JAMIA HAMDARD

(Hamdard University) HAMDARD NAGAR, NEW DELHI - 110062

TENDER DOCUMENT

FOR

PROVIDING & FIXING OF HEATING, VENTILATION &

AIRCONDITIONING WORK FOR RABIA MASJID, JAMIA HAMDARD

NOTICE INVITING TENDER

Sealed item rate tenders are invited for the following job. The agency having sufficient experience of

such works and having TIN/WCT may only apply.

NAME OF WORK: PROVIDING & FIXING OF HEATING, VENTILATION & AIR CONDITIONING WORK FOR RABIA MASJID, JAMIA HAMDARD

Site / Location of Work:- At Jamia Hamdard Campus, New Delhi-110062.

Time Period for completion of work: - 15 days (fifteen) from the date of issue of the work order.

Estimated Cost:- Rs.14.90 Lakhs

EMD :- : Rs. 30,000.00 In favour of “Jamia Hamdard”.

The Tender Documents may be downloaded from the website of Jamia Hamdard and the sealed tenders

be deposited in the tender box kept at Purchase Section by 3:00pm on 04-05-2017. Tenders will be

opened on same day at 3:30pm in the office of the Sr. Consultant (E & M) basement of

Administrative Block. Bidders are also requested to be present at the time of opening of Tenders.

The bids may be submitted by the following categories of parties.

Contractors should have executed similar nature of work in prestigious institutional buildings,

Universities, Hospitals, etc, and produce credentials in support thereof.

The quantities given in the schedule are tentative and the actual quantities to be executed may vary

(+ or -). The total works have to be executed within 15 days from the approval of the design/sample

after issuing work order. Therefore, contractors with large and competent work force/resources need

only apply. Delay in execution of works shall attach liquidated damage charges as per CPWD

condition of contract.

Last date of submission of bid 04.05. 2017 (up to 3pm)

Date of opening of bids 04.05. 2017 (at 3:30 pm)

Time for completion 15 days

Requirements to be fulfilled:

Firm who have successfully carried out Air Conditioning Works in last 5 years ending March 2017

of the following: -

Three similar works costing not less than 40% each of the estimated cost i.e. not less than Rs.5.96 Lakhs.

Or

Two similar works costing not less than 60% each of the estimated cost i.e. not less than Rs.8.94 Lakhs.

Or

One similar works costing not less than 80% each of the estimated cost i.e. not less than Rs.11.92 Lakhs

i. Registration with CPWD, DDA, MES, Railways, PSUs.

ii. Electrical License of contractor.

iii. Registration of D-VAT.

iv. Registration with ESI, EPF.

v. Latest filed copy of D-VAT.

vi. Undertaking that the bidder has never been black listed.

vii. No subletting or subcontracting of the work will be permitted.

viii. The Company shall give an undertaking that they shall not employ minor workman.

ix. The Bidder has not been black listed by any of the Govt. Depts./Govt. Institutions etc.

during last three years.

1. The bidders shall attach copy of PAN Card.

2. Duly sealed tenders shall be dropped in the tender box placed at the Purchase Section, Basement

of Administrative Building, Jamia Hamdard. Each page should be duly signed by the contractor.

3. The conditional bids shall not be considered under any circumstances and rejected without any

notice or assigning any reasons thereof.

4. All bids once submitted shall be the property of Jamia Hamdard, and bidders will lay no claim

whatsoever on the same.

5. Jamia Hamdard, reserves the right to reject any or all the tenders in full or in part without

assigning any reasons whatsoever, and the decision of the University in this regard will be

binding on all the bidders. Jamia Hamdard, reserves the right to accept or reject any or all

tenders if not found as per norms .

6. No T & P shall be supplied by the University.

7. Taxes as applicable shall be deducted from the contractor’s bill as per Govt. of India rules.

8. Jamia Hamdard welfare fund charges will be deducted@0.25% of the amount of total billed

amount.

9. Security shall be deducted @ 5 % of value of work done. The same shall be released after the

expiry of defect and liability period of one year.

10. Successful bidders shall deposit an amount equal to 5% of the tendered and accepted value of

work in the form of Bank Guarantee as performance guaranty within 5days of issue of letter of

acceptance. This will remain till successful completion of work.

11. The time allowed for completion of work shall be 15days which shall be reckoned from the date

of issue of work order. Time allowed for the work shall be strictly followed and no delay

without any genuine reason will be accepted. A penalty of @ 1% per week subject to a 10% of

maximum of total value of the project will be imposed against delay. The decision of Engineer-

in-charge about the delay shall be final and binding.

12. No escalation in any form either of material or labour shall be payable by the University.

13. All materials brought at site shall be as per schedule of quantities (Annexure - A) and list of

specification at (Annexure - B) and will be strictly followed. The material shall be got entered in

the site book and approved by Engineer-In-charge before being used.

14. Mandatory tests have to be carried out as asked for by the Engineer-In-Charge. Nothing extra

shall be paid for such purpose.

15. Any violation of instruction/agreement or suppression of facts will attract cancellation of

agreement without any reference or any notice period.

16. The Engineer- in-Charge without prejudice to any other right or remedy against the contractor

which have either accrued or accrue thereafter to the Government, by a notice in writing to take

the part work / part incomplete work of any item(s) out of his hands and shall have powers to

take possession of the site and any materials, constructional plant, implements, stores, etc.,

thereon; and/or Carry out the part work / part incomplete work of any item(s) by any means at

the risk and cost of the contractor.

17. The tenderer shall be solely responsible for any accident/medical/health related

liability/compensation for the personnel deployed by it at Jamia Hamdard. The Jamia Hamdard

shall have no liability in this regard.

18. The personnel provided by the agency will not claim to become the employees of Jamia

Hamdard and there will be no Employee and Employer relationship between the personnel

engaged by the Agency and Jamia Hamdard.

19. No tent or hut shall be allowed to be put up for workers to stay within the campus. The

contractor is deemed to have inspected the site and thoroughly acquainted himself with the site

conditions, availability of storage space for materials etc.

20. The tenderer should take extra precaution to ensure that there is absolutely no damage to the

surrounding structure/existing system etc. If any damage made by agency, it will be got

repaired/replaced/rectified by the agency itself at no extra cost.

21. It may here be noted, that the entire staff and labour of the Agency will follow all the security

instructions issued by Jamia Hamdard, from time to time and these instructions may include the

provisions to make suitable barricades or temporary wall fence to ensure that the labour

confines itself to the area of the work ONLY. Serious action will be taken in case any of the

contractor’s workmen are found to be tampering with the Laboratory equipment and property of

the University. Suitable damages will be recovered from the contractor’s bills if anyone is found

to do so. All decisions of the Engineer-in Charge in respect of the same will be final and binding

on the contractor.

22. On completion of all work, Agency shall remove all surplus materials & leave the site in a

broom clean condition, failing which the same shall be done at Agency’s risk & cost.

23. The Agency shall ensure compliance of all statutory laws & bye laws of the central govt./ state

govt./Municipal authorities related to the employment of their staff and all obligations under

Minimum Wage Act, Workman Compensation Act, Provident Fund & Miscellaneous Provision

Act, Bonus Act & Contract Labour Act 1970 etc. Jamia Hamdard University will not be

responsible for such purposes in anyway.

24. Any claim, dispute or difference arising out of or in connection with this agreement and which

cannot be settled by mutual consultations, shall be referred to sole Arbitration or an Arbitrator to

be appointed by the Competent Authority of Jamia Hamdard. The decision of the Arbitrator

shall be final and binding between the parties as per the terms & conditions of the Agreement to

be executed on award of contract. The Arbitrator proceeding shall be governed by the

Arbitration and Conciliation Ordinance dated 26th March, 1996 and shall be conducted in

Delhi. The agreement drawn shall be subjected to the jurisdiction of the courts at Delhi. The

work shall be governed by CPWD general conditions of contract and CPWD works manual,

besides special conditions herein mentioned.

25. Shop Drawing: - The shop drawing for all works as required by Engineer-in-charge shall be

submitted in quadruplicate at no extra cost by the contractor and in the manner so required by

them. The contractor shall proceed with the works only after approval by the Engineer-in-

charge. Such drawings shall be coordinated with all disciplines of work.

GENERAL CONDITIONS FOR SUBMISSION OF TENDER

1. Submission of Tender:

Tenders should be submitted in sealed envelopes. The tender duly filled in should be sent to

above mentioned address either by post or hand delivered in the tender box kept in the

Purchase Section, Basement of Administration, Jamia Hamdard. Jamia Hamdard will not be

responsible for tenders lost in postal transit or otherwise. It should not be handed over to any

employee of the Jamia Hamdard. No tender shall be accepted later than the time schedule

specified above. Tender once submitted will remain with the Jamia Hamdard and will not be

returned to the bidder. Tender submitted without EMD will not be entertained.

2. Price Bid:

In this bid the bidder is required to quote his items rates/prices for the above said works “at

JAMIA HAMDARD.” in the schedule of work attached. Items rates should be filled in both i.e.

figure and words. The scope of work & technical specifications are provided at Annexure ‘A’, ‘B’

for your reference. The quoted prices shall be including all the taxes levied by statutory Govt.

bodies. It is mandatory on bidder to quote all items rate as asked for in the BOQ/ Schedule of

work. Failure to adhere to this condition may lead to rejection of tender. The bidders should quote

unconditional rates, neatly written without any overwriting and duly signed & stamped in all pages.

2.1 CONTRACTOR TO SATISFY HIMSELF ABOUT SITE CONDITIONS

Before tendering, the Contractor shall visit and examine the site and satisfy himself as to the

site conditions, the correct dimensions of the work and facilities. In case of any doubt, may be

clarified from the office of the Assistant Engineer (Electrical).

SCOPE OF WORK

3.1 SCOPE

The general character and the scope of work is illustrated and defined by the Schedule of

Quantities, drawings and Specifications herewith attached.

3.2 EXTENT

The Contractor shall carryout and complete the said work in all respect in accordance with the

contract, and with the directions to the satisfaction of the Engineer-in-charge.

4. TYPE OF CONTRACT

The Contract shall be an item rate contract. The Contractor shall be paid at the contract rates,

for the actual quantity of work carried out by him in accordance with the Contract documents

as measured.

5. SCHEDULE OF QUANTITIES

The quantities given in the Schedule of Quantities are provisional and are meant to indicate

the intent of the work and provide a uniform basis for tendering. The Contractor shall be paid

for the actual quantity of work executed by him in accordance with Contract Documents at the

contract rates. The quantities given in the Schedule of Quantities are provisional and are

meant to indicate the intent of the work and provide a uniform basis for tendering. The

Contractor shall be paid for the actual quantity of work executed by him in accordance with

Contract Documents at the contract rates.

6. PAYMENT OF CONTRACTORS BILL

First and Final payment will be made after satisfactory completion of the said work. Security

shall be deducted @ 5 % of value of work done. The same shall be released after the expiry of

defect and liability period of one year.

7. SCHEDULE OF RATES TO COVER ROYALTIES, RENTS, WAGES, PROVIDEND

FUND, AND CLAIMS.

The schedule of rates shall be deemed to include and cover the cost of all royalties and fees for

all articles process protected by letters, patent or otherwise in corporate in or used in

connection with the works, also all royalties, rents and other payments in connection with

obtaining materials of whatsoever kind for the works and shall includes an indemnity to Jamia

Hamdard which the contractor hereby give against all actions proceedings claims, damages

cost an expenses arising from the incorporation for the use on the works of any such articles

processes or materials. Octoroi or other municipal or local board charge, if levied on

materials, equipment or machineries to be brought to site and removed from site for use on

work or after completion of work, shall be borne by the contractor. The contractor should be

Registered for provident form and would be require to make the deductions on the salaries pay

to the workers and deposit the same to the concerned department.

8. SCHEDULE OF RATES TO COVER TAXES AND DUES.

No exemption or reduction of custom duties, excise duties sales tax, VAT or any part duties,

transport carriages, stamp duties or Central or State Government or other bodies including one

company or dues, Taxes or charges (from or of anybody including the company) whatsoever

will be granted or obtained all of which expenses shall be deemed to included in and cover by

the schedule of rates. The contractor shall also obtain and pay for all permits or other

privileges necessary to complete work. In case where Jamia Hamdard. Wishes to avail Tax

/duty exemptions as applicable to the contractors shall comply with the instructions from

Jamia Hamdard.

Final Bill:- Within one (1) months of submission of the Bill with the final satisfactory

completion certificate and as per the terms and conditions of the Contract.

Note: All Bills are required to be supported by Detailed Measurement Sheet and Analysis

of Rates for Extra Items and its approval along with the Bill. The Bills shall be submitted

in specified format which should indicate quantities executed in all RA Bills and

cumulative Quantities besides current bill quantities along with tendered

quantity/unit/rates. There may occur deviations from the above noted schedule of

payments in exigent circumstances.

Signature of Contractor with Seal

ANNEXURE - A

BOQ – FOR HVAC WORKS - RABIA MASJID, JAMIA HAMDARD, NEW DELHI

The unit rate for all equipment or materials shall include cost in RUPEES for equipment and materials including all taxes and duties and also including forwarding, freight, insurance and transport into Contractor’s store at site, storage, installation, and testing, balancing, commissioning and other works as required.

BILL OF QUANTITIES

HVAC WORKS FOR RABIA MASJID, JAMIA HAMDARD

MAKE- AS PER APPROVED MAKE: DAIKIN /BLUESTAR/CARRIER/HITACHI/VOLTAS

S. N. Description Unit Qty Rate (in

Rs.)

Amount

(in Rs.)

DUCTABLE SCROLL SPLIT UNITS:

1.0 DX Type Scroll Split Unit System

Supply of ceiling suspended ductable type Scroll split Air-conditioning unit With R-410a complete in all respect as required, comprising of following:

a Air cooled condensing unit consisting copper tube

aluminium finned condenser coil, air cooled by suitable size

low speed fan, all mounted in heavy gauge sheet steel

enclosure with protective painting with first charge of

refrigerant gas.

b Evaporating Unit consisting of copper tube aluminum

finned high transfer cooling coil, refrigerant distributor and

thermostatic expansion Valve along with blower, filters

and drain pan all in heavy gauge sheet steel metal

enclosure with protective painting.

1.1 Ductable Scroll Split Unit System

a) 16.5 TR Nos 2

b) 11.0 TR Nos 2

TOTAL OF PART - I -Including Tax

Part-II

2.0 Installation, Testing and Commissioning of air conditining System:

a) Installation, testing and commissioning of insulated liquid and suction copper refrigerant piping of adequate size along with necessary fittings to interconnect the

condensing unit and the evaporating units.

b) Providing and fixing M.S. structural support for condensing

unit with vibration isolator pad in-between support and

structure and vibration isolation suspender and pads for

evaporating units.

c) Complete electrical work for the above units including

interconnecting cabling/wiring from the MCBs near the

room units to outdoor units complete in all respect including

earthing.

SPLIT UNITS:

1.0 DX Type Scroll Split Unit System

Installation, testing and commissioning of ductable split air conditioning units complete in all respects comprising of following:

1 .1 Ductable Scroll Split Unit System

a) 16.5 TR (Double Circuit) Nos 2

b) 11.0 TR Nos 2

3 Refrigerant Piping Supply, Interconnecting refrigerant copper pipe work with

(13mm thick) closed cell EPDM tubular rubber insulation

between each set of indoor & outdoor units as per

specifications, all piping shall be properly supported with

saddle and clampls duly screwed on walls/roof along with

necessary fittings which are required to complete the

system as under.

a) 16.5 TR RM 55

b) 11.0 TR RM 55

4 Complete Electrical work for the above including supplying

and fixing inter connecting conducting cabling/ wiring from

outdoor units to indoor units and to the wired remote fitted

already provided at site) PVC insulated flexible multicore

copper cable (4 Core 6 Sqmm) for interconnecting indoor

units and out doors units for power supply and erthing as

required duly drawn in PVC conduit medium duty of not less

than 25mm dia including accessories as required and

supported on saddle and clamp on wall or roof duly screws

on rawl pugs as under and as specified by the manufacturer

with 63Amp MCCB isolator & TPN Boxes connected to main

panel.

a) 16.5 TR RM 95

b) 11.0 TR RM 135

5 Providing and fixing M.S. structural support for condensing unit with vibration isolator pad in-between support and structure and vibration isolation suspender and pads

Set 4

for evaporating units for Out Door units

6 Drain Piping

Providing and fixing of uPVC drain pipe of minimum 15 Kg /cm2 complete with 6 mm thick

nitrile rubber insulation sleeve, fittings, supports, valves as per specifications & drawings.

a) 25 mm RM 50

b) Drain Pump Nos RO

7 Ducting

Supplying, fabricating, installation, testing and commissioning of G.I sheet metal ducting

complete with supports, dampers, Vanes, links, levers, quadrants, gaskets, etc. as per specifications and drawings etc as required

a) 24 Gauge Sqm. 150

b) 22 Gauge Sqm. 60

8 Providing and fixing flexible double Convass Connection made out of Fire retardant convass cloth of approved quality and make. Set 4

9 Duct Acoustic Lining

Supply, installation and testing of acoustic lining with in supply and return air ducts as per the specifications. All ducts shown cross hatched on the approved shop drawings shall be provided with acoustic lining of fibre glass as per the specifications.

a) 25 mm thick Sqm. 60

10 Duct Insulation (With EPDM Rubber )

Supplying, installing, testing and commissioning of Thermal insulation of supply / return air

ducts using following thickness cold insulation using closed

Rubber)

a) 13mm Thick Sqm 150

11 Supply Fresh Air Louvers

a) Supply, installation, testing and commissioning of powder quoted extruded aluminum construction air louvers with bird screen and volume damper and Supply, installation, tesing and commissioning of GI sheet of 24 SWG gravity Fresh air louvers with bird screen. Sqm. 02

12 Volume Control Damper

Supply, installation, testing and commissioning of GI volume control duct damper complete with neoprene rubber gaskets, nuts, bolts, screws linkages, flanges etc, as per specifications and drawings of the following size. Sqm. 03

13 S/R Air Grilles

Supplying, fixing, testing and commissioning of of aluminum supply air grill with volume control dampers and return air grill without volume control damper.

a) Powder coated Aluminum Supply air grilles with volume control damper. Sqm. 05

b) Powder coated Aluminum return air grilles without volume control damper. Sqm. 7.5

14 Supply Air Diffuser

Supplying, installing, testing and balancing of square supply air diffusers, air distribution grid for straightening the air flow through the collar. Powder Coated Aluminum square diffuser with volume control damper. Sqm 4

15 Return Air Diffuser

Supplying, installing, testing and balancing of square supply air diffusers, air distribution grid for straightening the air flow through the collar. Powder Coated Aluminum square diffuser with volume control damper. Sqm 6

16 Electrical Isolator Nos 4

Total of part – II including Taxes

Total (part – I + part –II) Including all taxes

Signature of Contractor with Seal

LIST OF MAKE AND SPECIFICATION:

S.No. Items Acceptable Makes

1. Airhandling units/Fan Section Edgetech/Waves/Ethos/Neutek/

Balanced Air System/Vikram Hitech

2. Ductable Scroll Split units Daikin/Hitachi/Carrier/BlueStar/Voltas

3. Axial flow fan Krugar/Nicotra/Greenheck/Airflow/

Conaire

4. Inline fan Systemair /Greenheck/Ostberg

5. Fresh air blower Krugar/Nicotra/Greenheck

6. VFD for AHUs Danfoss/Honeywell/Johnson

7. Starters/switchgear Siemens/Larsen & Tubro/English

Electric/Havells

8. Control cables Finolex/Havells/Bonton

9. Power cables Havells/KEI/Delton

10. Push button starters Siemens/Control and Switchgear/

Cutler Hammer/Victory Enterprises

11. Auxiliary relays/contractors Siemens/L&T/Cutler Hammer/Jyoti

12. Line type fuse Siemens/English electric/L&T

13. Timer Siemens/L&T/Cutler Hammer/

English electric

14. Cable plugs Hax/Dowells

15. Cable glands Dowells/Electromech

16. Terminal block Elmex

17. Indicating lamps Siemens/L&T/Control and Switch-

18. Selector switches Siemens/L&T/Kaycee

19. Electrical panel Electra Power/Adlec/Cadilec/

Control Wel Switchgears

20. O/L relays with built in SPP L & T/Minilec/Siemens

21. Grilles/Diffuser/VCD/Fire Damper Caryaire/Tristar/Servax/Airflow

/Airmaster/Ravistar/

Balanced Air System

22. G.I. sheets Fiberfill/Sail/Bhushan/National/Jindal

23 G.I. Duct Techno/Zeco/Rolastar

24. Duct and pipe supports Gripples U.K.

25. Pipe

25.1 G.I./M.S. Jindal/Tata/Surya

25.2 Refrigerant (copper) Mandev/Rajco/Maxflow/Shrishyam

25.3 PVC Prakash Surya/Poly Pack/Hindustan

26. Insulation

26.1 Nitrile rubber K-flex/Armacell

26.2 Polyethylene (XLPE) Trocellene/Thermobreak/Thermoflex

27. Duct treatment Paramount

28. Cable tray Neddo/Universal/Mecano/Fedders Lloyd

29. Sequence controller Proton/Siemens/Schneider

30. Copper cabling Havells/ polycab/Finolex

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ANNEXURE - B Section 1 System Design Data

1. General :

The system design, basis of design, estimated requirements and other relevant data are outlined in this section. The detailed specifications and specific requirements are outlined in the subsequent sections.

2. Location :

The proposed building is Heating, Ventilation & Airconditioning work for Rabia Mosque,Jamia Hamdard University,New Delhi

3. Basis of Design :

3.1 Out side conditions Summer : 43.3O

CDB; 24.4O

CWB

Monsoon : 35.6O

CDB; 28.3O

CWB

Winter : 8.9O

CDB; 7.8O

CWB

3.2 Inside conditions : 23.80 C+/-10C (Summer & Monsoon) RH not exceeding 55%

Server Room : 20.00 C+/-10C RH not exceeding 55%

3.3 Light load : 2 wt./sqft.

3.4 Equipment heat load Assembly Hall : 1 kw

3.5 Occupancy : 600 persons

3.6 Fresh air : As per latest ASHRAE Standard 62.1 – 2007

4. Estimated Requirement :

Based on above design data, the estimated requirements are as follows.

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Rabia Mosque

Jamia Hamdard University, New Delhi

AREA NAME 13

Unit

Outside Design Conditions - Summer

DB deg F 110

WB deg F 75

RH % 20

gr/lb 75

Outside Design Conditions - Monsoon

DB deg F 95

WB deg F 83

RH % 60

gr/lb 153

Inside Design Conditions

DB deg F 75

WB deg F 64.4

RH % 55

gr/lb 71.5

Floor Ground Floor

Area considered Sq ft 5545.19

Ht considered Rft 15'

Occupancy nos 606

Fresh air ( @ 10 cfm / person ) cfm 1109

Lights w/sq ft 3

Appliances Kw 5.5

Roof insulated

Ceiling 0

Floor below considered 1

Kitchen Equipment btu

Glass area North Sq ft 321.65

East Sq ft 805.52

South Sq ft 321.65

West Sq ft 201.38

North/east Sq ft 115.43

North/west Sq ft 110.40

South/east Sq ft 115.43

South/west Sq ft 110.40

horizantal Sq ft 0

Wall Area North Sq ft 173.20

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East Sq ft 1208.27

South Sq ft 173.20

West Sq ft 1812.41

North/east Sq ft 28.86

North/west Sq ft 27.60

South/east Sq ft 28.86

South/west Sq ft 27.60

Partition Sq ft 0

0.90

0.88

Summer - TR TR 55.0

Summer - cfm cfm 30595

Monsoon - TR TR 54.6

Monsoon - cfm cfm 27690

Unit Tr selected

Unit cfm as per Tr selected above

Area considered Sq ft 5545

Sq ft / Tr Summer 101

Cfm / Sq ft Summer 6

SQ ft / Tr Monsoon 102

Cfm / Sq ft Monsoon 5

ADP selected summer deg F 56

ADP selected monsoon deg F 56

6 System Design:

6.1 It is proposed to install air cooled ceiling mounted Ductable Scroll Split air conditioning system to air conditioning with R410A refrigerant the above areas. This system is being proposed because it is most efficient, less power consuming air conditioning system. It is highly reliable and maintenance & operation is easiest than any other system of air conditioning. It consume upto 20% less power than any other system of air conditioning.

6.2 It is proposed to install ceiling mounted DX type Ductable Scroll Split units with outdoor units at terrace. 6.3 There shall be 16.5TR-2 nos+11 TR -2 nos Ductable Scroll Split Units as per the requirement of air

conditioning. 6.4 Each outdoor unit shall have at least 1 No. inverter compressor for variable speed.

6.6 Direct fresh air shall be supplied to Units to compensate the fresh air requirement of the production hall.

S-4

6.7 Two stage filtration (Pre-Filter & Micro V Filter) shall be provided to maintain the space dust free.

6.8 Outdoor units shall be installed on terrace near the AHUs and refrigerant circuit along with control

wiring shall be carried out upto each indoor units..

6.10 System shall be complete with electric panel board with cabling and earthing.

7. Items of works to be made available to the contractor:

7.1 3 Ph, 415 +/- 10% Volts, 50 Hz A.C. supply shall be made available for main panel of HVAC. Contractor has to extend the cable and distribute them for number of outdoor units.

7.2 3 Ph, 415 +/- 10% Volts/1 Ph, 220 Volts, 50 Hz A.C. supply up to each indoor units.

7.3 Suitable drain points.

7.4 False ceiling/Boxing work.

8. Drawings:

The drawings forming part of these specifications provide a feasible scheme for locating the equipment. The contractor may re-arrange the equipment for improving the

layout and meeting the site conditions. All such changes shall however be subject to the consultants approval. These tender drawings are not meant to be working drawing which shall be prepared by the contractor as required.

9. Test data :

The plant whole system shall be tested as per specifications given elsewhere and complete test data shall be furnished on prescribed data sheet.

10. Deviation from Specifications :

Deviation from specifications may be accepted, provided such deviations are found necessary and appropriate, in order to conform to the design of established foreign collaborators.

11. Technical Data :

The contractor shall furnish complete “Technical Data” on the equipment offered by him as required under the heading "Technical Data".

12. Performance Guarantee :

12.1 The contractor shall guarantee that the air conditioning system shall maintain the designed inside

temperature within +/-1o

c tolerance and the relative humidity shall not exceed the specified limit.

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12.2 The contractor shall guarantee that the capacity of various components as well as the whole system shall not be less than specified.

12.3 The contractor shall ensure, that the system shall be free of vibrations and disturbing sounds.

13. Technical Data :

The manufacture should organize the factory visit for manufacturing & testing facility before Equipment shipment.

End of Section 1

Section 2 Aircooled Ductable Scroll Split System

1. Scope

1.1 Unit shall be air cooled ductable scroll air conditioner using R410A consisting of indoor and outdoor units, each suitable to cool in summer as per the requirements.

1.2 The refrigerant piping shall be extendable up to 100m with 50m level difference without any

oil traps.

2. Outdoor Unit

2.1 The outdoor unit shall be a factory assembled unit housed in a sturdy weather proof casing constructed form rust-proofed mild steel panels coated with a baked enamel finish.

2.1.1 The outdoor unit shall have multiple scroll compressors and be able to operate even in case of breakdown of one of compressors.

2.1.2 The connectable range of indoor units shall be from 0.6 TR with all outdoor units.

2.1.3 The noise level shall not be more than 62 dB(A)at normal operation measured horizontally 1m

away and 1.5m above ground. 2.1.4 The condenser fins shall be coated with 400 micron film having anti-corrosion and hydrophilic film.

2.1.5 The capacity tables with inverter losses and piping de-ration charts needs to be submitted on

factory letter head.

2.2 The outdoor unit shall be modular in design and shall be allowed for side by side installation.

3. Compressor

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3.1 The compressor shall be of Inverter type capable of modulating capacity by frequency variation / highly efficient hermetic Digital Vapor Injection Scroll capable of capacity modulation by time averaging method & Vapor injection Technology.

4. Heat Exchanger

4.1 The heat exchanger shall be constructed with copper tubes mechanically bonded to aluminum fins to form a cross fin coil. The aluminum fins shall be covered by anti-corrosion resin film. The System must have sub-cooling heat exchanger further to Condenser to increase refrigerating effect in Indoor units.

5. Refrigerant Circuit

5.1 The refrigerant circuit shall include an accumulator, liquid and gas shut off valves and a solenoid valves or pulse width modulation valve.

5.2 All necessary safety devices shall be provided to ensure the safety operation of the system.

6. Safety Devices

6.1 The following safety devices shall be part of the outdoor unit;

High Pressure Switch, Low Pressure Switch, Fan Motor Safety Thermostat, Over Current Relay, Fusible Plugs, Fuses.

7. Oil Recovery System

Unit shall be equipped with an oil recovery system to ensure stable operation with long refrigeration piping lengths.

The system must be provided with oil balancing circuit to avoid poor lubrication.

8. Indoor Unit

This section deals with supply, installation, testing, commissioning of various type of indoor units confirming to general specification and suitable for the duty selected. The type, capacity and size of indoor units shall be as specified in detailed Bill Of Quantities

9. General

Indoor units shall be either ceiling mounted cassette type, or ceiling mounted ductable type or floor standing type or wall mounted type or other as specified in BOQ. Each unit shall have electronic control valve to control refrigerant flow rate respond to load variations of the room.

a) The address of the indoor unit shall be set automatically in case of individual and group control.

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b) In case of centralized control, it shall be set by liquid crystal remote controller . The fan shall be dual suction, aerodynamically designed turbo, multi blade type, statically & dynamically balanced to ensure low noise and vibration free operation of the system. The fan shall be direct driven type, mounted directly on motor shaft having supported from housing. The cooling coil shall be made out of seamless copper tubes and have continuous aluminum fins. The fins shall be spaced by collars forming an integral part. The tubes shall be staggered in the direction of airflow. The tubes shall be hydraulically/ mechanically expanded for minimum thermal contact resistance with fins. Each coils shall be factory tested at 21kg/sqm air pressure under water.

Unit shall have cleanable type filter fixed to an integrally moulded plastic frame. The filter shall be slide away type and neatly inserted.

Each indoor unit shall have computerized PID control for maintaining design room temperature. Each unit shall be provided with microprocessor thermostat for cooling or cooling and heating.

Each unit shall be with wired LCD type remote controller. The remote controller shall memorize the latest malfunction code for easy maintenance. The controller shall have self-diagnostic features for easy and quick maintenance and service. The controller shall be able to change fan speed and angle of swing flap individually as per requirement. The control shall have only basic function such as 3 speed, temperature control and ON/OFF.

10. Ceiling Mounted Ductable Scroll Type Unit

Unit shall be suitable for ceiling mounted type. The unit shall include pre filter, fan section & DX coil section .The housing of unit shall be light weight powder coated galvanized steel. The unit shall have high static fan for Ductable arrangement.

12. Ceiling Suspended Type

Unit shall be suitable for ceiling suspended arrangement below false ceiling. The unit include pre filter, fan section & DX coil section . The housing of unit shall be light weight powder coated galvanized steel.

In addition to above other necessary accessories required along are:

Electrical starter panel – Depending upon the capacity shall be DOL type till 7.5KW & shall be star delta above 7.5KW . The panel should be able to receive 12V signal DC signal from Remote Control (RC) for switching On or switching OFF of fan motor with inter connecting wiring.

Expansion device – Expansion of refrigerant R-410A should be handled by a Electronic Expansion valve OR Thermostatic Expansion Valve depending upon the size and the part load operation of Compressors should be controlled by superheat of Expansion Device at Cooling Coil outlet Upto 10hp EEV, from 8hp to 42hp TXV. The TXV capacity should match with ODU capacity within + 3% variations. This expansion device should be able to communicate the temperature conditions at Cooling Coil Inlet and Outlet to the outdoor and will be installed on the AHU itself for better efficiency. Also this expansion device shall be designed to work with heating as well as cooling cycle depending upon the customer requirement.

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Communication kit – The controller should be able to control the Set Temperature by sensing the air temperature at Return Air path and also should be capable to receive and give signal commands to outdoor unit and indoor unit for increasing or decreasing the capacity output.

Apart from this controller must read the superheat levels at Cooling Coil outlet and must communicate with VRF outdoor. The communication kit should be with power coated box.

Remote control complete – The remote should be corded with wide screen display and able to show the Outdoor Status at any given point of time .Also it shall have different modes like Fan Mode , Heat Mode ,Cooling Mode etc.It should be possible to give address to each AHU with the help of corded remote and finally it should be possible to control it centrally also.

16. Centralized Type Remote (Touch Screen Type) Controller (Option if specified in BOQ)

A multifunctional compact centralized controller shall be provided with the system. The controller must be necessarily a graphic Controller type to act as an advanced airconditioning management system to give complete control of VRV airconditioning Equipment, It should have ease of use for the user and must have a user friendly colored touch screen, icon display and color LCD display.

It shall be able to control up to 64 groups of indoor units with the following functions :-

a) Starting/stopping of Air conditoners as a zone or group or individual unit.

b) Temperature setting for each indoor unit or zone.

c) witching between temperature control modes, switching of fan speed and direction of

airflow, enabling/disabling of individual remote controller operation.

d) Monitoring of operation status such as operation mode & temperature setting of individual

indoor units, maintenance information, trouble shooting information.

e) Display of air conditioner operation history.

f) Daily management automation through yearly schedule function with possibility of various

schedules.

The controller shall have wide screen user friendly color LCD display and can be wired by a non polar 2 wire transmission cable to a distance of 1 km. away from indoor unit.

End of Section 2

Section 3

7 Accessories : All necessary accessories shall be provide for proper operation and shall also include :

JAMIA HAMDARD UNIVERSITY, NEW DELHI

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(i) Vibration isolators . (ii) Double canvas connections at the outlet of each unit. (iii) Nuts, bolts, shims etc. as required for the grouting of the equipment.

(iii) Slide rails for mounting the motor and belt adjustments.

(iv) Nuts, bolts, shims etc. as required for the grouting of the equipment. (v) Slide rails for mounting the motor and belt adjustments.

End of Section 3

Section 4 Controls

1. General :

1.1 The various controls listed below shall be electrically operated and generally comply with the specifications listed below .

1.2 In case of low voltage controls, necessary step down transformers shall be provided with each

control as required.

End of Section 4

Section 5 Control Panel, Motors and Switchgears

1. General

1.1 The motor and switchgears required for various items shall generally be as per specifications given below. All electric motors shall be suitable for 3 phase, 50 Hz, 415 + 10% - 15% Volts A.C. supply.

2. L.T. Electric Panel Boards

2.1 The main L.T. Panel board shall be extendible type on both sides, having in it all switches, starters & accessories and shall be completely factory prewired. It shall be suitable for voltage

systems upto 500 volts, 3 phase, 50 Hz, 4 wire supply capable of functioning satisfactorily in

temperatures of 450C and rupturing capacity not below 31 MVA at 415 Volts.

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2.2 The boards shall be fabricated from 2.0 mm thick, cold rolled M.S. Sheets. The front opening door panels shall be from 2 mm thick, cold rolled M.S. Sheets. Suitable stiffners shall be used in fabricating the housing. All steel members shall first be degreased, then descaled using dilute

sulphuric acid and a suitable phosphating process then the boards shall be given 2 coats of red oxide primer with powder coated finish in siemens grey colour. The switch board shall be dust proof and vermin proof. The panel shall generally conform to IS 8623 (full confirmity not called for). It shall be flush in front and back. The panel shall have front and rear access.

2.3 Cable compartment of adequate size shall be provided in the main distribution board for easy termination of all incoming and outgoing cables entering from bottom or top. Adequate support shall be provided in cable compartment to support cables. All incomimg and outgoing switch terminals shall be brought out to terminal blocks in cable compartments.

2.4 Items such as ammeters, switches etc. shall be located close to the corresponding switchgear and

otherwise all items shall be arranged in a neat symmetrical pattern.

2.5 The doors of the switch compartments and cable access shall be hinged type and that of

busbars shall be fixed type.

2.6 The knobs of the hinged doors shall be provided with a locking arrangement to prevent them from falling down when they are unscrewed for opening the doors.

2.7 All panel doors shall have synthetic rubber gaskets with good ageing, compression and resistance

characteristics.

2.8 All the breakers shall be interlocked with door so that the unit cannot be closed unless the unit

door is closed. The interlock shall also prevent opening the unit door unless the switch/breaker is in OFF position.

2.9 Defeat arrangement shall be provided for deliberate inspection of switch/breaker without having to

switch OFF the unit.

2.10 All the units pertaining to a motor shall be incorporated in one cabin i.e switch, starter, CTS ammeter, current operated MPRD-2 single phasing preventor, indicating lamps etc.

2.11 A danger notice plate of 200 mm x 150 mm of mild steel at least 2 mm thick vitreous enamelled white on both sides and with inscriptions in signal red colour on front side shall be provided on the panel board.

2.12 Every starter/contactor etc. shall be controlled by an isolating device of adequat rating as listed

later.

2.13 A voltmeter and ammeter shall be provided to indicate incoming voltage and alongwith rotary

phase selection switches.

2.14 Ammeters shall be provided for incoming current to all motors of 10 HP (7.5 KW) and higher

ratings.

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2.14.1 Ammeters for all the motors upto 50 HP (37.5 KW) shall be direct reading type.

2.14.2 Ammeters for motors of 50 HP (37.5 KW) and above shall be operated with a selector switch.

2.15 LED type indicating lamps in approved colours shall be provided for the 3 phases and for status of all controlled devices.

2.16 All the switchgear shall be earthed to the earth bus.

2.17 Earth shall be extended for each compartment to the door by means if a flexible, insulated copper

conductor with crimped legs on either side.

2.17.1 Each panel shall be provided with suitable size of earth bus at the rear of the panel and two earth terminals on either side.

2.17.2 Suitable printed PVC ferrules shall be provided for all the conductors for easy identification.

2.18 Etched plastic name plates shall be provided for all the incoming, outgoing switchgears, ammeter, voltmeter etc.

2.19 All the control and auxiliary wiring shall be carried out with PVC insualated copper conductor of proper colour code.

2.20 The power wiring from the circuit/air breakers to the starters shall be carried out using colour coded, PVC insulated copper conductors crimped with lugs.

2.21 The out going wires of starters shall also be pvc insulated colour coded copper conductor crimped with lugs and terminated on a terminal block of proper rating.

Important Note

All Panel fabrication drawings shall be got approved, before the start of the fabrication work.

3. Bus Bars

3.1 The Bus Bar shall be mounted in a separate compartment in the Panel Board.

3.2 The Bus Bars and interconnections shall be of aluminium strips unless otherwise specified.

3.3 The Bus Bar shall have rectangular cross - section of (1) mm2 per Amp. rating for full load current in the 3 phases as well as for neutral and should be extendable, if mounted horizontally.

3.4 The Bus Bars shall be insulated with heat shrink sleeves and colour coated. They should be

supported on supports made of glass fibre reinforced thermosetting compound at regular intervals sufficient to withstand the force of any short circuit.

4. Circuit Breakers

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The panel and the bus bars plus outgoing of all devices shall be protected by different types of circuit breakers as described below and conforming to specification as given later on:

S.No. Type Upto 63 A 80 to 200 A Above 200 to 400 Above 630 A 40 Amp. A

1. Incoming MCB MCCB MCCB MCCB ACB

2. Outgoing MCB MCB MCCB MCCB ACB

4.1 Air Circuit Breaker (ACB)

4.1.1 The air Circuit Breakers shall be Draw out type conforming to I.S: 13947 (Part 2) 1993.

4.1.2 The ACB shall be complete with solid state overload, short circuit and earth fault protection with

adjustable settings.

4.1.3 Each ACB shall have 4 ‘NO’ and 4 ‘NC’ potential free auxillary contacts, in addition to those required

for its internal operating mechanisms. 4.1.4 There shall be suitable indicators for OPEN/CLOSE/SERVICE/TEST and Spring charged positions.

4.1.5 It shall be possible to close the door in Test position.

4.1.6 Castle Key and/or other interlocking devices shall be provided as required.

4.2 Moulded Case Circuit Breakers (MCCB)

4.2.1 The MCCB shall have TP + NL and be suitable for simultaneous manual opening and closing with rotary operating handle.

4.2.2 The ON/OFF/TRIP positions shall be clearly marked and easily visible to an operator and confirm to

latest IS: 13947-1993.

4.2.3 There shall be fixed/adjustable tripping devices with inverse time characterstics for overload and

short circuit protection.

4.2.4 Suitable Interlocking mechanism shall be provided, where required.

4.3 Miniature Circuit Breakers (MCB)

4.3.1 The MCB shall have quick make/break contacts with a heat resistant housing, having high Impact strength and confirm to IS 8828-1996.

4.3.2 The contacts shall be of silver nickel alloy.

4.3.3 The MCB shall permit over load for short duration, as required for Inductive loads and the breaking

capacity shall not be less than 10 KV at 415 Volt A.C.

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4.3.4 It shall be equipped with overload and short circuit protection devices and shall be suitable for DIN mounting.

4.4 Isolator Switches

4.4.1 Isolator switches are to be provided for equipment located outdoors or for those located in separate enclosure, other than those Nos. having the Electric Panel.

4.4.2 The Isolator Switch should be of Rotary Load Break type with a weather proof sheet steel

enclosure. Its rating shall be same as the outgoing device in the Electric Panel.

5. Contactors

All non inductive loads shall be provided with suitable sized magnetic contactors.

5.1 The contactors shall have 3/4 poles plus a minimum 2 ‘NO’ and 2 ‘NC’ contacts. All contacts shall be of solid silver.

5.2 The No volt coil shall generally be suitable for 220 Volts + 10%, - 15% (wide band type) A.C. supply

except when specified or required otherwise.

6. Starters

6.1 The type of starters to be provided for the motors shall be as follows :

6.1.1 Squirrel Cage motors : upto 7.5 HP (5.6 KW) Direct on Line Type

6.1.2 Squirrel Cage motors : Above 7.5 HP (5.6 KW) Automatic Star Delta Type

6.1.3 Compressor motor : Above 300 HP (225 KW) Automatic Auto Transformers

(where specified)

6.1.4 All starters shall have auxiliary contacts for interlocking different machines, connecting indicating lights, controls, alarms, etc.

6.1.5 All starters shall be provided with separate single phasing preventors.

6.2 Direct On-Line Starters

6.2.1 These starters shall have heavy duty air break contactors of suitable rating.

6.2.2 These starters shall be complete with adjustable overload relays on all three phases, single phase

preventing device and under voltage release. The starters should be “hand reset” type.

6.2.3 The “No Volt Coil “ of these starters shall be 220 Volts + 10% - 15% (wide band type) whenever any

controls on safety devices are connected in the starters circuits, otherwise standard 415 volts

coils may be used. There shall be ON-OFF push button for each starter unless remote operation of the starter is required.

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6.3 Automatic Star Delta Starters

6.3.1 These starters shall have heavy duty air break contactors of suitable ratings along with an adjustable timer to automatically switch the motor connections from star to delta connections.

6.3.2 Each starter shall be complete with adjustable overload relays on all three phases and under

voltage release. The starters should be “hand reset” type.

6.3.3 The “No Volt Coil” shall be of 220 Volts + 10% - 15% (wide band type) rating wherever any controls

of safety device are connected in the starter circuit, otherwise standing 415 volts coils may be used. There shall be ON-OFF push button for each starter unless remote operation of the starter is required.

6.4 Automatic Auto -Transformer Starter

6.4.1 These starters will be oil immersed, each one fixed on a separate panel.

6.4.2 Necessary devices shall be provided for the automatic tap setting of the starter.

6.4.3 The starter should have “No Volt Coil” wide band type circuit of 220 volts to be connected to

control circuits.

6.5 The Motor starter shall be in accordance with IS 1882. The starter shall be totally enclosed metal clad, dust and vermin proof construction. The starter shall be of continuos rating.

6.6 Contactors shall have the number of poles as required for appropriate duty. The making capacity of the starters shall be as per AC 23 of ISS.

7. Panel Accessories 7.1 All Voltmeters and Ammeters as specified shall be square of 96 mm x 96 mm, flush mounting type.

7.2 The Indicating Lamps shall be of LED type with Low Watt Power. The Lamps shall have translucent

covers of following colours.

7.2.1 Red/Yellow/Blue for phase light. 7.2.2 Green/Amber for ON/OFF indication. 7.2.3 Concealed door lock.

8. Subsidiary Panels (With Single Switch) 8.1 Subsidiary panels shall be provided for equipment located away from the plant room, such as air

handling units, blower etc.

8.2 The construction of these panel should be similar to the main panel and shall have all related

accessories, except when specified. 8.3 The sub panel shall be wall hung type and as compact as possible.

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8.4 Panel fabrication drawings shall be got approved before fabrication.

9. Squirrel Cage Motors

9.1 The squirrel cage motors shall be either screen protected or totally enclosed fan cooled, depending on the application and as stated in “schedule of equipment”. All motors shall conform to IS 325/1978, IS : 1231 for foot mounted motors and IS:2223 for flange mounted motors.

9.2 The stator windings shall be with class ‘B’ insulation.

9.3 Motors shall be provided with ball/ roller bearings. Bearings shall have ample capacity to deal with

any axial thrust. Suitable grease nipple shall be provided for regreasing the bearings.

9.4 Motors shall be provided with a cable box for terminating the PVC insulated, PVC sheathed

armoured aluminium cables.

10. Installation of Motor

10.1 Installation of the motor shall be in accordance with IS-900.

10.2 The motor along with its driven machine or equipment shall be provided with vibration isolation

arrangement motors shall generally be provided with slide rails fixed to the base units nuts and bolts to facilitate belt installation and subsequent belt tension.

10.3 Motors shall be wired as per the detailed specifications and drawings all the motor frame shall be earthed with 2 Nos. of earthing conductors.

10.4 Motors shall be tested at works in accordance with the relevant Indian standard specifications and test certificates shall be furnished in triplicate.

Note : Rubber mats of 1100 volts capacity shall be laid in front of panel as per site requirement and no extra shall be paid.

11. Painting

All sheet steel work shall undergo a multi tank process of degreasing, pickling in acid, cold rinsing, phosphating, passivating and then sprayed with a high corrosion resistant primer. The primer shall be baked in oven. The finishing treatment shall be by application of powder coated paint of approved shade and stoved.

End of Section 5

Section 6 Duct Work and Outlets

1. General :

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1.1 The work under this part shall consist of furnishing labour materials, equipment and appliances as specified necessary and required to install all sheet metal and other allied work to make the air conditioning supply, ventilating, and exhaust system ready for operation as per drawings.

1.2 Except as otherwise specified all duct work and related items shall be in accordance with these specifications.

1.3 Duct work shall mean all ducts, casings, dampers, access doors, joints, stiffners and hangers.

2. Duct Materials :

2.1 The ducts shall be fabricated from galvanized steel sheets class VIII conforming to ISS:277- 1962 (revised) or Aluminium sheets conforming to ISS:737-1955 (wherever Aluminium ducts are specified).

2.2 All duct work, sheet metal thickness and fabrication unless otherwise directed, shall strictly meet requirements, as described in IS:655-1963 with amendment-I (1971edition)

The thickness of the sheet shall be as follows :-

Sheet thickness Type of Bracing if any Joint Join Size of Duct G.I. Aluminium

2.2.1 Upto 750mm 0.63 mm 0.80 mm G.I. Flange --

2.2.2 751 mm to 1000 mm 0.80 mm 1.00 mm 25x25x3 mm 25x25x3 mm

angle iron frame angle iron with 8 mm dia frame at the nuts & bolts rate of 1mt.

2.2.3 1001 mm to 0.80 mm 1.00 mm 40x40x5 mm 40x40x3 mm

1500 mm angle iron frame angle iron with 8 mm dia frame at the nuts & bolts rate of 1 mt.

2.2.4 1501 mm to1.00 mm 1.50 mm 50x50x5 mm 40x40x3 mm 2250 mm at angle iron at the rate of with 10 mm 1.2 mt. to be dia nuts & crossed braced bolts @ 125mm at125mmdiagonally center

2.2.5 2251 mm

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and Above 1.25 mm 1.80 mm 50x50x6 mm at 40x40x3 mm angle iron the at the rate of

rate of frame 1.2 mt.to be

with 1.6 crossed braced 10 mm nuts & diagonally

bolts at 125 mm centre.

2.3 The gauges, joints and bracings for sheet metal duct work shall further conform with the provisions as shown on the drawings.

2.4 Ducts larger than 450 mm shall be cross broken, duct sections upto 1200 mm length may be used with bracing angles omitted.

2.5 Changes in section of duct work shall be affected by tapering the ducts with as long a taper as

possible. All branches shall be taken off at not more than 45 Deg. Angle from the axis of the main duct unless otherwise approved by the engineer-in-charge.

2.6 All ducts shall be supported from the ceiling/slab by means of M.S. Rods of 9 mm (3/8") Dia with

M.S. Angle at the bottom. The rods shall be anchored to R.C. Slab using metallic expansion fasteners.

3. Installations :

3.1 During the construction, the contractor shall temporarily close duct openings with sheet metal covers to prevent debris entering ducts and to maintain opening straight and square, as per direction of Engineer-In-Charge.

3.2 Great care should be taken ensure that the duct work does not extend outside and beyond height

limits as noted on the drawings.

3.3 All duct work shall be of high quality approved galvanized sheet steel guaranteed not to crack or

peel on bending or fabrication of ducts. All joints shall be tight and shall be made in the direction of air flow.

The ducts shall be reinforced where necessary, and must be secured in place so as to avoid vibration of the duct on its support.

3.4 All air turns of 45 degrees or more shall include curved metal blades or vanes arranged so as to

permit the air to make the abrupt turns without an appreciable turbulence. Turning vanes shall be securely fastened to prevent noise or vibration.

3.5 The duct work shall be varied in shape and position to fit actual conditions at building site all

changes shall be subject to the approval of the Engineer-In-Charge. The contractor shall verify all measurements at site and shall notify the engineer-in-charge of any difficulty in carrying out his work before fabrication.

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3.6 Sponge rubber or approved equal gaskets shall be installed between duct flanges as well as between

all connections of sheet metal ducts to walls, floor columns, heater casings and filter casings. Sheet metals connections shall be made to walls and floors by means of wooden member anchored to the building structure with anchor bolts and with the sheet screwed to them.

3.7 Flanges bracings and supports are to be black, mild steel and are to be given two coat primer of red oxide and then painted with Aluminium colour paint on all surfaces before erection. Accessories such as damper blades and access panels are to be of materials of appropriate thickness and the finish similar to the adjacent ducting, as specified.

3.8 Joints, seams, sleeves, splitters, branches, takeoffs and supports are to be as per duct details as

specified, or as decided by Engineer-In-Charge.

3.9 Joints requiring bolting or rivetting may be fixed by Hexagon nuts and bolts, stove bolts or buck

bolts, rivets or closed centre top rivets or spot welding. Self tapping screws must not be used. All jointing material must have a finish such as cadmium plating or Galvanized as appropriate.

3.10 Flexible joints are to be fitted to the suction and delivery of all fans. The material is to be normally

double heavy canvass or as directed by Engineer-In-Charge. On all circular spigots the flexible materials are to be screwed or clip band with adjustable screws or toggle fitting. For rectangular ducts the material is to be flanged and bolted with a backing flat or bolted to mating flange with backing flat.

3.11 The flexible joints are to be not less than 75 mm and not more than 250 mm between faces.

3.12 The duct work should be carried out in a manner and at such time as not to hinder or delay the

work of the other agencies especially the boxing or false ceiling contractors.

4. Dampers :

4.1 At the junction of each branch duct with main duct and split of main duct, volume dampers must be provided. Dampers shall be two gauges heavier than the gauge of the large duct and shall be rigid in construction.

4.2 The volume dampers shall be of an approved type, lever operated and complete with locking

devices which will permit the dampers to be adjusted and locked in any positions.

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

1.25 mm (18) gauge, reinforced with 25 mm angles 3 mm thick along any unsupported side longer than 250 mm. Angles shall not interfere with the operation of dampers, nor cause any turbulence.

4.4 Automatic and manual volume opposed blade dampers shall be complete with frames and bronze

bearings as per drawings. Dampers and frames shall be constructed of 1.6 mm steel sheets and blades shall not be over 225 mm wide. The dampers for fresh air inlet shall additionally be provided with fly mesh screen, on the outside, of 0.8 mm thickness with fine mesh.

4.5 Wherever required for system balancing, a volume balancing opposed blade damper with quadrant and thumb screw lock shall be provided.

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4.6 After completion of the duct work, dampers are to be adjusted and set to deliver air flow as specified on the drawings.

4.7 Automatic fire dampers shall be provided wherever shown on the drawings. The damper shall be

multiblade curtain type. The blades should out of the air stream in open position and shall be constructed with minimum 1.8 mm thick aluminium sheets. The frame shall be of 1.6 mm thickness. Other materials shall include return spring, locking device, solenoid aculator, etc.

The fire dampers shall be capable of operating automatically on receiving signal from a fire alarm panel.

5. Access panel :

5.1 A hinged and gasketed access panel measuring at least 450 mm x 450 mm shall be provided on

duct work before each reheat coil and at ach control device that may be located inside the duct work.

6. Miscellaneous :

6.1 All duct work joints are to be true right angle and with all sharp edges removed. 6.2 Sponge rubber gaskets also to be provided behind the flange of all grilles.

6.3 Each shute from the duct, leading to a grille, shall be provided with an air deflector to divert the air

into the grille through the shoot.

6.4 Diverting vanes must be provided at the bends exceeding 600 mm and at branches connected into

the main duct without a neck.

6.5 Proper hangers and supports should be provided to hold the duct rigidly, to keep them straight and

to avoid vibrations. Additional supports are to be provided where required for rigidity or as directed by Engineer-In-Charge.

6.6 The ducts should be routed directly with a minimum of directional change.

6.7 The duct work shall be provided with additional supports/hangers, wherever required or as

directed by the Engineer-In-Charge, at no extra cost. 6.8 All angle iron flanges to be welded electrically and holes to be drilled. 6.9 All the angle iron flanges to be connected to the GSS ducts by rivets at 100 mm centres.

6.10 All the flanged joints, to have a sponge rubber packing stuck to the flanges with suitable adhesive. 6.11 The G.S.S. Ducts should be lapped 6 mm across the flanges. 6.12 The ducts should be supported by approved type supports at a distance not exceeding 2.4 metres.

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7. Standard Grilles :

7.1 The supply and return air grilles shall be fabricated from extruded Aluminium sections. The supply air grilles shall have single/double louvers. The front horizontal louvers shall be of extruded section, fixed/adjustable type. The rear vertical louvers where required shall of Aluminium extruded sections and adjustable type. The return air grille shall have single horizontal extruded section fixed louvers. The grilles may or may not be with an outer frame.

7.2 The damper blades shall also be of extruded Aluminium sections. The grill flange shall be fabricated

out of Aluminium extruded section. Grilles longer than 450 mm shall have intermediate supports for the horizontal louvers.

8. Diffusers/Slot Diffusers :

8.1 The ceiling type square diffusers shall be of Aluminium extruded sections with flush or step down face, as specified with fixed pattern and neck.

8.2 All supply diffusers shall be provided with extruded Aluminium dampers, with arrangement for

adjustment from the bottom. 8.3 The slot diffusers shall of Aluminium extruded sections with diffusion plate and sliding damper.

9. Linear Diffusers/Grilles :

9.1 The linear diffusers/grilles shall be fabricated from Aluminium extruded sections.

9.2 The diffusion blades shall be extruded, flush mounted type with single or double direction air flow.

9.3 The frame shall be of Aluminium extruded section and shall hold the louvers tightly in fixed

position. 9.4 The dampers as described under grilles shall be provided wherever specified.

10. Fire & Smoke Dampers

10.1 All supply and return air ducts at AHU room crossing and at all floor crossing shall be provided with motor operated fire & smoke damper of at least 90 minutes rating as per UL 555/1995 tested by CBRI.

These shall be of multi leaf type and provided with spring return electrical actuator having its own thermal trip for ambient air temperature outside the duct and air temperature inside the duct.

10.2 Fire dampers shall be multi leaf type. The blades & outer frame shall be made of 16 gauge

galvanized steel sheet. Fire damper assembly shall be factory fitted in a sleeve made of 18 gauge galvanized steel sheet of minimum 400 mm long. The blades shall be pivoted on both sides using chrome plated spindles in self lubricated bronze bushes.

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Metallic compression seal shall be provided on both ends to prevent smoke leakage. Stop seals shall be provided on Top & bottom. Dual side linkage shall be provided for better structural stability. The construction of the fire damper shall allow maximum free area to reduce pressure drop & noise in the air passage.

10.3 For wall mounted fire dampers retaining angles shall be supplied & installed by HVAC contractor as per established installation procedure. Whereas the fire damper is also to be used for smoke management (smoke & fire damper) the same shall be as per UL 555S-Class II.

10.4 Every motorised fire damper/smoke & fire damper shall be tested for in the factory and will be

certified by the manufacturer in form of the test certificate.

10.5 Fire damper shall also be supplied with spring locked fusible link rated for 72O C (UL stamped) to close fire damper in event of rise in duct temperature.

10.6 For fire dampers/smoke fire dampers of size higher than one approved by certifying agency the

damper shall be supplied in multiple units of size not exceeding the tested damper by CBRI. All the multiple units shall be housed in a common factory sleeve.

10.7 Actuators

The actuator used shall be maintenance free direct coupled spring return suitable to work on 24 V electric supply. The torque rating of the actuator shall exceed at least by 15% over torque required to open/close the damper. The selection of actuator size shall be the responsibility of the manufacture of the fire damper. Spring return time shall be 20 seconds or less at ambient temperature other features of the damper actuator shall be as under.

a) It have tamper proof housing with IP-54 protection rating.

b) Shall have mechanical integrity of at least one hour at 900O C.

c) Shall have minimum 60000 safe position at rated torque. It shall be capable to withstand

temperature of 75O C for 24 Hrs. d) Shall have electronic over load or digital sensing circuit to prevent damage to actuator. e) Should be capable of changing direction of rotation by changing mounting orientation.

f) Shall have manual over ride facility.

10.2 Control Panel

The control panel shall be supplied by damper manufacturer fitted on damper compatible with damper actuators. The control panel shall have at least following features.

i. Power on indicating lamps with 230 V/24 V transformer. ii. Damper close & open indication. iii. Reset push button.

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iv. Push button for manual running of actuator for periodic inspection. v. Auxiliary contacts 24 V & 230 V. vi. Contact points to receive single from smoke defector/fire alarm panel.

The control panel shall receive 230 V A/C supply & interconnecting wiring between control panel & actuator shall be done using fireproof cables.

Access door will be provided in the duct before each fire damper.

11. Painting :

11.1 All grilles, and diffusers shall be powder coated, before installation, in approved colour.

11.2 All ducts immediately behind the grilles/diffusers etc. are to be given two coats of black paint in matt finish.

12. Testing :

12.1 After completion, all duct system shall be tested for air leakage.

12.2 The entire air distribution system shall be balanced to supply the air quantity as required in various

areas and the final tabulation of airquantity through each outlet shall be submitted to the engineer-in-charge for approval.

End of Section 6

Section 7 Pipe Work

1. General :

All piping work shall conform to quality standards and shall be carried out as per specifications and details given hereunder :-

2. Piping :

2.1 Drain Piping :

2.1.1 The drain piping shall be PVC .

2.1.2 The fittings shall be of `R’ brand of equal forged with screwed connections.

2.1.3 Pipe crosses shall be provided at bends, to permit easy cleaning of drain line. 2.1.4 The drain line shall be provided upto the nearest drain trap and pitched towards the trap.

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2.1.5 Drain lines shall be provided at all the lowest points in the system, as well as at equipment, where leakage of water is likely to occur, or to remove condensate and water from pump glands.

2.1.6 The drain pipe shall be insulated as per specification in section ‘Insulation’.

2.2 Copper Piping :

2.2.1 Seamless soft copper tubing, type L shall be used to make connections to equipment, wherever required or specified.

2.2.2 The Flare nuts shall be of brass and the tees, elbows, reducers etc. shall all be of copper.

2.3 Refrigerant Piping :

All refrigerant piping for the air conditioning system shall be constructed from soft seamless upto 19.1mm and hard drawn copper refrigerant pipes for above 19.1mm with copper fittings and silver-soldered joints. The refrigerant piping arrangements shall be in accordance with good practice and ASTM B88 type - I and within the air conditioning industry, and are to include charging connections, suction line insulation and all other items normally forming part of proper refrigerant circuits.

All joints in copper piping shall be sweat joints using low temperature brazing and or silver solder. Before jointing any copper pipe or fittings, its interiors shall be thoroughly cleaned by passing a clean cloth via wire or cable through its entire length. The piping shall be continuously kept clean of dirt etc. while constructing the joints. Subsequently, it shall be thoroughly blown out using nitrogen. After the refrigerant piping installation has been completed, the refrigerant piping system shall be pressure tested using nitrogen at pressure of 5Kg per sq.cm for both high and low side. Pressure shall be maintained in the system for 24 hours. The system shall then be evacuated to minimum vacuum if 700mm hg and held for 24 hours.

The air-conditioning system supplier shall be design sizes and erect proper interconnections of the complete refrigerant circuit.

The thickness of copper piping shall not be less than mentioned below:

Pipe Size in mm( OD) Wall Thickness in mm

a) 54.1 1.5

b) 41.3 1.3

b) 34.9 1.3

c) 28.6 1.2

d) 25.4 1.2

e) 22.2 1.0

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f) 19.1 1.0

g) 15.9 1.0

h) 12.7 0.8

i) 9.5 0.8

j) 6.4 0.8

The suction line pipe size and the liquid line pipe size shall be selected according to the manufacturers specified outside diameter. All refrigerant pipes shall be properly supported and anchored to the building structure using steel hangers, anchors, brackets and supports which shall be fixed to the building structure by means of inserts or expansion shields of adequate size and number to support the load imposed thereon.

The insulation of pipe shall be carried out on specification in section ‘Insulation’.

End of Section 7

Section 8 Insulation

1. General :

The Insulation of copper refrigerant and drain piping, ducting, etc., shall be carried out as per specifications given below :

2. Materials :

The materials to be used for insulation shall be as follows, unless some other material is specifically mentioned elsewhere.

2.1 Insulation Material for Piping System and Ducts :

The insulation for copper refrigerant, drain piping, etc. shall be carried out from closed cell, chemically linked cross linked polyethlene (XLPE) insulation.

Thermal conductivity of the material shall not exceed 0.035w/mk at an average temperature of 40 0C. the density of material shall be 33+/-3 kg/m3 or 0.033 GM/CC, the material shall be rated as class – I, as per BS 476 Part 7. The rating as per DIN 4102 shall be BI, the smoke density of material as per AS 1503.3. The water vapour permeability . As per DIN 52615 and shall not exceed 0.15 ng/MSec.Pa. The material shall have a fire approval from CBRI/FIRE ADVISOR (Govt. of India) / Chief Fire Officer.

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2.2 Application :

2.2.1 The duct/pipe surfaces will be thoroughly cleaned prior to applying the insulation. To avoid application of adhesive in the field the insulation shall be provided with self adhesive. Otherwise the adhesive of suitable grade shall be uniformly applied on the duct/pipe surface and the insulation and cured, before sticking to the duct. The insulation can be wrapped around the duct as one piece where size does not permit. The same be cut to exact width/height of duct on each of the faces.

2.2.2 The duct/pipe insulation joints will be overlapped with a self adhesive tape of the same material.

The tape shall be minimum 2.5mm thick and 50mm wide.

2.2.3 A self adhesive strip of same material of suitable thickness (Height), to cover the complete height of

the flange will be provided around the flanges and the flange joint neatly covered with insulation. So as to reduce heat loss through flanges in addition to covering the flange connection/joint.

2.2.4 For pipe insulation the material should be cut using a die/template to be provided by the

manufacturer to ensure proper 450 angle is cut the and the joining/overlapping of the insulation does not cause any bulging or stretching.

2.2.5 The airconditioning duct shall be insulation with above specified insulation with following thickness.

In Office area - 6 mm

In Production area - 13 mm

2.3 Duct Acoustic Insulation

The material for duct accoustic treatment shall be carried out from nitrile rubber open cell material. The material should be fibre free, density shall be within 140-180 kg/m3. The material

should be have thermal conductivity not exceeding 0.047w/M.K. at 200C and it should with stand

maximum surface temperature of + 85 0C and minimum surface temperature of -20 0C .

The material should confirm to class – I rating for surface spread of flame in accordance to BS 476 part 7 UL 94, (HBF, HF-1 & HF-2) in accordance to UL 94, 1996. Insulation should pass air Erosion resistance test in accordance to ASTM standard C 1071 – 05 (section 12.7).

2..4 Application

2.4.1 Ducts so identified and marked on drawings and include in BOQ shall be provided with accoustic lining of thermal insulation material .

2.4.2 The inside surface for the duct shall be covered with adhesive recommend by manufacturer. Cut

foamed sheets into required sizes, apply adhesive on the foam and stick it to duct surface.

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End of Section 8

Section 9 Electric Wiring

1. General :

The electric wiring of motors for compressors, pumps, air handling units etc. As well as controls, heaters etc. and earthing of all equipment shall be carried out as per specifications given hereunder.

2. Wiring for Motors, Heaters etc :

2.1 The wiring for above equipment shall be carried out in conduits or using PVC armoured cables.

2.2 The PVC armoured power cable for use on 415 volts system shall be 3 or 3.5 core with aluminium conductors and be of 1100 volts grade, as per IS 1554 part I-1964. The cross section of the cable shall be to suit the load or rating of the equipment. The cable shall be aluminium conductor PVC insulated single wire/strip armoured with overall PVC sheathing.

2.2.1 The cables shall be laid as per IS-1255/1967, Indian Standard Code of Practice.

2.2.2 The cables shall be laid, as per drawings or along a short and convenient route between switch

board and the equipment, either in trenches, on wall or on hangers, supported from the slab. Cable routing shall be checked on the site to avoid interference with structure, equipment etc. Where more than one cables are running close to each other, proper spacing should be provided between them.

2.2.3 The radius of bends of the cable should not be less than 12 times the radius of cable to prevent undue stress and damage at the bends, the cables should be supported with wooden cleats fixed on M.S. Supports, when running in trenches, wall or ceilingsuspended hangers. When laid under ground the cables should be covered with fine soft earth and protected with

cement concrete covering. Suitable G.I. Pipe shall be used wherever the cable comes out of the connected surface and clamped properly.

2.2.4 Wooden bushes shall be provided at the ends of pipes through which cables are taken in walls and floors.

2.2.4 All cables shall be terminated using suitable size cable glands and packing.

2.3 The wiring in conduits shall be 1100 volts grade.

2.3.1 The conduits used shall be of high quality, all joints shall be made with sockets. The bends and elbows shall have inspection covers fixed with grease free screws.The joints shall be water tight.

Approved metal saddles shall be used to secure the exposed conduits at a space of 1 meter or less. The connection of the conduit to switches etc., shall be secured by a check nut and ebonite bushes provided at the ends of conduits.

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2.3.2 Flush inspection covers shall be provided in case of concealed, recessed conduits. The staples for the conduits shall not be spaced more than 0.60 meters apart. Before filling up the chase with concrete the conduits should be given a coat of rust proof paint.

2.3.3 The wires shall be drawn only after all the conduits have been properly fixed in position.

3. Control Wiring :

3.1 Control cables shall be 650 volts grade as per IS 1554 made from copper conductor of 1.5/2.5 sq. mm PVC insulated single multi core unarmoured with an overall PVC sheathing.

3.2 The cables and conduits wiring shall be carried out as per details given under 2.2 and 2.3 above.

4. Earthing :

4.1 All equipment connected with electric supply shall also be provided with double earthing continuity conductors. The size of copper earthing conductors shall be :-

___________________________________________________________ Size of phase wire sq.mm size of copper conductor

Aluminium tape/wire (swg) ___________________________________________________________

300 25 mm x 6 mm (strip) 185 20 mm x 3 mm (strip) 150 20 mm x 3 mm (strip) 120 12 mm x 3 mm (strip)

95 4 Swg 70 4 Swg 50 6 Swg 35 8 Sw 25-6 8 Swg

4 10 Swg

Note :- GSS earthing conductors of equivalent size may be used in lieu of copper earth mentioned above.

5. Miscellaneous :

5.1 The final connections to the equipment shall be through flexible connections in case of conduit wiring and also where the equipment is likely to be moved back and forth, such as on slide rails.

5.2 An isolator switch shall be provided at any motor which is separated from the main switch panel by

a wall or partition or other barrier or is more than 15 metres away from the main panel.

5.3 Two separate and distinct earthing conduits shall be connected from the equipment upto the main

switch board panel.

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5.4 The branch lines from the main panel to each equipment shall be separated and should not criss cross other lines.

5.5 The entire installation shall be tested as per electricity rules and I.S.S 732-1973 with amendments

1,2 & 3 prior to the commissioning of the plant and a suitable test report furnished by a competent and authorised person. The test report will be obtain by contractor himself at his own expenses.

5.6 All exposed switch board panels, conduits, hangers etc. shall be given 2 coats of suitable paint of

approved colour, when all work has been completed.

End of Section 9

Section 10 Tests at Site/Works

1. General :

The contractor must perform all inspection and tests of the system as a whole and of components individually as required, under the supervision of the Architect/ Consultants, in accordance with the provisions of the applicable ASHRAE standards or approved equal and furnish necessary test certificates from manufacturers at the time of delivery of requirement at side.

2. Compressors/Condensers/Indoor Units/Joints etc.

2.1 Pressure test for various components and assembled equipments at 1.5 times design pressure or double the operating pressure whichever is higher.

2.2 Leak test after assemblies at design pressure.

2.3 Static and dynamic balancing on electronic precision machine for rotating parts, links, impellor/crank shaft assemblies etc.

2.4 Testing of oil passages in compressor at 1.5 times discharge pressure. 2.5 For outdoor units electronic leak, air running test, leak test with dry nitrogen.

3. Airhandling Units/Fan Coil Units

3.1 Blowers

3.1.1 Dynamic/static balancing of impeller.

3.1.2 Performance test as per applicable codes.

3.2 Coils

3.2.1 Pneumatic test.

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3.3 Filters

3.3.1 Test of filter elements as per B.S. 2831 B.S. 1701 as applicable. This is to as certain filtration efficiency by weight at inlet and outlet.

3.4 Manufacturer’s test certificates also to be produced for the assembled F.C.U. Final dimensional check will be done. Inspection will be done during assembly of components for quality of workmanship, painting etc.

3.5 Piping

Materials check for specifications and size.

3.6 Valves

Nitrogen test certificates.

3.7 Motors

Manufacturer’s test certificate as per motor data sheet.

3.8 Instruments and Controls

Visual examination.

4. For Associates Works at Site :

4.1 All electrical items will be subjected to inspection at any stage during manufacturing activity. Routine electrical test as per relevant codes. Inspection of manufacturer’s test certificates.

4.2 Inspection of raw materials to be used for fabrication and assembly and inspection of

manufacturer’s certificates.

4.3 Inspection of welding including welders qualification as desired by inspection engineers. Inspection

of fabricated items. 4.4 Pressure testing of pipe fittings used for the refrigerant.

4.5 Pressure testing, leak testing of complete piping network for refrigerant. 4.6 Vacummizing and gas/oil charging for refrigeration system.

4.7 Checking of electrical circuits (power & controls) and checking functioning of controls of

refrigerant systems and other circuits of air conditioning plant. 4.8 Checking of calibration of controls and instrumentation

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4.9 Checking of assemblies for electrical control panel, instruments panels, local panels (dimensional and functional) annunciator panels etc.

4.10 Inspection of complete electrical installation at site.

4.11 Performance testing of complete A.C. Plant as per specifications.

5. The above inspection procedure is given for general guidance and information of vendors and inspection of purchaser/consultant is strictly not limited to these and inspection engineer of purchaser/consultant will have full right to have detailed inspection at any stage right from

placement of order to completion of project as desired by inspection engineer, co-ordination of inspection agency of purchaser/ consultant with his factory/ subvendor’s factory/erection site will be the sole responsibility of successful vendor after placement of order for complete air conditioning plant covered under these technical specifications.

6. Piping System :

6.1 In general pressure tests shall be applied to piping only once after the connection of equipment and appliances. In no case shall piping, equipment or appliances be subjected to pressure exceeding their test ratings.

6.2 Tests shall be completed and approved before any circuit is commissioned .

6.3 A