LG LCN097HV4 Installation Manual page 34

PIPING CONNECTIONS
IDU to ODU
Multi F Outdoor Unit to Indoor Unit Piping Connections, continued.
Connection sockets (included as a factory-supplied accessory with the in-
door units) may need to be used when piping the indoor units to the outdoor
unit.
Table 27: Connection Socket Dimensions.
Vapor (in., OD)
Indoor Unit
Capacity
A
18,000 Btu/h Ø3/8 → Ø1/2
Using the Connection Socket
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.
Multi F MAX Outdoor Unit System Piping Connections
Note:
Avoid Pipe Damage
• When routing field-provided piping, avoid damaging the outdoor unit from excessive vibration.
• Properly insulate the liquid and gas lines separately up to the point of connection at the unit frame.
• See table below for Multi F MAX outdoor unit connection types.
Correctly route the piping so it does not make contact with
mounting bolts. Allow room for field installation.
Branch Distribution to Indoor Unit Piping Connections
• Install indoor unit liquid and vapor refrigerant pipes (and connection wiring) to the appropriate branch distribution ports.
• Clearly note on the indoor unit's refrigerant piping (liquid, vapor) which branch distribution port it is connected to (A, B, C, D).
Table 29: Branch Distribution Unit Piping Connections.
Branch Distribution
PMBD3620
Unit
Piping Connections to Outdoor Unit
Liquid (in., OD) x Qty.
Vapor (in., OD) x Qty.
Piping Connections to Indoor Units
Liquid (in., OD) x Qty. Ø1/4 x 2
Vapor (in., OD) x Qty. Ø3/8 x 2
34
Liquid (in., OD)
B A B
N/A
PMBD3630 PMBD3640
Ø3/8 x 1
Ø3/4 x 1
Ø1/4 x 3 Ø1/4 x 4 Ø1/4 x 3, Ø3/8 x 1
Ø3/8 x 3 Ø3/8 x 4 Ø3/8 x 3, Ø5/8 x 1
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Figure 42: Connection Socket Diagram.
Flare
A
to
Outdoor
Unit
Figure 43: Performing Connections.
Connection Socket
(Factory-supplied with
Table 28: Outdoor Unit Piping Connections.
Outdoor Unit Piping Connections
Liquid Line Connection (in., OD) x Qty.
Vapor Line Connection (in., OD) x Qty.
PMBD3641
Figure 44: Branch Distribution Ports to Indoor Units.
A
F
MULTI
F
MULTI
the indoor unit)
LMU480HV, LMU540HV,
and LMU600HV
3/8 x 1
3/4 x 1
B C D
MAX
B
Flare
to
Indoor
Unit