supply , installation and commissioning of hvac system in hella laboratory of electrical engineering department coep , section a: hi-side for inverter vrf system:supply of condensing unit for hvac system with scroll compressor , r410a , 28 hp -top discharge , supply of cassette type indoor unit for inverter v plus system , compact cassette , 2 . 0 tr 1- way cassette , 0 . 8 tr , cordless remote controller , cordless remote controller , section b: low-side for inverter v plus system: , supply & installation of refrigerant branch kit ( refnet ) , 28 hp , liftting shifting and installation of outdoor unit at first floor terrace level , installation of indoor units- cassette & hiwall , supply & installation of hard copper piping ( suction & liquid together-pair ) between outdoor and indoor units with 19mm thick nitrile rubber insulation for suction line and 13mm thick for liquid line along with support , supply & installation of pvc drain piping with 6mm thick nitrile rubber insulation , supply & installation of communication cable of between indoor unit and outdoor unit with pvc conduit . size: copper shielded cable - 0 . 75 sq . mm x 2 core , supply & installation of power cable for idu from nearest socket ( @ 3 rmt per idu ) , pressure testing , vacuumizing , commissioning and additional gas charging for 28 hp , supply & installation of ms fabricated stand for vrf condensing unit