Chapter 3 Mechanical Installation; Installation Notes; System Installation Arrangement; Overall System Arrangement - Emerson Liebert.PEX+ Series User Manual

8 Chapter3 Mechanical Installation

Chapter 3 Mechanical Installation

To achieve the designed performance and maximize the product life, correct installation is vital. This chapter
introduces the installation notes, installation layout, installation procedures, piping and fan lowering operations.

3.1 Installation Notes

1. Prior to installation, be sure to read the whole contents of Chapter 2 Instructions for Installation Preparations, and
confirm that the installation positions have been confirmed according to the requirements of 2.2 .
2. Liebert.PEX+ air-cooled series air conditioner is designed for split floor installation. The indoor unit must be installed
on the floor of the equipment room or computer room, and the condenser can be installed outdoors or on the floor of
other rooms. The Liebert.PEX+ water-cooled air conditioner is designed for integrated floor installation. It should be
installed on the floor of the equipment room or computer room.
3. The selection, layout and fixing of the pipes shall comply with industrial standard.
4. Pressure drop, compressor oil return, noise reduction and vibration shall be considered in design and installation.
5. The unit shall be fixed by screws and mounting rails to avoid shaking during startup or operating processes.

3.2 System Installation Arrangement

3.2.1 Overall System Arrangement

The overall arrangement of Liebert.PEX+ series air conditioner is shown in Figure 3-1.
Oil trap
(mounted one for every
rise of 7.5m)
 Note
 The single system is used as an example to describe the double system.


 *: Components are not supplied by Emerson but are recommended for proper circuit operation and
maintenance.

+: Components are required when the equivalent length exceeds 30m.
Check valve
*
Thermal expansion valve
Dry filter
Solenoid
valve
Ball valve
Figure 3-1 Overall system arrangement
：Emerson piping.
：Field piping (by technicians).
Liebert. PEX+Series Precision Air Conditioner
Condenser coil
Sight glass
+
HP switch
Needle valve
Discharge pipe
Scroll compressor
Evaporator coil
distributor
Thermal sensing bulb
LP sensor
Suction pipe
Service valve
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