Pipe Connections Between Indoor And Outdoor Unit - LG Multi V ARUN***LM3 Series 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.
• Be sure to let 0.2kgf/cm 2
• If Nitrogen was not flown during welding, many oxidized membranes may form inside the pipe and disturb the
normal operations of valves and condensers.
Left Side Pipe Draw Out
Front Side Pipe Draw Out
Preparation Work
• Use Knock Outs of Base Pan of the outdoor unit for Left/Right or Bottom pipe drawing outs.
n 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:
1. Verify whether the liquid/gas/common pipes are locked.
2. Extract remaining refrigerant or air inside using the
service port.
3. Remove the leakage prevention cap
Pipe connections between indoor and outdoor unit
Nitrogen flow in the pipe when welding.
Right Side Pipe Draw Out
Remove Area for Liquid/ Gas pipe
Bottom side connections
Refrigerant Pipe
Nitrogen
Direction
Taping
Service port
Liquid Pipe
Gas Pipe
Leakage prevention cap
Installation Manual 21
Regulator
Valve
Nitrogen