Chapter 3 Electrical Installation 23
Liebert_DM 16kW Air Conditioner User Manual
Chapter 3 Electrical Installation
This chapter introduces the electrical installation of the Liebert_DM 16kW air conditioner, which includes work
introduction, installation notes, wiring of indoor unit, connecting power cables for outdoor unit and installation
inspection.
3.1 Work Introduction And Notes
Wires to connect on-site
1. The power cable of indoor unit.
2. Outdoor unit (air-cooled): standard signal cable.
3. Input and output control cables.
Notes
1. The connection of all power cables, control cables and ground cables should comply with local electrician
regulations.
2. See the equipment nameplate for the full load current. The cable sizes should meet the local wiring rules.
3. Mains supply requirement: 380Vac, 50Hz.
4. The electrical installation must be completed by trained personnel.
5. Before the wiring, use a multimeter to measure the power supply voltage and make sure that the power supply has
been switched off.
3.2 Wiring Of Indoor Unit
3.2.1 Locating Electrical Interface Of Indoor Unit
Open the front door of the indoor unit, and you will see the interfaces of the electrical control box, as shown in Figure
3-1.
电源接口
N/PE
端子排
控制接口
Power interface
Control interface
N/PE terminal block
Figure 3-1 Interfaces of electrical control box of one-bay system
3.2.2 Connecting Power Cable Of Indoor Unit
The power interfaces are located as shown in Figure 3-1, Figure 3-2 and Figure 3-3. The power interface is amplified
as shown in Figure 3-4. Connect terminals L1 ~ L3, N, and PE to their counterparts of external power supply.
Fix the input cables to the cable clamp, as shown in Figure 3-5. As for the cable specification, see the unit maximum
operation current in Table 3-1.
