Installation; Electrical Wiring - Hitachi RCUE40AG1 Installation, Operation And Maintenance Instructions

6. INSTALLATION

6.1. ELECTRICAL WIRING

"
Tools and Instruments
One Set of Wiring tools and Electrical Tester (Clamp Meter)
"
Schedule Check
"
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 Technical Catalogue 1, 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.
"
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 earthling wire through
the connector to the screw terminals for main power and
earthling in the magnetic switch box. The neutral wires
for 380/50 Hz and 415 V/50 Hz 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 Fig. 7.
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.
Fg.7. Main Power Wiring.
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
"
Control Wiring
Connect the interlock wiring and control wiring between the
unit terminals and the magnetic switches for the water
pumps, according to Fig. 8 or the wiring label. The main
connection to terminal N is required.
INSTALLATION
6
/11