LG Multi V CRUN Series

28 Outdoor Unit
Refrigerant piping installation
◆ The Amount of Refrigerant
The calculation of the additional charge should take account of the length of pipe.
Regulation for refrigerant leakage(in Europe)
: 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. Effective opening part Installation
2. Reconfirmation of outdoor unit capacity and piping length
3. Reduction of the amount of refrigerant
4. 2 or more security device installation of alarm for gas leakage
- Change indoor unit type
: installation position should be over 2m from the floor (Wall mounted type → Cassette type)
- Adoption of ventilation system
: choose ordinary ventilation system or building ventilation system
- Limitation in piping work
: design for earthquake-proof and prevention against thermal stress
Total amount of refrigerant in the system
0.3 ( kg / m
3
)
Volume of the room at which indoor unit of the least capacity is installed
Additional charge (kg)
CRUN1008T0 charge = 10.0kg
CRUN458S0 charge = 3.5kg
=
x
x
x
x
+
+
+
+=
+
Total liquid pipe (m): Ø15.88mm
0.2(kg/m)
0.12(kg/m)
0.06(kg/m)
0.025(kg/m)
CRUN458S0 : CF = 1.0
CRUN1008T0 : CF = 4.9
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)
A
A B
B
B
A
B B
BB
A
B
C
X
b
a
c d
34 5
21
e
Outdoor Unit(CRUN1008T0)
Indoor Unit
A: ø15.88, 60m
B: ø9.52, 20m
C: ø12.7, 20m
Additional Charge = A x 0.2 + B x 0.06 + C x 0.12
+ (a+b+c+d+e) x 0.025 + CF
= 60 x 0.2 + 20 x 0.06 + 20 x 0.12
+ (10 x 5) x 0.025 + 4.9
= 21.75 (kg)
a: ø6.35, 10m
b: ø6.35, 10m
c: ø6.35, 10m
d: ø6.35, 10m
e: ø6.35, 10m
WARNING