APC INROOM ACPSC3000 Provozní pokyny stáhnout pdf (Strana 49)

InRoom CW/DX – Operating Instructions

(2.4)

536

(21.1)

6.4 Electrical connection

insertion for the power

supply cable

Electrical Hazard:

Disconnect all power sources before making electrical connections.

Only authorized personnel may connect electrical power.

This unit must be connected to earth ground.

The power supply system on site and the pre-fuses must be designed for the total current of the unit (see

technical data, beginning on page 24).

Route the electric cable into the electrics box from below and connect the three phases to the main switch,

the PE conductor at the PE rail and the neutral conductor at the neutral terminal, in accordance with the

wiring diagram (part of the unit documents).

Electrical Hazard:

The unit is designed for clockwise phase rotation.

The scroll compressor is dependent on correct phase rotation. The sense of rotation will be checked at

the factory before dispatch. On site, if the rotating ﬁ eld of the compressor is incorrect, it must be corrected

by changing two phases of the power supply at the isolator. An inverse rotating ﬁ eld can be detected by a

raised compressor noise level and can result in overheating and destruction of the compressor after several

hours of operation.

Electrical Hazard:

If using a Residual Current Device (RCD), take EN 50178 into account. Only type B pulse-

current FI circuit breakers are permitted. FI circuit breakers only provide equipment pro-

tection and are not intended to protect personnel.

Make sure that the power supply corresponds to the indications on the rating plate and that the

tolerances according to the "Application limits" are not exceeded.

In addition to this, the asymmetry of phase between the conductors may amount to 2% maximum.

The asymmetry of phase is determined by measuring the voltage difference between the phase

conductors. The average value of the voltage differences may not exceed 8 V.

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APC INROOM ACPSC3000 Provozní pokyny Strana 49