Appearance; Main Components And Optional Features; Components Of Indoor Unit - Emerson Liebert.PEX+ Series User Manual

2 Chapter1 Overview

1.2 Appearance

Liebert.PEX+ appearance is shown in Figure 1-2 with P2080UA as an example.

1.3 Main Components and Optional Features

The components include indoor unit, condenser and remote monitoring software.

1.3.1 Components of Indoor Unit

The indoor unit includes compressor, evaporator, electronic expansion valve, infrared humidifier, DC speed-regulated
centrifugal fan ("EC fan" for short hereafter), electric heater, sight glass, filter drier and iCOM controller (Precision
Air-Conditioner controller). The descriptions of the components are given in Table 1-1.
Components
Compressor
Evaporator
Electronic
expansion valve
Infrared humidifier
Fan
Electric heater
Sight glass
iCOM
Controller
Filter drier
Table 1-1 Descriptions of main components of indoor unit

Highly effective Copeland scroll compressor is used, featuring low vibration, low noise and high
reliability.

The Rotalock (screw thread) connection mode makes the maintenance easier.

Adopt a fin-tube heat exchanger with high efficiency.

The distributor is designed and verified according to individual model to ensure that the refrigerant is
distributed evenly in each loop, improving the heat exchanger efficiency to a great extent.

The electronic expansion valve is very precise and accurate device which can react instantaneously
to any kind variation or abnormality occurs during air-conditioners working.

The infrared humidifier has a simple structure, which is easy for teardown, cleaning and maintenance.

Application of the infrared humidifier can reduce the dependence on water quality. It also features fast
startup, short humidifying time, large humidifying capacity and high humidifying efficiency.

PEX+ series use EC fan, which features high efficiency, energy-saving, space-saving and low noise.
 EC fan unit uses elaborate structure design, and the downflow unit uses the 'in-floor' design, which
positions the fan unit below the floor to further improve the efficiency of air supply.

The electric metal heater is used. It features fast heating speed and even heat and high reliability.

The sight glass is the window of the system cycle, for observing the refrigerant state, mainly the
moisture content of the system.When the moisture content exceeds the standard, the color will be
changed.

LCD screen with blue backlight and 128 × 64 pixels, or selects the large screen with 320 × 240 pixels

The multi-level password protection can effectively prevent unauthorized operation.

Self-recovery upon power failure

The operation time of main components is available through the menus.

The expert-level fault diagnosis system can display the current fault information automatically,
facilitating the maintenance.

It can store up to 400 historical event records.

There are two kinds of panels for option: one with common screen and the other with large screen

The filter drier eliminates the moisture effectively in the system, and also filtrates the impurities
generated during the long-term system operation so as to ensure normal system operation.
Liebert. PEX+Series Precision Air Conditioner
Figure 1-2 Appearance
Descriptions
User Manual