Check Of Density Limit - Panasonic R410A Installation Instructions Manual

• 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 Servicing
• Turn the power OFF at the main power box (mains)
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.
WARNING
• This product must not be modified or
disassembled under any circumstances.
Modified or disassembled unit may cause fire,
electric shock or injury.
• Do not clean inside the indoor and outdoor units
by users. Engage authorized dealer or specialist
for cleaning.
• In case of malfunction of this appliance, do not
repair by yourself. Contact to the sales dealer or
service dealer for a repair.

Check of Density Limit

The room in which the air conditioner is to be
installed requires a design that in the event of
refrigerant gas leaking out, its density will not exceed
a set limit.
The refrigerant (R410A), which is used in the air
conditioner, is safe, without the toxicity or combustibility of
ammonia, and is not restricted by laws imposed to protect
the ozone layer. However, since it contains more than air,
it poses the risk of suffocation if its density should rise
excessively. Suffocation from leakage of refrigerant is
almost non-existent. With the recent increase in the
number of high density buildings, however, the installation
of multi air conditioner systems is on the increase
because of the need for effective use of floor space,
individual control, energy conservation by curtailing heat
and carrying power, etc.
Most importantly, the multi air conditioner system is able
to replenish a large amount of refrigerant compared to
conventional individual air conditioners.
CAUTION
• Do not touch the air inlet or the sharp
aluminum fins of the outdoor unit. You
may get injured.
• Ventilate any enclosed areas when installing or
testing the refrigeration system. Escaped
refrigerant gas, on contact with fire or heat, can
produce dangerously toxic gas.
• Confirm after installation that no refrigerant gas
is leaking. If the gas comes in contact with a
burning stove, gas water heater, electric room
heater or other heat source, it can cause the
generation of poisonous gas.
Others
WARNING
• Do not sit or step on the unit, you may fall
down accidentally.
CAUTION
• Do not touch the air inlet or the sharp
aluminum fins of the outdoor unit.
You may get injured.
• Do not stick any object into the FAN
CASE.
You may be injured and the unit may be
damaged.
If a single unit of the multi air conditioner system is to be
installed in a small room, select a suitable model and
installation procedure so that if the refrigerant
accidentally leaks out, its density does not reach the limit
(and in the event of an emergency, measures can be
made before injury can occur).
ASHRAE and the International Mechanical Code of the
ICC as well as CSA provide guidance and define
safeguards related to the use of refrigerants, all of which
define a Refrigerant Concentration Level (RCL) of
25 pounds (11.3 kg) per 1,000 cubic feet (28.3 m
R410A refrigerant.
For additional guidance and precautions related to
refrigerant safety, please refer to the following documents:
International Mechanical Code 2012 (IMC-2012)
(or more recently revised)
ASHRAE 15
ASHRAE 34
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