Samsung AC777MXAD7H series Installation Manual

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Samsung AC777MXAD7H series Installation Manual Manual pdf 28 page image

28Extra ProceduresEnglishExtra ProceduresExtra ProceduresPumping down refrigerantCAUTION• After installing the product, be sure to perform leaktests on the piping connections. After pumping downrefrigerant to inspect or relocate the outdoor unit,be sure to stop the compressor and then remove theconnected pipes.– Do not operate the compressor while a valve isopen due to refrigerant leakage from a pipe or anunconnected or incorrectly connected pipe. Failureto do so may cause air to flow into the compressorand too a high pressure to develop inside therefrigerant circuit, leading to an explosion orproduct malfunction.Pump-down is an operation intended to collect all thesystem refrigerant in the outdoor unit. This operationmust be carried out before disconnecting the refrigerantpipe in order to avoid refrigerant loss to the atmosphere.1 Pump-down is an operation intended to collect allthe system refrigerant in the outdoor unit. Thisoperation must be carried out before disconnectingthe refrigerant pipe in order to avoid refrigerant lossto the atmosphere.2 Release the valve caps on High and Low pressureside.3 Use L-wrench to close the valve on the high pressureside.4 After approximately 2 minute, close the valve on thelow pressure side.5 Stop operation of the air conditioner by pressing the(Power) button on the indoor unit or remote control.6 Disconnect the pipes.B(liquid) A(Gas)Relocating the indoor and outdoorunits1 Pump down refrigerant. See Pumping downrefrigerant on page 28.2 Remove the power cord.3 Disconnect the assembly cable from the indoor andoutdoor units.4 Remove the flare nuts connecting the indoor unitsand the pipes. At this time, cover the pipes of theindoor unit and the other pipes using a cap or vinylplug to avoid foreign material entering.5 Disconnect the pipes connected to the outdoor units.At this time, cover the valve of the outdoor units andthe other pipes using a cap or vinyl plug to avoidforeign material entering.Note: Make sure you do not bend the connectionpipes in the middle and store together with thecables.6 Move the indoor and outdoor units to a new location.7 Remove the mounting plate for the indoor unit andmove it to a new location.