Hitachi SAMURAI CLG2, Manual, Page: 30 / 118

Installation
Technical Catalogue
TCGB0051 rev 0 - 09/2009
30
6.1. Electrical Wiring
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Tools and Instruments
One set of wiring tools and electrical tester (clamp meter)
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Schedule Check
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DANGER :
Switch OFF main interruptor (M.I) for any work inside Electrical Box.
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WARNING:
- Confirm that the field-selected electrical components (main power switch, fuses, wires, conduit connections, wire
terminals and others) are properly selected according to the “Electrical Data“ in this Technical Catalogue, and
ensure that they comply with national and local codes.
- It is recommended that the main power switch be locked in the “OFF“ position, to prevent against accidental supply
of power during equipment servicing.
- Check to ensure that an earthling wire is correctly connected to the unit. This wire protects from an electric shock.
Utilisation of an earth leakage breaker is necessary.
- Unit access must be restricted to the general public.
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Main Power Wiring Procedures
Confirm that electrical power is not being supplied to the installation location prior to any electrical installation
work.
1. Install the field-supplied main switch box(es) at a properly selected location.
2. Install conduit connectors in the hole for the power wiring.
3. Lead main power wires and the earthing wire through the connector to the screw terminals for main
power and earthing in the magnetic switch box. The neutral wires for 380V/50Hz and 415V/50Hz power
supply should also be led through the connector.
4. Firmly connect the wires with wire terminals to unit screw terminals R, S, T and N according to below
figure.
5. Connect the wires between the power source and the field-supplied magnetic switches.
6. Consider that the main power source will not be left turned OFF, easily, because it is necessary to
energise the oil heater even during unit stoppage.
N ° Name
1 Main Power/Terminal Board (R,S,T,N)
2 Electrical Box
3 Main Power Switch
4 Main Power Wiring
5 Earth Wiring
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Control Wiring
Connect the interlock wiring and control wiring between the unit terminals and the magnetic switches for the
water pumps, according to page or the wiring label. The main connection to terminal N is required.
380-415V/3~N/50Hz