Multi F LMU540HV Installation Manual

Installation Manual 53
ENGLISH
Charging
ㅍ
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
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.
18k 50(164) 25(82) 3(9.8) 20(0.22) 15(49.2)
24k 75(246) 25(82) 3(9.8) 20(0.22) 22.5(74)
36k 75(246) 25(82) 3(9.8) 20(0.22) 30(98.4)
Outdoor Unit Ca-
pacity (Btu/h class)
Max total length of all
pipes (A+B)/(A+B+C)/
(A+B+C+D)
Max length of each
pipe (A/B/C/D)
Min length of each
pipe (A/B/C/D)
Additional Refrigerant
Unit : g/m (oz/ft)
Standard Total Piping
Length (No Add`l re-
frigerant)
Unit:m(ft)
Unit:m(ft)
Each branch pipe
a=82ft
b=16ft
c=49ft
Additional Charge
= {(82+16+49)-98.4} x 0.22 = 10.69 oz
A
a
b
c
9k
9k
9k
Ex) A4UW363FA2
Multiple Piping Models
Distributor Type Model
Outdoor Unit
Capacity
(Btu/h class)
Main Piping Length Branch Piping Length
Standard Length
Additional
Refrigerant
Unit : g/m (oz/ft)
Standard
Length
Additional
Refrigerant
Unit : g/m (oz/ft)
54k 5(16.4) 50(0.55) 5(16.4) 20(0.22)