corrigendum - supply , installation , testing and commissioning of 2 . 0 tr split air conditioner machine ( 4/5 star ) - qty . 28 nos . and 1 . 5 tr split air conditioner machine ( 4/5 star ) - qty . 6 nos . at indian institute of management ahmedabad . , cat ( a ) -items for supply , installation , testing and commissioning , supply , installation , testing and commissioning of split air conditioner 2 . 0 tr , 4/5 star as per the technical specifications . ( specifications as per details in technical bid sheet - annexure -c ) , supply , installation , testing and commissioning of split air conditioner 1 . 5 tr , 4/5 star as per the technical specifications . ( specifications as per details in technical bid sheet - annexure -c ) , supply of additional copper tubing ( including outdoor-indoor cable & its insulation ) for above item , as per site requirement . ( approx . length -200 mtrs ) , cat ( b ) - buy back items , buy-back ( ie minus ) dismentaling & buyback of the existing running split air conditioner 1 . 5 tr , make-bluestar/ hitachi including its accessories and having copper pipes of length varying from 5-20mtrs . ( iima will generate invoice for the buy back items as per prevailing gst rate )