Refrigerant Charge - LG Multi F A2UW14GFA0 Engineering Product Data Book

3. Installation of outdoor unit 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
A2UW14GFA0 [MU2M15 UL2]
A2UW16GFA0 [MU2M17 UL2]
A3UW18GFA0[MU3M19 UE2]
A3UW21GFA0[MU3U21 UE2]
A4UW24GFA0[MU4M25 U42]
A4UW27GFA0[MU4M27 U42]
A5UW30GFA0[MU5M30 U42]
A5UW40GFA0[MU5M40 U42]
n
(1Ø , 3Ø)
Additional charge (g) = (( Total Main piping Length - Main Standard Length (A) ) x a
+ (A Room Branch Length – Standard Length (B) ) x b
+ (B Room Branch Length – Standard Length (B) ) x b
+ (C Room Branch Length – Standard Length (B) ) x b +.. )
- CF(Correction Factor) x 100
h CF = Max. number of connectable indoor unit – Total number of connected indoor unit
Model
Standard Length, A (m)
A7UW40GFA0 [FM40AH U42]
A8UW48GFA0 [FM48AH U32]
A9UW56GFA0 [FM56AH U32]
Model
Standard Length, A (m)
A7UW42LFA0 [FM41AH U32]
A8UW48LFA0 [FM49AH U32]
A9UW56LFA0 [FM57AH U32]
NOTE
If the total additional charge value after calculation comes out to be negative, then do not consider additional charge.
Standard length, A (m)
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
Main piping length
Additional refrigerant, a (g/m)
5 50
5 50
5 50
Main piping length
Additional refrigerant, a (g/m)
5 50
5 50
5 50
Additional refrigerant, a (g/m)
20
20
20
20
20
20
20
20
Branch piping length
Standard Length, B (m) Additional refrigerant, b (g/m)
5
5
5
Branch piping length
Standard Length, B (m) Additional refrigerant, b (g/m)
5
5
5
Heat pump 50Hz/R410A
20
20
20
20
20
20
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