LG Multi F A2UW14GFA0 Engineering Product Data Book page 305

2. Guideline for each installation process
2.2.3 Pipe connection flaring
NOTE
1. After installation completion make sure to open the
valve. operating the unit with the valve shut off will
destroy the compressor (Refer to the additional
refrigerant charge detail information)
2. Use R410A to add refrigerant. All field piping must be
installed by a licensed refrigeration technician
3. Must comply with local and national standard
regulations.
1) Connecting the piping to the indoor unit
and drain hose to drain pipe
① Align the center of the piping and sufficiently tighten the
flare nut by hand.
② Tighten the flare nut with a wrench. Wrap the insulation
material around the connecting portion.
2) Wrap the insulation material around the
connecting portion.
① Overlap the connection pipe insulation material and the
indoor unit pipe insulation material. Bind them together
with vinyl tape so that there is no gap.
② Wrap the area which accommodates the rear piping
housing section with vinyl tape.
③ When the piping is passed through a tray, duct work or a
sleeve the insulation wrapping on the pipe is not
required.
3) Close up a socket out of use with a brass cap.
① Align the center of the piping and sufficiently tighten the
brass cap by hand.
② Tighten the brass cap with a wrench.
③ Wrap the area contacted with insulation.
CAUTION
Over tightening of the flare nuts in the pipes
may cause nuts to crack or the refrigerant to leak.
CAUTION
Improper piping and flaring can lead to the leakage of
refrigerant
NOTE
For flaring work of the piping, follow the instructions in
the installation manual to each unit.
Indoor unit tubing Flare nut
Wrench
Indoor unit tubing
Connection pipe
Wrap with vinyl tape
Vinyl tape (wide)
Connecting cable
Vinyl tape(narrow)
CAUTION
Never use the plastic cap during closing.
Heat pump 50Hz/R410A
Pipes
Open-end wrench (fixed)
Flare nut
Connection pipe
Indoor unit pipe
Pipe
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