Minimum Requirements Of The Protection Devices - Hitachi YUTAKI S80 R410A Series Installation And Operation Manual

6.2.2 Minimum requirements of the protection devices
!
CAUTION
• 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 unit).

NOTE
• 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).
◆ Indoor unit alone
Power
Model
supply
RWH‑4.0VNFE
~ 230V
RWH‑5.0VNFE
50Hz
RWH‑6.0VNFE
RWH‑4.0NFE
3N~
RWH‑5.0NFE 400V
50Hz
RWH‑6.0NFE
PMEN0648 rev.0 - 03/2023
Operation mode
Without DHW tank heater
With DHW tank heater
Without DHW tank heater
With DHW tank heater
Without DHW tank heater
With DHW tank heater
Without DHW tank heater
With DHW tank heater
Without DHW tank heater
With DHW tank heater
Without DHW tank heater
With DHW tank heater
Max. current
Power supply cables CB
(A)
MC EN60335‑1
24 2 x 6.0 mm² + GND
38 2 x 10.0 mm² + GND
28 2 x 6.0 mm² + GND
42 2 x 10.0 mm² + GND
31 2 x 6.0 mm² + GND
45 2 x 10.0 mm² + GND
10 4 x 2.5 mm² + GND
24 4 x 4.0 mm² + GND
10 4 x 2.5 mm² + GND
24 4 x 4.0 mm² + GND
10 4 x 2.5 mm² + GND
24 4 x 4.0 mm² + GND
ELB
(nº of
(A)
poles/A/mA)
6
32 2/40/30
40 2/40/30
32 2/40/30
50 2/63/30
32 2/40/30
50 2/63/30
15 4/40/30
25 4/40/30
15 4/40/30
25 4/40/30
15 4/40/30
25 4/40/30
45