REPAIR/MAINT OF AC DUCTS, DAMPERS AND CONNECTED SERVICES IN CENTRAL AC PLANT UNDER GE GUWAHATI

Dismantling of PGI Air duct made out of any gauge PGI sheet including necessary support, jointing with suitable size MS Angle/flat iron and 3mm thick rubber packing, drilling and necessary GI nuts, bolts & washers all as specified and directed, from ground level to upto 50ft height.

Supply, fabricate and erect PGI Air duct made out of 22 gauge PGI sheet including necessary support, jointing with suitable size MS Angle/flat iron and 3mm thick rubber packing, drilling and necessary GI nuts, bolts & washers all as specified and directed, from ground level to upto 50ft height.

Supply, fabricate and erect PGI Air duct made out of 24 gauge(Duct) PGI sheet including necessary support, jointing with suitable size MS Angle/flat iron and 3mm thick rubber packing, drilling and necessary GI nuts, bolts & washers all as specified and directed, from ground level to upto 50ft height.

Supply, fabricated and erect PGI Air duct made out of 20 gauge(For AHU ) PGI sheet including necessary support, jointing with suitable size MS Angle/flat iron and 3mm thick rubber packing, drilling and necessary GI nuts, bolts & washers all as specified and directed, from ground level to upto 50ft height.

Material & Labour for insulation to supply air duct with 25 mm thick rockwool/mineral wool slab covered with chicken wiremesh tissue paper and 24/26gauge aluminium sheet cladding work including taking down old unsv insulation complete all as specified and directed.

Material & Labour for insulation to supply air duct for OT AHUS with 20 mm thick armafex insulation covered with armaflex insulation using SR 505 fevicol solution complete all as specified and directed.

Material & Labour for insulation to 3x75 TR chillar unit with 25 mm thick armafex insulation covered with armaflex insulation using SR 505 fevicol solution complete all as specified and directed.

Supply & Fixing aluminium powder coated supply air diffuser minimum 22 gauge with volume control damper including taking down old unsv diffuser complete all as specified and directed.

Supply & Fixing aluminium powder coated return air linear diffuser minium 22 gauge complete all as specified and directed.

Supply only double skin polymer fabric HDPE fresh air filter (Filter class-G3 as per EN 779) washable/cleanable type having efficiency 95% to 99% down to particle size of 20 micron, fabricated out of CRCA sheet metal duly painted with two coats of grey hammer tone spray paint over two coats of red oxide primer with lifting handle, Box/flanged type, aluminium spacer etc, all as specified and directed of following sizes :-

Supply only double skin polymer fabric HDPE fresh air filter(GL-type) washable/ cleanable type having efficiency 95% to 99% down to particle size of 5 micron, fabricated out of CRCA sheet metal duly paint with two coats of grey hammer tone spray paint over two coats of red oxide primer, with lifting handle, Box/flanged type, aluminium spacer etc, including taking down all as specified and directed of following sizes :-

Supply only "HEPA" filter (EN-1882) with fibre glass paper filtering media capacity 1000 CFM efficiency 99.97% down to particle size of 0.3 to 0.5 micron aluminium frames box type of size 610x450x300mm including taking down all as specified and directed.

Supply & Fixing in replacement butter fly valve of dia 100mm suitable for condensing /chiller water line with ISI marked including jointing with proper gasket, nuts, bolts & washer all as specified and directed.

Supply & Fixing in replacement butter fly valve of dia 150 mm suitable for condensing / chiller water line with ISI marked including jointing with proper gasket, nuts, bolts & washer all as specified and directed.

Supply & Fixing in replacement NRV of dia 150 mm suitable for condensing /chiller water line with ISI marked including jointing with proper gasket, nuts, bolts & washer all as specified and directed.

S & F of water pressure gauge 4" dial type with cock 0-14 Kg/Sqmtr complete all as specified and directed.

S & F of refrigerant pressure gauge 4" dial type with cock 30 to 150 PSI complete all as specified and directed.

S & F of refrigerant Temp. gauge 4" dial type cock 00C to 500C complete all as specified and directed.

S & F of ball bearing suitable for cooling tower motor, chillar motor, Blower motor, condenser motor etc removing of existing unserviceable bearing of following type all as specified and directed.

Supply and fixing of MCB of following capacities:-

63A, TP, 415V, 50 Hz

40A, TP, 415V, 50 Hz

Supply and fixing of power contactor of following capacities suitable for existing panel and as per sample complete all as specified and directed.

100A, 3 Pole, AC, 220 Volts

40A,3 Pole, AC, 220 Volts

32A, 3 Pole, AC, 220 Volts

25A, 3 Pole, AC, 220 Volts

Supply and fixing of over load relay of following capacities suitable for existing panel and as per sample complete all as specified and directed.

Supply and fixing of blower of capacities BDB 400 CM, Code No.CBC 12121-00-00 suitable for existing AHU and as per sample complete as speicified and directed.

Supply and fixing of Compressor oil, type 5 GS (White), duly filled for top up to central AC plant of capacity 75 TR, complete all as per manufacturer's recommendation and as directed.

Supply & Fixing in repair, Humidity thermostat of existing make for AHU unit of Central AC plants (AC Plant Make - Blue star) of capacity 75 TR complete all as specified and directed.

Supply & Fixing in repair, Humidity Controller of existing make for AHU unit of Central AC plants (AC Plant Make - Blue star) of capacity 75 TR complete all as specified and directed.

Servicing and de-scaling of FRP cooling tower induced draft counter flow of dimension 2855x3100x3850mm of Central AC plants (AC Plant Make - Blue star) of capacity 75 TR complete with chemical solution as recommended by manufacturer with rods and wire brushes complete all as specified and directed.

Supply and fixing of starting capacitor suitable for single phase, 40MFD, 220 volts, 50 Hz mortuary cooling chamber as per existing make & model complete all as specified and directed.

Supply and fixing of Starting relay suitable for single phase, 220 volts, 50 Hz mortuary cooling chamber as per existing make & model complete all as specified and directed.

Supply and fixing of over load protector suitable for single phase, 220 volts, 50 Hz mortuary cooling chamber all per existing make & model complete all as specified and directed.

Supply and fixing of Blower fan motor of mortuary cooling chamber, single phase, AC 220 Volts, 50 Hz all per existing make & model complete all as specified and directed.

Material & Labour for leakage testing with nitrogen gas pressure 24 to 48 hours, checking of copper pipe lines, cooling coil, suction/discharge gas pipe lines and repair of the same with gas welding, replacement of defective nuts/washers with new ones for mortuary cooling chamber as required at site complete as specified and directed .

Servicing, greasing and varnishing of blower fan motor of mortuary cooling chamber, AC 220 Volts, 50 Hz., complete all as specified and directed.

Dismantling of sealed compressor unit (Make: Kirloskar) carefully after removing refrigerant pipe connection, electric wire connection etc from outdoor unit of Walk in cooler and Supply & Fixing sealed unit compressor , capacity 3 TR, 3 phase, 415 Volts, including vaccum and charging of refrigerent gas, leakage test and testing of the same complete all as specified and directed .

Material & Labour for leakage test with nitrogen gas pressure 24 to 48 hours, checking of copper pipe lines, cooling coil, suction/discharge gas pipe lines for leakage of walk- in- cooler and repair of the same with gas welding, replacement of defective nuts/washers with new ones complete all as specified and directed.

Supply & Fixing high speed blower fan motor of walk -in -cooler (Make of walk -in -cooler - Kirloskar) for outdoor unit, AC 415 Volts, 50 Hz as per existing model and RPM, fixing in position including electrical connections complete all as specified and directed.

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