Specifications - AC System

Technical Specifications, AC System

TECHNICAL SPECIFICATIONSCLAUSE BY CLAUSE COMPLIANCE

ItemNo.

Item Description / Specification(Mandatory requirements)

Complied If not complied, Detail of Deviation Proposed and

Justification

1. Scope of work

a. Scope shall cover design, manufacture, assembly & testing at manufacturer’s works, delivery at site, installation, testing & commissioning into service, carrying out all acceptance tests, for VRV/VRF Air-Conditioning and Ventilation System.

Yes/No

b. The Scope of Work and Technical Specifications shall constitute Bill of Quantities (BOQ) and Tender Drawings enclosed herewith.

Yes/No

c. The Scope of Work shall include supply, installation, testing and commissioning of following major items:1. 3 nos. VRV/VRF type AC Outdoor Units of minimum capacity 270,000 BTU/hr, 235,000 BTU/hr and 152,000 BTU/hr using refrigerant R410A or 134a,2. Ceiling suspended and Ceiling cassette type indoor units of various capacities as indicated in the drawings and in the BOQ,3. Refrigerant piping including thermal insulation, trunking, supports and required accessories,4. Power and Control panels, 5. Power and Control cabling including terminations,6. Condensate piping system including thermal insulation,7. Centralized system controller, both Hardware and Software including cabling and connection,8. Any other works for completion and satisfactory operation of the installed system including minor civil works.

Yes/No

d. The tender drawings shall be as listed below:1. AC/Par/2010/01 AC VRF/VRV System Schematic Diagram2. AC/Par/2010/02 A & B Air Conditioning System Layout Plan – Ground Floor3. AC/Par/2010/03 A & B Air Conditioning System Layout Plan – First Floor4. AC/Par/2010/04 Trunking Works – Typical Details and Electric Single Line Diagram

Yes/No

e. The approximate area to be air conditioned shall be:1. Ground floor 403 sq. m and 167 sq. m2. First floor 342 sq. m and 42 sq. mShall consider all the areas indicated in the drawings for air conditioning.

Yes/No

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ItemNo.



Justification

f. Shall install outdoor condensing units on the first floor terrace, and on ground floor court yard as indicated in the drawings.

Yes/No

g. Shall consider following internal heating loads in AC load capacity calculations:1. Lighting load: 20 W per sq. m2. Equipment load: 80 W per sq. m3. Human Loading: Approx. 56 persons in ground floor,

35 persons in first floor.

Yes/No

h. Shall achieve following indoor conditions by the installed system:1. Temperature: 24 ˚C ± 2˚C2. Relative Humidity: 55% ±5%

Yes/No

i. Shall consider following outdoor conditions in system design and AC load calculations and selecting equipment:

Annual Average Dry Bulb Temperature: 31CAnnual Average Wet Bulb Temperature: 27CMaximum Dry Bulb Temperature: 33CMaximum Relative Humidity: 90%, non-condensing

Yes/No

j. Shall have the minimum acceptable unit capacities : Unit # 1 - 270,000 BTU/hr, Unit # 2 - 235,000 BTU/hr and

Unit # 3 – 152,000 BTU/hr .

Yes/No

k. Shall provide with the technical bid, the heat load calculations justifying selected models and equipment, Indoor and Outdoor Unit capacities.

Yes/No

l. Shall provide manufacturers technical literature and data sheets (original prints and not photo copies) for verifying selected models of equipment.

Yes/No

j. Shall design for operating with an electrical supply with following parameters:1. Nominal System Voltage 400V, ac ± 5%.2. Frequency 50 Hz3. Fault Level 25kA

Yes/No

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ItemNo.



Justification

2. General Requirements and Guidelines

a. Equipment and material proposed for complete system shall comply with this specification and shall be conforming to the requirement of the latest editions of applicable JIS / ARI / BS Standards.

Yes/No

b. Equipment and material proposed for complete system shall be new, free from defects and compatible for correct and efficient performance of the system for providing indoor conditions specified.

Yes/No

c. Power and control cables, connectors and accessories as specified for complete installation shall be supplied and installed.

Yes/No

d. Any component or accessory required for complete and successful operation of the system, either specified in detail or not, shall be supplied and installed, as necessary.

Yes/No

e. In case of a conflict in specifications, shall bring the same to the attention of the Engineer and obtain clarification in writing, as applicable.

Yes/No

f. Shall develop Shop Drawings for the complete system indicating the specific design and installation details of the complete system and shall obtain approval from the Engineer before commencing installation.

Yes/No

g. Shall provide detailed equipment layout, operator console layout, etc., in various offices and in the Air Conditioning Control Room.

Yes/No

h. Shall be the exclusive / authorized agent for the equipment offered and may be responsible for after sales / service support.

Yes/No

i. Shall investigate the field conditions and shall propose the most suitable equipment, material and / or items for the proposed system.

Yes/No

j. Shall provide surge protection at each of the power supply points to protect equipment by high voltage surges, from lightning or otherwise

Yes/No

k. Shall closely co-ordinate with the Engineer for correct fixing of panels, indoor and outdoor units, trunking, piping, etc., for better aesthetic appearance in the offices.

Yes/No

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ItemNo.



Justification

l. Shall provide for three (03) Officers nominated by the Engineer suitable training, at the installed facility in Parliament on installation, testing, system configuration, trouble-shooting, operation and maintenance of the system installed

Yes/No

m. Equipment specified for rack mounting shall suitable for mounting on 19” EIA standard racks, and complete with necessary brackets, etc.

Yes/No

n. Shall provide permanent plastic tags or labels for equipment and cable terminations (at both ends) as marked in shop drawings.

Yes/No

o. Shall provide all brackets and accessories for mounting trunking works, wiring, piping, etc., for proper installation.

Yes/No

p. Shall develop As-Built Drawings for the system indicating all the installation details of the complete system and shall obtain approval from the Engineer before final submission (Three hard copies and one soft copy).

Yes/No

q. Shall request additional information, if required, for execution of works to the satisfaction of the Engineer as per the specifications.

Yes/No

r. Shall submit Operation and Maintenance Manuals, Test record Books, As-Built Drawings, Certificate of Guarantee, etc., before final handing over and Final Acceptance of the facility.

Yes/No

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ItemNo.



Justification

3. Variable Refrigerant Volume/ Variable Refrigerant Flow (VRV/VRF) System Specifications

a. Shall be microprocessor controlled, modular in design, air cooled, each with single outdoor condensing unit and multiple indoor units, and with individual set point control.

Yes/No

b. Shall be incorporated with microprocessor panel control for precise monitoring of status of the system. The electromagnetic interference & conversion losses shall be at minimum levels.

Yes/No

c. Shall have PC based central controller at AC Control Room. Yes/No

d. Shall provide software (installed and back up copy in CD or DVD including license, etc.) with following control features as a minimum:1. Temperature of each AC space (group and individual monitoring).2. Number of indoor units and outdoor units working3. On / off control facility for each indoor unit.4. Temperature set point control of each AC spaces and/or for each indoor unit.5. On/Off control for each outdoor unit and 6. Time scheduled On/Off control for each indoor unit.

Yes/No

e. Each individual Outdoor/Indoor unit shall be factory assembled, wired, and tested and shall be shipped with initial refrigerant charge.

Yes/No

f. Shall deliver units to the site with the full shipping packaging and shall remove packaging at site in front of Engineer’s representative.

Yes/No

g. Shipping document including LC, Bills of Laden, Custom Clearing Documents, shall be forwarded (price information erased) to the Engineer at delivery for verification of serial numbers of units, etc.

Yes/No

4. VRV/VRF System Specifications – Outdoor Condensing Unit

a. Shall be fitted with compressors of highly efficient fully hermetic scroll/inverter type. Yes/No

b. Shall be of multiple compressor type with electronic controls, capable of loading and unloading to follow the variations on cooling loads, and capable of capacity control from 10% to 100% of rated capacity.

Yes/No

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ItemNo.



Justification

c. Shall have cooling fan motors with at least two speed operation to maintain constant head pressure control in all ambient temperatures and modes of operation

Yes/No

d. Shall be in outdoor type weatherproof casing of galvanized sheet steel construction with powder coated finish.

Yes/No

e. Shall be with following safety devices/features:1. Pressure relief device/switch, 2. Short circuit protection fuses/MCB,3. Over current protection,4. Crank case heater, and fusible plug.5. Oil recovery system to ensure stable operation for systems with long refrigerant piping.

Yes/No

5. VRV/VRF System Information – Outdoor Unit

a. Country of Origin / Country of Manufacture

b. Make and Model Number

c. Cooling capacity (BTU/Hr or kW) Unit # 1

Unit # 2

Unit # 3

d. Number of Compressors

e. Overall Dimension

f. Compressor 1. Model2. Type3. Suction Pressure4. Discharge Pressure

g. Name of Refrigerant

h. Power Requirement at full load (kW)

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ItemNo.



Justification

6. VRV/VRF System Specifications – Indoor Units

a. Indoor units shall be Ceiling Suspended or Ceiling Cassette type including wired remote controllers (Group or Individual) as shown in drawings.

Yes/No

b. Indoor units shall be fitted with direct driven multi-blade type blower, statically and dynamically balanced to ensure low noise and vibration free operation. The noise level shall not exceed 50 dBA at 1m distance.

Yes/No

c. Indoor units shall be provided with auto swing type supply air louvers capable of providing continuous swing operation, blow direction suitable for respective location.

Yes/No

d. Ceiling Cassette type indoor units shall be provided with condensate drain water pump to lift the water to the drain piping as appropriate.

Yes/No

7. VRV/VRF System Information – Indoor Unit


b. Make and Model Number

c. Cooling Capacity (Tr / kW)(Please indicate capacities against each unit)

Unit IU-01 Unit IU-02 Unit IU-03 Unit IU-04





Unit IU-21 Unit IU-22 Unit IU-23 Unit

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IU-24

e. Overall Dimension

f. CFM

ItemNo.



Justification

8. Refrigerant Piping and Pipe Insulation

a. Shall use refrigerant quality hard drawn, seamless copper tubes with brazed connections and appropriate distribution joints, and headers.

Yes/No

b. Shall use Refnet joints supplied by VRV/VRF manufacturer where required or recommended. Yes/No

c. Shall keep all pipe ends sealed to keep the entire pipe works clean and free from contamination until immediately prior to making a joint.

Yes/No

d. Shall route the pipe work at site in such a manner that brazed joints are kept to a minimum. Yes/No

e. Shall install the distribution refrigeration pipe joints and headers in appropriate orientations to enable correct distribution of refrigerant.

Yes/No

f. Shall pressure test complete installation of refrigerant pipe work to hold 1.5 times of the working pressure, or 450 psi, which ever the higher, for a minimum period of 24 hours with dry nitrogen.

Yes/No

g. Shall evacuate to a vacuum pressure of -775 mm Hg to keep the entire refrigerant pipe work dehydrated for a minimum period of 4hrs.

Yes/No

h. Shall charge the refrigerant pipe work with additional refrigerant charge. Weight shall be calculated based on the actual length of the refrigerant pipe work. Shall obtain Engineer’s approval before refrigerant charging.

Yes/No

i. Shall carry out the refrigerant charging process with an appropriate charging station under the supervision of Engineer’s representative.

Yes/No

j. Shall insulate the refrigerant pipe work with slip on type closed cell Nitrile Rubber electrometric pipe insulation. Wall thickness shall be as per the manufactures’’ recommendation. Please specify the insulation wall thickness.

Yes/No Insulation Wall Thickness :

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k. Shall provide 25mm type 600 PVC condensate drain typing with moulded type fittings and with adequate slope for proper drainage.

Yes/No

l. Shall insulate the condensate pipe work with slip on type closed cell Nitrile Rubber electrometric pipe insulation of wall thickness 13mm, minimum.

Yes/No

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ItemNo.



Justification

m. Shall provide mechanical protection for exposed Insulation with Aluminium base cladding or covering.

Yes/No

n. Shall provide Powder Coated GI trunking of sheet thickness 1.2mm for enclosing pipe works as per the detail. Shall obtain Engineer’s approval for acceptable colour shade.

Yes/No

9. Information on Pipe Insulation


b. Make

c. Material Type

d. Conduction Coefficient

e. Thickness

10 DeskTop Controller for System Management – Lot 1

Make/Model No. (Bidder to Specify)

a. Shall be of reputed brand and locally assembled units are not acceptable Yes/No

b. Shall provide software for system management and control, pre-installed and back up copies. Yes/No

c. Intel Pentium core 2 quad processor with 2MB L2 cache and 800 MHz FSB, Original Windows 7 and Office 7 Operating System or better configuration

Yes/No

d. 2x2GB Dual Channel DDR2 SDRAM, 800MHz, or better Yes/No

e. 16X DVD +/- R/W optical drive Yes/No

f. 300GB, minimum Serial ATA hard drive Yes/No

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ItemNo.



Justification

g. Separate Video and Sound cards Yes/No

h. 17” LCD monitor with resolution of 1280X768 (WXGA) pixels with 16:9 aspect ratio Yes/No

11 Testing and Commissioning

a. Shall perform all tests necessary to ensure that the material and workmanship conform to the specifications and best industry practice.

Yes/No

b. Prices of individual items shall include cost for installation, testing & commissioning Yes/No

c. Shall have necessary test equipment and experienced manpower in similar works to carry out necessary installation, testing and commissioning.

Yes/No

d. Shall submit test protocols as per the standard specifications to the Engineer two weeks before the schedule date of testing.

Yes/No

e. Shall submit Test Certificates for all imported material and components such as insulation material, etc. Shall submit samples of material for the Engineer’s approval before installation / fixing.

Yes/No

f. Shall inspect all material, components, etc., such as pipe branches, elbows before fabrication and shall inspect all joints and connections before they are assembled in position.

Yes/No

g. Shall inspect and check entire pipe work for leakages, vibration and noise, after complete assembly. Yes/No

h. Shall include following test as a minimum on the complete installed system:1. Verify capability to deliver rated cooling capacity, power consumption at rated capacity, and

Coefficient of Performance (COP).2. Verify continuous and reliable operation as per the design intent. Test shall carry out for a

period of 72 hrs. minimum, continuously.3. All tests stipulated by the applicable standard specifications.

Yes/No

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ItemNo.



Justification

i. Shall submit Inspection and Test plan to the Engineer to enable him to deploy an representative for witnessing all the tests.

Yes/No

j. Shall submit test reports to the Engineer for approval before final handing over the installed facility and Final Acceptance of the facility.

Yes/No

12 Warranty, Spare parts and Special Tools

a. Shall guarantee the system for optimum operation and shall guarantee that the power consumption will not exceed the values given in technical data sheets at all load conditions.

Yes/No

b. Shall provide warranty and after sales service for a minimum period of 3 years after the date on complete commissioning and final acceptance.

Yes/No

c. Shall provide labour, transport and operational, replacement or any other spare part necessary during the entire warranty period to ensure satisfactory operation and minimum down time.

Yes/No

d. Shall provide necessary after sales, regular, breakdown and / or emergency servicing on the complete system free of charge during the entire warranty period.

Yes/No

e. Shall provide special tools necessary for servicing, operation and/or maintenance free of charge. Yes/No

f. Shall guarantee that the necessary spare parts will be available for a minimum period of ten years from the date of final acceptance.

Yes/No

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