Caution For Refrigerant Leaks; Maximum Concentration Level; Procedure For Checking Maximum Concentration; Disposal Requirements - Daikin CMSQ200A7W1B Installationsanleitung

14. C
AUTION FOR REFRIGERANT LEAKS
Introduction
The installer and system specialist shall secure safety against
leakage according to local regulations or standards. The
following standards may be applicable if local regulations are
not available.
This system uses R410A as refrigerant. R410A 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 1 m
Compliance to the local applicable regulations and standards for the
maximum allowable concentration level is required.
According to the appropriate European Standard, the maximum
allowed concentration level of refrigerant to a humanly space for
3
R410A is limited to 0.44 kg/m .
1 direction of the refrigerant flow
2 room where refrigerant leak has occurred (outflow of all the
refrigerant from the system)
Pay special attention to places, such as a basements, etc. where
refrigerant can stay, since refrigerant is heavier than air.

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 charging
refrigerant in a amount (amount of
single unit system refrigerant added
(amount of locally in
refrigerant with accordance with
which the system the length or
is charged before diameter of the
leaving the factory) refrigerant piping)
Where a single refrigerant facility is divided into
NOTE
2 entirely independent refrigerant systems, use the
amount of refrigerant with which each separate system
is charged.
Installation manual
22
3
(the weight in
volume of the occupied space).
1
2
=
total amount of
refrigerant (kg) in
the system
2 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
2 partition
(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.)
3 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.
4 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 supplier.
15. D
ISPOSAL REQUIREMENTS
Dismantling of the unit, treatment of the refrigerant, of oil and of other
parts must be done in accordance with relevant local and national
legislation.
3
)
1
2
maximum concentration level
3
(kg/m )
CMSQ200+250A7W1B
Air conditioning system
4PW47543-1