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Preference Sheet
7-6 Samsung Electronics
7-6 "Pump down" Procedure
Pump down will be carried out when an evaporator is replaced or when the unit is relocated in another area.
Pump-down is an operation intended to collect all the system refrigerant in the outdoor unit.
This operation must be carried out before disconnecting the refrigerant pipe in order to avoid refrigerant loss to the
atmosphere.
1. Turn the system on in cooling with fan operating at high velocity and then let the compressor run for more than 5 minutes.
(Compressor will immediately start, provided 3 minutes have elapsed since the last stop.)
2. Release the valve caps on High and Low pressure side.
3. Use L-wrench to close the valve on the high pressure side.
4. After approximately 2 minute, close the valve on the low 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.
A(Liquid)
B(Gas)
※ The design and shape can be changed according to the model.
Relocation of the air conditioner.
• Refer to this procedure when the unit is relocated.
1. Carry out the pump down procedure (refer to the details of ‘pump down’).
2. Remove the power cord.
3. Disconnect the assembly cable from the indoor and outdoor units.
4. Remove the flare nut connecting the indoor unit and the pipe. At this time, cover the pipe of the indoor unit and the
other pipe using a cap or vinyl plug to avoid foreign material entering.
5. Disconnect the pipe connected to the outdoor unit.
4. At this time, cover the valve of the outdoor unit and the other pipe using a cap or vinyl plug to avoid foreign material entering.
6. Make sure you do not bend the connection pipes in the middle and store together with the cables.
7. Move the indoor and outdoor units to a new location.
8. Remove the mountin g plate for the indoor unit and move it to a new location.
Remarks
• After installing the product, be sure to perform leak tests on the piping connections. After pumping down refrigerant
to inspect or relocate the outdoor unit, be sure to stop the compressor and then remove the connected pipes.
- Do not operate the compressor while a valve is open due to refrigerant leakage from a pipe or an unconnected or
incorrectly connected pipe. Failure to do so may cause air to flow into the compressor and too a high pressure to
develop inside the refrigerant circuit, leading to an explosion or product malfunction.
WARNING