4.1 Unit electrical wiring and connection
4.1.1 Wiring and main switch selection
Minimum size of the power supply cable wires
N O T E
• Follow local code and regulations to select the installation cables.
• The maximum current value is used to calculate the size of the cables in line with European Standard EN60
335-1. Use normal, flexible coated neoprene (polychloroprene) cables (code H05RN-F) with a diameter no less
than that indicated in the table.
• The size of the earth wire must be in line with local code IEC 245, no. 571.
• Use a shielded twisted pair cable or shielded pair cable with a diameter of over 0.75 mm
2
(equivalent to KPEV-
S) for the operation wiring between the outdoor and the indoor unit and for operation wiring between the indoor
units.
• Use a shielded twisted pair cable or shielded pair cable for communications between the indoor and outdoor
units. Connect the shielding to the earthing screw in the indoor unit electrical box.
If the power cables are connected in series, use the maximum current value and select the cables according to the following
tables.
• For indoor units:
Model Power supply
Max. current
(A)
Power supply cable size Transmission cable size
EN60 335-1 EN60 335-1
All indoor units
(*)
1 phase, 230 V, 50 Hz 5 0.75 mm
2
0.75 mm
2
(*)
Except RPI-(8.0/10.0)FSN2E
• For KPI units:
Model
Power supply Maximum current, (A)
Power supply cable size
(mm
2
)
Current I (A) Cable size (mm
2
) Current I (A) Cable size (mm
2
)
KPI-(252-802)E2E 1 phase, 230 V, 50 Hz 4 0.75
KPI-(1002-2002)E2E 1 phase, 230 V, 50 Hz 8 1
KPI-(3002)H2E 1 phase, 230 V, 50 Hz 12 1.5
Cable size in relation to current
N O T E
• Use shielded transmission cables between indoor and outdoor units.
• Use normal, flexible coated neoprene (polychloroprene) cables (code H05RN-F) with a diameter no less than
that indicated in the table.
• If the current exceeds 63 A, do not connect the cables in series.
4 Electrical wiring
112
SMGB0063 rev. 1 - 10/2010
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