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TAMILNADU NEWSPRINT AND PAPERS LIMITED

Corporate office

TENDER DOCUMENT

Replacement of existing old Air Handling Units with

Supply, Installation, Testing & Commissioning of New

Double Skin AHU’s along with associated ducting,

insulation, piping, valves etc. at our Corporate office

building, Guindy, Chennai.

Tamilnadu Newsprint And Papers Limited Envac Consulting And Engineering - 1 -

TAMILNADU NEWSPRINT AND PAPERS LIMITED No.67, Mount Road, Guindy, Chennai - 600 032

Tender No. : 192013005857

Due Date : 31.01.2020

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Description of Materials

AIR HANDLING UNITS: Supply, installation, testing & commissioning of new

Double Skin AHU’s along with associated ducting, insulation, piping, valves

etc. including all allied works as specified in the Tender Document. … 01 Job. ----------------------------------------------------------------------------------------------------

Closing time and date : 3.00 PM ON 31.01.2020

Tender will be opened at : TNPL Corporate Office,Chennai

DGM (CO.HR&S)


TAMILNADU NEWSPRINT AND PAPERS LIMITED No.67, Mount Road, Guindy, Chennai - 600 032

TERMS AND CONDITIONS

1. Quotation must be submitted giving complete details: in particular, the offers should clearly

specify applicable taxes, make offered, warranty / guarantee terms, delivery charges, if the

price quoted is ex-works / ex-go-down / ex-shop.

2. Quotations must be valid for a period of 120 days from the date of opening of the tender.

3. Tenders shall be submitted in sealed envelope duly super-scribed with the Technical Bid

and commercial bid separately with the Tender enquiry Number and the Due date,

addressed to the DGM(CO.HR&S), Tamilnadu Newsprint and Papers Limited,No.67, Mount

Road, Guindy, Chennai - 600 032 and delivered before 1500hrs on the due date specified.

Tender will be opened in the presence of attending tenderer on the due date at 1600hrs on

the same day.

4. Tender Document / Form is not transferable.

5. Tender containing corrections, overwriting will not be considered.

6. Tender in which do not comply with the above conditions are liable to be rejected.

7. TNPL shall be under no obligation to accept the lowest or any other tender received in

response to this tender notice and shall be entitled to reject any tender without assigning

any reason whatsoever.

8. We reserve the right to place the order for part/reduced quantity than what is specified in

the tender.

DGM (CO.HR&S)


CONDITIONS OF TENDER

1. Quotations must be submitted in duplicate giving complete details; in particular, the offers

should clearly specify applicable taxes, make of the AHU, warranty / guarantee terms,

delivery period and delivery charges, if the price is ex-works/ex-Godown/ex-shop.

2. Quotation should be valid for a period of 120 days from the date of opening of the tender.

3. Tenders in sealed envelopes duly super scribed with the Tender No. and due date, shall be

addressed to the DGM(CO.HR&S), Tamilnadu Newsprint and Papers Limited, No.67, Mount

Road, Guindy, Chennai - 600 032.

4. Initially the technical bid submitted by the tenderer will be opened and on the basis of

submission of satisfactory documents the commercial bid will be opened on the same day.

5. This tender documents/form is not transferable.

6. Tender containing erasures or alterations will not be considered.

7. Tender in which do not comply with the above conditions are liable to be rejected.

8. TNPL will not defray any expenses whatsoever incurred by the Bidders for the preparation

of bids.

9. In case Bidder finds discrepancies or omissions from the specifications or other documents

or has any doubt on the meaning, he shall at once request in writing to the SENIOR

MANAGER (ESTATE) TNPL, for interpretation / clarification. The issue of interpretation and

clarifications shall be considered as an addendum. Copies of such addendum, if issued,

shall be signed by the Bidder and shall form a part of the bid. Verbal clarifications given

shall not be binding on TNPL.

10. Before submitting the bids, the Bidders shall make themselves fully conversant with the

technical specifications and other documents as attached so that no ambiguity arises at a

later date in this respect.

11. TNPL reserves the right to postpone the date of submission and opening of bids.

12. The bidders shall quote in English their rates/prices both in figures, as well as in words

against each item of the work as detailed in the enclosed Schedule of Quantities. In the

event of any discrepancy between the quoted rates / prices in words and that quoted in

figures, the rates/prices quoted in words shall govern.

13. The bidders must return the complete set of bid document. Each page of the bid document

must be signed and dated by the bidder. Any bid not so signed and dated is likely to be

rejected. All writing shall be in ink only. Any corrections in the entries in the Schedule of

Quantities of this bid document shall be initialed and dated by the bidder before

submission of the bid. No parts of the bid document shall be altered, overwritten or

amended by the Bidder.

14. TNPL shall be under no obligation to accept the lowest or any tender received in response

to this tender notice and shall be entitled to reject any tender without assigning any reason

whatsoever.


GENERAL CONDITIONS OF CONTRACT

1.0 Definition of Terms :

1.1 In construing these general conditions and the specifications the following works shall have

the meanings herein assigned to them unless there is something in the subject or context

inconsistent with such works.

1.2 The term `Contractor / Supplier / Bidder / Vendor shall mean the Tenderer whose tender

has been accepted by TNPL and shall include the Tenderer’s heirs, successors and assignees

approved by the Purchaser:

1.3 The `Purchaser’ shall mean Tamilnadu Newsprint and Papers Limited (TNPL), and shall

include TNPL’s heirs, successors and assignees.

1.4 The term `Sub-Contractor’ shall mean the firm or persons named in the contract for any

part of the work or any person to whom any part of the work has been sublet with the

consent in writing of the Engineer-In-Charge of TNPL and shall include his heirs, successors

and assignees approved by the Purchaser.

1.5 The Term `Consultant’ shall mean person appointed by/or on behalf of the Purchaser to

inspect supplies, stores or work under the contract or any person deputed by the

Consultant for the purpose.

a) The term `Particulars’ shall mean, the following :

b) Specifications

c) Drawing

d) Sealed Pattern denoting a pattern sealed and signed by the Consultant.

e) Proprietary make denoting the product of an individual firm.

1.6 Any other details governing the construction / manufacture and /or supply as existing for

the contract.

1.7 The term `Engineer’ shall mean Engineer, Tamilnadu Newsprint and Papers limited, Guindy,

Chennai or some other person for the time being or from time to time duly appointed in

writing by TNPL to act as Engineer for the purpose of the Contract or in default of such

appointment the Purchaser.

1.8 The term `Specification’ shall mean the specifications annexed to or issued with these

Conditions of Contract. The ‘specification’ should include described under section Technical

specifications, Bill of quantities, Drawings etc.,

1.9 The term `Site’ shall mean the place or places at which the Equipment is to be delivered or

work done by the Contractor shall include where applicable the lands and buildings upon or

in which the works are to be executed and shall also include the place or places at which

fabrication and other work is being carried out by the Contractor.

1.10 `Electrical Equipment’, `Stores’, `Work’ or `Works’ shall mean and include equipment and

materials to be provided and work to be done by the Contractor under the Contract.

1.11 The `Contract’ shall mean acceptance of the work order placed on contractor / supplier

under section (2) of these conditions and shall include these conditions of Contract,


Specifications, Schedule, Drawing, Letter of Intent of the Purchaser and any subsequent

amendments mutually agreed upon.

1.12 `Tests on Completion’ shall mean such tests are prescribed by the specifications or have

been mutually agreed to between the Contractor / Supplier and the Purchaser to be made

before the equipment is taken over by the Purchaser.

1.13 `Writing’ shall include any manuscript, typewritten or printed statement under or over

signature or seal as the case may be. Words importing `person’ shall include firms,

companies, corporations and association of individuals whether incorporate or not.

1.14 Words importing singular shall also include plural and vice versa where context requires.

2.0 Contract:

2.1 Contractor / Supplier should send their acceptance letter on receipt of `Letter of Intent’ or

work order within stipulated period. On expiry of said period or exorbitant delay in

commencing or executing the work, the Purchaser shall not be liable to any claim from the

Contractor/ Supplier for work entrusted to and may revoke the contract.

3.0 Work at Site:

3.1 The contractor should ensure that his people follow safe practices at work.

3.2 Access to the works shall be allowed only to the Contractor / Supplier, Sub-Contractors or

his duly appointed representatives. The Contractor/ Supplier shall not object to the

execution of work by other contractors or tradesman and shall afford them every facility for

execution of their several works simultaneously with his own.

3.3 Work at the Purchaser’s premises shall be carried out at such time as the Purchaser may

approve but the Purchaser shall give the Contractor/ Supplier all reasonable facilities for the

same. The Contractor/Supplier shall provide sufficient fencing, notice boards etc. to guard

the works and warn the public.

3.4 The Contractor shall obey Central, local and State regulations and enactment pertaining to

workmen and labour and the Engineer shall have the right to enquire into and decide all

complaints on such matters.

4.0 Delays:

The Contractor shall not be entitled to any compensation for any loss suffered by him on

account of delays in commencing or executing the work, whatever the cause for such delays

may be, including delays in procuring Government controlled or other materials and delay

in obtaining instructions and decisions from Engineer-In-Charge. The Contractor shall,

however, merit extension of time as hereinafter mentioned.

4.1 Liquidated Damage Clause (LD)

Any delay beyond the stipulated completion period given in the Purchase Order will attract

penalty of 0.5% per week of delay subject to a maximum of 5% of total order value.


5.0 Taking Over:

The equipment when erected at site shall be deemed to have been taken over by the

Purchaser when the Engineer will certify in writing that the equipment has fulfilled the

contract conditions.

6.0 Extension of Time:

If the Contractor is delayed in the progress of work by changes ordered in the work, or by

any cause, which the Engineer shall decide to justify the delay, then the time of completion

shall be extended by a reasonable time. No such extension shall be allowed unless requests

for extension are made in writing by the Contractor / Supplier to the Engineer within 15

days from the date of occurrence of the delay.

7.0 Other Damages:

The Contractor/Supplier shall be responsible for all injury to persons, animals or things and

for all damage to the works, structure of, and decorative work in the property which may

arise from operation or neglect of himself or any of his Sub-Contractor or of his or Sub-

Contractor’s employees, whether such injury or damage may arise from carelessness,

accident or any other cause whatever in any way connected with the carrying out of this

contract. This clause shall be held to include any damage to buildings, whether

immediately adjacent or otherwise, any damage to roads, streets, foot paths, as well as all

damage caused to the works forming the subject of this contract by frost or other

inclemency of weather. The Contractor/Supplier shall indemnify the Purchaser and hold

him harmless in respect of all and any expenses or property as aforesaid and also in respect

of any claim made in respect of injury or damage under any acts of Government or

otherwise and also in respect of any award of compensation or damages consequent upon

such claim.

7.1 The Contractor/Supplier shall reinstate all damage of every sort mentioned in this clause, so

as to deliver up the whole of the contract works complete and perfect in every respect and

so as to make good or otherwise satisfy all claims for damage to the property of third

parties.

7.3 The Contractor/Supplier shall indemnify the Purchaser against all claims which may be

made against the Purchaser, by any member of the public or other party, in respect of

anything which may arise in respect of the works or in consequence thereof and shall, at his

own expense, effect and maintain, until the work has been ‘taken over’.

7.4 The Contractor/Supplier shall also indemnify the Purchaser against all claims which may be

made upon the Purchaser whether under the Workmen’s Compensation Act or any other

statute in force during the currency of this contract or at common law in respect of any

employee of the Contractor/Supplier or of any of his sub-contractor and shall at his own

expense effect and maintain until the work has been `Taken Over’, with an approved office.

7.5 The Purchaser, with the concurrence of the Engineer, shall be at liberty and is hereby

empowered to deduct the amount of any damages compensation costs, charges and

expenses arising or accruing from or in respect of any such claims or damages from any

sums due to or become due to the Contractor/Supplier.


GENERAL INFORMATION TO BIDDERS

1.0 The bids are invited for supply, installation, testing & commissioning of Air Handling Units

for Corporate office building with associated ducting, Insulation, piping, cabling etc at TNPL

on No.67, Mount Road, Guindy, Chennai - 600 032.

2.0 The Air Handling Units shall be installed in the AHU rooms of each floor of the building.

3.0 It is important that the bidder must satisfy himself before quoting that the space existing is

adequate for installation of his AHU along with all equipments and accessories as no extra

space can be provided. The tenderers must visit the site and take the actual measurement

before quoting. The bidders shall furnish a fully dimensioned layout for his Package unit,

with all equipment and accessories along with quotation.

4.0 Bidder shall furnish the data called for in data sheets and the schedules in the standard

Proforma to facilitate correct evaluation of his bid in a most expeditious manner. It is in the

interest of the bidder to submit the bid in above manner with complete technical details,

failing which it is likely that his bid may not be considered.

5.0 Bidder shall be deemed to have carefully examined the specification in its complete form

and to have fully informed and satisfied himself as to the details, nature, character and

quantities of the work to be carried out, site conditions, and other pertinent matters and

details.

6.0 It is the intent of the owner/purchaser to incorporate these specification documents in the

final contract order for the supply of material, equipment and services. Bidders are required

to review these documents and clearly state in their proposals the acceptance of the same.

Exceptions, if any shall be clearly stipulated in appropriate bidding schedule. The final

contract between purchaser and vendor shall be subjected to such changes, if any, mutually

agreed upon by purchaser and vendor and included in the main text of the contract/order.

7.0 Bidder shall clearly specify all the deviations with respect to this specification in the

appropriate schedule.

8.0 SCHEDULE OF QUANTITIES TO BE FURNISHED BY VENDORS

8.1 All equipments mentioned in the enclosure should conform to the respective technical

specifications. Only main items of the tender have been brought out specifically in this

schedule, however all accessories as per specification or otherwise should be furnished at

the time of quotation with cost of individual item.

8.2 Tenderers are required to fill in unit rates for all the items mentioned in the enclosure and

any additional items quoted by them in the Financial Bid. In absence of the unit rates, the

offer may be considered as invalid.

8.3 All the equipments supplied shall be as per the ‘List of Approved Make’ attached.

9.0 ITEMS TO BE FURNISHED BY THE PURCHASER:

9.1 Following shall be furnished by the purchaser:

9.1.1 Building, foundations and trenches.


9.1.2 Water and power for testing and commissioning.

10.0 SERVICES SUPPLIED BY PURCHASER DURING ERECTION:

The purchaser will provide for the contractor following services during the performance of

work.

10.1 Temporary electric power at 415 V, 3 ph., 50 Hz at one point only which will be within 50 M

of location of works free of cost. Water shall be provided free of cost for testing and

commissioning.

10.2 The contractor shall make his own arrangement for supply, erection and dismantling on

completion of works of his temporary distribution system, distribution panels and other

equipments they may require to receive the power from the purchaser's supply points.

10.3 The contractor's temporary distribution system shall be subjected in every respect to the

approval of the purchaser and shall be arranged so as to avoid any interference with other

operations on the site.

10.4 The purchaser will not hold himself responsible for the consequences of any interruptions

to the continuity of the power supply or power system voltage and frequency fluctuations.

10.5 The electric power shall not be used for heating purposes.

10.6 Electrical power made available to the contractor, during testing and commissioning for the

Air handling unit is free of charge.

10.7 There is no EOT crane or mono rail to assist in erection work. Tenderer should provide

suitable derricks & tripods for lifting heavy load.

11.0 SERVICE SUPPORT, SPARES & TOOLS:

11.1 The bidder shall provide in detail the Service Support Set-up in Chennai of the manufacturer

or himself and lead time for replacement of faulty parts and for providing technical service.

11.2 The tenderer shall bring complete set of tools & wrenches for making adjustments, repairs

& preventive maintenance including those required for erection.

12.0 COMPLETION DRAWINGS (FINAL DRGS) & MANUALS:

8.1 The contractor shall submit tracings in original with five prints of all installation drawings

based on which equipments are installed & commissioned.

8.2 Contractor shall supply the following literature in four sets:

a. Start-up, operation and maintenance instructions of Air-conditioning unit and its parts.

b. Installation instructions.

c. Field wiring diagrams.

d. Operation and Maintenance Manual of electrical parts used in the same.


INSTRUCTIONS TO BIDDERS & SPECIFIC

NON-TECHNICAL REQUIREMENTS

1.0 The details in respect of Earnest Money, Security Deposit

a) Earnest Money Deposit:

Bidder must deposit Rs. 50,000/- (Rupees Fifty Thousands only) towards the EMD along with the

tender failing which tender will be rejected. EMD will be accepted in the form of Bank Draft

only favoring TAMILNADU NEWSPRINT AND PAPERS LIMITED, payable at Chennai.

b) Security Deposit:

5% (i.e. five percent) of the gross value of the work will be deducted from the Contractor’s bills

towards Security Deposit.

c) Refund of Security Deposit:

The Security Deposit (5%) will be refunded to the contractor after the expiry of defect liability

period.

d) Defect Liability Period:

12 (twelve) calendar months from the date of satisfactory completion will be taken as defect

liability period.

e) The EMD of the Bidders other than successful bidder will be refunded within 2 months from

the date of opening of the tender and no interest shall be paid against the said deposit.

f) In case the successful bidder fails to undertake the said work, his EMD amount will be

forfeited.

g) The EMD paid shall be part of Security Deposit, i.e. 5% of the Contract value which will be

refunded after expiry of Defects Liability period.

h) The Bidder should submit Tender document fee (Non-refundable) of Rs.590/- by DD in

favour of “TAMILNADU NEWSPRINT AND PAPERS LIMITED” payable at Chennai (500+18%

GST).

2.0 No interest will be payable on the deductions towards Security Deposit/ Earnest Money.

3.0 The Bidder shall submit the copy of their PAN card and GST Certificate.

4.0 Prices and rates quoted shall include cost of all materials, labour, plant, equipment,

temporary work, tools, setting out, supervision, transport, taxes, royalties, octroi and any

local tax or levy payable on all transactions, insurance and everything necessary for due

performance of work under this contract.

5.0 Prices and unit rates shall be valid even if the contract is split.

6.0 Contract should be fixed rate contract. No escalation in prices of the materials during the

currency of the contract is permitted. However any statutory variations like change in excise

duty, taxes etc. if levied after award of the work shall be paid on production of proof of such

changes.


7.0 Site Visit:

The bidders may like to visit the work site before submitting their bids to get conversant

with site conditions, which may affect the work.

Location of Site: Tamilnadu Newsprint and Papers Limited

No.67, Mount Road, Guindy, Chennai-600 032

8.0 The work should be completed within 3 months from the date of issue of Purchase Order.

9.0 Work shall commence at site within 1 month from the date of issue of letter of Purchase

Order.

10.0 The Contractor should plan and give his daily program for execution of work in advance so

that no disturbance is created in the routine working of TNPL.

11.0 Turnover Tax/Works Contract Tax:

Turnover tax applicable to this contract shall be mentioned clearly and included by the

bidder in his bid. No claim shall be entertained by TNPL thereafter.

12.0 Date of Taking Over:

Site shall be deemed to have been taken over by TNPL when Engineer In-Charge certifies

the completion of work in all respect as per tender conditions and specification.

13.0 Income Tax as per the prevailing rates will be deducted from the progressive bills.

14.0 The contractor shall not without the consent in writing of the Owner assign or sublet the

contract.

15.0 No labour below the age of 18 years shall be employed at site.

16.0 Contractor shall be liable to pay workman compensation to his labour as per prevailing

rules for any accident occurring at our site.

17.0 The contractor shall pay wages to his workmen as per the Statutory Minimum Wages Act.

18.0 The Contractor shall provide all risk insurance for his men, material and machines and

absolve us of all risk and liabilities whatsoever pertaining to his men, material and machines.

19.0 The Contractor will arrange for photo passes of his personnel and get the same endorsed

by TNPL Estate/Security Department before beginning the work.

20.0 The Contractor will ensure that his workmen follow safe practices at Work.

21.0 The Contractor will be permitted to work on weekends (Friday from 5.00p.m. to 6.00a.m of

Monday) and also on public holidays.

22.0 No labour camp etc. will be allowed to be put up inside or in the vicinity of TNPL.

23.0 Any dispute arising from this contract will be referred to two arbitrators one to be

appointed by you and one by us. The two arbitrators, in the event of their disagreement


will appoint an Umpire. The decision of the Umpire shall be final and binding. The

arbitration will proceed as per Indian Arbitration Act, 1940, as amended up to date.

24.0 The contractor should ensure that his engineer / supervisor is present at site throughout the

progress of works till completion.

25.0 Terms of Payment:

Payment for pipe lines shall be made as per unit length i.e. per running mtr / feet.

25.1.1 Unless otherwise agreed to in writing between the Purchaser and the Contractor/Supplier,

payment for the delivery of the equipment approved by the Inspector will be made as

follows:

a) 40% of the Contract value against delivery, pro-rata of the value of goods delivered and

after checking the same at site.

b) 40% on completion of erection.

c) 15% on commissioning and final inspection and testing at site.

d) 5% against PBG valid for 12 months from the date of handing over or after expiry of the

Defect Liability period as stated in Clause 1d) page 9.

26.0 The bidder should submit technical data sheet, drawings, any other technical detailed asked

for in the tender with Part II i.e. Technical Bid of the Tender.

27.0 The schedule of quantities and rates shall be read in conjunction with the specification,

tender drawings, other tender documents, relevant IS Codes, Engineering hand books, etc.

the Contractor shall not rely merely on the description given in the Schedule of Quantities.

28.0 The quantities mentioned in “Bill of Quantities” are estimated quantities. However the

payment shall be made as per actual quantities measured at site, after completion of work.

29.0 Contractor will be fully responsible for lifting, shifting and handling TNPL’s properties such

as any articles and materials lying nearby to proper place as instructed by Site In-Charge.

30.0 All the materials proposed to ne used shall be used only after approval and tests of the

Engineer-In-Charge as per specifications.

31.0 All the debris shall be removed by the Contractor at his cost to any nearest GCMP approved

dumping yard.

32.0 Storage and custody of material, till the time of handing over to TNPL, shall be the

responsibility of contractor.

33.0 The contractor after award of work, should submit detailed schedules showing program and

order in which contractor proposes to carryout the work with dates and estimated

completion time for various parts of work. This should be submitted in the form of Bar-

chart.

34.0 The Engineer can instruct the contractor to make any alteration, omission, or variation in

work. The difference in cost due to instruction shall be added or deducted from contract

price as the case may be in accordance with the rate applicable in the contract.


35.0 DEVIATION FROM THE SPECIFICATIONS:

The Contractor must tender for the equipment as herein specified but may submit alternate

proposals for modifications to details where such modifications offer technical advantages

and will make cost savings to the owner. The basis and details of calculations of operating

cost and the net expected final saving shall be indicated wherever such a claim is made.

The acceptances or otherwise of alternate proposal/deviations/ modifications etc. will be

decided solely by the owner.

36.0 Inspection of Material & Equipment:

Supplier shall arrange for inspection/testing of AHUs at his works. TNPL will have liberty to

inspect / test the parts of AHUs during the manufacturing / assembly. No charges will be

paid extra towards inspection / testing. The bidder shall make necessary arrangements for

travel, boarding & lodging for 3 engineers from TNPL deputed for inspection & testing of

the AHUs at manufacturer’s premises.


BASIS OF DESIGN & SCOPE OF WORK

1.1 Design Parameters for selection of air handling unit & its components shall be:

Maximum face velocity across pre-filter - 400 – 450 Ft / Min

Maximum face velocity across coils - 450 – 500 Ft / Min

Maximum fan outlet velocity - 1600 Ft /Min

Maximum fan speed - 800 RPM

Maximum fan motor speed - 1500 RPM

1.1 Piping shall be sized for the following design parameter

Maximum flow velocity - 8 Ft./Sec. (2.5 Mtrs./Sec.)

Maximum friction - 5 Ft. per 100 Ft. run

1.3 Design parameters for duct design shall be

Max. flow velocity [S.A. Duct] - 1200 Ft. / min.

- 365 Mtr / min.

Max. flow velocity [R.A. Duct] - 800 Ft./min.

- 240 Mtrs./min.

Max. friction drop - 0.1” WG/100 Ft. run

- 1 cm WG/100 M run

Max. velocity at supply air diffusers - 500 Ft./Min.

- 150-200 Mt./Min.

2.0 The proposed new AHUs will be put after replacing the old AHUs, which are at present in

running position. The contractor shall have to carry out the work in short span of time

(during shut down), preferably during weekends including Sunday and holidays. The

contractors need to work day and night to ensure minimum disturbance to the office.

3.0 The contractor should inspect the site before quoting and ascertain for himself the nature,

character and extent of work to be executed and should include all items and services

necessary, whether specially mentioned or not in the specifications, scope etc. to meet with

the intent and purpose of these specification.

4.0 After award of work contractor should submit the GA drawing as well as data sheet of AHU,

parts etc. for engineer’s approval. He shall start the manufacturing only after the approval.

6.0 During the replacement of AHU contractor shall cut/modify the existing header/coil

connection as per the new requirement. The new piping shall be paid on RMT basis as per

the tender rate. Similarly ducting connection includes cutting / modifying the existing

ducting including making new plenum, if necessary. The new ducting shall be paid on Sqm

basis as per tender rate.


7.0 The manufacturer of AHU should have the single space for assembly & testing of AHU

preferably at his work, where different section of AHU like casing, coil etc. manufactured.

8.0 Supplier shall arrange for inspection/testing of AHU at his works. TNPL will have liberty to

inspect/test the parts of AHU during the manufacturing/assembly of AHU. No charges will

be paid extra towards inspection/testing. The bidder shall make necessary arrangements for

travel, boarding & lodging for 3 engineers of TNPL deputed for inspection & testing of the

AHUs at manufacturer’s premises.

9.0 Power supply shall be given by TNPL at AHU motor as per requirement but the termination

at motor end (With Copper Lugs) shall be in the scope of contractor.

9.0 All welding must conform to the requirements of applicable IS standards. All welding

procedures and details shall be subject to the approval of Engineer In-Charge. All necessary

arrangements for working at heights above the floor level like scaffolding rope etc. shall be

arranged by the Contractor. All materials, equipments, tools & tackle, shifting and lifting

arrangement and other necessary items required to carry out the work shall be arranged by

the Contractor. All other necessary equipments, arrangements like welding machine, gas

cutter, welding rods, drill bits, drilling machine, grinder, gas cylinders for gas cutting etc.

shall be arranged by the Contractor. Electricity & water needed for carrying out the work

shall be provided free of cost by TNPL.

11.0 The Contractor shall make arrangements to store his tools, equipments etc. in his own tool

box having proper locking arrangements. Material required for carrying out the work such

as flanges, nuts and bolts, rubber gasket, pipes etc. shall be provided by the Contractor. All

the above material shall be of high standards and subjected to the approval of the Engineer

In-Charge.

12.0 The work shall be carried out with least disturbance to the users. The shut down if any

required for carrying out the works shall be minimum and advance intimation to be given.

Shut down periods will be intimated for the work to be taken up after obtaining the

necessary approval form the Users.

13.0 The Contractor shall inspect the site and ascertain for himself the nature and extent of work

to be executed and shall include all the items and services necessary whether specifically

mentioned or not in the tender specification, drawing, so as to meet the intent and purpose

of this specification.


TECHNICAL SPECIFICATIONS

A. AIR HANDLING UNITS

1.0 SCOPE

The scope of the contractor not limited to but inclusive of Selection, Supply of AHUs, Fan,

Motors, Drive set, Filters, Mounting frame, Gaskets, Weather-proof flexible connections,

Dampers, lifting, installation, testing, commissioning of the system as per the Indian &

International standards etc., All the units should be provided with manufacturer test

certificates. The supplier should arrange for the necessary factory inspection incase the

project needs the same at their cost.

2.0 TYPE

The air handling units shall be double skin construction, draw-thru type comprising of

various sections, filter section, coil section and fan section, mixing box, (wherever the

return air and fresh air are ducted) as shown on drawings and included in schedule of

quantities.

3.0 CAPACITY

The air handling capacities, maximum motor horse power and static pressure shall be as

shown on Drawings and in Schedule of Quantities.

4.0 CODES & STANDARDS

The design, materials, manufacture, inspection, testing and performance of the AHU’s shall

comply with all currently applicable statutes, regulations, codes and standards in the locality

where the equipment is to be installed. Nothing in this specification shall be construed to

relieve the CONTRACTOR of this responsibility. In particular, the AHU’s shall confirm to the

latest edition of the following standards:

ANSI 89.1 Safety code for mechanical refrigeration.

IS:659 Safety code for air-conditioning.

IS 7613 Methods of Testing panel type Air Filters for Air-Conditioning and

Ventilation purpose

ASHRAE 33 Methods of testing – Forced Circulation Air Cooling and Air Heating Coils

ARI 410 Forced circulation air –air cooling and air heating coils.

ARI 430 Central-station air handling units.

AMCA 210 Laboratory methods of testing fans for ratings.

NFPA 90 A Installation of Air-Conditioning and Ventilation Systems.

5.0 DESGIN CRITERIA

All fans shall be rated, tested, and certified in accordance with AMCA standards.

All coils shall be rated, tested, and certified in accordance with ARI standards.

Use dielectric unions or flange kits for dissimilar metal connections capable of galvanic

corrosion.

Filters shall be tested and certified in accordance with AHSRAE Standard 52.

Units shall be designed in accordance with site seismic requirements.

All instrumentation and controls shall be commercial quality.


AHU panel shall be selected as per the location & connection required as per the

drawing and project requirements.

6.0 SECLECTION CRITERIA

The equipment shall be of factory fabricated only and shall be selected for the given air

flow and static pressure at the lowest operating noise level, High efficiency, Capacity

ratings, Low power consumption, with operating points clearly indicated, properly

balanced shall be submitted and verified at the time of testing and commissioning of

the installation.

The fan outlet velocity shall be within 10m/sec.

The noise level at 1.5m distance from the equipment shall not exceed 65dba.

The fan speed for the fan dia above 450mm shall not exceed 1000rpm.

The fan speed for the fan dia up to 450mm shall not exceed 1500rpm.

The fan efficiency shall not be less than 70%.

The face velocity across the pre-filter and fine-filter shall not be exceeding 2.5m/s.

The face velocity across Cooling coil shall not be exceeding 2.5m/s.

The cooling coil should be selected for the actual capacity mentioned in the BOQ only

based on the actual mixing air and chilled water inlet & outlet temperature.

All the Chilled water / Hot water system Air Handling Units shall be provided with

Thermal break profile, for the AHU of Outdoor application and for the AHU with ducted

supply & return air.

Necessary powder coated GI canopy to be provided for the AHU located at outdoor.

7.0 SUBMITTALS

General arrangement of the (GA) drawings of the AHU, fan equipments with parts

details, static & operating weight.

Fan Performance curve for the required air quantity and the static head, showing the

Rpm, Efficiency, Fan absorbed power, Actual motor capacity, Max.fan speed, Max

absorbed power, noise level in dBA at different octave band spectrum from 63hz to

8khz. etc.,

Fan total static pressure drop calculation indicating the internal pressure drop and

external pressure drop in mm of water column or in Pascal.

ARI certified performance data at standard design conditions and performance data for

the actual site conditions, dimensional data, and installation requirements should be

provided for all the cooling / heating coils.

Filter type with filtration data, dimensional data, and installation requirements should be

provided for the filters.

AHU noise level calculation using the Fan Inlet & outlet noise level in different octave

band spectrum from 63hz to 8 kHz and the attenuation by the cabinet etc.,

Fan total static pressure drop calculation indicating the AHUs internal pressure drop and

external pressure drop in mm of water column or in Pascal.

Seismic design calculations

Factory fan vibration balancing reports

Factory performance test certificates.


8.0 TYPES OF AIR HANDLING UNITS

o Horizontal Floor Mounted units

o Vertical Floor Mounted units

9.0 CONSTRUCTION DETAILS

9.1 CABINET

The cabinet shall be constructed suitable to accommodate the fan section, drive motor,

cooing coils, heating coils, filters, mixing box, dampers etc., as required. Necessary powder

coated GI canopy to be provided for the AHU located at outdoor.

The cabinet shall be of airtight construction and sufficiently rigid for the entire capacity of

the unit. The cabinet shall be constructed with double skin acoustic panels with minimum

0.8mm thick Pre painted Galvanized sheet outer skin and minimum 0.8mm thick plain

Galvanized sheet inner skin. All the panels shall be of thickness 25/50mm as mentioned in

the BOQ. The insulation shall be sandwiched between the inner & outer skin with pressure

injected with CFC free Polyurethane Foam (PUF) of density not less than 40kg/m³ and

thermal conductivity K value not exceeding 0.020w/m⁰K at 0⁰C as per ASTM-C518.

The AHU panels shall be of modular construction. All the panels shall be detachable or

hinged. The hinges shall be of powder coated die-cast aluminum with stainless steel pivots.

EPDM gaskets and stainless steel screws are only to be used for fastening the panels. The

AHU panels to be provided with opening for the drain pipe and electrical cable entry. The

Entire panel shall be mounted on aluminum alloy channel of minimum 10mm high. The

lifting lugs of minimum 4Nos. to be provided on the base channels. The entire rigid &

corner joint frame shall be of high rigid Extruded Aluminum alloy channels.

The AHU shall be provided with double skin quick opening type panel door for the fan and

the filter sections. The door should be provided with powder coated die-cast aluminum

hinges and hard nylon handles. The door should be providing with view port and limit

switches. The AHU should be provided with marine lamp suitable for wet room application

for easy visibility at the time of service.

The fan & motor to be mounted on the high grade aluminum extruded slide rail base

frame. It should be isolated from the main casing using high quality vibration isolators. The

fan outlet shall be connected to the main casing, using high quality fire and moisture

resistant flexible connection to avoid vibration transmittance. The AHU to be provided with

high grade extruded opposed aerofoil blade leak proof outlet damper suitable for the

manual or motorized operation as required.

** All the AHU units located outdoor should be suitable for outdoor ambient condition and

shall be provided with necessary weather canopy. And all the Cooling / Heating AHU

connected directly with supply and return air duct or located in the outdoor condition

should be provided with Thermal break profile section.


9.2 FAN & MOTOR SECTION

The design, materials, construction, manufacture, inspection, testing and performance of

fans shall comply with all currently applicable statues, regulations and safety codes in the

locality where the equipment is to be installed. The equipment shall also confirm to the

latest applicable Indian or equivalent standards. Other international standards are also

acceptable, if these are established to be equal or superior to the listed standards. The fan

performance curves shall be AMCA certified. Contractor shall also submit corrected

performance curves for the fan considering the as installed condition of the fan at site.

All fans shall be of factory fabricated only and shall be selected for the lowest operating

noise level. High efficiency, Capacity ratings , Low power consumption, with operating

points clearly indicated, shall be submitted and verified at the time of testing and

commissioning of the installation.

The EC Centrifugal Fan unit shall be of rugged bolted construction made of sheet steel,

statically and dynamically balanced.

The fans should be Single Inlet Centrifugal Impeller with High Efficiency Backward curved

blades and external rotor EC (Electronically Commutated) motor, energy optimized for

operation without spiral housing for high efficiency and favorable acoustic behavior. The

Impeller shall have 7-bladed backward curved profiled blades (Aerofoil) for achieving low

noise. The high efficiency backward curved impeller with rotating diffuser, made of high

performance composite material, with external rotor motor shall be statically and

dynamically balanced according to DIN ISO 1940 Part 1.

The EC fan should be capable of being fitted in horizontal or vertical position in the AHU,

depending on the application.

Galvanised Inlet cone shall be provided with a nozzle for volume flow measurement of the

fan.

The minimum efficiency class of the motor shall be IE4. The motor shall be external rotor

motor construction with integrated electronics and suitable for continuous operation. The

speed of the motor shall be variable depending on an external control signal. The fans shall

be Modbus RTU compatible for communication with BMS (Building Management System).

The fan in totality shall be of most efficient type so that the power consumption and noise

level is minimal. The EC motor shall have a wide voltage input range: 3~380…480V, 50/60

Hz.

The motor shall be minimum IP54 protection class, with Thermal class 155 (Insulation class

F). The EC motor shall be provided with suitable protection from moisture & hot climate.

The ball bearing shall be provided with long time lubrication for maintenance free

operation.


Integrated Electronics: The device electronics shall be protected from overload by the Active

Temperature Management, so that if the ambient operating temperature exceeds the

design limit then the fan is not switched off immediately. In such a condition the fan should

be operational at lower speeds, till the time the operating ambient temperature drops

down.

The EC fan shall meet all necessary EMC (Electromagnetic Compatibility) directives. The EC

fan should comply with applicable EMC standards: Interference Emission Standard EN

61000-6-3 / 2.

External VSD (Variable Speed Drive) is not required for speed modulation of EC fans.

Fan characteristic curves shall be related to measurements on an inlet- side chamber test rig

in accordance with DIN 24163 Part 2 OR ISO 5801.

The performance data of the fan shall comply with Precision Class 2 according to DIN

24166.

The EC Fan shall have the following protective features already integrated in the controller:

Overvoltage protection

Short Circuit protection

Under voltage/ Over voltage detection

Locked rotor protection

Line fault detection

Active Temperature Management for thermal protection of motor and electronics

Alarm relay 250V/2A

Over temperature protection of electronic and motor

External LED display shall be provided for indication of the status of the fan

9.3 CHILLED WATER COOLING COIL SECTION

The Cooling Chilled Water Coil shall be suitable for chilled water flow. The number of rows

of cooling coil shall be as per BOQ or as per the manufacturer selection whichever is

greater.

The coil section of the AHU shall be of the cartridge type, removable from the side of the

casing and supported over the entire length of the coil. The Cooling coil section shall have

10mm to 15 mm dia inner grooved copper tubes of wall thickness not less than 0.40mm

with minimum of 0.15mm thick hydrophobic coated sine wave aluminum fins firmly bonded

to copper tubes assembled in zinc coated steel frame. The fins spacing shall be of 10 to 13

fins per inch. Face and surface area shall be such as to ensure rated capacity from each unit

and such that air velocity across each coil shall not exceed 2.5 m/sec. An appropriate panel

of the Coil Section shall incorporate factory made openings for coil inlet & outlet

connections. Tube shall be hydraulically expanded for minimum thermal contact resistance

with fins. The Coil shall be mounted on castors to facilitate removal for cleaning. Flanges of

resilient isolation material shall be provided both at the inlet and outlet connections of all


cooling coils with necessary bushes of similar material to minimize transmission of vibration

to connected piping. Coil shall have automatic air vents, the vent outlets beings piped to

the drain pan with a copper pipe. Coil performance shall be rated in accordance with ARI

Standard 410. Each coil shall be factory tested under water. Each coil shall be leak tested at

17 bars. The Header in the coil section should be of copper only. For the chilled water

application the coil header shall be provided with necessary arrangement for the

connecting copper pipe to the MS pipe.

The coils shall be mounted over an adequately sized condensate drain pan. Particular, care

shall be taken to ensure that condensate is drained totally without leaving any stagnant

pools anywhere in the unit. The drain pan shall be of stainless steel of thickness not less

than 1.2mm and of grade not less than SS 304 of minimum 100mm high and shall be

insulated for thermal protection with of not less than 15mm thick Nitrile rubber or

equivalent insulation to avoid any surface condensation.

Moisture eliminator shall be fitted after the cooling coil / humidifier section to avoid

carryover of moisture. Eliminator blades are made of PVC / Stainless steel and are

assembled within in a heavy gauge Galvanized / SS steel frame.

9.4 MIXING BOX SECTION

The mixing box section shall be used wherever the return air is ducted directly to the AHUs.

The mixing box shall be provided with aluminum aerofoil type opposed blade damper for

Return air and Fresh air suitable for manual or motorized operation as required.

9.5 FILTER SECTION

The filtration are classified as per the standards of ASHRAE 52.2, DIN 24185, EN779,

EN1822 based on the efficiency of filtration as a function of specific particle sizes. (For more

details regarding the filtration kindly see the details under the main heading AIR FILTERS)

The AHUs shall be provided with Pre filter, Fine filter, as mentioned in the BOQ and

requirements. These filters should be fixed on the modular type mounting frames made of

heavy gauge Powder coated GI or anodized aluminum. The filters shall be with Neoprene /

felt gasket to be used for airtight fixing of the filters. These filters should be provided with

handles for easy removable.

The Pre & fine filters shall be provided at the suction side of the fan section before the coil

sections.

Pre filter:-

The pre filters shall be of quality not less than MERV-8 or equivalent of ASHRAE standards.

The Pre filters are with high quality high graded density synthetic fiber media supported by

HDPE and aluminum mesh. These filters should offer a lesser initial pressure drop with high

dust holding capacity. These filters should provide longer life. It should have temperature

resistance of 100⁰C and Flame retarding as per DIN 53438 shall be of Class-F1. The filter

should be selected with the face velocity not exceeding 2.5m/sec (500fpm) and initial


pressure drop not exceeding 40pascals and final pressure drop under clogged condition

shall be within 100 Pascal. These filters should be air cleanable and washable with water.

The filter outer casing shall be of heavy gauge Anodized aluminum or Powder coated GI.

Fine filter:-

The pre filters shall be of quality not less than MERV-13 or equivalent of ASHRAE standards.

The Fine filters are with high quality high graded density synthetic fiber media supported by

HDPE and aluminum mesh for cleanable type and with Glass fiber for disposable type.

These filters should offer a lesser initial pressure drop with high dust holding capacity.

These filters should provide longer life. It should have temperature resistance of 100⁰C and

Flame retarding as per DIN 53438 shall be of Class-F1. The filter should be selected with the

face velocity not exceeding 2.5m/sec (500fpm) and unit should be provided with multiple

pleat to have the velocity across the media is less than 0.5m/sec (100fpm) The initial

pressure drop not exceeding 70pascals and final pressure drop under clogged condition

shall be within 150pascals. These filters should be air cleanable and washable with water.

The filter outer casing shall be of heavy gauge Anodized aluminum or Powder coated GI.

9.6 ACCESSORIES

Each air handling unit shall be provided with manual air vent at high point in the cooling

coil and drain plug-in the bottom of the coil. In addition, the following accessories may be

required at air handling units, their detailed specifications are given in individual sections, &

quantities separately identified in schedule of Quantities.

a) Insulated butterfly valves, balancing valves, `Y’ strainer, union & condensate

drain piping with ‘U’ trap up to sump or floor drain in air handling unit room, as

described in section “Piping”. G.I. insulated condensate drain piping with drain

valve, up to sump or floor drain within the air handling unit room. The drain shall be

provided with proper ‘U’ loop. Only piping and valve shall be measured and paid at

unit rate.

b) Thermometers in the thermometer wells &pressure gauge (with cocks) within gauge

ports in chilled water supply and return lines as per the section “Piping”.

9.7 ISOLATORS

Vibration isolators shall be provided with all air handling units. Vibration isolators shall be

cushy foot mounting type. Minimum vibration isolation efficiency shall be 90%.

9.8 FRESH AIR INTAKES

Extruded aluminium construction duly anodized (20 microns and above) fresh air louvers

with bird screen and dampers shall be provided in the clear openings in masonry walls of

the air handling unit rooms having at least one external wall. Louvers, damper, pre-filters,

ducts and fresh air fan with speed regulator shall be provided as shown on Drawings and in

Schedule of Quantities. Fresh air dampers shall be of the interlocking, opposed-blade louver

type. Blades shall be made of extruded aluminium construction and shall be rattle-free.

Dampers shall be similar to those specified in “Sheet metal works”. Fresh air fans and fresh

air intakes shall be as per the requirements of Schedule of Quantities.


9.9 PAINTING

Shop coats of paint that have become marred during shipment or erection shall be

cleaned off with mineral spirits, wire brushed and spot primed over the affected areas, then

coated with paint to match the finish over the adjoining shop painted surface.

9.10 FACTORY TESTS

The Contractor / manufacturer shall describe the tests that will be conducted at their

works on the Air Handling Units. They shall furnish a test certificate / certificates to the

effect that such tests have been duly performed on the AHUs.

Tests shall be conducted on all AHU’s at the factory for measurement of fan delivery vs.

static Pressure, total pressure, BKW, efficiency & noise level at 100%, 80% 60%, 50% & 40%

speeds. The cooling/heating coil performance shall be tested at the factory for 100%, 80%

60%, 50%, 40% & 20% water flow for water side pressure loss, air temperature after the coil

etc., The Consultants / Project managers / Architects shall be intimated in advance of the

date of the tests, which they will witness at their option.

10.0 INSTALLATION

A manufacturer’s representative for the fans shall be provided as necessary to assist the

Subcontractor during installation, and to provide written certification that the equipment

has been installed complete as specified and in accordance with the manufacturer’s

directions as approved.

All the AHUs to be installed over a civil / structural elevated pedestal / platform of height

not less than 100mm and shall be provided with ripped neoprene rubber gasket or

additional cushy mounts to avoid any vibration transmittance from AHUs.

All fan equipment shall be verified by field vibration tests that factory balance has been

maintained during shipment and erection. Field rebalances should be done if required

without any additional cost.

The floor below the AHU and the AHU room shall be finished by respective agencies with

gentle slope towards the drain point to avoid any water stagnation below the AHU / AHU

room. The AHU room door shall be of air tight, panel type, acoustically insulated Double /

Single door type of width suitable to shift the AHU & fan to the room. The AHU room shall

be provided with 100mm high threshold at the door point by the respective agencies. The

AHU room shall be provided with one normal water point for easy cleaning of the AHU

room and the filters etc.,

The Ceiling Suspended Air Handling units shall be installed with necessary heavy duty

fasteners, threaded rods, Galvanized MS angles / channels supports, spring / rubber mount

isolation as required. The Contractor should ensure that the equipment vibration should

not transmit to the structures.

11.0 TESTING, ADJUSTING & BALANCING

Cooling capacity of various air handling unit models shall be computed from the

measurements of airflow and dry & wet bulb temperature instruments. The Volume control

damper shall be used for air adjustments and the water side valve shall do the water flow

adjustments. The Contractor is responsible in all the respects to balance the whole system.

Computed results shall confirm to the specified capacities and quoted ratings. Power

consumption shall be computed from measurement of incoming voltage and input current.


12.0 PERFORMANCE DATA & TESTING

Air handling units shall be selected for the lowest operating noise level of the equipment

for performance rating and power consumption data with operating points (On Fan Curve)

clearly indicated shall be submitted with the tenders and verified at the time of testing and

commissioning of the installation.

Cooling capacity of various air handling units models be computed from the measurements

of air flow and dry and wet bulb temperatures of air entering and leaving the coil. Flow

measurements shall be by an anemometer and temperature measurements by accurately

calibrated mercury-in-glass thermometers. Computed results shall conform to the specified

capacities and quoted ratings. Power consumption shall be computed from measurements

of incoming voltage and input current.

The following test result shall be furnished during commissioning in the presence of

department’s Engineer;

a) Air Side

Air Flow Rate in CFM or Cu.mt per hour

Static pressure in mm / wg

Entering Dry bulb & Wet bulb temperature

Leaving Dry bulb & Wet bulb temperature

b) Water Side

Inlet temperature in degree C

Outlet temperature in degree C

Pressure drop in psig


B. SHEET METAL WORK

1.0 SCOPE

The scope of this section comprises the supply and installation of all sheet metal ducts.

2.0 MATERIAL

Ducts shall be made of galvanized steel sheets. Galvanized steel sheet shall be of Class VIII

– light coating of zinc, nominal 120gms/Sqm as per IS-277.

2.1 The thickness of sheets shall be as given below:

Dimensions Gauge

Type of Joints Type of Bracings G.I AL

Upto 600 24 22 G.I. Flange at 2.5 centre Cross bracings

601 to 750 24 22

25 x 25 x 3 mm Angle iron

frame With 6 mm dia. Nuts

& bolts

25 x 25 x 3 mm MS angles

bracing at 1500 mm from

joints

751 to 1000 22 20



& bolts



joints

1001 to 1500 22 20



& bolts



joints

1501 to 2250 20 16


to be Cross braced

diagonally with10 mm dia.

Nuts and bolts at 125

centre.

40 x 40 x 3 mm MS angle


joints or 40 x 40 x 3 mm

MS angle diagonal

bracing.

2250 &

above 18 14


to be Cross braced

diagonally with10 mm dia.

Nuts and bolts at 125

centre.

50 x 50 x 3 mm MS angle


joints or 50 x 50 x 3 mm

MS angle diagonal

bracing.

3.0 HANGERS FOR DUCT

Duct Size

[mm]

Spacing

[M]

Size of MS equal angle

[mm x mm]

Size of rod dia

[mm]

Upto 750 2.5 40 x 3 10

751 to 1500 2.0 40 x 3 12

1501 to 2250 2.0 50 x 3 15

2251 to above 2.0 50 x 3 15

** All the MS angle, use for duct support & brazing etc, shall be hot dip galvanized.

4.0 DAMPERS

4.1 VOLUME CONTROL DAMPERS


All volume control dampers shall be louver dampers of robust construction and tight fitting

of with multi opposed blade construction of low leakage type, lever operated and complete

with locking devices which will permit the dampers to be adjusted and locked in any

positions and clearly indicating the damper position. The method of handling and control

shall be suitable for the location and service required. The outer casing shall be made out of

1.6mm.thick GI welded frame with flat type 1.6mm. GI sheet blade with galvanized steel

spindle, provided with bronze bushes, suitable links, levers and quadrant, handle as

required for their proper operation, control or setting to any desired position, flanges to

connect to the equipment / duct. Dampers and their operating devices shall be made

robust, easily operable. Every damper shall have clear indication showing the damper

position at all the times.

The splitter dampers to be provided at the junction of each branch duct with main duct and

split of main duct. The dampers shall be two gauges heavier than the gauge of the large

duct and shall be rigid in construction.

The dampers shall be of splitter, butterfly or louver type. The damper blade shall not be less

than 1.25mm. The frame shall be reinforced with 25mm angles 3mm thick along any

unsupported side longer than 250mm. Angles shall not interfere with the operation of

dampers, nor cause any turbulence. Automatic and manual volume opposed blade dampers

shall be complete with frames and bronze bearings as per drawings.

Wherever required for system balancing, a volume balancing opposed blade damper

with quadrant and thumb screw lock shall be provided.

After completion of the duct work, dampers are to be adjusted and set to deliver air flow as

specified on the drawings.

4.2 FUSIBLE LINK TYPE FIRE DAMPERS

All supply air Ducts coming out of ductable split units shall be provided with approved

make fire dampers of at least 120 minutes fire rating certified by CBRI Roorkee as per

UL555:1995. Fusible link shall melt at a temperature of 60 Deg. C.

The fire dampers shall be factory fabricated made out of high quality galvanized steel sheet.

The outer frame shall be formed of 16G galvanized steel sheets and the blades shall be

formed of 18G mm galvanized steel sheets.

The damper blade shall be pivoted on both ends using chrome plated spindles in self-

lubricating bushes. Stop seals shall be provided on top & bottom of the damper housing

made of 16G Galvanized steel sheet. For preventing smoke leakage side seals will be

provided.

The fire Damper shall be mounted in fire rated duct sleeve min. 600 MM long. The sleeve

shall be factory fitted on fire damper. The joints at sleeve end shall be slip on type.

Minimum thickness of GI Sheet shall be 18G. The damper shall be installed in accordance

with the installation method recommended by the manufacturer.

Hinged access doors of suitable size complete with air tight gaskets shall be provided in all

fire dampers & plenums.

5.0 INSTALLATIONS

5.1 The duct fabrication & installation shall generally conform to I.S. 655-1963.


5.2 The contractor shall provide and neatly erect all sheet metal work or as may be required to

carry out the intent of these specifications and this shall meet with the approval of the

Engineer in all its parts and details.

5.3 All necessary allowances and provisions shall be made by the contractor for beams, pipes or

other obstructions in the building. Where necessary to avoid beams or other structural

work or plumbing or other pipes or conduits the ducts shall be transformed, divided or

curved to one side, as approved or directed by the Engineer.

5.4 All metal work in dead or furred down spaces shall be erected in time to cause no delay to

other contractors in the building.

5.5 Ducting over furred ceiling shall be supported from the slab above, or from beams. In no

case shall a duct be supported from the ceiling hangers or be permitted to rest on a hung

ceiling.

5.6 If a duct cannot be run as decided, the Contractor shall install the duct between the

required point by any path available, subject to the approval of the Engineer.

5.7 All ducts shall be rigid and shall be adequately supported and braced where required with

standing beams, tees or angles of ample size to keep the ducts true to shape and to prevent

buckling, vibration or breathing.

5.8 All joints shall be made tight and all interior surfaces shall be smooth. Bends shall be made

with radius not less than ½ the width of the duct or with scientifically designed interior

curved vanes, as approved. The vanes shall be so spaced that the aspect ratio of each of

the individual elbow formed by the vanes will be about five.

5.9 All sheet metal connections, partitions & plenums required to confine the flow of air to and

through the filters and fans shall be constructed of 18 G galvanized Iron thoroughly

stiffened with 1” x 1” angle Iron braces and fitted with all necessary doors as required by the

Engineer, to give access to all parts of the apparatus. Doors shall be not less than 18” x 20”

in size.

5.10 Where metal ducts or sleeves terminate in wood work, brick or masonry openings, tight

joints shall be made by means of closely fitted heavy flanged collars.

5.11 Air handling units shall be connected to duct work by inserting at air inlet and air outlet a

double canvas sleeve. Each sleeve shall be minimum 4” long securely bonded and bolted to

duct and units. Each sleeve shall be made smooth and the connecting duct work rigidly

held in line with unit inlet or outlet.


C. PIPING

1.0 SCOPE

The scope of this section comprises the supply & laying of all pipes required for this project.

On the award of the contract, the tenderer shall prepare their, own detailed working

drawings.

2.0 CHILLED WATER PIPING

2.1 All chilled water piping and fittings shall be of M.S. heavy duty Class `C’ only. The pipe

confirming to BIS 1239 for pipe size upto 150 mm dia. and for pipe size 200 mm dia. and

above shall be as per BIS 3589 having minimum 6 mm thickness. All joining in piping shall

generally be by welding unless otherwise mentioned or as directed at site. All welding shall

be done by qualified welders and shall strictly confirm to Indian Standard code of

procedure for manual metallic welding of mild steel as per BIS 823.

2.2 The piping shall be so designed that the water velocity through the piping shall not exceeds

maximum 8 fps and also the piping friction drop shall be limited to 4 m per hundred meter

of pipe length.

Pipe threads shall be of I.S. 554/1955 and flanges of I.S. 1536/1960.. Pipes shall be sloping

towards drain points.

2.3 Fittings shall be new and from standard manufacturers. Fittings shall be malleable casting

of pressure ratings suitable for the piping system. Fittings used on welded piping shall be

of the weldable type. Flanges shall be new and from standard manufacturers. Supply of

flanges shall include bolts, washers etc. as required.

2.4 Tee-off connections shall be through reducing tees, wherever possible. Otherwise ferrules

welded to the main pipe shall be used.

2.5 All equipment and valve connections or connections to any other mating pipes, shall be

through unions/screwed flanges upto 50 mm dia. And flanges (welded or screwed for G.S.)

for larger diameters or as required for the mating connection.

2.6 All welded piping is subject to the approval of the Engineer and sufficient number of

flanges and unions shall be provided as required under.

2.7 All the drain piping shall be of G.I. ‘C’ class of TATA/Jindal/SAIL make with the Insulation as

specified in the ‘Insulation’

3.0 VALVES

3.1 BUTTERFLY VALVES

Butterfly valves shall be of slim seal, short wafer type with standard finish shall be suitable

for mounting between flanges drilled to ANSI 125. The valve body shall be of cast iron /

Ductile Iron. The disc shall be of quality ductile iron with epoxy coated finish or equivalent

quality material. The disc shaft consists of SS-420 or equivalent material, pivot and driving

stem. The disc shall move in bearings on both ends with ‘O’ Ring to prevent leakage. The

seat shall be molded black EPDM / Nitrile rubber. The valve operation shall be with flow

control lever and notches up to dia of 250mm and shall be with gear for 300mm and above.

The body shall be short wafer type up to 250mm dia and shall be flanged / lugged type for

the valve equal to and above 300mm dia. The valves shall be suitable for a working pressure

of 16kg/cm².


3.2 GATE VALVES

All gate valves and check valves shall be of Forged Brass / Bronze body, non rising stem,

screwed / flanged for up to 100mm dia. All such valves shall be supplied with I.S.I marking

and certification. The valves shall be suitable for a working pressure of 16kg/cm².

3.3 BALL VALVES

The ball valve shall be of full bore design. It shall have body of carbon steel / Forged brass /

bronze. The ball and the shaft shall be of stainless steel / chrome plated. The seat shall be

of PTFE. The valve shall be complete with socket weld ends. The valves shall be suitable for

a working pressure of 16kg/cm².

3.4 DUAL PLATE CHECK (NON-RETURN) VALVES

Check valves shall be of short wafer type with Dual plates and with standard finish shall be

suitable for mounting between flanges drilled to ANSI 125. The valve body shall be of Cast

Iron / Ductile Iron or equivalent. The disc plate shall be of Alu-bronze / SS 316 / Equivalent.

The shaft, hinge pins, springs shall be of SS 316 or equivalent. The seat shall be EPDM /

Buna-N. The check valves shall be suitable for a working pressure of 16kg/ cm².

3.5 MOTORIZED 2-WAY MODULATING CONTROL VALVE

The Control valves from 10 to 50mm dia shall be with thread / flange connections. The

body shall be of Red Brass / Copper Alloy / Bronze. It is with stainless steel stem and brass

plug, spring load self adjusted packing. The stroke shall be of 20mm and the range ability of

50:1, with low seat leakage rate of less than 0.1% of kvs. The valve shall be suitable for

Electric/Electronic actuator. The valve shall be suitable for temperature range of 2⁰C to

120⁰C and also to be suitable for a working pressure of 16kg/ cm².

The Control valves above 50mm dia shall be with flanged connections. The body shall be of

Ductile Iron / Cast iron. It is with stainless steel stem and pressure balanced plug, spring

load self adjusted packing. The stroke shall be of 20mm and the range ability of 50:1, with

low seat leakage rate of less than 0.1% of kvs. The valve shall be suitable for

Electric/Electronic actuator. The valve shall be suitable for temperature range of 2⁰C to

120⁰C and operating pressure of 16kg/ cm².

The Actuator shall be of heavy duty and robust construction of spring return type with

spring return time of around 15seconds. It shall be of corrosion resistant design housed in

IP54 class protection. It shall be with manual operation knob, position feedback signal, 0 to

10V or 2 to 10V DC input signal selectable, Direct or Reverse action selectable, Stroke

position on signal failure selectable. The actuator shall be suitable for operating

temperature of 0⁰C to 60⁰C, 5 to 95% RH and at 24 ±5%V, 50 Hz AC power supply.

Necessary step down transformer with proper enclosure is the scope of HVAC contractor.

The actuator shall be suitable for hook to BMS system for remote control operation to work

based on the BMS commend and shall also be able communicate the position feed back to

the BMS system.

The unit shall be provided with necessary Electronic Temperature controller. It shall be of

wall mounted / Duct mounted (with extended sensor) type as required for the project and


of easy operable type. It shall have an accuracy range of 0.1⁰C. It shall have a set point

range of 10⁰C to 50⁰C (internal temperature sensor) and set point range of -20⁰C to 110⁰C

(external temperature sensor). It shall be provided with LCD for display with functional key

for settings. It shall be suitable for operating temperature of 0⁰C to 60⁰C, 5 or 95% RH and

at 24 ±5%V, 50 Hz AC power supply. It shall able to provide analog output of 0 to 10V DC

or 4 to 20mA field selectable. It shall be housed in an aesthetic enclosure of protection class

of not less than IP 30 for indoor application. For outdoor application it should be of IP55 or

housed in IP55 in closure with necessary access provision.

Wherever individual room area with individual cooling / heating unit provided and the

controller kept inside the room for personal operation, it shall be provided with additional

energy saving mode settings with external input from card key overrides the temperature

settings to user defined heating and cooling temperature. It shall be also with on / off

switch and 3speed fan selector switch. The Temperature controller sample shall be provided

to the Architect / PMC for approval for aesthetic before supply of the same.

The cost of the valve shall be inclusive of all Valve, Actuator, Thermostat and necessary

control cabling etc. The cost shall be inclusive of necessary power & control cabling

between nearby main power source to the valve, and to the thermostat to the valve etc.

3.6 ”Y”-STRAINERS

“Y” strainers up to 50 mm shall be of gunmetal and above 50 mm shall be of cast iron / MS

plate body. Strainers shall incorporate a removable bronze screen with 3mm perforations

and a permanent magnet. It shall be provided with flanges and suitable drain port with

valve. They shall be designed to enable blowing out the accumulated dirt and facilitate

removal / replacement of screen without disconnecting the main pipe. The ‘Y’-strainer shall

be suitable for a working pressure of 16kg/ cm².

3.7 PRESSURE GAUGES

Pressure gauges shall be not less than 150 mm dia. They shall be selected for appropriate

range and shall be complete with siphon and cock, needle valve etc. The body shall be of

stainless steel/brass/bronze of IP 55 protection.

3.8 DIAL TYPE THERMOMETER

Thermometer shall be of bourdon dial type gauges shall be not less than 150 mm dia.

Thermometer shall be provided with stainless steel/brass/bronze body of IP 55 protection. It

should be provided with SS/brass/bronze thermo well fixed on the chilled water pipe.

3.9 AUTOMATIC AIR VENTS

It should be of compact & efficient design made of Brass construction to efficiently remove

air pockets from hydraulic systems with a maximum working pressure of 4-6 bars &

working temperature of 120 deg C. The air vent shall be of 10mm dia for the AHUs and for

the pipe up to 150mm dia, and 15mm dia for other areas. The air vents shall be provided

with additional ball valves. The air vent shall be connected with necessary Copper / GI tubes

and left to the nearest waste drain point / pipe.


4.0 PIPING INSTALLATION

4.1 Pipe runs and sizes should to meet the site conditions. The contractor on the award of the

work shall prepare detailed working drawings, showing the cross section, longitudinal

sections, details of fittings, locations of isolating, drain and air valves etc. They must keep in

view the specific openings in buildings and other structures through which the pipes are

designed to pass.

4.2 Piping shall be properly supported on or suspended from strands, clamps, hangers etc. as

specified and as required. The tenderer shall adequately design all the brackets, saddles,

clamps, hangers etc. and be responsible for their structural integrity.

4.3 Pipe supports shall be of steel, adjustable for height and prime coated with rust preventive

paint and finish coated black. Where pipe and clamp are of dissimilar material, a gasket

shall be provided in between.

Spacing of pipe supports shall not exceed the following:

Pipe bore dia

(mm)

Spacing

(M)

Up to 12 1.22

19 to 25 1.83

32 to 150 2.44

150 and above 3.05

Pipe hangers shall be fixed on walls and ceilings by means of metallic drawl plugs or

approved shear fasteners.

4.4 Vertical risers shall be parallel to wall and column lines and shall be straight and plumb.

Risers passing from floor to floor shall be supported at each floor by clamps or collars

attached to pipe and with a 12 mm thick rubber pad or any resilient material. Where pipes

pass through the terrace floor, suitable flashing shall be provided to prevent water leakage.

Risers shall also have a suitable elbow or concrete pipe support at the lowest point.

4.5 Pipe sleeves of 50 mm diameter shall be provided wherever pipes pass through walls and

the annular space filled with felt and finished with retaining rings.

4.6 Insulated piping shall be supported in such a manner as not to put undue pressure on the

insulation.

4.7 Cut-outs required in the floor slabs for taking the various pipes are provided. Tenderers

shall carefully examine the cutouts provided and clearly point out wherever the cutouts do

not meet with the requirements.

4.8 Piping work shall be carried out with minimum disturbance to the other work on the site. A

program of work shall be chalked out in consultation with the Engineer.


4.9 All pipes using screwed fittings shall be accurately cut to the required sizes and threaded in

accordance with I.S. 554/1955 and burrs removed before laying. Open ends of the piping

shall be blocked as the pipe is installed to avoid entrance of foreign matter. Wherever

reducers are to be made in horizontal runs, eccentric reducers shall be used if the piping is

to drain freely; in other locations, concentric reducers may be used.

4.10 Drains shall be provided at all low points in the piping system and shall be of the following

sizes:

Mains

(mm)

Drain

(M)

Upto 300 mm 25 mm

Over 300 mm 40 mm

Drains shall be provided with gate valves of equal size with rising spindle. Drains shall be

piped through equal size G.I. pipe to the nearest drain or floor waste. Piping shall be

pitched towards drain points.

5.0 INSULATION

Pipes shall be insulated in accordance with specifications in section `INSULATION’.

6.0 VIBRATION ELIMINATION

Piping installation shall be carried out with vibration elimination fittings wherever required.

7.0 TESTING

7.1 All piping shall be tested to hydrostatic test pressure of at least 1½ times the maximum

operating pressure, but not less that 7 Kgs/Sq.Cm. for a period of not less than 24 hours.

All leaks and defects in joints revealed during the testing shall be rectified to the

satisfaction of the Engineer.

7.2 Piping repaired subsequent to the above pressure test shall be retested in the same

manner.

7.3 System may be tested in sections and such sections shall be securely capped.

7.4 TNPL shall be notified well in advance by the Contractor of his intention to test a section or

sections of piping and all testing shall be witnessed by the Engineer or his authorized

representative.

7.5 The contractor shall provide all materials, tools, equipment, instruments, services and

labour required to perform the test and to remove water resulting from cleaning and/after

testing.

7.6 The contractor shall make sure that proper noiseless circulation of fluid is achieved through

all coils and other heat exchanger in the system concerned. If proper circulation is not

achieved due to air bound connections, the Contractor shall rectify the defective

connections. He shall bear all the expenses for carrying out the above rectifications,

including the tearing up and re-finishing of floors, walls, etc. as required.


7.7 No insulation shall be applied to piping until after the completion of the pressure testing to

the satisfaction of the Engineer.

8.0 PAINTING

8.1 After all the piping has been installed, tested and run for at least 10 days of eight hours

each, the piping shall be given two finish coats, as follows:

----------------------------------------------------------------------------------------------

Service Flow Color

----------------------------------------------------------------------------------------------

Chilled water supply/return as approved by the Engineer

====================================================

8.2 The direction of flow of fluid in the pipe shall be visibly marked in White arrows.


D. INSULATION

1.0 SCOPE

The scope of this section comprises the supply and application of insulation as herein

specified.

2.0 COLD INSULATION

2.1 All pipes, ducts & equipments operating at temperature lower than the ambient shall be

insulated in the manner specified hereinafter.

2.2 The insulating material shall be as follows:

The insulation for chilled water piping shall be carried out from flexible pipe sections sheets

of closed cell elastomeric insulation having a ‘K’ valve of 0.037 W/m⁰K at a mean

temperature of 20ºC and a minimum density of 55 Kg/m³. The thickness of insulation shall

be 25 mm upto 40 mm pipe dia and 32 mm for above 40 mm dia pipes.

2.3 No insulation shall be applied on pipes until the pipes are satisfactorily tested.

2.4 Pipe insulation shall be applied as follows:

a) Pipes shall be thoroughly cleaned with wire brush and rendered free from all rust and

grease.

b) Apply preferred synthetic adhesive by manufacturer over the pipes and insulation.

c) Insulation shall be fixed tightly to the surface taking care to seal all joints and covered with

same material tape to avoid condensation over the pipes and insulation.

e) The pipe insulation shall be covered with 26 Gauge Aluminium Cladding with superior

workmanship.

2.5 All valves, fittings, strainers etc. in chilled water piping shall be insulated to the same

thickness as specified for the main run of piping. Valve bonnets, yokes and spindles shall be

insulated in such a manner as not to cause damage to insulation when the valve is used or

serviced.

2.6 THERMAL INSULATION OF SHEET METAL DUCTING

2.6.1 Thermal insulation of the sheet metal ducting shall be done in any one of the following

insulation & methods, as asked in the tender BOQ and specifications and as given in the

tender drawings.

2.6.2 Thermal Insulation of ducting with Closed Cell Elastomeric Foam

Thermal insulation of ducting shall be done with 6/9/13/16/19/22/25mm thick Closed Cell

Elastomeric Foam structure of density 55 to 90 kg/m³ as per ASTM-D-1667., of Class ‘O’

insulation material. Apply one coat of adhesive on the outer surface of the sheet metal

ducting and one coat of adhesive on one surface of the insulation material allow it to dry


for 1minute and stick the insulation on the sheet metal ducting by pressing neatly such a

way that any formation rupture or buckle should be prevented. And the joints shall be

sealed with 50x3mm of self adhesive nitrile rubber tape.

General recommended thickness of Closed Cell Elastomeric Foam shall be as follows:-

TYPE OF DUCT APPLICATION THICKNESS OF

INSULATION

S.Air duct passing through air-

conditioned area: 9mm thick.

S.Air duct passing through non

air-conditioned area (indoor):- 19mm thick.

S.Air duct passing through non

air-conditioned area (outdoor): 25mm thick.

R.Air duct passing through air-

conditioned area:- 6mm thick.

R.Air duct passing through non

air-conditioned area (indoor): 13mm thick.

R.Air duct passing through non

air-conditioned area (outdoor): 25mm thick.

2.7 ACOUSTIC INSULATION FOR DUCT

Ducts so identified and marked on drawings and included in Bill of Quantities shall be

provided with acoustic lining of thermal insulation material for a distance of minimum 6

meters from the equipment outlet as follows:

Duct acoustical insulation shall be 19mm thick open cell elastomeric nitrile rubber with class

‘1’ FRR insulation with corrugated surface facing air path and flat surface stuck to the inside

duct surface facing as specified or shown on the drawings.

Application: Clean the inner surface of the ducts with wire brush to remove dirt, dust etc.,

Pre-cut the insulation to the size desired, and allowing 50 mm excess at downstream joints.

Apply manufacturer recommended synthetic rubber adhesive on the surface of duct and fix

the insulation with pressure. Seal all longitudinal joints with tape. Impale insulation through

the bolts and assure insulation is stuck to the adhesive.

All adhesives used to stick insulation shall also be non-flammable. The adhesive shall be

strictly as recommended by the insulation manufacturer.


TECHNICAL DATA SHEET

CHILLED WATER TYPE AIR HANDLING UNIT TECHNICAL DATA SHEET

Project:- Date:-

Sl.

No. DESCRIPTION TECHNICAL DATA

A General

1 AHU Location & Purpose

2 AHU Type

3 AHU Make

4 Country of Origin.

5 Cooling Capacity - TR

6 Air Flow capacity - m³/hr &

CFM

7 External Static Pressure-Pascal.

8 Total Static Pressure-Pascal.

9 AHU outlet Velocity - m/sec.

10 AHU outlet location

11 Over all Dimensions

(L x W x H) - mm.

12 Total weight - Kgs.

13 Total Operating weight - Kgs.

14 Noise level at 1m. Distance

from AHU - dBA.

B Construction Features

1 Outer skin material &

Thickness

2 Inner skin material & Thickness

3 Insulation material, Thickness

& Density.

4 Drain Pan Material &

Thickness.

5 Access Door for fan Section

(Yes/No)

6 Access Door for Filter Section

(Yes/No)

C Fan Details

1 Fan Make

2 Fan Type

3 Country of Origin

4 Fan Air flow - m³/hr & CFM

5 Design Static Pressure-Pascal

6 Fan Outlet Velocity - m/sec.

7 Casing Material & Thickness.

8 Impeller Material & Thickness.


9 Blade Material & Thickness.

10 Type of Bearing

11 Make of Bearing.

12 Type of Drive

13 Fan RPM.

14 Fan BHP. - Kw.

15 Fan Static Efficiency - %

16 Fan Total Efficiency - %

17 Statically & Dynamically

Balanced (Yes / No)

18 Attach Fan Performance

Curve

19 Operating Weight of the Fan.

20 Fan noise level at 1m distance

– dBA

21 63hz.

22 125hz.

23 250hz.

24 500hz.

25 1000hz.

26 2000hz.

27 4000hz.

28 Max. Fan speed - RPM.

29 Max. Fan Absorbed Power-Kw.

D Motor

1 Electrical Characteristic

2 KW of Motor - Kw.

3 Motor Efficiency - %

4 Make

5 Type

6 Motor RPM.

7 Mounting type

8 Class of Insulation

9 Class of Protection - IP

10 Full Load current FLA (Amps)

11 Starting current (Amps)

12 Locked rotor current on full

load (Amps)

13 Weight of the motor - Kg.

E Pre-Filters

1 Pre-filter Class.

2 Type

3 Make

4 Country of Origin

5 Filter Media.

6 Type of fixing.


7 Air Face Velocity across filter-

m/sec.

8 Air Pressure drop at Clean &

dirty - mm. of WC.

F Fine Filters

1 Fine filter Class.

2 Type

3 Make

4 Country of Origin

5 Filter Media.

6 Type of fixing.

7 Air Face Velocity across filter-

m/sec.

8 Air Pressure drop at Clean &

dirty - mm. of WC.

G Cooling Coil Section

1 Tube Material

2 Tube Dia - mm.

3 Tube wall Thickness - mm.

4 No. of rows.

5 Fin material & Thickness.

6 Fin spacing.

7 Coil Area - m²

8 Air Velocity Across coil -

m/sec.

9 Coil Inlet Water Temp - ºC

10 Coil Outlet Water Temp - ºC

11 Water Flow - m³/hr.

12 Entering Air Db & Wb temp-

ºC

13 Leaving Air Db & Wb temp -

ºC

14 Total Cooling Capacity of the

coil – TR

15 Sensible Cooling Capacity of

the coil – TR

16 Test Pressure – Kpa

H GENERAL

1 Suitable for VFD drive (Yes /

No)

2 Marine Lamp (Yes / No)

3 Access Door Limit Switch (Yes /

No)

4 Base frame for Fan & Motor

(Yes / No)


5 Type of Vibration isolators.

6 Drive set (Yes / No)

7 Commissioning Filters

(Yes/No)

8 Attach GA. Drawing

9 Factory Test Certificate

provided (Yes / No)

10 Factory Inspection (Yes / No).

BUTTERFLY VALVE - TECHNCIAL DATA

Project:- Date:-

Sl.No: DESCRIPTION TECHNICAL DATA

1 Make

2 Country of Origin

3 Valve Type

4 Model No.

5 Valve Dia – mm

6 Kvs. Value - m³/hr @ 1bar pressure.

7 Type of connection

8 Body Material

9 Stem Material

10 Disc Material

11 Liner Material

12 External coating

13 Fluid Temperature Range - ºC

14 Pressure Rating – PN

15 Operating with handle (Yes / No)

16 Operating handle material

17 Operating with Gear (Yes / No)

18 Attach Catalogue & Drawing

BALL VALVE - TECHNCIAL DATA

Project:- Date:-


1 Make

2 Country of Origin

3 Valve Type

4 Model No.

5 Valve Dia – mm



8 Body Material

9 Ball Material

10 Handle Material

11 Liner Material





Y'-STRAINER- TECHNCIAL DATA

Project:- Date:-


1 Make

2 Country of Origin

3 Model No.

4 Dia – mm



7 Body Material

8 Strainer Material

9 Dia-mm and % of perforation

10 Permanent Magnet Provided (Yes/No)

11 Drain port with valve provided

(Yes/No)




THERMOMETER & PRESSURE GAUGE - TECHNCIAL DATA

Project:- Date:-


THERMOMETER

1 Make

2 Country of Origin

3 Type

4 Dia – mm

5 Material of construction.

6 Temperature Range - ºC

7 Thermo well material.



PRESSURE GAUGE.

1 Make

2 Country of Origin

3 Type

4 Dia – mm

5 Material of construction.

6 Pressure measuring Range - kg/cm²

7 Needle valve provided (Yes/No)




ACOUSTIC INSULATION MATERIAL - TECHNCIAL DATA

Project:- Date:-


1 Material of Insulation

2 Insulation Make

3 Country of Origin

4 Density of Material

5 Thermal Conductivity at 0ºC in w/mºC




9 Type of Cell Structure

10 Type of Bonding

11 Moisture absorption rating

12 Class of Fire rating.

13 Not Allow microbial growth (Yes/No)

14 Should not cause or accelerate Corrosion

and Odor Emissions (Yes/No)

15 Covering material details

16 finishing material details

17 Attach catalogue.

THERMAL INSULATION OF SHEET METAL WORKS - TECHNCIAL DATA

Project:- Date:-



2 Insulation Make

3 Country of Origin







10 Type of Bonding


12 Water Vapor Permeability - kg / Pa.m.s

13 Moisture Resistance factor – μ





17 Type & Detail of finish for Indoor

application.


18 Type & Detail of finish for Outdoor

application.


THERMAL INSULATION OF CHILLED WATER PIPES - TECHNCIAL DATA

Project:- Date:-



2 Insulation Make

3 Country of Origin







10 Type of Bonding


12 Water Vapor Permeability - kg / Pa.m.s

13 Moisture Resistance factor – μ





17 Type & Detail of finish for Indoor piping.

18 Type & Detail of finish for Outdoor piping.


VOLUME CONTROL DAMPER - TECHNCIAL DATA

Project:- Date:-


1 VCD Make

2 VCD Type

3 Country of Origin

4 Outer Casing Material & Thickness in MM.

5 Blade Leaf Material & Thickness in MM.

6 Blade shape

7 Shaft material & size.

8 Bush material

9 Operation through Gear / Linkages

10 Open & Close indication provided (Yes

/No)

11 Type of Finish.

12 Attach Manufacturer catalogue.


FIRE DAMPER with FUSIBLE LINK - TECHNCIAL DATA

Project:- Date:-


A Fire Damper

1 Make

2 Country of Origin

3 Outer Casing Material & Thickness in MM.

4 Blade Leaf Material & Thickness in MM.

5 Blade Linkage material

6 Blade operation type

7 Open & Close indication provided (Yes /No)

8

Extended Sleeve with necessary linkage

provided to offset the fixing of the Actuator

from the axis of damper to avoid the

actuator located inside the wall. (Yes/No)

9 Type of Finish.

10 Fusible linkage fusing temperature.

11 UL-Certified (Yes / No)

12 Attach Manufacturer catalogue & Fixing

arrangement Drawings.


LIST OF RECOMMENDED MAKES OF MATERIAL

Sl. No: MATERIAL RECOMMENDED MAKES.

1 Air Handling units Luftek / Edgetech / Zeco /

Citizen

2 Power cable Finolex / KEI / Poly cab

3 MS Pipe up to 500mm dia. TATA / Jindal

4 Butterfly Valve Audco / Advance / Saunder /

Honeywell / Danfoss.

5 Balancing Valve - (Semi Automatic Type) TA Hydronics / Honeywell /

Hattersly.

6 "Y" - Strainer Sant / Emerald.

7 Dial Type Pressure Gauge Warree / Hguru / Foebog / AMI

8 Dial Type Thermometer Waree / Artherm / Hguru

9 Ball Valve Audco / Danfoss / RB Italy / Neta

/ Leader

10 Drain pipe Astral / Finolex / Ashirvad

11 GI Sheet TATA / Jindal / Sail

12 Acoustic insulation for ducts Armaflex / K-Flex/ Supreme

13 Thermal insulation for ducts Armaflex / K-Flex/ Supreme

14 Fire damper Cosmic / Caryaire / Ravistar /

Airmaster.

15 Fresh air Louvers Cosmic / Caryaire / Ravistar /

Airmaster.

16 Automatic Airvents Anergy / Emeralad or Equivalent

17 Test Point Anergy / Emeralad or Equivalent

18 GI Volume control Dampers Caryaire / Ravistar / Airmaster.

19 Fiberglass Kimmco / UP Twiga /

Owenscorning


BILL OF QUANTITIES

BOQ FOR AHU MODIFICATION WORK AT TNPL,CHENNAI

Sl.

No. DESCRIPTION UNIT QTY

RATE - RS. AMOUNT - RS.

SUPPLY ERECTION SUPPLY ERECTION

1 Air Handling Units - Floor Mounted Units

Supply at site and erection of double skin draw

through type air handling unit suitable for

vertical/horizontal type air handling unit with 50mm

thick prefilter, chilled water cooling coil, fan sections

with EC fan and suitable IE4 fan motor, 25mm thick

double skin duly sandwiched with PUF and with

thermal bridging having 48Kg/m³ outer skin made

out of 0.63mm GI preplasticised and inner skin of

0.63mm prepainted complete with

backward/forward curved centrifugal fan having

efficiency more than 70%, cooling coil shall having 5

fins per cm, provision of prefilter section with set of

washable prefilters having efficiency of 90% down

to 10 microns and insulated SS drain pan. The unit

shall have insulated drain tray with drain line outlet

provision. The drive unit comprising of TEFC Class F

motors suitable for 415 ± 10% volts, 50 Hz, AC

supply and high efficiency (IE-4). Filter face velocity

shall not more than 2.25 mps and fan outlet velocity

shall not to exceed 8 mps. Sound level at 1 m

distance not exceeding 65 dBA. The unit should

comply as per the specifications.

a 27.0TR - 10800CFM - 40mm ESP - 6RD Nos 5

b 14.0TR - 5600CFM - 30mm ESP - 6RD Nos 4

c 12.0TR - 4800CFM - 30mm ESP - 6RD Nos 1

d 8.0TR - 3200CFM - 30mm ESP - 6RD Nos 8

2

Dismantling of existing single skin AHU’s from

various floors of the building and kept at TNPL

store.

a 25.0TR Nos 5

b 7.5TR Nos 11

c 5.5TR Nos 7

3

Dismantling of existing single skin AHU’s from

various floors of the building and taken as scrap

and reimbursement to TNPL.

a 25.0TR Nos 5

b 7.5TR Nos 11

c 5.5TR Nos 7

4 Replacement of cooling coil

Supply and erection of DX-type cooling coil suitable

for existing 7.5TR packaged & ductable splits

approximately 6 sqft area single circuit with 4 row

coil. Cooling coil should comply as per existing

equipment manufacturer specifications. Successful

contractor shall take actual measurement of cooling

coil before manufacturing.

Nos 9


Sl.




5 Power Cable

4C x 6Sq.mm Armoured Aluminium cable for power

and 8 SWG copper wire for earthing between the

above panel to motor. Cable size shall be as per

motor manufacturer recommendations.

Rmt Ro

6 CHW Piping with Insulation

Supply and installation of MS 'C' Class pipes to

meet IS:1239 & 3589 of standard wall thickness cut

to required lengths and installed with all welded

joints. Providing and fixing in position the necessary

fittings like flanges, elbows, tees, reducers, MS

supports hanging arrangements including vibration

isolation arrangements etc. Price shall be inclusive

of nitrile rubber insulation with 26G GI cladding.

a 50mm with 32mm thick insulation Rmt 90

b 40mm with 25mm thick insulation Rmt 10

c 32mm with 25mm thick insulation Rmt 80

7 Butterfly valves

Providing and fixing in position wafer type Butterfly

valves with Nitrile Rubber lining and Epoxy coated

Disc complete with companion flanges, nuts, bolts,

gaskets etc. as required with pressure rating of

PN16 for chilled water application. The quoted price

shall be inclusive of class 'O' Nitrile rubber

insulation with self or synthetic adhesives.

a 50mm Nos 8

b 40mm Nos 2

c 32mm Nos Ro

8 Balancing valve

Providing and fixing in position the balancing valves

of PN16 rating complete with companion BS10 slip-

on flanges as per the specifications. The quoted

price shall be inclusive of class 'O' Nitrile rubber

insulation with self or synthetic adhesives.

a 50mm Nos 4

b 40mm Nos 1

c 32mm Nos Ro

9 Y - Strainer

Providing and fixing of Y-strainer complete with

PN16 rating with BS10 slip-on flanges, nuts and as

per detailed specifications. The quoted price shall

be inclusive of class 'O' Nitrile rubber insulation with

self or synthetic adhesives.

a 50mm Nos 4

b 40mm Nos 1

c 32mm Nos Ro

10 Pressure gauges

Four Inch Dia dial type Pressure Gauges complete

with brass chromium plated with Syphon and Cock. Nos 36


Sl.




11 Thermometer

Four inch dial type Thermometers to be fitted in to

thermowell with glycol or glycerine. Nos 36

12 Ball Valves for AHU Drain

Supply and installation of Bronze Ball Valves to

PN10 with SS ball within PTFE lined housing and

insulated handle. The quoted price shall be inclusive

of class 'O' Nitrile rubber insulation with self or

synthetic adhesives.

a 25mm Nos 10

b 12mm Nos 8

13 Drain piping

Providing and fixing in position of UPVC pipes from

AHU to floor drain provided at AHU room for

condensate drain cut to required lengths and

installed complete with "U" trap all necessary

fittings like elbows, tees & reducers. The pipe shall

be insulated with 6mm of Nitrile rubber. The quoted

price shall be inclusive of Nitrile rubber insulation.

a 32mm Rmt 50

b 25mm Rmt 40

14 Auto Air vents valves

Automatic air Purge Valves at highest point of each

location for removal of air from the system. Nos Ro

15 Ducting (factory made)

Supply and installation of site fabricated ductwork,

Installation and Testing of sheet metal ducts

including elbows, turning vanes, neoprene / PVC

fire retardant gaskets slip on flanges, GI fully

threaded rods, GI slotted channel supports /

hangers etc, in accordance with the approved shop

drawings and specifications. Ducting shall also be

painted wherever grilles are provided. All the ducts

shall have reinforced flange regardless of size. Zinc

coating shall not less than 120 GSM.

a Upto 700mm (26 gauge) GSS Sqm 30

b 701mm-900mm (24 gauge) GSS Sqm 50

c 901mm-1200mm (22 gauge) GSS Sqm 25

d 1201mm-1800mm (20 gauge) GSS Sqm 30

e 1801mm and above (18 gauge) GSS for Plenum Sqm 75

16 Acoustic Insulation for ducts


Sl.




Supply and installation of acoustic insulation of

ducts with 19mm thick ARMASOUND nitrile rubber

insulation stuck to the surface of duct with nitrile

rubber synthetic rubber adhesive.

Sqm 230

17 Fusible link Fire Damper

Fire damper with fusible link and spring complete

with factory are made out of 1.6mm thick and 400

mm long, GSS sleeves suitable for 120 minute fire

rating complete with operating handle for supply

and return air openings on the wall as per the

approved shop drawings and specifications..

Sqm 8

SUB TOTAL FOR HVAC WORKS WITHOUT TAX

GST

GRAND TOTAL FOR HVAC WORKS WITH ALL TAX

specification for air handling units€¦ · road, guindy, chennai - 600 032 and delivered before...

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