LG AMNH096BTG0 Manuals page 82

Installation
2.2 Refrigerant charge
The calculation of the additional charge should be taken in account for the length of pipe.
A6UW406FA0 charge = 4100g
A
A7UW486FA0 charge = 7100g
A8UW566FA0 charge = 7100g
B Additional charge (g)
= Total Main pipe length - rated length
+
7,9,12 k Branch pipe length - rated length
+
18,24 k Branch pipe length - rated length
+
30,36 k Branch pipe length - rated length
- CF(Correction Factor) x 100
• Rated length = 5m,
• CF = Max. number of connectable indoor unit
Total Amount (g)
✽ Note : If total additional charge value after calculation comes out to be negative, then do not
consider additional charge.
2.3 Refrigerant charge
The calculation of the additional charge should be taken in account for the length of pipe.
ex) A6UW406FA0
A
A
B
Caution
Regulation for refrigerant leakage(in Europe)
: 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
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
x 50g/m
x 20g/m
x 30g/m
x 35g/m
– Total number of connected indoor unit
= A B
+
C
a b c
7k 9k 9k
d
18k
9k
A4UW306FA1 charge = 2500g
Additional charge (g)
=
Total Main pipe length - rated length
+ 7,9,12 k Branch pipe length - rated length
+
18,24 k Branch pipe length - rated length
• Total main pipe(A+B+C) = 30m
• Each branch pipe
a = 10m
b = 8m
c = 5m
d = 3m
e = 10m
• CF = 6-5 = 1
❖ Additional Charge
= (30-5) x 50
+ (10-5) x 20
+ (8-5) x 20
+ (5-5) x 20
+ (3-5) x 20
e
+ (10-5) x 30
- (1 x 100)
= 1250+100+60+0-40+150-100 =
- 82 -
x 40g/m
x 20g/m
x 30g/m
1420 g
0.3 ( kg / m 3 )
LGE Internal Use Only