BSNL DOT Central Delhi SITC of AHU & Ducting Procurement 2025 - IS 550/Copper Cabling & XLPE Specifications

1. Supply, Installation, Testing and commissioning of factory built floor mounted chilled water double skin type horizontal vertical air handling units made of 25mm thick panels consisting of pre plasticized G.I. casing of thickness 0.8mm outside layer and 0.8 mm inside layer with polyurethane foam PUF insulation factory injected between them by injection moulding machine, complete with blower section with blower suitable for 65mm static pressure as required, minimum 2 bend GSS PVC eliminators, cooling coil section with aluminium finned copper tubes tubes thickness not less than 0.5mm cooling coil of 6 row deep, filter section with 50mm thick metal viscous washable synthetic type air prefilters, belt drive package with TEFC drive motor of efficiency class IE3 suitable for 415 plus minus 10 percent volts, 50Hz, 3 Phase AC supply suitably designed for variable frequency drive applications, drain connections, stainless steel 18G drain pan with PUF insulation, 150 mm dia. dial type pressure gauges 2 nos. and industrial type thermometers 2 nos. at the inlet and outlet of coil, auto purge valve wherever required, necessary vibration isolation arrangement etc. complete as per specification and of following capacities. Ms Zeco, Systemair, Flaktwood, Edgetech, Patel Airtemp, waves, Nutech, Carryaire, Saiver India Make 1.1 18600 CFM at thre rate of 65 mm wg static pressure

2.2 150mm dia. 32 mm thick insulation

2.4 80 mm dia. 32 mm thick insulation

3. Supplying, fixing, testing and commissioning of following valves, strainers, gauges in the chilled water plumbing duly insulated to the same specifications as the connected piping and adequately supported as per specifications. 3.1 BUTTERFLY VALVE MANUAL with C I body SS Disc, Nitrile Rubber Seal and O Ring PN 16 pressure rating for chilled water hot water circulation as specified. 3.1.1 200mm dia

3.1.3 80 mm dia.

3.2 BALANCING VALVE WITH BUILT IN MEASURING FACILITY with C I body flanged construction with EPDM coated disc with long pitch with protected out pipe insulation and PN 16 pressure rating for chilled hot water circulation as specified. 3.2.1 65 mm dia.

4. Providing and fixing in position the industrial type pressure gauge with gun metal brass valves etc. complete as required.

6. Providing and fixing in position Air Vent for Automatic purging etc. complete as required.

7.2 Thickness 0.80 mm sheet

7.4 Thickness 1.25 mm sheet

9. Providing and fixing 40 mm dia. Nominal bore G.I pipe complete with G.I. fittings and clamps for drain piping with 9 mm thick O class closed cell nitrile rubber insulation etc. Complete required as per specification.

11. Supplying and making end termination with brass compression gland and copper lugs for 4C x 4 Sqmm size of PVC insulated and PVC sheathed XLPE copper conductor cable of 1.1 KV grade as complete as required.

13. Providing and fixing 6 SWG dia. G.I. wire on surface or in recess for loop earthing along with existing surface recessed conduit sub main wiring cable as required.

15. Dismantalling of existing piping valves of different floor AHUs and shifting the piping to the store in basement or at any other suitable place in building as directed by Engineer in Charge etc. as required. 15.1 200 mm dia.

15.3 100 mm dia.

15.5 65 mm dia.

17. Supplying, fabricating and fixing of MS frame made out of following members ic cutting, welding, grouting and painting the MS members etc. complete as reqd. 17.1 40mmx40mmx5 mm MS angle iron.