Vertiv | Liebert CRV+ | User Manual 37
As soon as the mechanical installation has been implemented and completed accurately, then
the electrical installation of the product and its components can be carried out.
2.4 Electrical Installation
In this chapter, the electrical installation of the CRV+ air cooled units is explained in-depth to
help users get to grips with the various tasks which include the task introduction, notes, and
cable connections of the indoor unit apart from the checklist.
The air conditioners in the Liebert CRV+ series are professional devices used in industrial,
commercial, or other professional occasions. It is not tailored for the general public. The total
rating power is larger than 1 kW and is in with the IEC61000-3-12 standard. A port of less
than a 350 short circuit requires is required between the user power and the grid.
Permission is required from the power supply department to ensure that the air conditioner
is connected to a power no less than 350 circuit ratio.
2.4.1 On-site Wire connections
Following are the wires to have to be connected in/on the site:
Power cable and control cabinet of the indoor unit
Solenoid valve cable of the pipe extension kit (an optional requirement)
Outdoor unit (air-cooled), control Signal and Power cable
Input and Output control the cable of the unit
2.4.2 Installation Notes
The connections of all the power cables, control cab
les, and ground cables should be in
compliance with the local and national electrical regulations.
Observe the unit nameplate for the full load current. The cables sizes must meet the conditions as
specified in the local wiring protocols and rules.
Mains supply requirement: (380 to 415) V ± 10%; 50 Hz/60-Hz, 3N-
The power soft cable is a Y-type connection. If damaged, it has to be replaced immediately to
eliminate the dangers. The replacement procedure must be carried out by an authorized
professional or experienced service personnel.
The electrical installation and maintenance must be carried out by an authorized personnel or a
trained engineer well-versed with the inner workings of the electrical connection (For example,
service engineer from the manufacturer’s side).
Prior to the wiring, a voltmeter must be used to measure the power supply voltage and ensure that
the power supply has been switched off.
Use screws, guide rails, or other modes to fix the device firmly during the installation process to avoid
movement or shaking during the start-up or operation mode.
For the air conditioner configured with EC fans, the unit power grid adheres to the TN or TT star
connection power distribution system. However, if there is a need to configure another type of
power grid, contact the Vertivsupport team for the same.
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