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4. Installation Details
5.1 Wrench torque sheet for installation
Outside
diameter
Torque
Additional tightening
torque
mm inch N.cm N.cm
Ф6.35 1/4 1500 (11 LbF*Ft) 1600 (12 LbF*Ft)
Ф9.52 3/8 2500 (18 LbF*Ft) 2600 (19LbF*Ft)
Ф12.7 1/2 3500 (26 LbF*Ft) 3600 (27 LbF*Ft)
5.2 Connecting the cables
The main power input connection wire size
should be selected according to the following
table.
Unit AWG
DUAL (2 Zone) 14
TRIPLE (3 Zone) 14
QUAD (4 Zone) 12
QUINT (5 Zone) 10
For the cable set connecting indoor units to the
outdoor unit, use 16AWG (for all indoor types).
5.3 Pipe length and the elevation
Maximum piping length and height difference
2 Zone 3 Zone 4 Zone 5 Zone
Max. length for all
rooms (m)
30
(100ft)
45
(150ft)
60
(200ft)
75
(250ft)
Max. length to one
Indoor Unit (m)
20 (65ft) 25 (80ft)
30
(100ft)
30
(100ft)
Max.
height
difference
between
Indoor /
Outdoor
(m)
ODU
higher
than
IDU
10 (33ft) 10 (33ft)
10
(33ft)
10 (33ft)
ODU
lower
than
IDU
15 (50ft) 15 (50ft)
15
(50ft)
15 (50ft)
Max. height
difference between
Indoor Units (m)
10 (33ft) 10 (33ft)
10
(33ft)
10 (33ft)
Additional refrigerant charge
2 Zone 3 Zone 4 Zone 5 Zone
Pre-charged up to
max total pipe
length m (ft)
15
(50 ft)
22.5
(75 ft)
30
(100 ft)
37.5
(125 ft)
Additional
refrigerant
charge
needed
beyond
total max
length
g
15 g per
excess
meter
beyond
total 15
meters
15 g per
excess
meter
beyond
total 23
meters
15 g per
additiona
l feet
beyond
total 30
feet
15 g per
additional
feet
beyond
total 38
feet
oz
0.16 oz
per
excess
foot
beyond
total 50
feet
0.16 oz
per
excess
foot
beyond
total 75
feet
0.16 oz
per
excess
foot
beyond
total 100
feet
0.16 oz
per
excess
foot
beyond
total 125
feet
Caution:
● Refrigerant pipe diameters change according to
indoor unit model to be connected. When
extending the pipes, refer to the tables below.
● When refrigerant pipe diameter is different from
that of the outdoor unit connectors, additional
adapter(s) would be required and will be factory
supplied with your unit.
Indoor unit
Extension pipe diameter
(mm/inch)
Model
Pipe diameter
(mm/inch)
9K
Liquid 6.35 (1/4) Liquid 6.35 (1/4)
Gas 9.52 (3/8) Gas 9.52 (3/8)
12K 18K
Liquid 6.35 (1/4) Liquid 6.35 (1/4)
Gas 12.7 (1/2) Gas 12.7 (1/2)
24K
Liquid 9.52 (3/8) Liquid 9.52 (3/8)
Gas 15.9 (5/8) Gas 15.9 (5/8)
Outdoor unit union diameter (mm/inch)
Dual(2Zone)
Liquid
6.35 (1/4)
*2
Gas
9.52 (3/8)
*2
Triple(3Zone)
Liquid
6.35 (1/4)*3
Gas
9.52 (3/8)
*3
Quad(4Zone)
Liquid
6.35 (1/4)*4
Gas
9.52 (3/8)
*3
12.7 (1/2) *1
Quint(5Zone)
Liquid
6.35 (1/4)*5
Gas
9.52 (3/8)
*3
12.7 (1/2) *2
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