Pipe Connections Between Indoor And Outdoor Unit; Preparation Work; Pipe Drawing Out During Single / Series Connection - LG MULTI V S ARUB060GSS4 Installation Manual

PIPE CONNECTIONS BETWEEN
INDOOR AND OUTDOOR UNIT
- Pipe connections can be done on the front side or on the side
according to the installation environments.
2
- Be sure to let 0.2 kgf/cm (0.284 lbs/in
when welding.
- If Nitrogen was not flown during welding, many oxidized membranes
may form inside the pipe and disturb the normal operations of valves
and condensers.
Refrigerant Pipe
Rear Side Pipe
Draw Out
Front Pipe
Right Side Pipe
Draw Out
Draw Out
Bottom Side Pipe
Draw Out

Preparation Work

- Use Knock Outs of Base Pan of the outdoor unit for Left/Right or
Bottom pipe drawing outs.
Removal Area for Liquid/Gas
pipe bottom side connections.
- Use the wet towel as shown in the below figure before welding
Wet towel
<Liquid pipe>
<High Pressure Gas pipe> <Low Pressure Gas pipe>
CAUTION
!
• Do not give damage to the pipe/base during the Knock Out
work.
• Proceed to pipe work after removing burr after Knock Out work.
• Perform sleeve work to prevent damage to the wire when
connecting wires using knock Outs.
Remove leakage prevention cap
• Remove the leakage prevention cap attached to the outdoor unit
service valve before pipe work.
• Proceed the leakage prevention cap removal as follows:
- Verify whether the liquid/gas pipes are locked.
- Extract remaining refrigerant or air inside using the service port.
- Remove the leakage prevention cap
2
) Nitrogen flow in the pipe
Regulator
Nitrogen Nitrogen Nitrogen
Direction Direction Direction
Taping
Valve
Nitrogen
High Pressure gas pipe
Leakage prevention cap

Pipe Drawing Out during Single / Series connection

Method of drawing out pipes on the front side and right side
- Proceed with the pipe work as shown in the below figure for front
side and right side pipe drawing out.
Pipe Knock Out for
Liquid/Gas pipes
Method of drawing out pipes on the rear side
- Proceed with the pipe work as shown in the below figure for rear
side pie drawing out.
Pipe Knock Out for Liquid/Gas pipes
※Pictures may differ depending on the model.
13
Refrigerant
Charging Port
Service Port
Low Pressure gas pipe
Liquid pipe