Inter University Centre For Astronomy And Astrophysics Tender

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 or as per manufacturer's requirements.

Testing, Commissioning and balancing of 20 HP X 3 Nos VRV/VRF system with existing AHU as per site requirements. The entire new VRV system with the existing AHU should be operated and monitored continuously for 72 hours after satisfactory installation.

Supply, Installation, testing and commissioning of the insulated refrigerant piping for all the units with the refnut 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

Scaffolding for external work upto building terrace area

SITC of suitable Electronic Expansion Valve kit with control box to control Temperature of AHU having continues stability of 1.0 Deg Celsius with Inlet / Outlet Joining kit.

Supply, Installation, testing and commissioning of the insulated refrigerant piping for all the units with the refnut 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. 41.1 (15/3) or as per Manufacturer's specifications

Cat (B) - Buy Back Items

Lifting, Shifting , Rigging of all outdoor units, Pipes etc. up to building terrace area with required equipments

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

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. Perforated Type G.I. Cable Tray with GI Supports and cover Size - 300 mm X 75 mm. 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.

Dismantling of existing HVAC system (Compressor (Chillers), Motors, Pumps, Cooling Tower with water and refrigerant piping, Cables etc.).

MS structural work and special supporting structure for condensing units, duly epoxy painted with 2 coat.

Electrical Cabling Earthing, Cable Glands, End terminations & Lugging for VRV system. Cables shall be as per Technical Specifications and XLPE insulated type, 1.1 Kv armoured with overall PVC sheath unless otherwise stated. 4C x 10 sq.mm Cu. armoured conductor cable

Flushing, Cleaning and Drying of existing AHU Coil (Inner side of Refrigerant pipes and fins) with suitable cleaning agent. Please note that the refrigerant gas used for existing HVAC systems is R-22. The inside of the AHU coil refrigerant piping must be cleaned and dried before connecting to the new VRV system.

Supply of VRV air conditioning system comprising of the following items - Outdoor unit suitable for Ambient temperature of 35 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 (IGBT), Make - Mitsubishi / Daikin / General / Trane/ Hitachi. ODU - 20 HP capacity with combination of DC Inverter scroll compressor and constant speed Hermetically sealed inverter Scroll type compressor only having Piping connection liquid pipe 15.9 mm, gas pipe 28.6 mm. BTU not less then 1,91,000. Air flow rate - Above 290 CuM per minutes minimum at High speed. Outdoor Must Have Auto Gas Charging Function. Capacity Control - 15-100%. Outdoor Unit Sound Level not more then 65 db at a point 1 M front of Unit at a height of 1.5 M. 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 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. Outdoor units should be installed as per the site condition.

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 13 mm thick insulation

Cat (A) -Items to be supply and installation

Supply, Installation, testing and commissioning of the insulated refrigerant piping for all the units with the refnut 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 Gas Charging/top up with vacuuming, pressure testing, Leak testing etc.