COMPREHENSIVE MAINTENANCE AND REPAIR WORK OF CENTRAL AC PLANT, PACKAGE TYPE AC PLANTS SPLIT AC WIDOW AC AND ALLIED WORKS INCLUDING CONNECTED MISC ITEMS AT DEAL 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 by Engr-in-Chagre 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. (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

15 TR capacity AC Plant Package type

2X15 TR capacity Central AC plant

2X27 TR capacity central AC Plant

VRV 16 HP heat pump type AC unit

Servicing/ overhauling/ greasing of condensor coil, cooling coil and evaporator coil etc replacement of packing gasket, nuts, bolts with washer, testing of water line for leakage & repairing of pipe line to make it leak proof of capacity 3X11TR package type AC Plant (installed at Technical Area. DEAL) complete all as specified and directed.

Dismantling the head from compressor fitted in system, and strip opening of compressor head of twin cylinder for Model SMC 6-65 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 SMC 4/6-65 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. 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 ACCEL make compressors of Model SMC 4-65 installed at SATCOM building at Tech area dismantled / fixed complete all as specified and directed .

Set of aluminuam washer set

Oil pump assembly.

Shaft seal assembly.

Discharge valve assembly inside compressor (R-22)

Gasket set complete for SMC 4-65.

Set of neoperne ''O" ring set for SMC 4-65.

Oil pressure regulator valve.

Suction stop valve 'o' ring set"

Discharge stop valve 'o' ring set

Discharge valve assembly

Suction valve assembly

Safety valve assembly

Piston ring set

Taflon sheet discharge and suction valve

Supply only following items / spare parts suitable for Air Control and Chemical Engg. Co Ltd make compressors of Model SMC 6-65 installed at PRC Bldg dismantled / fixed under Sch ‘A’ here in above complete all as specified and directed .

MainBushing with detachable coller for repair .50/.75mm u.s.

Connecting rod

Bolt for Connecting rod

Castle nut

Split pin

Guide pin

Big end bearing (half section bearing) 0.050/.0.75 MM U.S.

Crank shaft SMC 6-65

Oil pump assembly.

Shaft seal assembly.

Piston with pin and rings

Cylinder liner for R-22. with suction valve

Single frame unloader- 65 (bracket).

Busing for piston pin.

Discharge valve assembly (R-22)

Gasket set complete for SMC 6-65.

(Set of neoperne ''O" ring set for SMC 6-65.

Oil pressure regulator valve.

Suction stop valve 'O' RING SET" with nylon washer

Discharge stop valve 'O' RIG SET" with nylon washer

Safety valve assembly

V BELT B-68

V BELT B-105

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/R-407 in the system and testing the complete plant for working pressure for 24 hours complete, all as specified and directed. Note : R-22/R-407 gas shall be measured and paid separately under Schedule ‘A’ Item.

2x15 TR TR capacity AC Plant (installed at SATCOM building )

2x27 TR capacity AC Plant (installed at PRC Building)

3x11 TR capacity AC Plant (installed at EMI/MC BldgTechnical area deal

11 TR capacity AC Plant Package Type (CERS Tech Bldg)

15 TR capacity AC Plant Package type (CERS Tech Bldg)

VRV 16 HP heat pump type AC unit (CERS Tech Bldg)

Supply and fixing/testing in replacement of UNSV compressore 5.5 tr make denfoss/copland scroll compressore R-407/R22 with pressure testing complete, all as specified and directed.

Supply and fixing/testing in replacement of UNSV compressore 7.5 tr make denfoss/copland scroll compressore R-22 with pressure testing complete, all as specified and directed.

Supply and fixing/testing in replacement of UNSV V belt 'A' type as per existing for blower fan of packege type unit 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 3. and here in above 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 only R-407 refrigrant gas with testingn under Sch ‘A’ item 3 here in above complete, all as specified and directed.

Supply fixing and testing in replacement of UNSV condencer safety valve of size ½”, for pressure 300 PSI with and Including 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 water pressure gauge 100 mm dia of range 0 to 100 PSI 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 for central AC plant complete all as specified & directed.

Supply fixing and testing in replacement of UNSV liqud line filtter driers of suitable size for Package type AC plant 11TR complete all as specified & directed.

Supply fixing and testing in replacement of UNSV low pressure control switch type MP-1 with required cutting, flaring/chipping and gas welding ensuring perfectly leak proof joint with pressure testing complete, all as specified and directed

Supply fixing and testing in replacement of UNSV low pressure control switch type MP-5 with required cutting, flaring/chipping and gas welding ensuring perfectly leak proof joint with pressure testing complete, all as specified and directed

Supply fixing and testing in replacement of UNSV low pressure control switch type MP-15 with required cutting, flaring/chipping and gas welding 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 27 TR capacity of central AC plant complete, all as specified and directed.

Supply fixing and testing in replacement of UNSV thermostatic expansion valve (R-22) suitable for 15 TR capacity of central AC plant complete, all as specified and directed.

Supply fixing and testing in replacement of UNSV thermostatic expansion valve (R-22/R 407) suitable for 5.5/7.5 TR capacity of central AC plant complete, all as specified and directed.

Supply fixing and testing in replacement of UNSV liquid line solenoid valve 3 way, voltage rating 230V complete, all as specified and directed

25. Supply fixing and testing in replacement of UNSV capacity control solenoid valve 3 way, voltage rating 230V 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 :- .

3.0 HP capacity, Three phase 50 Hz AC supply

5.0 HP capacity, Three phase 50 Hz AC supply

7.5 HP capacity, Three phase 50 Hz AC supply

Disconnecting and removing old existing non functional electric pump, of any description and in any position from existing platform for pumps and dismantling and opening of the pump, for cleaning oiling/greasing 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 :- .

3.0 HP capacity, Three phase 50 Hz AC supply

5.0 HP capacity, Three phase 50 Hz AC supply

7.5 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 compressor/blowers/pumps/ cooling towers and dismantling the motor, for cleaning oiling/greasing and fixing of serviceable parts including bush, bearing, impeller, seal and gasket etc with nut bolt in position of 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

AHU Room/duct cleaning with the help the of vaccum cleaner by opening grill/defuser etc. and refixing testing complete all as specified and directed.

Installation only split type AC including indoor/outdoor unit of capacity 1.5 Ton/2 Ton after carried out the repair under item No.2 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 specified and directed. (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)

Supply &Fixing in replacement of unserviceable Oudoor unit body complete with out 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

Supply &Fixing in replacement of unserviceable mild steel work as split type AC outdoor/water cooler wheel stand /supporting /protection cage etc. of suitable size of flat iron/Angle iron etc.,cut to shape, including bending and welding as necessary, etc.conforming to Fe.290.Gde-E-165, with and including applying two coats of synthetic enamel paint over a coat of red oxide primer complete all as specified and directed

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.

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.

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 . Make L&T or equievelent model.

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

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

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.

Supply fixing and testing in replacement of UNSV bimetal overload relays directly operated & directly mounted on ML type Power contactor for relay range of 18 to 30 Amps. Make L&T or equievelent model

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.

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/analog 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.

Supply fixing and testing in replacement of UNSV FF type switch 63 Amps capacity complete in the existing panel Complete connecting electrically Model : FF 63 TP of L&T or equivalent complete all as specified and directed

Supply fixing and testing in replacement of UNSV Connector push button ON/OFF complete in the existing panel Complete connecting electrically complete 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 thermostate heating/cooling of any description complete,all as specified and directed.

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, fixing, connecting and testing in replacement of UNSV LT copper armoured cable of size 25 Sqmm 3 core complete all as specified and directed.

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.

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.

Supply, fixing, connecting and testing in replacement of UNSV Globe valve bruss for control of liquid line complete, all as specified and directed.

Supply, fixing, connecting and testing in replacement of UNSV condenser fan motor for package type AC plant complete, all as specified and directed.

Supply, fixing, connecting and testing in replacement of UNSV AC coolent pipe stick for fixing of pipe complete, all as specified and directed.

Supply, fixing, connecting and testing in replacement of UNSV Nipple 3/4" size for draining of water for package type AC plant complete, all as specified and directed.

Supply, fixing, connecting and testing in replacement of UNSV PVC pipe 20 mm dia for draining of water for package type AC plant complete, all as specified and directed.

Supply, fixing, connecting and testing in replacment of UNSV low pressure control switch for size 5/8" copper suction line in 11 TR ac plant complete, all as specified and directed.

Supply, fixing, connecting and testing in replacment of UNSV high pressure control switch for size 1/2" copper discharge line in 11 TR ac plant complete, all as specified and directed.

Supply, fixing, connecting and testing in replacment of UNSV PCB for 11 TR ac plant complete, all as specified and directed.

MAHADEV ELECTRICALS (BID ID -3089017)