supply installation testing and commissioning of 07 nos. ac at different places of wridd dept. at 5th floor of block-a,khadya bhawan ,11a mirza ghalib street ,kolkata-87.- 1 supply ,delivery ,testing & commissioningof split type ac machines having capacity cooling capacity range (6.6 kw to 7.0 kw), with fixed speed rotary compressor, refrigerant gas r32/r410 bee star rating -3 (eer range 3.5 to 3.9), air-flow range cfm(780-850), both condenser and cooling coils made of copper tube connecting chord with plug topconfirming to isi 1391 (part-i & part-ii) with all amendments.(make-mitsubishi electric/ o-general/mitsubishi heavy duty) 2 installation, testing, commissioning of above mentioned 2.0 tra.c. machines both indoor and outdoor unit. 3 supply,installation & commissioning of hard copper refrigerant piping, complete with fittings elbows, bends, supporting arrangement on walls incl wrapping with kenofoam sulation by 26 swg aluminum sheet to make it vermin proof.for ductable split a.c.a) liquidline hard cu, pipe minimum thickness 1.15 mm. following dia .[ make royku / totaline/ mandeep] with 13 mm. thick nitrile tube insulation.[ make aroflex / acoflex]6.35(1/4) od with 0.6 mm thick liquid line. 4 b) gas line hard cu, pipe minimum thickness 1.15 mm. following dia .[ make royku / totaline/ mandeep] with 13 mm. thick nitrile tube insulation.[ make aroflex / acoflex] 15.9 (5/8”)mm dia 0.6 mm suction line. 5 supply & laying pvc drain pipe 25mm dia with 6mm thick nitrile rubber insulation (make- supreme/oriplast) 6 supply and laying of 1.1kv grade copper armoured round cable of the following sizes from idu to odu for above mentioned ac machines(make polycab/havells/gloster/ finolex) 7 3 core 2.5 sqmm