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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 efficiently.
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.
This product is intended for professional use.
Permission from the power supplier is required when
installing the U-8ME1E81 outdoor unit that is connected
to a 16 A distribution network.
This equipment complies with EN/IEC 61000-3-12
provided that the short-circuit power Ssc is greater than
or equals to the values corresponding to each model as
shown in the table below at the interface point between
the user’s supply and the public system.
It is the responsibility of the installer or user of the
equipment to ensure; by consultation with the distribution
network operator if necessary that the equipment is
connected only to supply with a short-circuit power Ssc
greater than or equals to the values corresponding to
each model as shown in the table below.
U-10ME1E81U-12ME1E81U-14ME1E81U-16ME1E81U-18ME1E81U-20ME1E81
U-10ME1E81U-12ME1E81U-14ME1E81U-16ME1E81U-18ME1E81U-20ME1E81
Ssc
1,150 kVA1,550 kVA 1,550 kVA1,550 kVA 1,550 kVA 1,550 kVA
This equipment complies with EN/IEC 61000-3-11
provided that the system impedance Zmax is less than
or equal to the values corresponding to each model as
shown in the table below at the interface point between
the user’s supply and the public system. Consult with
the supply authority for the system impedance Zmax.
Zmax
— 0.290 0.290 0.290
0.290 0.290
Pay close attention to all warning and caution notices
given in this manual.
WARNING
This symbol refers to a hazard or unsafe
practice which can result in severe
personal injury or death.
CAUTION
This symbol refers to a hazard or
unsafe practice which can result in
personal injury or product or property
damage.
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.
SPECIAL PRECAUTIONS
WARNING
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 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-8ME1E81 U-10ME1E81 U-12ME1E81 U-14ME1E81
Circuit
breaker
25 A 25 A 35 A 35 A
U-16ME1E81U-18ME1E81U-20ME1E81
Circuit
breaker
45 A 50 A 50 A
• Provide a power outlet exclusively for
each unit, and full disconnection means
having a contact separation 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.
…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
WARNING
• When performing piping work do
not mix air except for specified
refrigerant (R410A) in refrigeration
cycle. It causes capacity down,
and risk of explosion and injury
due to high tension inside the
refrigerant cycle.
•
•
Refrigerant gas leakage may
cause fire.
Do not add or replace refrigerant
other than specified type. It may
cause product damage, burst and
injury, etc.
•
•
•
• 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.
•
•
Ventilate the room well, in the event
that is refrigerant gas leaks during the
installation. Be careful not to allow
contact of the refrigerant gas with a
flame as this will cause the generation
of poisonous gas.
Keep all tubing runs as short as
possible.
Use the flare method for connecting
tubing.
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.
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 fins on the
air conditioner can cut your fingers.
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 a Room
Properly insulate any tubing run inside a
room to prevent “sweating” that can
cause dripping and water damage to
walls and floors.
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.
SM830204-05_2WAY SYS_new.indb 3 15/01/05 11:56:43
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