Pump Down - LG MW122C4 Installation Manual

PUMP DOWN

In case of appliance relocation and repair of the
refrigerant system, operate the pump down process
that brings the refrigerant from the indoor unit and
pipes it to the outdoor unit to avoid refrigerant loss.
• Operate the pump down process in the cooling
mode.
1
Remove the caps from the gas service valve,
the liquid service valve, and the core valves in
the outdoor unit.
2
Connect the low-pressure hose of the manifold
gauge to the core valve of the gas service valve.
3
Operate the appliance in the cooling mode.
• Operate the appliance more than 10 minutes
after checking whether the compressor of the
outdoor unit is operating properly.
4
Close the liquid service valve in the outdoor unit.
• Rotate the valve clockwise using a hexagon
wrench.
5
Close the gas service valve in the outdoor unit at
a pressure of 0.5 kgf/cm
• Rotate the valve clockwise using a hexagon
wrench.
6
Turn off the appliance.
NOTE
• Do not operate the appliance for a long time. It
may cause damage to the compressor.
20
Lo Hi
(7.1~14.2 psi).
2
7
Separate the low-pressure hose of the manifold
gauge and the pipe connected to the outdoor
unit.
• Use a torque wrench and adjustable wrench.
8
Close the caps from the gas service valve, the
liquid service valve, and the core valves.
• Tighten all the caps by using an adjustable
wrench and torque wrench.
NOTE
• Block the outdoor valve by screwing a flare nut
through the pipe after welding the end of the
separated pipe. This can protect the appliance
from air, vapor, and foreign substances.
WARNING
• Operating the appliance while it is disconnected
to the pipe could result in explosion and damage.
Use the appliance after connecting it to the pipe
once the appliance has been relocated and the
refrigerant circuit repaired.
EN