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.1 Preparations and precautions
Air and foreign matter in the refrigerant circuit can cause abnormal rises in pressure, which can
damage the air conditioner, reduce its efficiency, and cause injury. Use a vacuum pump and manifold
gauge to evacuate the refrigerant circuit, removing any non-condensable gas and moisture from the
system.
Evacuation should be performed upon initial installation and when unit is relocated.
Before performing evacuation
•
Check to make sure that both highpressure and low-pressure pipes between the indoor and outdoor
units are connected properly in accordance with the Refrigerant Piping Connection section of this
manual.
•
Check to make sure all wiring is connected properly.
4
.2 Evacuation instructions
Before using the manifold gauge and vacuum pump, read their operation manuals to familiarize
yourself with how to use them properly.
4.
Air evacuation
63 / 120 EN
Split-type room air conditioner / Installation Manual