LG ARUN038GS2 Installation Manual - Page 34

The Amount of Refrigerant

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Refrigerant piping installation x The Amount of Refrigerant The calculation of the additional charge should take account of the length of pipe. A Product charge(1unit)(kg(lbs)) B Additional charge (kg(lbs)) = Total liquid pipe (m(ft)): Ø22.2mm(7/8inch) x 0.237 lbs/ft + Total liquid pipe (m(ft)): Ø19.05mm(3/4inch) x 0.178 lbs/ft + Total liquid pipe (m(ft)): Ø15.88mm(5/8inch) x 0.116 lbs/ft + Total liquid pipe (m(ft)): Ø12.7mm(1/2inch) x 0.079 lbs/ft + Total liquid pipe (m(ft)): Ø9.52mm(3/8inch) x 0.041 lbs/ft + Total liquid pipe (m(ft)): Ø6.35mm(1/4inch) x 0.015 lbs/ft + Number of installed HR units x 1.1 lbs + CF(kg(lbs)) (Correction factor) Total amount(kg(lbs)) = A + B CAUTION If a negative result is obtained from the calculation, no refrigerant needs to be added. Ex) 10HP Outdoor unit HR unit (1EA) Indoor unit A: Ø12.7(1/2), 50m(164ft) B: Ø9.52(3/8), 10m(33ft) C: Ø9.52(3/8), 10m(33ft) D: Ø9.52(3/8),10m(33ft) E: Ø6.35(1/4), 10m(33ft) Additional Charge = A x 0.061 + B x 0.061 + C x 0.061 + (a+b+c+d+e) x 0.022 + CF = 40 x 0.061 + 20 x 0.061 + 20 x 0.061 + (10 x 5) x 0.022 + 0.5(HR)+0(CF) = 6.48(kg) Additional Charge = A x 0.061 + B x 0.061 + C x 0.061 +(a + b + c + d + e) x 0.022 + CF = 131 x 0.041 + 65.6 x 0.041 + 65.6 x 0.041 + (32.8 x 5) x 0.015 +1.1(HR)+0(CF) = 14.3(lbs) HP(Ton) Product Charge(kg(lbs)) CF(kg(lbs)) 8(6.5) 8 (17.6) -1 (-2.2) 10(8.0) 8 (17.6) 0 (0) 12(9.5) 8 (17.6) 1 (2.2) 14(11.0) 8 (17.6) 16(12.5) 18(14.5) 8 16 (17.6) (35.3) 20(16.0) 16 (35.3) 22(17.5) 16 (35.3) 24(19.0) 16 (35.3) 26(20.5) 16 (35.2) 28(22.5) 16 (35.2) 2 3 -1 0 1 2 (4.4) (6.6) (-2.2) (0) (2.2) (4.4) 3(6.6) 4(8.8) HP(Ton) Product Charge(kg(lbs)) 30(24.0) 16 (35.2) 32(25.5) 16 (35.2) 34(27.0) 24 (52.8) 36(28.5) 24 (52.8) 38(30.0) 24 (52.8) 40(32.0) 24 (52.8) 42(33.5) 24 (52.8) 44(35.0) 24 (52.8) 46(36.5) 24 (52.8) 48(38.0) 24 (52.8) CF(kg(lbs)) 5(11.0) 6(13.2) 2(4.4) 3(6.6) 4(8.8) 5(11.0) 6(13.2) 7(15.4) 8(17.6) 9(19.8) 34 Outdoor Unit

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34
Outdoor Unit
◆
The Amount of Refrigerant
The calculation of the additional charge should take account of the length of pipe.
Additional charge (kg(lbs))
Product charge(1unit)(kg(lbs))
=
+
+
+
+
+
+
=
+
Total liquid pipe (m(ft)): Ø22.2mm(7/8inch)
x 0.237 lbs/ft
x 0.178 lbs/ft
x 0.116 lbs/ft
x 0.079 lbs/ft
x 0.041 lbs/ft
x 0.015 lbs/ft
Total liquid pipe (m(ft)): Ø19.05mm(3/4inch)
Total liquid pipe (m(ft)): Ø15.88mm(5/8inch)
Total liquid pipe (m(ft)): Ø12.7mm(1/2inch)
Total liquid pipe (m(ft)): Ø9.52mm(3/8inch)
Total liquid pipe (m(ft)): Ø6.35mm(1/4inch)
+
x 1.1 lbs
Number of installed HR units
CF(kg(lbs)) (Correction factor)
Total amount(kg(lbs))
If a negative result is obtained
from
the calculation, no refrigerant needs
to be added.
A
A
B
B
CAUTION
Outdoor unit
HR unit (1EA)
Indoor unit
Ex) 10HP
Additional Charge = A x 0.061 + B x 0.061 + C x 0.061
+ (a+b+c+d+e) x 0.022 + CF
= 40 x 0.061 + 20 x 0.061 + 20 x 0.061
+ (10 x 5) x 0.022 + 0.5(HR)+0(CF)
=
6.48(kg)
Additional Charge = A x 0.061 + B x 0.061 + C x 0.061
+(a + b + c + d + e) x 0.022 + CF
= 131 x 0.041 + 65.6 x 0.041 + 65.6 x 0.041
+ (32.8 x 5) x 0.015 +1.1(HR)+0(CF)
= 14.3(lbs)
A: Ø12.7(1/2), 50m(164ft)
B: Ø9.52(3/8), 10m(33ft)
C: Ø9.52(3/8), 10m(33ft)
D: Ø9.52(3/8),10m(33ft)
E: Ø6.35(1/4), 10m(33ft)
HP(Ton)
8(6.5)
10(8.0)
12(9.5)
14(11.0)
16(12.5)
18(14.5)
20(16.0)
22(17.5)
24(19.0)
26(20.5)
28(22.5)
Product Charge(kg(lbs))
CF(kg(lbs))
8
(17.6)
8
(17.6)
8
(17.6)
8
(17.6)
8
(17.6)
16
(35.3)
16
(35.3)
16
(35.3)
16
(35.3)
16
(35.2)
16
(35.2)
-1
(-2.2)
0
(0)
1
(2.2)
2
(4.4)
3
(6.6)
-1
(-2.2)
0
(0)
1
(2.2)
2
(4.4)
3(6.6)
4(8.8)
HP(Ton)
30(24.0)
32(25.5)
34(27.0)
36(28.5)
38(30.0)
40(32.0)
42(33.5)
44(35.0)
46(36.5)
48(38.0)
Product Charge(kg(lbs))
CF(kg(lbs))
16
(35.2)
16
(35.2)
24
(52.8)
24
(52.8)
24
(52.8)
24
(52.8)
24
(52.8)
24
(52.8)
24
(52.8)
24
(52.8)
5(11.0)
6(13.2)
2(4.4)
3(6.6)
4(8.8)
5(11.0)
6(13.2)
7(15.4)
8(17.6)
9(19.8)
Refrigerant piping installation