Precision Cooling for
Business-Critical Continuity
Liebert PeX with Digital Scroll
Efficiency And Reliability In A Compact Package
We Invented Precision Cooling
Emerson Network Power knows precision cooling. After all, we invented it back in 1965! Over
the years, our cooling systems have been proven as the world's standard for reliable operation.
In fact, there are Liebert precision cooling systems in the field that have been in constant use
for over 30 years. Installed in thousands of critical data centers around the world, our latest
precision cooling portfolio offers the highest efficiency without compromising reliability.
Understanding the 3 R's of Precision Cooling
Despite the claims of different vendors promoting their own, specialized solutions, there is no silver bullet when it comes to
precision cooling for every application. There is only the most appropriate cooling solution for your infrastructure, which may
or may not be appropriate for another. An understanding of each cooling design can help determine which cooling approach
and solution can best meet your business goals and infrastructure requirements.
Room Cooling
Row Cooling
Rack Cooling
While densities are climbing steadily, low
density facilities remain the norm.
Traditional room cooling uses precision
computer room air conditioners (CRAC) and
is the most appropriate solution for these
low density environments. The low
complexity, ease of deployment and
precision humidity and filtration control of
these systems has seen hundreds of
thousands of units deployed in critical
facilities across Asia, with more added every
day. Combined with a raised floor, CRACs
deliver the best value for money and
represents significant increased efficiency
over building or comfort cooling.
If energy efficiency is top concern, row
cooling can improve efficiency over the
standard room approach by more than 30
percent. It supports high density
applications by the utilization of cold aisle
containment. Row cooling with SmartAisle
can further improve efficiency and provide
uniform and predictable temperature and
humidity control to equipment with or
without raised floor.
One of the proven best practice approaches
to dealing high density heat issues is by
bringing cooling technologies closer to the
source of heat. Specialized precision cooling
solutions for racks can support ultra-highdensity applications, up to and above 30kW
per rack. This dedicated cooling approach
specifically cools a rack by providing the
best direct air flow intake of the critical
equipment.
While room cooling meets the specific
needs of a broad market there are times
when an alternative approach is required by
your business and infrastructure.
Addressing Efficiency, Density and Availability with
Emerson's Precision Cooling Profolio
0kW
5kW
10kW
>30kW
Heat Density
Liebert PEX
Room
Regardless of the dimensions of the
challenge be it lowering energy usage,
reducing space, high densities, or any
number of issues in the network and data
center environment, trust on Emerson
Network Power to match it up with a
solution! We have the right cooling
approach, technology and product to
match your cooling needs. Our full range of
cooling solutions are suitable to room, rack
and now cooling approaches and can work
together to create the most dynamic ultra
efficient network possible.
Rack
Liebert CRV
Row
Smart AisleTM
Room + (Rack) + (Row)
Rack
Ultra
Efficiency
Liebert XD
The Liebert PEX: More Than A Single Energy Efficient component
< The efficiency of the Liebert PEX is engineered into the product. Each component that
goes into the Liebert PEX is carefully tested to ensure that it will contribute to its
overall efficiency.
< All enhancements to energy efficiency are designed to reduce operating time of key
components and increase the Mean Time Between Failure.
200VA
Condenser
Fans
1,850
Watts
Controls
Compressors Evaporator Fan Condenser Fans Controls
< In addition to having components that are individually engineered to provide the best
efficiency, how these components work and interact with each other also contribute
to the energy savings you get with the Liebert PEX.
Evaporator
Fans
2,360
Watts
Compressors
10,290
Watts
When to select Room Cooling
< Low / Medium / High density environments
• In room / raised floor
< Open architecture
• Delivers filtration and humidity control
• Thermal Mass minimizes risk of thermal runaway
• Low complexity / ease of deployment
• Broad capacity range
• Redundancy / load sharing
• Widest choice of cooling mediums
< Suitable for Mega Data Centers
• For affordable and realistic redundancy
Energy Efficiency
System Supervision
and Management
Space Savings
Communications
and Monitoring
Multiple Configuraton
Improved Energy Efficiency
Digital Scroll
The exclusive Digital scroll compressor on Liebert PeX utilizes the latest technology to deliver precise & significantly high energy
efficiency. Emerson Precision Cooling units with Digital scroll technology actively manage achieving capacity modulation from 10
percent to 100 percent.
Copeland digital scroll combines the sturdiness of scroll compressor with capacity of operating with varying load. When the traffic
managed by the equipment faces sudden changes, the facility experiences thermal load peaks.
Scalable, the Liebert Digital Scroll automatically adjusts to yearly increases in heat load.
Digital Scroll Features:
< Capacity modulation from 10% to 100%
< Energy Saving with partial load
< Variable capacity compressor can improve efficiency at less than peak capacity / on part
load condition
< Quick adjustment with changing load
< Simple & Reliable mechanics
< Reduces power consumption as it modulates
< Eliminates traditional piston and valve that add weight & loss
< Better room temperature control
Loaded State
Unloaded State
High Efficiency
Energy Efficiency is the main objective in designing the Liebert PeX DS. The exclusive Digital scroll compressor on Liebert PeX
delivers precise operation & higher EER. Digital scroll compressor provides variable capacity modulation that enables output to
precisely match changing cooling demands. This approach is 30% more efficient than traditional practices.
When you Need Flexibility In Cooling
EC Fans
The innovative energy EC fan technology integrated with continuous speed control across the full operating range provides
greatest value to the end user.
The variable speed EC fan achieves wide range of air delivery & static pressure. They ensure correct air distribution even when the
facility expands.
EC fan can increase the air delivery to meet the demand of the new installed devices. EC motors feature a consumption of about
30% lower than the one by traditional AC motors.
Features and Benefits
< 30% less energy than average standard AC motor
< Backward curved, corrosion resistant aluminum fan impeller
< Electronically communicated motor, AC to DC conversion
< Direct driven with integrated electronics
< True soft start with inrush current lower than full load current
Infrared Humidifier
Maintaining a proper humidity in a room is as important as maintaining proper temperature. Improper humidity in a room can
cause static electricity if it is too dry or condensation if it is too moist. Liebert PeX DS utilizes an integrated humidification system
to provide the necessary level of moisture control.
Features & Benefits
< Fast, responsive, energy-efficient humidification
< Full capacity achieved in 5-6 seconds
< Particle free vapour into coil bypass air avoids condensation
< Auto flush cycle removes mineral deposits
< Lamps are not in contact with water
< Water quality has negligible effect on performance
Merging Cooling Technologies
The Liebert PEX becomes the ultimate solution by combing the most reliable cooling technologies in the industry
- The EC fan and Digital Scroll (DS) compressor technology. EC fan plays an integral role in the Liebert PEX by providing effective
capacity control while retaining high energy efficiency and low noise levels. The DS compressor technology in the Liebert PEX
enables superior room condition, humidity and temperature control by adapting to changing heat load and latent conditions.
Ensuring Availability
Proactive Control and Monitoring of Critical Systems
1
Energy Efficiency with Teamwork Mode
3
Easy Serviceability with Liebert iCOM
The Liebert iCOM-control system featured on the
Liebert PEX brings high-level supervision to multiple
units allowing them to work together as a single
system to optimize room performance.
Monitors all key system functions and reports to
alarm, if needed
2
Additional Views Available with large Graphic Display
The optional Large Graphic Display features a 320x240 dot matrix
backlit screen with helpful system and maintenance views. It allows you
to see the average operation of the “system” or all units that are
working together in Unit to Unit (U2U) Communication mode for
Teamwork or Lead/Lag from a centralized location.
Removable display makes servicing easier
Adaptive Monitoring:
Increase Availability and Reduce Support Costs
Adaptive monitoring technologies allow easy information
maneuverability to key resources, whether you need to integrate
critical system data with your Network Management System,
Building Management System or enable a Web browser interface.
Liebert's monitoring technology puts critical puts critical systems
information at the fingertips of support personal - wherever they
are - addressing the increasing concern for improved internal
communication between management groups surrounding a
data center.
Liebert PeXDS- The Advanced Cooling Technology
Trim Down the Power Consumption
Key Benefits Of Liebert PeXDS:
Example: A 25kW Unit Working At 60% of Heat Load
< Secure your IT investment:
With Digital Scroll achieve more
performance at a greater value for
money, reducing energy demand.
Digital Scroll deliver adaptive cooling
flow, heavily depending on the heat load
variations to always keep the precise
temperature level.
< Scalability and Efficiency:
Increasing dimension of your datacenter
or higher density will not force you to
further investment: the unit can in fact
adapt its performance to your growing
datacenter accordingly.
< Unique technology:
For competitive advantages without
comparison: never ending protection for
the IT infrastructure with the maximum
energy saving.
500000
Saving
Upto 30%
450000
Operating Cost Year
< Just-in-time Cooling:
At 24°C, 50% RH
Cost at Rs. 6/kWh
Energy Analysis
400000
350000
300000
250000
200000
150000
100000
Standard Unit
Liebert PeXDS
< EC Fan Effect
Higher Motor Efficiency
< Humidifier Effect
SHR=1, means No Need to Run
Humidifier
< COP & SHR Effect
Liebert PeX DS has higher
COP & SHR
Dynamic Capacity Cooling Technology
Managed by the iCOM control system, the combination of these technologies not only provides precise temperature control but
also provides relative humidity control without initially resorting to dehumidifying or humidifying. It helps lower operating costs
and reduces energy consumption by as much as 30 percent, compared to standard cooling solutions.
Space Optimization
Summary
Energy Efficiency
System Supervision and Management
< Digital Scroll Compressor for
highest efficiency
< Enhanced remote communications
and control with Liebert Intellislot card
< Infrared Humidifier for precise
humidity control
< Centralized Management with
Liebert Nforms software
< iCOM controller for optimized
room performance
< Enterprise Management with
Liebert SiteScan Web Software
Communications and Monitoring
Multiple Configurations
< Teamwork Mode allows units to
work together in rooms with
unbalanced loads
< Seven different configurations for
Upflow and Downflow units
< Configure for your specific needs
< Unit diary shares history with any
authorized users or service contacts
Space Savings
< 15% more kW per square meter
compared to industry average
< Requires nothing more than direct
from access
Liebert PEX: Energy Efficient Room Cooling Solution
Liebert PEX is the most accessible for the broadest range of business needs. It
represents a straight forward and effective solution to the majority of low to
medium density applications. It reliably services the thermal requirements of
critical data center equipment.
The solution requires nothing more than direct front access for installation and
routine servicing. This means that users can achieve 100% space utilization
around the unit and not suffer dead space caused by service access requirements
on the sides and rear.
Liebert PeX DS Technical Specifications
Technical Specifications Liebert PeX DS Downflow Units
Model Size
Rated Unit Performance R22-kW
24°C DB, 17.1°C WB, 50% RH
Total
Sensible
24°C DB, 16.4°C WB, 45% RH
Total
Sensible
Rated Unit Performance R407C-kW
24°C DB,17.1°C WB, 50% RH
Total
Sensible
24°C DB,16.4°C WB, 45% RH
Total
Sensible
Compressor Type
Qty
Fan Type
Qty
Air Flow (CFM)
Unit Dimensions- mm
Width
Depth
Height
Unit Weight- Kg
120
125
135
240
245
250
270
19.2
19.0
22.8
22.6
34.8
29.6
39.4
38.4
46.4
45.6
53.2
48.2
70.9
59.6
19.6
19.5
23.2
23.0
34.4
31.9
39.8
39.5
46.9
46.6
51.5
51.1
69.0
63.5
21.9
19.7
24.9
23.1
37.2
29.7
43.9
39.4
50.1
46.2
56.8
48.9
74.6
59.2
20.8
20.6
Digital
Scroll
1
Backward
Curved EC Fan
1
24.3
24.1
Digital
Scroll
1
Backward
Curved EC Fan
1
3800-4800
36.2
31.6
Digital
Scroll
1
Backward
Curved EC Fan
1
42.1
41.8
Digital
Scroll
2
Backward
Curved EC Fan
2
850
850
1950
296
850
850
1950
299
850
850
1950
328
1700
850
1950
512
1700
850
1950
516
1700
850
1950
551
1700
850
1950
577
48.9
55.0
48.6
52.1
Digital
Digital
Scroll
Scroll
2
2
Backward
Backward
Curved EC Fan
Curved EC Fan
2
2
7500-9350
73.1
63.1
Digital
Scroll
2
Backward
Curved EC Fan
2
Technical Specifications Liebert PeX DS Upflow Units
Model Size
Rated Unit Performance R22-kW
24°C DB, 17.1°C WB, 50% RH
Total
Sensible
24°C DB, 16.4°C WB, 45% RH
Total
Sensible
Rated Unit Performance R407C-kW
24°C DB,17.1°C WB, 50% RH
Total
Sensible
24°C DB,16.4°C WB, 45% RH
Total
Sensible
Compressor Type
Qty
Fan Type
Qty
Air Flow (CFM)
Unit Dimensions- mm
Width
Depth
Height
Unit Weight- Kg
120
125
135
240
245
250
270
19.2
19.0
22.9
22.2
34.7
29.0
39.4
38.4
46.0
44.4
52.4
46.9
70.0
58.0
19.6
19.5
22.9
22.7
34.4
31.2
39.8
39.5
46.4
46.1
51.0
50.2
68.9
62.1
21.9
19.7
24.9
22.6
37.2
29.2
43.9
39.4
50.0
45.1
56.1
47.6
74.4
57.9
20.8
20.6
Digital
Scroll
1
Backward
Curved EC Fan
1
23.9
23.7
Digital
Scroll
1
Backward
Curved EC Fan
1
3800-4500
36.2
30.9
Digital
Scroll
1
Backward
Curved EC Fan
1
42.1
41.8
Digital
Scroll
2
Backward
Curved EC Fan
2
850
850
1950
283
850
850
1950
286
850
850
1950
315
1700
850
1950
490
Note:
1. Gross capacity based on 45°C saturated condensing temperature, 25Pa ESP.
2. Technical data subject to change without prior notice due to continuos product development.
47.9
55.0
47.5
50.9
Digital
Digital
Scroll
Scroll
2
2
Backward
Backward
Curved EC Fan
Curved EC Fan
2
2
7500-9000
1700
850
1950
494
1700
850
1950
529
72.0
61.3
Digital
Scroll
2
Backward
Curved EC Fan
2
1700
850
1950
555
POWER PROTECTION
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Cabinet Services
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Services
Preventive
Maintenance
Telecom
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EF&I
Monitoring
Self-Monitoring Technology
24/7 Remote Monitoring Services
Country Office
Emerson Network Power (India) Private Ltd.
Plot No. C-20, Road No. 19, Wagle Estate,
Thane (w), Maharashtra - 400 604. India.
Tel.: 91-22-33154400
Fax: 91-22-25828358
Toll Free No 18002096070
Email: marketing.india@emerson.com
Voice of Customers UPS Awards 2004-05 for Product Line
& Customer Service Awards in IT, Telecom,
Large Enterprise & Hospitals and
Customer Service Leadership Award in BFSI
2007
R
Best IT Hardware Company
Maharashtra IT Award 2006-07
www.emersonnetworkpower.co.in
Emerson Network Power.
The global leader in enabling Business-Critical ContinuityTM.
AC Power
Connectivity
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Embedded Computing
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Monitoring
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Power Switching & Controls
Precision Cooling
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Services
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While every precaution has been taken to ensure accuracy and completeness in this brochure, Emerson Network Power assumes no responsibility, and disclaims all liability for damages resulting from use of this
information or for any errors or omissions.
For disposal of Batteries Please visit the below link:
http://www.cpcb.nic.in/divisionsofheadoffice/hwmd/lead.pdf
Note: Specifications & Features may vary based on the condition.
Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co. © 2010 Emerson Electric Co.
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