Charging - LG MULTI F Installation Manual
Multi-zone heat pump systems
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Also See for MULTI F:
- Engineering manual (224 pages) ,
- Installation manual (65 pages) ,
- Install (9 pages)
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Charging
n If installed total piping length is more than standard total length, additional refrigerant charging is
necessary.
Below standard total piping length, additional refrigerant charging is not required.
Multiple Piping Models
Max total length of all
Outdoor Unit Ca-
pipes (A+B)/(A+B+C)/
pacity (Btu/h class)
(A+B+C+D)
18k
50(164)
24k
75(246)
36k
75(246)
Distributor Type Model
Outdoor Unit
Capacity
(Btu/h class)
54k
Important:
If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge using
the charge amount specified on the Unit`s specification label.
Multiple Piping Models
Additional charge(oz ) = (Total Installation Piping Length-Standard Total Piping Length) x 0.22
EX) A3UW24GFA0
Max length of each
pipe (A/B/C/D)
25(82)
25(82)
25(82)
Main Piping Length
Standard Length
Unit : g/m (oz/ft)
5(16.4)
a
b
c
Min length of each
pipe (A/B/C/D)
3(9.8)
3(9.8)
3(9.8)
Additional
Standard
Refrigerant
50(0.55)
5(16.4)
Each branch pipe
9k
a=82ft
b=16ft
c=49ft
9k
Additional Charge
= {(82+16+49)-98.4} x 0.22 = 10.69 oz
9k
Standard Total Piping
Additional Refrigerant
Length (No Add`l re-
Unit : g/m (oz/ft)
20(0.22)
15(49.2)
20(0.22)
22.5(74)
20(0.22)
30(98.4)
Branch Piping Length
Additional
Refrigerant
Length
Unit : g/m (oz/ft)
20(0.22)
Installation Manual 43
Charging
Unit:m(ft)
frigerant)
Unit:m(ft)
- Quick Links:
- Refrigerant Charge
- Error Codes
- Troubleshooting
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