LG ART COOL LAN090HSV5 Installation Manual page 30

INSTALLATION
Installing Field Piping to the Outdoor Unit Piping Connections
1. Verify the outdoor unit service ports are closed.
2. Remove the caps on the outdoor unit piping connections.
3. Connect the gas piping first to ROOM A, then to ROOM B, then to ROOM C, in that
order. Number of connections will differ depending on outdoor unit.
4. Tighten each gas piping connection individually following the "Tightening the Flare Nuts"
procedure below.
5. Connect the liquid piping first to ROOM A, then to ROOM B, then to ROOM C, in that
order. Number of connections will differ depending on outdoor unit.
6. Tighten each liquid piping connection individually following the "Tightening the Flare
Nuts" procedure earlier in this section.
Using the Connection Socket
Some indoor units require the use of a connection socket when piping the indoor units
to the outdoor unit. (See previous page for information.) The connection sockets are
included as a factory-supplied accessory with the indoor units. To install:
1. Align the center of the piping sections as seen in the diagrams at right and below.
2. Follow the "Tightening the Flare Nuts"procedure earlier in this section.
3. When all piping installation has been completed, perform the triple leak / pressure
and evacuation tests (see the Final Installation Procedures Section in the Multi F /
Multi F MAX Outdoor Unit or Multi F / Multi F MAX with LGRED Outdoor Unit Installa-
tion Manual), verify that the system does not have any leaks, and then fully insulate
all joints / connections.
Figure 35: Connection Socket Diagram, External View.
A
Connection Socket
30
B
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Figure 34: Close Up of the Field Piping to the
Outdoor Unit Piping Connection.
Figure 33: Connection Socket Installation.
Figure 36: Connection Socket Diagram, Internal View.
Flare
A
to
Outdoor
Unit
F
MULTI
F
MULTI MAX
Connection Socket Necessary
Only for 18, 24 kBtu/h Indoor
Units
Flare
B
to
Indoor
Unit