Installation 26
2.4. Electrical Installation
In this section, the electrical installation of the AHU unit is explained in-depth to help to get familiar with the various tasks
such as the installation considerations, indoor wiring and the checklist.
2.4.1. Installation Precautions
The connection of all power cables, control cables, and ground cables should comply with the local and national electrical
regulations.
The electrical installation and maintenance must be performed by authorized professional/installation personnel.
See the unit name-plate for the full load current. The cable sizes should meet the local wiring rules.
Mains supply requirement: 380-415 V, 3Ph+N~50/60 Hz.
If the soft power cable uses Y-connection, and if the cable is damaged, it must be replaced by professional service personnel.
Before the wiring, use a volt-meter to measure the power supply voltage and ensure that the power supply has been
switched o.
The applicable grid for this air conditioner, TN, TT star connection power system; consult Vertiv local representative for
other connections.
A breaking device must be provided to disconnect the unit from power supply.
The short circuit breaking current of the unit is 6 kA.
Install suitable RCD according to the actual installation.
2.4.2. Wiring of AHU
The locations of the low voltage devices and high voltage devices are visible after opening the front door of the electrical
control box of the indoor unit, as shown in Figure 2-22. The distribution information of the detailed low voltage components
are dierentiated according to the labels.
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