Refrigerant Charge - LG MULTI F A2UW16GFA0 Engineering Product Data Book

3. Installation of outdoor unit

3.8.2 Refrigerant charge

The calculation of the additional charge should be taken into account for the additional length of pipe.
n
(1Ø)
Additional charge (g) = ((A Room Installation Length – Standard Length (A) ) x a
+ (B Room Installation Length – Standard Length (A) ) x a +.. )
- CF(Correction Factor) x 150
h CF = Max. number of connectable indoor unit – Total number of connected indoor unit
Model
A2UW16GFA0
A3UW21GFA0
A5UW30GFA0
A5UW40GFA0
Additional refrigerant charge calculation example - 1
Ex) A5UW30GFA0[MU5M30 U42]
Standard length, A (m)
7.5
7.5
7.5
7.5
7k
a
• Each branch pipe
a = 5m
b = 10m
b 7k
c = 15m
d = 25m
9k
c
❖ Additional Charge
d 12k
= (5-7.5) x 20
+ (10-7.5) x 20
+ (15-7.5) x 20
+ (25-7.5) x 20
– (5-4) x 150
= 0+50+150+350-150 = 400g
Additional refrigerant, a (g/m)
20
20
20
20
Heat pump
60Hz/R410A
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