3.7 Precautions in the event of refrigerant gas 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 gas leaks.
3.7.1 Maximum permissible concentration of hydrofluorocarbon (HFC)
The R410A refrigerant gas, used in the equipment, is non-flammable and non-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.
According to Standard EN378-1, the maximum permissible concentration of HFC R410A gas in the air is 0.44 kg/m
3
.
Therefore, effective measures must be adopted to maintain the concentration of R410A gas in the air below 0.44 kg/m
3
in
the event of a leak.
3.7.2 Calculation of the concentration of refrigerant gas
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
: gas refrigerant concentration ( = 0.44 kg/m
3
for R410A gas).
3.7.3 Countermeasures in the event of refrigerant gas leaks
The room should have the following characteristics in case of a leak of refrigerant gas:
1
Opening without shutter to permit the circulation of fresh air in the room.
2
Opening without door measuring 0.15%, or greater, of the floor surface.
3
A fan with a capacity of at least 0.4 m
3
/minute per ton of Japanese refrigeration (=volume moved by the compressor /
5.7 m
3
/h) or above, connected to a gas sensor in the air conditioning system that uses gas refrigerant.
D A N G E R
Special attention should be given to areas where the refrigerant gas may be deposited and stay in the room, such
as basements or similar, as the gas is heavier than air.
3 Piping work and
refrigerant charge
110
SMGB0063 rev. 1 - 10/2010
Summary of Contents for Econofresh
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Page 4: ...Index ii SMGB0063 rev 1 10 2010 ...
Page 12: ...Index x SMGB0063 rev 1 10 2010 ...
Page 24: ...1 General information 12 SMGB0063 rev 1 10 2010 ...
Page 88: ...2 Unit installation 76 SMGB0063 rev 1 10 2010 ...
Page 169: ... KPI 3002H2E heat recovery unit 4 Electrical wiring 157 SMGB0063 rev 1 10 2010 4 ...
Page 170: ...4 Electrical wiring 158 SMGB0063 rev 1 10 2010 ...
Page 192: ...5 Control system 180 SMGB0063 rev 1 10 2010 ...
Page 234: ...6 Optional functions 222 SMGB0063 rev 1 10 2010 ...
Page 252: ...9 1 RCD 1 0 3 0 FSN2 9 Spare parts 240 SMGB0063 rev 1 10 2010 ...
Page 254: ...9 2 RCD 4 0 5 0 FSN2 9 Spare parts 242 SMGB0063 rev 1 10 2010 ...
Page 256: ...9 3 RPC 4 0 6 0 FSN2E 9 Spare parts 244 SMGB0063 rev 1 10 2010 ...
Page 258: ...9 4 RPI 0 8 1 5 FSNE 9 Spare parts 246 SMGB0063 rev 1 10 2010 ...
Page 260: ...9 5 RPI 8 0 10 0 FSN2E 9 Spare parts 248 SMGB0063 rev 1 10 2010 ...
Page 262: ...9 6 RPIM 0 8 1 5 FSNE DU 9 Spare parts 250 SMGB0063 rev 1 10 2010 ...
Page 264: ...9 7 RPK 1 0 1 5 FSN2E 9 Spare parts 252 SMGB0063 rev 1 10 2010 ...
Page 268: ...9 9 RPK 2 0 FSN2E 9 Spare parts 256 SMGB0063 rev 1 10 2010 ...
Page 270: ...9 10 RPK 2 5 4 0 FSN2E 9 Spare parts 258 SMGB0063 rev 1 10 2010 ...
Page 272: ...9 11 RPF 1 0 2 5 FSN2E 9 Spare parts 260 SMGB0063 rev 1 10 2010 ...
Page 274: ...9 12 RPFI 1 0 2 5 FSN2E 9 Spare parts 262 SMGB0063 rev 1 10 2010 ...
Page 276: ...9 Spare parts 264 SMGB0063 rev 1 10 2010 ...
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