Precision Cooling for
Business-Critical Continuity™
Liebert HPM
Dual Circuit Floor Mount Chilled Water Units for High Redundancy
Redundancy To Secure Your Business
Liebert HPM R-type units are
dual circuit chilled water units
for business critical applications.
Equipped with two independent
chilled water circuits they are able
to take cooling fluid from two
independent sources.
The models are available in the
cooling capacity range 24 - 120
kW for each circuit; each equipped
with 3 or 2 Port valves. These units
provide additional security for your
critical environment. With primary
and secondary chilled water circuits
the units provide mandatory back
up in terms of cooling capacity.
Liebert HPM Dual CW Circuit
Hydraulic System Schematic
Liebert HPM Dual CW Circuit
units are specifically designed
for buildings with primary and
secondary chilled water circuits.
A typical application is for
polyfunctional buildings where
a larger cooling source operates
during the day, serving offices,
technology and datacentres; while
at night when cooling is only
required for the technology and
datacentres we can use a smaller
chilled water source, maximizing
obvious energy savings.
CW1
CW2
Availability
100% redundancy CW circuits
Dual CW circuits with double
power supply maximize
availability.
Flexibility
Simplified design layout:
power cables
condensate drain
supply/drain for humidifier
Secondary CW circuit can provide
additional cooling in the event of
increased heat loads
2
Low Total Cost of Ownership:
Reduced footprint compared to
two separate units
Lower investments in airconditioners
Lower cost for the installation
iCOM - Keep it under control
Control
The sophisticated control logic of the
units offers several options to satisfy the chilled water system requirements and valve management.
Parallel mode
The chilled water valve management and positions are the same
for both CW circuits.
Safe mode
First circuit and valve managed
utilizing 70% of proportional temperature band, and then
second valve starts to open (Requires same inlet fluid temperature on both circuits).
Alternate mode
With an external input to the iCOM
controller it is possible to manage
which of the two chilled water circuits / valves is duty and which is
standby.
In parallel and safe modes both CW
circuits can run together maximizing
the cooling capacity.
Liebert HPM R-type - Technical Data
Model
M241
upward
downward
M451
upward
downward
M601
upward
downward
L851
L111
L132
downward
downward
downward
Total cooling capacity at max airflow4
kW
24.8
48.4
63.5
86.1
108.1
127.4
Total cooling capacity4,6
kW
24.2
46.9
60.7
80.3
99.7
118.6
118.6
Sensible cooling capacity
kW
24
43.1
54
68.3
89.1
Water flow rate6
l/s
1.15
2.24
2.89
3.83
4.76
5.66
Number of fans
n
1
1
2
2
3
4
7050
11500
13900
17150
23900
32700
4,6
Air delivery
Max ESP downward/upward delivery
Sound pressure level5
m3/h
3
Pa
dB(A)
190/210
100/100
120/140
180
210
180
54.4
65.4
64
64.2
66.1
69.3
Width
mm
1000
1750
1750
2050
2550
3350
Depth
mm
850
850
850
850
850
850
Height
mm
1950
1950
1950
1950
1950
1950
kg
335
540
610
640
865
1020
Net weight
* All the data refer to: one circuit working and G4 air filter
* 20 Pa ESP for downward delivery version, 50 Pa ESP for upward delivery version
1
Air inlet @ 24° C, 50% RH, water in/out 7/12° C, ESP 20 Pa, G4 air filter
2
Air inlet @ 24° C, 45% RH, water in/out 7/12° C, ESP 20 Pa, G4 air filter
3
Max. ESP available for the indicated air delivery
4
For downward version
5
1.5 m height, 2 m front distance; free field; fan (s) working with indicated air delivery, downward delivery version.
6
At nominal/indicated air delivery
3
Ensuring the High Availability
Of Mission-Critical Data And Applications.
Emerson Network Power, a business of Emerson
Locations
(NYSE:EMR), is the global leader in enabling Business-Critical
Continuity™. The company is a trusted source of custom,
adaptive and ultra-reliable solutions designed to enable and protect
its customers’ business-critical technology infrastructures.
Backed by the largest global services organization in the industry,
Emerson Network Power offers a full range of innovative
power, precision cooling, connectivity and embedded
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Liebert Business
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marketing.emea@emersonnetworkpower.com
products and services for computer, communications, healthcare
and industrial systems. Key product brands within the
Emerson Network Power family include Liebert, Knürr, ASCO,
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Emerson Network Power - Service EMEA
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While every precaution has been taken to ensure the accuracy
and completeness of this literature, Liebert Corporation assumes no
responsibility and accepts no liability for damages resulting from use of
this information or for any errors or omissions.
©2008 Liebert Corporation
All rights reserved throughout the world. Specifications subject to change
without notice.
Liebert and the Liebert logo are registered trademarks of Liebert
Corporation. All names referred to are trademarks
or registered trademarks of their respective owners.
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