Group Code:
ST/CV
The Large Hadron Collider Project
IT-2937/ST/ATLAS
Annex 1 : Technical Requirements
Abstract
The 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
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Table of Contents
1
AHU: AIR HANDLING UNIT ...................................................................................................................... 1
1.1
IDENTIFICATION SYSTEM ........................................................................................................................... 1
1.2
CONSTRUCTION OF THE AIR HANDLING UNITS (AHU) .............................................................................. 1
1.2.1
Panels of the AHU’s.......................................................................................................................... 1
1.2.2
Structure, sections, and support ........................................................................................................ 1
1.2.3
Assembly of the panels ...................................................................................................................... 2
1.2.4
Air-tightness ...................................................................................................................................... 2
1.2.5
Sections of the AHU forming a box ................................................................................................... 2
1.2.6
Inside AHU lighting .......................................................................................................................... 3
1.2.7
Sight window ..................................................................................................................................... 3
1.2.8
Fire resistance .................................................................................................................................. 3
1.2.9
Earthing ............................................................................................................................................ 3
1.2.10
Handling ........................................................................................................................................... 3
1.3
FANS (UU)................................................................................................................................................. 4
1.3.1
General characteristics ..................................................................................................................... 4
1.3.2
Fan type UUDC ................................................................................................................................ 4
1.4
MOTOR OF FAN (UM) ................................................................................................................................ 5
1.4.1
General characteristics ..................................................................................................................... 5
1.4.2
Types of motors ................................................................................................................................. 5
1.5
SERVO-MOTORS ......................................................................................................................................... 5
1.6
HEAT EXCHANGERS (UE) .......................................................................................................................... 6
1.6.1
Characteristics shared by all the types of heat exchanger ................................................................ 6
1.6.2
Characteristics shared by the water coils ......................................................................................... 6
1.6.3
Chilled water coil UEGZ .................................................................................................................. 6
1.6.4
Electric heaters UEEZ ...................................................................................................................... 6
1.6.5
Humidification system ....................................................................................................................... 7
1.7
AIR FILTERS (UF) ...................................................................................................................................... 8
1.7.1
General ............................................................................................................................................. 8
1.7.2
Metal pre-filters UFPZ ..................................................................................................................... 8
1.7.3
Multi-V pleated filters UFFM (multidiedral) .................................................................................... 8
1.7.4
Absolute filters UFAM ...................................................................................................................... 8
1.7.5
Filter classification ........................................................................................................................... 9
2
VENTILATION DUCTS.............................................................................................................................. 10
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
3
CONSTRUCTION ....................................................................................................................................... 10
DUCT SUPPORTS....................................................................................................................................... 10
ACCESS TRAPS ......................................................................................................................................... 10
MANUAL ADJUSTING DAMPERS UVMM .................................................................................................. 10
MEASURING STATIONS ............................................................................................................................. 10
THERMAL INSULATION ............................................................................................................................ 11
BALANCE ................................................................................................................................................. 11
SHEET THICKNESS .................................................................................................................................... 11
TEXTILE DUCTS: UGTX........................................................................................................................... 11
CONSTRUCTION CRITERIA AND OPERATING CONDITIONS ......................................................................... 12
ACCESSORIES ............................................................................................................................................ 13
3.1
3.2
3.3
3.4
3.5
RETURN AIR GRILLE: UQGA ................................................................................................................... 13
JALOUSIE GRILLE ..................................................................................................................................... 13
AIR DISPLACEMENT TERMINAL: UQUD ................................................................................................... 13
MOTORISED DAMPER UVUM (FRESH AIR) AND UQCM (RETURN AIR) .................................................... 13
THREE WAY VALVE: UVMB (WITH FLANGE AND COUNTER FLANGE) ...................................................... 13
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4
MARKING .................................................................................................................................................... 14
4.1
EQUIPMENT IDENTIFICATION ................................................................................................................... 14
4.2
DUCT IDENTIFICATION............................................................................................................................. 14
4.2.1
Location of the identification .......................................................................................................... 14
4.2.2
CERN colour code .......................................................................................................................... 14
4.2.3
Air flow direction ............................................................................................................................ 14
4.2.4
Circuit designation ......................................................................................................................... 15
4.2.5
Example of identification symbol.................................................................................................... 15
4.2.6
Application of the symbols .............................................................................................................. 15
4.3
IDENTIFICATION OF THE ELECTRIC COMPONENTS .................................................................................... 15
5
ACOUSTIC ................................................................................................................................................... 16
5.1
5.2
5.3
ACOUSTIC BAFFLES ................................................................................................................................. 16
ACOUSTIC INSULATION ........................................................................................................................... 16
AIR HANDLING UNITS .............................................................................................................................. 16
6
METAL STRUCTURES.............................................................................................................................. 17
7
ELECTRICAL WORK ................................................................................................................................ 18
7.1
BASIS FOR CALCULATIONS ...................................................................................................................... 18
7.1.1
Circuit-breaking capacity ............................................................................................................... 18
7.1.2
Mechanical strength ....................................................................................................................... 18
7.1.3
Equipment selection ........................................................................................................................ 18
7.1.4
Environment ................................................................................................................................... 18
7.2
ELECTRIC CUBICLES ................................................................................................................................ 18
7.2.1
Overall design of the electric cubicles (Contractor’s supply) ........................................................ 18
7.2.2
UIAC: power cubicle (Contractor supply) ..................................................................................... 19
7.2.3
UIAO: Control cubicle (Contractor supply) ................................................................................... 21
7.2.4
UIMG: Thyristor cubicle (Contractor supply) ............................................................................... 21
7.2.5
UIMV: variable speed drive for motors (Contractor supply) ......................................................... 22
7.3
ELECTRIC BOXES ..................................................................................................................................... 23
7.3.1
UICP : Proximity command cubicle ............................................................................................... 23
7.3.2
UICN : Fire Brigade control cubicle .............................................................................................. 23
7.4
ELECTRIC COMPONENTS .......................................................................................................................... 24
7.5
CABLES ................................................................................................................................................... 24
7.6
CABLE TRAYS .......................................................................................................................................... 25
7.7
ELECTRIC CONNECTIONS ......................................................................................................................... 25
7.8
ELECTRICAL DRAWINGS .......................................................................................................................... 26
7.8.1
Specification ................................................................................................................................... 26
7.8.2
Electrical components .................................................................................................................... 26
8
INSTRUMENTATION ................................................................................................................................ 28
8.1
8.2
9
DESCRIPTION OF THE SENSORS: ............................................................................................................... 28
DESCRIPTION OF THE ACTUATORS ........................................................................................................... 30
REGULATION AND MONITORING ....................................................................................................... 31
9.1
PROGRAMMABLE LOGIC CONTROLLERS (PLC) ....................................................................................... 31
Annex 1: Technical Requirements
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Vocabulary
Term
AHU
CAMM
CDD
CIT
DQE
EDMS
EJP
FMECA
HPGL
ISO
PDF
PLC
QAP
TCP/IP
TCR
TDS
TF
TQ
UIAC
UIAO
UICN
VSD
Definition
Air Handling Unit
Computer assisted Maintenance Management.
CERN Drawing Directory
« Power Supply Cubicle Intelligent Control »
Description and Quantities Estimate
Engineering Data Management System.
Reduce power operation mode.
Failure Mode Effects and Criticallity Analysis
Hewlett Packard Graphics Languages
International Standardisation Organisation
Portable Document File
Programmable Logic Controller
Quality Assurance Plan
Transmission Control Protocol / Internet Protocol
Technical Control Room
Technical Data Server
Tender Form document
Technical Questionnaire
Electric power cubicle « Normal Power»
Electric control cubicle « Normal Power»
Firemen control cubicle
Variable speed drive
Annex 1: Technical Requirements
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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’s
The 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/m3).
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 specification
For 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 support
Each 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 panels
All 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)
Leakage limit (litre’s per second per square metre
of the outside surface of an assembly)
Static pressure limit
P
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:



1.2.5.3
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.
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 lighting
The 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 window
Each lighted section of AHU shall be designed with a air proof double glass window, halogen free.
1.2.8 Fire resistance
All 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 Earthing
Each 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 Handling
Each 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 characteristics
The 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 lubricatedfor-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 moderatelyclogged 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 UUDC
Centrifugal 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 characteristics
Before 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 motors
The 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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IT-2937/ST/ATLAS


1.6
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.
Heat exchangers (UE)
1.6.1 Characteristics shared by all the types of heat exchanger
Like 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 coils
The 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 UEGZ
The 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 UEEZ
The 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
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distribution of the heat emitted by all the elements. The operating voltage shall be 400 (+10, -15%) V +
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 system
The 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.
Annex 1: Technical Requirements
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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 UFPZ
Filtration 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 UFAM
Filtration 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.
Annex 1: Technical Requirements
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1.7.5 Filter classification
Type of filter
Classification
EN 779-95
G1
Coarse filters
65  % < 80
G3
80  % < 90
90  %
Mean efficiency E
F5
40  % < 60
F6
60  % < 80
F7
80  % < 90
F8
90  % < 95
F9
Absolute filters
Mean degree of separation Ä
55  % < 65
G2
G4
Fine filters
%
95  %
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
Annex 1: Technical Requirements
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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 doubleskinned 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
Dimensions
as per
drawings
Dimensions as
per drawings
25
25
Double skin
assembled with copper electrical
continuity braid, min. cross-section 35
mm2
Insulation
Fireproof panel rockwool
insulation, density: 70 kg/m3 with
external aluminium foil for
double skin circuit.
Insulation thickness (mm)
Test conditions
- under pressure (Pa)
+ 1 500
- in depression (Pa)
max. leakage rate (l/s.m2)
- 1 500
0,8
0,8
Leakage shall be tested during the
works according to Eurovent
standards methods.
Annex 1: Technical Requirements
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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 airtightness 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
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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 identification
These 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 be shown at well-lit points.
the symbols shall not be obscured by parts of the structure, other ducts, various installations or
other distribution service systems,
4.2.2 CERN colour code
The 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
Smoke extraction
General extraction
Supply
Colour
red
yellow
blue blue blue on white background
4.2.3 Air flow direction
The 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.
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4.2.4 Circuit designation
The 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.:



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 tunnel
2 = accessible area
3 = 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 = right
G = left
C = centre
The above characters shall be black with the symbol colour inside.
4.2.5 Example of identification symbol
triangle colour : red
DM2D
- 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 symbols
Several methods may be used, provided that they are permanent and final:


4.3
Painted,
metal plate.
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 capacity
The 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 strength
This 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 selection
The 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 shortcircuit currents at their point of installation.
7.1.4 Environment
The 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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IT-2937/ST/ATLAS
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,
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




one 230 V on indicator lamp,
one 24 V A.C. on indicator lamp,
one flashing orange general fault lamp,
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
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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,
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,
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


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:









7.2.5.2
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.
The installation of the VFD in the cubicle box will follow standards and specifications
CEM in force,
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:



7.2.5.3
Running
General failure
Local / remote
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
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7.3
Electric boxes
7.3.1 UICP : Proximity command cubicle
Each 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 cubicle
The 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 socket
type CH
230 V
FELLER
UIEQ
3 x 2,5
Cubicle 230 V socket
Type CE
230 V
TELEMECANIQUE GA2-J12S
UIOA
2x1
Emergency stop
ON/OFF
TELEMECANIQUE XB2BS542
UIOB
-
Key Switch
3 x 400 V
TELEMECANIQUE KCC1YZ+V2
UIOO
Nx1
Key Contactor
ON/OFF
FELLER + lock KABA 8.2
UIOP
2x1
Door Contact
ON/OFF
TELEMECANIQUE
XCKM + 2CDKD15
UITI
7.5
Intensity Transformer
ENERDIS, IMESYS TAQ2
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.
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All the electrical components powered at over 50 V shall be connected to an earthing circuit.
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.
Annex 1: Technical Requirements
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IT-2937/ST/ATLAS
7.8
Electrical drawings
7.8.1 Specification
All 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 components
Symbols 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 :




7.8.2.2
(voltage) nominal current
range setting
time-delaying
type
Coils/relays
The marking of the relays shall be labelled as following:
Kmxy : power contactor
Kaxy : auxiliary relay
with
x: folio number
y: coil number (10 contactors coils per folio maximum)
Under each coil/relay, there shall figure :


7.8.2.3
function
list of auxiliary contacts (according to VDE standard)
Motors
For each motor, a table comprising the function of the item and the technical data below shall be
included:




7.8.2.4
name/Item
In (A)
P (kW)
rpm
shall be written underneath each motor.
Terminals
XP; power terminals
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XC: 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
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
0 - 1000 Pa
AIRFLOW, KIMO
CP24CC-0/1000
2x1 + 2x0,5
with fixation
24 VDC
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
CIMA WNT – with
support
4x0,5 + 2x1
0 – 360° direct
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Identif.
Measurement type
Signal
Range
Reference
Link
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
2x1 + 2x0,5
24 V DC
UBPA
Barometric Pressure
4-20 mA
800 - 1200 Pa
AIR FLOW PTLNZ-K
2x1 + 2x0,5
UBRR/T
Temperature
+ Dew point
4-20 mA
-30 / +70°C
Tp -20 / +30 Pr
NOVASINA TR200
Burndy 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
ON/OFF
0-30°C
JUMO, JAEGER KA
2x0,5
ON/OFF
0-30°C
JUMO, JAEGER TA 600,
WIKA TR813
2x0,5
ON/OFF
0 - 100°C
ALRE IT-LR80, JAEGER
K2 series
2x0,5
UBTH
UBTJ
UBTK
Air Thermostat
Ambient Thermostat
Damper Thermostat
24VAC
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,
2x0,5
UBTS
Ambient
Temperature + setpoint
4-20 mA
0 / 50°C
SAUTER EYB2,
ROSEMOUNT, TREND
4x0,5
UBTT
Overheat Thermostat
ON/OFF
0 / 200°C
JUMO EMS5U, IT JTU20, JAEGER TS
2x0,5
Delta OHM HD786T
1
Manual re-arming type (provided with supports)
provided with sensor, capillary pipe and its support
2 without manual re-armingl
2
Annex 1: Technical Requirements
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IT-2937/ST/ATLAS
Identif.
Measurement type
Signal
Range
Reference
Link
UBT2
Water coil
Temperature
4-20 mA
-10 / +40°C
ROSEMOUNT 3
HERAUS
2x0,5
UBT3
Water coil
Temperature
4-20 mA
0 / +50°C
ROSEMOUNT,
HERAUS, WIKA
2x0,5
UBT5
Air duct
Temperature
4-20 mA
0 / +50°C
ROSEMOUNT,
HERAUS, WIKA
2x0,5
UBT6
Water coil
Temperature
4-20 mA
0 / +100°C
ROSEMOUNT,
HERAUS, WIKA
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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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".
Annex 1: Technical Requirements