LG ARUB115BT2 Installation Manual - Page 35

The Amount of Refrigerant

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ENGLISH Refrigerant piping installation N 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 8 (17.6) 2 (4.4) 16(12.5) 18(14.5) 20(16.0) 22(17.5) 24(19.0) 8 (17.6) 16 (35.3) 16 (35.3) 16 (35.3) 16 (35.3) 3 -1 0 1 2 (6.6) (-2.2) (0) (2.2) (4.4) WARNING Regulation for refrigerant leakage : the amount of refrigerant leakage should satisfy the following equation for human safety. Total amount of refrigerant in the system Volume of the room at which indoor unit of the least capacity is installed 0.44kg / m3(0.028(lbs/ft3.)) ❐ If the above equation can not be satisfied, then follow the following steps. - Selection of air conditioning system: select one of the next 1. Installation of effective opening part 2. Reconfirmation of outdoor unit capacity and piping length 3. Reduction of the amount of refrigerant 4. Installation of 2 or more security device (alarm for gas leakage) - Change indoor unit type : installation position should be over 2m(6.6ft) from the floor (wall mounted type ¡ cassette type) - Adoption of ventilation system : choose ordinary ventilation system or building ventilation system - Limitation in piping work : Prepare for earthquake and thermal stress WARNING Refer to model information since the CF value of correction factor differs depending on model. Installation Manual 35

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Installation Manual
35
ENGLISH
Refrigerant piping installation
◆
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)):
Ø
22.2mm(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)):
Ø
19.05mm(3/4inch)
Total liquid pipe (m(ft)):
Ø
15.88mm(5/8inch)
Total liquid pipe (m(ft)):
Ø
12.7mm(1/2inch)
Total liquid pipe (m(ft)):
Ø
9.52mm(3/8inch)
Total liquid pipe (m(ft)):
Ø
6.35mm(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:
Ø
12.7(1/2), 50m(164ft)
B:
Ø
9.52(3/8), 10m(33ft)
C:
Ø
9.52(3/8), 10m(33ft)
D:
Ø
9.52(3/8),10m(33ft)
E:
Ø
6.35(1/4), 10m(33ft)
HP(Ton)
8(6.5)
10(8.0)
12(9.5)
14
16(12.5)
18(14.5)
20(16.0)
22(17.5)
24(19.0)
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)
-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)
WARNING
Regulation for refrigerant leakage
: the amount of refrigerant
leakage should satisfy the following equation for human safety.
❐
If the above equation can not be satisfied, then follow the following steps.
- Selection of air conditioning system: select one of the next
1. Installation of effective opening part
2. Reconfirmation of outdoor unit capacity and piping length
3. Reduction of the amount of refrigerant
4. Installation of 2 or more security device (alarm for gas leakage)
- Change indoor unit type
: installation position should be over 2m(6.6ft) from the floor (wall mounted type
→
cassette type)
- Adoption of ventilation system
: choose ordinary ventilation system or building ventilation system
- Limitation in piping work
: Prepare for earthquake and thermal stress
WARNING
Refer to model information since the CF value of correction factor differs depending on model.
Total amount of refrigerant
in the system
0.44kg / m
3
(0.028(lbs/ft
3
.))
Volume of the room at which indoor unit
of the least capacity is installed