LG A3UW186FA3, Installation Manual

Page: 9 / 37

Installation of Indoor, Outdoor Unit
Installation Manual 9
ENGLISH
Refrigerant charge
The calculation of the additional charge should be taken in account for the length of extra pipe.
• Total main pipe(A+B+C) = 30m
• Each branch pipe
a = 10m
b = 8m
c = 5m
d = 3m
e = 10m
❖
Additional Charge
=((30-5) x 50 + (10-5) x 20 + (8-5) x 20
+ (5-5) x 20 + (3-5) x 20 + (10-5) x 20)
- (7-5) x 100 = 1270g
A
Ex) A7UW406FA3
A
B
C
a b c
7k 9k 9k
d
e
9k
18k
■
Multiple Piping Models
■
Distributor type Models
Additional charge (g) = ((A Room Installation Length – Standard Length ) x 20g/m
+ (B Room Installation Length – Standard Length ) x 20g/m +.. )
- CF(Correction Factor) x 150
❈
CF = Max. number of connectable indoor unit – Total number of connected indoor unit
Additional charge (g) = (( Total Main piping Length - Main Standard Length ) x 50g/m
+ (A Room Branch Length – Standard Length ) x 20g/m
+ (B Room Branch Length – Standard Length ) x 20g/m
+ (C Room Branch Length – Standard Length ) x 20g/m +.. )
- CF(Correction Factor) x 100
❈
CF = Max. number of connectable indoor unit – Total number of connected indoor unit
Additional Charge Calculation Example-1
Model
Standard
length(m)
Max piping for
one room(m)
Max total Piping
Length(m)
Additional
Charge(g/m)
A3UW186FA3[FM19AH] 7.5 25 40 20
A3UW216FA3/4[FM21AH] 7.5 25 50 20
A4UW246FA3/4[FM25AH] 7.5 25 70 20
A4UW276FA3[FM27AH] 7.5 25 70 20
A5UW306FA3[FM30AH] 7.5 25 75 20
A5UW406FA3[FM38AH] 7.5 25 85 20
Multiple Piping Models
Model Phase
Main Piping length Branch piping length
Standard
length(m)
Additional
refrigerant(g/m)
Standard
length(m)
Additional
refrigerant(g/m)
A7UW406FA2/3[FM40AH] 5 50 5 20
1Ø A8UW486FA3[FM48AH] 5 50 5 20
A9UW566FA3[FM56AH] 5 50 5 20
A7UW428FA3[FM41AH] 5 50 5 20
3Ø A8UW488FA3[FM49AH] 5 50 5 20
A9UW548FA3[FM57AH] 5 50 5 20
Distributor type Models