Department Of Atomic Energy Tender

DX - AHU with condensing unit: Providing, installing, testing and commissioning of 17 TR capacity, 6800 cfm, 65 mm of W.C static pessure, micro processor controlled Direct Expansion ( DX) type modular type SS 304 Double skin horizontal floor mounted air cooled Air Handling Unit (DSAHU). AHU comprising of mixing box & pre filter section with return and fresh air dampers, pre filter, Direct Expansion (DX) type refrigerant circulated cooling coil of 17 TR capacity, eliminators, fan section, heater, empty plenum sections, inner section shall be SS 304 and polished , etc., as per technical specification. The AHU indoor unit and outdoor units are connected by copper refrigerant piping, communication cable and electrical cable.The outdoor (condensing unit) unit of 17 TR capacity ( each 8.5 TR x 2 Nos.) shall comprising of hermetically sealed scroll compressor of each 8.5 TR capacity with gas cooled motor to operate at 415 V, 3 ph, 50 Hz power supply , operating on R 410A refrigerant . The condenser coil shall be fabricated of seamless hard drawn internally grooved copper tubes and aluminium fins (with anti corrosive blue fins). Each DX cooling coil shall be 4 row deep of 17 TR capacity double circuit ( 8.5 TR X 2 Nos.) with suitable 3 phase fan motor etc., as per technical specification (NOTE: DX AHU fan mounting with belt drive). The fan unit and motor are fixed to a frame isolated from the structure of AHU by rubber vibration absorbers. The fan is double inlet, double width (DIDW) type centifugal fan. The fan blades are backward curved made of aluminium. The motor shall be 3 phase, class F, TEFC, IP 55 are fitted with internal thermal protection etc., all complete as per specification, scope of work and as directed by Engineer -in- Charge.

Providing and installation of seamless annealed hard drawn copper pipes and fittings like, bends, couplings, etc, shall be interconnect between indoor and outdoor unit for suction and discharge connections conforming to ASTM B 280 -03 standards etc., all complete as per specification and as directed by Engineer -in- Charge.

Suction line copper tube OD : 1 1/8" (28.60 mm) with 1.27 mm wall thickness.