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Pump down Procedure
Pump down will be carried out when an evaporator is replaced or when the unit is relocated in another area.
• After installing the product, be sure to perform leak tests on the piping connections. Before 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
1. Let the compressor run for more than 5 minutes.
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. Cut the power at the circuit breaker, and then disconnect the pipes.
B(liquid)
A(gas)
A : Low pressure side
B : High pressure side
Relocation of the air conditioner
• Refer to this procedure when the unit is relocated.
• Carry out the pump down procedure (refer to the details of ‘pump down’).
• Remove the power cord.
• Disconnect the assembly cable from the indoor and outdoor units.
• 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.
• Disconnect the pipe connected to the outdoor unit. 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.
• Make sure you do not bend the connection pipes in the middle and store together with the cables.
• Move the indoor and outdoor units to a new location.
• Remove the mounting plate for the indoor unit and move it to a new location.
NOTE
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