Overview
1
1 Overview
This chapter introduces the product description, model description, product appearance and main components of
Vertiv
™
Liebert® XDC High Heat Density Precision Air Conditioner (hereafter referred as Liebert XDC). The Liebert XDC is
a specially engineered equipment for the applications which does not permit any unauthorized and unqualified access in
the system. It must be used only by professionally trained personnel if it is placed in shopping malls, light industry, or any
business environment.
1.1. Product Introduction
The Liebert XDC main unit is a large, multi-connected precision environmental control equipment, suitable for the
environment control of medium and large computer rooms, modular computer rooms and similar ecosystem that also calls
for energy-saving, high heat density and reliability requirements. It is specifically designed to ensure precision equipment
such as sensitive equipment, industrial process equipment, communication equipment and computers have a reasonable
and safe operating environment.
Liebert XDC is highly effective and efficient in solving the problem of heat dissipation in server rooms with high heat density,
and it is installed where cooling load changes drastically.
It is also configured with Vertiv™ Liebert® XD multi-connected air conditioners with the following features
1.1.1. Energy Saving
The Liebert XDC main unit adopts a high-efficiency variable capacity compressor, and Liebert XD terminal adopts high-
efficiency EC fan, high-precision electronic expansion valve control device. The Liebert XD terminal has three types:
Vertiv
™
Liebert® XDH, Vertiv
™
Liebert® XDV, and Vertiv™ Liebert® XDO, which can be flexibly selected for different
application environments. It is placed close to the server, reducing the air supply distance; improving efficiency and energy
saving.
The unit provides real-time compressor operating status, terminal operating status, indoor ambient temperature, outdoor
ambient temperature, outdoor fan running status, etc., and also enable to adjust the status of each operating component of
the system in real time to make the system run in the most energy-saving state. The XD multi-connected air conditioning
system has a new PID optimization algorithm that significantly improves the energy efficiency ratio of the system under
different compressor outputs. The system energy efficiency comparison between Liebert XD multi-connected air
conditioner and traditional computer room air conditioner is shown in
Figure 1-1 System Optimization Algorithm Comparison
