System Installation Illustration - Emerson Liebert PEX Series User Manual

10 Chapter 2 Mechanical Installation
Note
1. The contents in the dotted line boxes are the water-cooled unit and air-cooled unit condenser schematic diagram that divided
by the cooling mode of the refrigerant system. Select the corresponding pipe connection according to the actual type in use, the
dashed lines are for pipe connection at site, * components can be selected according to the actual requirements.
2. High pressure sensor is used for water-cooled or glycol-cooled unit only.
3. Single source cooling system does not contain the chilled water pipe system, and meanwhile, the low pressure sensor is
replaced with the low pressure switch on the side of the refrigerant.

2.3.2 System Installation Illustration

The installation modes of the air-cooled series unit are shown in Figure 2-8 and Figure 2-9.
Note
1. If the condenser is installed higher than the compressor (see Figure 2-8), a back bend should be fitted to the discharge line and
liquid line of the condenser, so as to prevent the liquid refrigerant from flowing back when the condenser stops.
2. The top end of the back bend must be installed higher than the highest copper pipe of the condenser.
Outdoor unit Back bend (higher than the highest copper pipe of condenser)
Liquid line (do not expose liquid line to sunshine)
Trap
Slope discharge
Sealed
Figure 2-8 Condenser installed higher than compressor
Liebert.PEX2 Series Air Conditioner User Manual
Indoor unit
Heat insulation floor Floor
Raised floor
Humidifier water in
Condensed water out Condensate drain
supply