Hitachi YUTAKI S80 Series - Unit Electrical Wiring and Connection; General Check

10. Electrical wiring
TCGB0075 rev.0 - 11/2012
114
10.1 Unit electrical wiring and connection
10.1.1 General check
1 Ensure that the eld-supplied electrical components (mains power switches, circuit breakers, wires, connectors and
wire terminals) have been properly selected according to the electrical data indicated. Make sure that they comply with
national and regional electrical codes.
2 Following the Council Directive 2004/108/EC(89/336/EEC), relating to electromagnetic compatibility, next table indi-
cates: Maximum permissible system impedance Zmax at the interface point of the user’s supply, in accordance with
EN61000-3-11.
Outdoor unit Z
max
(Ω) (*)
RAS-4HVRNME-AF 0.41
RAS-5HVRNME-AF 0.32
RAS-6HVRNME-AF 0.32
RAS-4HRNME-AF -
RAS-5HRNME-AF -
RAS-6HRNME-AF -
Model
Z
max
(Ω) Z
max
(Ω)
Indoor unit alone
(Without tank)
Indoor unit with
HITACHI tank
RAS-4HVRNME-AF 0.31 0.19
RAS-5HVRNME-AF 0.27 0.19
RAS-6HVRNME-AF 0.24 0.19
RAS-4HRNME-AF - 0.37
RAS-5HRNME-AF - 0.37
RAS-6HRNME-AF - 0.37
N O T E
(*) In case of outdoor unit three phases connection, Z
max
is not considered.
3 Harmonics situation of each model regarding IEC 61000-3-2 and IEC 61000-3-12 is as follows:
Models situation regarding IEC 61000-3-2
and IEC 61000-3-12 Ssc “xx”
Models
Ssc “xx”
(KVA)
Equipment complying with IEC 61000-3-2
(professional use)
RAS-4HRNME-AF
RAS-5HRNME-AF
RAS-6HRNME-AF
RWH-4.0FSVNFE
RWH-5.0FSVNFE
RWH-6.0FSVNFE
-
Equipment complying with IEC 61000-3-12
RAS-4HVRNME-AF
RAS-5HVRNME-AF
RAS-6HVRNME-AF
RWH-4.0FSNFE
RWH-5.0FSNFE
RWH-6.0FSNFE
-
4 Check to ensure that the power supply voltage is within +/-10% of the rated voltage.
5 Check to ensure that power supply has an impedance low enough to warranty not reduce the starting voltage more
than 85% of the rated voltage.
6 Check to ensure that the capacity of power supply is enough. If not, the compressor will be not able to operate because
of abnormal voltage drop at starting.
7 Check to ensure that the ground wire is connected.
8 Connect a fuse of specied capacity.
D A N G E R
• DonotconnectthepowersupplytotheindoorunitandDHWtankpriorllingofwaterbothcircuitsandchec-
king water pressure and the total absence of any water leak.
• Do not connect or adjust any wiring or connections unless the main power switch is OFF.
• Check that the earth wire is securely connected, tagged and locked in accordance with national and local
codes.
• Be sure to use a dedicated power circuit for the indoor unit. Never use a power circuit shared by another
appliance (Outdoor unit).