supply, installation, testing and commissioning of air conditioning system with allied e.i. work at molecular lab ( department biochemistry ) at academic building of the calcutta national medical college, kolkata=2 supply of5 tr capacity concealed type split air conditioner having rated cooling capacity of 60000 btu / hr. with 02 nos twin rotary compressor , 2 nos iduof rated power supply 230v-1ph-50 hz, 1 no odu of rated power supply- 415 v, ± 5%, 50 hz. three phase ac supply.air flow / per idu-1000cfm ( make hitachi / o-general / daikin / voltas ) r410 eco friendly refrigerent. 3 erection and commissioning charges for the above mentioned 5.0 ton concealed type split air conditioner . incl charges for hanging arangments by 6 mm thick m.s u channel. 4 installation and commissioning of copper refrigerant piping, complete with fitting, elbows, bends, supporting arrangement on walls for liquid line 3 / 8 od with .7mm thick. ( make;ryoku ) 5 installation and commissioning of copper refrigerant piping, complete with fitting, elbows, bends, supporting arrangement onwalls for suction line 5 / 8 od with .7mm thick. ( make;ryoku ) 6 supply & fixing pipe insulation in liquid line 3 / 8 with 9mm nitrile rubber tube liquid line.incl charges for rapping the whole pipe. 7 supply & fixing pipe insulation in suction line 5 / 8 with 9mm nitrile rubber tube suction line incl. charges for rapping the whole pipe. 8 control copper cabling from condensing to unit and control panela ) 4 core 2.5 sq.mm communication cable ( havells / fonolex / mescab / kei ) 9 charges for drain pipe work incl charges 32mm dia pvc / hdpe harded pipes with insulation, fitting, accessories, bends, elbows, tees, flanges, tappings, wall sleeves, hangers, supports, anchors. and after the work cementing the same. ( supreme ) 10 supplying, fabrication & fixing 4 nos. m.s u-channel of 6 mm thick of size ( 75 mm x 40 mm x 40 mm ) of 1.2mtr+ 200 mm in grounting length for making platform for installation of outdoor unit of 5 tr ton concealed type split ac incl. drillingnos holesin each channel including cutting holes into the wall & grouting the same with cement concrete ( 1:1 ½ :3 ) etc. fabricated with horizontal angle of 25 mm x 25 mm x 3 mm including supporting angle 50 mm x50mm x 6 mminplatform in outer edge . area of the platform is2mtr. x 1.2mtr. the rectangular stucture will provide protective guard for outdoor unit by 12 sqmm square bar.minimum the protective guard size : wxdxh =1600x1200x 750 mm. for maintenance purpose .the gap between each 12 sq bar should be not more than 3 inch in pretective guard . 11 supply and fixing of horizonal support for indoor unit by ms angle of size of 50x50x6 mm and length of 4 ft ( 2 nos for each idu ) , total 4 nos .8 inch of one side of each angle grouted in inner wall of the room . 2 nos 10 / 12 mm hole should be done in every angle.angle should be painted by red oxide and enamel paint. ( note as the indoor unit are ceiling suspended and condition of the ceiling are not good , this arrangement for extra protection. ) 12 supply and fixing of al. powder coated continuous grill 13 part -ii, e.i 14 distribution wiring in 1.1 kv single core stranded fr pvc insulated & unsheathed copper wire ( havelles / finnolex ) in 20mm size pvc rigid conduit fr ( precision make ) incl. necy. fittings as required 15 a ) 4 x 84 / 0.3 ( 6 sqmm ) + 2 x 56 / 0.3 ( 4 sqmm ) ecc tpndb to ac 16 b ) 2 x 36 / 0.3 ( 2.5 sqmm ) + 1 x 22 / 0.3 ( 1.5 sqmm ) ecc for computer board & power board 17 supplyof 415v timer db ( equivalent of 2+12 way spn double door db in size ) with steel sheet enclosure double door, phosphitised powder coated, neutral bar, din rail with ip- 43 protection comprises with 1 no.40a fp mcb ( c curve, 10ka ) , 1 no.24 hours programming time switch ( l&t / aproved make ) with 15 min minimum switching time of any time and any day and 1no 32a 3pole contractor ( make- l&t / approved ) complete withinternal wiring by suitable sizze of copper wire and provision for earthing attachment including led indication light for running condition with locking arrangement & including on / off push button ( make- l&t / approved ) . 18 supply & fixing 240 v, 2 nos. 6a, & 2 nos. 20a plug socket with separate 2 nos. 6 a & 2 nos. 20a piano key type switch, indicator & 16a kit-kat flush type fuse ( brand approved by eic ) on sheet metal switch board embedded in wall incl. s & f 240x200x65mm ms ( 16swg ) switch board and bakelite / perspex top cover of 3mm thick by brass screws after making housing for switch by cutting bakelite / perspex cover and making necessary connections as required 19 supply & fixing 4 pole mcb enclosure with 1no. 415v 40 amp 4-pole mcb ( legrand / siemens / abb ) to be fixed concealed in wall & mending good the damages to original finish incl. painting, connection & provision for earthing attachment as per direction of e.i.c 20 supply & fixing 4 pole outdoor typeenclosure ( sintex - 3020 ) with 1no. 415v 40 amp 4-pole isolator ( legrand / siemens / abb ) to be fixed concealed in wall & mending good the damages to original finish incl. painting, connection & provision for earthing attachment as per direction of e.i.c 21 finishing of the pvc insulated wire ends by socketting with pin / ring type copper sockets and insulated tapes etc., including supplying sockets, tapes. 22 a ) 6 sqmm 23 b ) 4 sqmm