COMPREHENSIVE MAINT AND REPAIR WORK OF CERTRAL AC PLANTS, PACKAGE TYPE AC PLANT, SPLIT AC WINDOW AC AND ALLIED WORKS INCLUDING CONNECTED MISC ITEMS AT IRDE UNDER GE (I) RND DEHRADUN

Amount

Material and labour for Descaling of condenser unit by rubbing with nylon brush/ cleaning rod using hydrochloric acid pumped through electric driver descaling pump including dismantling and connecting all dismantled components in proper position after servicing/ overhauling/ greasing etc replacement of packing gasket 3mm thick, nuts, bolts with washer, testing of water line for leakage & repairing of pipe line to make it leak proof complete, all as specified and directed for the following AC plants :- Notes : (i) The de-scaling & cleaning of condenser (Heat Exchanger) of cooling tower shall be done by circulating concentrated de-scaling solution mixed with water of make as approved to the entire satisfaction of GE/Engineer-in-Charge complete all as specified in Sch ‘A’. (ii)The hydrochloric acid shall be used as a de-scaling solution mixed with water in a suitable proportion as approved by the GE/Engineer-in-Charge so as avoid damage to existing pipe lines.

11 TR capacity AC Plant Package Type (installed at Mechanical Lab Technical Area. IRDE)

27.5 /27 TR capacity AC Plant (installed at Micro /C V RAMAN Building IRDE)

30 TR capacity AC plant (installed at Chetak Buildling ).

45 TR capacity AC Plant (installed at Large Optics Building IRDE)

65 TR capacity AC Plant (installed at MMG / Optics Building IRDE)

80 TR capacity AC plant (installed at Photonic Buildling & EOL/ TIS Building IRDE).

Dismantling the head from compressor fitted in system, and strip opening of compressor head of twin cylinder for Model AC 27.5 TR of Kirloskar make SMC 8-65 model of ACCEL compressor completely for servicing /overhauling mechanically and electrically, and checking of various components with precision instruments to assess the requirements of repair/replacement, and making inventories for repairs required and re-fixing the serviceable parts in position after proper cleaning, oiling/greasing,etc ,and removing & replacement of defective / unserviceable parts with new parts, as required at site, and reassembling the compressors head ensuring perfectly leak proof after cleaning the oil sump, oil pump connecting rod, piston, liner etc and filling of compressor oil, before charging of refrigerant gas to required pressure and testing at site on full load to the entire satisfaction complete all as specified and directed for following :- ( included notes mentioned in here in after) Notes: - (i) The replacement of defective / nonfunctional parts, and Refrigerant gas and compressor oil for top up shall be measured & paid for separately as “Supply only” under appropriate item of Sch ‘A’ and fixing/filling rate for new items are deemed to include under these items. (ii) The refregrent gas to be pumped down before dismantlling the compressure head for avoid the wastage of gas. (iii) The quoted rate shall be deemed to include replacement of small/ minor parts for prroper functioning of compressure .

M&L for cutting and grinding the crank-shaft (for 27.5 TR of Kirloskar make/SMC 8-65 model of ACCEL compressor) of 0.50/0.75 mm around as required to make it equivalent to manufacturer’s standard size and smoothening/ fine finishing,polishing of shaft to match with half section big end bearings, cleaning oil ports for proper lubrication complete all as specified and directed by Engr-in-Charge. Note : (i) The cost of taking out and re-fixing of the shaft / rod in position after necessary repairs is deemed to be included under the rates quoted by the contractor for respective Schedule `A' item. (ii) The rates for above items are deemed to include transportation to & fro of crank-shaft to workshop for necessary repairs.

Supply only following items / spare parts suitable for Kirloskar make compressors of semi sealed 27.5 TR / 8-65 Accel Make dismantled / fixed under Sch ‘A’ item No.2 here in above complete all as specified and directed

Cylinder liner

Piston Bare

Compression ring set

Piston pin/ gudgen pin

Circlip internal

Connecting rod -05mm

Suction valve 'o' ring

Suction & Discharge valve spring

Discharge valve assembly (R-22)

Crank shaft AC COMPRESSOR 27.5 TR of Make KIRLOSKER/8-65 Accel

Safety plate

Shaft seal assembly

Rewinding of semi sealed compressure 27.5 TR

Filter wire gauge

Suction filter with nut

Oil pump with ring set for compressure 27.5 TR

Set of gasket for compressure 27.5 TR

Main bearing .05 mm.

Oil filter

loading coil

pressure gauge - 30 to 300 PSI

Carrying out leak detection in the system of AC plants including nitrogen pressure testing for 24 hours and repairing the leakage by gas welding / electric welding of refrigerant pipes, replacement of valve gland, gaskets etc. and then creating vacuum for 4 hours before charging refrigerant gas R-22 in the system and testing the complete plant for working pressure for 24 hours complete, all as specified and directed. Note : R-22 gas shall be measured and paid separately under Schedule ‘A’ Item.

11 TR capacity AC Plant Package Type(installed at Mechanical Lab Technical Area. IRDE)

27.5 /27 TR capacity AC Plant (installed at Micro /C V RAMAN Building IRDE)

30 TR capacity AC plant (installed at Chetak Buildling ).

45 TR capacity AC Plant (installed at Large Optics Building IRDE)

65 TR capacity AC Plant (installed at MMG / Optics Building IRDE)

80 TR capacity AC plant (installed at Photonic Buildling & EOL/ TIS Building IRDE).

Supply, fixing, connecting and testing in replacement of UNSV strip heater fins type, 3.0 KW, 230 volts, single phase, AC supply in any position complete, all as specified and directed.

Supply of refrigerant gas monochloro difluoro methane (CHCLF2) R- 22 conforming to IS-5160 of 1983 , duly filled in factory sealed cylinder standard capacity for filling under Sch ‘A’ item No 5. and here in above complete, all as specified and directed.

Supply only R-134A/410 refrigrant gas with testingn under Sch ‘A’ item 2 here in above complete, all as specified and directed.

Heater Element size and capacity as per existing Watre heater Generator 100/54 KW complete, all as specified and directed.

Supply of lubricating oil anti freezing for refrigeration in factory sealed container of standard capacity for filling under Sch ‘A’ items No 3 complete,all as specified and directed. Make: Servo froze -68-10c of IOC.

Supply fixing and testing in replacement of UNSV pre filter with GI sheet frame of size 610mm x 610mm x 50mm deep suitable for Air handling units of air conditioning plants including efficiency 90% , down to 10-20microns, Initial Pressure drop- 2.5 mm WG, filter media shall be Synthetic Non Woven with Both Side HDPE Mesh, and testing complete complete, all as specified and directed.

Supply fixing and testing in replacement of UNSV condencer safety valve of size 3/4"& ½”, for pressure 300 PSI with and Including 3/4"& ½”, mild steel socket duly welded on condenser ensuring perfectly leak proof joint with pressure testing complete all as specified and directed.

Supply fixing and testing in replacement of UNSV thermostatic expansion valve (R-22) suitable for 80 TR capacity of central AC plant complete, all as specified and directed.

Supply fixing and testing in replacement of UNSV water pressure gauge 100 mm dia of range 0 to 100 PSI suitable for central AC plant complete all as specified & directed.

Supply fixing and testing in replacement of UNSV Gas pressure gauge 100 mm dia of range 0 to 300 PSI suitable for central AC plant complete all as specified & directed.

Supply fixing and testing in replacement of UNSV Water flow switch for condenser and chiller suitable as per existing AC Plant Make :Carrier (Screw Chiller Unit) complete, all as specified and directed

Supply fixing and testing in replacement of UNSV sensor for low pressure/High Pressure/Oil Pressure switch suitable for as per existing suitable for AC Plant Make :Carrier (Screw Chiller Unit) complete, all as specified and directed

Supply fixing and testing in replacement of UNSV Loading/ unloading coil suitable for as per existing AC Plant. Make :Carrier (Screw Chiller Unit) complete, all as specified and directed

Supply fixing and testing in replacement of UNSV PVC Fills of FPR cooling tower size 600mmx300mmx 150 mm complete, all as specified and directed

Disconnecting and removing old existing non functional electric motor, of any description and in any position from existing platform for compressor/blowers/pumps/ cooling towers and dismantling and strip opening of the motor, for cleaning oiling/greasing and fixing of serviceable parts in position and removing the old existing burnt windings, cleaning the slots & rewinding of the electric motor with existing gauge super enameled copper wire, including insulating material such as illuminous paper, Letherized paper, cotton tape, glass sleeves insulating varnish etc for powering compressor /blowers /pumps / cooling towers and transportation to site & refixing on existing platform ,connecting with exising connections & testing on full load complete all as specified and directed for following capacity :- .

5.0 HP capacity, Three phase 50 Hz AC supply

7.5 HP capacity, Three phase 50 Hz AC supply

10 HP capacity, Three phase 50 Hz AC supply

15 HP capacity, Three phase 50 Hz AC supply

Disconnecting and removing old existing non functional electric motor, of any description and in any position from existing platform for pumps and dismantling and strip opening of the motor, for cleaning oiling/greasing, Replaceing UNSV suitable size of bearing and fixing of bearing, imppler serviceable parts in position pumps and transportation to site & refixing on existing platform ,connecting with exising connections & testing on full load complete all as specified and directed for following capacity :-

5.0 HP capacity, Three phase 50 Hz AC supply

7.5 HP capacity, Three phase 50 Hz AC supply

10 HP capacity, Three phase 50 Hz AC supply

15 HP capacity, Three phase 50 Hz AC supply

Supply fixing,connecting and testing in replacement of UNSV 3 pole Power contactor with 2NO + 2NC auxiliary contacts, coil voltage 220 volts, AC3 rating 16 Amps complete all as specified and directed. Make L&T or equievelent model of specified and directed.

Supply fixing and testing in replacement of UNSV 3 pole Power contactor with 2NO + 2NC auxiliary contacts, coil voltage 220 volts, AC3 rating 25 Amps complete all as specified and directed . Make L&T or equievelent model of specified and directed.

Supply fixing and testing in replacement of UNSV 3 pole Power contactor with 2NO + 2NC auxiliary contacts, coil voltage 220 volts, AC3 rating 32 Amps. Complete all as specified and directed . Cat part No SS90935- Type ML-10 of make L&T or equievelent model of specified and directed. ,

Supply fixing and testing in replacement of UNSV 3 pole Power contactor with 2NO + 2NC auxiliary contacts, coil voltage 220 volts, AC3 rating 50 Amps. Complete all as specified and directed . Make L&T or equievelent model of specified and directed.

Supply fixing and testing in replacement of UNSV 3 pole Power contactor with 2NO + 2NC auxiliary contacts, coil voltage 220 volts, AC3 rating 70 Amps. Complete all as specified and directed .Make L&T or equievelent model of specified & directed

Supply fixing and testing in replacement of UNSV bimetal overload relays directly operated & directly mounted on ML type Power contactor for relay range of 06 to 18 Amps complete all as specified and directed. Make L&T or equievelent model of specified and directed. .

Supply fixing and testing in replacement of UNSV bimetal overload relays directly operated & directly mounted on ML type Power contactor for relay range of 19 to 30 Amps complete all as specified and directed. Make L&T or equievelent model of specified and directed.

Supply fixing and testing in replacement of UNSV bimetal overload relays directly operated & directly mounted on ML type Power contactor for relay range of 32 to 45 Amps complete all as specified and directed. Make L&T or equievelent model of specified and directed.

Supply fixing and testing in replacement of UNSV digital type of size 96mm x 96mm, AC Volt meter 0- 500 Volts including wiring with 1.5 Sqmm PVC insulated stranded copper conductor cable complete all as specified and directed.

Supply fixing and testing in replacement of UNSV digital type of size 96mm x 96mm, AC Amp meter 0- 200 Amps with including 3 Nos C.T of Ratio 200/5 of class-1.0 including wiring with 1.5 Sqmm PVC insulated stranded copper conductor cable complete all as specified and directed.

Supply fixing and testing in replacement of UNSV insulated connectors 4 pole 100 amps rating including testing complete, all as specified and directed

Supply fixing and testing in replacement of UNSV insulated connectors 4 pole 63 amps rating including testing complete, all as specified and directed

Supply fixing and testing in replacement of UNSV Electronic timers 415 Volts, 50 Hz, AC supply, with delay period of 9-30-Seconds complete all as specified and directed make L&T or equievelent model of specified make as approved by the GE

Supply fixing and testing in replacement of UNSV push button ON/OFF complete in the existing panel Complete connecting electrically all as specified and directed

Supply fixing and testing in replacement of UNSV indicator light red/yellow /green complete in the existing panel Complete connecting electrically all as specified and directed

Supply, fixing, connecting and testing in replacement of UNSV thermostat heating/cooling of any description complete,all as specified and directed.

Supply, fixing, connecting and testing in replacement of UNSV MCCB Triple pole, 250 Amps 415 volts, 50 Hz having breaking capacity 35/36 KA , with adjustable thermal and fixed magnetic setting fixed in existing panel Complete all as specified and directed. Make : L&T /INDO ASIAN/Havells

Supply, fixing, connecting and testing in replacement of UNSV MCCB Triple pole, 200 Amps 415 volts, 50 Hz having breaking capacity 36 KA , with adjustable thermal and fixed magnetic setting fixed in existing panel Complete, all as specified and directed. Make : L&T /INDO ASIAN/Havells

Supply, fixing, connecting and testing in replacement of UNSV MCCB Triple pole, 100 Amps 415 volts, 50 Hz having breaking capacity 25 KA , with adjustable thermal and fixed magnetic setting fixed in existing panel Complete, all as specified and directed. Make : L&T /INDO ASIAN/Havells

Supply, fixing, connecting and testing in replacement of UNSV Honeywell CN7510A2001 valve actuator suitable for existing air cooled air conditioner plant 45 TR complete, all as specified and directed. (Installed at Large Optics Building)

Supply, installation of induced draught FRP cooling tower of 4.54 lac Kcal/hr capacity with FRP water basin, PVC fillings with integral louvers and drift eliminators suitable flow water distribution complete with sparay nozzle, statically and dynamically balanced axial flow type fan-direct driven with TEFC induction motor, suction screen, make up quick fill arrangement, overflow and drain connections with necessary valves and suitable inspection ladder, access arrangement for cooling tower interior, M.S. supporting frame, etc complete as required. Cooling Tower 'POLO' FRP Square shape Model No. S-87A to 100 TR Capacity as per following technical specifications. 1. Cooling Tower type: Induced draft counter flow, 2. Cooling Tower Maufacturer: Wildon Engineers (India) 3. Cooling tower make: 'POLO' (Weldon), 4. Cooling tower model/TR Cap: S-87A/100 TR, 5. Heat rejection: 375000 K cal/Hr 6. Water flow rate (Total): 400 USGPM, 7. Hot water temperature: 97.5°F, 8. Cold water temperature: 90°F, 9. Design wet bulb temperature: 83°F , 10. Height of cooling tower: 3300 Mm, 11. Length of cooling tower: 2400 Mm, 12. Width of cooling tower: 2100 Mm, 13. Fill depth: 600 Mm, 14. Wetted surface area: 734 M2, 15. Static Weight of CT: 1550 Kgs, 16. Design range: 7.5°F, 17. Design approach: 7°C, 18. Fill flute size: 12 mm, 19. Fill type: Honey comb, 20. No. of fan per coolin tower: One, 21. Fan diameter/Airflow: 1500/25200 CFM, 22. Fan RPM: 960 rpm MATERIAL OF CONSTRUCTION 23. Casing: FRP, 24. Fill: FIRGIN PVC, 25. Eliminators: PVC, 26. Supporting structures: MS HDG, 27. Cold water basin: FRP, 28. Hot water distribution PVC header, 29. Fan blades: Cast aluminium alloy, 30. Fan hub: Cast aluminium alloy, 31. Evaporation loss % of total water in circulation: 0.75%, 32. Drift loss % of total water in circulation: 0.05% 33. Total make up water % of total water in circulation: 0.8%, 34. Hot water inlet size: 125 mm, 35. Cold water inlet size: 125 mm, 36. Over flow connection: 50 mm, 37. Drain connection: 50 mm, 38. Make-up connection: 25 mm MOTOR 39. Motor type: TEFC, direct driven, 40. Motor current characteristics: 415/50/3 V/Hz/Ph, 41. Motor HP: 5 HP, 42. Motor rating: 3.7 KW, 43. Motor RPM: 960 RPM, 44. Motor Make: Oswal/Sabar/equivalent, 45. Base frame MS: MS,

Supply & fixing 80 TR AC Plant PLC Card etc complete all as specified and directed. (Installed at Photonics Building ) Model No - VLRP SINGLE V1, Type - DELUX Range - 8/8/8

Installation only split type AC including indoor/outdoor unit of capacity 1.5 Ton/2 Ton after carried out the repair under item at new location as directed including providing necessary chiseling/ cutting for fix the indoor/outdoor unit by means of suitable size of nut, bolt, angle iron structure, masonry work and making good the disturbed surface with PCC, plastering,white wash works,testing & checking complete,all as directed & specified by Engineer-in-Charge. (Note :- The spare parts measured & paid separately as supply only rates. Rate for fixing of spare parts (ie compressor, condensing coil, blower motor and nut bolt angle iron structure) under relevant items shall be included in this item) complete all as specified and directed

Supply & Fixing in replacement of unserviceable Oudoor unit body complete with compressor unit suitable for existing Split type AC of 1.5 TR capacity complete all as specified and directed

Supply & Fixing in replacement of unserviceable indoor unit body complete suitable for existing Split type AC of 1.5 TR capacity complete all as specified and directed

AIRCOM (BID ID -3071274)

MAHADEV ELECTRICALS (BID ID -3081747)