LG ATNH126ELFB Service Manual page 23

Installation
Refrigerant Additional Charging Method
1. AUUH488B/AUUW4860/AUUW6060
There is not additional charging of refrigerant by main pipe of 30m below.
For additional charging method, see below table.
Synchro Refrigerant Additional charging (kg)
Duo Refrigerant = (L1-30) x A + (L2+L3-20) x 0.03
Trio
Refrigerant = (L1-30) x A + (L2+L3+L4-20) x 0.03
Refrigerant = (L1-30) x A + (L2+L3+L4+L5-20) x 0.03
Quartet
(L1=Main Pipe, L2~L5 : Branch Pipe)
❈ Note: If total additional charge value after calculation comes out to be negative, then do not consider additional
charge.
CAUTION:
• Rated performance for refrigerant line length of:7.5m
• Capacity is based on standard length and maximum allowance length is on the basis of
reliability.
• Improper refrigerant charge may result in abnormal cycle.
• Oil trap should be installed every 10 meters.
2. AUUH7280/AUUH10080
For additional charging method, see below table.
Synchro Refrigerant Additional charging (kg)
Duo Refrigerant = (L1 - 5) x 0.05 + (L2 + L3 - 20) x A
Trio
Refrigerant = (L1 - 5) x 0.05 + (L2 + L3 + L4 - 20) x A
Refrigerant = (L1 - 5) x 0.05 + (L2 + L3 + L4 + L5 - 20) x A
Quartet
(L1=Main Pipe, L2~L5 : Branch Pipe)
❈ Note: If total additional charge value after calculation comes out to be negative, then do not consider additional
charge.
CAUTION:
• Rated performance for refrigerant line length of:7.5m
• Capacity is based on standard length and maximum allowance length is on the basis of
reliability.
• Improper refrigerant charge may result in abnormal cycle.
• Oil trap should be installed every 10 meters.
56 Synchro Air Conditioner
Model
AUUH488B
AUUW4860/AUUW6060
Refrigerant Branch
A
Pipe (mm)
Ø 6.35 0.03 kg/m
Ø 9.52 0.05 kg/m
A
0.07
0.05