En-9
Piping length Chargeless [m]
30
Additional charging amount
Single type
L
*1
> Chargeless piping length
Refrigerant pipe
size
[mm (in.)]
Piping length
Standard
~30 m 40 m
50 m
60 m
70 m
80 m
90 m 100 m
g/m
Liquid
Gas
12.70 (1/2)
25.40 (1)
None 1,100 g 2,200 g 3,300 g 4,400 g 5,500 g 6,600 g 7,700 g 110 g/m
Size down
~30 m 40 m
50 m
60 m
70 m
80 m
90 m 100 m
g/m
Liquid
Gas
12.70 (1/2)
22.22 (7/8)
None 1,100 g 2,200 g 3,300 g 4,400 g 5,500 g 6,600 g 7,700 g 110 g/m
*1 : Refer to “View” in the table of “4.3.1. Single type installation”.
Simultaneous operation multi type
Twin : L1+L2+L3
(*2)
> Pre-charge length
Triple : L1+L2+L3+L4
(*2)
> Pre-charge length
Double-twin: L1+L2+L3+L4+L5+L6+L7
(*2)
> Pre-charge length
*2 : Refer to “View” in the table of “4.3.2. Simultaneous operation multi type installation.”
The additional charging amount for twin / triple / double-twin type will be calculated as fol-
lows:
Additional charging amount (g)
= (A x 110) + (B x 50) + (C x 30) - 3,300
• A = Piping length (m) of liquid pipe [12.70 mm (1/2 in.)]
• B = Piping length (m) of liquid pipe [9.52 mm (3/8 in.)]
• C = Piping length (m) of liquid pipe [6.35 mm (1/4 in.)]
Do not remove refrigerant, even if the additional amount calculated is negative.
sd
Indoor unit
(45,000 Btu)
Outdoor unit
(90,000 Btu)
Indoor unit
(45,000 Btu)
Liquid pipe [mm]
9.52
Gas pipe [mm]
15.88
Liquid pipe [mm]
9.52
Gas pipe [mm]
15.88
Liquid pipe [mm]
12.70
Gas pipe [mm]
25.40
(Example 1)
L2 : 10 m
L1 : 30 m
L3 : 7 m
Liquid pipe diameter
[mm]
Piping length
[m]
Coef
fi
cient
12.70
30
A = 30
9.52
17
B = 17
6.35
0
C = 0
Additional charging amount
Applying the formula,
(30 x 110) + (17 x 50) + (0 x 30) - 3300 = 850
The additional charging amount is 850 g.
Liquid pipe diameter
[mm]
Piping length
[m]
Coef
fi
cient
12.70
10
A = 10
9.52
15
B = 15
6.35
0
C = 0
Additional charging amount
Applying to the formula,
(10 x 110) + (15 x 50) + (0 x 30) - 3300 = -1450
The calculated value is negative. Do not add or remove any refrigerant.
(Example 2)
Indoor unit
(30,000 Btu)
Indoor unit
(30,000 Btu)
Outdoor unit
(90,000 Btu)
Indoor unit
(30,000 Btu)
Liquid pipe [mm]
9.52
Gas pipe [mm]
15.88
Liquid pipe [mm]
9.52
Gas pipe [mm]
15.88
Liquid pipe [mm]
9.52
Gas pipe [mm]
15.88
Liquid pipe [mm]
12.70
Gas pipe [mm]
25.40
L3 : 5 m
L1 : 10 m
L4 : 5 m
L2 : 5 m
Liquid pipe diameter
[mm]
Piping length
[m]
Coef
fi
cient
12.70
20
A = 20
9.52
20
B = 20
6.35
20
C = 20
Additional charging amount
Applying to the formula,
(20 x 110) + (20 x 50) + (20 x 30) - 3300 = 500
The additional charging amount is 500 g.
(Example 3)
Indoor unit
(18,000 Btu)
Indoor unit
(18,000 Btu)
Outdoor unit
(72,000 Btu)
Indoor unit
(18,000 Btu)
Indoor unit
(18,000 Btu)
Liquid pipe [mm]
6.35
Gas pipe [mm]
12.70
Liquid pipe [mm]
6.35
Gas pipe [mm]
12.70
Liquid pipe [mm]
6.35
Gas pipe [mm]
12.70
Liquid pipe [mm]
6.35
Gas pipe [mm]
12.70
Liquid pipe [mm] 12.70
Gas pipe [mm]
25.40
L5 : 5 m
L1 : 20 m
L6 : 5 m
L7 : 5 m
L4 : 5 m
L2 : 10 m
L3 : 10 m
Liquid pipe [mm]
9.52
Gas pipe [mm]
15.88
Liquid pipe [mm]
9.52
Gas pipe [mm]
15.88
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9380545231_IM.indb 9
7/14/2017 8:53:12 AM
7/14/2017 8:53:12 AM
