Supply Installation Testing and Commissioning of Evaporative Air Cooling Plant for Departmental Canteen at CSIR NEERI Nagpur

EVAPORATIVE COOLING: Supplying, Installation, Testing and Commissioning of factory assembled double skin central evaporative cooling plant having specifications as per A, B, C, D, E, F,G A. Air washer section comprising 50 mm thick pre-air filter made out from washable Aluminium wire mesh filter with 90 % down to 10 microns. B. Humidification section comprising of Wet pads 200 mm thick impregnated cellulose paper media (Celdec pads) of imported origin with two (2) bend PVC eliminator, internal casing with blank off's of wet section in SS-304 construction. C. Fan Section comprising of belt driven, Double Inlet Dounle Width (DIDW) backward curved fan with outlet velocity less than or equal to 10 m/s and minimum efficiency of 70% Air Movement & Control Association International (AMCA) certified centrifugal fan suitable for required cfm at 50 mm WC static pressure. D. Totally Enclosed Fan Cooled (TEFC) motor of IE-3 class as required with pulley, belt. E. The unit shall be fabricated with frame work hollow extruded aluminium profile with 0.80 mm precoated GSS on outside and on inside complete with 25 mm thick Chloroflouro Carbon (CFC) free Polyurthane Frame (PUF) insulation of minimum 40 kg/cum density sandwiched in between inner and outer skins, SS -304 (18 g) Sump tank, 25mm C-PVC piping, make up, drain & quick fill and drain connection, Butterfly/Gate valves for pumps, make up, drain & quick fill and drain connections of sump, 2 no. Pumps of suitable capacity and necessary fittings, stand, anti vibration pads etc.as required.

F. Starter panel DOL/Star-Delta suitable for operation of Blower motor & pump made out of 1.6 mm thick sheet steel powder coated enclosure comprising of over load protection relay, short circuit & single phasing protection, ON / OFF push buttons, ammeter, voltmeter, indicating lamps, MCB, contactor etc. (As per Specification of CPWD & direction of Engineerin-charge) complete in all respect. G. All as per pre approved by Engineer-in-charge. Air Flow Capacity: 10000 CFM Note: Rate should be quoted by the bidder considering the Buy-back value of old existing Air Coolers (Cooler Size: 6 Feet x 6 Feet x 5 Feet Approx., Top air discharge, Cooler Body material: Galvanized steel sheet, Four side wood wool cooling pads, Fan Motor: 1.2 KW, 3 Phase, 700 RPM, Sweep: 915 mm). Bidder can request for physical inspection of coolers before the submission of bid

FLEXIBLE DUCT CONNECTOR: Supply and fixing of Flexible Duct Connector made up of flame retardant fabric secured to galvanized sheet metal on either side by a double lock seam inserted between the equipment/Air duct and the ductwork to provide a wear resistant, Air tight flexible connection to eliminate noise, vibrations and rattles between cooler and duct etc. as per following technical specifications GSM: 360, Tensile Strength (N/cm): 970 x 947, Tear strength (N): 29 x 29, Fire Rating: EN 532, EN 533 etc. including dismantling of existing flexible duct connector piece and complete as per site requirements

MODIFICATIONS IN COOLER PLATFORM: It includes cutting of Guardrails, Size: Length: 9 Feet x Width: 8 Feet and Height: 3 Feet approx. made up of hollow rectangular section (Size: 50 mm x 30 mm), Material: Steel, Total nos. Cutting Points: 18, Equipment platform using appropriate Tools/Machinary as per requirement and without damaging the basic structure of Equipment Platform and refitting of removed portion of Guardrails (if required) by welding joints complete as required for the safe installation of new Evaporative cooling plant in place of old Air Cooler.

LIFTING AND POSITIONING OF EVAPORATIVE AIR COOLING PLANT: Lifting and Shifting of Old (Existing) and positioning of Newly supplied Evaporative Air Cooler (Max. Lifting Height: 20 Feet above Ground Level) using hydraulic crane or Chain Pully on existing Fabricated Platform complete as required

CLEANING AND DISINFECTION OF AIR DUCT: Cleaning of air duct parts i.e. Plenum, Main Duct, Branch Duct etc. from inside by using agitation devices like brush, Vaccum cleaner, Compressed Air Nozzles, Water Jet Spray nozzles, including dismantling and refitting of false ceiling tiles and Supply Air Grills to create the access for cleaning of Air duct from inside and disinfection of complete air duct using recommended disinfectant solutions and complete as required