Electrical Connection Of Rci Units - Hitachi RCI Service Manual

4 Electrical wiring
Type of main switch
Select the main switch according to the following table:
Model
(*)
All indoor units
KPI-(502/802)E2E
1 alternating phase,
KPI-(1002)E2E
KPI-(1502/2002)E2E
KPI-(3002)H2E
(*)
Except RPI-(8.0/10.0)FSN2E

4.1.2 Electrical connection of RCI units

Work prior to the electrical connection
1 Turn off the power supply switches before starting work and fit the appropriate locks and safety warnings.
2 Wait 5 minutes after turning off the power supply switches.
3 Check that the fans on the indoor and outdoor units are at a standstill before starting work.
N O T E
• The electrical power for the unit must involve a specific power line, with an exclusive power control switch and
residual current breaker, installed in line with local or national safety regulations.
• Check that the electrical power line has enough capacity to supply the unit. Its length, the cable diameter and
their protection (sleeve or jacket) must be appropriate for the unit.
• For further information, always consider the current regulations in the country where the unit is to be installed.
C A U T I O N
• Risk of fire: cables must never touch the gas refrigerant pipes, printed circuit boards (PCB), sharp edges or
electrical components inside the unit to avoid damaging them.
• Loose connection terminals may lead to cable and terminal overheating. The unit may operate incorrectly,
leading to a risk of fire. Check that the cables are firmly secured to the connection terminals.
Electrical connection
Check that the power supply for the RCI indoor unit is 230 V. If not, replace the CN connectors on the TF transformers in
the electrical box.
Make the connection between the indoor unit and the air panel.
N O T E
• To prevent the screws from falling from the terminal strip, do not remove them completely, hold onto the
terminal and check that the screw is secure through the hole.
• Use the following screws for the terminal strip:
– M4 screw for the power supply.
– M3.5 screw for the communication line.
113
SMGB0063 rev. 1 - 10/2010
Power
Max. current (A)
supply
230 V, 50 Hz
Circuit breaker
(A)
5 6
4 6
8 10
8 16
12 16
Earth
leakage breaker (no. of
poles/A/mA)
2/40/30
4