STULZ – THE NATURAL CHOICE 1

Free Cooling

...save energy & reduce your costs

STULZ – THE NATURAL CHOICE 2

Regions of the world for Free Cooling

STULZ – THE NATURAL CHOICE 3

Dynamic Free cooling

...for your data centres and switches

STULZ – THE NATURAL CHOICE 4

Free cooling Retrofit principle for Shelters

Overpressure grills

STULZ Free AirFixation on the wall

Fresh air inletFrom the bottom side

Hot air outlet

Air inlet grill

STULZ – THE NATURAL CHOICE 5

Freecooling challenge

For BTS sites equipped with split comfort

Reduction of the operating cost

Total control of existing split comfort unit

Use the full potential of Energy-saving

Reduction of the Carbone footprint

STULZ – THE NATURAL CHOICE 6

Intelligent system and control

Existing Air con /ShelterExisting Air con /Shelter

IncludingRemote control on/off and alarms Add Free cooling BoxAdd Free cooling Box

STULZ – THE NATURAL CHOICE 7

STULZ Free Air : Description

One single frame (600x640x600 mm)

Cooling capacity until 6000W

Power supply = 48VDC

Electronic control

Control and management of comfort split

Variable speed control of EC fan:

1. Low noise emission

2. Reduction of power consumption

Main technical features

* With DT=10°C

Free cooling Box

STULZ – THE NATURAL CHOICE 8

Standard Intelligence

System intelligence includes:

Take over of the whole system control

through Microprocessor controller

Remote control on/off incl. alarms

Monitoring system

probes for monitoring split comfort (with

3,5MT cable)

screw terminals for digital inputs (on/off

split unit) and outputs (up to 9 alarms)

48VDC modulating FCB-fan

Airflow and clogged filter signal

STULZ – THE NATURAL CHOICE 9

Airflow automatically adjustable with outdoor temp

Power consumptions and Sound Pressure level on DT°

0,00

10,00

20,00

30,00

40,00

50,00

60,00

70,00

80,00

90,00

100,00

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

DT° (Inside/outside difference temperature)

Po

we

r c

on

su

mp

tio

ns

W

30

32

34

36

38

40

42

44

46

48

So

un

d P

res

su

re L

ev

el-

1 m

t.

Db

(A)

Power consumptions

Sound Pressure Level

STULZ – THE NATURAL CHOICE 10

Full potential of Energy Saving-7 -5 -3 -1 1 3 5 7 9

11 13 15 17 19 21 23 25 27 29 31 33 35 37

0

50

100

150

200

250

300

350

400

kWh

Freecooling Box ONLYFCB with SplitSplit Comfort ONLY

Frankfurt Temperature profileHeat Load = 3500WUsing FCB35 and Split Comfort data 80% Energy saving

STULZ – THE NATURAL CHOICE 11

Free cooling Conclusion

Save your Money

REDUCE COSTS

Use intelligent system

With FREE COOLING

Preserve your environment

STULZ – THE NATURAL CHOICE 12

Find STULZ ...

Italy

Germany

China

USA

Headquarter

… and its qualified and professional partners – worldwide.

Production Sites

India

Germany