Caution For Refrigerant Leaks - Daikin RZQ18PVJU Installation Manual

When nothing is displayed in the remote controller
• There might be a problem with the connection or transmis-
sion between the indoor unit and the remote controller.
Check connections, and check for wire breakage.
CAUTION
<To piping technician>
<To electrician>
• After fi nishing the test operation and before using the
unit by customer, confi rm that the outside panels and
screws are attached securely to the units.
10.

CAUTION FOR REFRIGERANT LEAKS

DANGER
• Refrigerant gas is heavier than air and replaces oxygen. A
massive leak could lead to oxygen depletion, especially in
basements, and an asphyxiation hazard could occur leading
to serious injury or death.
(Points to note in connection with refrigerant leaks)
Introduction
The installer and system specialist shall secure safety
against leakage according to local regulations or stan-
dards. 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 conditioning facilities are installed in a room
which is suffi ciently 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 accor-
dance 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./ft³ ( the
weight in lb. of the refrigerant gas in 1ft³ volume of the occu-
pied space).
Compliance to the local applicable regulations and standards
for the maximum allowable concentration level is required.
Direction of the refrigerant flow
17
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-
ant in the unit
(amount of refriger-
ant with which the
system is charged
before leaving the
factory)
• 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.
2.
Calculate a room volume (ft³)
3.
Calculate the refrigerant concentration by using the results
of the calculations in steps 1 and 2 above.
total amount of refrigerant in the
system
volume (ft³) of the room in which there
is an indoor unit installed
4.
Deal 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.
Room where
refrigerant leak
has occurred
(outflow of all the
refrigerant from
the system)
additional charging
amount (amount of
+
refrigerant added
locally in accordance
with the length or
diameter of the
refrigerant piping)
NOTE
total amount
of refrigerant
=
(lb.) in the
system
≤
maximum concentration
level (lb./ft³)
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