Haier 3U70S2SR3FA Bedienungshandbuch Seite 28

5. Refilling the refrigerant
Precautions when adding R32
Fill from the liquid pipe in liquid form.(recommend)
6. Charging with refrigerant
7.Precautions for Laying Refrigerant Piping
Cautions on pipe handling
Selection of copper and heat insulation materials
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