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The Large Hadron Collider Project IT-2937/ST/ATLAS

Annex 1 : Technical Requirements

AbstractThe purpose of this annex is to define the technical requirements for the construction and for the fitting of the various components of the installations.

March 2001

IT-2937/ST/ATLAS

Table of Contents

1 AHU: AIR HANDLING UNIT.......................................................................................................................1

1.1 IDENTIFICATION SYSTEM............................................................................................................................11.2 CONSTRUCTION OF THE AIR HANDLING UNITS (AHU).............................................................................1

1.2.1 Panels of the AHU’s...........................................................................................................................11.2.2 Structure, sections, and support.........................................................................................................11.2.3 Assembly of the panels.......................................................................................................................21.2.4 Air-tightness.......................................................................................................................................21.2.5 Sections of the AHU forming a box....................................................................................................21.2.6 Inside AHU lighting...........................................................................................................................31.2.7 Sight window......................................................................................................................................31.2.8 Fire resistance....................................................................................................................................31.2.9 Earthing..............................................................................................................................................31.2.10 Handling.............................................................................................................................................3

1.3 FANS (UU)..................................................................................................................................................41.3.1 General characteristics......................................................................................................................41.3.2 Fan type UUDC.................................................................................................................................4

1.4 MOTOR OF FAN (UM).................................................................................................................................51.4.1 General characteristics......................................................................................................................51.4.2 Types of motors..................................................................................................................................5

1.5 SERVO-MOTORS..........................................................................................................................................51.6 HEAT EXCHANGERS (UE)...........................................................................................................................6

1.6.1 Characteristics shared by all the types of heat exchanger.................................................................61.6.2 Characteristics shared by the water coils..........................................................................................61.6.3 Chilled water coil UEGZ....................................................................................................................61.6.4 Electric heaters UEEZ.......................................................................................................................61.6.5 Humidification system........................................................................................................................7

1.7 AIR FILTERS (UF).......................................................................................................................................81.7.1 General...............................................................................................................................................81.7.2 Metal pre-filters UFPZ.......................................................................................................................81.7.3 Multi-V pleated filters UFFM (multidiedral).....................................................................................81.7.4 Absolute filters UFAM.......................................................................................................................81.7.5 Filter classification............................................................................................................................9

2 VENTILATION DUCTS...............................................................................................................................10

2.1 CONSTRUCTION.........................................................................................................................................102.2 DUCT SUPPORTS........................................................................................................................................102.3 ACCESS TRAPS..........................................................................................................................................102.4 MANUAL ADJUSTING DAMPERS UVMM...................................................................................................102.5 MEASURING STATIONS..............................................................................................................................102.6 THERMAL INSULATION..............................................................................................................................112.7 BALANCE..................................................................................................................................................112.8 SHEET THICKNESS.....................................................................................................................................112.9 TEXTILE DUCTS: UGTX............................................................................................................................112.10 CONSTRUCTION CRITERIA AND OPERATING CONDITIONS.........................................................................12

3 ACCESSORIES..............................................................................................................................................13

3.1 RETURN AIR GRILLE: UQGA....................................................................................................................133.2 JALOUSIE GRILLE......................................................................................................................................133.3 AIR DISPLACEMENT TERMINAL: UQUD...................................................................................................133.4 MOTORISED DAMPER UVUM (FRESH AIR) AND UQCM (RETURN AIR)...................................................133.5 THREE WAY VALVE: UVMB (WITH FLANGE AND COUNTER FLANGE).....................................................13

Annex 1: Technical Requirements

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4 MARKING......................................................................................................................................................14

4.1 EQUIPMENT IDENTIFICATION....................................................................................................................144.2 DUCT IDENTIFICATION..............................................................................................................................14

4.2.1 Location of the identification...........................................................................................................144.2.2 CERN colour code............................................................................................................................144.2.3 Air flow direction.............................................................................................................................144.2.4 Circuit designation...........................................................................................................................154.2.5 Example of identification symbol.....................................................................................................154.2.6 Application of the symbols...............................................................................................................15

4.3 IDENTIFICATION OF THE ELECTRIC COMPONENTS.....................................................................................15

5 ACOUSTIC.....................................................................................................................................................16

5.1 ACOUSTIC BAFFLES...................................................................................................................................165.2 ACOUSTIC INSULATION.............................................................................................................................165.3 AIR HANDLING UNITS...............................................................................................................................16

6 METAL STRUCTURES...............................................................................................................................17

7 ELECTRICAL WORK.................................................................................................................................18

7.1 BASIS FOR CALCULATIONS........................................................................................................................187.1.1 Circuit-breaking capacity................................................................................................................187.1.2 Mechanical strength.........................................................................................................................187.1.3 Equipment selection.........................................................................................................................187.1.4 Environment.....................................................................................................................................18

7.2 ELECTRIC CUBICLES..................................................................................................................................187.2.1 Overall design of the electric cubicles (Contractor’s supply).........................................................187.2.2 UIAC: power cubicle (Contractor supply).......................................................................................197.2.3 UIAO: Control cubicle (Contractor supply)....................................................................................207.2.4 UIMG: Thyristor cubicle (Contractor supply).................................................................................217.2.5 UIMV: variable speed drive for motors (Contractor supply)..........................................................22

7.3 ELECTRIC BOXES.......................................................................................................................................227.3.1 UICP : Proximity command cubicle................................................................................................237.3.2 UICN : Fire Brigade control cubicle...............................................................................................23

7.4 ELECTRIC COMPONENTS...........................................................................................................................247.5 CABLES.....................................................................................................................................................247.6 CABLE TRAYS...........................................................................................................................................257.7 ELECTRIC CONNECTIONS...........................................................................................................................257.8 ELECTRICAL DRAWINGS............................................................................................................................26

7.8.1 Specification.....................................................................................................................................267.8.2 Electrical components......................................................................................................................26

8 INSTRUMENTATION..................................................................................................................................28

8.1 DESCRIPTION OF THE SENSORS:................................................................................................................288.2 DESCRIPTION OF THE ACTUATORS............................................................................................................30

9 REGULATION AND MONITORING........................................................................................................31

9.1 PROGRAMMABLE LOGIC CONTROLLERS (PLC)........................................................................................31


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Vocabulary

Term DefinitionAHU Air Handling Unit

CAMM Computer assisted Maintenance Management.CDD CERN Drawing Directory CIT « Power Supply Cubicle Intelligent Control »

DQE Description and Quantities EstimateEDMS Engineering Data Management System.EJP Reduce power operation mode.

FMECA Failure Mode Effects and Criticallity AnalysisHPGL Hewlett Packard Graphics LanguagesISO International Standardisation Organisation PDF Portable Document FilePLC Programmable Logic ControllerQAP Quality Assurance Plan

TCP/IP Transmission Control Protocol / Internet ProtocolTCR Technical Control RoomTDS Technical Data Server TF Tender Form documentTQ Technical Questionnaire

UIAC Electric power cubicle « Normal Power»UIAO Electric control cubicle « Normal Power»UICN Firemen control cubicleVSD Variable speed drive


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Warning

All the equipment and components installed by the Contractor shall comply to the present annex. The specific technical parameters are given in the Technical Specification, in the Description Quantities Estimate and in the Technical Questionnaire.

With respect the existing standardisation in the spare parts stock at CERN, certain components shall be chosen according to specific makes and type. In this case, makes and types are not followed in the present annex by the above mention : “or equivalent”.


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1 AHU: AIR HANDLING UNIT

1.1 Identification system

CERN has developed an alphanumeric identification system for organising the installation and the maintenance of the various components of the LHC Project. This identification system is described in Annex 7 and used in the various documents of this Invitation to Tenders.The Bidder should become familiar with this system. Each component is described in this document by the four alphanumeric characters forming the first group of its identification code.

1.2 Construction of the Air Handling Units (AHU)

1.2.1 Panels of the AHU’sThe panels shall be double-skinned, insulated made with at least 1 mm gauge galvanised, hot-dip or electro coated, steel sheet. The insulation shall be halogen-free, made of rockwool (minimum 70 kg/m 3). The panels shall guarantee the required acoustic properties. The panels may be fitted inside the structure or secured to the outside and laid flush, with the smallest possible gap between them. The thermal bridges shall be treated according to the class mentioned below.

Table 1: Class of AHU’s panels according to EN 1886 rule

Heat transfer coefficient Class T2* 0,5 < U 1 W / m2 / K

Assembly Class TB2* 0,6 < Kd 0,75

* if no other specific requirement in the technical specificationFor AHUs having two independent air streams (with a lower and a upper cross-section) the separating panel shall be designed in the same way as the other panels. A diagram of the AHU components is given in the Technical Specification.

1.2.2 Structure, sections, and supportEach component (coil, filter, measuring station crate, etc) shall be fitted in a modular structure forming a section with its panels. Several sections shall be put together to form a sub-assembly of suitable size for transport, handling and access to the premises. The complete AHU, placed on a support chassis, shall comprise the sub-assemblies joined together. The structure shall consist of a rigid hot-dip galvanised steel frame. The brazed or welded parts shall be cleaned and brushed and then coated with a galvanising paint or equivalent. This structure shall be designed to support the load of the components corresponding to the various sections without transmitting mechanical forces to the panels. Reinforcements shall be fitted to the inner and upper surfaces to increase the rigidity of the structure and resist handling forces without deformation or other damage. There shall be uprights in front of each section so that removable panels may be fitted and the components mounted and removed. Once the access panel removed, it shall be possible to remove the component completely from the AHU by means of slide-rails. If the panels do not adjoin, the section forming the structure shall be filled with an insulating material meeting the specifications and ensure the same heat transmission coefficient as the panels.The support chassis corresponding to the access sections shall be suitably reinforced. The sections shall be fitted with internal separators around the components to prevent short-circuits in the air-flow. The sub-assemblies shall be delivered fully fitted and protected and finally assembled on site.The support chassis shall consist of 2 parallel rails of the same length as the AHU and ensure the planeness of the assembly. The Contractor shall be responsible for levelling by means of adjustment devices.


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1.2.3 Assembly of the panelsAll the panels and other components shall be secured to the structure by cadmium-plated mild steel nuts, bolts and washers. The sub-assemblies shall have enough drilled feet to the structure for screwed assembly. The system shall allow alignment and rapid assembly with the minimum of standard tooling. The lower structure of each sub-assembly shall previously have been fitted with attachment points so that each one can be firmly secured to the support chassis. Once assembled, the unit shall resist the operating pressures and withstand the under and overpressures caused by the complete closure of the upstream and downstream dampers.

1.2.4 Air-tightness

Table 2: The permissible leakage rates (shall be tested to the manufacturer)

Static pressure limitP

Leakage limit (litre’s per second per square metre of the outside surface of an assembly)

0 < p < 500 Pa 0.027 x p 0,65

600 < p < 1000 Pa 0.009 x p 0,65

1100 < p < 2000 Pa 0.003 x p 0,65

2000 < p 0.001 x p 0,65

p is the differential pressure in Pa

The sealing between panels and structure shall be provided by shaped seals of halogen-free material. The cable and pipe passages inside the AHU and through the outer panels shall be sealed by means of packing glands or, for control cables, by smooth passages injected with a silicone compound.

1.2.5 Sections of the AHU forming a box

1.2.5.1 Sealing box UQCS

The boxes are intended to provide the connection between two sections on either side of a wall. 50 mm of rockwool insulation shall be secured around this section.

1.2.5.2 Mixing box

These are of three types: casing with removable panel and damper (UQCN), casing with door and damper (UQCM), casing with door and damper (UQCU), 400°C/2h fire resistance rating.

1.2.5.3 Access box

Access casings shall comprise doors with double internal and external halogen free handles. They shall be sealed by shaped halogen-free rubber sections. The positions are shown in the schematics. Besides the reinforced basic structure, the casings shall comprise a walkway grating capable of bearing a concentrated load of 100 kg and an additional landing for double air-passage AHU’s. The access panels for water coils shall be easily removable and have cut-outs for the connecting pipework. These cut-outs shall be fitted with insulating seals and a hot-dip galvanised steel packing glands secured to the outside of the panels. On one side the AHU’s shall consist of casings with access via removable panels (UQCA) and casings with access doors (UQCL and UQCM) and on the other of screwed panels. The cross-sectional width of the UQCL and of the UQCM shall not be less than 600 mm. In the 400°C/2h fire rating version, the UQCW access casings shall be fitted with a door and cut-out having the same fire rating.

1.2.5.4 Rack box for measuring instruments UQCE

These shall comprise a rigid U-section frame of suitable width for the size of the measuring sensor and allowing for its securing over the whole of the air path cross-section, for which uprights shall be fitted. This frame shall be capable of travelling on upper and lower slides once the side panel has been


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removed and be easily removable from the structure. The cross-sectional width of the UQCE shall be no less than 200 mm. If there are two air streams, two independent measuring racks shall be fitted.

1.2.5.5 Intermediate box UQCO

Consisting of fixed panels, they shall provide the connection between various sections.

1.2.5.6 Fan access doors UQCV

The door faces shall be of the same type as those of the panels. For motor weights above 40 kg, the casing itself may have a slide rail with a hook for handling the motor (the approval of CERN's TIS Division must be obtained for all the handling devices provided by the Contractor). Two doors (one per air stream) will be required for double air-stream AHU’s.

1.2.6 Inside AHU lightingThe Contractor shall be fully responsible for the electric lighting installation inside the AHU.The equipment shall essentially comprise:

the 230 V internal lighting system of the AHU with a tightly sealed port in each section with facilities for inspection and overhaul,

control by a single switch with light indicator, the lighting cubicle shall comprise the separate terminal blocks (power supply, the protective

devices and the fuses, differential switches, … ); this cubicle shall be independent of the electric ventilation cubicle,

the cables shall run on cable trays or in galvanised tubes. The installation specifications for the electric wiring shall be the same as those for the ventilation system.

1.2.7 Sight windowEach lighted section of AHU shall be designed with a air proof double glass window, halogen free.

1.2.8 Fire resistanceAll the materials used in the AHU’s shall be non-combustible. If an AHU is designed to operate at 400°C for 2 hours, all the components shall be suitably selected.

1.2.9 EarthingEach section of an AHU comprising electrical components at risk (heaters, motors, fans, etc.) shall be fitted with an earth terminal directly connected to a metal part of the structure. The connections between the earth terminals and the internal electrical components shall be made by using suitable insulated cables, the colours of which shall comply with the specifications of CERN's code. The Contractor shall be responsible for the proper fitting of these earthings.

1.2.10 HandlingEach AHU shall be provided with its own handling system (holes in the base with handling system included), to move the unit after installation. All faces shall be easily removable (panels with one quarter round handle on access and hydraulic connection side, and screwed panels on the other side), to permit the handling of all components of the AHU. In order to let the dismantling in case of need and for the purposes of handling and removal of each ventilation section for maintenance (turbine, motor, etc.), the Contractor will supply a complete range of lifting and handling equipment (telescopically retractable monorail, lift truck, lifting beam, hook, hook assembly, etc) customised to deal with the load to be handled (approval to be obtained from CERN TIS Division) . The access doors to the internal constituents of the ventilation units, must be wide enough to allow these items to pass through.


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1.3 Fans (UU)

The abbreviation (UU) covers the fan, its motor and, where appropriate, its casing.

1.3.1 General characteristicsThe fan and its fixings shall be entirely of non-corroding metal. The overall design shall be of the industrial type. The efficiency of the fan shall be > 80 %. The motor-fan set shall be fitted on a shared frame with anti-vibration blocks. The intake (single port) and the outlet (single and double port) of the fan shall be fitted with flexible halogen-free sleeves.Important: most of fans at CERN are working continuous all day long and all year long, without any interruption except the annual shut down.For this project, the maximum speed of the new fans shall be 1400 rpm/mn.

1.3.1.1 Volute

The volute shall either be made of galvanised sheet steel or be a mechanically welded structure of continuously welded painted sheet steel, with reinforcing frames. It shall be fitted with a door for inspection and bleeding of the casing. The intake apertures shall be fitted with protective grilles.

1.3.1.2 Impeller

The impeller shall be of the rearward-inclined flat-blade type to ensure a stable flow rate, maximum effectiveness and minimum noise. Its peripheral speed shall be < 40 m/s.

1.3.1.3 Spindle

The end of the spindle opposite the transmission shall be extended by at least 25 mm so that a proximity detector may be fitted to monitor the fan's rotation. The fans shall be fitted with lubricated-for-life single-row ball bearings with securing ring. The large fans shall be fitted with cast steel spherical roller bearings.

1.3.1.4 Selection

Each fan shall be selected to ensure the mass air flow rate (plus 5%) specified for each AHU in order to guarantee a specified flow rate at the forced-air points, in line with operational values. The overall flow rate loss to be taken into account shall be the sum of the flow rates of the AHU with moderately-clogged filters (the mean of the flow rate loss of the filters when clean and when due for changing) and the air circuits upstream and downstream of the unit.

1.3.1.5 Transmission

The pulleys shall be V-grooved with removable conical hubs (taper-lock type). The distance between pulley centres shall make it possible for the belts adequately to surround them. The screw belt tensioners shall ensure proper belt alignment. The shapes of the belts shall be suitable for the pulley system and the whole transmission system shall be capable of withstanding frequent switching on and off. The types of belt shapes shall be selected from the upper section of the calculated range and they shall be N+1 in number (calculated number + 1), i.e. at least 2 belts. The front of the protective transmission casing shall be of perforated sheet steel so that the belts are clearly visible and it shall be removable for checking. The motor shall always be fitted on slide rails to maintain belt tension and adjustment shall be possible via a single screw on each rail, with a lock nut keeping the base in position.

1.3.1.6 Accessories

Each fan section will be fitted with pressure measuring points (fan intake and outlet pressure) to measure the total fan pressure.

1.3.2 Fan type UUDCCentrifugal fan, double port, belt transmission.


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The fans shall have twin intake ports, with shaped blades curved backwards towards the rear (reaction). The impeller shall be keyed to the transmission spindle and removable by releasing screwed flanges. The outlet aperture shall be connected to the AHU by a non flammable material flexible sleeve.

1.3.3 Fan type UUZC (option)Centrifugal fan, single port, belt transmission, designed for gas extraction.All the components shall be designed for the operating conditions (aluminium impeller, anti static belts, thermal and acoustic insulation of the AHU casing).The spindle passages shall be fitted with leak recovery systems on the packing glands.

1.4 Motor of fan (UM)

1.4.1 General characteristicsBefore despatch, the motors shall be protected against water vapour infiltration and remain so protected until they are operational. The motors shall be built to the European standards (IEC). A 10% margin shall be provided over the maximum mechanical power absorbed at the fan spindle. Rotor cage type, three phases, operating voltage: 3 x 400 V, 50 Hz, protective index: IP54 (except for special applications), insulation class: F (except for special applications), service type: S1, starting type: < 25 kW, direct,

> 25 kW, electronic motor-starter, suitable for the operation of the fan with limited starting current (ID/IN < 5),

fitted with ball bearings.

The electrical connection box shall be accessible and fitted with packing glands matching the diameters of the power supply cables. Earth terminal on the motor casing.If the fan drive motors are within the heat radiation zone of the electric heaters, they shall be protected by reflective metal sheets. "Equipment" Emergency stops shall be fitted in compliance with safety instruction N°5. All the motor shall bear an engraved identification plate. All electric motors shall feature a thermal overheating protection (by means of thermistance) embedded in windings, as well as by means of magnetic–thermal protection, cutting off the supply, stopping the fan and delivering a “default” signal. The subsequent start-up of the motor shall require a manual command.

1.4.2 Types of motorsThe fan motors UMF1 and UME1 shall be of the single-speed type, of the two-speed type for UMF2, and of a variable-speed drive type for UMFV. The UMF2 motors shall be fitted as PAM type. The motors UMI1 shall be designed to resist operating conditions at 400°C/2 hours. In any cases, the rotation speed shall not exceed 1500 rpm.

1.5 Servo-motors

These shall be fitted to the dampers. They shall meet the IEC standards with suitable degrees of protection and insulation classes for the environment and operating conditions. The supply voltage shall be 24 V A.C. The drive system shall be suitable for the equipment to be operated and the assembly shall allow no slip in the movement transmission. The motor shall include a red mobile index integral with the motor spindle and a graduated sector with markings and labels on an engraved plate for the "OPEN" and "CLOSED" positions so that the position of the blades can be visually detected at a distance.

A distinction is made between two kinds of servo-motors:


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on-off control servo-motor with return spring UMRE: when powered, the motor shall keep the damper in position (open or closed). If the power supply fails, a return spring shall set the damper to its position of rest. It shall be fitted with OPEN/CLOSED end-travel sensors UBLO.

progressive control servo-motor with return spring UMRM: The motor shall make it possible to set the damper to any position between "open" and "closed" depending on the 0-10 V control signal. A repeater potentiometer UBLP shall send a position signal to the controller.

1.6 Heat exchangers (UE)

1.6.1 Characteristics shared by all the types of heat exchangerLike all the components of the AHU’s, the heat exchangers shall be easy to install in and remove from the inside of each section. This can be ensured by the fitting of slide rails. The structure of the exchangers shall be rigid enough to prevent any deformation. The exchange components shall be fitted in a hot-dip galvanised steel frame. Once in position, the exchanger shall remain accessible for cleaning. The heat resistance characteristics of the materials shall be suitable for the operating conditions. The exchanger type shall be selected in accordance with the performance levels for the operating conditions.

1.6.2 Characteristics shared by the water coilsThe maximum speed of the water in the coils shall be 1.1 m/s. The exchangers shall be designed so that a water temperature variation or air flow rate fluctuation of +5% in relation to the rated values does not affect the performance. The exchangers shall be made of seamless drawn copper pipe with an outside thickness 1 mm. Their assembly and connection shall make it possible to clean the insides of the pipes thoroughly, especially drainage, without the use of compressed air. The detail drawing of the piping prepared by the Manufacturer shall be part of the technical documentation to be delivered to CERN. The fins shall be of 0.3 mm aluminium, with a minimum density of 330 per metre. The connections to the "outward" water circuit shall be at the bottom for the inlet and at the top for the outlet from the battery to facilitate bleeding. The exchangers shall be of the counterflow type. Each hydraulic union shall be fitted with a threaded flange and counter-flange for connection to the outside pipework. Each exchanger shall be fitted with a stub with a plugged threaded plug for bleeding and drainage. The frame of the coil shall be fitted in stainless steel. If, in the same type of AHU, several exchangers are supplied with the same type of water, a single type of exchanger shall be adopted, with the number of pipes and dimensions corresponding to the most powerful (ease of exchange, reduced stock of spare parts). The bends and manifolds shall be fitted inside the casing. The Contractor shall supply and install the coils with plugs on the spare bleeds and drains, screwed flanges and welded counter-flanges on the coil connections.

1.6.3 Chilled water coil UEGZThe air flow rate throughout the free cross-section shall be stable and uniform, and shall not exceed 2 m/s. The frame of the unit shall be fitted in stainless steel. The units shall be fitted with a washable drain pan tank of equal size (length and width) to the lower volume of the exchanger plus 90 mm on all four sides. If this is impossible, the width shall be at least equal to the width of the section. This tank shall be fitted with discharge piping with an air trap, the height of which shall ensure the full removal of the condensed water, taking account of the depression. The tank shall be made of stainless steel. The type of construction is given on the detail drawing, ref. LHCU99900011, for indication only. Halogen free drop separators may be fitted, but the section of each AHU shall be designed to operate without any drop separator.

1.6.4 Electric heaters UEEZThe electric heaters shall occupy the whole of the available air passage front section. No air flow restriction diaphragm shall be fitted. The air flow rate through the whole of the available cross-section shall be stable and uniform; the speed shall not exceed 3 m/s. It shall consist of smooth elements consisting of a resistant wire fitted in a stainless steel tube with insulation between the two. Each element shall be easy to withdraw and properly supported to prevent any sag over its length. When the element is withdrawn, the support shall not damage the equipment or hamper handling. The surface temperature of the elements shall not exceed 90°C. The flow rate distribution shall ensure perfect distribution of the heat emitted by all the elements. The operating voltage shall be 400 (+10, -15%) V +


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earth, 50 Hz three-phase. The electric load shall be balanced between the 3 phases. The system shall be star-connected. The internal wiring shall comprise a set of copper busbars suitable for the capacity of the unit. Each bar shall be designed to accept lugs suitable for the cross-section of the input cable. The Contractor shall be responsible for laying the external wiring (power and control). Any open passages which could give rise to stratification shall be fitted with deflectors. The electric unit shall be triggered by the operation of the controller on the power contactor or rack. There shall be one single power supply via thyristors fitted in a specific cubicle and controlled by the controllers (power variation from 0 to 100%). Make VOLTA or the like.An overheating thermostat of suitable length for the unit and fitted at the top shall be installed on each unit.

The temperature downstream of the electric unit shall be measured by a UBTB-type sensor. If the temperature exceeds 50°C, the controller shall be programmed to stop the thyristor power

variation with the generation of a fault without acknowledgement. The power circuit-breaker shall be cut from the power rack if the overheating thermostat detects

temperature above 70°C.

When the heating system is shut down, the cooling of the unit shall be ensured by a delay in the stopping of the fan. The electrical connection shall be made on a terminal block in a sealed cubicle with protection against accidental contact. It shall have an electrical equipment identification label. For safety reasons, the electrical connections of the unit shall be protected and inaccessible from the AHU's removable panel.

1.6.5 Humidification systemThe humidifier shall be designed for electric steam, type DEFENSOR MK5 from AXAIR KOBRA or equivalent, according to the following features: operate without pressure, produce demineralised odourless and bio-sterilised steam, Cr Ni washable tank and scale recovering tank (design for easy maintenance), automatic and

temporised rinsing, Keyboard and LCD screen to configure and request operating data, Heating by electric heaters for variable power from 0 to 100%, Incorporated regulator and link to the PLC, Steam supply system according to the same supplier, adaptation to the quality of water.The mounting method and the fittings shall be according to the manufacturer recommendations.


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1.7 Air filters (UF)

1.7.1 General The filter medium shall be of non-combustible, halogen-free material, complying to IS41. The filters shall consist of removable filter cells fitted on slide rails with sealing strips upstream and steel foil strips downstream to prevent unfiltered air from by-passing the system. Supports and frame shall be in galvanised steel.

Every structural precaution shall be taken to prevent the passage of unfiltered air, paying attention to the seal between: the joint between the supporting frame and the metal structure, between the filter medium and the supporting frame.

The filter medium securing frames for the filters and pre-filters shall be re-usable. They shall be fitted with a fixed securing grille with a movable fitting on a spring-steel hinge to ensure that the filter medium is held, tensioned and compressed. Each filter shall be fitted with a differential pressostat. The filter section shall be fitted with an overhaul port. The filter section shall be fitted with an inclined-tube or dial pressure gauge (value with filter clogged). The Contractor shall take account of the parameters below in order to make full use of the dust retention capacity and the useful life of the filters at the nominal flow rates in use without altering the efficiencies of the media: Flow rate: the air full velocity through the filter shall not exceed 2.8 m/s. The entire available

cross-section shall be used for the filtering equipment. Clogging reserve: The head available on the fan for filtering shall be at least 200 Pa in addition to

the initial pressure loss of the clean filter, at the rated maximum actual flow rate. Selection of filter medium: the Contractor shall provide the filter characteristic diagram; the

working points of the clean filter and the one ready for replacement shall be shown.

1.7.2 Metal pre-filters UFPZFiltration class EN 779-95, G3.U-section frame, 50 mm gauge, each filter shall be fitted with two nickel-plated handles.Filter element: metal mesh on metal grid on each surface. Impregnated filter element. Material: stainless steel. Dimensions 610 mm x 610 mm including securing frames.Regeneration : by immersion in a tepid detergent-water solution and drainage before re-impregnation.Make CAMFIL type CAM-METAL-stainless steel or equivalent.

1.7.3 Multi-V pleated filters UFFM (multidiedral)Filtration class EN 779-95, F8.Electrically galvanised steel frame and media maintain with halogen-free ancillary components.Filter medium: folded non-flammable glass fibre with constant inter-fold distance. Depth : 400 mm.Minimum filtering area of 24 m2 per cell 600 mm x 600 mm or 12 m2 per cell 300 mm x 600 mm.Make CAMFIL type OPAKFIL-LD or equivalent.

1.7.4 Absolute filters UFAMFiltration class EN 779-95, H10.Electrically galvanised steel frame and media maintain with halogen-free ancillary components.Filter medium: folded non-flammable glass fibre, aluminium separators.Cells 610 mm x 610 mm x 292 mm.Make CAMFIL type Micretain 5000 or equivalent.


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1.7.5 Filter classification

Type of filter ClassificationEN 779-95

%

Coarse filters

Mean degree of separation ÄG1 55 % < 65

G2 65 % < 80

G3 80 % < 90

G4 90 %

Fine filters

Mean efficiency E

F5 40 % < 60F6 60 % < 80

F7 80 % < 90

F8 90 % < 95

F9 95 %

Absolute filters

Initial permeability PA

H10 5 < PA 15

H11 0.5 < PA 5

H12 0.05 < PA 0.5

H13 0.005 < PA 0.05

H14 0.0005 < PA 0.005

H15 0.00005 < PA 0.0005

H16 PA 0.00005


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2 VENTILATION DUCTS

2.1 Construction

The ducts shall be perfectly smooth and sealed inside and stiffened to prevent any vibration and sway. They shall be made of hot-dip galvanised sheet steel and meet the EUROVENT specifications. Transitions from one cross-section to another shall be made at an angle of 45° or less, or otherwise fitted with directional vanes. The radius of the bends shall be equal to or greater than the width of the duct, or otherwise fitted with directional vanes.

2.2 Duct supports

The type of construction is given on detail drawing ref. LHCU99900010. The Contractor shall be responsible for the design, supply and installation of all the duct supports. All the securing components and the supports shall be hot-dip galvanised. The ducts shall be secured to concrete walls via a pad. The maximum support spacing shall be 2.50 m and supports shall be suitably positioned when bearing double-skinned ducts. Circular ducts shall be supported by flat steel collars with a removable section. Rectangular ducts shall be supported by U-brackets secured by galvanised threaded rods screwed into ceiling plugs. The supports of vertical ducts shall always be secured at floor level. They shall be of galvanised steel profiles. The ducts shall be secured to their supports by clamps. The ducts shall be spaced away from the walls, partitions and floors by spring systems.

2.3 Access traps

Access traps shall be fitted near the adjusting and fire dampers and the deflecting vanes. They shall be made of sheet steel of the same gauge as the duct and with double insulated walls on double-skinned ducts. They shall be secured to the duct by two bronze hinges and two or four bronze pressure-actuating handles.

2.4 Manual adjusting dampers UVMM

The manual adjusting dampers shall be of the rectangular type with centrally pivoted opposed blades fitted with ferrules for fitting in circular cross-section ducts. The blades and their bases shall be of galvanised steel. The regulating device shall be secured to the outer skin of the duct and fitted with a locking screw and a position indicator. The balancing dampers shall be fitted wherever flow rate or pressure balancing is required, especially at the branching of two circuits, and upstream of each air-displacement terminal. They shall be rigid to prevent any vibration and have an external sector for adjustment and locking in a position ensuring a flow rate in accordance with requirements. A graduated sector shall be fitted with a mobile red pointer and the engraved inscriptions "OPEN" and "CLOSED" so that the position of the dampers may be visually noted at a distance. It will be a manual stop sector on manual damper.

2.5 Measuring stations

See detail drawings ref. LHCU99900006 and LHCU99900007.These shall be designed for individual measurements to balance the flow rates in each circuit. There shall be apertures for the insertion of a Pitot tube. Each aperture shall be fitted with a screwed plug attached to the station by a chain. The stations shall be fitted on the straight sections of the ducts (laminar flow) after every branch.


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2.6 Thermal insulation

The ducts conveying pre-cooled air shall be double-skinned with a galvanised sheet inside, a galvanised sheet outside and internal mineral wool insulation, density 70 kg/m3, of 25 mm or 50 mm thick, as per requirements.

2.7 Balance

The Contractor shall balance all ductworks and regulate dampers and grilles.

2.8 Sheet thickness

The galvanised sheet thickness shall be according to the ISO 3575.

Tableau 3 – Rectangular air ducts

Dimension of the biggest side [mm]

100 to < 400 400 to < 1200 1200 to < 1600 1600 to < 2000 2000 to 4000

Minimum thickness [mm] 0.6 0.8 1.0 1.2 1.5

Tableau 4 – Circular or oblong air ducts

Nominal diameter [mm] < 100 100 to < 300 300 to< 600 600 to< 1000 1000 to< 1250 1250 to 2000

Minimum thickness [mm] 0.4 0.6 0.8 1.0 1.2 1.5

2.9 Textile ducts: UGTX

The textile ducts shall be made in non flammable polyester and they may be washable. The air diffusion will be by slits inside reinforced zones. CERN will choose the colour at the beginning of the works. The Contractor shall provide spare ducts for the washing operations. The ducts shall be mounted with all fittings according to the manufacturer recommendations.


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2.10 Construction criteria and operating conditions

The structural criteria and the testing and service conditions shall be as set out in the tables below.

Tableau 5 –Construction criteria for ducts

Identification UGPN UGEN

Circuit Supply circuits Exhaust circuits

Double skin

assembled with copper electrical continuity braid, min. cross-section 35 mm2

Dimensions as per drawings

Dimensions as per drawings

Insulation

Fireproof panel rockwool insulation, density: 70 kg/m3 with external aluminium foil for double skin circuit.

Insulation thickness (mm) 25 25

Test conditions

- under pressure (Pa)

- in depression (Pa)

max. leakage rate (l/s.m2)

Leakage shall be tested during the works according to Eurovent standards methods.

+ 1 500

0,8

- 1 500

0,8


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3 ACCESSORIES

3.1 Return air grille: UQGA

The return air grilles shall be of steel sheet, single-deflection, vertical-vane types with the air flow rate controlled by a slide adjustable from the front. The surfaces shall be phosphated and painted. They shall be of the TRS-RA type from TROX, or similar, with frame.

3.2 Jalousie grille

The jalousie grille shall have adjustable louvers.

3.3 Air displacement terminal: UQUD

The terminals shall be of the industrial type. They shall ensure a perfectly uniform flow rate pattern via nozzles with integral deflection blades, fitted inside an internal distribution plate. Standard galvanised sheet steel construction, displacement on three surfaces. The visible surfaces shall be coated with acrylic varnish in an RAL colour, same colour for all different device types. No rivets or screws shall be visible. The terminals shall be provided with the certificate of the supplier. Each displacement terminal shall be supplied via a manual control damper making it possible to balance the air supply circuit. A tubular section fitted at the front and peripheral stops at floor level shall ensure protection against shocks.The terminals shall be according to the dimensions as per drawings, chosen from ABB - FMK, FRANCE AIR - DVC or HESCO – PAR & KDC ’s ranges, or the like.

3.4 Motorised damper UVUM (fresh air) and UQCM (return air)

These shall be made of galvanised sheet steel: coupled multi-blade, opposed movement, sealed. The air-tightness of the dampers shall meet the DIN 1946 standard. The steel-section frame and all the accessories shall be galvanised. To prevent any deformation and ensure proper planeness and mechanical rigidity, the whole of the damper shall be fitted on a steel-section base frame straightened before assembly. The blades shall be of the double sheet-steel type with shaped rubber seals. The length shall be calculated to prevent any deformation owing to the speed and differential pressure. Brass bearings. The external-rod drive system shall ensure precise positioning of the blades and minimum friction. They shall be protected by a casing and located outside the air-path. The dapmpers shall cover the whole section inside the AHU. If several dampers are assembled in parallel for AHU (treated air flow > around 12000 m3/h per damper), one servo-motor shall be fitted per flap. Make TROX type JZL or equivalent.

3.5 Three way valve: UVMB (with flange and counter flange)

UVMB Three way valve with return back signal option

4x1 + 2x1 0 – 10 V 24VAC

BAELZ


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4 MARKING

4.1 Equipment identification

Each item of equipment, e.g. air-handling casing, pump, etc., shall be fitted with a rigid data plate secured to it and showing:

the CERN reference according to Annex 7 with a serial number, the characteristics of the equipment, the manufacturer's name.

A circuit diagram on a rigid panel with laminated protection shall be fitted in front of each control rack. The diagram shall be in colour and show the names of the main components and the characteristic values of the installation.

4.2 Duct identification

Each air circuit shall be identified as described below: identification of the air conveyed, direction of the air flow, destination of the air flow.

4.2.1 Location of the identificationThese identifications shall be fitted so as to easily visible as set out below: the symbols shall be on the access side of the installation, the symbols shall not be obscured by parts of the structure, other ducts, various installations or

other distribution service systems, the symbols shall be shown at well-lit points.

4.2.2 CERN colour codeThe colours to be used are given in the table below. They shall be strongly contrasting so that they can be seen even when covered with dust.

Type of circuit Colour

Smoke extraction General extraction Supply

redyellow

blue blue blue on white background

4.2.3 Air flow directionThe shape of the selected symbol shall indicate the direction. This shape shall take the form of an equilateral triangle with one point in the air flow direction. If the ends of the ducts are invisible, two triangles shall be shown in line to show the air flow direction. The size of the symbol will depend on the size of the duct and the limit of visibility. The minimum length of one side of the triangle shall be 150 mm.

4.2.4 Circuit designationThe circuit designation shall be shown in the triangle. The information shall comprise four alphanumeric characters:

- first character : shall correspond to the letter of the first group in the alphanumeric system given in Annex 7, e.g.:


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D = smoke extraction E = general extraction P = power supply

- second character: shall correspond to the fourth letter of the first group in the alphanumeric system of Annex 7 and define the type of duct.- third character: shall correspond to the first figure of the fourth group in the alphanumeric system of Annex 7 and define the air and the place served by the circuit, e.g.:

1 =machine tunnel2 = accessible area3 = experimental area (outside)4 = experimental area (inside)5 = accessible area (outside concrete module)6 = survival area (inside concrete module)

- fourth character: shall correspond to the second letter of the fourth group in the alphanumeric system of Annex 7 and define the direction in relation to the centre of the LHC ring, e.g.:

D = rightG = leftC = centre

The above characters shall be black with the symbol colour inside.

4.2.5 Example of identification symbol

DM2D

triangle colour : red

- D = smoke extraction- M = type of duct- 2 = accessible area- D = on the right viewed from the centre of LHC

4.2.6 Application of the symbolsSeveral methods may be used, provided that they are permanent and final:

Painted, metal plate.

4.3 Identification of the electric components

Identification according to annex 7, PGC and chapters 7 and 8 of the present annex.


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5 ACOUSTIC

The Contractor shall design all their acoustic attenuation components to ensure compliance with the limits given in the Technical Specification.

5.1 Acoustic baffles

The acoustic baffles shall consist of galvanised steel sheet section frames filled with an absorbent fireproof mineral wool material, protected against erosion, rot-proof and impregnated with a waterproofing substance. These shall be fitted with a resonance sheet over half of their area. The dimensions shall be suitable for the available apertures and the baffles shall be long enough to make use of the maximum available space and in any event not less than two metres.

5.2 Acoustic insulation

Internal sound insulation: fireproof absorbent mineral wool material, minimum thickness 25 mm; protected by perforated sheet steel. Double-skin construction.

5.3 Air handling units

AHU shall be sized to include sound attenuators inside if required by the imposed sound levels in the Technical Specification.


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6 METAL STRUCTURES

As a general rule, all the metal structure components shall be galvanised.No other specific requirement in the context of the Invitation to Tenders.


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7 ELECTRICAL WORK

7.1 Basis for calculations

7.1.1 Circuit-breaking capacityThe equipment used to protect and cut off the various circuits shall be compatible with the possible short-circuit current at the head of the main rack power supply. The Contractor shall obtain information on the short-circuit power of the power supplies provided by CERN in order to take all the necessary steps to comply with the NF C 15-100 regulations (circuit-breaker selection, etc.).

7.1.2 Mechanical strengthThis part of the calculations relates especially to the resistance of the materials to static, dynamic and electrodynamic forces. The racks shall be highly rigid. The installations like cable carriers, busbars, minor metalwork, supports, etc., shall be designed and adapted for their purposes in order to not distort and to withstand the ordinary overloads. They shall be installed with special care and the equipment used shall be of top quality.

7.1.3 Equipment selectionThe output lists are provided by way of indication in the Technical Specification. The Contractor shall discover the number, type and power of each output. This request shall be sent to CERN's technical official in charge of the contract at least six months before the power supplies are made available.In all cases the equipment used (circuit breakers, switches, differentials, etc.) shall withstand the short-circuit currents at their point of installation.

7.1.4 EnvironmentThe channels and cubicles shall be designed to take note of environmental conditions ranging from -15 °C to +40°C.

7.2 Electric cubicles

By and large, CERN will provide and feed the UIAC electric distribution power cubicles, except in case of small powers, where CERN will feed the Contractor’s cubicles.In any cases, UIAO cubicles shall always be provided and fed by the Contractor.In detail:

UIAC: 400V distribution power cubicle, in the blue colour, Normal power, supplied and fed by CERN according to paragraph 7.2.1, or in some cases supplied by Contractor and fed by CERN according to paragraphs 7.2.3 and 7.2.4.

UIAO: 400V control cubicle, in the blue colour, Normal power, supplied by Contractor and fed by Contractor from a UIAC cubicle, according to paragraph 7.2.5.

7.2.1 Overall design of the electric cubicles (Contractor’s supply)The Contractor shall provide two kinds of cubicles, first one type UIAC including electric power components, second type (UIAO) including control components.The cubicles shall be of vertical type, of electrically galvanised sheet steel 15/10 ths thick with epoxy + polyester paint coating with aerating apertures. All the sides shall be closed. They shall be fitted on bases or metal frames and designed for wall-fixing. Their upper edge shall be at a maximum of 2 m from the finished floor level.


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The racks shall be prefabricated, pre-wired on terminals and proud-fitted.

In addition, the cubicles shall: Have a RAL colour defined by CERN,

have doors fitted with ports windows for cubicles including PLCs,

have handles and locks type RONIS 2132 A, have input cable lead-ins via the lower section through packing glands fitted on removable plates,

have a protective index of IP 54 as per IEC recommendation 144,

have the metal parts earthed,

have 30% spare space,

have a relay circuit tuned to the PLC outputs with a max. voltage of 24 V,

have internal fluorescent tube lighting with a door-mounted rabbet contact,

have a casing for documents and diagrams, have one 2 x 10/16A + E 230V socket to the EU standard protected by a 30 mA differential circuit

breaker, have one 2 x 10/16A + E CERN Feller Swiss-type 230V socket protected by a 30 mA differential

circuit breaker,

have a relay tuned to the safety components with gold contacts.

The wiring shall be laid in accordance with the standards and PGC rules, complying with the provisions below : separate power and control circuits, separate power and control terminals, wire marking, marking of the equipment and racks by engraved plates (including equipment on doors), the terminal blocks with spring-loaded terminals shall be fitted in the lower part of the racks, the electrical equipment, secured to OMEGA rails, shall be of the modular type, all the pilot lamps shall be of the LED (light-emitting diode) type.

All cables shall be connected with terminals. The Contractor shall make the drawings of the equipment layout inside the racks and submit them to CERN for approval before manufacture. CERN's approval shall also be obtained for the location of these racks.For each output (motor, fan, electric coil, radiator,…), the Contractor shall also make provision for the operating time and electric power consumption integrator transmitting the power patterns to the Technical Remote Control downstream of PLC of the control cubicles.For the sake of uniformity in spare parts, CERN requires the use of equipment from TELEMECANIQUE's range or MERLIN GERIN’s range.The cables inside cubicles shall be marked at both ends by coloured rings according to international resistance identification code.

7.2.2 UIAC: power cubicle (Contractor supply)In some cases, the power cubicles shall be supplied by the Contractor and will be powered by CERN's Electrical Service.

Front panel : one 400 V on indicator lamp, one 230 V on indicator lamp, one 24 V A.C. on indicator lamp, one flashing orange general fault lamp,


19

one front rotating command of the general circuit breaking device, for each power outgoing feeder (motor, fan, electric heater, …):

the front panel command of the circuit-breaker, a three positions switch for ““Arret/Local/Distance” (Stop/Local/Remote) and PV/GV

(slow/fast) or potentiometer, all the ON and DEFAULT LED, the ON/OFF bottom command, one ammeter per fan or electric coil output with UBTI on S phase.

Internal layout: one 3P + N + E input protected against accidental contact, one four-pole cut-off device (circuit-breaker or switch) with outside padlockable handle, one set of distribution busbars protected against accidental contact, one three-phase voltage on relay with protection, one 230 V control circuit with protection; one 230 V voltage on relay,

one 24 V A.C. control circuit supplied via a 230V/24 V isolating transformer protected by fuses upstream and downstream,

one 24 V A.C. voltage on relay, for each motor of fan or electric heating coil :

- one set of isolating switches, magneto-thermal circuit-breakers, contactors and thermal relays per motor circuit* with protection against single-phase operation,

- one set of isolating switches, circuit-breakers and contactors per resistance circuit* with protection,

- a three positions switch for “Arret/Local/Distance” (Stop/Local/Remote), and two positions switch PV/GV (Slow Speed/Fast Speed) or potentiometer (VSD),

- a measure of the phase S current,- the information about 3 positions switch, PV/GV, and potentiometer current defaults and

current measure, shall be transmitted to the local monitoring system and the Technical Control Room supervision system,

the power supply in the control cubicle, one spare power supply with a 2 x 10 A bipolar circuit breaker, one spare power supply with a 1 x 20 A four-pole circuit breaker, the power terminals, the control terminal blocks with spring-loaded terminals, the terminal blocks for connection with the control system, all the UITI on each component supply.

* number to be defined by the Contractor

7.2.3 UIAO: Control cubicle (Contractor supply)The control cubicles shall be supplied and powered by the Contractor and physically separated from the power racks, and fed from a UIAC cubicle, on the normal power.

Front panel: In the RAL 5012 blue colour, one 220 V on indicator lamp, one 24 V D.C. on indicator lamp, one 24 V A.C. on indicator lamp, one flashing orange general fault lamp, one fault acknowledgement push-button, one port for viewing the front panel of the controller,

*


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one emergency stop equipment button (all installation stop), one front rotating command of the general circuit breaking device.

Internal layout: one 230 V P + N + E power supply from the power cubicle with lockable switch, one set of distribution busbars protected against accidental contact, one inverter, one controller power supply, one industrial programmable logic controller secured to the base of the rack, the remote of the socket of the PLC for portable console connection, a fold-away table for the portable console the 230 V outputs* protected by circuit breakers, the 230 V/24 V D.C. power supplies for sensors and actuators* with three spare power supplies,

protected by circuit breakers, one power supply for the possible addition of a printer, the 24 V A.C. power supplies protected by circuit breakers for sensors* with two spare, a fault acknowledgement push button for UBFY, 5 switch contacts connected and programmed to transmit internal controller information

(threshold, defaults or alarms, …) which will be defined by CERN at the beginning of the works. 25 % minimum spare points per I/O card

* number to be determined by the Contractor.

7.2.4 UIMG: Thyristor cubicle (Contractor supply)They shall also have the features below: In the RAL 5012 blue colour, one 400 V P + E power supply, input cables entering the lower section via packing glands on removable plates, protective index IP 54, earthing of the metal components of the cubicle, a power cut-out when the door is opened, a 0 - 10 V control device, a 400/230 V transformer if needed, a mechanical ventilation system, intensity transformers and measures sent to the local monitoring system, a "thyristor fault" floating contact.

For each cubicle, the Contractor shall also fit a device for integrating the electric power consumption transmitting the power profiles upstream of these cubicles to the supervision system, which may, for instance, be fitted in the corresponding control cubicle.

7.2.5 UIMV: variable speed drive for motors (Contractor supply)

7.2.5.1 VSD cubicle

If required, the variable speed drive shall be installed in a cubicle, with the following features: Vertical type Electro-plated zinc sheet, highly rigid, coated with an epoxy-polyester paint Maximum height 2 m Grip handle with lock type 2132A IP 54 or higher Entry of cables from the low part Connection of grounds according to CEM Temperature inside the VFD's box below 40°C.


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The installation of the VFD in the cubicle box will follow standards and specifications CEM in force,

7.2.5.2 VSD characteristics

The variable speed drive itself shall be from SCHNEIDER or ABB, for compatibility reasons, and be equipped with: an electromagnetic compatibility filter, a line inductance, an communication interface FIPIO or PROFIBUS/DP for the control and monitoring, a protection against short-circuits,

The following information will be displayed on the terminal block of the drive: Running General failure Local / remote

7.2.5.3 VSD control

The variable speed drive shall be commanded and controlled from the PLC via the bus. The VSD will always be switched ON. To start the motor, the RUN bit and the speed reference shall be transmitted by bus. The VSD shall switched OFF only in case of emergency stop or discordance. The following information will be displayed on the PLC: Running General failure Local / remote Rotation speed

7.3 Electric boxes

7.3.1 UICP : Proximity command cubicleEach electrical component which is invisible from the control cubicle and the roof smoke extraction units UAT2 shall be fitted with emergency stop equipment buttons on an IP 54 sealed casing (same function as the emergency stop equipment which is on UIAO or UIAN cubicle, that is total stop installation).

7.3.2 UICN : Fire Brigade control cubicleThe type of construction is shown in a way of indication only, on detail drawing LHCU99900009.This cubicle is intended solely for use by the firemen for the manual priority command of the equipment linked to the safety. Secured to the outside of the building (protective index IP 54), it shall preferably be of epoxy resin, orange in colour. This cubicle shall include one standard CERN Feller rotary built-in 10 A 380 V switch per damper, one for ventilation shut down, one 2 or 3 positions switch for each AHU, and one 2 or 3 positions switch for each function mode, with a CLRF KABA 8.2 safety lock, type FELLER 7414.NUPU SS 61 fitted on the front panel and a connecting terminal block.It shall comprise a synoptic diagram of the system, graven image, visible through a window in the front panel showing the layout of the identified sub systems, with, for each one, an LED-type pilot lamp showing the status "Damper open", one LED for each function mode and LED showing the operation of each AHU, LED with high lighting power.


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7.4 Electric components

Identif. Liaison mm2

Type of component Signal Reference

UIEA 3 x 1,5 Cubicle Lighting 230 V PHILIPS TMX 200 : 18 W

UIEB 3 x 1,5 Inside AHU Lighting 230 V LEGRAND 604-77 : 75W

UIEP 3 x 2,5 Cubicle 230 V sockettype CH

230 V FELLER

UIEQ 3 x 2,5 Cubicle 230 V socketType CE

230 V TELEMECANIQUE GA2-J12S

UIOA 2 x 1 Emergency stop ON/OFF TELEMECANIQUE XB2-BS542

UIOB - Key Switch 3 x 400 V TELEMECANIQUE KCC-1YZ+V2

UIOO N x 1 Key Contactor ON/OFF FELLER + lock KABA 8.2

UIOP 2 x 1 Door Contact ON/OFFTELEMECANIQUEXCKM + 2CDKD15

UITI Intensity Transformer ENERDIS, IMESYS TAQ2

7.5 Cables

A distinction is made between four families of cables: power cables, control cables, earthing cables, safety cables (fire-resistant).

They shall meet the requirements of Safety Instruction IS 23 Rev. 2 and colour code A3. They shall be marked in black indelible pencil on white labels. The cables shall be carefully laid out and also marked every 20 metres in a straight line, at each extremity and at each change of direction. They shall be laid in two layers at the most. They shall be subject to no mechanical stress when being laid. The cables running close to electric coils shall be protected by a glow screen.

The cables used for variable speed drives shall be shielded for power and control, and symmetric for power.The prices to be quoted cover the "cable layout", secured by collars to the cable carriers, their connection and marking.

For cables laid by him, the Contractor shall provide CERN, at least four months before the start of work, with a "cable book" per batch. The "cable book" shall include the cable marking, type, cross-section, number of conductors, length, origin, function, name of used cable carriers, and purpose .It shall be marked "revised" and its information shall be updated for the acceptance of the installations.

Every precaution shall be taken with regard to the environment in the transmission of the analog and digital measurements, and the peripherals, especially:

suitable connecting cable, lightning protection, galvanic insulation.

All the electrical components powered at over 50 V shall be connected to an earthing circuit.


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The earth cables shall be yellow/green. Its cross-section shall be suitable for that of the active conductors in accordance with the prevailing standards and PG requirements. The Contractor shall be responsible for the equipotential links of the metal components of the installations. It shall be made using a flexible copper braid or cable.

All the smoke extraction installations shall be powered via fire-resistant armoured power and control cables (extractors, outlets, units, etc.). These cables shall be installed in red ducts.

7.6 Cable trays

The cables shall be laid on cable carriers. The cables shall be secured to the cable trays every 3 m at the most. The cable trays and the connections between the main cable trays and the electrical components of the installations shall be supplied and fitted by the Contractor. The "power" and "control" cable trays must be physically separated. The heavy-current cable trays shall run beneath those for low currents, with a minimum distance between them and shall not be perpendicularly crossed. All the cable trays shall have an excess supporting capacity of at least 25%. They and the nuts, bolts, etc., including the securing accessories for suspended or proud fitting, shall be made of CABLOFIL or the equivalent, welded steel wire type, electro galvanised when indoors, hot-dip galvanised when outdoors. The whole structure shall be rigid. The Contractor shall ensure that the bearing structure is suitable for attachment and shall fit all the securing accessories for both suspended and proud-fitted components. The cable trays fitted by the Contractor shall be laid out in such a way as to allow a clear passage and not hamper the dismantling of equipment (valves, pipes, filters, etc.).The Contractor shall not install any cable trays before having obtained CERN's agreement.No cable shall be unsupported.

7.7 Electric connections

The Contractor shall be responsible of the connections.All the connections shall be made in accordance with normal trade practice and shall comply with the prevailing standards and the attached CERN technological requirements. No junction boxes may be fitted on runs between the points normally fitted for their connection (physical continuity). The connections required for circuit branches shall be made in boxes provided for the purpose and using terminals only. These boxes shall be marked on the diagrams and working drawings and fitted at points where they are separate and permanently accessible. The location shall be shown on the drawings. The insulated cables may be secured by collars, supports or bushes. The wiring shall be taken through the walls, partitions, flooring and roofing in bushes. The cables shall be marked before being powered. All cables without exception shall be inspected with special emphasis on the measurement of the insulation and markings. Cables shall be taken into the electric racks via packing glands.The connections shall be made on terminal blocks supplied and fitted by the Contractor. The terminal blocks shall be fitted with quick-release spring-loaded multi-input terminals (without screws) fitted with a test point. Only one conductor shall be connected to each terminal input. The internal wiring in the racks shall run in perforated plastic troughs with covers. All the cable ends shall be fitted with a crimped end-cap.Each yellow-green protective conductor shall terminate individually on a bar to ensure continuity.No more than two inputs or outputs on the same connection block shall be permitted for active conductors. If more than two conductors are to terminate on the same connection block, a busbar tail shall be used.The use of terminal-relays with several conductors clamped at the same point is forbidden.Each rack shall have a power, a control and a signalling terminal block.


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7.8 Electrical drawings

7.8.1 SpecificationAll electrical drawings shall be drawn with SEE 3000 software. The technical documentation to be placed in the cubicles shall be composed of :

Cover: standard CERN title block index front panel layout of the components in the cubicle folios of the power circuit folios of the command circuit (separation of the different tensions) list of equipment (complete nomenclature) “cable book” terminal diagrams with both starts and ends layout drawing of the equipment with position linked to schematics

7.8.2 Electrical componentsSymbols used shall be according to the IEC 617 standard.

7.8.2.1 Protecting devices

Regarding the characteristics of the protection device, the following information shall be reported : (voltage) nominal current range setting time-delaying type

7.8.2.2 Coils/relays

The marking of the relays shall be labelled as following:Kmxy : power contactorKaxy : auxiliary relay

with x: folio numbery: coil number (10 contactors coils per folio maximum)

Under each coil/relay, there shall figure : function list of auxiliary contacts (according to VDE standard)

7.8.2.3 Motors

For each motor, a table comprising the function of the item and the technical data below shall be included:

name/Item In (A) P (kW) rpm

shall be written underneath each motor.

7.8.2.4 Terminals

XP; power terminalsXC: control terminals

7.8.2.5 Transformers et other feeders

Their function and characteristics shall be defined.


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8 INSTRUMENTATION

All the sensors and actuators needed for the operation of the process shall be included in the Tender.The electrical characteristics shall comply with the industrial standards and facilitate direct interfacing with the controllers. The sensors shall be selected to meet the requirements below:

halogen-free materials (body, connection cubicle, etc.) industrial-type construction suitable for the environment (relative humidity from 0 to 90%, temperature

from -15 to 50°C, vibrations, etc.), easy accessibility, easy interchangeability, good time and temperature stability (long re-calibration intervals), precision and linearity in line with the requirements of the process, position of the instrument boxes outside the envelop of AHU’s, earth connected.

For the sake of uniformity linked to the spare parts in CERN’s store, and sake of the standardisation in all AHU’s at CERN, CERN requires the use of listed equipment.N.B.: CERN reserves the right to require the replacement of certain instruments if they are considered to be of inadequate quality.

8.1 Description of the sensors:

Identif. Measurement type Signal Range Reference Link

UBAP Dynamic pressure Measuring station

- - System o receive a UBAY - CERN supply

-

UBAY Differential Pressostat

ON/OFF 0 - 600 Pa DUNGS LGWA

with fixation

2x0,5

UBA1 Differential pressure 4-20 mA 0 - 125 Pa MODUS 2x0,5

UBA2 Differential pressure 4-20 mA 0 - 250 Pa AIRFLOW 2x1 + 2x0,5

UBA3 Differential pressure 4-20 mA 0 - 500 Pa AIRFLOW 2x1 + 2x0,5

UBA6 Differential pressure 4-20 mA

24 VDC

0 - 1000 Pa AIRFLOW, KIMO CP24CC-0/1000

2x1 + 2x0,5

UBD1 Air speed in duct 4-20 mA 0 - 14 m/s ETA, configuration CERN + Burndy x4

4x0,5

UBDV Speed and direction of wind

4-20 mA 0 - 40 m/s

0 – 360° direct

CIMA WNT – with support

4x0,5 + 2x1


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IT-2937/ST/ATLAS


UBFY Smoke Detector ON/OFF - CALECTRO UG-2-A2 stand alone 24VDC

4x1

UBHI Hygrostat ON/OFF 10-90% hr- TRAFAG HR1, ROTRONIC

2x0,5

UBHR Humidity sensor 4-20 mA 0-100% hr- NOVASINA Hygrodat

24 V DC

2x1 + 2x0,5

UBPA Barometric Pressure 4-20 mA 800 - 1200 Pa AIR FLOW PTLNZ-K 2x1 + 2x0,5

UBRR/T Temperature + Dew point

4-20 mA

24VAC

-30 / +70°CTp -20 / +30 Pr

NOVASINA TR200Burndy x4

4x0,5 + 2x1

UBRS Pyranometer 4-20 mA 0-1500 W/m2 SHILKNECHT F521.24.11, CIMA

2x1 + 2x0,5

UBTA Anti-freeze Thermostat

ON/OFF -10 / +12 °C IT-JTF2 capillary 6 ms1 2x0,5

UBTB Average Temperature

4-20 mA -15 / +80°C THERMOEST type S Cu6 M2 + Burndy x4

2x0,5

UBTH Air Thermostat ON/OFF 0-30°C JUMO, JAEGER KA 2x0,5

UBTJ Ambient Thermostat ON/OFF 0-30°C JUMO, JAEGER TA 600, WIKA TR813

2x0,5

UBTK Damper Thermostat ON/OFF 0 - 100°C ALRE IT-LR80, JAEGER K2 series

2x0,5

UBTM Coil motor Thermostat

ON/OFF 0 - 100°C See motor supplier 2x0,5

UBTO Dial Thermometer - 0 / +80°C HAENNI TBL100 -

UBTR Ambient Temperature

4-20 mA 0 / 50°C TA, ROSEMOUNT,

Delta OHM HD786T

2x0,5

UBTS Ambient Temperature + set-

point

4-20 mA 0 / 50°C SAUTER EYB2, ROSEMOUNT, TREND

4x0,5

UBTT Overheat Thermostat ON/OFF 0 / 200°C JUMO EMS5U, IT JTU-20, JAEGER TS

2x0,5

1 Manual re-arming type (provided with supports)2 provided with sensor, capillary pipe and its support2 without manual re-armingl


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UBT2 Water coil Temperature

4-20 mA -10 / +40°C ROSEMOUNT 3

HERAUS2x0,5


4-20 mA 0 / +50°C ROSEMOUNT, HERAUS, WIKA

2x0,5

UBT5 Air duct Temperature


2x0,5



2x0,5

UBT7 Air duct Temperature

4-20 mA 0 / +200°C THERMOEST, TA, WIKA

2x0,5

On/Off sensors (TOR): shall be potential free.Analogue sensors: voltage 24 V D.C., output signals to standard 4-20 mA, with integral square root extractor.

8.2 Description of the actuators

The actuators shall be of the on/off or progressive type and linked either to the automatic systems or to the regulation. They shall be inside or outside the AHU’s.

Identif. Type of actuator Link mm2 Signal Reference

UIMG Electric heater thyristor 4x1 + 2x1 0 – 10 V CHAUVIN ARNOULD – Thyritop 4

UMRE+UBLO Servo motor with recall spring

4x1 ON/OFF 24VAC

BELIMO AFS24S

UMRM+UBLP Progressive Servo motor 4x1 + 2x1 0 – 10 V 24VAC

BELIMO AM 24SR + P200

Real range 0 to 100%

UMRM+UBLP Progressive Servo motor with recall spring

4x1 + 2x1 0 – 10 V 24VAC

BELIMO LF 24 SR

UPRB Pump 5x2,5 ON/OFF 400V

KSB RIOVAR 400 VAC

UVMB Three-way valve with call back signal option

4x1 + 2x1 0 – 10 V 24VAC

BAELZ

On/off: return-spring servo-motor for air damper, power contactor for electric unit, power contactor for pump motor, power contactors for fan motors (depending on the starting type and number of speeds), etc.

3 complete sensor immersion


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IT-2937/ST/ATLAS

9 REGULATION AND MONITORING

9.1 Programmable Logic Controllers (PLC)

The PLCs shall be Schneider type TSX Premium or Siemens S7, series 300 and 400, and they shall be dimensioned by the Contractor to best fit the capacity required in each particular work. The main rack shall comprise:

- 220 V power supply module,- CPU module + DP coupler (if SIEMENS) + FlashEprom + stand-by battery,- Ethernet TCP/IP board with memory,- 30% spare capacity (CPU and I/O number),

The development software and the licences shall be supplied to CERN, and they shall be appropriated to be used from a PC platform. Each PLC shall be identified with their technical references, as well as with the inscription: "UOWC + reference number".


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