Hitachi CENTRIFUGAL VRF Serie Bedienungsanleitung Seite 26

ELECTRICaL WIRING
Power source from the RASC
unit to the indoor unit
RASC unit of system
Terminal board
Circuit breaker
Earth leakage breaker
Field wiring
Field-supplied
Optional accessory
10.2 ELECTRICAL CONNECTION OF THE RASC UNIT
!
C A U T I O N
Check to ensure that the field supplied electrical components (mains power switches, circuit breakers, wires, connectors and wire terminals) have been
properly selected according to the electrical data indicated on this chapter and they comply with national and local codes. If it is necessary, contact with
your local authority in regards to standards, rules, regulations, etc.
10.2.1 Wiring size
Recommended minimum sizes for field provided wires and select the main switches in according to the next table:
Model Power supply
RASC-4HNPE
RASC-5HNPE
RASC-6HNPE 3N~ 400V 50Hz
RASC-8HNPE
RASC-10HNPE
?
N O T E
Use wires which are not lighter than the polychloroprene sheathed flexible cord (code designation 60245 IEC 57)
ELB: Earth leakage breaker; CB: Circuit breaker.
10.2.2 Minimum requirements of the protection devices
!
C A U T I O N
• Ensure specifically that there is an Earth Leakage Breaker (ELB)
installed for the units (outdoor and indoor unit).
• If the installation is already equipped with an Earth Leakage Breaker
(ELB), ensure that its rated current is large enough to hold the current
of the units (outdoor and indoor).
16 PMML0399B rev.1 - 07/2016
nº 0
3 N
Operating line (twisted
shielded pair cable or shielded
pair cable)
DC5V (non-pole transmission,
H-LINK system)
Indoor unit Indoor unit
Remote control switch
(example for simultaneous control)
Power supply
Max. current
(A)
EN60 335-1
14.1 4 x 4.0mm
14.1 4 x 4.0mm
16.0 4 x 4.0mm
24.7 4 x 6.0mm
24.7 4 x 6.0mm
Transmitting cable
cable size size
EN60 335-1
+ GND
2
+ GND
2
+ GND 2 x 0.75mm
2
+ GND
2
+ GND
2
?
N O T E
• Electric fuses can be used instead of magnetic Circuit Breakers (CB).
In that case, select fuses with similar rated values as the CB.
• The Earth Leakage Breaker (ELB) mentioned on this manual is also
commonly known as Residual Current Device (RCD) or Residual
Current Circuit Breaker (RCCB).
• The Circuit Breakers (CB) are also known as Thermal-Magnetic
Circuit Breakers or just Magnetic Circuit Breakers (MCB).
Independent power source of RASC
unit and indoor unit (example)
RASC unit of system
nº 0
3 N
Operating line (twisted
Indoor unit
Remote control switch
(example for simultaneous control)
CB
(A)
20
20
20
2
30
30
shielded pair cable or
shielded pair cable)
DC5V (non-pole
transmission, H-LINK
system)
Indoor unit
ELB
(no. poles/A/mA)
4/40/30