LG Electronics MFL39817303 installation manual Pump Down Procedure

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Installation

NOTICE

If the actual pressure is higher than shown, the system is most likely over-charged, and charge should be removed. If the actual pressure are lower than shown, the system is most likely undercharged, and charge should be added.

PUMP DOWN

This is performed when the unit is relocated or the refrigerant circuit is serviced.

Pump Down means collecting all refrigerant into the outdoor unit without the loss of refrigerant.

Be sure to perform Pump Down procedure in the cooling mode.

Pump Down Procedure

1.Connect a low-pressure gauge manifold hose to the charge port on the gas side service valve.

2.Open the gas side service valve halfway and purge the air in the manifold hose using the refrigerant.

3.Close the liquid side service valve(all the way).

4.Turn on the unit's operating switch and start the cooling operation.

5.When the low-pressure gauge reading becomes 1 to 0.5kg/cm2 G(14.2 to 7.1 P.S.I.G.), fully close the gas side valve and then quickly turn off the unit. Now Pump Down procedure is completed, and all refrigerant is collected into the outdoor unit.

28Room Air Conditioner

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Contents Room Air Conditioner Table of Contents Installation Instructions Be sure not to do Be sure to follow the instruction No installation may cause a fire and electrical shockIt may cause injury or an accident Operation Otherwise, it may cause water leakage Otherwise, it may cause dispute with the neighborsOtherwise, it may cause vibration or water leakage Otherwise, it may do harm to your healthSymbols used in this Manual FeaturesInstallation Tools Installation PartsRead carefully, and then follow step by step Installation Map Indoor unit Select the best LocationOutdoor unit Piping Length and Elevation Drill a Hole in the Wall Fixing Installation PlateType Flaring Work Cutting TubesBurrs removal Putting nut onConnecting the Piping CheckIndoor Foamed polyethylene or equivalent is recommendedIndoor unit installation Lbf .ftFor left rear piping Piping for passage through piping hole Good case Bad caseConnecting the Cables How to use the front panelOutdoor Move the link upward and close the front panelFront panel removing Refix the cover control to the original position Connect the wires to the terminals onWith the screw For strand wiring How to connect wiring to the terminalsConnecting cable Checking the Drainage To check the drainageDrain piping Pour a glass of water on the evaporatorForming the Piping Air purging Air PurgingAir purging with vacuum pump Soap water method EvacuationFinishing the job If bubbles come out, the pipes have leakagePrepare remote controller Test RunningSettlement of outdoor unit Evaluation of the performancePump Down Procedure Pump DownInstallation guide at the seaside Selecting the locationOutdoor UnitMemo Room Air Conditioner No. MFL39817303