iii
• Do not supply power to the unit until all wiring and tubing are completed or reconnected
and checked.
• Highly dangerous electrical voltages are used in this system. Carefully refer to
the wiring diagram and these instructions when wiring. Improper connections and
inadequate grounding can cause accidental injury or death.
• Connect all wiring tightly. Loose wiring may cause overheating at connection points and
a possible fire hazard.
• Provide a power outlet to be used exclusively for each unit.
• ELCB must be incorporated in the fixed wiring. Circuit breaker must be incorporated in
the fixed wiring in accordance with the wiring regulations.
U-8LZ2E8 U-10LZ2E8
Circuit breaker
25 A 30 A
• Provide a power outlet exclusively for each unit, and full disconnection means having
a contact separation by 3 mm in all poles must be incorporated in the fixed wiring in
accordance with the wiring rules.
• To prevent possible hazards from insulation failure, the unit must be grounded.
• Check that cabling will not be subject to wear, corrosion, excessive pressure,
vibration, sharp edges or any other adverse environmental effects.
The check shall also take into account the effects of aging or continual vibration from
sources such as compressors or fans.
• This equipment is strongly recommended to be installed with Earth Leakage Circuit
Breaker (ELCB) or Residual Current Device (RCD). Otherwise, it may cause electrical
shock and fire in case of equipment breakdown or insulation breakdown.
When Transporting
• It may need two or more people to carry out the installation work.
• Be careful when picking up and moving the indoor and outdoor units. Get a partner to
help, and bend your knees when lifting to reduce strain on your back. Sharp edges or
thin aluminum fins on the air conditioner can cut your fingers.
When Storing…
WARNING
• The appliance shall be stored in a well-ventilated area where the room size
corresponds to the room area as specified for operation.
• The appliance shall be stored in a room without continuously operating open
flames (for example: an operating gas appliance) and ignition sources (for
example: an operating electric heater).
• The appliance shall be stored so as to prevent mechanical damage from occurring.
When Installing…
• Select an installation location which is rigid and strong enough to support or hold the
unit, and select a location for easy maintenance.
• In cases that require mechanical ventilation, ventilation openings shall be kept clear of
obstruction.
• An unventilated area where the appliance using flammable refrigerants is installed shall
be so constructed that should any refrigerant leak, it will not stagnate so as to create a
fire or explosion hazard.
00_330344_2WAY_Eng.indb 3 2020/12/21 11:26:33
…In a Room
Properly insulate any tubing run inside a room to prevent “sweating” that can cause
dripping and water damage to walls and floors.
WARNING
• If the air conditioner is installed in a small room, take measures to prevent the
refrigerant concentration from exceeding the safety limit in the event of refrigerant
leakage.
Consult the sales dealer regarding the appropriate measures to prevent the
allowable concentration from being exceeded.
If the refrigerant comes in contact with a flame, it produces a toxic gas and a fire.
If the refrigerant leaks and the allowable concentration is exceeded, hazards due
to a lack of oxygen in the room will result.
• When air flow decrease is detected of a circulation fan beside the indoor unit
installed, the system must be powered off within 10 seconds from the detection.
CAUTION
Keep the fire alarm and the air outlet at least 1.5 m away from the unit.
…In Moist or Uneven Locations
Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the
outdoor unit. This prevents water damage and abnormal vibration.
…In an Area with High Winds
Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable
air baffle.
…In a Snowy Area (for Heat Pump-type Systems)
Install the outdoor unit on a raised platform that is higher than drifting snow. Provide
snow vents.
When Connecting Refrigerant Tubing
Pay particular attention to refrigerant leakages.
WARNING
•
When performing piping work, do not mix air except for specified refrigerant in
refrigeration cycle. It causes capacity down, and risk of explosion and injury due to
high tension inside the refrigerant cycle.
• If the refrigerant comes in contact with a flame, it produces a toxic gas and a fire.
• Do not add or replace refrigerant other than specified type. It may cause product
damage, burst and injury, etc.
• Ventilate the room immediately in the event of a refrigerant gas leakage during
installation. Be careful not to allow contact of the refrigerant gas with a flame as this will
cause the generation of toxic gas and fire.
• Keep all tubing runs as short as possible.
• Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before
connecting them, then tighten the nut with a torque wrench for a leak-free connection.
• Check carefully for leaks before starting the test run.
• Do not leak refrigerant while piping work for an installation or re-installation, and while
repairing refrigeration parts.
Handle liquid refrigerant carefully as it may cause frostbite.
• Under no circumstances shall potential sources of ignition be used in the searching or
detection of refrigerant leaks.
00_330344_2WAY_Eng.indb 4 2020/12/21 11:26:33
SM830289-01_欧州向け R32 mini VRF 8,10HP SM&TRSM.indb 3SM830289-01_欧州向け R32 mini VRF 8,10HP SM&TRSM.indb 3 2021/05/07 10:08:272021/05/07 10:08:27
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