a 1 44lk-5100-718m.020029a4 job specification air conditioning system

7/21/2019 A 1 44LK-5100-718M.020029A4 Job Specification Air Conditioning System

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HINDUSTAN PETROLEUM CORPORATION LIMITED

MUMBAI REFINERY

DOCUMENT NO: 44LK-5100-718/M.02/0029/A4

TITLE: JOB SPECIFICATION

FOR

AIR-CONDITIONING SYSTEM

Rev No. Issue Date Pages Rev Description Prepared By Checked By Approved By

P 01 Feb 10 26 Issued for Client

approval

ASK PDB SNG

A 03 May 10 26 Issued for Enquiry ASK PDB SNG

B 23 Nov 10 26 Issued for Enquiry SRC PDB SNG

C 07 Apr 11 26 Revised and Issued

for Enquiry

SRC PDB SNG

D 05 Oct 11 26 Revised and Issued

for Enquiry

SRC PDB SNG



HPCL, MUMBAI Job Specification for

AIR-CONDITIONING SYSTEM44LK-5100 Doc.No: 44LK-5100-718/M.02/0029/A4 of 26


TABLE OF CONTENTS

1.0 INTRODUCTION 3 2.0 SCOPE 3 3.0 PROJECT INFORMATION 3 4.0 CODES AND STANDARDS 4 5.0 BASIS OF DESIGN 6 6.0 GENERAL REQUIREMENT 9 7.0 VENDORS SCOPE OF WORK 18 8.0 PURCHASER’S SCOPE OF WORK 22 9.0 QUALITY ASSURANCE AND QUALITY CONTROL 23 10.0 INSPECTION & TESTING 23 11.0 GUARANTEE 24 12.0 VENDOR DATA REQUIREMENT 25 13.0 EQUIPMENT QUALIFICATION CRITERIA FOR MAJOR BOUGHTOUT ITEMS25



HPCL, MUMBAI Job Specification forAIR-CONDITIONING SYSTEM

44LK-5100 Doc.No: 44LK-5100-718/M.02/0029/A4 of 26


1.0 INTRODUCTION

This document covers the minimum requirements for design, manufacturing, inspection andtesting, supply, erection, commissioning and proving performance guarantees of Air-conditioning system (Substation and Control room) for the HPCL, Mumbai refinery.

2.0 SCOPE

2.1 This specification along with the equipment data sheets describes the minimum requirementsfor design, engineering, manufacturing, procurement, inspection and testing, shop test,painting, supply, packaging and forwarding, transportation up to project site, complete erectionand commissioning, providing performance guarantee and mechanical guarantees of completeAir-conditioning system along with all its accessories as a complete LSTK package.

2.2 It is not the intent to specify completely all details of design and construction; nevertheless, the

equipment shall conform in all respects to high standards of engineering, design, quality ofmaterials and workman-ship incorporating latest technology suitable for continuous operationas well as long idle periods, if required. All materials shall be adequate for the proposed serviceand guarded against erosion & corrosion.

2.3 Any piece of equipment, instrument and accessories not specifically mentioned here but whichare essential for the equipment to make it safe and operable, consistent with good engineeringpractice shall be provided and deemed to have been included in vendor’s scope of work

2.4 Vendor shall make all possible efforts to comply strictly with the requirements of thisspecification and other specifications/ attachments. In case deviations are considered essentialby the manufacturer (after exhausting all possible efforts) these shall be separately listed in theproposal under separate section listed as “List of deviations/ exceptions”. Deviation shall belisted separately for each document with cross reference to page no. / section/ clause no/ para

etc. of the respective document supported with proper reasons for the deviation for Owner /Consultatnts consideration. Any deviation not listed under the above section, even if reflectedin any other portion of the proposal shall not be considered applicable. No deviation orexception shall be permitted without the written approval of Owner / Consultatnts.

2.5 Compliance with this specification shall not relieve Vendor of the responsibility of furnishingequipment and accessories/ auxiliaries of reliable design, materials and workmanship to meetthe specified start up and operating conditions. In case Vendor considers requirement ofadditional instrumentation, controls, safety devices and any other accessories / auxiliariesessential for safe and satisfactory operation of the equipment, he shall recommend the samealong with reasons in a separate section along with his proposal and include the same in hisscope of supply.

3.0 PROJECT INFORMATION

3.1 GENERAL

Purchaser : Hindustan Petroleum Corporation Ltd.

Consultant : Jacobs Engineering India Pvt. Ltd., Navi Mumbai

Contractor : Selected vendor

Plant : Diesel Hydrotreater Project – OSBL






Location : Mumbai Refinery

3.2 For site conditions, utility data & other details refer attached Basic engineering designbasis(BEDB) doc. no. 44LK-5100-00/P.02/0001/A4

4.0 CODES AND STANDARDS

4.1 The codes and standards to be followed by vendor for design, construction, testing of theequipment shall be as listed below.

Apart from the various codes and standards listed below, vendor shall have to comply withother requirement of codes and standards mentioned in the attached specifications for detailedengineering, design, manufacture, testing and commissioning and performance tests. Latestedition of following codes and standards shall be followed.

The equipment shall comply with all currently applicable statutes, regulations and safety codesrelated to the design, construction and operation in the locality where the unit will be installed.Nothing in this specification shall be construed to relieve the vendor of responsibility for reliabledesign, workmanship and materials to meet the specified conditions.

4.2 The equipment shall generally conform to the applicable sections of the latest editions of thefollowing standards and codes:

4.2.1 International/ Indian standards:

ASHRAE : American Society of Heating, Refrigerating and Air ConditioningEngineers.

API : American Petroleum Institute

ASME : American Society of Mechanical Engineers

AGMA : American Gear Manufacturer’s Association.

NFPA : National Fire Protection Association

TEMA : Standards of Tubular Exchanger Manufacturers’ Association

ASME Sec VIII Div I & II : Unfired Pressure Vessel code.

IBR : Indian Boiler Regulations

OSHA : Occupational Safety and Health Administration

OISD : Oil Industry Safety Directorate Standards

SMACNA : Low pressure Duct Construction Standards (Sheet Metaland Air Conditioning Contractors National Association,

Inc.)

ARI : Air Conditioning and Refrigeration Institute

71.04-1985 : ISA Standard – Environmental Equipment Conditions forProcess Management and Control Systems, Airborne

Contaminants

ISA 277 : Galvanised steel sheet

IS 655 : Metal air duct

IS 659 : Safety code for air conditioning

IS 660 : Safety code for mechanical refrigeration

IS 732 : Code of practice for electrical wiring installation

IS 1646 : Code of practice for Fire safety of buildings




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IS 2041 : Steel plates for pressure vessels used at moderate and lowtemperature

IS 2065 : Code of Practise for Water Supply in Buildings

IS 2312 : Propeller type AC ventilating fans

IS 2379 : Colour Code for identification of pipelines

IS 3043 : Code of practice for earthing

IS 3103 : Code of Practice for Industrial Ventilation

IS 3588 : Electric Axial Flow Fans

IS 3716 : Application Guide for Insulation Coordination

IS 4894 : Centrifugal Fan

IS 5571 : Guide for Selection of Electrical Equipment for Hazardous Areas

IS 8148 : Packaged Air Conditioners

IS 2148 : Flame Proof Enclosures of Electrical Apparatus

IS 325 : Three Phase Induction Motors

IS 3963 : Roof Extract UnitsIS 1391 : Part 1 : Room Air Conditioners-Specification: Part I

Unitary Air conditioners

IS 7896 : Data For Outside Condition for Air conditioning for Indian Cities

IS 14377 : Specification for 3 Phase Induction Motors for Fans Used In Airconditioners and in Ventilation

C.T.I. Std. ATC 105 : Acceptance Test Code for Cooling towers

C.T.I. Std. STD 111 : Gear Speed Reducers for cooling towers

IS 1893 : Criteria for earth quake resistant design of structure

IS 875 : Wind load analysis for design of structures

IS 3042 : Sluice gate

ASME B 16.5 : Pipe flanges and flanged fittingsISO 10816 –3 : Mechanical vibration - Evaluation of machine vibration by

measurements of non-rotating parts

IS 3589 : Seamless or Electric welded steel pipes

HIS : Hydraulic Institute Standards

BEE : Bureau of Energy efficiency

ANSI B 16.5 : Pipe Flanges and Flanged Fittings

JIS 8622 : Japanese Standard for Vapour Absorption Machine

4.2.2 Jacob’s standards and specifications:

As listed in “Technical requisition – List of attachments” shall be followed.

4.3 In case of conflict between this specification and other attached specifications, in general themost stringent requirements shall govern. For resolving following may be considered asprecedence order:

- Data sheet

- P&I diagram

- Job Specification

- Engineering design basis

- Standard Specification

- Codes and standards






However, all conflicts shall be referred to Consultant / Owner for clarification, before

manufacture begins and the decision of Consultant/ Owner shall be final and binding on thebidder without any cost and delivery implications.

5.0 BASIS OF DESIGN

5.1 The attached Job specification, standard specifications, datasheets and drawings shall formthe basis of design.

5.2 GENERAL

The Air-conditioning system shall comprise of the following major components:a) Air Handling Unitsb) Ventilation Fans/ Exhaust Fansc) Humidifier, Dehumidifier

d) Supply and Return Air Ductinge) Vapor absorption chillers (For Sub-station) & Air Handling Units with Direct

Expansion Coils having air cooled condensers (for Control room)f) Chilled Water Pumpsg) Chilled Water Pipingh) Cooling tower for substationi) Cooling water circulation pumps for substation j) Instrumentation and Control Systemk) Electrical Accessoriesl) Utility Piping within Battery Limits

5.3 OUTDOOR CONDITIONS:

The following table gives the outdoor temperature and humidity levels to be considered for

design of the system:SUMMER MONSOON WINTER

DB TEMP (0C) 35 29.4 18.3

WB TEMP (0C) 28.3 27.8 14.4

RH (%) 60 88 65

The AIR-CONDITIONING equipments shall be selected for maximum conditions.

5.4 INDOOR CONDITIONS:

Dry bulb temperature: For Switchgear Room: 270C and for Others : 23

0C

Relative humidity: 50 %

Tolerance shall be ± 1 0C on temperature and ± 5% on relative humidity.

The room temperatures shall be individually controlled wherever applicable.

Relative humidity however, shall not be individually controlled, but control shall be on anaverage basis, by sensing the common return air relative humidity, which will then cause theadjustment of the common supply air moisture content.




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5.5 Internal loads:

5.5.1 Temperature, humidity, noise levels, pressurization levels, air changes required in thevarious rooms/ areas are as indicated in the table below:

Electrical load(KW)

Occupancy (No) System Type of unit

DHT - Main substation (Refer Dwg No: 44LK-5100-718/A.01/0601 & 44LK-5100-718/A.01/0602):

GROUND FLOORVFD room 140 - Air-conditioning* AHU (2W+1S)

each of 50%capacity

FIRST FLOORSwitchgearroom

194 4 Air-conditioning* AHU (3W+1S)each of 33%capacity

THIRD FLOORElectricalsupervisor room

0.02 2 Air-conditioning*

VFD room 84 3 Air-conditioning*

MMI room 0.06 2 Air-conditioning*

AHU (1W+1S)each 100%capacity

DHT – CONTROL ROOM (Refer Dwg No: 44LK-5100-000/J.01/0031):Rack room 75 - Air-conditioning*

Shift in-charge& Console room

10.5 1 person/ 10 m2 Air-conditioning*

UPS room 31 - Air-conditioning*

AHU (2W+1S)each 50%capacity

* Pressure within rooms to be Air-conditioned shall be maintained at min 5 Pa aboveambient pressure.

5.5.2 Following criteria has been utilized in preliminary calculations which must be verified duringdetailed design any changes shall be approved by Consultant/ Purchaser:

Lighting load : 15 watt/ m2

U value for Walls : 0.6 W/ m2

U value for Roof : 0.35 W/ m2

5.6 Air-conditioning is required 24 hours/ day. Plant shall be suitable for maintaining insidedesign conditions all round the year. All equipments shall be suitable for 8000 hrs per year.

5.7 The refrigerant shall be used shall be ozone friendly unless otherwise specified or approvedby purchaser.

5.8 The attached architectural drawings give orientation, size of rooms, type of walls, location,size and construction details of windows, presence of false ceiling or false flooring etc.

Locations of high and low side equipment, piping terminal points and tentative duct routingshall be as indicated in the layout drawings, attached herewith.






5.9 System description:

For Main sub-station:Water cooled Vapor absorption chiller (1W+1S) shall be provided along with cooling tower(1W+1S), Cooling water & Chilled water transfer pumps (2W+1S), Air handling units etcMP steam shall be made available for chiller. For MP steam conditions refer “Basicengineering design basis”.

For Control room:Air Handling Units (AHU) (2W + 1S) each of 50% capacity with Direct Expansion typeCooling Coils and Electric Heating, Humidification & De-Humidification arrangements.3 nos. compressors shall be provided along with condensers and expansion devices (1 no.compressor for each AHU).Air Cooled Condenser Units of these AHUs shall be located within the AHU & AC plantroom. Necessary Ventilation required for Air Cooled Condensers shall be provided by HVACvendor. If the space in the AC plant room is not adequate for locating the Air CooledCondensers, only condensers may be kept out side the Control room with prior permission

from Purchaser. All other equipments shall be located within the AC plant room only.

5.10 PRPOSED AIR-CONDITIONING SYSTEM DESCRIPTION:

5.10.1 DHT – MAIN SUBSTATION

For the areas/ rooms to be catered by AHU-s, dehumidified/ humidified and filtered air shallbe ducted from the AHU to various points in the room/ area through diffusers/ grilles afterrequired degree of filtration has been achieved. Depending on the internal conditions andlocations, rooms/ areas shall be combined (as indicated in clause no 5.5.1) and servedthrough a common AHU. Return air after filtration shall be ducted from the room and re-circulated through the AHU. Fresh air shall be mixed with the return air and exhaust air shallbe vented to atmosphere in the mixing section of the AHU. Quantity of exhaust air shall be

determined according to the quantities of fresh and return air, and controlled through anautomatic damper. The exhaust air is to be vented to atmosphere through a duct at asufficient height above the fresh air inlet so that the two air streams do not mix.

AHU-s shall be supplied with chilled water as required. Reheating of air shall be done byelectric heaters. In case the air needs to be humidified and a dedicated humidifier is notenvisaged, the AHU shall have water spray arrangement. This will use process water orcooling water as specified in BEDB.

Chilled water shall be generated in the Vapour Absorption Chiller (1W+1S) and circulated bychilled water supply pumps (2W+1S). Return chilled water shall be taken back to the chillerby chilled water re-circulation pumps (2W+1S) or for return water circulation same chillerwater supply pumps can also be used for this purpose.

Water from Cooling Tower (1W+1S) shall be circulated through chilller, by using coolingwater circulation pumps (2W+1S). Cooling Tower Make up water shall be provided bypurchaser up to battery limit (B/L), further subsequent piping (along with pipe rack) shall becarried out by the vendor. Cooling tower shall be located on roof of substation.

Condensate collection tank and transfer pump shall be provided. Location and Pressurerequired at outlet of condensate transfer pump shall be furnished (by Purchaser) duringdetailed engineering.




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Locations of high and low side equipment are given in the layout drawings attachedherewith. For better clarity, Location of some of the equipments are listed below:

a) Chillers(1W+1S) and Chilled water circulation pumps (2W+1S) shall be located onGround floor

b)AHU (2W+1S) for air conditioning of VFD room (Ground Floor) shall be located onfirst floor.

c)Cooling tower (1W+1S) shall be located on roof of substation and Cooling watercirculation pumps (2W+1S) shall be located suitably.

d) Piping shall be routed through vacant bay (indicated in drawing)

5.10.2 DHT – CONTROL ROOM

AHUs and associated air cooled condensers shall be located on Ground floor (in AHU & ACPlant Room).

6.0 GENERAL REQUIREMENT

6.1 Various components like AHU-s, chillers, pumps, cooling tower, fans, air-conditioning unit,ducting, piping etc., wherever required, are to be manufactured according to the respectivespecifications for these units, attached along with this requisition.

6.2 Chillers:

Chillers shall have step less turndown from 10 to 100 % for VAC and VCC.

Capacity: 10% additional than calculated.

MP steam shall be considered for VAC, pressure at battery limit shall be as per BDEB. For

detailed steam conditions refer attached Basic engineering design basis (BEDB). If any

PRDS is required same shall be in vendor’s scope. Pressure, temperature gauges and

transmitters shall be provided on steam line with indication in control panel and DCS.

For chillers, vendor shall indicate the utilities consumption on full load and at part load

operation.

Each VAC shall have individual condensate recovery system which shall include necessary

steam trap , high / low level switches , level indicator , Common condensate Tank for 1

Working + 1 Standby configuration of VAC and 02 Nos(1W + 1S) electric motor driven

condensate transfer pump.

Steam piping shall be IBR. IBR approval shall be in Vendor’s scope

6.3 DEHUMIDIFIERS:For low humidity applications the vendor shall provide dehumidifiers in addition to AHU-s. Thedehumidifiers shall preferably be located downstream of the AHU-s to reduce the moist air loadon the dehumidifier. Interconnecting ducting between the AHU, dehumidifier and the room orarea to which the air is being supplied is to be part of the vendor’s scope of supply

The de-humidifier shall preferably be desiccant type, with a rotating bed having absorbent andregeneration sections. Desiccant bed shall be heated by electric heaters. Operation of theelectric heaters shall similarly be controlled by thermostats. These shall be interlocked with theoutlet conditions of the air leaving the dehumidifier. Vendor shall furnish power requirement of






drive motors and electric heaters.

Regeneration shall be carried out by ambient air through a regeneration fan. The hot air afterregeneration shall be vented to atmosphere at sufficient height or distance to ensure that itdoes not mix with the inlet air.

To prevent increase in temperature of the air to be supplied to the room, part of the outlet airfrom AHU shall be preferably be by-passed around the dehumidifier and mixed with the outletair from the dehumidifier. The amount of by-pass air is to be controlled by a by-pass damper.The vendor may also consider addition of fresh air after the dehumidifier for this purpose.Condition of air at the outlet of AHU is to be adjusted accordingly.

Temperature indicators along with high temperature alarms shall be provided for the desiccantbed and outlet air.

The dehumidifier along with accessories shall be skid-mounted. Vendor shall supply thecomplete unit with insulation, support structures, holding down bolts etc.

The vendor may offer other type of dehumidifier if it is operationally better and more costeffective than the desiccant type

6.4 Ventilation fans shall be suitable for outdoor application.

6.5 REQUIREMENTS FOR PIPING

6.5.1 The vendor shall provide:

a) Complete refrigerant piping for the chillers etc

b) Chilled water supply and return piping between the chillers and the AHU-s

c) Cooling water piping between chillers, cooling tower, pumps and humidifiers etc

d)Steam piping from terminal points to chiller, necessary PRDS shall be in vendor’sscope.

e) Condensate piping upto battery limit point (at 8 kg/ cm2 G at battery limit point)

6.5.2 For piping battery limits refer drawing “Proposed location for main substation cooling tower (&piping terminal points) (Dwg No: 44LK-5100-718/L.01/0002)”

6.5.3 Refrigerant piping:

Refrigerant piping shall be of seamless carbon steel. Liquid lines exposed to sunlight shall beinsulated. Suction lines should also be insulated to prevent dripping. Insulation shall bewaterproof and vapour-proof.

For welds, 10% random radiography is to be performed.

All piping network shall be leak tested by soap water solution followed by halide torch leakdetection. Piping network shall be further pressure tested for minimum 24 hours. Afterestablishing capability to withstand test pressure, piping network shall be dried if necessary andvaccumised. Vacuum test shall be for a minimum of 24 hrs before charging refrigerant.

6.5.4 Water piping: All water piping shall conform to the attached standard piping specifications.




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6.5.5 Piping, valves and fittings shall conform to the attached standard piping specifications.

6.6 FIRE DAMPERS

To restrict fire spread through ducts, dampers shall be installed in ducts, where they pierce

firewalls or at the point the ducts emerge from air-conditioning plant room. These dampers

must have 90 minutes fire rating (resistance) and may be if single blade/ multi blade design,

pneumatically operated and actuated by smoke/automatic detector units. Instruments air

shall be made available at one point, further distribution by vendor.

With operation of the automatic detector (Smoke, Hydrocarbon and Toxic Gas) within the air

duct the supply and return air ducts must be cut off and the air-conditioning plant tripped.

This could be achieved by electrically interlocking the detector(s) with the duct dampers and

the air-conditioning plant system.

Fire Dampers shall be provided in supply air and return air paths. Fire dampers shall be

CBRI certified.

Fire Dampers shall be selected for maximum face velocity limited to 1500 fpm when these

are installed at main supply air ducts and 1000 fpm when installed at return air

paths/openings.

Fire Dampers installed in supply and return paths/ducts shall be selected for maximum face

velocity corresponding to the duct velocities specified in the tender.

6.7 PLANT ROOM VENTILATION

A.C. plant room shall be force ventilated by wall mounted exhaust fans complete with electricmotor, louver shutter and galvanised expanded wire protection guard on intake side of exhaustfan.

Capacity shall be decided based on minimum 20 air changes per hour (or as required for theair cooled condensers for control room).

Air intake weather protection louvers along with bird protection screen shall be provided withsuitable structural steel frame in wall.

6.8 FILTERS

Vendor shall provide Chemical Filter for Fresh Air (chemical filter only for Control Room)

along with Fresh Air Supply Fan with standby fan. The Chemical Filters and Fresh Air supply

Fans shall be kept as indicated in layout. 1.5 ACPH (Air changes per hour).

Two-stage air filtration shall be provided. In 1st stage pre-filters shall be provided at AHU,

which shall have minimum 80% efficiency upto 20 microns. Filters shall be mounted in a

suitable G.I.Plenum. Filter shall be HDPE washable type.






Chemical Filters are to be designed for ISA class G1 outlet conditions. Performance test for

chemical filters shall be done at site.

Filter shall be selected for a pressure drop of 6.5 mm wg maximum when clean.

Chemical filter shall be selected for the chemical life of minimum one year. Following

conditions shall be considered as a minimum while selecting filter.

Outside Air Condition Inside Air Condition

(Input Yearly Average µg/cm3)

SO2 100 Less than 0.05 ppm by volume

NOx 100 Less than 0.05 ppm NO2 by volume

H2S Traces Less than 0.01 PPM

NH3 Traces Less than 0.1 PPM

SPM 400 Less than 100 mg/ Nm3

Cl2 Traces Less than 0.001 PPM by volume.

One random filter shall be performance tested at site/manufacturers’ works as per BS EN

779/BS-6540. However, type test certificates for all filters shall be furnished.

Filters shall be suitable for mounting in carbon steel framework suitable for bolting with

grouting frame.

All filters shall be capable of being cleaned completely of their accumulated dust by flushing

with tap water or by compressed air backwash.

6.9 Pipe line sizing criteria and other requirements:

Suction line fluid velocity shall not exceed 1m/s.

The velocity in discharge side shall be between 1.22m/s and 2.2m/s.

Steam line sizing criteria: pressure drop shall be restricted to 0.15 kg/cm2 per 100 meters

Drains and vents shall be provided at suitable place. Minimum line size for drain or vent shall

be 1”. Valve with blind flange to be provided for all drains and vents.

6.10 Air intakes shall be located in non-hazardous and chemical fume-free areas at adequate

elevation to protect against rains and dust at least 8M above ground level.

6.11 INSULATION

6.11.1 The surfaces to be insulated shall be thoroughly cleaned and allowed to dry.Pressure/hydraulic test, if any, shall be carried out before insulation.

6.11.2 Hot Insulation:

Bare surfaces of pipe/equipment shall be provided with one coat of 20 micron min (dry film

thickness) heat resistant aluminum paint up to 125ºC, the surface shall be wrapped with

0.19mm thick aluminum foil before application of insulation material.




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Resin bonded mineral wool conforming to IS-3183 shall be used for hot insulation.

Preformed pipe sections/mattresses of min. density 120 kg/m3 shall be used.

Hot insulation shall be cladded with 26 SWG aluminum sheeting up to 14” dia for preformedpipe sections and 24 SWG aluminum sheeting above 14” dia pipes, equipment etc.

6.11.3 Cold Insulation:

Sound attenuators shall be installed in ducts as applicable.

For all inspection covers and hatches on equipments, pump casing, valve bodies & flangesmore than 100 mm dia, insulation shall be applied so as to facilitate removal withoutdamage. This shall be achieved by encasing insulation in 24 gauge aluminium sheet metalsections which are bolted together around equipments to permit easy removal andreplacement maintaining continuity of vapour seal.

6.11.4 The insulation material shall be as follows:

- Resin bonded fiber-glass of Minimum 48 kg/m3 density to IS: 8183.

- Poly isocynurette of 32 kg/m3 density to IS: 12436.

- Phenolic. Foam of 32 kg/m3 density to IS: 13204.

- Polyurethane Foam of 32 kg/m3 density to IS-12436.

6.11.5 The application, insulation material and recommended thickness shall be as follows:

Application Insulation Material Form Thickness(mm)

Supply/ Return air duct Resin bondedFibre-glass

Slab/Roll 25

Outdoor Exposedsupply/ return duct

-Do- -Do- 40

Refrigeration Piping Polyurethane or,Phenolic Foam or,Polyisocynurene

Pipe Section 50

Chiller -Do- Slab 60Chilled water pumps -Do- Slab 40Expansion tank & Associatedpiping

-Do- Slab 30

Chilled water piping, valvesspecialties

-Do- Pipe section 40

AHU Drain pipe -Do- Pipe section 15AHU Drain pan, coil & blowersection

-Do- Slab 15

Acoustic treatment Resin bonded fibreGlass

Slab/ Roll 25

Pan Humidifier -Do- Slab 50Hot Water / Steam piping -Do- Pipe Section/

Roll60

6.12 COOLING TOWER

Cooling tower shall be induced draft type in FRP construction suitable for outdoorinstallation.






At rated flow, Cooling tower shall be designed for inlet water temperature as 39 deg C andoutlet water temperature 32 deg C.

The distribution system shall operate satisfactorily at one half the design water circulationrate and also be designed to operate under at least 1.25 times the design water circulationrate without excessive head loss or overflow of the water distribution basin.

Cooling tower fan shall be of hollow FRP with aero foil section blades directly mounted onshaft of totally enclosed weather-proof motor. The fan shall be protected by guard. Fanimpeller shall be dynamically balanced.

Suitable lifting arrangement shall be provided on top of the fan deck for the removal of gear

assembly and fan from the stack, for maintenance or repairs. Access platform with hand

railing shall be provided through the fan stack for removing gearbox from deck upto ground

level shall be provided.

Service ladder shall be provided for cooling tower.

Water basin shall be made of FRP and provided with suction strainer.

Cooling tower shall be provided with drift eliminator.

Supporting frame work for cooling tower shall be made of galvanised steel except the steelgirders on foundation block (same shall be in vendor’s scope).

Local lockable stop push button station in weather-proof enclosure with canopy cover shallbe provided.

Isolation valves must be provided on cooling tower inlet/outlet lines to isolate the coolingtower for maintenance.

Vendor shall provided cooling water dosing system along with dosing chemicals (required

for 1 month).

6.13 WATER PUMPS

Pump shall be back pull-out type upto 5.5 KW rating and axial split casing type for 7.5 kWand above rating.

7.5 kW and above rated pump shall be normally selected for operation at 1450 rpm.

Pump shall be complete with drive motor, coupling with non-sparking guard, common baseplate, fixing and hold down bolts.

Pump suction / discharge flanges shall be drilled to ANSI B16.5 standard.

6.14 ELECTRICAL

All AHU-s, dehumidifiers, packaged units, split units, ventilation and exhaust fans shall beconnected to one or more common MCC-s depending on their locations. Similarly all high




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side equipment (chillers and pumps) shall be connected to a common MCC. All these MCC-s will be supplied by the vendor. The purchaser will supply power up to the vendor’s MCC-s.

All power and control cabling from the MCC-s to the respective drives shall be supplied andinstalled by the vendor. Voltage required for control application shall be derived by vendor.

All fans shall have local start-stop push-button stations.

All drive motors shall be supplied by the vendor.

All electrical equipment shall be provided with two external earth terminals and shall beconnected to earth by two separate wires of suitable size.

Technical requirement for the motors are given in the attached data sheets andspecifications. General requirements of electrical components of packaged systems are alsogiven.

For electrical scope and technical requirement refer “Technical Specification for ElectricalEquipment in HVAC Package”.

6.15 CONTROL PHILOSOPHY

Vendor shall include all controls required for safety and operation requirement of plant.

Operation of plant shall be automatic, but provision shall be made for manual operation.

For substation Air conditioning system, the high side equipment comprising of Chillers, ChilledWater pumps, Cooling Tower, Cooling Tower Pumps and other equipments shall have adedicated control panel having interface with the purchaser’s main control panel in the plant.The control panel shall be PLC-based. Local control stations shall be provided for equipmentlocated away from the plant room.

Among the low side equipment, all AHUs, Fresh Air Chemical Filter shall have commonautomatic control panel. Separate local control stations shall be provided for these equipments.

Package units shall be provided with integral control panel.

For control room air conditioning system, each AHU-Compressor-Condenser set shall havea automatic control panel. Package units shall be provided with integral control panel.

All controls shall be suitable interlocked for safe and sequential operation of plant.

Vendor to furnish P&I Diagrams indicating offered instrumentation.

Purchaser shall supply control power supply and instrument air at one point. Further cablingand instrument air piping shall be carried out by the vendor.

Potential free contact shall be provided by vendor for closing fire dampers andsimultaneously tripping AHU blower motor on receiving fire signal from purchaser’s Fire andGas panel. On expiry of fire signal, fire dampers shall open automatically for pneumatic typeand manually through reset button for electric motorized type.

The controls/indicators (such as running status of the equipments, fire dampers, systemtemperatures, etc) which are required to be connected to remote control room (DCS) shall






be terminated in a junction box (with terminal strip) or local panel (located at the edge ofskid) as applicable. All signals shall be made available for incorporation in the plant DCS.

PLC based Control Panel shall be provided without redundancy.

LOCAL CONTROL PANEL (LCP)

Control Panel for the air conditioning plants shall be located in the respective AC plantrooms, Audio-visual annunciation shall be incorporated in the control panel for all drives andoperational parameters.

All local control panels shall have running indications for drives, indications/ alarms and acommon fault signal (to be repeated in purchaser’s control panel) start/ stop push buttonswith lockable facility indication lamps, ammeters and indicators for all drives. If the motorcontrol centres are not located in the AC plant, detailed design requirement for all thecomponents shall be as per relevant Elect. Interconnection between LCP and M.C.C./sitemounted equipment shall be under Vendor's scope. Signal from panel can be taken to DCSfor knowing status, Panel shall able to receive signal as in case of fire or other reason tostop plant.

The Control panel shall contain at-least the following control elements for the automaticoperation of refrigeration unit.

a) Compressor capacity control device

b) Start/stop push button station for the machine.

c)Automatic temperature controller for chilled water temperature. Chilledwater temp controller shall be of PID type

d) Start/stop push button station for chilled water pumps.

e) Operation indicating pilot lamps.

f) All safety devices and operational control elements wired to control panel.

The instruments for following measurements shall be provided in each plant as applicable:

a) Condenser cooling water outlet and inlet temperatures.

b) Condenser inlet and outlet water pressures.

c) Chilled water inlet and outlet temperature and pressure.

d) Water flow measurement in each condenser. This unit shall be a permanentinstallation in the line.

e) Any other instrument not mentioned herein but found essential for safe and trouble

free operation of the plant shall be provided.

f) All pressure gauges shall have isolating valves and shall be provided with gaugesaver.

g) Step less Capacity control of refrigeration plant

For Vapor absorption chiller, as a minimum, following additional safety features shall beincorporated:




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Sr.No.

Condition Alarm Trip Preventive ActionAutomatic

1. High temperature in refrigerant in generator Yes Yes Stem flow stops

2. High vapor pressure in generator. Yes Yes Steam flow stops

3. Chilled water flow below minimum condition50% (vendor to confirm)

Yes Yes Steam flow and allpumps stops

4. Absorbent / Refrigerant motors overcurrent. Yes Yes Pump stops

5. Absorbent pump thermal cut-out Yes Yes Pump stops

6. Purge pump overload relay. Yes Yes Pump stops

7. Dilution cycle Yes - -

8. Total shutdown Yes - Steam flow and allpumps stops

9. Chilled water DP Switch Yes Yes Steam flow and allpumps stops

10. Low refrigerant temperature Yes Yes Steam flow and allpumps stops11. Cooling water low temperature switch. Yes Yes Steam flow and all

pumps stops

The entire control panel shall be factory wired. The panel will be functionally field tested

Flow meters in chilled water and condenser water lines and Pressure Gauges in inletand outlet of cooling water and chilled water shall be provided locally.

All electric motor driven equipments shall be provided with local Start/Stop Push buttonstations for operational and statutory requirements. Stop push button shall be lockabletype.

Vendor shall provide thermowell in refrigerant circuit so as to enable to take readingsfor temp, of refrigerant at various places of the circuit during performance testing. Exactlocations shall however, be f inalised by Purchaser/ Vendor mutually during drawing approvalstage.

Calibration of all instruments shall be done by vendor.

Pressures gauges shall be provided with bleed and block valves.

Potential free contact shall be provided in control panel for duplication of alarm inPurchaser's main panel. The necessary wiring from this contact shall be done by

purchaser.

Annunciator panel with appropriate function in block letters for each alarm point shall beprovided. Three push buttons for audible alarm acknowledge, reset and test with appropriatename plates shall be provided common to all alarm points. Annunciators shall be providedfor all faults covering at least the following:-

a) Low oil pressure.

b) Low chilled water flow.






c) Low condenser cooling water flow/No airflow on condenser.

d) Low chilled water temp.

e) Low evaporator pressure.f) High condenser pressure.

g) Compressor motor overload.

h) Chilled water pump motor over load.

i) Condenser cooling water pump, motor over load.

j) Crankcase heater.

k) Any other as necessary.

l) Spare window 20%.

In the event of a fault, the particular window shall glow and the window will remain lighted tillthe fault is rectified.

For each room / area to be air-conditioned, Dry bulb temperature indicator, relative humidityindicator and differential pressure (manometer) indicator shall be provided

6.16 Vendor shall furnish tentative duct routing (single line diagram) for the package units.

Vendor shall also furnish the sizes and locations of the openings required slabs, walls etc.

for the duct routing.

6.17 PAINTING

Painting shall be as per painting specification.

7.0 VENDORS SCOPE OF WORK

7.1 Vendor’s scope shall include design, engineering, manufacturing, inspection, testing, packing

and forwarding, supply at site, erection and commissioning, proving mechanical and

performance guarantee (including performance testing at site) of complete Air-conditioningsystem separate for Control room and Main Substation:

7.2 Vendor shall complete the entire ducting work of DHT – Control Room within 45 days of LOI /

FOA. Commercial document in the tender shall be referred to for bonus / penalty clauses.

7.3 Air-conditioning system for Control room shall consist of:

I. Air Handling Units (AHU) (2W + 1S) with Direct Expansion type Cooling Coils andElectric Heating, Humidification & De-Humidification arrangements, refrigerantcompressors (3 nos.), condensers (3 nos.), refrigerant piping etc.

II. Air-handling units in modular construction, each complete with coil section, heatersection, fan section, filter section, dampers, skid, holding down bolts etc

III. Ventilation fans with drive motor, drive accessories, base frame, foundation bolts etc.IV. Wall mounted exhaust fans.

V. Ventilation Fans for HVAC and Pressurisation Equipment Room.

VI. Dehumidifier with desiccant bed, heaters, regeneration fan, drive arrangement etc.

VII. Supply and return air ducting between AHU/ other air-conditioning units/ ventilationfans and respective room/areas, with all dampers, fire dampers, diffusers, grills,supply and return air filters, sound attenuators, duct heaters, duct supports etc.

VIII. Utility piping (cooling water, hot water, plant water etc.) to and from purchaser’s




44LK-5100 Doc.No: 44LK-5100-718/M.02/0029/A4 of 26


headers/ terminal points. Pipe rack with piping supports, from battery limit toconsumer point.

IX. Isolation valves and Mating flanges at terminal points.X. Electrical components including all drive motors, starters, drive accessories, MCCs,

local push-button stations, plant earthing, cabling between MCC/PBS and respectivedrives etc.

XI. Local control panels for high side and low side equipment, along with control cablingand instrument air piping between panels and field instruments.

XII. Instrumentation, Cabling along with required supports.

XIII. Instruments required for performance test

XIV. First fill of all consumables (lubricants, refrigerants) till satisfactory performance test.Dosing chemicals (for 1 year normal operation)

XV. All foundation / holding down bolts.

XVI. All insulation work (hot and cold).

XVII. All structural items, supports, platforms, ladders, walkways etc. required forcontinuous operation of the plant.

XVIII. Inspection and testing

XIX. Packing, forwarding and supply to site.

XX. Erection, commissioning, performance tests and performance guarantees (includingperformance testing at site).

XXI. Spares for two years’ normal operation(Separate quote)

XXII. Drawings and documents as specified.

XXIII. All special tools, tackles and consumables required for erection and commissioning.

XXIV. Vibration isolators

XXV. Shed/Canopys for all the equipments/ items installed in outdoor locations

XXVI. Painting

XXVII. Tool and tackles, consumables required during erection commissioning & hand over.

XXVIII. Temporary support as required for False ceiling related cut-outs, repairs andmodifications wherever applicable.

XXIX. Training of purchaser’s operators and maintenance personnel.

XXX. Smoke, Toxic gas and Hydrocarbon detectors shall be vendor scope of supplywherever applicable.

XXXI. Necessary sealing or caulking material for cut-outs/openings shall be in HVAC,

Pressurisation & Ventilation Package Vendor.

XXXII. Necessary sealing or caulking of the cut-outs / opening made for HVAC,Pressurisation & Ventilation etc. shall be done by HVAC, Pressurisation & VentilationPackage Vendor.

XXXIII. Designing of foundations/pedestals for HVAC, Pressurisation & Ventilation PackageEquipments etc. shall be done by HVAC, Pressurisation & Ventilation PackageVendor.






XXXIV. Supply and grouting of supports/support structure for ducts/cables/pipes etc.including supply of grouting materials shall be done by HVAC, Pressurisation &Ventilation Package Vendor.

XXXV. Supply, routing and laying of cables shall be done by HVAC, Pressurisation &

Ventilation Package Vendor.

XXXVI. If cables are crossing the wall then cables shall be routed through pipe sleeve. In this

cables and associated pipe sleeves shall be supplied by HVAC, Pressurisation &


XXXVII. Providing and fixing of framework for SA grills / diffuses, intake/exhaust air

arrangement and relief dampers (as required) shall be done by HVAC, Pressurisation

& Ventilation Package Vendor.

7.4 Air-conditioning system for Main-substaton shall consist of:

I. (1W+1S) Vapour absorption chiller (for Main-substaton) each complete with

evaporator, absorber, condenser, generator with absorbent and refrigerant pumps,purge recovery device, decrystalization system, refrigerant piping, drive unit, commonskid, foundation bolts, instrumentation etc.

II. Chilled water pumps (supply and return) (2W+1S) complete with drive arrangement,motor, common base frame, foundation bolts etc.

III. Cooling Tower (1W +1S), Cooling water transfer (2W+1S) and Chemical dosingsystem.

IV. Chilled water supply and return piping, with all valves and fittings, between the chillerand the AHU-s.

V. Expansion Tank as applicable.

VI. Air-handling units in modular construction, each complete with coil section, heatersection, fan section, filter section, dampers, skid, holding down bolts etc

VII. Ventilation fans with drive motor, drive accessories, base frame, foundation bolts etc.

VIII. Wall mounted exhaust fans.

IX. Ventilation Fans for HVAC and Pressurisation Equipment Room.

X. Dehumidifier with desiccant bed, heaters, regeneration fan, drive arrangement etc.

XI. Supply and return air ducting between AHU/ other air-conditioning units/ ventilationfans and respective room/areas, with all dampers, fire dampers, diffusers, grills,supply and return air filters, sound attenuators, duct heaters, duct supports etc.

XII. Condensate recovery system shall consist of:

• Condensate transfer pump with drive motor (Pump discharge pressure andrequired flow rate shall be informed during detailed engineering)

• Interconnecting piping from VAM to Steam condensate tank, Tank to pump

and pump to pipe rack with isolation valves, strainers etc.• Steam condensate tank/drum of minimum 1 hr hold up capacity.

XIII. Utility piping (cooling water, hot water, plant water, steam etc) to and frompurchaser’s headers/ terminal points. PRDS on steam line and control valve oncooling water make up line. Pipe rack with piping supports, from battery limit toconsumer point.

XIV. Isolation valves and Mating flanges at terminal points.

XV. Electrical components including all drive motors, starters, drive accessories, MCCs,local push-button stations, plant earthing, cabling between MCC/PBS and respective




44LK-5100 Doc.No: 44LK-5100-718/M.02/0029/A4 of 26


drives etc.

XVI. Local control panels for high side and low side equipment, along with control cablingand instrument air piping between panels and field instruments.

XVII. Instrumentation, Cabling along with required supports.

XVIII. Instruments required for performance test

XIX. First fill of all consumables (lubricants, refrigerants, charge of absorbent) tillsatisfactory performance test. Dosing chemicals (for 1 year normal operation)

XX. All foundation / holding down bolts.

XXI. All insulation work (hot and cold).

XXII. All structural items, supports, platforms, ladders, walkways etc. required forcontinuous operation of the plant.

XXIII. Inspection and testing

XXIV. Packing, forwarding and supply to site.

XXV. Erection, commissioning, performance tests and performance guarantees (includingperformance testing at site).

XXVI. Spares for two years’ normal operation(Separate quote)

XXVII. Drawings and documents as specified.

XXVIII. All special tools, tackles and consumables required for erection and commissioning.

XXIX. Vibration isolators

XXX. Shed/Canopys for all the equipments/ items installed in outdoor locations

XXXI. Painting

XXXII. Commissioning & mandatory spares.XXXIII. Tool and tackles, consumables required during erection commissioning & hand over.

XXXIV. Temporary support as required and False ceiling releated cut-outs, repairs andmodifications wherever applicable.

XXXV. Training of purchaser’s operators and maintenance personnel.

XXXVI. Split air-conditioning units with compressors, condensing units, fans, filters etc

XXXVII. Smoke, Toxic gas and Hydrocarbon detectors shall be vendor scope of supplywherever applicable.

XXXVIII. Necessary sealing or caulking material for cut-outs/openings shall be in HVAC,Pressurisation & Ventilation Package Vendor.

XXXIX. Necessary sealing or caulking of the cut-outs / opening made for HVAC,

Pressurisation & Ventilation etc. shall be done by HVAC, Pressurisation & VentilationPackage Vendor.

XL. Supply, routing and laying of cables shall be done by HVAC, Pressurisation &


XLI. If cables are crossing the wall then cables shall be routed through pipe sleeve. In this

cables and associated pipe sleeves shall be supplied by HVAC, Pressurisation &


XLII. Providing and fixing of framework for SA grills / diffuses, intake/exhaust air

arrangement and relief dampers (as required) shall be done by HVAC, Pressurisation






& Ventilation Package Vendor.

7.5 Air cooled package air conditioners along with humidifier, de-humidifier, ducts, fittings/supports, cabling piping and insulation:

I. For Control room and VFD room, 2 no each of capacity 30 TR.II. For UPS room, 1 no capacity 15 TR.

7.6 Electrical

For detailed Electrical Scope of work pls. refer to attached “Electrical Technical specification

along with Annexures”

7.7 Termination Points/ Battery limits shall be as listed below:

Service Vendors’ Scope of work Purchaser’s Scope of work

Steam piping From one point on pipe rack At one point on pipe rack.

Condensate piping Up to Purchaser’s pipe rack At one point on pipe rack.

Make-up water for

cooling tower piping

From one point on pipe rack At one point on pipe rack.

Instrument and service

air piping/ tubing


DM water/ Drinking

water piping


Instrument cabling For vendor supplied panels, all

interconnecting cabling. -

Instrument cabling For other instruments cabling upto

junction box (signals taken to otheruse) along with junction box.

From junction box onwards

Electrical wiring From MCC further distribution as

required.

Upto vendor’s MCC

8.0 PURCHASER’S SCOPE OF WORK

8.1 All Civil works including foundation and grouting work (based on vendor’s load data). All

foundation shall be terminated at 100.3 meter (considering FGL as 100 meter).

8.2 Provide cutouts in walls & slabs

8.3 Supply of all utilities at one common point on the pipe rack as indicated.

8.4 For detailed Electrical Scope of work refer to attached “Technical Specification for Electrical

Equipment in HVAC Package along with Annexures”




44LK-5100 Doc.No: 44LK-5100-718/M.02/0029/A4 of 26


9.0 QUALITY ASSURANCE AND QUALITY CONTROL

All inspections and tests shall be carried out as per the agreed vendor quality control plans.

Deviations / concessions to the requirements of various specifications, after placement of

order, shall not be accepted without approval from Purchaser/ Consultant. Vendor shall

apply for the deviation / concession, if any, strictly as per the attached Concession Request

form.

The Owner reserves the right to inspect any machinery, material and equipment furnished or

used by the vendor under the contract and may reject which is defective in workmanship or

design or otherwise unsuitable for the use and the purpose intended or which is not in

accordance with the intent of the contract. The vendor shall on demand by the Purchaser,

remedy or replace at the vendor’s expense any such defective or unsuitable component/

item/ equipment.

Necessary copies of materials test certificates and inspection/fabrication certificates shall be

supplied for all items/ equipment. Actual performance test certificates shall also be

submitted.

The Purchaser reserves the right to verify test certificates of critical parts before machining

followed by stage inspection during manufacturing.

10.0 INSPECTION & TESTING

10.1 Vendor shall furnish a detailed QA/QC plan, which will include inspection criteria for all

components. This plan, approved by the purchaser, shall follow the basis of inspection.

10.2 Performance testing:

Performance test of chiller package shall be given at works conforming to ARI-550 for rotary

chilling package, ARI-590 for reciprocating chilling package, ARI-560 for vapour absorption

chiller. The facility for generating the artificial load for conducting the performance test shall

be available with the vendor. Vendor shall furnish full procedure for conducting performance

test for purchaser’s review before carrying out the actual test. The date of test shall be

mutually agreed between purchaser and vendor.

After erection, the vendor shall carry out start-up, stabilization and commissioning of the

plant. As a minimum following performance parameters shall be tested and guaranteed

during this stage in presence of purchaser’s representatives. After commissioning of plant,

Test run period shall be 10 days during which the vendor’s personnel shall record & monitor

the parameter on a daily basis:

a) Air flow rates at various points e.g. supply from AHU and dehumidifier, return fromrooms, by-pass air etc

b) Air pressure drop through ducts

c) Fan static and total pressures






d) Room conditions such as temperature, pressure, humidity etc.

e) Filtration efficiencies

f) Refrigeration capacity of the unit

g) Noise levels and vibrations

h) Utility consumption figures

System shall be considered as commissioned, Only after the satisfactory test run.

11.0 GUARANTEE

11.1 Mechanical Guarantee

Mechanical shall stand guarantee against defective materials and workmanship for the

period specified in commercial terms and conditions.

The vendor shall repair and replace parts of the equipment supplied at his own cost (noliability to consultant/ Purchaser), if found defective or unsuitable for the duty conditions

during the guarantee period.

11.2 Performance Guarantee:

11.2.1 The equipment shall be guaranteed for satisfactory performance at all operating conditions.

Period of guarantee shall be as per attached commercial terms.

11.2.2 Equipment specifications attached herewith give performance guarantee requirements for

major items. In addition to these, the vendor shall guarantee continuous and trouble-free

operation of the plant after commissioning. Specifically, the following parameters will be

guaranteed for during continuous running:

a) Refrigeration capacity of the unit with turndown

b) Chemical Filter: Constituents of air as specified above

c) Power consumption for the complete package

d) Cooling water requirement for condenser

e) Room inside conditions as specified in the basis of design.

f) Relative humidity to be maintained inside the room as specified in the design

basis.

g) Acceptable tolerance on refrigeration capacity -0% + 5%

h) Power consumption (tolerance + 3%)

i) Noise level and vibrations.

The above tolerances are exclusive of instrument tolerances.

11.2.3 If the performance test fails by reason due to vendor the next test run must be carried out

within the shortest possible time. If for reasons not imputable to vendor, Owner and vendor

shall settle mutually the terms and conditions of test run to be carried out later.




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11.2.4 If guaranteed performance is not proved, the vendor shall make necessary modification and

carryout repeat performance tests, all at his own expenses until the specified performance is

achieved with no impact on project schedule.

11.2.5 The vendor shall provide detailed OEM manuals to enable purchaser’s site personnel to

operate the plant after commissioning and stabilization.

12.0 VENDOR DATA REQUIREMENT

12.1 Vendor shall ensure that the bid furnished is complete in all respect to facilitate evaluation by

Purchaser/ consultant. Deviations, if any, taken by the vendor shall be clearly highlighted

and listed separately. Details furnished with the bid shall include but not limited to the

following:

a) System description

b) Process flow diagrams

c) P&I diagrams indicating all instruments and control loops

d) Filled-in data sheets

e) Heat load calculations for all three seasons (Summer, Monsoon and Winter) with

relevant psychometric chart specifying designed TR capacity, dehumidified air

quantity and monsoon/ winter heating capacity.

f) Dehumidifier sizing calculations

g) Duct sizing calculations

h) Preliminary equipment drawings

i) Preliminary layout and duct routing drawing

j) Pressure drop calculations for fans

k) Control philosophy

l) Inspection and testing procedures

m) List of deviations from the enquiry specifications and reasons thereof

n) Reference list of similar installations in the past

o) Catalogues/ leaflets of the products offered

12.2 Vendor shall submit drawings and documents as per attached vendor data requirement for

Purchaser’s / engineer’s review / approval.

12.3 Vendor shall also transmit electronic files of the drawings and documents at each submission.

13.0 EQUIPMENT QUALIFICATION CRITERIA FOR MAJOR BOUGHTOUT ITEMS

13.1 For Major bought out items (Chillers, compressors, AHU, Chemical filter, pumps, cooling

tower, MCC etc.):

The subvendors for all the bought out items shall be from the approved vendor list attached





A LK M A J b S ifi i Ai C di i i S d

with the tender. This subvendor for the complete unit shall be an established manufacturer

of equipment being supplied having adequate engineering, manufacturing and testing

facilities for the same. At least 2 units of the proposed model shall have been designed,manufactured, tested and supplied from the proposed manufacturing plant in the last 7

(seven) years & both of these units shall have successfully operated in the field for at least

8000 hours individually without any major overhaul as on the date of issue of invitation to

bid.

For bought out items, before placement of order, EQ shall be obtained from sub-vendors

and shall be furnished to Jacobs for verification.

a 1 44lk-5100-718m.020029a4 job specification air conditioning system

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