En-2
Limitation of refrigerant piping length
21 41 21
CAUTION
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.
24 type
Total max1 length (a+b+c)
50 m (164 ft)*
1
Max1 length for each indoor unit
(a, b or c)
25 m (82 ft)
Max1 height difference between
outdoor unit and each indoor unit
(H1)
15 m (49 ft)
Max1 height difference between
indoor units (H2)
10 m (33 ft)
Min1 length for each indoor unit
(a, b or c)
5 m (16 ft)
Total min1 length (a+b+c)
15 m (49 ft)
*1 If the total piping is longer than 30 m (98 ft), additional refrigerant charging is neces-
sary. (For more information, refer to “6.2 Additional charging”.)
System configuration
21 41
Layout example for the indoor units and outdoor unit
OUTDOOR UNIT
：
24 type
Power source
208/230 V ~ 60 Hz
Power cable
Connection cable
Refrigerant pipe
OUTDOOR UNIT
INDOOR UNITS
UNIT C
7-12
UNIT B
7-12
UNIT A
7-18
a
b
c
H1
H1
H2
Connectable indoor unit capacity type
21 41 11
CAUTION
The total capacity of the indoor units connected must be between 14,000 and 27,000
BTU.
Connection patterns are restricted. Normal operation 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
24 type
Indoor unit
1
2
2
1
7,000
7,000
–
2
9,000
7,000
–
3
12,000
7,000
–
4
18,000
7,000
–
5
9,000
9,000
–
6
12,000
9,000
–
7
18,000
9,000
–
8
12,000
12,000
–
9
7,000
7,000
7,000
10
9,000
7,000
7,000
11
12,000
7,000
7,000
12
9,000
9,000
7,000
13
9,000
9,000
9,000
Outdoor port
Connectable model name
Standard port size [mm (in1)]
C
6.35 (1/4) / 9.52 (3/8)
7 – 12
B
6.35 (1/4) / 9.52 (3/8)
7 – 12
A
6.35 (1/4) / 12.7 (1/2)
7 – 12
*1)
/18
*1) When connecting models 7–12 to the outdoor unit, the included adapter is necessary.
For more information, refer to “4.1.3. How to use adapter”.
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.)
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