MAINTENANCE TO CENTRAL AIR CONDITIONING PLANTS AT AF STN BHUJ

Amount

M & L for preventive maintenance of LT panel of any size including tightening the connections of cable from MCCB / Contactor / switches, replacing all lug with new of any size aluminium / copper, replacing the complete internal wiring, copper cable by 16 Sqmm single core FRLS multistranded connection between MCCBs and connector , contactors , replacing connector of size 40 Amps to 100 Ams, TPN set by new connectors complete all as specified and directed. Note: Material such as 16 Sqmm copper wire, connector, contactor, MCB, MCCBs, Starters, phase preventer will be measured and paid saperately.

S & F in repair thermal overload relay (Auto / manual reset) for power contactor type NO/ NC having variable relay range from upto 25 Amps 3 Phase, 415 Volt all as per existing installed on site and as specified and directed by Engineer-in-charge. Note : Make shall be proivded as per existing make and as approved by GE

S & F in repair MCCBs 415 Volts, 4 Pole Fixed type 100 Amps with Braking capacity 25 KA all as specified and directed by Engineer-in-charge.

S & F in repair MCCBs 415 Volts, 4 Pole Fixed type to 125 Amps with Braking capacity 25 KA all as specified and directed by Engineer-in-charge.

S & F in repair MCCBs 415 Volts, 4 Pole Fixed type 160 Amps with Braking capacity 25 KA all as specified and directed by Engineer-in-charge.

S & F in repair MCCBs 415 Volts, 4 Pole Fixed type 250 Amps with Braking capacity 35 KA all as specified and directed by Engineer-in-charge.

S & F in repair MCB 415 Volts, 4 Pole Fixed type 40 Amps with Braking capacity 10 KA all as specified and directed by Engineer-in-charge.

S & F in repair MCB 415 Volts, 4 Pole Fixed type 63 Amps with Braking capacity 10 KA all as specified and directed by Engineer-in-charge.

S & F in repair Single phase preventer relay with adustable time on delay 6/7 wire , 415 V SPPR type SDz5 all as specified and directed by Engineer-in-charge.

S & F in repair 3 pole power contactor AC, 415 V ,9 Amps type NO/NC built in surge, along with auxiliary contactor as per installed / existing all as specified and directed by Engineer-in-charge.

S & F in repair 3 pole power contactor AC, 415 V, 12 Amps type NO/NC built in surge, along with auxiliary contactor as per installed / existing all as specified and directed by Engineer-in-charge.

S & F in repair 3 pole power contactor AC, 415 V, 18 Amps type NO/NC built in surge along with auxiliary contactor as per installed / existing all as specified and directed by Engineer-in-charge.

S & F in repair 3 pole power contactor AC, 415 V, 25 Amps type NO/NC built in surge along with auxiliary contactor installed / existing all as specified and directed by Engineer-in-charge.

S & F in repair 3 pole power contactor AC, 415 V, 32 Amps type NO/NC built in surge along with auxiliary contactor installed / existing all as specified and directed by Engineer-in-charge.

All as per item No.14 above but for 40 Amps

S & F in repair 3 pole power contactor AC, 415 V, 65 Amps type NO/NC built in surge along with auxiliary contactor installed / existing / Add on block (mino contactor) all as specified and directed by Engineer-in-charge.

S & F in repair 3 pole power contactor AC, 415 V, 100 Amps type NO/NC built in surge along with auxiliary contactor installed/ existing/ Add on block (mino contactor) all as specified and directed by Engineer-in-charge.

S & F in repair three phase cable connector with base strip 415 volts, TPN set 63 Amps all as specified and directed by Engineer-in-charge.

S & F in repair three phase cable connector with base strip 415 volts, TPN 100 Amps as specified and directed by Engineer-in-charge.

S & F in repair fan belts V shape of size B-79 having nylone thread reinforced and skid tigh tensile strength, notchs for proper griping on pully or wheel all as directed by Engineer in charge.

All as per item No.20 above but of size B-70

All as per item No.20 above but of size B-76

All as per item No.20 above but of size B-57

All as per item No.20 above but of size B-54

All as per item No.20 above but of size A-31

All as per item No.20 above but of size A-28

All as per item No.20 above but of size A-22

All as per item No.20 above but of size A-20

M & L for opening outdoor unit at site taking out unservisible condenser motor, S & F in repair burnt out unservisible condenser motor 0.37 Kw (0.5 HP), 230 V 50 HZ, 900 - 1000 rpm single phase from outdoor unit of package type AC plant complete all as specified and directed. Note: Make shall be proivded as per existing make and as approved by GE

M & L for opening outdoor unit at site taking out broken / defective condenser motor fan blade size 450 mm sweep , S & F in repair, testing condenser motor fan blade size 450 mm ( 3/ 4 blade ) suitable for 0.37 Kw (0.45 HP), 230 V 50 HZ, IP 55 single phase condenser motor sweep package type AC plant all as specified and directed by engineer - in charge.

Suply and fix in repair Dry all liquid line filter drier , working temperature range -400C to 800C, for respective capacity 5.5 TR to 12 TR AC plants with both end leak proof connection to liquid line all as per Engineer-in-charge. Note: Make shall be proivded as per existing make and as approved by GE

S & F in repairs expansion valve of capacity 5.5 TR / 6 TR all as per Engineer-in-charge.

S & F in repairs expansion valve of capacity 8.5 TR / 9 TR complete all as specified and directed.

S & F in repairs expansion valve of capacity 11 TR /12 TRcomplete all as specified and directed. Note for items No 32 to 34: Make shall be proivded as per existing make and as approved by GE

S & F in repair remote control set with remot circuit panel and suitable cord for Tower / wall mounted room air conditioner 4TR capacity all as specified and directed by Engineer-in-charge. Note: Make shall be proivded as per existing make and as approved by GE

S & F in repair remote control circuit set, electric panel and suitable cord including sensors , controller for package type AC plant 8.75 TR to 12 TR for controling temperature, cutoff compressor, on / off mode, fan swing with digital indicator / display by sensing all paremeters all as specified and directed by engineer in charge. Note: Make shall be proivded as per existing make and as approved by GE

M & L for opening air handling unit in AHU room , taking out air blower cuppled with 3HP to 10 HP electric motor, S & F in repair new central rotating shaft along with new pedestal block with bearing for bolwer shaft, on both side size inner dia 25 /65 mm, greasing, , testing and refixing same blower in air handling unit, closing air handling unit same as original all as specified and directed by Engineer-in-charge.

M & L for tracing out leakage location in AC plant refrigerant circuit ( suction /delivery line condenser line, valves, connection location) arresting the leakage location by brazing / soldering and Supply and filling refrigerant gas R-22 lossed in leakage / repair/ maint work including testing of pressure level, leakage.

M & L for tracing out leakage location in AC plant refrigerant circuit( suction /delivery line condenser line, valves, connection location) arresting the leakage location by brazing / soldering and Supply and filling refrigrant gas R-410A lossed in leakage / repair/ maint work including testing of pressure level, leakage.

M & L for tracing out leakage location in AC plant refrigerant circuit (suction /delivery line condenser line, valves, connection location) arresting the leakage location by brazing / soldering and Supply and filling refrigerant gas R-407 lossed in leakage / repair/ maint work including testing of pressure level, leakage.

M & L for disconnecting old unservisible compressor including electrical wire connection , suction and delivery line from installed location, fix in repair of scroll compressor capacity 4.0/4.5/5.0 TR for Gas R-22/ R407C/R410 for split type tower / casset AC / package type AC including fixing , connection & out going pipe, pressure testing, welding, brazing connection basing etc all as originally fixed, specified and directed by Engineer-in -charge. Note: Refrigerant gas will be measured and paid saperately. Note: Make shall be proivded as per existing make and as approved by GE

M & L for disconnecting old unservisible compressor including electrical wire connection , suction and delivery line from installed location, fix in repair of scroll compressor of 8.75 TR capacity model no CSC673___ /CSC753 in air/water cooled chilled based split type AC plant/ package type AC including fixing , connection & out going pipe, pressure testing, welding, brazing connection basing etc all as originally fixed, specified and directed by Engineer-in -charge. Note: Refrigerant gas will be measured and paid saperately.

M & L for disconnecting old unservisible compressor including electrical wire connection , suction and delivery line from installed location, fix in repair of scroll compressor of 8.75 TR capacity model no SM120___ in air/water cooled chilled based split type AC plant/ package type AC including fixing , connection & out going pipe, pressure testing, welding, brazing connection basing etc all as originally fixed, specified and directed by Engineer-in -charge. Note: Refrigerant gas will be measured and paid saperately.

M & L for disconnecting old unservisible compressor including electrical wire connection , suction and delivery line from installed location, fix in repair of scroll compressor having thread end (flare end) for suction and delivery of 12 TR capacity model no SM185____ in air/water cooled chilled based split type AC plant/ package type AC including fixing , connection & out going pipe, pressure testing, welding, brazing connection basing etc all as originally fixed, specified and directed by Engineer-in -charge. Note: Refrigerant gas will be measured and paid saperately.

M & L for disconnecting old unservisible compressor including electrical wire connection , suction and delivery line from installed location, fix in repair of scroll compressor having thread end (flare end) for suction and delivery of 12 TR capacity model no SZ185__ in air/water cooled chilled based split type AC plant/ package type AC including fixing , connection & out going pipe, pressure testing, welding, brazing connection basing etc all as originally fixed, specified and directed by Engineer-in -charge. Note: Refrigerant gas will be measured and paid saperately.

Disconnecting the electric connection of the defective motor of any make from panel board , dismentling from centrifugal pumping set/ bolwer / colling tower, transporting to workshop and dismentling motor , taking out burnt copper winding of motor, cleaning the casing, pump with wire brush, rewinding the motor using synthetic enamelled copper wire of existing gauge, re-assembling the motor to its original form, after repair of defective parts as its original parts , bringing back to site of work, reconnecting electrical connection , recoupling with centrifugal pump set for satisfaction running to the satisfactory of Engineer-in-charge for the capacities 7.5 HP to 10 HP of motors.

All as per item no 46 but of capacity 5 HP

All as per item no 46 but of capacity 2 HP to 3 HP

All as per item no 46 but of capacity 1 HP

M & L for descaling of condenser shell and tube using sulphamic acid and feeding in a cyclic way by high pressure pump for 30 min cycles till the PH valve of fresh water inserted & collected is 7.0 and cleaning outer part with brush and rod by suitable method including S & Fing rubber gasket all as directed by engineer in charge.

M & L for descaling of condenser shell and tube using sulphamic acid and feeding in a cyclic way by high pressure pump for suitable no. of times cycles till the PH valve of fresh water inserted & collected is 7.0 and cleaning outer part with brush and rod by suitable method including S & Fing rubber gasket all as directed by engineer in charge.

S & F in repair PVC fills as per existing at site to its original quantity and position of cooling tower modular construction FRP type of capacity 30TR-50TR all as directed by engineer in charge.

S & F in repair of Copper condenser with copper fins installed in outdoor of 8.75TR (50 X 36 X 2 mm) Package/Central type AC plant including connection of suction and delivery line, pressure testing all as directed by engineer in charge.

S & F in repair of Copper condenser installed in outdoor of 5.5TR (50 X 28 X 2 mm) Package/Central type AC plant including connection of suction and delivery line, pressure testing all as directed by engineer in charge.

S & F in repair of Copper condenser installed in outdoor of 11TR / 12TR (77 X 45 X 2 mm) Package/Central type AC plant including connection of suction and delivery line, pressure testing all as directed by engineer in charge.

M & L for cleaning and removal of the dust from Outdoor unit/Air handling unit/ Cooling coil of central/Package Type AC plant of 5.0 to 50.0 TR by washing with water or by suitable method including cleaning of air filter, supply and replacement of damaged wires with copper wire PVC insulated of existing size, tightening of loose wire, nuts, bolts, servicing of condenser motor by oiling, greasing, setting of grills alignment complete including refixing in original position including provision of thermocol for air tightness, testing and commissioning to the entire satisfaction complete all as specified and directed by Engr-In-Charge.

S & F in repair thermister temperature sensor suitable for 22.0 TR/24.0 TR aircooled chiller. Note : Make shall be provided as per existing make and as approved by GE.

M & L for comprehensive maintenance of 2x100 TR (One working and one standby) Air Cooled Chiller plant as per under mentioned detaiils for 09 months period complete all as specified and directed by Engr-In-Charge. (i) Details of equipment/machinery includes for which comprehensive maintenance will be carried out include. (a) 02 Nos. Chiller compressor of 100TR each having model No.LCAX1-03750A, Ser No.CRI00006/CRI00007, Make-Bluestar with all connected equipments of basic refregeration cycle of chiller plant like evaporator/condenser/expansion valve/sensor/control panel etc. Note:- (1) Comprehensive maintenance of air conditioning plant shall be carried out as per manufacturer's standard check list and detailed as under all as directed by Engr-In-Charge. (a) Testing/Checking of compressor for its proper functioning and rectification of defects if any. (b) Testing/Checking of control switch such as pressure cut outs, water flow switch, temperature sensor for proper functioning. (c) Testing/Checking of PCBs, microprocessor, control panel, control boards, transducers of chillers/condensing unit for their correctness and replace if necessary for its proper functioning and rectification of defects if any.

(d) Testing/Checking of refregeration pipe line network for leakage and rectification of leakage by brazing. (e) Testing/Checking & servicing of blower fan motor and rectification of defect if any. (f) Testing/Checking of all electrical connection and control wiring tighting of electrical connection and rectification of defect if any complete. (g) Testing/Checking & servicing of condenser fan motor and rectification of defect if any complete. (h) Testing/Checking of condenser coil for leakage and rectification of leakage by brazing including cleaning of condenser coil. (j) Testing/Checking of refregerant pipe for leakage and rectification of leakage by brazing including cleaning of refregerant pipe. (k) Cleaning of entire chiller plant machinery/equipment of basic refregeration cycle network. (2) Contractor shall also be responsible to rectify any defect during break down without any extra cost during contract period. (i) Free replacing of defective/worn out parts with new or repaired parts for compressor/thermostat/cutouts as per site requirement will be deemed included in quoted rate. (ii) Topping of refregerant gas will be deemed included in quoted rate. (iii) Charging of nitrogen gas in unit & complete system at 300 psi pressure and checking of any dropping of pressure/leakage for suitable time period after rectification of leakage if any. Vaccumisation of complete system and charging of adequate quantity of refregerant gas. (iv) The rates quoted by the tenderer shall be deemed to include for any repair, which are obviously and fairly, intended which may not have been included in these documents but which are essential for the execution and entire completion of works. (v) Comprehensive maintenance including servicing/cleaning of entire chiller plant machinery/equipment of basic refregeration cycle network & repairing the plant during breakdown/emergency shall be carried out through authorised representative of OEM. Contractor shall submit necessary documentary proof (MOU) in support of the same.

M & L for cover the insulation of exposed hot water MS piping of 40/50 mm dia with treated woven glass fiber reinforced covering (Markin white clothing) with suitable solution complete all as specified and directed.

M & L for insulation of 9mm thick for exposed piping MS piping of 40/50 mm dia with closed cell elastrometric nitrile rubber of density 43Kg/m3, Thermal conductivity n.exc 0.035 W/Mo K Class 1, fire performance to pass class 1 as per BS 476 part 6 & class O as per BS 476 part 7 & use recommended adhesive/SR Fevicol 505 grade complete all as specified and directed.

M & L for aluminium sheet 0.8 mm thick as in covering/cladding of rubber insulation of hot water piping/GI sheet ducting including grooving, screwing etc complete all as specified and directed by Eng-in-Charge.

Fabricating, supplying, installing, testing and balancing GI sheet with TDF flange rectangular/ square duct made out of 'L' shaped hollow profile duly factory boxed, including all accessories such as corner, cleat, carriage bolt, support, suspender, tie rod, gasket and appropriate sealant on longitudinal joints etc complete of size 20 gauge complete all as specified and as directed by Engr-in-charge

Supply & erection of 25mm thick nitrile duct insulation with aluminum foil, thermal insulation shall be 25mm thick non-fibrous, fire retardant, closed cell, tri-dimensional chemically cross linked polyethylene foam conforms to class 'O' for fire propagation and class 1 for surface spread of flame & factory laminated aluminum foil including applying rubber based adhesive CPRX compound complete all as specified and as directed by Engr-in-charge. Note: (i) After fixing of insulation the complete insulation should be tied with vergin PVC tape duly climped with clamps at an equal interval of 30 cm. (ii) Amount of PVC tape deemed to be included in rate quoted by contractor.

M & L for structural steel work for supports of ducting work complete all as specified and directed by Engr-In-charge

M & L for rough excavation n.exc 1.5m deep and getting out in soft/loose soil complete all as specified and directed by Engr-In-Charge.

M & L for cement concrete in type C2, (1:3:6) (40mm graded stone aggregate) in foudation filling and mass concrete etc complete all as specified and directed by Engr-In-Charge.

Removing excavated material(soil) n.exc 50m and depositing where directed at a level n.exc 1.5 m above the starting point in soft/loose soil.

Supply, installation and testing of monoblock condensor/ chiller pump of capacity 3 HP, three phase, available head 6-14m with suitable delivery size to existing including taking down old pump all as specified and directed by Engr-In-Charge.

S & F 100mm dia MS pipe heavy grade with all fittings laid in floors or fixed to walls and ceilings etc complete all as specified and directed by Engr-In-Charge.

All as per item No.69 above but of size 80mm

All as per item No.69 above but of size 65mm

All as per item No.69 above but of size 40mm

Supply, installation and testing of butterfly valves (manual) with CI body, SS disc, nitrile rubber seal and O ring, PN 1.6 pressure rating of size 80mm including taking down old valves.

All as per item No.73 above but of size 65mm

All as per item No.73 above but of size 50/40mm

S & F in repair of gun metal gate valve of size 32mm bore, with iron wheel head, screwed both ends for iron pipe and fixed.

Supply, installation and testing of Y-type strainer (40 mesh) of 80mm dia of ductile iron body flanged ends with stainless steel strainer.

1R K Traders (BID ID -3064246)

M/s Bombay Novelty Stores (BID ID -3061585)

Pelectricals (BID ID -3067447)