energy efficient heat removal and redistribution · furthermore two fan units working in tandem...

incorporating technology

Energy efficient heat removal and redistribution

‘DAX’ Directional Airflow eXhaust system

Product overview and technical data

Overview and principle

‘DAX System’ - what is it?

The primary function of the Directional Airflow Exhaust ‘DAX system’ is theremoval and distribution of heat from the rear of a 19” cabinet in an energyefficient and controlled way.

EC centrifugal fans offer 1075m3/hr

Features and benefits

A substantial reduction in power consumption

▪Reduction on air conditioning usage

▪Heat the office in winter months or other rooms/spaces with reclaimed heat

▪Energy efficient EC fan technology

▪Optimise hardware performance

Capital cost reduction

▪Extended life span on room air conditioning and active equipment

Environmental control and monitoring

The UTelligent FaEn (Fan and Environmental) control philosophycontinuously monitors and modulates the fan speed dynamicallyadjusting to ensure optimum performance

Built in redundancy

In the event of a system fault, the DAX unit will continue to performuninterrupted until the fault can be fixed

Local environmental display/diagnostics

Enables each unit to have current status viewed offering peace of mindthat your system is working as required

+44 (0) 1767 652 817 [email protected] www.usystems.co.uk

Substantial reduction in power consumption

Room air conditioning systems use large amounts of energy, especiallyin summer months, but when you add into the room a typical fullypopulated data comms cabinet - it’s like adding a very large electricradiator into the room - the air conditioning system simply has to workthat much harder in order to maintain the required ambient roomtemperature. The answer is to duct the hot air away from the cabinetand into another space, such as the ceiling plenum, outdoors or to reusethe heat in a warehouse or adjacent office. This way the hot exhaustair does not enter into the room thereby significantly reducing thepower consumption of HVAC systems.


Reclaimed and recycled room heating

Although exhaust air can be redirected to another space giving theoption of ‘free’ heating, in some cases it is likely that the exhaust airwill be merely dumped outdoors. So as not to waste this resourceespecially in winter months, the DAX system has been designed to allowthe air to be redirected back into the room either manually orautomatically thus reducing the heating bill and your carbon footprint.

Capital cost reduction

This ability to redirect waste heat means the life expectancy of theHVAC system is extended as it doesn’t have to work so hard.

When hardware is maintained at too high a temperature for a sustainedperiod of time, its life expectancy is drastically reduced and it will needto be replaced much sooner than necessary. Because the DAX systemenables a constant ambient temperature, a much longer life expectancyis maintained throughout its working life.

Energy efficient by design

The DAX system incorporates ‘EC’ fan technology which is more energyefficient than standard AC or DC fans. Furthermore the EC fans aretemperature controlled via the UTelligent FaEn controller so they onlyneed to go at the speed necessary to remove the heat.

Benefits explained

DAX System

Exhaust hot air back to the room

Exhaust hot air to wall plenum

Exhaust hot air to ceiling plenum

or

or

Incorporating

Technology


Other operational benefits include:

Benefits explained

Hardware performance

The DAX system comprises of two independently operating EC fansworking in tandem enabling one to take over the performance of theother in the event of fan, sensor or DC supply failure until areplacement can be hot swapped. This way the cooling of theequipment is maintained. .

Hardware is severely hampered when operating at higher thanrecommended temperatures, on-board chips will often throttle backand perform at half speed or lower in order to protect themselves. Theconsequence is that the speed of the software will run much slowerand tasks will take much longer to carry out. The DAX system ensuresa stable working environment.

Built in redundancy

The DAX system has been designed to work with one or two ECcentrifugal fans. Each fan delivers 1075 Cfm which in an average roomtemperature of 21 degrees equates to around a combined 12kW hot airremoval with the 2 fan system. In most cases one fan will be sufficientto remove the heat load generated by the active equipment. Howeverthe benefit of using two EC fans is the redundancy provided.Furthermore two fan units working in tandem will mean they rotate ata slower speed thereby using less power and producing less noise.

▪Each system comes complete with an LED display, providingenvironmental information such as internal cabinet temperature, fanand thermistor status. In the event of a system fault this will also bedisplayed.

▪There is also a local audible alarm in the event of any failure

▪Alarm status can be monitored on the network via SNMP

▪On-board diagnostics

▪Network option capability for remote monitoring, email notificationinclusive of GUI (Graphical User Interface)

▪Administration rights and user access rights

▪Hot swappable fans

▪Upgrade existing USpace 4210 cabinets

Front view DAX with compliant cabinet

Rear view DAX with compliant cabinet


Material 1.2 mm CR4 steel

Finish Textured powder paint: Light grey RAL 7035 or USpace Black, RAL 9005

Weight 12 kg (combined weight of main duct body and telescopic duct)

ISO 9001: 2008 accreditationUSystems is registered for this quality management system, covering all manufacturingareas and associated processes

Build Specif ication

220mm Ø backward curve fan incorporating EC technology

IP 44 rated

DAX System

1 x 220mm Ø backward curve EC centrifugal fan

1 x single channel FaEn board and digital EC fan speed control board’. FaEn board isinclusive of:

▪ User adjustable fan ramp rate

▪ General fault alarm

▪ On-board diagnostics1 x temperature sensor (sensor can be placed anywhere in the cabinet)

Wiring looms

Auto ranging switch mode PSU for DC supply to FaEn board

Fan assembly

Cabinet

1 x DAX compliant USpace 4210 cabinet with on board LED status monitor

Please note - The DAX cabinet comes with either one or two DAX fan assemblies eachhaving an independent mains feed. Full redundancy however can only be achieved whentwo fans are deployed and fed by separate power supplies. Each DAX fan assemblycontains the following:

Technical specif ication

DAX fan assembly housing

EC centrifugal fan performance data

Current consumption per fan 240V/0.6A 115V/1.1A maximum

Airflow 1,075 m³/hr

Noise level at full speed 60dBA @1m

Noise level at 30% running speed 47dBA @ 1m

Power requirement FaEn 25mA each

Power requirement LED display 40mA each


Monitoring

Fan status which detects fan tacho feedback, fan stall, fan mains powerfailure, fan non-rotation and fan blockage.

Temperature sensor which monitors general temperature status, overand under temperature and thermistor fail.

On-board diagnostics

When the fault alarm is triggered the following faults can be identifiedvia on-board diagnostic LED’s:

●Fan status (working, fail, stall)●Over and under temperature●Temperature sensor fail●FaEn board fail (this does not include DC power fail)

NB. In the event of two simultaneous faults then diagnostic LED’swill pulse to identify each fault or scroll on LED display.

Safety feature

In the event of the faults listed below occurring and provided that240v/115v is present, the general alarm will be triggered and fan/s willautomatically go to full speed as follows:

●Temperature sensor fail i.e. not fitted, incorrectly fitted, componentfailure (open or closed circuit)●FaEn board fail●Loss of DC power to FaEn board●FaEn board fail

Technical information

UTelligent FaEn board

Two fan DAX system

USystems Limited

Unit 5 Green End Business Park, Green End, Gamlingay, Bedfordshire, SG19 3LF, England

T +44 (0) 1767 652 817 F +44 (0) 1767 651 983 [email protected] www.usystems.co.uk

USystems shall not be liable for any damages resulting from misapplication or misuse of its products. The company reserves the right to update its products without notice.

© USystems Limited, April 2014 Issue 2. ™ The USystems logo and UCoustic, ColdLogik, UTelligent and USpace are trademarks of USystems Limited.

ColdLogik rear coolers economically maintain the ambient air temperature within

a data and communications room while minimising the energy required to cool IT

equipment.

The coolers are fitted to the back on an enclosure typically being IEC297 and EIA

310 compliant. They have been designed to remove heat generated by the IT

equipment directly at source thus preventing hot air entering into the room.

ColdLogik rear coolers

Aisle Containment solutions suitable for new builds and is also fully retrofittable

onto both USystems and OEM cabinets for new build or existing data centres

without affecting day to day operations, where the cold aisle can be contained to

maximise cooling efficiency.

The USystems Aisle Containment systems are available to suit various aisle widths

and for aisle to walk configurations. Aisle Containment can also be installed

on mixed height aisles.

ColdLogik aisle containment

To improve the efficiency of a CRAC based data centre design, USystems ColdLogik

controlled air path CAP units isolate and guide hot air out of the top of the cabinet

into a ceiling plenum.

Removing hot air from each cabinet by ducting the air through funnels on the top

of the cabinet - in a controlled manner through to the ceiling plenum - is a logical,

simple and highly cost effective improvement to managing data centre cooling.

ColdLogik CAP system

from

DAX system cabinetsIntelligent directional cooling

USystems Limited

Unit 5 Green End Business Park, Green End, Gamlingay, Bedfordshire, SG19 3LF, England

T +44 (0) 1767 652 817 F +44 (0) 1767 651 983 [email protected] www.usystems.co.uk

USystems shall not be liable for any damages resulting from misapplication or misuse of its products. The company reserves the right to update its products without notice.

© USystems Limited, April 2014 Issue 2. ™ The USystems logo and UCoustic, ColdLogik, UTelligent and USpace are trademarks of USystems Limited.

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