Rational iCombi Pro Original Installation Manual page 49

Only use power cables in accordance with the provisions of the NEC/
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NEMA.
Only connect the unit with copper cables. The cables must comply with the
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applicable regulations.
Colour coding of wires:
Note the colour coding of wires and local deviations.
Wire colour
Yellow/green
Blue
Brown, grey or black
Residual current circuit breaker
All units are generally equipped with a protective conductor terminal. It may
also be necessary to include a RCD residual current circuit breaker when in-
stalling the unit to comply with country-specific standards and regulations.
Unit size 6-1/1 GN to 20-2/1 GN
Connect the unit to a residual current circuit breaker according to the table
Power ratings of different voltage types [} 62].
Unit size 6-2/3 GN
Voltage forms with neutral ("NAC"): connect the unit to a residual current circuit
breaker according to the table Power ratings of different voltage types [} 62].
Voltage waveforms without neutral conductor ("AC"): Connect the unit to a re-
sidual current circuit breaker in accordance with the table Power ratings of dif-
ferent voltage types [} 62].
The power connection of the unit must be established so that the mains plug is
freely accessible and can be disconnected from the mains at any time.
Notes for standalone units
Maximum connection impedance at the grid connection point is 0.09 Ω.
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The cross-sections of the connection lines depend on current consumption
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and local regulations.
Notes for UltraVent/UltraVent Plus condensation hoods
For units with a condensation hood, both units must be disconnected from the
mains prior to servicing work.
Before you disconnect the power cord from the mains or reconnect it to the
mains, make sure that the unit is switched off to prevent the condensation hood
from running.
Notes for 6-2/3 GN units with a UltraVent/UltraVent Plus condensation hood
The condensation hood be connected to an electrical supply in line with ap-
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plicable standards (VDE and UL/CSA NEC regulations).
80.06.070_iCombiPro-iCombiClassic_IM_en-GB
6 | Electrical connection
Wire function
Protective conductor
Neutral conductor (neutral wire)
Phase L1, L2, L3
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