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manufacturer if in doubt. In addition, a set of calibrated weighing scales shall be available and in good
working order. Hoses shall be complete with leak-free disconnect couplings and in good condition.
The recovered refrigerant shall be processed according to local legislation in the correct recovery
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cylinder, and the relevant waste transfer note arranged. Do not mix refrigerants in recovery units and
especially not in cylinders.
If compressors or compressor oils are to be removed, ensure that they have been evacuated to an
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acceptable level to make certain that flammable refrigerant does not remain within the lubricant. The
compressor body shall not be heated by an open flame or other ignition sources to accelerate this
process. Draining of oil from a system shall be carried out safely.
Disposal of equipment shall follow the national regulations.
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The storage of the appliance should be in accordance with the applicable regulations or instructions,
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whichever is more stringent.
The maximum number of pieces of equipment permitted to be stored together notes by each product
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package information and standard following ISO 780-2015 or local regulation.
After completing the installation work, check that the refrigerant gas does not leak throughout the system.
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When installing or relocating the air conditioner, do not let any other substances besides R32, such as
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air, enter the refrigerant circuit. The presence of air or foreign matter in the refrigerant circuit causes an
abnormal pressure rise, which may result in equipment damage and even injury.
Refrigerant R32 in the system must be kept clean, dry, and tight.
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○ Clean and Dry -- Foreign materials (including mineral oils such as SUNISO oil or moisture) should be
prevented from getting into the system.
○ Tight -- R32 does not contain any chlorine, does not destroy the ozone layer, and does not reduce the
earth's protection again harmful ultraviolet radiation. R32 can contribute to the greenhouse effect if
it is released.
Only use tools for R32, such as a gauge manifold, charge hose, gas leak sensor, reverse flow check valve,
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refrigerant charge base, vacuum gauge, or refrigerant recovery equipment.
If the conventional refrigerant and refrigerator oil are mixed in R32, the refrigerant may deteriorate.
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For Ducts indoor units, it shall not contain a potential ignition source in the duct system, such as
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electrical heating.
For Duct indoor units, when connected via an air duct system to one or more rooms, the supply and
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return air shall be directly ducted to the space. Open areas such as false ceilings shall not be used as a
return air duct.
Duct indoor units that connected via an air duct system to one or more rooms, auxiliary devices which
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can be a potential ignition source shall not be installed in the ductwork. Examples of such potential
ignition sources are hot surfaces and electric switching devices.
If LEAK DETECTION SYSTEM is installed, unit must be powered except for service. Some duct indoor units
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may be equipped with a refrigerant leak sensor for safety, to be effective, the unit must be powered at all
times after installation, other than when servicing.
For duct indoor units, if refrigerant leak sensor is used, it shall only be replaced with refrigerant sensors
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specified and approved by the appliance manufacturer.
For some duct indoor units that refrigerant leak sensor may be used, when the alarm be activated and
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error code be showed on the wired remote controller, it means that there may have been a leak. Open
the window immediately for ventilation, and avoid any sources of ignition. After 10 minutes, shut down
and check the cause of the malfunction.
For duct indoor units that connected via an air duct system to one or more rooms , even if refrigerant
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leak sensor is used, ensure the total room area not less than the A
The pipe-work shall not be installed in an unventilated space, if that space is smaller than A
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below, where installed pipe-work shall has no connecting joints.
Duct indoor units that connected via an air duct system to one or more rooms are installed in a room
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with an area less than A
in table below, that room shall be without continuously operating open
min
defined in table below.
min
-ix-
in table
min
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