Connection Of The Power Supply Circuits - Hitachi FSXN Series Service Manual

4 Electrical wiring
4 During the preliminary preparation work of the electricity supply line for the unit, the provisions in local and national
legislation must never be violated.
5 Check that the earth cable is correctly connected.
D A N G E R
• Never connect the earth cable to the refrigerant pipes. The gas in the pipes could cause a fire.
• Do not connect the earth cable to the lighting rod. The electrical potential of earth would increase
abnormally.

4.1.3 Connection of the power supply circuits

¿ Cable sizes
Outdoor units:
Model Supply voltage
RAS-8FSXN
RAS-10FSXN
RAS-12FSXN
3N~ 400V 50Hz
RAS-14FSXN
RAS-16FSXN
RAS-18FSXN
(1)
The cross-sections of the cable should be selected for the maximum current of the unit, in accordance with European
Standard EN60 335-1.
(2)
The cross-sections of the cable have been selected for the maximum current of the unit, in accordance with MLFC cable
(Flame Retardant Polyflex Wire) manufactured by HITACHI Cable Ltd., Japan.
N O T E
Do not use cables that are lighter than the normal flexible coated polychloroprene cable (code H05RN-F).
¿ Main breaker switch
Model Supply voltage
RAS-8FSXN
RAS-10FSXN
RAS-12FSXN
3N~ 400V 50Hz
RAS-14FSXN
RAS-16FSXN
RAS-18FSXN
(1)
ELB: earth leakage breaker (field-supplied).
(2)
CB: circuit breaker (field-supplied).
¿
Voltage supply
Service voltage
Between 90 and 110% of the rated voltage.
Start-up voltage
Between 85 and 115% of the rated voltage.
73
SMGB0065 rev. 1 - 12/2010
Cross section of the power cable
Maximum
current
(A)
2
EN60 335-1 (mm )
12 2.5
16 2.5
22 6
26 6
29 10
31 10
Maximum
current (A)
Rated current (A)
12 40
16 40
22 40
26 40
29 63
31 63
Cross section of the service
EN60 335-1
(1) 2 (2)
MLFC (mm )
(mm
2.0
2.0
3.5
0.75
5.5
5.5
8
(1)
ELB
Sensitivity (mA)
30
30
30
30
30
30
cable
2 (2)
MLFC (mm )
2 (1)
)
4
0.75
(2)
CB
Rated current (A)
20
20
30
40
40
50