Raja Ramanna Centre For Advanced Technology Tender

AHU with VRF condensing unit etc.: Design, Supply, installation, testing & commissioning of Air Cooled Variable Refrigerant Flow type multi unit airconditioning system with both Heating and Cooling Option.

VRF Outdoor Units: Design, supply, lifting, shifting, installation, testing & commissioning of 24 HP Modulating Outdoor / Condensing units with both Heating and Cooling Option complete with hermetically sealed DC Inverter Scroll Compressors, Condenser coils, variable speed condenser fan with motor, Microprocessor Controller etc. The unit shall include the necessary expansion & communication kits compatible for connection of VRF outdoor units with AHU in single / multiple form. The units should be operated on Refrigerant - R410A. The condensing units will be installed at suitable place for compact run of piping along with MS raised stand with vibration isolation pads. All other details are as per enclosed technical specifications.

Air handling unit: Design, fabrication, supply, installation, testing & commissioning of air handing unit (Thermo-acoustic panel thickness of 48mm+/-2mm) with thermal break profile complete with aluminium extruded framework structural section for VRF condensing units as per tender specification. Thermo-acoustic panel shall be comprising of 23±2mm thick thermal insulation of 40kg/m3 density PU foam injected between 0.8mm pre-coated outer GI sheet and 0.8mm plain GI intermediate sheet, followed by laminated tissue panel glass wool insulation of 23±2mm thickness having 70-80 kg/m3 density sandwiched between intermidiate sheet and inner skin of 0.8mm perforated GI sheet. a. Mixing chamber for Fresh Air & Return Air with volume control dampers. b. Pre filter section with 10 micron Pre filter of 90 % efficiency. c. Cooling coil section with 6 rows deep cooling coil suitable for VRF condensing units with both Heating and Cooling option, necessary Expansion & Communication Kits compatible for connection of VRF outdoor units in single / multiple form along with S.S. drain pan and drain outlet. d. UV lamps e. BMS compatible re-heater with thyristor control f. Humidifier section complete with required water heaters, float valve,low water level safety switch, piping and necessary fittings. g. Blower section with statically and dynamically balanced direct driven centrifugal blower h. Squirrel cage induction motor (with VFD) of TEFC type suitable for 3 -phase, 415V, 50Hz of efficiency class IE3. The winding of motor shall be class 'F' insulated and fully tropicalised, motor shall be rated for continuous duty as defined in IS: 325 for blower with adjustable base frame, fitted on a common extruded Aluminium channel using anti vibration mountings for silent and vibration free operation. i. BMS compatible temperature sensor and RH sensor with transmitter unit and associated cabling, differential pressure switch, Airstat etc. j. Flanged connection at the outlet of AHU with volume control damper for integrating to the main duct lines. k. Motorised Volume control damper and NDIR type CO2 sensor with transmitter for controlling the fresh air l. Fire retardant flexible connections with zipped port. m. Suitable inspection doors for filter, coil & blower sections. n. Suitably rated antivibration (Cushyfoot) mountings for AHU installation. Including all other components and accessories required for proper operation of AHU and to achieve required temperature (25 ± 2˚C) and humidity (50 ± 10 %) as per specifications and drawing in following capacity: AHU/17000 CFM /38 TR /60 mm WG. S.P.