Hitachi YUTAKI S80 Serie Manual De Instalación Y Funcionamiento página 50

6.1 General check
• Make sure that the following conditions related to power supply installation are satisfied:
✓ The power capacity of the electrical installation is large enough to support the power
demand of the YUTAKI system (outdoor unit + indoor unit + DHW tank (if apply)).
✓ The power supply voltage is within ±10% of the rated voltage.
✓ The impedance of the power supply line is low enough to avoid any voltage drop of more
than 15% of the rated voltage.
• Following the Council Directive 2004/108/EC, relating to electromagnetic compatibility, the
table below indicates the Maximum permitted system impedance Z
the user's supply, in accordance with EN61000‑3‑11.
6.1.1 Indoor unit alone
Model Power supply
RWH‑4.0VNFE
RWH‑5.0VNFE ~ 230V 50Hz
RWH‑6.0VNFE
RWH‑4.0NFE
RWH‑5.0NFE 3N~ 400V 50Hz
RWH‑6.0NFE
6.1.2 Indoor unit in combination with DHW tank
Model Power supply
RWH‑4.0VNFWE
RWH‑5.0VNFWE ~ 230V 50Hz
RWH‑6.0VNFWE
RWH‑4.0NFWE
RWH‑5.0NFWE 3N~ 400V 50Hz
RWH‑6.0NFWE
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
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
at the interface point of
max
Z (Ω)
max
0.31
0.20
0.27
0.18
0.24
0.17
‑
0.38
‑
0.38
‑
0.38
Z (Ω)
max
0.31
0.21
0.27
0.19
0.24
0.17
‑
0.41
‑
0.41
‑
0.41
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