SITC of air-conditioning system Low Side comprising Double Skin Air Handling Units (AHUs) and associated valves, duct insulation etc for B block ground floor 1st floor AB81 Lab area at TIFR, Colaba, Mumbai

SITC of Caryair/Systemair/Air-o-Mec Engineers make Double Skin Standard type Horizontal floor mounting Air Handling Unit constructed from 22G plain GI sheet as inner skin & outer skin shall be 22 G GI Powder coated sheet with 40 mm thick injected PFU with 45 kg/cubm. density insulation in-between and the frame work shall be constructed of extruded Aluminum hollow section with thermal break and filled with reformed insulation section. Unit shall complete with a) Fan section with forward curved fan made of ‘KRUGER’, suitable capacity energy efficient Motor, taper lock pulley & flat belt b) Coil section with CU coil of 5/8" size 22 G thickness & AL Fins of 32G Thickness c) Filter section with flat type air filters with 3 ply pleaded HDPE washable filters with AL casing of 50mm thick d) Suitable depth PVC moisture eliminator kept in between coil and motor to arrest condensate spray. Motor shall have terminal box at the top for the ease of electrical connections. All AHU nut, bolt and washer should make of anti-corrosive material. The AHU shall be suitable for the following duty as per tender’s technical specifications enclosed

Capacity :- 31450CMH (18500CFM), 50mm static, 37 sqft area, 6 rows deep cooling coil for ‘B’ Block Ground & 1st floor area

Capacity :- 11050CMH (6500CFM), 50mm static, 13 sqft area, 4 rows deep cooling coil for Basement Lab (AB81) area

Modification of chilled water piping connections to cooling coil of AHU of AB81 Basement Lab with SITC of 50mm size , Tata/Jindal make M.S. `C` class , e.r.w., and reusing the existing ‘Siemens’ make 3-way valve & shall be complete with 50mm thick, High density (24 Kg/CubM), TF quality thermocole insulation wrapped with Polythene vapor barrier, chicken wire mesh, and finished with two layer of 12mm thick each sand & cement plaster, painted with two coats of grass green enamel paint . All the nuts, bolts & washer, used for piping & valve connection, etc. shall be made of SS material having 304 Grade. . All the piping support should be hot dipped galvanized

Modification of chilled water piping connections to cooling coil of AHU of ‘B’ Block Ground & 1st floor area with SITC of 80mm/100mm size , Tata/Jindal make M.S. `C` class , e.r.w., and reusing the existing ‘Siemens’ make 3-way valve & shall be complete with 50mm thick, high density (24 Kg/CubM), TF quality thermocole insulation wrapped with Polythene vapour barrier, chicken wire mesh, and finished with two layer of 12mm thick each sand & cement plaster, painted with two coats of grass green enamel paint . All the nuts, bolts & washer, used for piping & valve connection and piping & AHU connection shall be made of SS material having 304 Grade. All the piping support should be hot dipped galvanized.

Design, fabrication, supply, installation, testing and commissioning of GSS ducting as per IS655 of following size with all the accessories like turning vanes, elbows, flange, Hot dipped Galvanized Structural steel supports, gaskets, SS 304 Grade nuts and bolts & hardware etc. , complete in all respects to the entire satisfaction of the department as per technical specifications in totality. Nothing extra shall be payable on any account.

Size 20G

Size 22G

Size 24G

S&I of Heavy duty Damper made out of 16G GI sheet with all the moving parts supported on Brass bush made of GI sheet (Flappers) & hot dipped galvanized structural steel (levers) on the outlets of the AHUs

Supply & installation of thermal insulation for supply air ducting air ducting with 13mm thick Nitrile based rubber having Class ‘O’ rating , backed with factory laminated Aluminum foil including sealant between duct and insulation & Aluminum tape between joints, complete in all respects to the entire satisfaction of the department as per technical specifications in totality. Nothing extra shall be payable on any account.

Supply & Installation of Acoustic Insulation of ducting with 10mm thick Armasound Nitrile Rubber Insulation on supply air ducting with all the accessories and as per attached technical specifications

Supply & Installation of Aluminum powder coated supply air linear grilles/Flanged Grills of approved make and as per attached technical specifications

SITC of Fire Retard Canvass connection between ducting & AHU mouth

S&I of H Guru/Fiebig make 4” dial type pressure gauge of range 0-7 kg/sq.cm with all the accessories

S&I of H Guru/Fiebig make 4” dial type Temperature gauge of suitable range for chilled water application with all the accessories

Supply, fixing, testing & commissioning ‘Leader’ make 15mm Air Release Valve including S.S ball valve, barrel nipple etc to connect to the GI chilled water pipe line complete as required.

Supply, fixing, testing & commissioning ‘Leader’ make 15mm drain Valve including S.S ball valve, barrel nipple etc to connect to the GI chilled water pipe line complete as required.

Supply, Fixing, testing & commissioning of ‘Audco’ make, 50mm Nominal size, PN16 rating Butterfly Valve with all the accessories

PART B - Buy Back Items

Buy Back of existing Double Skin AHU of AB81 Lab area with associated Piping and GI Ducting , etc on “As is where is basis”, including dismantling & shifting work

Buy Back of existing Double Skin AHU of ‘B’ Block Ground and first floor area with associated Piping and GI Ducting , etc on “As is where is basis”, including dismantling & shifting work

Iceberg HVAC Pvt Ltd

Air-O-Mec Engineers