Caution For Refrigerant Leaks - Daikin RZQ24TAVJU Installation Manual

12. CAUTION FOR REFRIGERANT LEAKS

(Points to note in connection with 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.
The SPLIT System, like other air conditioning systems, uses R410A as
refrigerant. R410A itself is an entirely safe non-toxic, non-combustible
refrigerant. Nevertheless care must be taken to ensure that air condi-
tioning 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 lb./ft
3
of the refrigerant gas in 1ft volume of the occupied space).
Compliance to the local applicable regulations and standards for the
maximum allowable concentration level is required.
Direction of the refrigerant flow
Pay a special attention to the place, such as a basement, 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 (lb.) charged to each system
separately.
amount of refriger- additional charging
ant in the unit + amount (amount of
(amount of refrig- refrigerant added
erant with which locally in accordance
the system is with the length of the
charged before refrigerant piping and
leaving the factory) type of indoor unit)
NOTE
• Where a single refrigerant facility is divided into 2 entirely indepen-
dent refrigerant systems then use the amount of refrigerant with
which each separate system is charged.
3
2. Calculate a room volume (ft )
3. Calculating the refrigerant concentration by using the results of the
calculations in steps 1 and 2 above.
total amount of refrigerant in the
refrigerant system
3
volume (ft ) of the room in which
there is an indoor unit installed
English
3
(the weight in lb.
Room where
refrigerant leak has
occurred (outflow of
all the refrigerant
from the system)
total amount
= of refriger-
ant (lb.) in
the system

maximum concen-
3
tration level (lb./ft )
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 dealer.
17