT B
b
7-18
UNIT A
a 7-24
INDOOR UNITS
CAUTION
Indoor unit
2 2 4
1)
18,000* – –
9,000 9,000 –
9,000 9,000 –
12,000 7,000 –
12,000 7,000 –
12,000 9,000 –
12,000 12,000 –
7,000 7,000 –
9,000 7,000 –
9,000 9,000 –
12,000 7,000 –
12,000 9,000 –
7,000 7,000 –
7,000 7,000 7,000
7,000 7,000 7,000
9,000 7,000 7,000
9,000 9,000 7,000
9,000 9,000 9,000
7,000 7,000 7,000
9,000 7,000 7,000
9,000 9,000 7,000
12,000 7,000 7,000
7,000 7,000 7,000
Connectable model name
7 – 12
7 – 12
7 – 12
1 2
7 – 12* /18/24*
H1
H2
H1
21 41 21 Limitation of refrigerant piping length
The total maximum pipe lengths and height difference of this product are shown in the
table.
If the units are further apart than this, correct operation cannot be guaranteed.
Total max1 length (a+b+c+d)
Max1 length for each indoor unit
(a, b , c or d)
Max1 height difference between
outdoor unit and each indoor unit
(H1)
Max1 height difference between
indoor units (H2)
Min1 length for each indoor unit
(a, b , c or d)
Total min1 length (a+b+c+d)
*1) If the total piping is longer than 50 m (164 ft), additional refrigerant charging is neces-
)
sary. (For more information, refer to "6.2. Additional charging".)
21 41 21 Selecting pipe sizes
The diameters of the connection pipes differ according to the capacity of the indoor unit.
Refer to the following table for the proper diameters of the connection pipes between the
indoor and outdoor units.
Capacity of indoor
unit
7 – 12
18
24
Operation cannot be guaranteed if the correct combination of pipes, valves, etc., is not
used to connect the indoor and outdoor units.
21 41 41 Heat insulation around connection pipes requirements
Install heat insulation around both the gas and liquid pipes.
Failure to do so may cause water leaks.
Use heat insulation with heat resistance above 248 °F. (Reverse cycle model only)
In addition, if the humidity level at the installation location of the refrigerant piping is
expected to exceed 70%, install heat insulation around the refrigerant piping. If the
expected humidity level is 70-80%, use heat insulation that is 19/32 in. or thicker and if
the expected humidity exceeds 80%, use heat insulation that is 25/32 in. or thicker.
If heat insulation is used that is not as thick as specified, condensation may form on
the surface of the insulation. In addition, use heat insulation with heat conductivity of
0.045 W/(m·K) or less (at 68 °F).
Connect the connection pipes according to "4.1. Flare connection" in this installation
manual.
21 41 21 Operating range
Temperature
Maximum
Cooling
Minimum
Maximum
Heating
Minimum
UNIT D ø6.35mm, ø9.52mm (ø1/4 in., ø3/8 in.)
UNIT C ø6.35mm, ø9.52mm (ø1/4 in., ø3/8 in.)
UNIT B ø6.35mm, ø9.52mm (ø1/4 in., ø3/8 in.)
UNIT A ø6.35mm, ø12.7mm (ø1/4 in., ø1/2 in.)
CAUTION
70 m (230 ft)*
25 m (82 ft)
15 m (49 ft)
10 m (33 ft)
5 m (16 ft)
20 m (66 ft)
Gas pipe size Liquid pipe size
(thickness) (thickness)
[mm (in1)] [mm (in1)]
ø9.52 (0.8) (3/8 (1/32)) ø6.35 (0.8) (1/4 (1/32))
ø12.7 (0.8) (1/2 (1/32)) ø6.35 (0.8) (1/4 (1/32))
ø15.88 (1.0) (5/8 (5/128)) ø6.35 (0.8) (1/4 (1/32))
CAUTION
CAUTION
Indoor air intake Outdoor air intake
90 °F DB 115 °F DB
65 °F DB 32 °F DB
88 °F DB 75 °F DB
60 °F DB 14 °F DB
Indoor humidity about 80% or less
1)
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