Open Tender Request for Proposal for Datacenter

Transcription

1 Thematic Unit of Excellence on Computational Materials Science (TUE-CMS) Solid State and Structural Chemistry Unit Indian Institute of Science Bangalore Open Tender Request for Proposal for Datacenter Reference No. SSCU/TUE/DC/ dated 26 th June,

2 Table of Contents 1.0 Solution Overview Physical Components Design Existing floor and DC space Detailed Product-wise scope Raised floor Sub structure pedestal assembly Stringers Other Non structural Parameters Fire Rated Gypsum Partition across the room Rack Specifications Technical specifications: PDU - Power Distribution Unit for Rack (N+1) Closed Loop Rack based cooling system High Performance Liquid Cooling Package Closed Loop Cooling Air-Conditioning Monitoring Rear Auto door Opening for Closed Loop Cooling System Precision Air conditioning Air Cooled Chillers: (N+1 Redundancy) Technical specifications: LOW SIDE WORKS: PUMPS & PIPING Security Systems Fire Detection and alarm System: Manual pull station: Very Early Smoke Detection and Alarm [VESDA] SYSTEM Introduction: Design: Principle of Operation: Rodent Repellent System: Water Leak Detection System: BUILDING MANAGEMENT SYSTEM (BMS) SCOPE OF WORK Electrical System Services Level Agreement (SLA) & Warranty General terms and conditions: USER ACCEPTANCE TEST CHECK LIST CHECK-LIST POWER CONSUMPTION CHECK LIST: Submission of Proposal PRICE BID TABLE Likely Time-line Bill of Quantities Air cooled Chiller Civil Works Cooling Racks Security products Fire Alarm VESDA

3 Water leak detection system Rodent repellent system BMS system PAC Cooling unit UPS for Pump Bidders may obtain the Request For Proposal (RFP) which includes Technical Specifications and Bill of Quantities from Ms. Bavitha, Room 209, SSCU, INDIAN INSTITUTE OF SCIENCE, C V Raman Ave, Bengaluru, Karnataka Bidders can also download RFP Documents on this Institute s website however they are required to pay tender fee in the manner as prescribed below along with Bid document. Documents must be in two cover format with technical part and commercial part in two separate sealed covers. They must be superscribed as Technical Bid' and Commercial Bid. The bids should be accompanied by a nonrefundable DD for Rs. 5,000 / - (Rs. Five Thousand only) drawn in favour of Registrar, INDIAN INSTITUTE OF SCIENCE payable at Bangalore. 3

4 1.0 Solution Overview IISc SSCU is in need of Tier 3 Data Center (DC) for its HPC server Project. This bid is to build cooling solution for High Performance Computers (HPC) along with racks, electrical cabling & Security products for DC. The room dedicated to the data center has an area of 588 sq ft. The floor to ceiling height is only 9 ft and 6 inches. The solution could use all or part of this space. The scope is for supply, installation and maintenance for a period of 5 years. The DC area should support presently 7 nos of 800 mm width server rack of 42U. Only 4 racks with a total capacity of 110kW is expected now but provision for possible addition in future of 3 more racks should be made. Chilled water based cooling solution should be provided to achieve PUE of 1.5 or lower. UPS power supply from Existing UPS of 2 x 160 kva will be provided close to the DC. The power distribution from existing UPS output panel s to racks including DB installation in Server room and individual socket for racks is in supplier scope. Dual power source per rack shall be provided. Two UPS each of capacity 160 kva and one diesel generator (DG) have already been installed and supply from these to the data center will be made available. Closed loop cooling solution ( CLC ) to support 110 kw heat load across 4 racks shall be provided & should be expandable up to 7 racks without any dependency. The closed loop cooling solution should be adaptable in case the heat load increases up to a rack density of 35 kw/rack with just addition of cooling unit as in modular datacenters. Dual chiller plant equal to or not less than 40 Tr actual capacity on ambient temperature 37 C shall be provided on N + 1 configuration. Open space behind the server room shall be used for installing chiller plant. 1.1 Physical Components Design IISc is in need of Turnkey Implementation of the Data Center including Program Management Services for Data Center Set Up. The bidder/solution provider shall submit Detailed Engineering Drawings of various components of Data Center and revise the same as required till the drawings/design is finally approved by IISc and that also includes all drawings like air conditioning, electrical system, Fire alarm systems, data cabling etc. Preparing detailed specifications and supply Installation and Commissioning of the following critical components for Data Center is required: Civil Partition & Raised floor Electrical System for Data Center cabling from UPS to DC and all cabling within DC CLC Cooling Systems Air cooled chiller and piping Power Distribution and cable management From UPS to Racks Fire alarm, suppression and VESDA system 4

5 Water Leak Detection System Pest Control (Rodent Repellent System) 1.2 Existing floor and DC space A smaller portion from given space of 12.3Mtr x 4.2Mtr may be used for DC. One fire rated door out of two provided to be used for server room after building partition wall across the space. Raised floor of 1500 USF at the height of 300 to 400 mm. Metal steps to be provided from fire rated door for entry. 1.3 Detailed Product-wise scope Raised floor A total of 588 sq ft raised floor with below spec to be provided. Unitile USF 1500 Access Floor panel of size 600x600 mm shall be all steel welded construction, with an enclosed bottom pan of 49 hemispherical and 36 reverse cones and top plain sheet which are fuse welded at 129 locations to form a panel of an overall thickness of 35mm. The panel after cleaning, degreasing, phosphating by 11 tank process is coated with micron epoxy coat and is heated to achieve maximum adhesion to the panel surface and corrosion resistance. The inner empty core of the panel is injected with a light weight fire retardant, non combustible cementitious compound at high pressure to fill in all the crevices of the panel and ensures support of not less than 90% of the top surface area of the panel. The panel is then laminated with 1.5/2.00 mm thick fire retardant floor grade Antistatic Laminate / ESD Laminate - PVC / Conductive / Dissipative PVC on a semi -automated lamination line to ensure maximum bonding to the steel surface. The edges of the laminated are protected with conductive PVC edge trim 5mm wide on all sides. This edge trim is mechanically locked and sealed in place to avoid detachment Sub structure pedestal assembly Sub structure installed to support the panel shall be suitable to achieve a minimum finished floor height of 300 mm to a maximum of 400 mm from the existing floor level. Pedestal design shall confirm speedy assembly and removal for relocation and maintenance. The assembly shall provide easy adjustment of leveling and accurately align panels for a maximum ± 25 mm in the vertical direction. Pedestals shall support an axial load without permanent deflection and an ultimate load as laid out in System Performance requirement. The Pedestal head assembly shall consist of a 75 x 75 x 3.50 mm embossed head mechanically riveted to a 100 mm long ¾ dia rolled formed stud and 2 check nuts for level adjustment and arresting vertical movement. The pedestal head shall consist of an antivibrational PVC cap for Panel location. 5

6 The Pedestal Base assembly shall consist of mm OD pipe mechanically locked on a press for perpendicularity and then welded to a base plate of 100 x 100 x 2 mm thick with stiffening folds. The sub structure assembly shall be suitably anchored to the floor with suitable adhesive or fastener as recommended by the consultant / manufacturer. All steel components shall be zinc electro plated Stringers The stringer is hot dipped galvanized steel cold rolled construction specially designed with ribs embossed on 3 sides for strength, lateral stability, and for enhanced rolling loads performance and to support the panels on all four sides for alignment. The stringer to have a counter sunk holes at both ends to accommodate bolting of M6 machine screws to the pedestal head assembly. The stringers shall be 21 x 32 x 0.8 x 570 mm length. Concentrated Loads : 675 Kgs (1500 lbf ) with a top-surface deflection under load and a permanent set not to exceed, respectively, 2.54 & 0.25 mm ( 0.10 & inch ) according to CISCA A/F, Section I Concentrated Loads Ultimate Concentrated Load: 1690 Kgs (3750 lbf ) without failing according to CISCA A/F, Section II Ultimate Loading Other Non structural Parameters Fire Rating : The Panels shall confirm to Class O & Class 1 Fire Ratings tested as per BS 476 Part 6 (Fire Propagation) & 7 (Surface spread of flame) as also ASTM E (Flammability) and ASTM E136 (Combustibility) Electrical Resistivity : As per ASTM F150/ NFPA 99 / ANSI S7.1/ CEI but modified for surface to ground to place one electrode on the floor surface and to attach the other electrode on the pedestal. Resistance to be tested at 100 / 500 volts: 1. Conductive range : 2.5x10 4 1x 10 6 Ohms (surface to ground) 2. Static dissipative range : 1x10 6-1x10 9 Ohms (surface to ground) 3. Anti static range : 1x10 9 2x10 10 Ohms (surface to surface ) 6

7 Fabrication Tolerance A. Floor panel flatness : ± 0.75 mm in any direction B. Floor panel width or length from specified size : ± 0.50 mm C. Floor panel squareness : ± 0.38 mm Installation Tolerance A. Overall level before application of any load : ± 1.5 mm over any 5.00 Sqmt ± 6 mm over any size of basic space B. Panel level : mm before the application of any load C. Panel Interchangeability installation and removal : shall be interchangeable (except for field cut panels) and replaceable in any of the four directions at 90º increments Floor grills of 600 x 600 mm floor grills 4numbers to be provided Fire Rated Gypsum Partition across the room Twin layer of 6 mm Fire resistant gypsum board to be used on both the sides of the wall stretcher. The height shall be 9.5 ft from floor to ceiling (approximately). All the windows inside the server room to be closed with gypsum board to avoid heat conductivity from outside. Putty works to be carried out on the existing wall and gypsum board and three coat of water based painting to be carried out. 1.4 Rack Specifications Server Rack 800 mm Width x 42U Height x 1200mm Depth.: 04 Nos. These racks will be used to mount and house all server/network/storage devices in the data center. The rack has to be designed to meet the safety requirements of the modern data centre. Both the front and rear door should have a handle with locking options. The rack should be suitable for baying to a high performance cooling rack. Cable entry should be entered via the roof plate and via the gland plate without affecting the climatic conditions inside the rack Technical specifications: Server Equipment Cabinets - 42U mm Width x 1200 mm Depth equipment cabinets should have adjustable 19 inch front and rear vertical mounting extrusions which are EIA- 310D and IEC compliant and allow up to 1190 mm of depth for equipment mounting (in rack the usable depth is 800 mm due to hot and cold zone within the IP54 sealed block). Balanced load rating of 1500 kg. Cabinet should be manufactured from materials and processes that are compliant with the most current TÜV/ISO environmental 7

8 management standards. The front and rear 19 inch equipment mounting rails and other internal supporting metals are to be of un-painted galvanized steel. Cabinet shall come complete with grounding kit, cage nuts and the following features and installed accessories: Front door glass door, complete with swivel handle with DIN half profile cylinder plug and universal key 333, door system with 5 or 6 points. Opening angle 180, width of the door must be 75mm smaller than the outer width of the rack. Rear door sheet steel, complete with swivel handle with DIN half profile cylinder plug and universal key 333 door system with 5 or 6 points. Opening angle 180, width of the door must be 75mm smaller than the outer width of the rack. Air separation frame for air-flow optimization and elimination of bypass airflow, consisting of mechanically joint sheets steel panels and equipped with the sealing rim. Balanced Load rating 1500 kg Bottom is flat and enables direct installation of the rack on the floor Adjustable leveling feet (6 pcs.) IP54 protection rating when installed (joined to neighboring cooling unit for closed loop) Central grounding point Rack based fire suppression fitted inside rack with max size of 4U on each rack PDU - Power Distribution Unit for Rack (N+1) Each Server and Network Rack should be fitted with 2 nos. rack mounted power Distribution unit with 24 nos. IEC C13 and 6nos. IEC C19 - for Server (high density racks); PDU shall have the capability to monitor the power consumption of the rack on which it is mounted. Protocols: SNMP, Telnet, http etc Closed Loop Rack based cooling system The Data center should be equipped with Liquid Cooling System; it is an air/water heat exchanger to remove high levels of waste heat from server enclosures and to provide uniform, effective, affordable cooling for Servers and similar IT equipment (switches etc) installed in server enclosures. Each liquid cooling system should be a closed unit consisting of a cooling system and cool either one or two server enclosures High Performance Liquid Cooling Package Closed Loop Cooling. CLC Rack CW should offer enclosure-based cooling separate from the room air and is thus also able to reduce the noise level. The unit should be capable of providing cooling 8

9 for either one or two server racks. The hot server air should be drawn off to the rear of the server rack. After cooling, it should be expelled at the rear of the rack and is thus made available to the IT equipment once more. Unit should be connected to the piping system of chilled water or anti-freeze mixture. It is suitable for the free-cooling systems because allows warmer water usage. The surface temperature of the heat exchanger is controlled by valve, which fluently modifies the cooling capacity in accordance to the actual demand. Variable speed fans help to keep always the correct airflow for all IT equipment in data center. EC motor technology used in the fans markedly reduces the annual power consumption. Both top and bottom connection of the unit is available. The air-conditioning unit s design has to be fully compatible to bystanders IT racks from the perspective of dimensions, material, color, and mechanical coupling elements. The unit in the row of the cabinets has to enable an installation of cable management, roof elements, aisle doors etc. 1.5 Air-Conditioning Air-conditioning unit includes: - Highly efficient water heat exchanger made of copper pipes and aluminum fins with a special surface. The oblique position of HX enlarges the surface, and optimizes the heat transfer. - Three stacked air filters of filtration class G4 in combustible finish for ecological disposal. The frame is ready for easy maintenance and filter replacement. - Five or more hot-swap radial fans with EC motors significantly reducing the power consumption with fluent speed change and operation feedback to the control system. - Controller with software for independent control of all components, running also in case of interruption of communication between units or central display. - Minimum Four temperature sensors located in the front and rear side monitoring the air temperature in the upper and lower part of the space. Sensors could be calibrated from controller. Controller enables to change the logic between average and maximal values, and arranges substitutability in case of failure. - Two humidity sensors located at the bottom of front and rear part of the unit for precise monitoring of the room conditions. - Air-conditioning unit, with D in the type code, includes color touch screen in the front door. 4.3 large display is equipped with special software for monitoring and control of up to 10 units. It enables communication through TCP/IP protocol, remote control via Ethernet and implemented webserver, and 9

10 Functions: easy SW upgrading and data downloading via USB disk or SD card. Another function implementation is possible on special request. - The basic task is to cool down the air from the hot zone of datacenter and distribute it to the cold zone in front of the IT equipment. The unit is designed to keep the constant temperature in both zones thanks to the water valve adjustment and variable fan speed. - If the humidity in the hot zone is within the limits set by an administrator, then the unit s internal logic tries to avoid any condensation of the air moisture, maximize the cooling efficiency, and minimize influence on the humidity climate of the room. - If the measured air humidity is above the set point, then the unit is automatically switched to the dehumidification mode, and actively supports the surface condensation to decrease the humidity in the room. The resulted condensate is discharged to the drainage. - The unit can be equipped by integrated steam humidifier which increases the room humidity to the set point. - Units could be connected to bigger groups under a superior control with advanced control logic (sequencing, team working, overload start, etc.) Technical specifications: Adaptable cooling output : Equal to or greater than 30kW. Installed fans: 4 Minimum Air throughput: Equal to or greater than 3800 m³/h Cooling output : Equal to or greater than 30 kw Air intake temperature: 35 C Water inlet temperature: as required Medium: Water Coolant throughput: approx. 60 l/min Pressure loss: approx. 1 bar Voltage: 208/230 V, 1~, 50 Hz, 400 V, 3~, N, 50 Hz 10

11 Colour: NA Usable installation height: free (standard: 42 U) Dimensions: WxHxD: 300 or 600 x 2000 x 1200 mm Touch screen display, Connection hose, bottom/top: 2.0 Monitoring 8 intelligent ports (output/input, 0-5V) with auto sense on main device with 4 expansion ports Expandable solutions through expanders connected in daisy-chain with patch cables Intelligent port presented by RJ-45 for connection and extension by patch cable Options to upload picture and with a function grab & drop able to place sensors icon in Multi language with a possibility to create own language version inside of device 80 virtual sensors for connecting and reading a values from SNMP devices, Modbus devices and Ping , SNMP trap, Modbus control, skype call & sms, speech Support a sending keep alive s in configurable interval SNMP v1, v2 & v3 Support DHCP and NTP Fully embedded TCP/IP and web-server with Linux OS A standalone product without any external hardware and software dependencies. Configurable User & group management for login protected by password Network Management System Integration. Free Firmware Updates History for measured values, able to show a graphs and statistics by day, week, month and year (average, high and low data) 4 levels of thresholds, advance setting with (alarm report off) calender Internal Syslog with options to send a logs to the external syslog Status indicators on front panel (Power, Connectivity, Sensors online and threshold status) USB 2.0 port for options to connect GSM modem for sending alarm SMS without requirements of 3rd party SW Support Modbus RTU and TCP/IP Built in speaker Support dual one-wire probes (temperature & humidity) 1U Rack Mount Standard Network interface Mbps Full Duplex Operating environment Temperature: -35 C 80 C; Humidity: 20% - 80% (Non-Condensing) 11

12 Power consumption less than 2 Watt Battery backed time of day clock for an accurate system date and time Power Adapter with C-14 socket and Power cord 3.0 Rear Auto door Opening for Closed Loop Cooling System All closed looped racks should be fitted with automatic door opening kit for the back door. Door should automatically open in case of Alarm on temperature. The auto door control unit should be connected on SNMP TCP/IP for monitoring and control. 3.1 Precision Air conditioning Computer Room AC (CRAC/PAC): EC fans with highly advanced digital controller to take care server room cooling requirements & controlling humidity. Gas based unit to be quoted with 15 mtr copper piping works. SNMP card should be provided. 9 mm thick Nitrate rubber mate should be passed under the raised floor on the true surface of insulation. Make: Emerson / Stulz / Uniflair / Conteg / Climaveneta Capacity 3 or 4 TR with 1+1 redundancy Formatted: Font: Bold 3.2 Air Cooled Chillers: (N+1 Redundancy) The design of the Chiller of actual capacity of 40 TR or higher has the following specifications. Chillers should have all protections and interlock arrangement like LP, HP, OP, Safety thermostat (Anti freezing) in the evaporator, phase reversal, water flow switch in chilled water lines, chilled water pump. The interlocks shall be provided with indicating lamps or flags on the control panel in the air conditioning plant room. All these shall have by-pass push button switches. Formatted: Line spacing: single Chiller will be used in cooling water for Liquid cooling racks chiller should have compact design with control components on the front and air intake via the right-hand side panel, air outlet via the left-hand side panel. It should be pressure-sealed system. It should have Digital thermostat for temperature control with set point and actual value display. It should have a tank and pumps to supply adequate water to the cooling racks. Two separate UPSs (1+1 in parallel) of 20kVa with 15 Mins battery backup for each UPS should be provided for chilled water distribution such as pumps, Make of the UPS Eaton, Emerson, APC, Socomec. There must be an insulated storage tank of 1000 Ltr capacity to take care of the cooling during power failure. 12

13 3.3 Technical specifications: Application details Criticality (Normal/High) Heat load Specifications High 140 kw / Equal to or greater than 40 TR actual capacity Chiller Capacity 140 kw / equal to or greater than 40 TR x 2 Cooling media specification Required media temperature Required media flow rate and pressure per chiller Type of flow (constant or varying) Location of chiller wrt to machine (horizontal and vertical distance) Media quality Allowed media hold-up volume in piping per chiller Installation site (Indoor or outdoor) Min and max ambient temperature at site Ambient air quality (normal/dusty/saline/acidic) State / city where chiller is being installed Ventilation at site (good/poor) Recommendation for ventilation (if poor) Clearance around chiller (in meters) Recommended interconnect piping Soft water As required or 7 deg.c minimum of 400 lpm at pressure of 3 kg/sq. cm. Constant Not to exceed 40 meters head Treated soft water Up to 50 liters per chiller Out-door 12 0 C to 40 0 C Normal Bangalore Good None 1.5 to 2 m MS Pipes 13

14 MOC Recommended interconnecting pipe dia Recommended piping insulation MOC Recommended piping insulation thickness Recommended piping accessories Recommended interlocks from chiller to process Remote control panel for chiller Rated Chiller Cooling Capacity (TR / KW) 3 dia TF quality Thermocole 2 50mm As per std practice SNMP NA Equal to or greater than 40 TR No. of chillers for this project Equal to or greater than 40 TR x 2 Refrigerant Rated media temperature Operating media temperature range Tolerance for rated media temperature (+/-) Rated media flow pressure per chiller Rated ambient temperature Min and Max operating ambient temperature Type of compressor R 407C As required As required or 7 0 C to 12 0 C +/- 2 0 C 4 bar 38 0 C 12 0 C to 45 0 C Scroll No. of compressors per chiller >3 Type of condenser Air cooled 14

15 No. of condensers per chiller 3 Type of evaporator Shell and tube No. of evaporators per chiller Minimum 2 Media reservoir holding capacity (liter) per chiller 1000 liter External Tank No. of pumps per chiller 1 Chiller inlet outlet dia and end connection type 2.0 dia BSP female connector No. of skids per chiller 1 Dimension of each chiller package Power supply (W)2550 x 2550(D) x 2300(H) 3 PH, 415 V, 50 HZ Energy consumption in KWh / Amps Chiller safety interlock list Others Approximately 1.2 kw per TR. HP, LP, COMP OLR, FAN OLR, PUMP OLR, WATER LEVEL, AFT, FAN CYCLING, SPP PLC FOR SEQUENCING OF CHILLERS Communication interface : SNMP 4.0 LOW SIDE WORKS: PUMPS & PIPING This should conform to Tier 3 standards. The piping should take into account the possibility of both chillers operating at the same time in future. Also it should provide for the addition of a third chiller for future expansion. The pumps should be selected as per the total water requirement (Q) for the cooling racks keeping in mind the min/max. Water required in chiller cooler. While selecting/designing the pump, proper balancing to be done between the flow required for all cooling racks and cooler water flow requirement. 15

16 The selection of the pump should be such that all cooling racks and chiller cooler should get designed water flows. The pump head should be selected as per the inlet pressure required in cooling rack after taking into account piping head losses, cooling rack airwater heat exchanger pressure drop etc. At least one identical pump is to be provided for redundancy. The pump shall be capable of developing the required total head at rated capacity. The pump shall run smoothly without undue noise and vibration. Suction & discharge connection shall be flanged Pump impeller shall be dynamically and statically balanced. All accessories required for proper and safe operation shall be furnished with the pump. The power rating of pump motor shall be adequate for the requirement, and shall be clearly specified in the technical bid. Make and type of pump, along with all details of shaft, impeller, sealing, coupling, nozzle orientation and flange drilling shall be submitted in the technical bid. The vendor shall furnish routine and type test certificate of the pump in original as per IS HQ characteristic curve also to be submitted. Chillier system to be used in cooling water for rack-based cooling system specified above is required to be provided by the vendor. The system should have the ability to automatically shut down or start modules according to the heat dissipation requirement at the cooling racks. Supply and return pipes including headers from chillers & pumps other than inside Data Centre should be In MS. All pipes shall be insulated using thermo cole sleeves of adequate thickness to avoid condensation on pipes. Provide a protection coating for chillers and pumps. 5.0 Security Systems The DC is a mission critical facility with 24/7 operations. Server room should be designed with Integrated Fire alarm, VESDA, water leakage detection & Rodent repellent system. 16

17 5.1 Fire Detection and alarm System: Fire Detection system is a firsthand safety tool to detect the fire, if present, and raise an alarm so as to initiate action. All the detectors are connected to an Analogue Fire Alarm Panel, which indicates the Detector on Fire. 5.2 Manual pull station: In case any fire occurs in the building premises and one wants the hooter to alert the people in the building to assemble in the safe assembly point, one can pull the nearest manual pull station. Panel needs to be RESET to bring back to normal condition. S.N O Description Supply & installation of 4 Zone Conventional Fire alarm panel with Battery Back Supply & Installation of multi Sensor Smoke detector with Base plate Supply & Installation of Strobe with Electronic Hooter Model Notifier/Ravel Notifier / Ravel Insyin Quanti ty Unit 1 Nos 12 Nos 2 Nos 4 Supply & installation of Response Indicator Insyin 4 Nos Supply & installation of Manual Call point with back Insyin 5 2 Nos box 6 Supply of laying of 2 core 1.5sqmm FRLS cable ISI 150 Nos 5.3 Very Early Smoke Detection and Alarm [VESDA] SYSTEM Introduction: The VESDA is a programmable, intelligent controlled, self-contained air sampling smoke detector. The VESDA or the very early smoke detection system that provides the highest sensitivity appropriate for detecting a complete range of smoke particles produced in incipient stage and real fires involving natural or synthetic materials. It comprises of an air sampling system, filter assembly, aspiration system, detector and control system Design: The VESDA uses a unique technology, an intense broadband light source (XENON Strobe Light) in order to closely emulate the spectrum and intensity of sunlight itself. The system has a photoelectric receiver which is used to gather the scattered light having a 17

18 broadband spectrum. This broadband spectra response makes the detector respond to all particle sizes. The smoke particles produced during real or incipient fire shall depend on the fuels involved and combustion temperatures. Thus a broadband spectrum method of detection performs well for a complete range of fuels and through the process of fire. S.N O Description Model Quantit y 1 Supply & installation Aspiration detector for Server Room -Xtralis VF250 Xtralis 1 Nos 2 Supply & Installation of Power Supply Unit with Battery back-up Xtralis 1 Nos 3 Supply & installation air termination Nozzle & capillary tubes Xtralis 6 Nos 4 Supply & Installation of 25mm PVC trunk Conduit with accessories ISI 20 Nos 5 Supply of laying of 2 core 1.5sqmm FRLS Armode cable ISI 15 Nos 6 Supply & Installation Electronic hooter ISI 1 Nos Unit The VESDA system is protecting the Server of the DC with very early warning of smoke detection and alarm. The air sampling is done in all the three voids of the Server room and the Network room i.e., below the false floor, room void and above the false ceiling. This gives very early warning in case of fire in any of these three voids Principle of Operation: The aspirator draws the air from the protected areas through the air-sampling network, through the multi stage filter assembly to screen out the large airborne dust particles and through the specially constructed detector head where it is exposed to a broadband spectrum of light. Light scattered by the particles pass through a series of optical components to an extremely sensitive solid-state light receiver. The receiver converts the light energy into an electronic signal representing the level of smoke in the air sample. The receiver sends this signal to a microprocessor where it is processed and presented on the bar graph display as one of many lighted segments. This activates the alarm indication when appropriate. 5.4 Rodent Repellent System: Ultrasonic Frequency sound wave based system has to be installed in DC & UPS Room S.N O 1 2 Description Supply & installation of Rodent repellent panel Supply & Installation of High frequency Transducer 18 Model C System C System Quantit y Unit 1 Nos 12 Nos