Vertiv Liebert EFC 220, Liebert EFC 300, Liebert EFC 320, Liebert EFC 400, Liebert EFC 440 User manual

Liebert® EFC

from 100 to 450 kW

The Highly Eicient Indirect
Evaporative Freecooling Unit

Liebert® EFC from 100 to 450 kW

Vertiv™ brings together hardware, software, analytics and ongoing services to ensure its
customers’ vital applications run continuously, perform optimally and grow with their
business needs.

Vertiv solves the most important challenges facing today’s data centers, communication networks and commercial and industrial
facilities with a portfolio of power, cooling and IT infrastructure solutions and services that extends from the cloud to the edge of
the network.

Headquartered in Columbus, Ohio, USA, Vertiv employs around 20,000 people and does business in more than 130 countries.
For more information, and for the latest news and content from Vertiv, visit Vertiv.com.

Liebert® EFC, the Highly Eicient Indirect Evaporative Freecooling Solution

The Liebert EFC is equipped with the most advanced industry technology. The system includes indirect air-to-air heat exchange
and evaporative cooling technology all in one footprint. The Liebert EFC is capable of reducing air temperatures by leveraging on
the evaporative cooling principle.

The process involves the evaporation of water which, as a consequence, cools the surrounding air. Through this technology, the
Liebert EFC can thus achieve pPUE levels of 1.03 ensuring top energy eiciency, as well as minimized operating costs.

Liebert EFC 300Liebert EFC 220 Liebert EFC 320

Liebert EFC 400 Liebert EFC 440

2

Optimized Water
Consumption

Data Center
Freefrom
Contaminations

1.03

Top Energy
Eiciency Levels
pPUE down to 1.03

<

Reduced Electrical
Infrastructure

$

Reduced
Capital Cost

Technical
Expertise

Supplying indirect freecooling for data center applications

via the evaporative technology.

3

Liebert® EFC from 100 to 450 kW

Liebert® EFC: Enhancing Data Center Eiciency

Evaporative Cooling

The highly eicient evaporative system
sprays water onto the heat exchanger to
enable cooling even at high ambient air
temperatures, without the need for
mechanical cooling.

Highly Eicient EC Fans

The new generation of fans installed in
the Liebert EFC dramatically reduce the
noise level and increase the overall
eiciency of the unit.

Reduced CO2 Emissions

At pPUE levels of 1.03, Liebert EFC
requires minimum power input
consequently reducing CO2 emissions.

Energy Eiciency

The evaporative cooling technology
enables Liebert EFC to reach pPUE
levels as low as 1.03.

Eurovent Certified Heat Exchanger

Eurovent certification guarantees that
Liebert EFC heat exchangers undergo
independent testing, thus delivering
rating accuracy and enhancing the unit's
reliability.

Freecooling

Evaporative cooling extends indirect
freecooling operation all year round.

Data Center Free from
Contaminations

The air-to-air heat exchanger separates
external and internal air, protecting the
data center air from bacterial
contamination, as well as other external
events such as fire and pollution.

Liebert® iCOM™

Liebert® iCOM™ Control ensures high level
management of the units to work together
as a single system, thus optimizing room
temperature and airflow.

Integrated Chilled Water Coil and
Direct Expansion System

These technologies ensure the unit's
operation even in climates characterized
by extreme humidity levels or severe
temperature peaks.

Partial Load Eiciency

New generation EC fans and integrated
digital scroll compressors contribute to
achieving the highest eiciency levels at
partial load.

4

The evaporative system has a dedicated internal pump that provides the water needed.

Water is sprayed through special nozzles onto the heat exchanger and evaporates, thus humidifying and cooling the air.

5

Liebert® EFC from 100 to 450 kW

Temperature (°C)

%

%

Absolute Humidity (g/kg)

35 40 45 50 55

Ensuring Top Eiciency Levels through the Evaporative Principle

The Liebert® EFC combines the capabilities of freecooling and evaporative cooling principles in one single unit. It has been
specifically designed to select the most appropriate operating mode based on the external environment conditions,
leveraging both principles in order to deliver significant energy savings.

The use of the evaporative cooling,
hence using cold external air as a means
of cooling, allows freecooling operation
to be maximized and compressor-related
cooling to be reduced to a minimum,
thus optimizing operating costs.

30

25

The evaporative principle uses air to
absorb water that is sprayed through
special nozzles onto the heat exchanger.
Water evaporation, thus removes heat
from the air and cools the outside air
temperature.

30

Outside air consequently transitions
from Dry Bulb Temperature to Wet Bulb
Temperature (the graph below shows
the transition from 35°C to 20°C).

100% 90%80% 70%60% 50%40%

30

20

15

10

25

20

15

10

5

5

-5

0

50-5-10 10 15 20 25 30 35 40 45 50 55

( 35°C DB ; 20°C WB )

Psychrometric Chart for Sea-Level Elevation

20

10%

6

Where Indirect Evaporative Cooling Works

In order to optimize the overall system eiciency, the Liebert® EFC has been designed to change its operation mode
according to the external environment. When the external air is cold enough to allow freecooling, the unit works in dry
operation mode (winter operation mode).

When ambient temperatures are higher,
also external humidity determines unit
capacity and performances as the
evaporative eect is directly associated
to the external air capacity to absorb
water.

When the unit operates in environments
with higher temperature and lower
relative humidity (summer operation
mode), Liebert EFC works in evaporative
(wet) mode.

In climates featuring high levels of
humidity the unit may thus require the
integration of a Direct Expansion (DX)
system or the installation of a Chilled
Water (CW) coil (extreme operation
mo de).

DRY OPERATION

(Dry Bulb Temperature

<17°C -20°C)*

The unit can cool the data center

solely via the air-to-air heat
exchanger, thus using only cold
external air.

WET OPERATION

(Wet Bulb Temperature

<20°C - 22°C)*

The unit can leverage the

evaporative eect via humidification.

DX/CW

INTEGRATION

WET

DRY

OPERATION

Dry Bulb Temperature, °C

*Assumptions: data center 36°C 24° C - 100% of full load per unit (redundancy operation)

OPERATION

DX/CW

INTEGRATION

External humidity assumes a key role
in determining unit performances:

Moisture Content, kg/kg Dry Air

y At 24°C and 90% relative

humidity, the unit may require
DX/CW integration.

y At 35°C (higher temperature)

and 25% (lower relative
humidity), the unit can solely
operate with evaporative
cooling.

7

Liebert® EFC from 100 to 450 kW

DC Hot
Return Air

DC Supply Air

Externel Air

Exhaust
External Air

DC Hot
Return Air

Externel Air

DC Hot
Return Air

DC Supply Air

Externel Air

Exhaust
External Air

Liebert® EFC Operation Modes In Detail

Winter

The use of the evaporative cooling,
hence using cold external air as a means
of cooling, allows freecooling operation
to be maximized and compressor-related
cooling to be reduced to a minimum,
thus optimizing operating costs.

DC Hot
Return Air

Externel Air

Exhaust
External Air

DC Supply Air

DRY OPERATION

Air-to-Air Heat Exchange
Without Spraying Water

Summer

During the warm season (summer
operation mode) the evaporative system
must run in order to saturate the air.
Thisenables the unit to cool the data
center air even with high external air
temperatures. By saturating the air, the
dry bulb temperature can be reduced.

Optional

In case of extreme external conditions,
a Direct Expansion (DX) system is
available to provide additional cooling.
As an alternative, the Chilled Water (CW)
coil can be installed. DX and CW
systems are sized to provide partial back
up for the overall cooling load and are
designed to provide maximum eiciency
with minimum energy consumption.

DC Hot
Return Air

Externel Air

DC Hot
Return Air

Externel Air

Exhaust
External Air

Exhaust
External Air

DC Supply Air

DC Supply Air

WET OPERATION

Air-to-Air Heat Exchange Via
the Spraying of Water to the
External Air Side

DX/CW INTEGRATION

External Air Is too Hot to
Achieve 100% Cooling with
Adiabatic, the DX Module Is
thus Integrated to Cover the
Missing Capacity

8

The State-of-the-Art Liebert® iCOM™ Control

50-5-10 10 15 20 25 30 35 40 45 50 55

Temperature (°C) in the Data Center

100%90% 8 0% 70% 60% 50% 40%

30%

20%

10%

5

10

15

20

25

30

Absolute Humidity (g/kg) in the Data Center

2004

ASHRAE

Recommended

2011

ASHRAE

Recommended

A1

A2

A3

A4

Precise, User-friendly Information at Unit Level

To guarantee ASHRAE

recommended guidelines even
at extreme conditions

y Extreme Winter Operation

(i.e.below-20°C) can cause the
unit's unrequired internal
dehumidification causing it to
exceed ASHRAE
recommended minimum
humidity. Liebert® EFC oers a
constant control of data center
air via its integrated Liebert®
iCOM™ control logic, ensuring
dew point temperature is lower
than heat exchanger surface
temperature, thus avoiding
unrequired dehumidification.

To provide precise temperature

and airflow control in front of
servers

y The Vertiv SmartAisle™ control

logic embedded in the Liebert®
iCOM™ optimizes internal air
volumes and temperatures
according to specific server
needs. VertivSmartAisle logic
allows Liebert EFC to exactly
match the servers' airflow
needs, ensuring that not even
a single Watt is wasted in
moving or cooling unrequired
air.

To optimize water and

electricity costs with the Cost
Function software feature

y The user friendly Liebert®

iCOM™ Control exploits the
management of energy and
water also at teamwork level.

The system collects

information from the dierent
units’ key parameters and
operating modes (dry, wet and
DX/CW) while taking into
account water and electricity
costs. The control predictively
calculates and then
implements the combination
which optimizes operating
costs.

Utmost Eiciency Even at the Data Center System Level

The Liebert® iCOM™ Control manages the operation of the Liebert EFC units, in order to ensure top reliability in all conditions.
Accessto the units installed in the data center, is granted through the Ethernet connection, that is capable of coordinating the
multiple on-site installations. The high-level supervision of multiple units allows these to work together as a single system, thus
optimizing overall system performance.

9

Liebert® EFC from 100 to 450 kW

High Flexibility Matching Customer Needs

The Liebert® EFC delivers substantial reductions and savings in terms of electrical infrastructure and equipment. With the
unit being installed externally, the available internal white space is maximized ensuring ease of system installation.
All of these features significantly reduce data center TCO.

Main Options Available Benefits

Water storage reduction

DX or CW coil for mechanical cooling integration

G4 or M5 data center air filter State-of-the-art filtration class

Low ambient kit To avoid unrequired dehumidification at very low ambient temperatures

Automatic transfer switch with intelligent controller Due to the communication with the unit control, all the electrical power data is monitored through the BMS

Dehumidification availability

Premium efficiency

Delivery temperature guaranteed also under the worst ambient conditions

UltraCapacitor Control always active even during a power failure

Monitoring Integrated BMS interface (i.e. ModBus, Bacnet and SNMP)

Energy meter/water meter To manage energy and water consumption, thus optimizing operating costs

Right and left versions available in both perimeter
and roof configurations

Perimeter Configuration Roof Configuration

To adapt to any data center layout

Multi-Storey Configuration

10

Annual Distribution of Operating Modes with Indirect Evaporative Freecooling

600

Hours per Year

Hours per Year

Hours per Year

Ambient Air Temperature

While respecting ASHRAE guidelines,
the Liebert® EFC unit can be installed
not only in cold climates, where the unit
can leverage on the dry operating mode,
but also in hotter ones (as shown in the
example below for Istanbul) where DX
operation is reduced to a minimum and
used only during extreme temperature
peaks that may be experienced
throughout the year. This results in
asignificant reduction in electrical
consumption possible even at full load
(reaching the highest possible savings at
partial loads).

The Liebert EFC Cost Function
optimizes running costs (water and
electricity), and according to the external
dry bulb and heat load, selects the most
convenient working mode (i.e. dry vs.
wet). With the same logic, the Cost
Function will also optimize the use of the
optional Direct Expansion (DX) mode.

550
500
450
400
350
300
250
200
150
100

50

0

-20 -10 01020304050

600
550
500
450
400
350
300
250
200
150
100

50

0

-20 -10 01020304050

600
550
500
450
400
350
300
250
200
150
100

50

0

-20 -10 01020304050

Ambient Air Temperature

Ambient Air Temperature

London

45% dry mode
45% dry or wet mode

(cost function)

10% wet mode

Frankfurt

48% dry mode
36% dry or wet mode

(cost function)

16% wet mode

Istanbul

31% dry mode
33% dry or wet mode

(cost function)
34% wet mode

2% wet + DX mode

Technical Specifications

Model EFC 220 EFC 300 EFC 320 EFC 400 EFC 440

Net Cooling Capacity 1 kW 203 373 385 425 418

FANS n° 4+4 9+9 9+6 9+6 9+8

Maximum Airflow - Data Center Side

Max Wet Bulb - Adiabatic Effect Only

Max Wet Bulb - Adiabatic + DX Effect

Adiabaitic Capability High High+ Medium Medium High

DX Capability Ratio High Medium Medium High High+

2

m3/h 52.500 97.000 100.000 110.000 107.500

3

°C 21,2 21,8 16,9 19,5 20,4

3

°C 29,0 26,2 22,9 26,5 28,6

Dimensions

Length mm 4000 4500 3650 3650 4620

Depth mm 2300 2900 2900 3400 3400

Height mm 4050 4700 4700 4700 4600

1

Return air temperature: 36°C RH=25%; Supply air temperature: 24°C - considering maximum airflow condition below.

2

ESP = 0 Pa data center and process side.

3

Maximum wet bulb temperatures to provide the above net cooling capacities.

11

Liebert® EFC from 100 to 450 kW

Vertiv™ LIFE™ Services Remote Diagnostic and Preventive Monitoring

Vertiv's service program is designed to ensure that your critical power protection system is maintained in an optimum
state of readiness at all times.

The Vertiv™ LIFE™ Services Remote
Diagnostic and Preventive Monitoring
provides early warning of UPS conditions
and out of tolerances. This allows
eective proactive maintenance, fast
incident response and remote trouble
shooting, giving customers complete
security and peace of mind.
With Vertiv LIFE Services you will
benefit from:

Uptime Assurance

Constant monitoring of UPS parameters,
thus maximizing the system’s availability.

First Time Fix Rate

Pro-active monitoring and data
measuring ensure that when our

customer engineers are dispatched
on-site, they arrive prepared for first time
resolution.

Proactive Analysis

From Vertiv LIFE Services centers, our
experts proactively analyze the data and
trends of your equipment, to recommend
a ctions to ensure their best
performance.

Minimized Total Cost of Ownership
of Your Equipment

The continuous monitoring of all relevant
parameters in turn maximizes unit
performance, reduces on-site
maintenance and extends the life of
your equipment.

Fast Incident Response

Vertiv LIFE Services allows for

immediate definition of the best course
of action, as a result of the regular
communication between your Liebert®
EFC unit and our Vertiv LIFE Services
centers.Reporting

You will receive a comprehensive report
detailing the working order of your
equipment and its operational
performance.

Reporting

You will receive a comprehensive report
detailing the working order of your
equipment and its operational
performance.

12

Customer Experience Center

Thermal Management

Vertiv’s Customer Experience Center
located in Tognana (Padova - Italy), is
specifically designed for customers to
interact with Thermal Management data
center technologies.

The center gives our customers the
unique opportunity to witness
pre-installation demonstrations, covering
technical performance, interoperability
and eiciency of Thermal Management
solutions under a broad range of real
field conditions.

Customers visiting the center may also
benefit from a comprehensive
consultation from our R&D, engineering
and application specialists.

Evaporative Cooling Validation Area

Our Thermal Management Customer
Experience Center features a dedicated
area to test the state-of-the-art Liebert®
EFC unit.

The scope of the Evaporative Cooling
Validation Area is to provide customers,
consultants and data center specialists
with the most complete testing area to
experience the capabilities of our
evaporative technology at peak
conditions.

Testing parameters include IT loads up
to450 kW and an airflow of up to
120,000 m3 per hour, replicating typical
peak conditions across the EMEA region,
and an exceptional performance
measurement accuracy within a +/- 5%
maximum tolerance and a +/- 2% airflow
tolerance. Airflow rate is also measured
at the outlet side using calibrated intake
nozzles in compliance with ANSI-AMCA
210/07 and ISO5801.

measurements are in line with the
metrological laboratories’ standards
(Accredia/EA/ILAC) and that our
equipment precision level is also
compliant with the European EN14511
standard.

Every customer visit is accompanied by
a complete final report which includes

each and every tested parameter.
Customers are guided through a first­hand experience with full transparency
and flexibility enabling them to achieve
the highest standards of technical
excellence.

All our measuring tools are also
periodically tested to adhere to the
current international quality procedure
ISO9001. This guarantees that all our

13

Liebert® EFC from 100 to 450 kW

Thermal Management Data Center Infrastructure for Small and Large Applications

Liebert® HPC

Wide range of high eiciency Freecooling Chillers
from 40 kW to 1600 kW

• Designed specifically for data center applications

and to work with Vertiv™ SmartAisle™

• Premium energy eiciency version

• Unique control capabilities with the Liebert® iCOM™

Control.

Liebert® HPM

Room cooling air
conditioners available
from 4 to 30 kW

Liebert® PDX
Liebert® PCW

Available from 5-220 kW

• Premium energy eiciency

• Eurovent certified

performance

• Unique control capabilities

with the Liebert® iCOM™

Control

• Liebert EconoPhase™

available for the direct

expansion system and inverter
driven compressors models.

Liebert® EFC

Indirect evaporative freecooling unit leveraging on
data center know-how. Available from 100 to 450 kW

• Unique control capabilities optimizing water and

energy costs

• Substantial reductions and savings in terms of

electrical infrastructure.

14

14

Liebert® AFC

The Adiabatic Freecooling Chiller available
from 500-1700 kW

• Integrated adiabatic pad system

• High freecooling capacity

• 100% compressor back up.

Service and Software

Solutions

Vertiv™ supports any application with

an extensive service oering
including installation, start-up,
commissioning, maintenance,
replacements, 24/7 remote
monitoring and diagnostics and
much more.

Our remote diagnostics and
preventive monitoring LIFE Service is
adding value providing actual
information to take decisions, as it
allows early detection of anomalies
and immediate reaction in case of
alarms.

Vertiv™ SmartAisle™

• Aisle containment

• Provides highest energy eiciency

• Works with any Liebert Thermal

• Management unit.

Liebert® HPW

High performance wall mount
outdoor package cooling system
from 5 to 5 kW.

Liebert® HPS

Split system from 5 to 4 kW
including an indoor evaporating
unit and an outdoor
compressorized condenser.

Liebert® HPF

Floor-mount package indoor
cooling system from 5 to 5 kW.

15

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MKA4L0UKEFCAR Rev. 5-06/2020