Disposal Requirements; Caution For Refrigerant Leaks; Maximum Concentration Level; Procedure For Checking Maximum Concentration - Panasonic CU-5MX1SPP Installationsanleitung

Disposal requirements

Dismantling of the unit, treatment of the refrigerant, oil and eventual
other parts, should be done in accordance with the relevant local and
national regulations.
C
AUTION FOR REFRIGERANT LEAKS
(Points to note in connection with refrigerant leaks.)
Introduction
The Urban Multi system, like other air conditioning systems, uses R-
407C as refrigerant. R-407C itself is an entirely safe non-toxic, non-
combustible refrigerant. Nevertheless care must be taken to ensure
that air conditioning facilities are installed in a room which is
sufficiently large. This assures that the maximum concentration level
of refrigerant gas is not exceeded, in the unlikely event of major leak
in the system and this in accordance to the local applicable
regulations and standards.

Maximum concentration level

The maximum charge of refrigerant and the calculation of the
maximum concentration of refrigerant is directly related to the
humanly occupied space in to which it could leak.
The unit of measurement of the concentration is kg/m
3
kg of the refrigerant gas in 1m volume of the occupied space).
Compliance to the local applicable regulations and standards for the
maximum allowable concentration level is required.
In Japan the maximum allowed concentration level of refrigerant to a
humanly space for R-407C is limited to 0.31 kg/m
1 direction of the refrigerant flow
room where refrigerant leak has occurred (outflow of all the
2
refrigerant from the system)

Procedure for checking maximum concentration

Check the maximum concentration level in accordance with steps 1
to 4 below and take whatever action is necessary to comply.
1 Calculate the amount of refrigerant (kg) charged to each system
separately.
+
amount of additional
refrigerant in a charging amount
single unit (amount of
system (amount refrigerant
of refrigerant added locally in
with which the accordance with
system is the length or
charged before diameter of the
leaving the refrigerant
factory) piping)
NOTE Where a single refrigerant facility is divided into
2 entirely independent refrigerant systems then use
the amount of refrigerant with which each separate
system is charged.
Installation manual
12
2
3
( the weight in
3
3
.
1
2
4
=
total amount of
refrigerant (kg) in
the system
Calculate the smallest room volume (m
In a case such as the following, calculate the volume of (A), (B)
as a single room or as the smallest room.
A. Where there are no smaller room divisions
B. Where there is a room division but there is an
opening between the rooms sufficiently large to
permit a free flow of air back and forth.
1 opening between rooms
partition
2
(Where there is an opening without a door or where there
are openings above and below the door which are each
equivalent in size to 0.15% or more of the floor area.)
Calculating the refrigerant density using the results of the
calculations in steps 1 and 2 above.
total volume of
refrigerant in the
≤
refrigerant system
3
size (m ) of smallest
room in which there is
an indoor unit installed
If the result of the above calculation exceeds the maximum
concentration level then make similar calculations for the second
then third smallest room and so until the result falls short of the
maximum concentration.
Dealing with the situations where the result exceeds the
maximum concentration level.
Where the installation of a facility results in a concentration in
excess of the maximum concentration level then it will be
necessary to revise the system.
Please consult your Panasonic supplier.
3
)
1
2
maximum concentration level
3
(kg/m )
CU-5~10MX1SPP
Urban Multi air conditioner
4PW12336-1C