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10. Installation Instruction
• IMPORTANT (only for S18NKUA)
This product has been designed and manufactured to meet ENERGY STAR® criteria for energy efficiency when
matched with appropriate coil components. However, proper refrigerant charge and proper air flow are critical to
archive rated capacity and efficiency. Installation of this product should follow the manufacturer’s refrigerant
charging and air flow instructions. Failure to confirm proper charge and airflow may reduce energy
efficiency and shorten equipment life.
10.1.1 Select the Best Location
10.1.1.1 Indoor Unit
• Do not install the unit in excessive oil fume areas
such as kitchens, workshops etc.
• There should not be any heat source or steam
near the unit.
• There should not be any obstacles blocking the air
circulation.
• A place where air circulation in the room is good.
• A place where drainage can be easily done.
• A place where noise prevention is taken into
consideration.
• Do not install the unit near a doorway.
• Ensure the spaces indicated by arrows from the
wall, ceiling, fence or other obstacles.
• Recommended installation height for indoor unit
shall be at least 8.2 ft.
10.1.1.2 Outdoor Unit
• If an awning is built over the unit to prevent direct
sunlight or rain, be careful that heat radiation from
the condenser is not obstructed.
• There should not be any animal or plant which
could be affected by hot air discharged.
• Keep the spaces indicated by arrows from wall,
ceiling, fence or other obstacles.
• Do not place any obstacles which may cause a
short circuit of the discharged air.
• If piping length is over the [piping length for
additional gas], additional refrigerant should be
added as shown in the table.
• Recommended installation height for outdoor unit
should be above the seasonal snow level.
Example: For S18NKUA
If the unit is installed at 41 ft distance, the quantity of
additional refrigerant should be 2.46 oz .... (41 - 32.8)
ft × 0.3 oz/ft = 2.46 oz.
10.1.2 Indoor/Outdoor Unit Installation
Diagram