Inter University Centre For Astronomy And Astrophysics Tender

Supply of VRV Outdoor system for Clean air Filtration unit with following items - Outdoor unit suitable for Power Supply Three Phase, 415 V, 50 hz, Ambient temperature: of 40 Deg C, R410a refrigerant with multiple inverter scroll compressor only, Minimum 2 Nos. of Compressor in each system having low noise condenser fans and with multi-connection piping kit, Digital pressure gauge kit, pipe size reducer kit etc. Compressors shall be equipped with invertor controller of insulated gate bipolar transistor. ODU - 12 HP with combination of DC Inverter scroll compressor and constant speed Hermetically sealed Scroll type compressor BTU not less then 114,000 Btu/h KW Not Less then 33 Kw Capacity Control - 15-100% Outdoor Unit Sound Level not more then 60 db at a point 1 M front of Unit at a height of 1.5 M. Air flow rate - 190 CuM per minutes minimum at High speed VRV Outdoor Static Pressure Not less then 75 Pa Outdoor Must Have Auto Gas Charging Function Outdoor units should be installed as per the site condition The control panel shall have incoming power MCCBs/ ELCBs/ MCBs as per VRV unit control panel specification. It should be possible to start and stop the unit from remote locations The outdoor unit shall be factory assembled, weather proof casing , constructed from heavy gauge GI sheets steel panels and coated with baked enamel finish. The outdoor unit shall be completely factory wired, tested with all necessary controls & filled with first charge of refrigerant before delivering at site. The minimum acceptable value of Coefficient of Performance (COP) of cooling of the offered system shall be not less than 3.27 at 100% rated load with 35 deg. C outdoor and 19 deg. C wet bulb conditions. The COP of cooling confirmation should be done by the OEM on their authentic letter head.

SITC of Temperature Control : The controller with multi communication cabling between AHU expansion Valves and outdoor units. A multi-functional compact centralized controller shall be provided with the system which shall be able to control the following function. 1) Starting, stopping of AHU or individual unit 2) Temperature setting of unit 3) Switching between temperature control modes, switching off fan speed and direction of air flow, enabling /disabling of remote controller operation. 4) Monitoring of operation status such as operation mode and temperature setting of AHU system, maintenance information, trouble shooting information. 5) Display of operation history. The controllers shall have wide screen user friendly colour LCD display and can be wired by a non-polar two wire transmission cable to a distance of 1Km.

Electronic Expansion Valve to control Temperature of clean Room having continues stability of 0.5 Deg Celsius with Inlet / Outlet Joining kit.

Imported distributive refrigerant Piping joints (T Shape joints, Y joints, branch headers etc., for suction line and liquid lines.

AHU Controller : Starter Panel with dedicated microprocessor based controller (BMS compatible with open protocol and preferably with BACnet / BACnet IP) with software duly downloaded as necessary and as described in the specifications and complete with ON/OFF push buttons with ON/OFF/Trip indications, NO-NC (non polarized) contacts for tripping on signal from fire alarm panel for operating above system with following features Microprocessor Controller shall provide following outputs minimum. 1. Dual Coil Operation Options 2. Chilled water valve operation status 3. AHU Airflow (CFM) 4. AHU power consumption 5. Chilled water in/out Temp. 6. Chilled water flow rate 7. Common Alarm 8. Integration with fire alarm to shut AHU incase of fire

VARIABLE FREQUENCY DRIVE SET : Supply, Installation, Testing and Commissioning of variable speed drives for AHU Fan Motor(s) with 1 No. dedicated microprocessor based controller with software duly downloaded, Adjustable frequency drives, differential pressure sensor/ transmitters as necessary and as described in the specifications and complete with: Integration with bypass mode for Normal starter operation. VFD shall be IP-20/21 suitable to be housed in AHU Starter Panel.

Supply , installation, commissioning and testing of Mid Static 3.5 Ton Ductable ceiling concealed type airconditioning unit with eco-friendly refrigerant gas, drain pump, control unit etc. and having indoor and outdoor with following specifications - Rated Capacity - 3.5 TR Rated power supply - 1Ph/230V/50 hz Scroll Compressor and Controller Rated power input - Not higher than 4250 Watt Indoor Air flow rate - Not less than 1400 CFM Indoor Noise Level below - Not higher than 53 dbA Static Pressure Not less then 42 Pa

Supply, Installation, Testing and commissioning of 5 Star Rated Inverter Hiwall Split AC Units 1.8/2 TR capacity with refrigerant gas & Rotary compressor consisting of - (1) Condensing unit with reputed make hermetically sealed Rotary compressor, air cooled condenser with copper Tubes, extended aluminium fins and condenser fan with adequate air flow capacity suitable for operation at ambient temp. of 45 deg C. (2) Indoor unit consisting of 3/4 row-cooling coil blower with motor, filters, drain pan & casing. The evaporator shall be complete with expansion valve & distributor. Sound pressure level of indoor unit should be not more than 45/32 db (hi/low). Room Temperature Display at Indoor Unit required. (3)The minimum acceptable value of annual power consumption of the offered Split AC model shall be not higher 960 watt. (4) The outdoor unit shall be factory tested and filled with first charge of refrigerant R-410A before delivering at site. (5) Necessary charge of oil and refrigerant gas as required up to handling over & warranty period of the system. (6) Interconnecting piping between evaporator and condensing units as per site requirement insulated suction line & liquid line for all the circuits of one machine. The suction lines shall be insulated with closed cell Nitrile rubber tube insulation. (7) The units shall be with individual cordless remote. (8) The units shall be suitable for operation on 220/240 Volts, 1 ph., 50 Hz, 3 wire A.C. supply. (9) MS structural work and special supporting structure for condensing units, duly epoxy painted with 2 coat. (10) Core Cutting in beam/wall 4" dia and apply the fosrock waterproofing material wherever required.

AIR DISTRIBUTION : Sheet Metal Ducting - Factory Fabricated Rectangular Ducting in Galvanised Steel with 100% M.S Flanges Supply, fabrication, installation and testing of GSS metal ducts as per IS-277 (180 GSM both sides, LFQ & confirming to Class VIII) for GS Sheets and IS-655 for fabrication of following thicknesses including accessories, vanes, 3 mm neoprene rubber gasket etc. complete as per specifications & approved shop drawings. No slip joints shall be allowed. Flanges shall be Rolamate or equivalent and ducts upto 1500 mm width shall be with rigid support (Gripple support to be provided wherever required) as per technical specifications. Ducts to be sent in Fully Factory fabricated and in boxed form. The factory fabricated ducts shall be of pre-approved make only. The quoted costs should include: i) Ducts with reinforcement/ strengthening ii) Air tight joints iii) Accessories such as splitter, damper, guide vane etc. iv) Hangers and supports (Gripple Supporting method to be used wherever required) v) Painting with Black colour paint for duct sides behind the grills. vi) The gasket used in case for all ducts shall be fire retardant type vii) Ducts shall be fully sealed with Silicon Sealant for leak tight installation. Ducts shall be leak pressure tested & leakages should be within acceptable limits as specified at Min. 500 Pa 0.80 mm (22 SWG) GSS ducting (751mm-1500mm)

AIR DISTRIBUTION: Sheet Metal Ducting - Factory Fabricated Rectangular Ducting in Galvanised Steel with 100% M.S Flanges Supply, fabrication, installation and testing of GSS metal ducts as per IS-277 (180 GSM both sides, LFQ & confirming to Class VIII) for GS Sheets and IS-655 for fabrication of following thicknesses including accessories, vanes, 3 mm neoprene rubber gasket etc. complete as per specifications & approved shop drawings. No slip joints shall be allowed. Flanges shall be Rolamate or equivalent and ducts upto 1500 mm width shall be with rigid support (Gripple support to be provided wherever required) as per technical specifications. Ducts to be sent in Fully Factory fabricated and in boxed form. The factory fabricated ducts shall be of pre-approved make only. The quoted costs should include: i) Ducts with reinforcement/ strengthening ii) Air tight joints iii) Accessories such as splitter, damper, guide vane etc. iv) Hangers and supports (Gripple Supporting method to be used wherever required) v) Painting with Black colour paint for duct sides behind the grills. vi) The gasket used in case for all ducts shall be fire retardant type vii) Ducts shall be fully sealed with Silicon Sealant for leak tight installation. Ducts shall be leak pressure tested & leakages should be within acceptable limits as specified at Min. 500 Pa 1.00 mm (20 SWG) GSS ducting (1501mm-2250mm)

Volume Control Dampers : Supply, installation and adjusting of GSS Volume Control Damper within ducts complete as specified and with suitable links, levers. Blades should be opposed blade type. The blades should be mounted in nylon bushes operated by an interior wheel gear system. Manual quadrant control with position indicator to be provided to enable adjust volume of air as required.

Fire and Smoke Dampers : Fire and Smoke Dampers (FSD) shall be installed in supply air duct when they pass through AHU room walls as per specifications. The Fire Dampers shall be operated with at least 90 minutes fire rating as per UL-555S-Class I for fire and smoke management rated for 90 min. and UL Stamped. Fusible Link should be rated for 72oC. Each FSD shall be of multi leaf type, low leakage and shall be tested in the factory and will be certified by the manufacturer in form of the test certificate. Each FSD shall be supplied with matching extended sleeve (factory supply) and set of retaining angles for installation on wall / slab as indicated on specifications. [up to max size of 1200 mm x 350 mm - This duct size is given as guideline for estimate]. Fire Dampers shall be provided with access doors in ducts / false ceiling. Fire and Smoke Dampers - Suitable for Motorised Actuator

Motorised Actuator for item B-3.1 : The Actuator shall be direct coupled spring return type and motorised. The Actuator shall be in line with the Technical Specifications and shall be maintenance free direct coupled spring return type 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. Shall have manual over ride facility. The selection of actuator size shall be the responsibility of the manufacturer. Power on indicating lamps with 230 V / 24 V transformer, damper close & open indication, reset push button, push button for manual running of actuator for periodic inspection, auxiliary contacts 24V & 230 V, contact points to receive signal from smoke detector / fire alarm panel etc. should be provided.

Double Canvass Connection : Supply, fabrication & installation of double canvass (fire retardant) flexible connection as per specifications.

Refrigerant Piping : Supply, Installation, testing and commissioning of the insulated refrigerant piping for all the units with the refnets as per the specs. The insulation shall be of 19mm thick Armaflex make through out the running length of the refrigerant piping. The piping with GI tray shall be well supported at specific intervals with anchor fasteners. Both refrigerant suction and liquid line shall be insulated. 28.8 (11/8) or as per Manufacturer's specifications

Refrigerant Piping : Supply, Installation, testing and commissioning of the insulated refrigerant piping for all the units with the refnets as per the specs. The insulation shall be of 19mm thick Armaflex make through out the running length of the refrigerant piping. The piping with GI tray shall be well supported at specific intervals with anchor fasteners. Both refrigerant suction and liquid line shall be insulated. 34.4 (15/8) or as per Manufacturer's specifications

Refrigerant Piping : Supply, Installation, testing and commissioning of the insulated refrigerant piping for all the units with the refnets as per the specs. The insulation shall be of 19mm thick Armaflex make through out the running length of the refrigerant piping. The piping with GI tray shall be well supported at specific intervals with anchor fasteners. Both refrigerant suction and liquid line shall be insulated. 19.1 (5/8) or as per Manufacturer's specifications

Refrigerant Piping : Supply, Installation, testing and commissioning of the insulated refrigerant piping for all the units with the refnets as per the specs. The insulation shall be of 19mm thick Armaflex make through out the running length of the refrigerant piping. The piping with GI tray shall be well supported at specific intervals with anchor fasteners. Both refrigerant suction and liquid line shall be insulated. 22.2 (7/8) or as per Manufacturer's specifications

Refrigerant Piping : Supply, Installation, testing and commissioning of the insulated refrigerant piping for all the units with the refnets as per the specs. The insulation shall be Armaflex make through out the running length of the refrigerant piping. The piping with GI tray shall be well supported at specific intervals with anchor fasteners. Both refrigerant suction and liquid line shall be insulated. Copper piping for split unit with 13mm thick insulation

WATER DISTRIBUTION: For Coil 2 : Chilled Water Piping Supply, fabrication, assembling, laying, testing and balancing of chilled water piping using Mild Steel Heavy Duty "C" Class Pipes as per IS 1239 Part A & B & IS 3589 with all heavy duty fittings such as bends, elbows, tees etc. and complete with vibration isolators, hangers, full round PU supports as per specifications. The chilled water piping on terrace and outside of the HVAC Plant room shall be suitably supported for proper head room clearance. This supporting arrangement shall be included in the respective pipe sizes and no additional measurements / costs shall be considered. 50 NB ….[ thick. as per IS 1239 - heavy duty]

Valves : Supply, installation, testing & commissioning of heavy duty valves PN-16 rated for all valves, as specified and complete with: a) Flanges for valves above 50 mm dia and screwed ends with flanges for valves below 50-mm dia. b) Additional supports c) Nuts, bolts, gaskets etc. d) with ports for balancing valves only Butterfly Valves : 50 mm butterfly valves

Valves : Supply, installation, testing & commissioning of heavy duty valves PN-16 rated for all valves, as specified and complete with: a) Flanges for valves above 50 mm dia and screwed ends with flanges for valves below 50-mm dia. b) Additional supports c) Nuts, bolts, gaskets etc. d) with ports for balancing valves only Ball Valves : 25 mm ball valves

Valves : Supply, installation, testing & commissioning of heavy duty valves PN-16 rated for all valves, as specified and complete with: a) Flanges for valves above 50 mm dia and screwed ends with flanges for valves below 50-mm dia. b) Additional supports c) Nuts, bolts, gaskets etc. d) with ports for balancing valves only Non Return Valves [NRV] / Check Valve : 50 mm NRV

Valves : Supply, installation, testing & commissioning of heavy duty valves PN-16 rated for all valves, as specified and complete with: a) Flanges for valves above 50 mm dia and screwed ends with flanges for valves below 50-mm dia. b) Additional supports c) Nuts, bolts, gaskets etc. d) with ports for balancing valves only Y Strainer : 50 mm NRV

Valves : Supply, installation, testing & commissioning of heavy duty valves PN-16 rated for all valves, as specified and complete with: a) Flanges for valves above 50 mm dia and screwed ends with flanges for valves below 50-mm dia. b) Additional supports c) Nuts, bolts, gaskets etc. d) with ports for balancing valves only Manual Balancing Valves : 65 mm Balancing Valve

3 way Motorised Valve - ON/OFF type (at Chiller outlet) Supply, installation, testing & commissioning of heavy duty valves as specified and complete with : a) Flanges for valves above 50 mm dia and screwed ends with flanges for valves below 50-mm dia b) Additional supports c) Thermostat, 100VA -transformer, mounting plate etc. d) Union, nut bolts, gaskets or any other special fittings as required. e) With Controller, Sensor, Thermostat, Mounting Brackets etc. 50 mm 3 way motorised valves

Miscellaneous Control : 25 mm Air release valve

Miscellaneous Control : 25 mm Auto Purge valve

Instruments and Indicators : Supply and installation of instruments and Indicators as specified a) Pressure gauges with gauge cocks-1/2" Pressure gauge 6" dial (range 0-10kg/cm2g)

Instruments and Indicators : Supply and installation of instruments and Indicators as specified a) Thermometers with thermowells Thermometers Dial type - 6" dial (range 0-50deg.C)

Hard PVC Piping (AHU Drain) : Supply, installation & testing of Hard PVC drain piping with U traps, elbows, bends, tees, cleanouts etc. The piping shall be suitably insulated with 19mm thick, Physically crosslinked polyolefin foam with factory laminated heavy duty and ultra tough multi-layered composite aluminium foil facing with puncture resistance of 400N as per ASTM D4833 and Class 0 fire properties as per BS 476 Part 6 & 7 and as per the specification. 32 mm dia

Hard PVC Piping (AHU Drain) : Supply, installation & testing of Hard PVC drain piping with U traps, elbows, bends, tees, cleanouts etc. The piping shall be suitably insulated with 19mm thick, Physically crosslinked polyolefin foam with factory laminated heavy duty and ultra tough multi-layered composite aluminium foil facing with puncture resistance of 400N as per ASTM D4833 and Class 0 fire properties as per BS 476 Part 6 & 7 and as per the specification. 25 mm dia

MS structural work and special supporting structure for condensing units, duly epoxy painted with 2 coat. Cantilever Outdoor Stand for 3.5 Ton Compressor unit

MS structural work and special supporting structure for condensing units, duly epoxy painted with 2 coat. Cantilever Outdoor Stand for 2.0 Ton Compressor unit

INSULATION WORKS : Thermal Insulation of Piping, Valves etc. Supply, installation and testing of insulation for chilled water piping insulation, complete with bends, elbows, tees, duly insulated with RESIN BONDED PIPE SECTION - Duly insulated with 80 kg/cum density resin bonded fiber glass pipe section insulation covered with a layer of 120 gm/sqm polythene sheet (vapour barrier) and finally applying 0.56 mm aluminium sheet cladding complete with type3 , grade 1 roofing felt strip (as per IS:1322 as amended up to date ) at joints and repairing of damage to building etc. as per specifications and as required. 50 NB with 32 mm thick

Thermal Insulation of Ducts : Supply, fabrication & Installation of thermal insulation on GI ducts complete with Physically crosslinked polyolefin foam with factory laminated reinforced aluminium foil facing with EPDM fire properties as per BS 476 Part 6 & 7 as per the specification. The insulation joints shall be sealed with 3" wide Fire resistance tape. 19 mm thick Insulation

Acoustic Lining of Ducts : 15 mm thick acoustic insulation physically crosslinked open cell polyolefin foam with reinforced aluminium foil facing meeting class 0 as per BS 476 Part 6 & 7 and meeting NRC of 0.4 as per ISO 356. w, Stuck to inside of duct walls with manufacturer recommended adhesive / 520 bonding. Insulation material shall be antifungal.

Electrical Cabling Earthing, Terminations & Lugging for AHU system Cables shall be as per Technical Specifications and XLPE insulated type armoured with overall PVC sheath unless otherwise stated. Power cabling of copper armoured cable from control panel to motor with double compression gland & Copper armoured Control cabling with hook up to its controller. (i.e.. Control cabling for 3 way valve operation between sensor, controller, transformer and actuator to be included) Cabling rate to include end terminations, termination, lugging etc. as per specifications. All structural / supporting work, cable trays to be included in vendors scope of work. Control Cabling & Termination for each Chiller upto the control panel. Control Cabling & Termination for each Pump upto the control panel. Power cabling from panel upto respective Chiller. Power cabling from panel upto respective pump. Cabling & looping for fire damper and tripping of AHU / Fan motors based on fire signal from FAS panel. 4C x 10 sq.mm Cu. armoured conductor cable, as per specs.

Electrical Cabling Earthing, Terminations & Lugging for AHU system Cables shall be as per Technical Specifications and XLPE insulated type armoured with overall PVC sheath unless otherwise stated. Power cabling of copper armoured cable from control panel to motor with double compression gland & Copper armoured Control cabling with hook up to its controller. (i.e.. Control cabling for 3 way valve operation between sensor, controller, transformer and actuator to be included) Cabling rate to include end terminations, termination, lugging etc. as per specifications. All structural / supporting work, cable trays to be included in vendors scope of work. Control Cabling & Termination for each Chiller upto the control panel. Control Cabling & Termination for each Pump upto the control panel. Power cabling from panel upto respective Chiller. Power cabling from panel upto respective pump. Cabling & looping for fire damper and tripping of AHU / Fan motors based on fire signal from FAS panel. 4C x 6 sq.mm Cu. armoured conductor cable, as per specs.

Control cabling : All Cabling rates to include End terminations as per specifications. Cables shall be as per Technical Specifications and XLPE insulated type unless otherwise stated. 2C x 1.5 sq.mm Cu. Armoured conductor cable, as per specs.

Control cabling : All Cabling rates to include End terminations as per specifications. Cables shall be as per Technical Specifications and XLPE insulated type unless otherwise stated. 4C x 1.5 sq.mm Cu. Armoured conductor cable, as per specs.

Cable Trays : Supply and installation of GI perforated type cable trays of the following sizes fabricated out of perforated hot dip galvanised MS sheets of minimum 2 mm thick with 75 mm flange to be installed horizontally or vertically. The cable tray shall be complete including cost of bends, elbows, cross, tees, reducers etc as per site condition and rate shall include cost of anchor fasteners, screws, nuts, bolts and misc. other fixing hardware painting of support structure etc as required. i) Structural steel such as ISMC, ISA, flats, rods etc to be used for support shall be included in this item. ii) The cable tray shall be factory built. Bidder shall include in his price, required numbers of Tees, Crosses, Bends, Elbows etc as required as per actual site conditions. Ladder Type G.I. Cable Tray with GI Supports : 200 mm

REMOVAL OF EXISTING CHILLER SYSTEM : Dismantling and removal of existing AHU unit with chill water piping, valve station, existing ducting with all fixtures , electrical panel , electrical cables, cable trays, and other accessories. Making of proper closing arrangements of water inlet pipes with proper flange/ gaskets/end caps. Shifting of all the removed equipments/material at suitable place at ground floor near AC plant and will stored properly at one place.