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Installation of Indoor, Outdoor Unit
Refrigerant charge
The calculation of the additional charge should be taken in account for the length of extra pipe.
Model
Standard length(m)
A6UW368FA0
A7UW428FA0
A8UW488FA0
A9UW548FA0
Additional charge(g) = Main piping additional refrigerant + Branch piping additional refrigerant
Main piping additional refrigerant = (Total main piping length - standard length) x Additional refrigerant
Branch piping additional refrigerant = (Total branch piping length - standard length) x Additional refrigerant
✽ Note : If additional charge value after calculation comes out to be negative, then do not
consider additional charge.
Additional Charge Caculcation Example-1
ex) A7UW428FA0
A
A
B
8 Room Air Conditioner
Main piping length
Additional refrigerant(g/m)
5
10
10
10
C
a
b
7k
9k
d
9k
Standard length(m)
40
50
50
50
• Total main pipe(A+B+C) = 30m
• Each branch pipe
a = 10m
b = 8m
c = 5m
d = 3m
e = 10m
c
❖ Additional Charge
9k
= (30-10) x 50
+ ((10+8+5+3+10)-35) x 25
= 1000 + 25 = 1025g
e
18k
Branch piping length
Additional refrigerant(g/m)
30
35
40
7k/9k/12k/18k/24k : 25
45
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