Marketing brochure for Combi Cooler - compact liquid cooler built-in AHUs - unique solution for chilled beams.

1. Combi Cooler
Energy efficient cooling unit for air handling units

2. The unique, straightforward and energy efficient method
of generating cooling capacity for a chilled beam system
Fläkt Woods’ patent pending Combi Cooler provides completely new opportunities when planning and specifying
cooling systems. The Combi Cooler module can be integrated and mounted directly into the air handling unit. It
is particularly suitable for use together with chilled beam systems.
C ooling can be provided using chilled beams,
fancoils or ceiling-mounted cassette chilled
beams. Because the Combi Cooler replaces other
components, such as liquid coolers and external
condensers, the unit takes up little space. The Combi
Cooler is integrated into the air handling unit so all
components are located in the plant room, avoiding
outdoor or roof installation. Because the appear-
ance of a building is not changed, renovation work
is easier, and noisy condenser fans are not neces-
sary.

3. The Combi Cooler saves up to 40% energy
Systems using the Combi Cooler reduce energy consumption so that a cooling capacity of 100 kW is obtained
with 21.5 kW instead of 35 kW.
C limate change and energy consumption are our
shared responsibility. For many years, product
development at Fläkt Woods has aimed at constantly
WHAT MAKES THE COMBI COOLER SO ENERGY EFFICIENT?
1) The supply air to the air handling unit is only cooled
to 18°C instead of the 15°C in traditional systems. This
improving energy efficiency and indoor air quality. Our avoids energy-intensive condensation. Because the supply
e³ products and systems are a good example of our air temperature is slightly higher, areas such as empty
success. meeting rooms with no heat load, maintain a comfort-
Because location and design have a major impact on a able temperature, and unnecessary cooling is avoided.
building’s energy consumption we have given architects Electricity consumption is reduced by 14% (including the
and consultants a key to energy-efficient buildings. supplementary power used by the circuit for the chilled
Overheating problems can be reduced considerably beams).
by ensuring that the building’s windows are protected
from the sun. In business and office spaces, lighting, 2) Vigorous subcooling of the refrigerant and a higher
apparatus and people all represent a heat load. So for evaporation temperature reduce the energy required by
an even and comfortable room temperature of 21– 29%.
24°C, the need for energy for cooling is greater than
that for energy for heating. Supplementary cooling is The total energy saving is
100 - (0,71 x 0,86) x 100 = 39 %
necessary; and cooling can be achieved very economic-
ally using the Combi Cooler.

4. THE RESULT OF NEW APPROACHES IN THE PLAN- EQUAL COOLING CAPACITY WITH LESS
NING AND SPECIFYING OF COOLING SYSTEMS ENERGY CONSUMPTION
The supply air temperature is slightly higher than In practice, the annual energy required for cooling is
usual in the Combi Cooler, and most of the cooling halved when the supply air is cooled to 18°C instead
capacity enters the room through chilled beams. In of 15°C. While this does not reduce energy con-
traditional solutions the supply air temperature is sumption, because the chilled beams must generate
normally 15–16°C, while in solutions using the Com- more cooling capacity, the higher supply air temper-
bi Cooler it is 18°C. Using hotter supply air prevents ature prevents energy-intensive condensation.
air at too cold a temperature being carried into
areas where there is no heat load, such as empty
meeting rooms. At the same time, avoiding exces-
sive cooling of the supply air prevents unwelcome
and very energy-intensive condensation.
The Combi Cooler cools the supply air and
produces cold water for room-based cooling
Chilled Beam
Combi Cooler
Air handling unit
Cassette Chilled
Beam

5. AVOID OVERSIZING YOUR COOLING SYSTEM BY
USING THE ACON AIR HANDLING SELECTION TOOL
Taking the size of the room into account, it is easy to
dimension the cooling capacity of a system using a
Combi Cooler. Thanks to this the problem of oversiz-
ing the cooling capacity can be avoided. Using the air
handling selection tool ACON, a cooling system can
be designed to provide excellent efficiency. Because
maximum cooling capacity is only needed for 3–5%
of the time the system is operating, it is important
that the unit operates efficiently even when little cool-
ing capacity is required. The Combi Cooler has three
power stages, and the lower the power output, the
greater the efficiency of the cooling unit.
THE MODERN SOLUTION FOR VENTILATION COOLING
Fitted liquid cooler
Heating and cooling coil integrated into the supply air
One module, integrated into the air handling unit
Optimised for use with chilled beam systems
Less installation work indoors and no installation work outdoors
Greater operating reliability because all components are designed and sized to
work together
Easy commissioning as the unit is factory tested
Reduces the need for space in the plant room because the combi cooler only
has one cooling coil
No liquid cooler to install in the plant room
Fancoil
The air conditioning unit is only marginally longer despite all the cooling equip-
ment being built-in to it
No condensers on the roof to detract from the appearance of the building
– The perfect solution when refurbishing old buildings
Energy efficient solution

6. If you have a small or medium cooling requirement,
choose a Combi Cooler
Combi Cooler is suitable for buildings where the cooling need is max. 50 W/m2. This is often
enough for offices and business premises.
Offices Small industrial units Shopping centres
Refurbishment projects Business premises
Flow chart
Combi Cooler unit sizes
1
EU-33 2
3
1
EU-32 2
3
1
EU-31 2
3
1
EU-22 2
3
1
EU-21 2
3
0,5 1 2 4 3
m/s

7. Technical data
154
C
174
A
B
04
14
Unit size A B C Weight, kg
21 1104 1554 1548 648
22 1404 1854 1548 741
31 1404 1854 2148 1015
32 1704 2154 2148 1117
33 2004 2454 2148 1258
Unit size Air flow Cooling power kW Unit Output Refrigerant*
range Output variant
1 2 3 size variant Circ. 1 Circ. 2
21 0.8–1.4 23 30 36 21 1 5.5 8.5
21 2 5.5 9.5
22 1.2–1.8 33 39 46
21 3 6.5 11
31 1.6–2.8 46 57 69 22 1 7 12
32 2.4–3.6 63 74 85 22 2 9 13.5
22 3 9 15.5
33 2.8–4.2 79 90 102
31 1 9.5 16
31 2 10 17
31 3 10 17.5
32 1 11 19.5
32 2 11.5 19.5
32 3 11.5 21
33 1 12 22
33 2 13 22.5
33 3 14 23
*)
Refrigerator R134a

8. We Bring Air to Life
FläktWoods is a global Solutions for all your air climate and air movement needs
leader in air management. FläktWoods is providing solutions for ventilation and air climate for buildings as well as
We specialise in the design fan solutions for Industry and Infrastructure.
and manufacture of a wide
Air Handling Units (AHUs) Fans
range of air climate and air
Modular, compact and small Advanced axial, centrifugal and
movement solutions. And AHU units. Designed to ensure boxed fans for general and specialist
our collective experience optimisation of indoor air quality, applications. Comprehensive range
is unrivalled. operational performance and including high temperature and ATEX
service life. compliant options. Engineered for
energy efficiency andminimised life
Our constant aim is to Air Terminal Devices and Ducts cycle cost.
provide systems that Supply and exhaust diffusers and
precisely deliver required valves for installation on walls, ceiling Chillers
function and performance, or floor are all included in our large Air-cooled and water-cooled chillers
range and fit all types of applications. with cooling capacity up to 1800kW.
as well as maximise
Designed tominimise annual energy
energy efficiency. Chilled Beams consumption in all types of buildings.
Active induction beams for
ventilation, cooling and heating, Controls and drives
and passive convection beams Variable speed drives and control
for cooling. For suspended or systems, all tested to ensure total
flush-mounted ceiling installation – compatibility with our products.
andmulti-service configuration. Specialist teamcan advise on energy
With unique Comfort Control and saving and overall systemintegration.
Flow Pattern Control features.
© Copyright 2008 Fläkt Woods Group
Residential ventilation
A complete range of products for
residential ventilation. Consists of
ventilation units, exhaust air fans and
cooker hoods designed to optimise
indoor comfort and save energy.
FWG-Combi Cooler-EN-2009.05-8752
Fläkt Woods Group SA
18, avenue Louis Casaï, CH-1209 Geneva, Switzerland
Tel. +41 22 309 3800
email info@flaktwoods.com www.flaktwoods.com
See global web site for international
sales offices www.flaktwoods.com