LG MULTI F Engineering Manual page 206

INSTALLATION & LAYOUT BEST PRACTICES
Refrigerant Piping System Layout
Multi F System Piping Connections
1. Align the center of the piping sections and tighten the flare nut by hand.
2. Tighten the flare nut with a torque wrench, using the arrows on the wrench as a guide, until a click is heard.
3. Wrap insulation around the connection.
Figure 286:Possible Outdoor Unit or Branch Distribution Unit to Indoor Unit Connections.
1. 3/8 in. to 3/8 in. Connection
Ø3/8 in.
Flare side to
branch distribution unit or ODU
3. 1/2 in. to 5/8 in.
Connection Flare nut
Ø1/2 in.
Flare
side pipe
from branch distribution unit or ODU
Torque
wrench
206 | DESIGN & PRACTICES
Flare side to indoor unit
Ø3/8 in.
Piping
Flare nut
Piping
Flare side to indoor unit
Ø5/8 in.
Connection socket
Spanner
Flare nut
Field Piping
Due to our policy of continuous product innovation, some specifications may change without notification.
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2. 3/8 in. to 1/2 in.
Flare nut
Connection
Connection socket
Ø3/8 in.
Flare
side to
branch distribution unit or ODU
4. 1/4 in. to 3/8
Flare nut
Connection
Connection socket
Ø1/4 in.
Flare
side to
branch distribution unit or ODU
F
MULTI
F
MULTI MAX
Piping
Flare side to indoor unit or
pipe to indoor unit
Ø1/2 in.
Piping
Flare side to indoor unit
Ø3/8 in.