bids are invited for supply, installation, testing and commissioning of air cooled cassette type air conditioners supply , installation, testing and commissioning of air cooled hi wall split type air conditioners supply, installation, testing and commissioning including vaccumiazation and nitrogen testing of following nominal sizes of soft/hard drawn copper refrigerant piping for vrv/vrf system supply, installation, testing and commissioning including vaccumiazation and nitrogen testing of following nominal sizes of soft/hard drawn copper refrigerant piping for vrv/vrf system, complete with fittings, with suitable adjustable ring type hanger supports, supplying and installing following size of perforated hot dipped galvanised iron cable tray (galvanisation thickness not less than 50 microns) with perforation not more than 17.5%, in convenient sections, joined with connectors, suspended from the ceiling with g.i. suspenders including g.i. bolts & nuts, etc. as required. 300 mm width x 50 mm depth x 1.6 mm thickness providing and fixing poly propylene- random - co - polymer (ppr) pipes pn-16 (sdr 7.4) - 25 mm outer dia 25 mm nominal dia pipes with required bend, tees etc. total quantity : 422