1-stulz spa overall tlc _0912

STULZ – THE NATURAL CHOICE

STULZ SpATLC+HD units

Matteo Foroni September 2012

STULZ – THE NATURAL CHOICE 2

TLC and HD lines: product families

PRODUCT FAMILY APPLICATION INSTALLATION MODEL: INTERNAL AIR SUPPLY

Wall-Air Shelter Vertical external air conditioners

WDE: Displacement – available with inverter (WDI)

CVS: Upflow – outside catalogue available on request

Tel-Air-2 Shelter Vertical internal air conditioners

TLF: Displacement

TLD: Downflow

TLU: Upflow

Eco-AirTelecommunication

rooms

Close control air conditioners DX with remote condenser / CW and free

cooling with direct air.

CAF – CWF: Displacement

CAD – CWD: Downflow

CAU – CWU: Upflow

Split-Air

Low NoiseShelter

Air conditioners with external motor-condensing unit and internal evaporating unit in vertical or

horizontal position

CSL: direction of air supply can be adjusted with a grille on air supply

opening

Free-Air-3 ShelterVentilation units with free cooling and

emergency ventilation 48V DCCSL: frontal air supply

June 2012

Stulz SpA – TLC + HD products

STULZ – THE NATURAL CHOICE 4Stulz SpA – TLC + HD products

• Continuous demand of energy

• Energy cost growth will not stop soon

• Air conditioning power consumption can be more than 30% of total input in a BTS

Energy demand

Item …………..2 RACKS GSM 2,4 kW1 RACK UMTS 2 kWTOTAL INPUT RACKS 4,4 kWOther heat emission (microwave, rectifiersbatteries, solar radiation) 0,6 kWTotal cooling requested 5 kWPower input of comfort split unit 2,5 kWTotal POWER INPUT IN THE BTS 6,9Air Conditioning 36%

June 2012


Technological Sites: traditional cooling

Under Over

Air inlet

Delivery

Top air inlet

About 80% of applications

Needs: false floor

Bottom air inlet

Remaining 20%

Needs: air ducting

Delivery

Air inlet

June 2012

5Stulz SpA – TLC + HD products


Traditional cooling – critical issues

• Downflow: Height required for raised floor Lay-out of distribution grilles Air flow losses through the openings of raised floor More energy for ESP required for air flow through raised

floor Power absorbed by fans

• Upflow: Mix between cold and warm air If supply is ducted, more power absorbed by fans Distance between air conditioners and equipment to be

cooled

June 2012



• Cold air is supplied at

floor level and low

velocity (1 m/s or

less)

• Stratification of

temperature:

negligible mix of cold

and hot air

• No need of raised

floor systems

• Main benefit: air

distribution and lower

operation costs

June 2012

Displacement, features


• Two strongly marked areas: hot air zone (around 30°C) and cool air zone. The

boundary is located over the top of the TLC cabinets

• Optimal bottom feeding of equipment racks

June 2012

Displacement, air distribution

Tem

pera

ture


Stulz displacement solutions

June 2012

Close ControlPackaged Displacement


Wall-Air Displacement

...cold air where racks need


• Unit developed in 2007 responding to Vodafone

Europe tender

• First of Telecom line air conditioners with

displacement air supply

• Optimized air distribution in the shelter

• Increase of energy efficiency (EER > 3)

• Six cooling capacities from 4 to 14 kW

• Noise reduction for installation in urban areas:

reduction of 10-12 dB(A) compared with upflow units

with the same capacity

• R407C up to high external temperatures (+50°C)

Start point: WLD units

Target: performanc

e

June 2012



• High performances, in line with WLD units

• New unit with higher capacity: up to 15,7 kW

• EER ≥ 3 for every model

• OPTIMIZED DIMENSIONS 8 kW model: footprint -40%, volume -45% μchannel condensers with reduced surface no need of lateral

openings for condenser air intake less clearance for installation

• OPTIMIZED AIR FLOW Increase of working surface of filter Increase of working surface of evaporator coil Improvement of free cooling air flow

• WIDER APPLICATION μchannel condensers have a better resistance against

corrosion: standard version has higher resistance than standard cu-al coils. Treated version has higher resistance than standard cu-al coils with epoxy treatment.

Evolution: WDE

Target: optimizatio

n

June 2012



• EASIER INSTALLATION Frame designed for unit lifting with eyebolts Cable guides directly to the electric box Alarm interface integrated in the electrical box (no

more ACTADAPT) No protruding air deflectors for free cooling air:

reduced depth and one installation step less

• EASIER MAINTENANCE Easier filter extraction

Evolution: WDE

Target: easiness

June 2012



WDE: Sensible cooling capacity (kW) - EER

June 2012


CVS upf

low*

WLD

WDE

Lieb

ert H

PW

Unifla

ir W

DF

RC Und

erpa

c0

2

4

6

8

10

12

14

16

18NOTEcooling capacities esteemed at the same conditionsreturn air temp. = 30°C /external air temp. = 35°C*except CVS upflowreturn air temp = 25°C /external air temp. = 35°C

Wider rangeUniform

distribution

3,43,4

3,2

3,0

3,3

3,1

3,0 3,

6

3,0

3,6

3,6

3,0

3,4

2,9 / 3,5

3,7

2,8

?

2,9


WDE: Efficiency in free cooling - Noise

June 2012


EER free cooling (ΔT=10°C)

External s.p.l. @2 m [dB(A)] cooling mode

6 kW

Stulz WDE 61,3 51

Liebert HPW 43,2 50

RC Underpac 25,8 47

8 kW

Stulz WDE 28,3 52

Liebert HPW 28,5 52

RC Underpac 20,1 51

14 kW

Stulz WDE 27,5 60

Liebert HPW 12,1 58

RC Underpac 19,6 54

More efficiency

in free cooling


• Refrigerant R407C

• Maximum external working temperature = +50°C

• On-off scroll compressor (except WDE40) + TEX valve

• Fan speed control

• G4 zig-zag air filter

• Power supply: 400/3+N/50 – 230/1/50 + 48 V DC

(when DC emergency ventilation is ordered). DC

power supply must be always available on site. 60 Hz

available on request.

• Controller: C2020 without display

• 6 operating modes: DX cooling Free cooling (optional) Mix mode (with optional free cooling) Emergency ventilation (optional) Heating (optional) Dehumidification (with accessory ACTRHC)

17

June 2012

WDE: features



WDE: Accessories - Options

June 2012


Code Description Note

R134a R134a refrigerant instead of standard

R407C

For external temperatures > 50°C. To keep cooling capacity, compressor is two size bigger. 230/1/50 not

available for WDEA2-A4-A6 in combination with R134a

RSC1.5 / 3.0 / 4.5 Electrical reheat 1.5 / 3.0 / 4.5 kW

TREAT Protective treatment of heat exchangers

Epoxydic painting of evaporator coil.Cataphoresis of μchannel condenser (higher protection

than cu-al with epoxydic paint)

PAKIN Stainless steel AISI304 casing

ACTGRxxWDE Aluminium air grilles for internal air

Supply air grille with adjustable fins

ACTGRxxWDIF Supply air diffuser + return air grille

Diffuser to reduce supply air speed (displacement effect)

CRA Compressor crankcase heater

For external temperatures < -20°C

WINTER KIT Kit for low external temperatures

For external temperatures <-25°C down to -40°C

SOFTT/M Softstart


WDE: Accessories - Options

June 2012


Code Description Note

PSCR Phase sequencing control for 3-phase scroll compressors

Not on WDE40 as the 3-phase version is provided with reciprocating compressor. It stops

compressor when rotation is no correct (no signal to C2020)

SWM / SWT Main switch Protection of e-box: to remove the cover of e-box, main swich must be opened

VCC Voltage control card It interrupts main power supply to the unit when voltage is outside the admitted range (not

against peaks)

ACTAST Adapter for software up/download with

laptop

ACTHKEY Hardware key for software up/download

ACTRAS Remote air temperature sensor

Second sensor for internal temperature, to be placed in a critical zone of the shelter (for

instance near UPS)

ACTRHC Humidity sensor To control dehumidifcation mode

ACTSEQC2 / ACTSEQC10

Sequqencing cables 2m and 10m

ACTSERC1010 Serial adapter RS485 For telemonitoring net


• ACTKPDC1010 LCD display 20x4 All menus and parameters can be accessed with the necessary passwords For installation / service purposes

20

June 2012

Optional keypads


25/06/08 11:18Room temp. :

31.2 °CExt temp. :

28.4 °CSYSTEM ON

Display LCD 20 x 4

Exit from menus,exit without saving, manual reset of alarms

Access menus from any main screen

Scroll screens, menus or parameter values

Save new valueOFF / Stand-by / ON


On Off/ Esc

Menu/ Set

H8

H7

H9

L1

L2 L3

• ACTUKPD 3-digit LED 7-segments display 3 warning LEDs Only user setup menu (setpoints, language, clock), alarms and counters can be accessed. Fur user purposes

21

June 2012

Optional keypads


H7 (green): cooling or free cooling ONH8 (yellow): common warningH9 (red): common alarm

Access menus,save new value

Scroll screens, menus or parameter values

ON / OFFExit from menus,exit without saving, manual reset of alarms


WDI = WDE + EC compressor + EEV

June 2012


•EC modulating compressor. Brushless motor with permanent magnet technology

•Volume ratio of scroll optimised for highest efficiency in cooling mode

•High power factor•Integrated functions: softstart;

crankcase heater•Direct control of working parameters

and compressor envelope in all working modes.

•Built-in compressor protection and safety features

•Positive displacement oil pump to provide lubrication and sealing at entire speed range

•Special control algorithm for oil management

EC compressor

•Controlled by the same driver of the compressor. Short transient time and higher efficiency

•More reliability: reduced stress of refrigerant circuit during variation of compressor speed

Electronic expansion

valve


WDI vs. WDE

June 2012


WDE: ON-OFF compressor WDI: EC modulating compressor

Inefficiency caused by transients when unit starts. High loss of efficiency at partial loads.

Best efficiency at partial loads.

Application is not flexible: the cost of oversizing the unit is the low efficiency.

High flexibility of application: oversizing the unit, no need to change it when cooling demand increases due to site upgrades.

With on-off compressors, anti short cycle protection limits the number of on-off cycles to 10 / hour. Therefore, during off cycles, temperature increases far from the set point.

With inverter compressor, temperature is close-controlled, with smooth fluctuations following the variations of heat load.

Power factor = 85% – 90% Power factor = 96 – 98%

High in-rush current: with a limitation of power supply line to the site, softstart is needed.

No in-rush current with a special control of ramp-up phase (inverter control with DC current injection).

Crankcase heater needed for low temperature applications.

Crankcase heater functionality in the control software.

On-off cycles operational stress for compressor (overheating of motor windings) shorter life cycle

Continuous operation longer life cycle of compressor.


WDI vs. WDE

June 2012


WDE: ON-OFF compressor WDI: EC modulating compressor

Modulation of condenser fan.Evaporator fan is on-off.

Full modulation of all components in cooling mode: compressor, condenser fan, evaporator fan. Evaporator fan speed is controlled according to the cooling capacity. Working logic keeps the difference between return and supply air temperature constant around an adjustable set point.

Refrigerant R407C. Maximum outdoor working temperature = 50°C

Refrigerant R410A. Maximum outdoor working temperature = 45°C

400/3+N/50 and 230/1/50 power supply available

Currently 230/1/50-60 available.400/3+N/50 planned for second half of 2012.

Fan speed

Set point delta T

max

min

TR - TI

Compressor speed

Set point supply TI0%

100%


WDI: efficiency

June 2012


0,00

2,00

4,00

6,00

8,00

10,00

12,00

14,00

16,00

20 22 24 26 28 30 32 34 36 38

External temperature (°C)

Average EER

WDE80

WDI80

CONDITIONS:

• 8 kW load for 20% of time; 6 kW load for

70% of time; 4 kW load for 10% of time

Best efficiency of WDI in mixed

mode


• Compared to WDE, the following options are not available: R134a is not available for EC compressors 400/3+N/50 power supply at the moment is not available. Only 230/1/60 available at 60 Hz CRA – crankcase heater is integrated in EC compressor SOFTM – softstart is integrated in control logic of EC compressor VCC – voltage control card is integrated in control logic of EC compressor

• Compared to WDE, the following accessory has been added: ACTSEQPRG: sequencing is not via slave port, but via PRG port. So the interface

ACTSEQPRG is necessary. This interface provides the PRG port with the phone connector matching sequencing cables ACTSEQC2 / ACTSEQC10

NOTE: sequencing and telemonitoring are not available in the same time as they

pass through the same PRG port.

June 2012

WDI: accessories / options


• Vertical external application

• Cooling capacity range 4 ÷ 17 kW

• Options: free cooling, 48 VDC emergency mode

• Reciprocating compressor on 4 kW model. Scroll

compressor from 5 kW, equipped with protecting devices

charged with R407C

• Thermostatic expansion valve to optimize working

pressures at different outdoor temperatures

• Flat air filter G3

• Protection on single components: compressor (internal +

HP + LP) and fans (thermic + internal), anti-freeze. Delay

function against short ON-OFF cycling of compressor

• External working range from –20°C to +45°C

• Anti-vandalism mono-block structure, made of zinc plated

steel and coated with protective paint

• Frontal access to main components

June 2012

Wall-Air upflow: basic features


Out of catalogue – available on request


Tel-Air-2

... maximum flexibility for the indoor


TLU

TLD

/TLF

Tel-Air-2: the range

June 2012



0 5 10 15kW

TLU80-A4

Tel-Air TLU(Under-Over)

Tel-Air TLF - TLD(Displacement - Downflow)

TLU40-60

TLF/D80-A4TLF/D40-60

Tel-Air-2: the range

June 2012



Tel-Air-2: features

• Refrigerant R407C

• Maximum external working temperature = +50°C TLx40/60;

+45°C for the other models

• On-off scroll compressor (except TLx40) + TEX valve

• Fan speed control

• G4 zig-zag air filter

• Power supply: 400/3+N/50 – 230/1/50 + 48 V DC (when DC

emergency ventilation is ordered). DC power supply must

be always available on site. 60 Hz available on request.

• Controller: C2020 without display

• 6 operating modes: DX cooling Free cooling (optional) Mix mode (with optional free cooling) Emergency ventilation (optional) Heating (optional) Dehumidification (with accessory ACTRHC)

June 2012



Condenser coil

Electrical panel

CONNECTIONSpower supply, signals,

key-pad and sequencing

Air filter

Heating resistances

Evaporator fan

Free-cooling damper

Evaporator coil

Condenser fan

Compressor

Key-pad

Condensate drain pan

TLF/D: layout size 1

• TLx 40/60

• Dimensions

(HxWxD): 1990 x

600 x 650 mm

• Frontal access for

ordinary

maintenance (also

condenser fan)

• Wide frontal grille

for internal air

supply. No air

supply from sides

June 2012



TLF/D: layout size 2

• TLx 80/90/A2/A4

• Dimensions

(HxWxD): 1990 x

900 x 700 mm

• Frontal access for

ordinary

maintenance (also

condenser fan)

• Wide frontal grille

for internal air

supply. No air

supply from sides

Condenser coil

Electrical panel

CONNECTIONSpower supply, signals,

key-pad and sequencing

Air filter

Heating resistances

Evaporator fan

Free-cooling damper

Evaporator coil

Condenser fan

Compressor

Key-pad

Condensate drain pan

June 2012



• Supply air diffuser (TLF40-60)

• Flanges for condenser duct connection

• Plenum 90° for condenser duct connection

• Electrical reheat

• Refrigerant R134a

• Softstart for compressor

• Keypad on board or remote

• Voltage control device

• Quick power supply connectors

• Control of phase for units with 3-phase scroll

• Screw terminal for I/O signals to C2020

• Winter kit for outdoor temperatures < -25°C

• Main switch

Tel-Air-2: accessories / options

June 2012



Eco-Air

...the new challenge

June 2012



• DX or CW cooling mode

• DX unit with scroll compressor and R407C

• CW version with 3-way valve

• 2 unit sizes

• 8 cooling capacities for DX (from 6 to 35 kW)

• 9 cooling capacities for CW (from 8 to 33 kW – L26W9)

• All cooling systems available in: displacement (CAF-CWF) upflow (CAU-CWU) downflow (CAD-CWD)

• With / without direct free cooling

• Mixed mode available

• EC Fan on size II models

• Zig-Zag G4 filter

• C2020 controller for sequencing, rotation, alarms, stand-by management

Eco-Air: main features

June 2012



0 10 20 30kW

EcoAir DX size 14 models from 6 to 14kWBase (WxD): 900x700 mm

5 15 25

CAx60-A4

CAxA7-C5EcoAir DX size 2 4 models from 17 to 35kWBase (WxD): 1000x892 mm

Height without FC = 1990 mmHeight with FC (CAF / CAD) = 2137 mmHeight with FC (CAU) = 2590 mm

Eco-Air DX: the range

35

June 2012



0 10 20 30kW

EcoAir CW size 13 models from 8 to 14kWBase (WxD): 900x700 mm

5 15 25

CWx80-A5

CWxB0-D5EcoAir CW size 2 6 models from 16 to 32kWBase (WxD): 1000x892 mm

Height without FC = 1990 mmHeight with FC (CAF / CAD) = 2137 mmHeight with FC (CAU) = 2590 mm

Eco-Air CW: the range

June 2012



• Electrical heaters

• Steam humidifier: 3 kg/h on size 1 – 8 kg/h on size 2

• Free cooling kit

• Raised floor support

• Phase sequencing control

• Voltage control relay

• Remote air temperature sensor

• Humidity sensor

• Other accessories for telemonitoring and sequencing nets

• Other accessories for software update…

Eco-Air: accessories / options

June 2012



EcoAir: direct free cooling

Return Air

Free cooling

Electric connections

FC servomotor

Refrigerant connections

Freecooling plenum H = 140mmFree cooling plenum upflow H = 600mm

Free coolinglouvers

Return airlouvers

Plenum FC for CAU

Plenum FC for CAF-D

June 2012


• Easy installation

• Mix mode, free cooling + DX

• Advanced control logic for optimal working

in any condition

• Energy saving: combination of free cooling +

displacement reduces drastically energy

consumption

• Direct free cooling with external air: no water

in the data centre

41

Direct free cooling installation


June 2012


Split-Air LOW NOISE

...designed for residential area

June 2012



• 5 cooling capacities from 4 to 11 kW

• Low noise emission

• Same internal unit for ceiling / wall installation

• Internal unit with supply air grille with adjustable

fins

• Free cooling, DC emergency ventilation

available

• Mixed mode

• New controller C2020 I/O to manage

sequencing, rotation alarms

• R407C with rotary / reciprocating compressor

(4kW) or scroll (from 5 kW)

Split-Air Low Noise: basic features

June 2012



kW 0 5 9 11

CST60-80Split-Air CST

Split - Air CSL(Low Noise)

CST40-50

CSL80-A2CSL40

- 60

Split-Air Low Noise: the range

June 2012



Split-Air Low Noise: performances

June 2012



Increasedcondenser surface

Low noisecondenser fan

Split airLow Noise

Soundproofed boxfor compressor

Split-Air Low Noise: outdoor unit

June 2012



Split-Air Low Noise: air flows

June 2012



Split-Air Low Noise: accessories / options

• Electrical reheat

• Refrigerant R134a

• Softstart for compressor

• Keypad remote

• Humidity sensor

• Voltage control device

• Control of phase for units with 3-phase scroll

• Screw terminal for I/O signals to C2020

• Free cooling ducts

• Winter kit for outdoor temperatures < -25°C

• Grilles and overpressure dampers for free cooling

June 2012



• Big potential market, but low sales due to

aggressive prices (split units are sometimes in

competition against comfort ACUs)

• Need of reduction price / capacity

• Simplified units

• Lower installation cost

• Demand of a model with higher capacity (14-

15 kW)

• Integration of modulating compressor as an

option

49

June 2012

SAL: new Split-Air units. Why?



• Higher performances, compared with CSL units

• New unit with higher capacity: up to 14,5 kW

• EER ≥ 3 for every model (to be confirmed for CSL40 with reciprocating

compressor)

• New s-force ebm fan model

• Optimized air flow in the internal unit: e-box is beside the evaporator

fans and doesn’t obstruct the air flow

• Condensate collector for vertical application is removable, so that in

horizontal application it doesn’t obstruct the air flow

• Introduction of μchannel condenser (same model as WDE units)

• Possibility of external temperatures up to 50°C (TBC after tests)

June 2012

SAL: new Split-Air units

Old CSLNew SAL

e-boxe-

box

air filter

Target: performanc

e


• Main power supply to the external unit:

internal unit receives power supply from the

external one

• Two electronic controllers for the internal

and the external unit, so only one serial

cable for communication. Signal cables with

multiple wires are not needed anymore

• Inside the internal unit connections for

power supply, signal cable, alarm interface,

keypad and sequencing are easily

accessible

• Possibility to modify supply air direction on

site, simply moving one plate

• Same model for ceiling and wall mounting.

• On internal unit only one panel with

improved fixing system to access all

components

June 2012

SAL: new Split-Air units


Target: easiness


• Free cooling will be managed as a separate accessory, with a plenum for fresh air

intake, containing free cooling damper. Possibility of retrofitting with free cooling

without changing the internal unit.

• Range of options / accessories will remain the same as the currently available one.

Option main switch will have two switches: on both the internal and the external unit for

an easier maintenance.

52

June 2012

SAL: accessories / options


Fresh

air

Internal air


• Sensible cooling capacity is always higher

• Internal air flow is always higher (benefit for free cooling efficiency)

53

June 2012

SAL: technical data size 1


MODEL Cooling capacity (total / sensible)[kW] *

Evaporator air flow [m3/h]

Internal sound pressure [dB(A)] **

Internal dimensions without free cooling (HxWxD) [mm]

External sound pressure [dB(A)] **

External dimensions (HxWxD) [mm]

CSL40 4,4 / 3,6 1000 60 310x856x800 43 578x806x400

SAL40 4,0 / 4,0 1100 60 350x850x1000

45 700x1050x450

CSL60 5,7 / 5,0 1200 62 310x856x800 43 641x1052x454

SAL60 6,0 / 6,0 1600 60 350x850x1000

48 700x1050x450

CSL80 7,0 / 6,2 1700 59 375x956x1000

43 641x1052x454

SAL80 8,0 / 8,0 2300 62 350x850x1000

49 700x1050x450

* At return air temperature = 27°C, RH = 45%, external air temperature = 35°C** At 2 m distance from the unit, free-field in nominal conditions


• Sensible cooling capacity is always higher

• New model with 14,5 kW capacity

54

June 2012

SAL: technical data size 2


* At return air temperature = 27°C, RH = 45%, external air temperature = 35°C** At 2 m distance from the unit, free-field in nominal conditions

MODEL Cooling capacity (total / sensible)[kW] *

Evaporator air flow [m3/h]

Internal sound pressure [dB(A)] **

Internal dimensions without free cooling (HxWxD) [mm]

External sound pressure [dB(A)] **

External dimensions (HxWxD) [mm]

CSL90 10,3 / 8,7 2300 62 375x956x1000 46 1386x1052x454

SALA0 10,0 / 10,0 2300 62 410x1040x1100

50 1350x1050x450

CSLA2 12,3 / 10,6 3000 64 375x956x1000 51 1386x1052x454

SALA2 12,0 / 12,0 3000 62 410x1040x1100

52 1350x1050x450

SALA5 14,5 / 14,5 3400 62 410x1040x1100

55 1350x1050x450


• Size 1 with modulating capacity 4 to 8 kW

• Size 2 with modulating capacity 10 to 15 kW

• R410A refrigerant

• Option R134a not available

• Maximum outdoor temp. = 45°C

• Softstart, phase control, voltage control,

crankcase heater are included in the package

of EC compressor

• Only single-phase power supply available at

the moment

55

June 2012

SIL = SAL + EC compressor + EEV



SAL – SIL: market introduction

June 2012


Now: detailed design and prototyping phase

December 2012: launch of SAL/SIL

whole range 2013: phase-out of

CSL units


Free-Air-3 / -In

The proven retrofit Free Cooling solution for telecommunications infrastructure

… for internal

and external installation


Energy savings up

to 84%

Free-Air units

The use of free cooling offers potential of high energy savings. In shelters where only comfort A/C units are used for cooling this potential is still unused.

• where comfort A/C units work with a high part of latent capacity

• where diesel generators produce the required power

Retrofitting provides a very fast return on investment in shelters….

June 2012

Stulz SpA – TLC + HD productsAmbient temperature (°C)

Annual energ

y c

onsu

mpti

on (

kWh)

Energy consumption of a system with free cooling

Energy consumption of a comfort A/C unit without free cooling

The example shows a 3.5 kW unit /Location: Germany


• Easy mechanical and electrical installation

• Ready for operation on the very first day

• Existing comfort A/C units can be integrated with ease

• 48V DC power supply allows the use as emergency

system

June 2012

Free-Air-3: the best solution for retrofit



• Powder coated casing made of galvanised steel

• Airflow and clogged filter signal

• Microprocessor to control the complete system incl. existing

comfort units

• Maintenance free EC radial fan

• Semi-automatic start-up test for checking the FCL components

June 2012

Free-Air-3 / Free-Air-3-In common features



• Optimum utilization of shelter room: full space to the IT

equipment

• Maintenance accessibility from outside

• Possibility to extend the standard G4

zigzag filter (0,7 m² filter surface) with 1,05 m2 zigzag

filter + metallic pre-filter

• Optional high performance compact filter with low

pressure losses and high filtering surface

June 2012

Free-Air-3: external installation


FreeAir-3 types:FCL600B2FCL350B2

WHY?


• Optimal protection against vandalism

• Against weather and the environment

• Against damage /malfunction through snow

load

• Pocket filter with 2 m² surface: long service

life & low pressure drops

June 2012

Free-Air-3-In: internal installation

WHY?

FreeAir-3-In types:FCL600B1FCL350B1


Free-Air-3 and Free-Air-3-In: technical data

June 2012

1) Inside temperature 30 °C / rel. humidity 40 % / ambient temperature 20 °C

2) Noise level at 1 m distance, free-field conditions


Installation example: FCL + 2 x comfort A/C-units

power relay integrated on C102 IO-Controller

mains supply for comfort A/C units: 230 V AC max. 20 A

battery power supplyfor FCL: 48VDC

• Enabling of Free cooling (FCL) and ON/OFF DX-mode of the comfort A/C units via

C102-controller

• Technical precondition: The comfort A/C units must be provided with automatic restart

after power failure


• Control and monitoring of Free-Air-3 and connected

comfort A/C-units

• Possibility to control 1 A/C unit + 1 external heater

• Measurement and transmission of DC power

consumption

• Monitoring of DC voltage to stop the unit when voltage is

outside the admitted range and battery charge gets low

• To preserve back-up battery: fan speed can be reduced

in case of mains power failure

June 2012

C102 controller functions



• Filter alarm can be triggered by differential pressure or

via a manually adjustable fan operating time

• Comfort mode: fan of Free-Air unit can be stopped for

an adjustable time interval to service the other

equipments in the shelter. Comfort A/C units can still

work to keep the temperature. Restart is automatic

• Semi-automatic test function for start-up

• Telemonitoring via ModBus and Stulz SCP protocols

June 2012

C102 controller functions



Free cooling

• Free-Air units can be operated on their own

or in combination with comfort A/C units. As

soon as the temperature difference between

shelter and ambient is big enough, the C102

control logic stops the comfort A/C units and

enables free cooling mode.

• Fan speed control by C102, with adjustable

min and max speed

Cooling

• Outside of the free cooling conditions,

cooling takes place only through the comfort

A/C units (if present).

• C102 on board the Free-Air units controls up

to two comfort A/C units. Different start

values of internal temperature can be

assigned to each unit.

June 2012

Working modes



• When assisted free cooling is selected and free cooling conditions are present, the A/C

units can work together with Free-Air for a maximum cooling effect.

• When this working mode is not selected, cool is produced alternatively by either the

A/C units or the Free-Air.

June 2012

Working mode: assisted free cooling

= energy saving

+


Enabling conditions:

• the shelter temperature exceeds an adjustable

value

• the temperature difference between shelter and

ambient is >1°C

Þ Free-Air fan speed 100%

June 2012

Working mode: hot working control



Requirements:

• System of Free-Air and comfort A/C-units

• Humidity switch (Free-Air accessory ACTRHS)

Enabling conditions:

• When humidity exceeds the set threshold, the

unit is in dehumidification mode

Þ Free-Air fan speed 0% for an adjustable time

Þ comfort A/C-units: ON when temperature is

above set point in dehumidification

June 2012

Working mode: dehumidification



LCD user- and service interface

ACTKPDC1010

• Plain text display

• Full accessibility for start-up and

service

• Password protected menus

User keypad ACTUKPD

• Keypad with 3-digit 7-segment display

• For user functions such as set point

modifications, display and reset of

alarms

June 2012

User interfaces



• aluminum or stainless steel casing

• external user interface

• humidity switch

• BMS connection

• supply air grilles with adjustable fins**

• weather-proofed excess pressure louver with anti-insect net

• weather protection plenum*

• aluminum supply air grill with fixed fins*

• paper and leaf guard**

June 2012

Free-Air-3 and Free-Air-3-In: some examples of options


ACTEIGFCL* (Air intake protection grill)

ACTEIPFCL* (Air intake protection plenum)

ACTEXTGRFCB** (Paper and leaf guard)

* for Free-Air-3-In/ options include metal -prefilter

**only for Free-Air-3 available


• slider for Shelter- and ambient

temperature

• visualization of operation modes

• calculation of energy savings

June 2012

Free-Air-3 online- simulation tool


available at http://www.stulz.com/products/telecom-ac/free-air


...thank you for your

attention!

June 2012


1-stulz spa overall tlc _0912

Documents

natural choice1cold

hot air zone

cool air zone

condenser air intake

natural choicestulz

natural choice7two

natural choice5traditional

natural choice11unit