Hitachi RPI-0.8FSG1 Service Manual page 373

<Example>
System A
Refrigerant: 60kg
2 4
E D
Floor Floor
2 2
40m 70m
Gas Leak Detector
3
Ventilator 2m /min
Room R (kg)
A 50
B 110
C 60
D 60
C + D 60
E 60
If local codes or regulations are specified, follow them.
<Example>
British Standard BS4434 1989
R22 Commercial Office Building Class D Occupancy
MR = C✕V
MR: Maximum Charge or Leakage of Refrigerant (kg)
C: Maximum Allowable Concentration = 0.17 (kg/m
V: Volume of Space (m
System A
Outdoor Unit
20HP
4 5 5
D
Floor Floor
2
70m 400m
Opening: 0.06m
3
V (m ) C (kg/m
300 0.17
1000 0.11
175 0.34
175 0.34
350 0.171
100 0.6
3
)
FIELD WORK INSTRUCTION
System B
Outdoor Unit
18HP
System B
Refrigerant: 50kg
5 5 3
B
2
2
3
Countermeasure
)
-
-
2
0.06m Opening
2
0.06m Opening
-
3
2m /min. Ventilator Linked with
Gas Leak Detector
3 )
3
Height
A 2.5m
Floor
2
120m
5-13