Vertiv | Liebert PEX+ Chilled Water | User Manual 5
Product Overview
The indoor unit includes Compressor, Evaporator, Electronic Expansion Valve (EEV), Infrared Humidifier, EC Fan,
Electrical Heating, Sight Glass, Filter Dryer, and iCOM Controller.
1.4.1. Cabinet
The cabinet frame is constructed from 2.5 mm, 2.0 mm and 1.2 mm folded galvanized steel. The exterior panels
are constructed from 1.2mm zinc coated sheet of steel and insulated with foam insulation. The cabinet is powder
coated in Charcoal Grey color and has a textured finish. The hinged front doors can be removed, and includes
captive 1/4 turn fasteners.
1.4.2. EC Fans
The EC Fans used in the Liebert® PEX+CW models are energy-eicient and innovative with integrated
electronics and a maintenance-free design.
• Ability to regulate the airflow and reduce the fan input power leading to high energy-eiciency.
• Easy-to-connect facility with minimum wiring leading to a high performance with a great variety of possible
airflow rates.
Figure 1-3 EC Fan
1.4.3. Infrared Humidifier
The infrared humidifier consists of infrared humidifier lamp, water injection valve, humidifier water dish,
temperature alarm protection devices and water level alarm device.
The infrared humidifier in the Liebert PEX+CW series provides quicker and more responsive operation which is
quite important for mission-critical applications. The humidifiers reduce the dependency of water quality and
simultaneously achieve full capacity in quick time using almost any water quality.
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