LG 100K Installation Manual page 11

Refrigerant piping connections (FLARE connections)
To avoid alteration of unit capacities, check that piping lengths and changes in elevation are kept
to a strict minimum.
Before connecting the refrigerant lines, follow the procedures below (if precharged connection
lines are not supplied):
- Select copper pipe diameters according to the size of unit to be installed.
- Install the refrigeration lines, checking that no foreign bodies get inside the piping.
- Install the flare connectors and flare the ends of the pipes.
- Evacuate the piping. This operation, which should last at least 15 minutes or even longer if there
are large piping lengths and changes in elevation, should be followed by a leak test.
- To this effect, when the piping has been evacuated, close the pressure gauge tap, note the
value on the gauge, then wait for 15 minutes. If the needle moves, there is a leak in the system.
Make the neccessary adjustments or repairs and repeat this procedure until the needle no
longer moves.
- Open the service valves and top up the refrigerant charge if necessary.
INDOOR UNIT
FLARE JOINT
INDOOR UNIT
FLARE JOINT
FLARE VALVE
OUTDOOR UNIT
DISCHAGE
SUCTION
FLARE VALVE
OUTDOOR UNIT
DISCHAGE
SUCTION
INSTALLATION OF UNIT
CHARGE SET
VACUMM PUMP
CHARGE SET
CHARGE
CYLINDER
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