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Refrigerant piping system
Calculation of amount of refrigerant
The calculation of the additional charge should take account of the diameter and length of the pipe.
A
Product Charge(kg)
B
Additional charge (kg)
=
Total liquid pipe (m): Ø25.4 mm
+
Total liquid pipe (m): Ø22.2mm
+
Total liquid pipe (m): Ø19.05mm
+
Total liquid pipe (m): Ø15.88mm
+
Total liquid pipe (m): Ø12.7mm
+
Total liquid pipe (m): Ø9.52mm
+
Total liquid pipe (m): Ø6.35mm
CF(kg)
+
(Correction Factor)
Total amount(kg)
CAUTION
If a negative result is obtained from
the calculation, no refrigerant needs
to be added.
CF value of indoor unit
Capacity(Btu/h(kW))
Type
Ceiling Concealed Duct (Low Static)
Ceiling Concealed Duct (High Static / Built in)
Wall Mounted / ARTCOOL Mirror
1Way Ceiling Cassette
2Way Ceiling Cassette
4Way Ceiling Cassette
ARTCOOL Gallery
Floor Standing
Ceiling & Floor
Ceiling Suspended
Console
Heat recovery ventilator(DX)
CAUTION
Use only 2-series of indoor unit. Ex) ARNU***2
* Ceiling Concealed Duct (Low Static) L1, L2, L3 Chassis models only
Do not combine for indoor unit of Fresh Air Intake Unit.
Do not combine for 54k or more indoor unit of ceiling concealed duct (high static) type.
26
26
Outside Unit
Outside Unit
x 0.480(kg/m)
x 0.354(kg/m)
x 0.266(kg/m)
x 0.173(kg/m)
x 0.118(kg/m)
x 0.061(kg/m)
x 0.022(kg/m)
=
+
A
B
5k
7k
9k
(1.6)
(2.2)
(2.8)
-
0.17
0.17
0.14*
0.14*
0.14*
-
0.26
0.26
-
0.24
0.24
-
0.20
0.20
-
-
-
0.18
0.18
0.25
-
0.10
0.10
-
0.17
0.17
-
-
0.10
-
-
-
-
0.17
0.17
-
-
-
Ex) 10HP
Outside unit
Header branch
Indoor unit
A : Ø9.52, 50m
B : Ø9.52, 10m
C : Ø9.52, 10m
D : Ø9.52, 10m
E : Ø6.35, 10m
Additional Charge = A x 0.061 + B x 0.061 + C x 0.061
+ D x 0.061 + E x 0.022 + CF
= 50 x 0.061 + 10 x 0.061 + 10 x 0.061
+ 10 x 0.061 + 10 x 0.022 + 0(CF)
= 5.1kg
12k
15k
18k
21k
(3.6)
(4.5)
(5.6)
(6.2)
0.17
0.17
0.37
-
0.19*
0.19*
0.19*
0.25*
0.26
0.26
0.26
-
0.24
0.24
0.28
-
0.20
-
0.29
-
-
-
0.16
-
0.25
0.32
0.32
-
0.10
-
-
-
0.17
0.17
0.37
-
0.10
-
-
-
-
-
0.35
-
0.17
0.17
-
-
0.20
-
0.20
-
(unit : kg)
24k
28k
36k
42k
(7.1)
(8.2) (10.6) (12.3) (14.1)
0.37
-
-
-
0.25*
0.26
0.44
0.44
0.44
0.28
-
-
-
0.29
-
-
-
0.16
-
-
-
0.48
0.48
0.64
0.64
-
-
-
-
0.37
-
-
-
-
-
-
-
0.35
-
0.54
-
-
-
-
-
0.20
-
-
-
48k
-
0.62
-
-
-
0.64
-
-
-
0.75
-
-
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