Safety Precautions; Important! Please Read Before Starting; Special Precautions - Hitachi R410A Manuel D'installation

1. SAFETY PRECAUTIONS

1.1. IMPORTANT! Please read before starting

This air conditioning system meets strict safety and operating
standards.
As the installer or service person, it is an important part of
your job to install or service the system so it operates safely
and ef¿ ciently.
For safe installation and trouble-free operation, you must:
• Carefully read this instruction booklet before beginning.
• Follow each installation or repair step exactly as shown.
• Observe all local, state, and national electrical codes.
• Pay close attention to all danger, warning, and caution
notices given in this manual.
This symbol refers to a hazard or unsafe
WARNING:
practice which can result in severe personal
injury or death.
This symbol refers to a hazard or unsafe
CAUTION:
practice which can result in personal injury
and the potential for product or property
damage.
• Hazard alerting symbols
Electrical
Safety/alert
If Necessary, Get Help
These instructions are all you need for most installation sites
and maintenance conditions. If you require help for a special
problem, contact our sales/service outlet or your certified
dealer for additional instructions.
In Case of Improper Installation
The manufacturer shall in no way be responsible for improper
installation or maintenance service, including failure to follow
the instructions in this document.

1.2. SPECIAL PRECAUTIONS

When Wiring
ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL
INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED
ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.
• 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 sys-
tem. Carefully refer to the wiring diagram and these instruc-
tions when wiring. Improper connections and inadequate
grounding can cause accidental injury or death.
• Ground the unit following local electrical codes.
• Connect all wiring tightly. Loose wiring may cause overheat-
ing at connection points and a possible ¿ re hazard.
When Transporting
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 ¿ ns on the air conditioner can cut your ¿ ngers.
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When Installing...
...In a Ceiling or Wall
Make sure the ceiling/wall is strong enough to hold the unit's
weight. It may be necessary to construct a strong wood or
metal frame to provide added support.
...In a Room
Properly insulate any tubing run inside a room to prevent
"sweating" that can cause dripping and water damage to walls
and À oors.
...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 bafÀ e.
...In a Snowy Area (for Heat Pump-type Systems)
Install the outdoor unit on a raised platform that is higher than
drifting snow.
When Connecting Refrigerant Tubing
• Keep all tubing runs as short as possible.
• Use the À are method for connecting tubing.
• Apply refrigerant lubricant to the matching surfaces of the
À are and union tubes before connecting them, then tighten
the nut with a torque wrench for a leak-free connection.
• Check carefully for leaks before opening the refrigerant
valves.
When Servicing
• Turn the power OFF at the main circuit breaker panel
before opening the unit to check or repair electrical parts
and wiring.
• Keep your fingers and clothing away from any moving
parts.
• Clean up the site after you finish, remembering to check
that no metal scraps or bits of wiring have been left inside
the unit being serviced.
• After installation, explain correct operation to the customer,
using the operating manual.
Never touch electrical components immediately
after the power supply has been turned off. Electri-
cal shock may occur. After turning off the power,
always wait 5 minutes or more before touching
electrical components.
DANGER
9/10/2010 11:10:05 AM