Hitachi RAS-3.0HNSKQ Original Instruction page 11

Do not perform installation work, refrigerant piping work, drain pump, drain piping and electrical wiring
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connection without referring to our installation manual. If the instructions are not followed, it may result in
a water leakage, electric shock or a fire.
Use the specified non-flammable refrigerant (R410A) to the outdoor unit in the refrigerant cycle. Do not
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charge material other than R410A into the unit such as hydrocarbon refrigerants (propane or etc.),
oxygen, flammable gases (acetylene or etc.) or poisonous gases when installing, maintaining and moving.
These flammable gases are extremely dangerous and may cause an explosion, a fire and injury.
Do not pour water into the indoor or outdoor unit. These products are equipped with electrical parts. If
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poured, it will cause a serious electrical shock.
Do not open the service cover or access panel for the indoor or outdoor units without turning OFF the
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main power supply.
Do not touch or adjust safety devices inside the indoor unit or outdoor units. If these devices are touched
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or readjusted, it may cause a serious accident.
Refrigerant leakage can cause difficult with breathing due to insufficient air. Turn OFF the main switch,
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extinguish any naked flame and contact your service contractor, if refrigerant leakage occurs.
Make sure that the refrigerant leakage test should be performed. Refrigerant (Fluorocarbon) for this unit is
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incombustible, non-toxic and odorless. However if the refrigerant is leaked and is contacted with fire toxic
gas will generate. Also because the fluorocarbon is heavier than air, the floor surface will be filled with it,
which could cause suffocation.
The installer and system specialist shall secure safety against refrigerant leakage according to local
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regulations or standards.
Use an ELB (Earth Leakage Breaker). In the event of fault, there is danger of an electric shock or a fire if
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it is not used.
Do not install the outdoor unit where there is high level of oil mist, flammable gases, salty air or harmful
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gases such as sulfur.
For installation, firmly connect the refrigerant pipe before the compressor starts operating. For
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maintenance, relocation and disposal, remove the refrigerant pipe after the compressor stops.
Do not perform a short-circuit of the protection device such as a pressure switch when operating. It may
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cause a fire and explosion.
The A-weighted emission sound pressure level do not exceeds 70 dB(A)
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Do not use any sprays such as insecticide, lacquer, hair spray or other flammable gases within
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approximately one meter from the system.
If circuit breaker or fuse is often activated, stop the system and contact your service contractor.
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Check that the ground wire is securely connected. If the unit is not correctly grounded, it lead electric
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shock. Do not connect the ground wiring to gas piping, water piping, lightning conductor or ground wiring
for telephone.
Connect a fuse of specified capacity.
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Before performing any brazing work, check to ensure that there is no flammable material around. When
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using refrigerant be sure to wear leather gloves to prevent cold injuries.
Protect the wires, electrical parts, etc. from rats or other small animals. If not protected, rats may gnaw at
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unprotected parts and which may lead to a fire.
Fix the cables securely. External forces on the terminals could lead to a fire.
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Provide a sufficiently strong foundation. If not, the unit may fall down and it may lead to injuries.
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