Turn the DSW5 contact number four (on PCB1) to OFF when the refrigerant charge is sufficient. Wait at least three minutes
before turning the DSW5 contact number four (on PCB1) to OFF so that the outdoor unit is ready to start operating.
N O T E
•
During the check, the seven-segment display may change to the protection control code due to the protection
control being activated, although this is quite normal.
•
Consult the information on the inside of the unit service cover for further information on the protection control
code.
C A U T I O N
•
Releasing refrigerant into the atmosphere is forbidden.
•
Where the amount of refrigerant charged in the system is to be corrected, it must be collected appropriately.
•
Follow the instructions given on the specific label attached to the unit with regards to the refrigerant.
•
Fill in the F-Gas Label.
3.1.9 Precautions in the event of refrigerant leaks
D A N G E R
Fitters and the designers of the installations must strictly observe local and national legislation, and local codes
regarding safety requirements in the event of refrigerant leaks.
¿
Maximum permitted concentration of hydrofluorcarbon (HFC)
The R410A refrigerant gas, used in the equipment, is fireproof and not toxic.
D A N G E R
In the event of a leak, the gas will spread around the room, displacing the air, and could therefore result in asphyxia.
The maximum permitted concentration of HFC R410A gas in the air is 0.44 kg/m
3
, in accordance with standard EN378-1.
Therefore, efficient measures should be adopted to ensure the concentration of R410A gas in the air is kept below 0.44 kg/
m
3
in the event of a leak.
¿
Calculation of the refrigerant concentration
1
Calculate the total quantity of refrigerant
R
(kg) charged in the system; to do so, connect all the indoor units of the rooms
in which you wish to have air conditioning.
2
Calculate the volume
V
(m
3
) of each room.
3
Calculate the refrigerant concentration
C
(kg/m
3
) of the room in accordance with the following formula:
R / V = C
R
: Total quantity of refrigerant charged (kg).
V
: volume of the room (m
3
).
C
: concentration of refrigerant (= 0.44 kg/m
3
for R410A gas).
3 Piping work and
refrigerant charge
63
SMGB0065 rev. 1 - 12/2010
3
