Weidi PEX machine room dedicated precision air conditioning

The Liebert PEX unit is a new generation precision air conditioning unit based on Emerson's global research and design platform. Emerson Liebert Precision Air Conditioning has been operating tens of thousands of units in computer, data center, and communication rooms since 1965

At present, various network related businesses are increasing day by day, and the losses caused by each business interruption are getting greater and greater. We need to spend more energy and support on infrastructure. The environmental foundation for the safe and stable operation of various devices is increasingly attracting our attention.
Liebert. PEX precision air conditioning units are designed for high sensible heat in electronic devices. They not only provide ideal temperature and humidity environments (temperature 20-25 ℃, relative humidity 40% -55%) for the equipment, but also avoid severe temperature fluctuations in the computer room under different working conditions.

The iCOM controller can control up to 32 air conditioning units on-site, and multiple control modes can be selected according to the on-site situation of the computer room to achieve energy saving and reduce the full life cost of the refrigeration system
Copeland scroll compressor, high energy efficiency ratio
EC fan, 20% more energy-efficient than ordinary fan
Far infrared humidifier, fast humidification response, constant humidification amount, low water temperature
V-shaped evaporator, which increases the heat transfer area in a limited space

Liebert. PEX: It's not about relying on a single energy-saving component to achieve high energy efficiency
The high energy efficiency ratio is an important characteristic of Liebert PEX. Every component used in Liebert. PEX undergoes rigorous testing to ensure overall energy efficiency
By reducing the working time of key components and increasing the mean time between failures (MTBF), we aim to further improve the efficiency and energy saving of the system
In addition to ensuring efficient operation of each individual component, the perfect coordination of these components to improve overall efficiency is also a design focus

The key to ensuring high efficiency of Liebert PEX
1 EC fan (optional)
EC fans can reduce fan input power without extreme adjustment of fan speed, reduce energy consumption and extend component life, providing the best operating environment for IT equipment.
2 digital scroll compressors (optional)
The use of digital vortex compressor technology can adjust the capacity within the range of 10% -100%. Featuring high reliability and the ability to flexibly adjust cooling output as needed, it reduces users' energy expenses.
3 iCOM controllers
The iCOM controller can achieve group operation mode, which is one of the features of Liebert PEX. It improves efficiency and optimizes the cooling performance of the data center by operating multiple units as a system.
4 Infrared Humidifiers
The application of infrared humidifiers in Liebert precision air conditioning systems has a history of 25 years and can adapt to various water quality. Its high efficiency, fast response, and clean humidification make it an industrial standard for high-precision, impurity free humidity control applications
5 Natural cooling function
The SDC intelligent dual cycle air conditioning unit that Weidi can choose from has two circulation systems. When the outdoor temperature is high, it runs the compressor cycle for cooling, and when the outdoor temperature is low, it runs the natural cooling cycle for cooling, with an energy-saving rate of over 40%. It is the most leading natural cooling solution in the industry.
6 Other energy-saving designs

Efficient fan system
EC fan
In addition to traditional fans, Liebert. PEX can also choose EC fans. The revolutionary EC fan technology adopts efficient and adjustable speed control motors, which can greatly reduce energy consumption and extend component life, providing maximum value to end users. The EC fan is controlled by a Liebert iCOM controller, which can provide the most suitable airflow for IT equipment to provide optimal operating conditions. For the lower air supply unit of the EC fan, a fan sinking design is adopted. During on-site installation, the EC fan is sunk to the floor, which can further reduce the energy consumption of the fan.
Features and benefits
The DC brushless motor used saves 10-20% energy compared to ordinary standard AC motors
Automatically adjust the fan speed according to cooling requirements or air pressure, and provide air volume as needed
Soft start function, low starting current

digital scroll compressor
In addition to traditional high-efficiency scroll compressors, Liebert. PEX units also have air conditioning units that use digital scroll compressors. The digital vortex compressor can adjust the cooling output within the range of 10% -100%, with good adaptability and scalability, and can automatically adjust for the increasing heat load every year.Under the management of iCOM control system, digital vortex technology has unique advantages in humidity control, which can greatly reduce the amount of humidification and save humidity control costs. Compared to standard digital scroll compressors, it reduces energy consumption by 30%.

Features and benefits
Save electricity at low loads, energy-efficient and efficient
Reduce the start stop cycle of the compressor and improve reliability
On demand cooling, more precise environmental control
Dynamic cooling, providing cooling capacity dynamically in response to changing loads
Low EMC, no harmonic interference

intelligentGroup control working mode
The iCOM controller can group control up to 32 air conditioning units, and the 32 units can be divided into multiple groups for operation. The iCOM controller can achieve backup and rotation functions between air conditioning units, ensuring the stable operation of the air conditioning system; Dynamically adjust the number of air conditioning units operating according to the load of the computer room, and coordinate the air conditioning units within the group to avoid competitive operation, achieving efficient operation of the air conditioning system. Dynamically adjust the operating quantity of air conditioning units according to the load of the computer room. When cooling is required in the computer room, the iCOM controller will automatically shut down units with local heating needs to avoid a competitive operating state of both heating and cooling at the same time.

Optional large screen graphic display controller

Spare parts list - Key spare part numbers are saved in the unit memory,It can be displayed on a large screen to accelerate the identification of parts

high reliability
Highly certified high-quality components
Advanced controllers automatically balance the operation and wear of components, extending the system's lifespan
A control system with expert self diagnosis and fault warning functions
The skeleton body riveted with carbon steel rivets is stable, sturdy, and easy to disassemble
Internal and external double-layer panels, with built-in fire-resistant and thermal insulation materials
Multiple protection measures such as high and low pressure of compressor, high temperature of exhaust, loss of air volume, and overload of fan

Liebert. PEX air-cooled unit outdoor condenser
Composed of stainless steel connectors and marine grade corrosion-resistant aluminum materials
Control of infinite speed regulating fan
Fan motors with extremely low maintenance requirements are suitable for various climatic conditions
Single/Dual Refrigeration Circuit Design