Room Air Conditioners

Engineering Data Manual

Uniflair LEHDCV Chilled Water air conditioning units with underfloor fans

160 - 200 kW

Make the most of  your energyTM

Uniflair LE - HDCV Contents

General introduction 5

Main components 11

Technical Data 23

Technical Drawings 42

3

Uniflair LE - HDCV General introduction

Basic unit

HDCV - Single and Dual coil series

Introduction 6

Main functions 7

Available Options

Power Supply 8

Fan Module Configuration Options 8

Plenum and Floor Stands 8

AFPS (Automatic Floor Pressurization System) 9

Other options 9

5

General introduction Basic unit HDCV - Single and Dual coil series

Introduction The Unit is made of two sections to grant installation of fan module under or

above the raised floor and to increase the coil surface for energy efficiency

maximization.

The units designed for modern Data Centers are optimized for Underfloor

fan module installation in order to minimize power consumption.

The units can be configured for installation above the raised floor choosing

the fan module configuration.

Thanks to their optimized design and extensive laboratory testing, these

units provide reduced electrical absorption, a greater ability to maintain

elevated efficiency levels even at partial loads, rationalized regulation and

the possibility to communicate with a wide range of supervision protocols.

The units have been designed and optimized according the latest ASHRAE

trends. Airflow requires a room layout which features hot and cold aisles.

In the suction section of the rack (cold aisle) the air temperature must be

maintained at a constant level for the whole height of the rack; a temperature

between 18°C and 27°C depending on the manufacturer, while the hot

aisles located at the discharge section of the rack have a temperature

between 30 and 38°C depending on the active thermal load.

Humidity has to be maintained inside an envelope identified by a max rH of

60%, and dew point temperature between 5,5°C and 15°C.

Particular attention has been paid to reducing fans energy consumption

by optimizing the aeraulic circuit and by using fans with electronically

commutated motors. These solutions are integrated with a sophisticated

air flow management system and underfloor pressure control.

6

Main functions Unit made of two sections in order to guarantee installation of fan module

under or above the raised floor and to increase the coil surface for energy

efficiency maximization.

■ Electronically Commutated EC Fans for efficiency maximization, statically

and dynamically balanced;

■ Large Surface Copper and aluminum cooling coil for pressure drop

minimization;

■ EC Fan Module equipped with circular plug in connectors for quick and

failure free installation; the module is supplied with safety protection

grilles on the sides in case of underfloor installation;

■ Adjustable fan speed regulation according to Energy saving and Load

Sharing logics;

■ Electric panel complying with EC standards (2006 /95 /EC and EMC

2004/108/EC directives), auxiliary transformer;

■ High efficiency pleated air filter housed in a metal frame and filter

differential pressure switch;

■ Low airflow differential pressure alarm switch;

■ Full frontal accessibility for maintenance;

■ Chilled Water Inlet Temperature measurement integrated in the

microprocessor;

■ Integrated Discharge Temperature Control and Room Moisture Control;

■ Immersed electrode Humidifier;

■ Electrical Heaters with aluminum finned heating elements;

■ Phase sequence control;

■ Line reactance for each compressor to stabilize the power supply;

■ Phase sequence control and minimum / maximum power supply and

voltage;

■ Single Coil: One chilled water circuit equipped with 2 or 3 Way valve

equipercentual integrated with the microprocessor with PID logic.

Regulation logic can be chosen according to different strategies for

energy efficiency maximization;

■ Dual Coil: Unit equipped with two separate chilled water circuits equipped

with 2 or 3 Way valve equipercentual integrated with the microprocessor

with PID logic. Regulation logic can be chosen according to different

strategies for energy efficiency maximization and for circuit operation;

■ Fan module 550mm high grilles on the frontal, back and sides, fully open

on the bottom;

■ Evoluted Microprocessor control system UG50 including:

□ local user terminal with external display

□ inlet chilled water temperature monitoring

□ integrated LAN card for connecting more than one unit to

the local area network

□ clock card integrated

□ integrated RS485 serial card for direct connection to external

BMS (Modbus)

□ Second slot for additional serial card for BMS connection (optional);

■ Microprocessor control system in addition allows:

□ management of double set-point from remote control

□ free-contact for general alarm and 2 for addressable alarms

□ remote ON-OFF switch

□ Possibility to Integrate with Uniflair Chillers through

Optimized Management Logic

□ ability to interface with main BMS protocols

7

General introduction Available options

Power supply ■ Single power supply

Standard arrangement

■ Single power supply with Ultra capacitor

Thanks to the presence of Ultacapacitor and an optimized logic, in case

of power loss the microprocessor is maintained active for a time duration

related to the charging time of the device, ensuring in this way a quick

start once power is restored.

■ Double power supply with automatic changeover

and Ultracapacitor

Thanks to this option the unit is suitable for installations on TIER III and

IV installations. The unit is fitted with an integrated electromechanical

automatic changeover with manual pre selection of the preferred line. The

unit automatically commutates to the active line. During the commutation

the control board works thanks to the presence of the Ultracapacitor and

a dedicated software logic of management.

Thanks to the presence of Ultacapacitor and an optimized logic, in case

of power loss the microprocessor is maintained active for a time duration

related to the charging time of the device, ensuring in this way a quick

start once power is restored.

■ User Terminal, RS485 serial card

The standard arrangement permits a direct connection to a BMSs based

on serial lines.

Fan Module Configuration Options ■ Fan Module Open on all sides suggested for installation Under the

Raised Floor

■ Fan Module Closed on all sides and open on the bottom suggested

for installation above the Raised Floor

■ Fan Module Open on the front suggested for installation with front

discharge required

■ Fan Module Open on the back suggested for installation with back

discharge required

Plenum and Floor Stands ■ High Efficiency Plenum including Bag Filters

The unit can be equipped with a 500mm plenum that includes high

efficiency bag filters minimizing the pressure drops and the fan power

consumption.

■ Filter grades

According to the filtration grade different codes are available, from EU4

to EU7

■ Air intake plenum (height 500 mm) installed between the top of the

unit and a false ceiling or to the air delivery channel.

■ Air intake plenum with high-efficiency air filters ranging from class

EU6 to class EU8.

■ Air intake plenum with motorized damper

■ Base frame for assembly on a raised floor. The main frame is adjustable

in height up to 600 mm

8

AFPS (Automatic Floor Pressurization System) ■ Automatic Floor Pressurization System can be configured as an

option mounted in the unit granting that the unit automatically adapts

to the variation of the room configuration granting the pressure required

under the raised floor;

Other options ■ Chilled Water Outlet Temperature measurement integrated in the

microprocessor can be chosen as an option

■ Filter option

■ Condensate drain pump

■ Energy meter

■ Packing suitable for container transportation

The unit is equipped with the device can be transported inside a standard

container.

9

Uniflair LE - HDCV Main Components

Coil Module Frame 12

Fan Module Frame 12

Fans 13

Cooling Coil 14

Box Type air filters 14

Plenum with Bag type Air filters 14

Low airflow and clogged filter alarm sensors 14

Hydraulic circuit 14

Humidifier 15

Electrical panel 16

Ultracapacitor 16

Electrical panel: double electrical supply (optional) 16

Microprocessor control - UG50 17

Energy Meter 18

Discharge Temperature Control and Moisture Control 18

Dehumidification with limitation of the cooling capacity 19

Fan speed Management 19

Dual Coil Regulation Logic 19

Optimized Management 19

AFPS 20

Optional accessories 21

Certification standards 21

11

Main components Main components

Coil Module Frame The structure of the coil module unit is characterized by a metal

framework and internal parts made from hot zinc plated sheet steel.

These profiles are connected together by structural rivets designed to

ensure sturdy assembly to withstand severe transport and handling

conditions. The units are also equipped with internal panels for shutting off

the compartments affected by the air flow, these are made from hot zinc

plated sheet steel and ensure:

• reduction in the noise transmitted through the panelling;

• air tightness even without external panels so that the units can operate

even with the doors open during servicing;

• the possibility of inspecting the internal elements without interfering

with the operation of the unit and, more importantly, with the unit in

operation.

The external panels are coated with RAL9003 epoxy-polyester paint which

guarantees long-term durability of the original features. The front panels

are attached to the framework by means of rapid coupling fasteners.

The standard panels are internally lined with heat and sound proofing

insulating material made of melamine covered by a protective film 20mm

deep, density 10 kg/m3.

Melamine is an exceptionally high-quality product, featuring a high fire-

resistance (class B1 according to DIN 4102, BS 476 part 7, VO according

to UL94, ASTM E84, class M1 according to NFP92-501) and excellent

sound-insulation properties.

As an option sandwich panels classified A1-DIN are available. These

panels are double skin with the external panel coated with RAL9003

epoxy-polyester paint, the internal insulation is 15mm deep and the internal

panel is hot zinc plated.

Fan Module Frame The structure of the fan module is characterized by a metal framework

and internal parts made from hot zinc plated sheet steel.

These profiles are connected together by structural rivets designed to

ensure sturdy assembly and to withstand severe transport and handling

conditions.

The module is equipped with internal separating panels between the fans

in order to optimize the airflow pattern and avoid unwanted turbulences.

The discharge section of the fans on the sides is equipped in case of

underfloor configuration with protective grilles that avoid unwanted injuries

to operators with unit in function.

The fan module can be configured according to the tipology of the

installation, underfloor or above floor and with back or front discharge.

The bottom discharge of the module is open and grille free.

The external panels are coated with RAL9003 epoxy-polyester paint which

guarantees long-term durability of the original features.

In the above floor fan module configuration, the side panels are closed and

sealed type screwed to the structure avoiding any leakage.

The fan Module is equipped with fast circular plug in connectors for quick

and failure free installation.

12

Fans The units are equipped with Single-inlet centrifugal fans with EC

(Electronically commutated) backward curved fan blades.

This type of fan has an aluminium impeller with a low moment of inertia and

an innovative vane profile. The directly coupled EC motor is three phase

with an external rotor, with IP54 protection grade, with the possibility of

continuous regulation of the speed by means of a 10V signal sent by and

integrated with the control. The fan impeller is statically and dynamically

balanced with lifelong-lubricated bearings. The fan is mounted on a support

which reduces the transmission of vibrations to the body of the appliance.

The fan speed can be selected to adapt the air flow to the head required

by the aeraulic system.

The EC fans, thanks to their innovative technology, guarantee lower

electrical absorption compared to all other types of fans available on the

market and a noise power level which is particularly low.

Units equipped with EC fans can also be equipped with an AFPS system

(Automatic Floor Pressurization System) which monitors the static pressure

under a raised access floor and automatically adapts the fan speed in order

to maintain the value which has been set. Such a solution can be used

to allow for extension over time in server rooms or to prevent “hot spots”

following maintenance which modifies the layout of the raised access floor.

Since they have particularly low electrical absorption, EC fans are the ideal

solution whenever energy saving is an essential parameter.

The EC motor is synchronized with permanent magnets which are

electronically commutated. The commutation is made by a power

transistor, therefore there are no mechanical elements such as a collector

or brushes which would noticeably reduce the life span. In EC motors the

magnetic field is generated by the same rotor thanks to the presence of

permanent magnets. The commutation of the magnetic field is electronic

and consequently free of wear and tear resulting from contact between

static and rotating parts. The operating mode and the materials used lead

to an increased efficiency which is shown in less absorption with the same

performance. The use of a directly coupled motor substantially increases

the yield from the heat dispersed into the air and the absorbed power than

that which can be obtained with fan systems featuring a drive belt, it also

dramatically reduces the need for maintenance intervention and guarantees

total reliability.

On request the unit can be equipped with second generation EC fans

optimized in the aeraulic design of the impeller and realized with composite

materials.

13

Main components

Cooling Coil The cooling coil has been designed with a large front surface using the total

space available in order to have an elevated SHR and a low air crossing

speed in order to eliminate droplets of condensation, reduce pressure

drops in the air and ensure a more efficient heat exchange during both the

cooling and dehumidification processes. The coil is made from copper tubes

mechanically expanded on aluminium fins, complete with a hydrophilic

treatment to reduce the surface tension between the water and the metal

surface, facilitating film condensation and avoiding the risk of condensation

droplets forming outside the condensate drain tray. In chilled water units

the coil is situated upstream from the fans in order to ensure optimum air

distribution and has a stainless steel condensate drain tray with a flexible

drainage tube and an integrated siphon.

Box Type air filters Box type Air filters made from self-extinguishing, synthetic fibre cellular

material. The frame containing the filter material is made metal. The pleated

arrangement of the filters extends the surface area ensuring a high filtering

efficiency and low pressure drops. The filtering rate is EU4 (standard) or,

on request, EU5 (according to EUROVENT 4/5); in which case the filters

are mounted inside the equipment, upstream from the coil. It is extremely

easy to access and remove the filters in all unit configurations. Filtering

rates of up to EU8 are available on request (according to EUROVENT 4/5);

in this case, the filters are mounted on the plenum outside the unit.

Plenum with Bag type Air filters As an option to maximize the efficiency of the unit a plenum is available

with bag filters integrated that minimize the pressure drops ensuring lower

fan power consumption.

The filtering rate is EU4 (standard) or, on request, EU5 (according to

EUROVENT 4/5); in this case the filters are mounted outside the equipment,

upstream from the coil. It is extremely easy to access and remove the filters

in all unit configurations.

Low airflow and clogged filter alarm sensors Low airflow and clogged filter alarm sensors (standard on all models)

consisting of two pressure switches to control the operating conditions of

the fans and the build-up of dirt on the air filters inside the unit.

Hydraulic circuit The piping for the hydraulic circuit is coated entirely with closed-cell

insulating material to class 1 according to DM 26.06.84, class 1 according to

BS476 part 7, ASTM E 162-87, reduced fume opacity measured according

to ASTM 662- t9.

The unit can be fitted with a two-way or three-way valve with a remote

controlled servomotor. The maximum pressure is 6 bar (PN6). Units with

higher maximum pressures can be supplied on request.

The maximum differential pressure in closure is 2 bar for 2 way valve and

2,5 bar for 3 way valve. Higher closing pressure actuators are available on

request.

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Humidifier Immersed-electrode humidifier for modulating sterile steam production

with automatic regulation of the concentration of salts in the boiler to

allow for the use of untreated water. It is therefore possible to use water

with varying degrees of hardness and without the need for any chemical

treatment or demineralising. The humidifier has a steam cylinder, a steam

distributor (installed immediately downstream from the exchanger), water

intake and delivery valves and a maximum level.

The cylinder’s electrodes and the management of salt concentration inside

the cylinder guarantee perfect efficiency of the system, energy saving

and greater durability of the components. The steam cylinder is installed

outside the air flow to avoid any heat losses. The unit’s microprocessor

control indicates when the steam cylinder has to be changed because it is

empty; the steam cylinder can be, on request, the type which is able to be

inspected so that the electrodes can be routinely cleaned to remove any

lime scale. The maximum steam capacity production is adjustable within a

range which can be selected manually.

The humidifier can be configured according to the water conductivity, see

enclosed tables.

15

Main components

Electrical panel Electrical panel is located in a compartment separated from the air

flow and made in compliance with the 2006/95/EC directive and related

standards. The main features are as follows:

• a three-phase power supply 400V / 3ph + N / 50Hz for all of the units

except single coil units where the neutral is only present when there is an

optional condensate drain pump;

• low voltage secondary circuit 24Vac with isolation transformer;

• plastic isolating screen for protection from live components;

• general isolator with mechanical interlock;

• thermomagnetic circuit-breakers for protection;

• terminal board for no-voltage signal and control contacts.

All of the units undergo a safety test cycle to check the continuity of the

protection circuit and the insulation resistance and a voltage test (dielectric

strength).

Ultracapacitor Ultracapacitor module is an optional electronic device integrated in the

units that guarantees temporarily supply to the control in case of lack of

power supply.

This function permits to minimize the restart time of the Uniflair Close

Control and Chiller units avoiding the re boot time of the microprocessor.

The module avoids microprocessor switch off in case of Voltage dips,

short interruption and voltage variations according to test performed in

compliance with CEI EN 61000-4-11:2006-02, EN 61000-4-11:2004-08,

IEC 61000- 4-11:2004-03 part 4-11.

The module, integrated in the units by means of dedicated management

software, is implemented by buffer Ultracap capacitors, whose recharge is

autonomously managed by the module.

The device does not require special safety and pollution provisions, as lead

acid batteries are not used.

In case of power failure, capacitors release the stored energy until it is

not exhausted, the minimum time guaranteed with the Ultacapacitor fully

charged is 2 minutes. When power is reset, the capacitors start re-charging.

4 minutes of continuous charge is required, to have enough energy to

guarantee the active control until the subsequent lack of power.

Uniflair microprocessor displays the module charge status and the operating

mode ( Normal or Emergency).

Electrical panel: double electrical supply (optional) With the aim of guaranteeing a redundancy even in terms of electrical

supply the HDCV units can be provided with the option of double power

supply with automatic commutation.

The unit, thanks to an electro-mechanical changeover can be connected to

two separate electric lines, generally with one connected to a principal line

and the other to a generator or emergency line.

In case the principal line is not defined, the unit autonomously switches

over to the other, at the same time verifying an eventual return of supply.

When the principal line becomes available again the supply is restored to

this line.

The principal line can be chosen through a manual preselector.

As this solution allows both definition of the priority line and the frequency of

checking, the units equipped with double power supply guarantee absolute

continuity of service.

The double power supply is equipped with Ultra Capacitor device in order

to minimize the restart time during the changeover between line A and B.

16

Microprocessor control - UG50 The UG50 control system consists of two sections:

■ a Control Board which consists of one I/O board containing the regulation

software and which is fitted in the unit.

■ a User Terminal which consists of a user interface and which can be

installed locally or remotely.

The control system uses specifically designed sophisticated algorithms in

order to control the outlet water temperature within a minimal range and

to monitor and protect the various unit components. The user interface

provides clear information on the unit status and any current alarms.

The user terminal is equipped with a 64x120 pixel backlit LCD display and

6 backlit keys to move between and change parameters. The user terminal

can be placed onboard the unit or, on request, with remote control. By

means of the user terminal it is possible to set the operating parameters,

monitor the trend of the main working parameters and read any alarm

messages.

The Local Area Network connection is possible without any additional

hardware and enables up to 10 units to be controlled in the same room.

The LAN number of the unit is visualized in the microprocessor board.

The clock card option is already integrated in the hardware permitting a

proper timing of all the events.

Compatibility with Modbus protocol is an integrated feature on all of the

units thanks to a RS485 serial card already integrated in the microprocessor

board. A second slot for an additional BMS card is available, card to be

chosen as an optional according to the protocol required.

The control system enables the following functions:

■ temperature and humidity control based on a set point which can be set

by the user interface;

■ complete alarm detection system;

■ alarm event history storage;

■ alarm signal contacts which can be set on the user interface;

■ automatic restart when power returns after a cut out;

■ remote switching on / off of the unit;

■ password on 2 programming levels (settings and service);

■ possibility of communicating with 2 supervision system by means of an

additional serial card (optional);

■ clock/date management (integrated);

■ operating hour counter and the number of inrush currents of the main

components;

■ graphic display with icons displaying the state of the unit components

and showing all of the values read by the probes connected to the control

board;

■ management of the local network with the possibility of setting the

rotation of one or two units in stand-by;

■ operation of these units in set back mode, and regulation based on the

average temperature;

■ “override” function with which the operation of the main components can

be manually controlled without excluding the possibility of remote control;

■ possibility of deactivating some of the digital inputs (e-g: Humidifier /

Heaters) - for emergency situations / auxiliary generators;

■ alarm sequence history with up to 100 alarm events (with date and time

if there is a clock card);

■ flexible management of the digital alarm outputs, that is, the possibility of

independently addressing all of the outputs available (in almost all cases,

2), and to determine if the contact state must usually be open or closed;

■ flexible management of the alarms which cause, when there is LAN

connection, the intervention of the stand-by units;

■ the possibility of selecting forced timed flushing of the humidifier if the

water quality is not high.

17

Main components

Energy Meter Energy Meter is an option integrated in the electrical panel that permits to

monitor energy consumption of the unit, voltages between phases, current

of each phase, cosphi, power on each phase, energy consumption in kWh

and kVAR/h.

It permits to visualize the calculation of CO2 emissions depending on the

energy consumption of the unit (gCO2/kWh). The calculation varies from

country to country depending on the mix of renewable and traditional, it’s

possible to choose from the list the country where the unit is installed. In

this way the value of the coefficient is automatically configured (source:

International Energy Agency). In the event that the country is not present

in the preset list, it is possible to change manually the value of the

coefficient.

Discharge Temperature Control and

Moisture Control The control algorithm provides a Proportional & Integral regulation on the

discharge temperature of the CRAC unit, this system operates managing

the regulation of the on board three way valve.

The regulation logic is based on a proportional band which is not the

tolerance band but a "tuning band".

The mix of the sets of Integral Time, Proportional Band, dead band ensures

that the air temperature is maintained within the tolerance.

Tuning the control loop is the adjustment of its control parameters (gain/

proportional band, integral gain/reset) to the optimum values for the desired

control response guaranteeing the proper regulation of the unit.

Tolerance on Discharge Temperature could be obtained considering verified

the following conditions: heat load in the room presents small deviation

from the nominal value, fresh air is treated before being sent in the room,

setup a proper tuning of all the control loop parameters, instruments and

measurement calibration tolerances, chilled water temperature feeding the

unit ( water inlet temperature) must be maintained inside a tight range of

tolerance.

During the dehumidification phase, a dedicated control function is activated.

In order to maximize the dehumidification capacity the valve is opened at

the maximum position setted. The value of maximum opening of the valve

is adjustable in order to set the maximum dehumidification capacity of the

unit.

Uniflair has developed a humidity regulation system based on moisture

humidity control in the room with the aim of minimizing the humidification

and dehumidification processes and maximizing energy efficiency.

Humidification and dehumidification are indeed the two phases that

penalize the energy efficiency of the units during the running mode.

18

Dehumidification with limitation of

the cooling capacity During the dehumidification phase, a dedicated control function is

activated.

In order to maximize the dehumidification capacity and guarantee the

discharge temperature control, the HDCV units can monitor the heat load

in the room and consequently manage the optimum valve opening in

order grant the dehumidification in the ambient maintaining the discharge

temperature inside the required tolerance. This function also integrates the

possibility of cooling coil section partialization at a constant airflow.

Fan speed Management The HDCV units can manage different logics of fan speed management in

order to minimize energy consumption.

In combination with AFPS the unit will automatically set the airflow according

the pressure set point required under the raised floor.

Alternatively the unit can adjust the airflow in combination with the heat

load present in the room with a combined regulation of the airflow from a

minimum value to a maximum value according to the valve opening.

Alternatively the unit can regulate the airflow in combination with the valve

in a serial logic i.e. the valve regulates according the room heat load and

when the unit is not able to catch the heat load the unit will increase the

airflow from a minimum value to the maximum.

Dual Coil Regulation Logic The HDCV units can manage different logics of Dual Coil, in particular

circuit one and circuit 2 can work in alternation , in sequence or in parallel

according to the plant regulation logics and TIER level request.

Optimized Management The HDCV units can be integrated with Uniflair Chillers with Optimized

Management logics.

Optimized Management allows active variation of the set point and

interactive and automatic management of the thermal load present in the

room to optimize operation in free-cooling mode in all operating conditions

without affecting reliability or temperature control precision thanks to its

sophisticated regulation logic.

Optimize Management monitors the operating parameters of all the

system elements, including the operating temperatures of the racks and

the underfl or pressure allowing complete supervision of the Data Center

cooling system.

19

Main components

AFPS Most technological environments use an under floor distribution technique

to maintain the conditions within the built environment.

The principle is simple and long established and uses the pressure

underneath a raised access floor in order to ensure that cool air is available

wherever an air outlet (usually a grill) is positioned. Maintaining good

pressurisation is important for the air conditioning system to work efficiently.

This aspect must be guaranteed for the entire life span of the room and be

able to be modified over time.

The AFPS system (Automatic Floor Pressurization System) developed

and tested by Uniflair ensures automatic adjustment to the air flow according

to the servers installed and enabling flexible installation regarding the

infrastructure.

The AFPS ensures automatic adjustment of the air flow issued by the

perimeter units with EC fans during ordinary and extra maintenance to

maintain a constant under floor pressure by maintaining precise control of

the air distribution / cooling in all of the room (eliminating Hot Spots).

In fact, during ordinary maintenance, access raised floor panels are often

replaced which therefore reduces the static pressure underneath the floor.

As a consequence, the air flow issued by the grills is reduced and the risk

of hot spots is increased. The control module allows a nominal pressure to

be maintained underneath the access raised floor (from 20 to 80 Pa) and to

manage the fan speed ensuring that the nominal pressure value (which can

be set) is maintained during all of the operation phases of the unit during

the life span of the room itself.

The system is made of the following main elements:

■ Precision air conditioning units featuring modulating fan control (by

means of an inverter or continuous current fans);

■ Microprocessor regulation system with dedicated regulation software;

■ Pressure transducer which can be installed underneath the access

raised floor and which is able to monitor the static pressure;

■ Pressure sensor with anti-fouling and “filtering” system of the moving

components;

■ An assembly system for the pressure transducer ensuring reliable

readings which are not influenced by dynamic effects;

■ A communication and management system of the LAN parameters

integrated in the microprocessor control of the perimeter units.

■ The system manages the variations in pressure underneath the floor

by means of an integrated system of automatic pressure regulation in

order to deal with any eventual changes which are too rapid, therefore

stabilizing the system.

The system also manages the constant pressure underneath the floor

during ordinary and extra-ordinary maintenance of the floor and also when

new servers are installed, adapting the flow when new equipment is added

or when the floor panels are opened during maintenance / installation of

new equipment (without creating hot spots in another point of the same

room);

■ Partition walls underneath the floor break or are damaged.

The system is able to manage all of the information read by the different

units and define combined regulation strategies by means of a LAN

connection (Local Area Network);

The system may have a single point of reference in the room or may be

managed according to various areas. In the second case, it is possible

to control all of the units based on the average pressure read by all of

the units with the exception of the areas in which the pressure “differs”

too much from the average value. In this case, the units within this area

manage the air flow independently in such a way that this specific single

area also returns to a nominal value.

The system manages the growth of the room over time: automatically of

units, grills and air distribution systems added.

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Optional accessories Condensate drain pump (C and electrical heaters versions).

Humidifier and condensate drain pump (D version), suitable for eliminating

the hot water produced by the humidifier.

Optional accessories supplied with the on site assembling kit

The microprocessor control system can be supplied with the following

optional cards:

• Serial adaptor RS485 card for transmitting data to a centralized supervision

system with STD or MODBUS protocol;

• TCP/ IP interface board for connecting the units to the network managed

by a BMS operating with a SMNP or TCP/IP protocol;

• LON serial card for connecting the units to a network with a BMS operating

with LON protocol;

• Fire and /or smoke detector;

• Water leak detector comprising of a control module installed inside the

electrical panel and an external sensor. Connecting numerous additional

leak detector sensors or using a sensor strip probe can be carried out in

order to check several points.

The following accessories are available:

• Air intake plenum (height 500 mm) installed between the top of the unit

and a false ceiling or to the air delivery channel. The internal panels are

lined according the two standards available for unit panel lining;

• Main frame for assembly on a raised floor. The main frame is adjustable in

height (± 25 mm) from 200 mm to 600 mm and is provided complete with

anti-vibration supports.

Certification standards Uniflair LE - HDCV are in conformity with the following directives:

■ 2006/42/EC

■ 2006/42/EC

■ 2004/108/EC

■ 2006/95/EC

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