Disposal Requirements; Maximum Concentration Level; Procedure For Checking Maximum Concentration - Daikin RYYQ8T7Y1B Installation And Operation Manual

18.2. 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
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
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 basements etc., where
refrigerant can stay, since refrigerant is heavier than air.

18.3. 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
refrigerant in a
single unit system
+
(amount of
refrigerant with
which the system
is charged before
leaving the factory)
NOTICE
Where a single refrigerant facility is divided into 2 entirely
independent refrigerant systems, use the amount of
refrigerant with which each separate system is charged.
2 Calculate the volume of the room (m
installed.
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.
Installation and operation manual
49
3
(the weight in
3
volume of the occupied space).
3
.
1
2
Additional charging
amount (amount of
refrigerant added
=
amount of
locally in
refrigerant
accordance with
(kg) in the
the length or
diameter of the
refrigerant piping)
3
) where the indoor unit is
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
If the result of the above calculation exceeds the maximum
concentration level, a ventilation opening to the adjacent room
shall be made.
4 Calculate the refrigerant density taking the volume of the room
where the indoor unit is installed and the adjacent room.
Install ventilation openings in the door of adjacent rooms until
the refrigerant
concentration level.

19. Disposal 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.
Total
system
1
2
1 Opening between the 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.)
≤
installed
density is smaller
RYYQ+RYMQ+RXYQ8~20T7Y1B
VRV IV System Air Conditioner
Maximum concentration
3
level (kg/m )
than the maximum
4P329765-1 – 2012.09