Chapter 4 Electrical Installation; Installation Notes; Wiring Of Indoor Unit; Locating Electrical Ports Of Indoor Unit - Emerson Liebert.PEX+ Series User Manual

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User manual (25 pages)

Table of Contents

Start electrical installation after mechanical installation is done. This chapter introduces the electrical installation of the

Liebert.PEX+ AC, including installation notes, and the wiring of indoor unit, and condenser power cables.

4.1 Installation Notes

1. The connection of all power cables, control cables and ground cables should comply with the local and national

electrician regulations.

2. The electrical installation and maintenance must be performed by authorized professional installation personnel.

3. See the unit nameplate for the full load current. The cable sizes should meet the local wiring rules.

4. Mains supply requirement: 380Vac (-10% to +15%), 50Hz, 3N~

5. If the soft power cable uses Y-connection, and if the cable is damaged, it must be replaced by professional service

personnel.

6. Before the wiring, use a voltmeter to measure the power supply voltage and make sure that the power supply has

been switched off.

7. The applicable grid for this air conditioner: TN, TT star connection power system; consult Emerson for other

connections.

8. A breaking device shall be provided to be disconnected from power supply.

4.2 Wiring Of Indoor Unit

4.2.1 Locating Electrical Ports Of Indoor Unit

The locations of the low voltage devices are visible after the front door of the electrical control box of the indoor unit is

opened, as shown in Figure 4-1.The distribution information of the detailed low voltage components shall be

differentiated according to the labels.

4.2.2 Connecting Power Cable Of Indoor Unit

The power connectors are located as shown in Figure 4-1. The enlarged view of power connector is as shown in

Figure 4-2, connect terminals L1 ~ L3, N, and PE respectively to their counterparts of external power supply. Reserve

some redundancy of the incoming cable and fix the cable to the cable clamp located on the inner side panel of the unit,

see Figure 4-1. For the cable specification, see the rated full load ampere (FLA) listed in Table 4-1.