Xenondata90÷330 kW

GeneralHigh efficiency indirect evaporative freecooling unit specially designed for Data Center applications, unit fitted with EC Fans, air to air heat exchanger, evaporative humidification device and optionally available with direct expansion top up cooling circuit equipped with hermetic inverter driven scroll compressor with brushless motor or with chilled water integration coil.

ConfigurationsR : Right: Unit accessibility on the right sideL : Left: Unit accessibility on the left side1 : SHEX - Single Heat EXchanger: Minimized Data Center side fans' energy.2 : DHEX - Double Heat EXchanger: Maximized evaporative effect.

Strengths ► Air to air heat exchanger with ad hoc sur-face treatment for the highest evaporative effect

► Unit Control ready for the most challenging Data Center requirements

► Minimum pPUE & Exponential efficiency increase at part load

► Teamwork solutions to exploit the part load efficiency even on fully loaded rooms

► Flexibility in lay out configurations & Re-duced installation costs

► Free the white space from cooling system and its maintenance

► Minimum impact to the electrical infra-structure

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Indirect Evaporative FreeCooling for Data Centers 3

Operating Principles 8When a Top-Up cooling solution is recommended 9

Applications 10Xenondata: Project by Project the Right solution 10Water Storage and Pumping System 13Unit Sizes and Trasportation 13Xenondata solutions to suit different applications requirements 18

Product Description 20

DESCRIPTION OF ACCESSORIES 24Aeraulic accessories 26Electrical accessories 27Hydraulic accessories 28Installation accessories 29Network accessories 30

Technical specifications 31

Electrical specifications 31

Operating limits 31

Noise levels 31

Installation advice 32Water characteristics 32Glycol mixtures 32

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INDIRECT EVAPORATIVE FREECOOLING FOR DATA CENTERSAdiabatic cooling is a well-known technology used since many years in different industries. The idea behind is to exploit, as per psychometric chart below, the evaporation of the water to cool the air. In fact, air has a specific characteristics: it can absorb water when water evaporates. Water evaporation, moreover, removes heat and consequently cools down the air temperature.Any air condition is defined by the dry bulb temperature and the wet bulb one. An ideal adiabatic process through the addition of water to the air would therefore be able to cool the air from its Dry Bulb temperature to its Wet Bulb one. A real one would get as close as possible to the wet condition depending on its efficiency.

Sample of Adiabatic Cooling Process

Thanks to the servers’ continuous technology improvement ASHRAE (American Society of Heating Refrigeration Air-conditioning Engineers) years over years increased within the Thermal Guidelines for Data Processing Environ-ments the recommended and the allowed operating envelopes for the IT equipment.

Above the latest recommended and allowable envelopes. Another fundamental industry trend is the continuously growing application of separation between cold and hot zones of the data room. Either cold aisle containment or hot aisle containment allows to keep properly separated cold and hot zones, and therefore to optimize the operating temperatures for the server on one side and for the cooling system (which is getting the real hot air back) on the other.The conjunction of these two trends made applicable with extremely interesting TCOs the use of the adiabatic cooling technologies within the Data Center industry.

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In fact, the adiabatic effect allows to reduce or even eliminate completely the need for the mechanical cooling (given a presence of a water storage properly designed). This is an important difference compared to direct freecooling solution which even considering the new ASHRAE guide lines would require a full mechanical backup in most of the European installations. Even considering a direct adiabatic cooling there would be the issue of exceeding the maximum humidity threshold whenever the adiabatic humidification will be operating. Another common fundamental requirement for the Data Center application is to maintain the server in a clean environ-ment free from external contaminations and pollutions as well as to avoid that unexpected external disturbances (fire, smoke, dust, intrusion, etc…) may compromise the white space operational continuity.Therefore the most common way the adiabatic cooling technologies have been applied in the Data Center business is through Indirect Adiabatic Freecooling Units. There is anyhow a way to get a more effective cooling from the process of water evaporation. The best way is to design a humidification system which deliver water on the entire heat exchanger external surface. Thus having an evaporative effect on the entire heat exchanger surface.

The Heat Removed (q) from the Data Center Air is driven from the turbolent exchange between the Data Center Air and the heat exchanger surface.

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The total heat removed is equal to the sum of 3 contributions:• q1: conductive heat transferred throught the heat exchanger and the water film.• q2: convection heat transferred to the external air (linked to the external air temperature).• q3: The heat removed from the water continuosly evaporating into the external air.

Within the 3, in this application, q1 tends to be almost negligible compared to the other 2. As well the heat linked to the evaporation (q3) tends to be relevantly bigger than the one only transferred to the external air (once there are the conditions to run the humidifier).On the other hand is fundamental to underline that the external air humidity has a key impact on q3. Humid air can drammaticaly reduce the absorption of the water and therefore the heat transfer linked to the evaporative effect.Summing all above considerations the most common way this technology is deployed within the Data Center industry is: Indirect Evaporative Freecooling Units.

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This technology offers additional benefits which are commonly well matching with Data Center application.• Maximize the White Space’s use: as all the cooling system sits outside the data room all the space can be opti-

mized to maximize the IT equipment installation• Maintenance outside the White Space: with the same logic as before having all cooling units outside the white

space means that any need of maintenance/service to the cooling part will not affect the data center operational continuity. In fact the Data Room will be free from any water nor refrigerant

• Scalability: often the Data Centers start with a low load and increase it over the years. Being the installation outside of the white space these units allow to fractionate the CAPEX having the installation divide into steps and therefore follow the real business increase. The room can be ready for the business growth just having a wall predisposition with dampers closing air inlet and outlet from the white space. Once the additional server will be installed and ready to start additional cooling units can be placed, installed and once the dampers will be open ready to cool the room granting full business continuity

• Part Load Efficiency: considering that external ambient conditions vary all year round and due to the existence of common cooling redundancy, it can be stated that the units work at part load most of the time. Therefore it’s a common industry understanding that part load efficiency it’s much more relevant that full load efficiency. A typical behavior of these units is to exponentially increase their efficiency at part load.The first contribution to the efficiency comes from the lower pressure drop in the air channels. In fact, if load is not 100% or if there are redundant units which can share the load and work all modulated, the airflow in the channel is reduced compared to peak design point. This has a square relationship with the pressure drops the unit’s fans have to win.

Above typical example of relationship between airflow and pressure drop.

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So the unit’s fans can work with a lower airflow as well as with lower required pressure. EC Fan have a cubic relation-ship between speed and consumption.

In addition given the same heat exchanger at part load the freecooling effect increases as well.

• Electrical infrastructure: these units allow to reduce dramatically the direct expansion system. In fact with the proper water storage the direct expansion system can be sized only to cover part of the cooling in the peak of the op-erating condition. The reduced direct expansion has a direct cascade saving on the electrical infrastructure reducing the sizing of the same (lower FLA) as well as the peak of the starting currents (lower LRA).

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OPERATING PRINCIPLESXenondata works in different modes depending on the external air conditions:

1) Air to Air Indirect Freecooling: During the cold season return air from the data center is cooled down indirectly from external cold air. With the indirect free cooling technology internal and external air flows are kept separated so to avoid contamination in restricted areas where IT equipment are safety stored. During this operational mode the external fan speed is controlled in order to maintain the right supply air temperature to the servers; 2) Air to Air evaporative indirect free cooling: XenonData software allows to choose between different operating modes based on which is the main application target. For sites where minimize the energy consumption is the main driver, the unit can enable the full evaporative humidification as soon as the external air is ready to absorb it, thus minimizing the overall fans consumption.Alternative operating mode exploiting the water effect, but minimizing its consumption enables the evaporative hu-midifier when outside becomes warmer and the air to air heat transfer is not any more enough to provide the desired supply temperature.In both cases Xenondata thanks to this can grant the right supply air even on summer operation without acting on any compressor or chilled water top up cooling. Continuous Evaporative Process – the advantage of the Xenondata’s Wet Heat Exchanger: Xenondata de-sign (heat exchanger surface treatment, evaporative humidification system) allows to extended the adiabatic process thus enlarging its effect.As long the External Air is heated in the heat exchanger there is additional possibility to absorb water as the air flow is dried. Oversaturating the air, the exceeding water evaporates along the process creating a sort of continuous evaporative process.Comparing a standard adiabatic process with the continuous evaporative process this second solution can provide up to 60% more heat exchanged for the same operating conditions. 3) Air to Air evaporative indirect free cooling Plus Mechanical cooling (or cold water cooling): In the case of extreme unfavorable external conditions, a Direct Expansion (DX) system or a Chilled Water (CW) coil are availa-ble as options to provide additional (Top-Up) cooling.The use of inverter scroll compressors and the efficient design in the chilled water case allow to mantain an extremely high system efficiency, even when these systems are in operation.These Top-Up cooling solutions are designed to provide from 30% to 40% of the unit nominal capacity in the design conditions (different mechanical cooling power amount can be evaluated).

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Above a Bin-distribution for London (N+1 Configuration; 24°C Supply to the Data Center) showing that unit is working continuously in Air to Air Freecooling and/or Evaporative Freecooling mode

When a Top-Up cooling solution is recommendedXenondata thanks to the design with continuos evaporative wet exchanger can reach the required supply air tempera-ture even in extreme working conditions without the activation of any Top-Up cooling.Its presence anyhow (at least on some units) can help in managing the unpredictable without increasing too much the electrical infrastructure. Here below some examples of cases where a Top-Up cooling can help to provide an additional emergency cooling:• Installation close to trees: Xenondata software keeps continuously under control the life status of the filters; anyhow

pollens during spring or leaves during autumn can quickly clog them, reducing at the same time the external airflow and therefore the unit cooling capacity. Top-Up Cooling in these installations can mitigate this event.

• Windy installations: wind direction might recirculate part of the exhaust air already hot and humid to the suction side, reducing the possible effect of the evaporative device and therefore its capacity. Top-Up cooling can help also in similar situations.

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APPLICATIONSTo optimize the space for the installation Xenondata is available in Left or Right version one mirrored respect to the oth-er. This is driving the unit design and the accessibility side. All the crucial parts of the units are easily and immediately accessible on one side only in order to minimize the maintenance time.

The advanced control system is keeping under control every single element of the unit providing actual status of each component and allowing to schedule in the most appropriate way a preventive maintenance to keep the highest system availability. The sections with inspection hatches for the humidification ramps are including lights IP67 which allow to easily verify actual working mode of the humidification ramps while the unit is running.

Xenondata: Project by Project the Right solutionXenondata is available with two different designs: Single Heat Exchanger and Double Heat Exchanger. The reason is that each design delivers some specific benefits and therefore best suit specific applications. Xenondata with Single Heat Exchanger (SHEX):The main driver for the SHEX is to optimize the Data Center side air pressure drops, to keep as low as possible the consumption of the fans on the Data Center side. The main consequences are that Xenondata SHEX units are designed for medium - high capacities and in multiple pieces (with the Data Center air path anyhow fully insulated in one single piece at the factory).The main drivers to chose Xenondata solution with SHEX are the following:• Supply temperature to the server: Looking to the latest ASHRAE guidelines the Recommended envelope reaches

the value of 27°C. SHEX design is delivering its best once the supply temperature that the unit needs to deliver is higher or equal to 24°C. Therefore if the new installation is designed following above guidelines Xenondata with SHEX can perfectly performs minimizing the annual energy consumption.

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• Locations: Xenondata with SHEX design optimizes the consumption of the Data Center side. Therefore all places with long winters and with a limited extreme summer wet bulb temperature are the perfect locations to chose the SHEX design; in similar locations in fact the external fans contribution becomes relevantly smaller compared to the data center fans side.Here a chart resuming the behaviour of Xenondata efficiency level with Single and Double heat exchanger designs based upon different locations and a design supply temperatures in front of the server of 24°C.

Data Center 500 kW with 3+1 units all in operation. 24°C Supply Temperature in front of the servers. Delta Tempera-ture across the servers 12K.

• Top Up Cooling: Xenondata with SHEX design can suit high capacities of top up cooling thanks to the flexible unit

design. Additionally SHEX design by definition would need a bigger top up cooling compared to a DHEX in similar conditions.Resuming all the aspects just explained Xenondata with single heat exchanger thanks to its flexibility in the design can perfectly match all the requirements of medium-large Data Center applications targeting the lowest energy con-sumption within the ASHRAE Recommended envelope.

Xenondata with Double Heat Exchanger (DHEX):The main driver for the DHEX is to maximize the evaporative cooling capacity for the given volume. The main conse-quences are that Xenondata DHEX units are designed for medium capacities and in one unique piece related to trans-portation requirements.Additionally exploiting the double heat exchanger and the double humidification ramp Xenondata can start the second adiabatic ramp even when outside is very cold and normally the indirect freecooling would have been enough to cool the internal air.

The immediate benefit is a saving in the external fans power consumption. In fact, their speed can be significantly re-duced (70% less speed for the same operating condition).The main drivers to chose Xenondata solution with DHEX are the following:

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• Supply temperature to the server: As written before ASHRAE has progressivly enlarged the zones the servers can work in. On the other side ASHRAE within the Whitepaper "2015 Thermal Guidelines for Data Processing Envi-ronments” is also highlighting the connection between server air intake temperature and server fans' consumption.

As clearly shown from the 2 curves above the severs fans' consumption would be lower if the air in front of them is colder. Additionally in the same whitepaper also a curve for the airflow is reported:

Also in this case lower temperature means lower airflow. Summing the two aspects designing a room with lower set-point would mean also higher Delta T as for the same server capacity the airflow needed would be reduced.Generally this means for an air conditioning system the need of a more challenging design. Xenondata with DHEX design viceversa thanks to great evaporative capacity can perfectly match these design requirements.

• Locations: Xenondata with DHEX design optimizes the consumption of outside fans thanks to higher evaporative

effect. Therefore it can extend and make convenient the use of the evaporative technology even on places with strong summer and challening extreme wet bulb temperatures.Here a chart resuming the behaviour of Xenondata efficiency level with Single and Double heat exchanger designs based upon different locations and a design supply temperatures in front of the server of 21°C.

Data Center 500 kW with 3+1 units all in operation. 21°C Supply Temperature in front of the servers. Delta Tempera-ture across the servers 15K.

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• Top Up Cooling: Xenondata with DHEX reduces or even cancel completely the need of a top up cooling. It's also true that the more compact dimensions allow to install a limited capacity, which anyhow is generally more than enough to cover the peak of the summer operation.Resuming all the aspects just explained Xenondata with double heat exchanger thanks to the maximized evaporative effect allows to extend the application of indirect evaporative freecooling even in places and with supply temperatures (lower or equal to 23°C) where generally a similar technology suffers.

Water Storage and Pumping SystemAs evaporative cooling units exploit water to cool the air it’s a recommended and common practice to build water storage and dedicated pumping system to cover possible water shortage from the main water distribution system. These water storage has to be thermally protected being using pure water (no Glycol is used in adiabatic / evaporative systems) or they have to be drained out once the external temperature falls below a certain threshold (generally in those periods the unit will be working in full freecooling mode). There can be different choices:• Either one unique water storage system with a dedicated pumping solution (which has to be redundant generally)• Or a solution with a small tank dedicated to every unit to maintain the N+X configuration To keep at minimum the water storages Xenondata offers the opportunity to minimize the water consumption during the water outages period (through a dry contact connected to the BMS system advising about the water shortage peri-od). In those periods the Top-Up cooling will be used with priority over the evaporative systemthus reducing the water consumption.

Unit Sizes and TrasportationXenondata is available in three different layouts:• DHEX - Vertical Layout (the two heat exchanger placed one above the other)• DHEX - Horizontal Layout (the two heat exchanger placed one next to the other)• SHEX - Horizontal Layout (one heat exchanger with horizontal Data Center air direction) The layouts have been than deployed in different sizes to best suit the different transportation and installation needs, having in mind the target to minimize the overall costs from the transportation out of the factory to the end of the unit life.

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DHEX - Vertical Layout - Size 90 - Xenondata 90.2 (Right/Left)

The unit has been designed to maximize the air to air heat exchange and optimize the water distribution in the ex-ternal air stream as well as the evaporative effect. The unit dimensions allow to transport 2 units with a single meg-atrailer truck.

DHEX - Horizontal Layout - Size 110 – Xenondata 110.2 (Right/Left)

This size has been designed to make one unit fully transportable inside a high cube container. This allows to optimize transportation in all places around the world.

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DHEX - Horizontal Layout - Size 130 – Xenondata 130.2 (Right/Left)

This Xenondata size has been thought to get the maximum capacity at the lowest transportation costs. Two units can in fact perfectly fit in a megatrailer truck and therefore optimize the number of trucks and minimize the logistics costs.

DHEX - Horizontal Layout - Size 180 – Xenondata 180.2 (Right/Left)

This is the largest size with double heat exchanger solution which can be shipped in one piece. The unit is therefore having the biggest dimensions which can be transported with trucks with low bed trailer and with exceptional trans-port which doesn't need special permissions.

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SHEX - Horizontal Layout - Size 150 – Xenondata 150.1 (Right/Left)

This is designed to allow the transportation of 2 units in one megatrailer truck. Separate delivery for the external fans sections. They can be stuck one above the other and optimize the entire project transportation cost.

SHEX - Horizontal Layout - Size 210 – Xenondata 210.1 (Right/Left)

This is designed to allow the transportation of 1 unit within one megatrairler truck. The units will be delivered in three pieces ensuring the complete tightness of the Data Center path.

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SHEX - Horizontal Layout - Size 270 – Xenondata 270.1 (Right/Left)

This is designed to allow the transportation of 2 units within three trucks. The transport can be done using low bed trailer with normal width. The units will be delivered in three pieces ensuring the complete tightness of the Data Center path.

SHEX - Horizontal Layout - Size 330 – Xenondata 330.1 (Right/Left)

This is designed to allow the transportation of 2 units within three trucks. The transport can be done using low bed trailer with special transport (for the exeeding width) anyhow without the need of ad hoc permissions. The units will be delivered in three pieces ensuring the complete tightness of the Data Center path.

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Xenondata solutions to suit different applications requirementsVertical Layout – Perimeter installation with Hot Raised Floor

The unit can easily match a Data Center application in terms of air distribution having a room layout with Hot Aisle Containment, the cold air spread through perimeter wall grills and using the hot raised floor to duct back the hot air.Hot raised floor although not yet a common application can be an extremely interesting opportunity whenever the raised floor is present and there is the need to maintain the room cold (presence of other devices out of rows) while exploiting the benefits of the separation between cold and hot. In fact, in similar cases there will be not the need of building any additional hot channel and false ceiling to duct back the hot air to the cooling system.

Horizontal Layouts – All Sizes – Roof and Perimeter Installation

Xenondata DHEX - Horizontal layout – Perimeter installation with Hot Aisle Containment

Xenondata DHEX - Horizontal layout – Roof installation with Hot Aisle Containment

On site the units can match both a roof or a perimeter installation either with raised floor or not. The unit suit the hot aisle containment as well as cold aisle containment.In case of perimeter installation the unit shall sit on a base module and use it as air channel to bring back the fresh air to the data room.

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Xenondata SHEX - Horizontal layout – Perimeter installation with Cold Aisle Containment

Xenondata SHEX - Horizontal layout – Roof installation with Cols Aisle Containment

Xenondata control includes a number of different control strategies to optimized airflow control and distribution for all applications with containerized cold or hot. (see dedicated chapters)

DHEX Horizontal Layout – All Sizes – Application for Containerized Data CenterThe horizontal layout with double heat exchanger can additionally be customized with ad hoc air distribution paths directly on the unit base. This allow to install it on the roof of the container and directly plug in fresh air.

Xenondata DHEX - Horizontal layout – Roof installation on containerized Data Center

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PRODUCT DESCRIPTIONDirectivesThe product is in compliance with the following European Union Directives:• Machinery Directive 2006/42/EC• Directive 2004/108/EC for Electromagnetic compatibil-

ity (EMC)• Low Voltage Directive (LVD) 2006/95/EC• Pressure Equipment Directive (PED) 2014/68/EC

Unit Frame and PanelsThe unit’s frame structure is built with thermal cut alumin-ium profiles and fiber glass - reinforced nylon angle bars.The unit’s casing complies with the following characteris-tics:• Air-tightness: class L1 in accordance with EN1886, in

both negative (-400 Pa) and positive pressure (+700 Pa);

• Thermal transmittance: class T2 in accordance with EN 1886;

• Thermal bridging factor: class TB2 in accordance with EN 1886;

• Casing strength: class D1 in accordance with EN 1886;• Filter bypass: class F9 in accordance with EN 1886;• Fire resistance: class A1 in accordance with EN 13501-

1;• The unit panelling is built with sandwich panels with an

insulation thickness of 60 mm (density 60kg/m3);• The external shell of the panel is built with pre-painted

galvanised sheet steel, colour RAL7035, smooth finish;• The internal shell of the panel is built with hot galva-

nised sheet steel;• The rock wool insulation is protected with a film of alu-

minium, to prevent the release of particles of the insu-lating material into the handled air;

• All of the parts that come into contact with water, there-fore the internal metalwork of the section containing the air to air heat exchangers and the condensate col-lection trays, are be built entirely of AISI 304 stainless steel (X5CrNi1810 in accordance with UNI/EN 10088).

Draught seals of adequate thickness is applied on all of the contact surfaces between structure and panels and between sections, to guarantee air-tightness.

Heat ExchangerPlate heat exchangers enable the transfer of heat be-tween two air-flows operating at different temperatures. Compared to other technologies available for evaporative freecooling the plate heat exchanger offer the following benefits:• Complete separation of flows avoiding any possible con-

tamination between internal and external air;• Absence of moving parts thus reducing failures risks;• Minimal maintenance required;The choice than between polymer and aluminum heat ex-changer is in favor of this second one for the following reasons:• High durability and greater operating efficiency;• Will not break or crack compared to polymer heat ex-

changers;• If scaling does occur, the heat exchanger can be pres-

sure washed;• Fully recyclable & environmentally friendly;• High performance coatings are applied in the factory to

all heat exchangers.

Xenondata units are using heat exchanger with following important characteristics:• Eurovent Certification;• Ad hoc heat exchanger surface treatment to improve

Adiabatic/Evaporative effect thanks to a better water distribution on the complete heater exchanger surface;

• No delamination (in according with ECCA T6);• M.E.K. resistance (polymerization evaluation): #m+#

50 double rubs (in according with ECCA T11);• Improved corrosion resistance: up to 1500 hours of ex-

position to neutral salt spray fog (ASTM B117) and eval-uation of the results by using the ‘ASTM D 610’ norm;

• Improved operating range -30°C / +90°C without de-lamination risks;

Evaporative – Humidification SectionThe water is distributed on the heat exchanger through several rows each including multiple sprinklers. This al-lows to properly wet the entire heat exchanger surface. This water evaporating is the driver of the evaporative ef-fect.The water not evaporated is collected on a stain less steel water basin and then receirculated on the distribution sys-tem through N+N water pumps.

The internal metalwork of the section containing the heat exchangers and the humidification devices, as well as the condensate collection trays are entirely made of AISI 304 stainless steel (X5CrNi1810 in accordance with UNI/EN 10088).The unit is provided with transparent ABS inspection hatches, for the visual inspection of the humidifier ramps. Additionally there are lamps(with protection rating IP67) which allow a further visibility of the section in case of any maintenance action needed.

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EC Radial FansThey are made of composite material. This technology al-lows keeping the same high-strength of aluminum alloy adding the benefits of light weight and full flexibility on blade design of the new material.Xenondata has been designed to get from them the high-est energy efficiency exploiting all their advantages. A typical behavior of these fans is to exponentially increase their efficiency at part load. This is linked to the cubic relationship between speed and consumption that these fans have.

The position of the fans in the unit has been as well op-timized taking in account the needs of the Data Center application. On the Data Center side the fans are on the return air. This has two important advantages:• The heat gain of the fans is before the heat exchanger

so it contributes to increase the delta temperature be-tween return air and external air. This is more efficient than having the fans on supply side, thus increase the temperature before the delivery to the servers.

• As the fans blow to the heat exchanger the heat ex-changer on the Data Center side is kept on positive pressure. Therefore even on the rare case of a leakage on the heat exchanger, this design is Fail Safe. In fact, in such remote case the leakage will be from the Data Center to the outside thus avoiding any contamination for the Data Center air.

FilterXenondata is available as standard with G4 (according to CEN EN-779-2012 - corresponding to EU4 Eurovent BSEN- 779-4/5 - MERV8 following ASHRAE 52.2 - 35% by ASHRAE 52.1) on Data Center side and G2 (accord-ing to CEN EN-779-2012 - corresponding to EU2 Eurovent BSEN- 779-4/5 - MERV4 following ASHRAE 52.2 - 20% by ASHRAE 52.1) on the external air path. Thus ensuring the proper filtration for the servers as well as ensuring to keep cleaned the external part of the heat exchanger. Xenon-data monitors continuously the filter status and provide dedicated Clogged Filter message in case any other filter needs to be changed.Higher filtration grades as available as well as accessories to meet more challenging application requirements. The unit fitted with generously sized EC Fan can in fact easily cover the incremental pressure drop of higher filtration grades.

The presence of the EC Fan as well as the advanced con-trol routines embedded in the software allows a proper unit reaction in case the filters progressively becomes dirty, to ensure the site always operate with the proper airflow management.

Top Up Direct Expansion or Chilled Water Cir-cuitIn case the application or the climate profile of the site of installation requires the presence of a Top-Up cooling, Xe-nondata can be made available with a complete DX circuit embedded on it or a Chilled Water coil to be connected to an external Chilled Water source (as a chiller).The refrigerant circuit is characterized by the presence of a single or tandem or multi compressors (based on the unit size). In case of tandem or multi compressors solu-tions, one BLDC is always present to exploit all the bene-fits of the modulation capacity (see next chapter for more details).The chilled water circuit comprises a 2 or 3-way modulat-ing valve with 0-10V servo control that controls environ-mental conditions by metering the flow of water running through the exchange coil.

Compressor BLDCIn comparison to a compressor with asynchronous motor, a compressor with brushless motor (BLDC motor or PMDC motor) has a rotor containing permanent magnets. These make it intrinsically more efficient thanks to the magneti-zation energy saving of the rotor and to the fact that there are no rubbing parts.

20% 40% 60% 80% 100% 120%

Load

η

BLDCcompressor AC

compressor

As can be seen in the diagram, a brushless motor is more efficient than a normal asynchronous motor and its efficiency reaches its maximum when the compressor is working under partial load conditions. It can also be seen that, since it is specially built to also operate at low speeds, a BLDC compressor has a wider speed adjustment range than a conventional compressor controlled through an AC inverter.Therefore the use of the BLDC compressor is a perfect choice for this application. In fact, as already underlined the efficiency at part load is a key requirement for a unit operating within a Data Center application. In particular if we consider that the DX Top-Up requirement can be just a little portion to really cover just the few missing kW in the peak of the summer operation.

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Extremely important is also the fact that a continuous and precise control of the supply air temperature to the serv-er is fundamental. The use of a flexible cooling device as BLDC compressor is also for this reason a must for these type of units.

Electrical PanelThe unit is provided with integrated or separate electrical panel based upon unit design. In case it's with fitted with separated electrical panel the unit will be also ready with quick connectors to connect it to all units components, devices and sensors.The electric panel complies with the norm 204-1 IEC.The electrical control panel of the basic unit comprises:• Main disconnect switch;• Automatic circuit breakers for protecting the fans and

auxiliary circuits;• Automatic circuit breakers for the adiabatic humidifier;• Automatic circuit breakers for compressors with fixed

calibration (if present);• Phase monitor;• Potential-free general alarm contacts;• Contactor for on/off compressor (if present);• Single potential free operating contacts for fans and

compressors (if present);• Microprocessor controller with display accessible from

the outside;All the electrical cables inside the panel are numbered.The power supply of the unit is 400V/3~+N/50Hz.

DampersThe Data center return air damper and (for DHEX units) the outdoor side dampers are at least leakage class 2 in accordance with EN 1751-1999. The dampers feature ON/OFF electric servo-motors with spring return.

ControlThe microprocessor control allows the following functions:• Supply air control with dedicated set point and propor-

tional band;• Multiple options for controlling the Data Center airflow;• Recording of the log of all machine inputs, outputs and

states;• Recording of the alarm log;• Digital input for general ON/OFF;• USB port (to allow easy software and parameters up-

load and download);• Ethernet port with integrated Web Server.The unit can allow to monitor working conditions as well punctual efficiency (accessory needed).

Controls and Safety DevicesThe units are fitted with the following control and safety components:• Antifreezing routines to avoid any risk at low external

temperatures;• Complete management of evaporative water (loading,

safety starting, antilegionella and anti-scaling cycles, draining once the unit is off);

• Airflow pressure transducers;• Clogged filters pressure switches, both for data center

air filters and external air filters;• Over temperature protection for fans and compressors

(If DX present);• High pressure switch with manual reset (If DX present);• High pressure safety device with automatic reset, for a

limited number of occurrences, managed by the con-troller (If DX present);

• Low pressure safety device with automatic reset and limited tripping managed by the controller (If DX pres-ent);

Xenondata: Functions and Solutions Designed to Perfectly suit the Data Center ApplicationXenondata has been designed to meet the different Data Center needs in terms of airflow distribution and control. Xenondata controls the supply air temperature acting on the external fans, on the evaporative device and in case on the Top-Up cooling device.The Data Center airflow management is available in dif-ferent solutions:

Airflow ControlXenondata can also measure and control the airflow. The airflow can be linked to the return air temperature (which is directly linked to the heat load) and increase or decrease the fan speed in order to get the proper air-flow required based on the specific return temperature from the Data Room.In case there is system made of multiple units, the mul-timaster logic ensure the system control optimization as well as the best energy consumption for the site.

Pressure Control (Available once proper hardware accessory is selected)Xenondata can be made available with pressure sen-sors. The pressure sensor can be used to control the supply air pressure (ESP) of the unit and modulate the Data Center air in order to maintain a constant value. The multimaster ensure that in case of system of mul-tiple units the complete system operate homogenously optimizing the overall consumption at system level.The pressure sensor can also be installed to keep a small positive (i.e. >5 Pa) Delta Pressure between two zones of the data room (i.e. Room and Hot Raised Floor; room and hot ceiling) accordingly to the specific room layout and the air distribution needs.For further details on available functions and on dis-played information, you can refer to the specific docu-mentation of the control.

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Multimaster – Translate Redundancy into Effi-ciencyXenondata use technologies like EC Fan and BLDC com-pressors which exponentially increase their efficiency at part load. Distributed airflow in addition to direct lower consumption means also lower air pressure drop on the ducts. Similarly the temperature at which the unit can run in full Freecooling raises smaller is the load to be covered unit by unit.The sum of these effects make the indirect evaporative cooling units a technology which can reach unmatched level of efficiency at part loads.Therefore in typical Data Center application where redun-dancy is a must (N+1 or N2 or even N+N) the multimas-ter solution which allow the complete system to work as one unique and big efficient cooling unit is an extremely important feature to provide the lowest pPUE for the in-stallation.

Human-Machine InterfaceThe control has a graphic display that allows the following information to be displayed:• Data Center air inlet and outlet temperature;• Set temperature and differential set points;• External air temperature and humidity;• Description of alarms;• Unit synoptic view;• Hour meter of operation and number of start-ups of the

unit, the compressors (if present);• High and low pressure values, and relevant condensing

and evaporating temperatures (if present);

Xenondata – Unit ready for MonitoringAs standard the advanced unit control allow to have Mod-bus (RJ485) and Ethernet with embedded web server preloaded web page.

The Added Value of the WebserverAs standard, the Xenondata controller integrates a web-server with a preloaded web page that is accessed via password. The web page allows the following functions to be carried out (some of these are available only for users with advanced level rights):• Display of the main functions of the unit such as unit

serial n°, size, refrigerant;• Display of the general status of the machine: air inlet

and outlet temperatures, outside air temperature and humidity, working mode;

• Display of the status of compressors, fans, pumps, elec-tronic valves;

• Display in real time of the graphs of the main param-eters;

• Display of alarm log;• Management of users on several levels;• Remote ON/OFF;• Remote set point change;• Remote time band change;

Websever is therefore a great opportunity to have an easy, clear and comprehensive view of the en-tire unit without the need of expensive investment in additional monitoring systems.

TestingAll the units are factory end of line-tested and in case of Direct Expansion Top Up cooling supplied complete with oil and refrigerant.

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DESCRIPTION OF ACCESSORIESThe "(S)" symbol indicates that the option is present as standard in the unit, provided this is not in conflict with other selected accessories.

CFI Top Up Direct Expansion CircuitIn case the Top Up Direct Expansion Circuit is required the refrigerant circuit comprises:• Electronically-controlled expansion valve;• Refrigerant liquid flow indicator;• Solid cartridge refrigerant filter;• High pressure safety pressure switch with manual reset;• Low pressure switch with automatic reset;• Copper refrigerant pipes with anti-condensation insulation on the suction line;The evaporator coil is finned coil, with copper tubes and aluminum fins with hydrophilic surface treatment. The fin profile is specially designed to prevent carry-over of condensation even at high through speeds. A stainless steel condensate collection basin is installed at the base of the coil, complete with fitting for drain and siphon. The evaporator is situated after the second heat exchanger on the data center air stream and provide the latest supply control in case the adiabatic cooling is not enough.The condenser coil finned coil, with copper tubes and aluminum fins. The coil is situated on the external air path after the second heat exchanger.Both coils are optimized for use with refrigerant R410A.The refrigerant circuit is completed by the presence of a single or tandem or multi compressors (based on the unit size). In case of tandem or multi compressors solutions, one BLDC is always present to exploit all the benefits of the modulation capacity.

Compressor and Circuits Top Up Nominal Nominal Capacity (1)

[kW]

X90.2 1_1 44

X110.2 1_1 52

X130.2 1_1 50

X150.1 2_1 74

X180.2 2_1 91

X210.1 2_2 115

X270.1 2_2 130

X330.1 4_2 160

(1) For Direct Expansion Top UP Cooling: 36°C – 24°C; 9 g/kg – Where Top Up is cover-ing 30°C - 24°C

ANTC Epoxy Coating for Condenser CoilThe condenser coil can be available with epoxy treatment for application close to the sea or in particularly severe external envoironments, in terms of air pollution.

BR3S_BR2S Top Up Chilled Water CircuitThe chilled water circuit comprises a 3-way or 2-way valve the choice can be made before ordering the unit. The controlling valve is coupled with modulating 0-10V servo control that controls environmental conditions by metering the flow of water running through the exchange coil. The servomotor 0-10V is almost a must for similar application being controlled based on supply temperature and therefore requiring a precise and fast action on the flow.

Max Design Pressure of Chilled Water circuit

PN16

Max Closing Pressure of the ser-vomotor

200 kPa

Running time of the servomotor 35 s

The chilled water coil is finned coil, with copper tubes and aluminum fins with hydrophilic surface treatment. The fin profile is specially designed to prevent carry-over of condensation even at high through speeds. A stainless steel condensate collection basin is installed at the base of the coil, complete with fitting for drain and siphon.

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Water Pressure Drop(1) Water Flow(1) Top Up Nominal Nominal Capacity (1)

[kPa] [l/s] [kW]

X90.2 45 2,02 42

X110.2 38 2,40 50

X130.2 38 2,40 50

X150.1 55 3,38 71

X180.2 64 4,69 98

X210.1 55 4,78 100

X270.1 32 6,50 131

X330.1 53 7,69 162

(1) For Chilled Water Top UP Cooling: 36°C – 24°C; 9 g/kg – Top Up Cooling covering 30°C - 24°C with water 15/20°C

CUM Complete Data Center Control – Control for External HumidifierIn case of external fresh air delivered in the room (generally from ad hoc solutions active once people is pres-ent in the Data Room) or not totally tight room insulation versus the outside, there can be the need of humid-ification during the coldest seasons. In fact, in those periods the external environment is much drier compared to the low humidity limits stated in the latest ASHRAE recommended area.Xenondata can be available with analogue signal to properly control an external humdifier.

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Aeraulic accessoriesThe "(S)" symbol indicates that the option is present as standard in the unit, provided this is not in conflict with other selected accessories.

FF6 Filters with Higher Filtration Grade (M6)For the Data Center air side, in case of specific site requirements higher filtration grade might be required. Xenondata is available with option for M6 (according to CEN EN-779-2012 - corresponding to EU6 Eurovent BSEN- 779-4/5 – MERV12 following ASHRAE 52.2 - 75% by ASHRAE 52.1).

FF7 Filters with Higher Filtration Grade (F7)For the Data Center air side, in case of specific site requirements higher filtration grade might be required. Xenondata is available with option for F7 (according to CEN EN-779-2012 - corresponding to EU7 Eurovent BSEN- 779-4/5 – MERV13 following ASHRAE 52.2 - 85% by ASHRAE 52.1).

CPA Delivery Data Center Air PressureXenondata can be made available with pressure sensors. The pressure sensor can be used to control the supply air pressure (ESP) of the unit and modulate the Data Center air in order to maintain a constant value. The multimaster ensure that in case of system of multiple units the complete system operate homogenously optimizing the overall consumption at system level.

Min ESP 0 PaMAX ESP 100 Pa

Above values refer to the sensor control range. Values that units can achieve depends on the site application and layout.

CPR Data Center Remote Delta PressureXenondata can be made available with remote differential pressure sensor. The pressure sensor can be in-stalled remotely in the room to keep a small positive (i.e. >5 Pa) Delta Pressure between two zones of the data room (i.e. Room and Hot Raised Floor; room and hot ceiling) accordingly to the specific room layout and the air distribution needs.

Min ESP 0 PaMAX ESP 100 Pa

Above values refer to the sensor control range. Values that units can achieve depends on the site application and layout.

EAS External Air Delivery from the Top (Only for SHEX)In case Xenondata with SHEX design is required to be ducted on the external process air discharge, the fan section can be made available with lateral panels, which allow to duct it on the top.

SEMM Spring Return Damper on Data Center air delivery sideIf needed from the site application, Xenondata can be made available with a motorized spring return On/Off damper on the Data Center air delivery side. This allows to insulate the Data Center air path in case the unit is without power.

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Electrical accessoriesThe "(S)" symbol indicates that the option is present as standard in the unit, provided this is not in conflict with other selected accessories.

PBU Controller Power Backup for Fast ReStartCooling recovery after power outage can be an extremely important factor in Data Center applications. Xe-nondata has been designed with a proper software solution to allow an immediate restart once the power is back. To allow this the unit control must be kept alive during the power off. With this solution the unit would be ready to run again having kept under control all sensors and all devices.The controller power backup (the backup will be available for 60/120 seconds depending on the unit charater-istics) has been designed exactly for this purpose.

DAA Dual Power SupplyXenondata can include an automatic transfer switch which allow the unit to perfectly match applications with two separate power supply lines (for example, one from the mains power line and one from the uninterruptible power supply unit). The ATS is installed in the main electrical control panel.The switching from one line to another is automatic and obligatorily requires passing through the OFF position. This means that unit performs a complete restart routines once passing from one line to the other.To cut the transition time linked to the restarting routine the unit can be ordered as well with controller power backup solution which keeps alive the unit control board and therefore allow for a fast restart.

ENM Energy MeterYou can know only what you measure, and you can improve only what you know. Xenondata can be made available with Energy Metering solution. This allow to keep under control unit and system operation and to monitor how the efficiency of the installation evolves time after time and based on different working conditions.Based on that decisions can be taken to run the complete system in the most efficient way.

FUOC Fire SensorThe sensor is a thermo-differential sensor and can perceive the speed with which the temperature is rising so as to react quickly to the currents of hot air from a fire. It can protect an area of 49m2 (7x7).

FUMO Smoke SensorThe sensor is an optical sensor and is approved at national level by the Interior Ministry while at international level it has been type approved in conformity with harmonized European regulations CEN EN 54 part 7 and 8. It can protect an area of 81m2 (9x9).

REFF Relais Smoke and/or FireClean contact available for customers to connect their own fire/smore sensors. Unit behaviour will be the same as per their own sensors.

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Hydraulic accessoriesThe "(S)" symbol indicates that the option is present as standard in the unit, provided this is not in conflict with other selected accessories.

FLM Flow MeterOn evaporative freecooling the water consumption is a key parameter to determine the overall system efficien-cy and the total cost of ownership. With flow meter Xenondata can measure punctual water consumption and provide an important information on the actual unit operation.

SAL Flooding Alarm SensorA sensor to detect water losses and base on that raise a proper alarm is available within the unit accessories. Further sensors can be connected on request to allow the control of several areas.

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Installation accessoriesThe "(S)" symbol indicates that the option is present as standard in the unit, provided this is not in conflict with other selected accessories.

PIE Unit for External Installation: Unit Protecting Roof (Only for DHEX units)In case of DHEX units to be externally installed they can have a dedicated protecting roof, properly designed to grant the protection IP54, as well as to avoid any water stagnation.

CUFA Process Air Side Anti-intrusion grill and Rain cover (Only for DHEX units)The grill can help to stop leaves and small animals – birds which might damage the unit efficiency in case the air inlet / Outlet of the external air is not ducted.It can also happen that external rain can wet the external air filters. This will not affect unit punctual opera-tion, efficiency and consumption. Anyhow in the long term can partially reduce filter life. Rain cover can help in reducing this situation.

AG Rubber anti-vibration mountsThese allow you to reduce the vibrations transmitted from the unit to the surface it is standing on. Accessory supplied loose.

AM Spring anti-vibration mountsThese allow you to reduce the vibrations transmitted from the unit to the surface it is standing on. Accessory supplied loose.

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Network accessoriesThe "(S)" symbol indicates that the option is present as standard in the unit, provided this is not in conflict with other selected accessories.

GLO LonworksOnce this accessory is selected the user can access in read and write mode using Lonworks protocol. The unit in such case is provided with the proper gateway to allow the proper communication.

PBA BACnet protocol over IP (Ethernet)Once this accessory is selected the controller is set for use, in read and write mode, of the BACnet port on IP protocol.

PMO Modbus protocol over IP (Ethernet)Once this accessory is selected the controller is set for use, in read and write mode, of the Modbus port on IP protocol.

SCAD Advanced Graphic Display (15”)An advanced graphic display with an extremely clear and intuitive graphical design is available and allow a more user friendly customer experience in keeping under control unit and components operation.

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TECHNICAL SPECIFICATIONSXenondata X90.2 X110.2 X130.2 X150.1 X180.2 X210.1 X270.1 X330.1Width mm 2400 2190 2300 2400 2800 2400 2400 2800Height mm 2800 2400 2800 3500 3500 4600 5300 5300Length mm 4800 7100 8200 5000 9300 6000 6500 6500Nominal Net Cooling Capacity (1) kW 90 110 128 150 180 210 270 330Top Up Nominal Capacity (2)

(3) kW 44 52 50 75 91 115 135 161Nominal DC Airflow m3/h 23300 28400 33000 38800 46600 54300 70000 85500Max DC Airflow m3/h 30000 31000 33000 44000 46600 78000 85000 117000Max Net Cooling Capacity (1) kW 116 120 128 170 180 300 330 450Data Center Fans Diameter & Qty mm x Nr 630 x 2 630 x 2 500 x 3 500 x 4 560 x 3 560 x 6 560 x 6 560 x 9External Fans Diameter & Qty mm x Nr 630 x 2 630 x 2 500 x 3 500 x 4 560 x 3 560 x 6 560 x 6 560 x 9(1) Data Center Side: 39°C – 25°C; 9 g/kg ;(2) Data Center Side: 39°C – 25°C; 9 g/kg ; Top Up DX cooling covering 30°C - 24°C(3) Data Center Side: 39°C – 25°C; 9 g/kg ; Top Up CW cooling covering 30°C - 24°C - Water 15/20°C

ELECTRICAL SPECIFICATIONSSize LRA FLA LRA FLA

Without DX Without DX With DX With DX

X90.2 1 A 32 A 32 A 54 A

X110.2 1 A 25 A 25 A 49 A

X130.2 1 A 34 A 34 A 58 A

X150.1 1 A 46 A 170 A 81 A

X180.2 1 A 48 A 211 A 94 A

X210.1 1 A 96 A 294 A 151 A

X270.1 1 A 96 A 294 A 154 A

X330.1 1 A 144 A 350 A 231 A

OPERATING LIMITS Min MAX

Data Center Return Air 18°C - (45% - 60%) 45°C – (10% - 25%)

Data Center Supply Air 18°C - (45% - 60%) 30°C – (10% - 25%)

External Air -30°C +50°C DB - 30°CWB

Data Center Air limits can be influenced by the load needed and the application constrains. External Temperature limits referred to application with at least 25% heat load and water for evaporative cooling available.

NOISE LEVELSSize Internal Air Return Duct

SideInternal Air Supply Duct

Side External Air Duct Side

SPL @ 5m dB(A) SPL @ 5m dB(A) SPL @ 5m dB(A)X90.2 57.4 63.4 68.4X110.2 60.3 66.5 68.3X130.2 67.0 73.1 73.8X150.1 70.8 73.0 76.2X180.2 70.9 76.2 76.6X210.1 71.5 77.8 83.2X270.1 71.7 78.0 83.6X330.1 76.8 82.1 91.0Noise calculated at nominal working conditions. Noise referred to ISO3744 based on Lw5 and Lw6 DIN 46 635

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INSTALLATION ADVICEThe units described in this document are, by nature, strongly affected by the characteristics of the system, the working conditions and the installation site.Remember that the unit must be installed by a qualified and skilled technician, and in compliance with the national leg-islation in force in the destination country.The installation must be done in such a way that it will be possible to carry out all routine and non-routine maintenance operations.Before starting any work, you must carefully read the “Installation, operation and maintenance manual” of the machine and do the necessary safety checks to prevent any malfunctioning or hazards.We give some advice below that will allow you to increase the efficiency and reliability of the unit and therefore of the system into which it is inserted.

Water characteristicsTo preserve the life of the exchangers, the water is required to comply with some quality parameters and it is therefore necessary to make sure its values fall within the ranges indicated in the following table:Total hardness 2,0 ÷ 6,0 °fLangelier index - 0,4 ÷ 0,4pH 7,5 ÷ 8,5Electrical conductivity 10÷500 µS/cmOrganic elements -Hydrogen carbonate (HCO3-) 70 ÷ 300 ppmSulphates (SO42-) < 50 ppmHydrogen carbonate / Sulphates (HCO3-/SO42-) > 1Chlorides (Cl-) < 50 ppmNitrates (NO3-) < 50 ppmHydrogen sulphide (H2S) < 0,05 ppmAmmonia (NH3) < 0,05 ppmSulphites (SO3), free chlorine (Cl2) < 1 ppmCarbon dioxide (CO2) < 5 ppmMetal cations < 0,2 ppmManganese ions (Mn++) < 0,2 ppmIron ions ( Fe2+ , Fe3+) < 0,2 ppmIron + Manganese < 0,4 ppmPhosphates (PO43-) < 2 ppmOxygen < 0,1 ppm

Glycol mixturesOnly for Chilled Water circuitWith temperatures below 5°C, it is mandatory to work with water and anti-freeze mixtures, and also change the safety devices (anti-freeze, etc.), which must be carried out by qualified authorised personnel or by the manufacturer.Liquid outlet temperature or minimum ambient temperature

°C 0 -5 -10 -15 -20 -25 -30 -35 -40

Freezing point °C -5 -10 -15 -20 -25 -30 -35 -40 -45Ethylene glycol % 6 22 30 36 41 46 50 53 56Propylene glycol % 15 25 33 39 44 48 51 54 57

The quantity of antifreeze should be considered as % on weight

TC_0

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Blue Box Group S.r.l.Via Valletta, 5 - 30010Cantarana di Cona, (VE) Italy - T. +39 0426 921111 - F. +39 0426 302222www.blueboxcooling.com - info@bluebox.it

Blue Box Group S.r.l. a socio unico - P.IVA 02481290282Company directed and coordinated by Investment Latour (Sweden)