Refrigerant Piping - LG L5UC728FA0 Installation Manual

Installation of Indoor, Outdoor Unit

Refrigerant piping

Perform the work according to the Service Manual or Installation Guide.
• Use two spanners when connecting the
refrigerant pipe to the unit.
• Make a bend with a radius as large as
possible.
• Perform air purge with R22 or vacuum drying.
• When piping work is finished, check all joints.
n Add refrigerant if piping over 7.5m as shown
below, non distributor type.
n Add refrigerant if piping over 5m (main pipe),
7.5m (branch pipe) as shown below, distributor
type.
Table. Distributor type
24 kBtu/h
Main Pipe
48/60 kBtu/h
90 kBtu/h
12/18 kBtu/h
Branch Pipe
24/30/36 kBtu/h
48 kBtu/h
Table. Non Distributor type
12/18 kBtu/h
Branch Pipe 24/30/36 kBtu/h
48 kBtu/h
10 Multi Type Air Conditioner
Pipe
Gas Liquid
15.88 6.35
19.05 9.52
25.4 12.7
12.7 6.35
15.88 6.35
19.05 9.52
Pipe
Gas Liquid
12.7 6.35
15.88 6.35
19.05 9.52
Indoor
Factory charged
Outdoor
Additional
Refrigerant
30g/m
50g/m
120g/m
20g/m
30g/m
50g/m
Additional
Refrigerant
20g/m
30g/m
50g/m
Flared connection (Union)
Use a seemliness tube
Flared connection
(Service valve, Ball valve)