REPAIR MAINT OF PACKAGE TYPE ACs CENTRAL TYPE AC PLANT AND OTHER CONNECTED ITEMS AT 8 FBSU AF STN AWANTIPUR

Amount

Supply and install in replacement an existing M2VPD single and twin motor protection device with a new model featuring an LED screen panel for voltage and current display. This device must provide comprehensive protection, including overvoltage, undervoltage, single-phase protection (SPP), phase reversal (PH-r), and unbalanced voltage/current. The device should come with inbuilt calibration facilities and integrated 3-phase current transformers (CTs) for maximum reliability in monitoring two motors (a total of 6 CTs) complete all as specified and as directed by the Engineer-in-Charge. Make: Softhard or equivalent.

Material and labour for cleaning/servicing of cooling tower by using of chemical, natural draught type/FRP type of the following capacities central AC plant including removing of existing choked fins of 50 TR cooling tower cap and S&F of new fins of cooling tower for AC plant including replacement of Wire mess protector jali , cleaning of water tank, cleaning of nozzels (brass/PVC), including replacement unsv nozzels all as specified and directed.

Ditto as srl no 3.00 but for 20 TR capacity cooling tower.

Material and labour for descale a water-cooled shell-and-tube condenser by disconnecting the inlet and outlet water connections, installing dummy plugs, and circulating a descaling agent (R-111 or equivalent) until all scale is removed from the copper tubes. Open both end covers, brush the tubes with a nylon brush, then flush them with water. After cleaning, reassemble the condenser, replace damaged rubber gaskets, and reconnect the water inlet and outlet connections. Test for leaks to ensure proper sealing complete all as directed by engr-in-charge Note: de-scaling operation to be done by OEM only. (a) Condenser unit of capacity 26 TR of WSA

(b) Ditto as serial No 5.0 but of capacity 10 TR

Taking down of U/S Commercial scroll sealed compressor Model NP SZ185S4RC from the location by OEM only. Remove pressure from both the high and low side before cutting out the compressor copper pipes by tubing cutter complete all as specified and directed.

Material and labour for installation , commissioning, testing in replacment of new commercial scroll sealed compressor Model No SZ185S4RC of capacity 13 TR for central type water chiller plant, max operating 35 Ampere LR 175A, suction pressure varying from 25 bar to 31.9 bar TS max varries from 54 degree C to 65 degree C from LP side to HP side & TS min varries from -35 degree C to -35 degree C from LP side to HP side refrigeration water chiller type, refrigerant R 407C, lubricant oil type mineral oil, P.O.E. 160 SZ. complete all including necessary brazing and as specified and as specified and as directed by Engr-in-Charge. Note: Supply & installation to be performed by OEM of existing make only. Make-Danfoss as approved by GE whose design shall be final for make.

Material and labour for filter dryer strainer suitable for central AC plant of various capacities for installation in suction/chiller/liquid line. Make- Danfoss

Disconnect and dismantle a three-phase 440 VAC motor, including both electrical and mechanical connections. Transport the motor to a workshop, remove the rotor, and extract the burnt stator winding. Rewind the stator with synthetically enamelled copper wire, apply F-class insulation, varnish, and bake. Clean the rotor and bearings, reassemble the motor, and replace specified parts: 2 SKF ball bearings, 1 cooling fan, and 1 bush. Reinstall the motor at its original location, ensure proper alignment, reconnect all connections, and test thoroughly. Complete as specified and directed by the Engineer-in-Charge. (a) 20 HP

Material and labour to open the chiller unit of chiller plant of capacity 26TR/10TR.This involves dismantling the chiller by unscrewing the bolts and removing the liquid lines , then scraping off the insulation from chiller, trace the source of any leaks. Repair the leaks , replace the leaked/unsv gaskets and unsv bolts and test the chiller to ensure the issue is resolved. Reassemble the chiller, reinstall the liquid line, add new insulation, and test the unit to confirm proper operation. Complete all work as specified and as directed by the Engineer-in-Charge.

Supply and fix an industrial temperature control switch for a chiller plant of existing capacity, matching the existing make and model. Disconnect the old unserviceable switch and replace it with the new one. Test the installation to ensure it functions properly and meets the satisfaction of the Engineer-in-Charge.

Material and labour for cleaning/servicing of hot water generator of 3X26 TR capacity AC plant by pressure air method with using air blower and opening the hot water generator carefully , taking out & replacement of old unserviceable heating element, and applying one coat of synthetic enamelled paint ,all as specified and directed. Note:- heating element changed measured and paid separately under respective item of section A as supply only.

Supply and fixing in replacement for digital AC voltmeter panel mounting type , 3 digit display , input voltage range 50-480 volts all as specified and directed.

Supply and fixing in replacement for digital AC Ammeter panel mounting type, 3 digit display of range 0-200µA all as specified and directed.

Supply and fixing in replacement for compact LED indication lamp of colour Red/Yellow/Blue all as specified (NOTE: 3 Nos of lamps of all three colours considered as one Unit and priced as one unit only)

Material and labour for cleaning of Y type strainer of size 65/80/100 mm by opening of all nut bolts and removing filter under strainer cleaning the accumulated mud, cooling tower of any capacity, choked nozzles, valves etc. Complete all as specified and directed by Engr-in-Charge.

Material and labour for U shape type high pressure guage dial size 4"dia bottom mount dual scale of rating 0-150 kg/cm² suitable for working on R - 407C gas with flare nut complete all as specified and directed.

Material and labour for installation of temprature guage vertical mounted type with nuts of suitable size in various lines , of rating -20 to 50 °C with accuracy of +/- 1 degree celcius all as specified and directed.

Material and labour for oil differential pressure cut off switch, MP - 55, suitable for working on R - 407C gas with flare nut. Make: denfoss

Material and labour for expansion valve TCBE working on R22/R407C of suitable flare size including brazing , welding work suitable for package AC unit. Make: Denfoss

Material and labour for replacement of copper tubing of required size and shape confirming to relevant IS of following sizes.

Supply and fixing for MCCB , 415 V, fixed type , ics = 100% of icu ,16 KA, 3 Pole 100 Amps. Make: Legrand/L&T/Havells/ABB

Supply and fixing for MCCB , 415 V, fixed type , ics = 100% of icu ,16 KA, 3 Pole 160 Amps. Make: Legrand/L&T/Havells/ABB

Supply and fixing for MCCB , 415 V, Adjustable type , ics = 100% of icu ,36 KA, 3 Pole 250 Amps. Make: Legrand/L&T/Havells/ABB

Supply and fixing for 415V, 10KA 'C' curve MCB Triple pole (TP) of capacity 25 to 63 Amp in the MCB DB complete with connection testing and commissioning all as specified and directed. Make: Legrand/L&T/Havells/ABB

Supply and fixing for 240V, 10KA 'C' curve MCB single pole & neutral of capacity 40 to 63 Amp in the MCB DB complete with connection testing and commissioning all as specified and directed. Make: Legrand/L&T/Havells/ABB

Supply and fixing in replacement 240V, 10KA 'C' curve MCB single pole of capacity 6 to 32 Amp in the MCB DB complete with connection testing and commissioning all as specified and directed. Make: Legrand/L&T/Havells/ABB

Supply and fixing for three pole power contactor of capacity AC3 9 Amps , AC1 25A with coil voltage 415 volt AC. Make : Havells HGS 9/Siemens/L&T

Supply and fixing for three pole power contactor of capacity AC3 18 Amps , AC1 40A with coil voltage 415 volt AC. Make : Havells HGS 18/Siemens/L&T

Supply and fixing for three pole power contactor of capacity AC3 25 Amps , AC1 45A with coil voltage 415 volt AC. Make : Havells HGS 25/Siemens/L&T

Supply and fixing for three pole power contactor of capacity AC3 40 Amps , AC1 60A with coil voltage 415 volt AC. Make : Havells HGS 40/Siemens/L&T

Supply and fixing for three pole power contactor of capacity AC3 65 Amps , AC1 85A with coil voltage 415 volt AC. Make : Havells HGS 65/Siemens/L&T

Supply and fixing for thermal overload relay range 12-18 amps for power contactor all as specified and directed. (Make:-ABB / L&T)

Material and labour for senser cable , 4 core copper conductor cable , 5 amps , 50 Hz, of size 7/36 guage all as specified & directed.

Supply & top up of regrigerant gas R - 407C in chiller plant/Package ac plant compressor including transport of the gas in cylinder complete all as specified and as directed.

Supply & fixing of heating element of capacity 6/7 KW 2 feet of suitable size push type suitable for 63 KW hot water Generator complete all as specified and directed.

Material and labour for cleaning and dusting of air filter of AHU unit of capacity 50 TR situated at WSA complete All as directed by Engr-in-charge.

Material and labour for taking down the corrorded and unserviceable butterfly valves of size 40/50/80 mm and its counter flanges, nut and bolts from the exisiting position and S & F butterfly valve with counter flanges, nut and bolts etc including welding and testing the leaks.

Supply, laying or passing in replacement through pipe/cable duct/clamp on wall XLPE insulated, armoured heavy duty electric cable with aluminium conductor, 1100 volts grade, cross-sectional area 35 sq mm 3.5 core with thimbles on both sides complete all as specified and directed.

Supply and fixing in repair for strip heaters 240 volts with thermostat, 3 KW, cat part no DTA (TH) Heaters 1025 Make Daspass or equivalent, complete all as specified and as directed.

Supply & fixing in repair of ball brass valves, high pressure, with polyethilyne float and flynut complete, screwed for iron pipe or brass ferrule and fixed complete all as specified and as directed.

Supply & fixing in repair of Gun metal globe or gate valves (ISI-marked) with iron wheel head, screwed both ends for iron pipe 20mm bore and fixed, all as specified and directed.

Mild steel galvanised iron water tubing, 20 mm bore, with screwed & socket joints, medium grade, with all fittings, such as sockets, bends, elbows, unions, tees, diminishing pieces etc. fixed to wall upto 12 metre height and ceiling or laid in trenches/under floors, inclding taking down old unserviceable pipe complete all as specified and directed.

Material and labour for Lagging of exposed pipe by providing all around of pipe thick bounded mineral wool of 50 mm thickness performed SNAPON pipe section of density 144 Kg/M3 conforming to IS-9842, covered completely by chicken mesh net 25 guage 20mm mesh and reinforced with 1mm galvanised wire applied spirally @15cm centre to centre and providing 5mm thick smooth evenly. Plaster layers of composition consisting of 85% magnesia asbestos and plaster of paris mortar 1:6 of required strength to suit exposed weather condition under sub zero temperature for 20 mm dia pipe.

Earthing in replacement complete with galvanised steel earth plate electrode 60 x 60 cm x 6.3 mm thick, buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less than 1.5 metres below normal ground level, connected to galvanised iron strip 25 x 4 mm as earth strip by means of bolts, nuts, check nuts and washers of galvanised iron or steel all as shown in Electrical plate No. 3, SSR Part I- 2009 with 40 mm dia medium grade GI pipe as a protection to earth strip and 15 mm dia medium grade GI pipe for watering purpose including excavation and earth work in any type of soil, funnel, wire mesh, PCC pit, RCC cover, CI frame etc complete and connected to earthing test point all as specified or indicated including testing on completion.

Supply & fixing for galvanized iron strip 25x4 mm with saddles/insulators, complete with fixing screws for roof/down conductors/main earthing lead, including bracing/welding and nut bolts jointing at all joints complete all as specified and directed.

ORISON ENTERPRISES (BID ID -3074012)