Repair and maint of centralized AC and Heating system of Amn storage at Khundru under GE 861 EWS

Amount

Comprehensive maintenance of package type AC plant of capacity 3 x 22.7 TR comprising of following equipments at MSL shed mentioned below complete all as specified and directed. (a) Scroll type compressor -06 Nos (b) Compressor motor-06 Nos (c) Fan motor -03 Nos (d) Air handling unit with blower motor-01 No (e) Electrical control panel cubical type floor mounted complete with main switch, MCCBs, MCBs, Voltmeter, ammeter, automatic star delta starter for compressors, AHU, pumps, etc complete - 01 Set (f) Air supply duct with grill diffusers, dampers and heater back of each complete- 01 Set (g) MS piping, valves, pressure guage, temparature guage, complete-01 Set (h) Digital type thermometer -01 Set (j) Oil tank, Expansion Tank, Glycol Tank (k) Chiller motor, boiler motor, oil tank motor

Servicing by dismantling/ disconnecting taking out worn/ defective parts carefully after unscrewing the nuts, bolts, cleaning thoroughly. Repair/ replacement of defective parts to make fully serviceable of 03 x boiler of capacity 85000KCL testing complete all as specified and directed.

Taking down unserviceable burner from oil fired hot water generator and replacing it with new burner for boiler of capacity 85000KCL, automatic monoblock burner assembly, complete all as specified and directed

Refilling of Glycol of Chiller plant with anti freeze properties, of glycol concentrate along with the necessary additives and inhibitor in cognition in sealed barrel complete all as specified and directed. Note: The glycol concentrate shall be mixed with potable water supplied by contractor and filled in central pipe line after proper leak test of entire circuit, the glycol water mixture ratio shall be 40:60 or and freezing temperature should be (-) 25° C.

S&F in replacement GLYCOL CIRCULATION CENTRIFUGAL PUMPS FOR CHILLERS/BOILERS : Supply, installation, testing & commissioning of monoblock centrifugal pump driven by suitable capacity electric motor for ethylene glycol of 25 Mtr head complete with accessories including cement concrete foundation and all as specified and directed of following flow rates including conecting and testing Suitable for Existing Inlet, out let pipe line :- (a) 120 LPM Note : Including connecting and testing suitable for existing inlet, outlet pipeline.

Over hauling of Monoblock pump set of capacity upto 3/2 HP after removing from the base plate, disconnecting from pipe line, dismantling the pump set, replacing unserviceable gland packing, gun metal bush, bearing, water seal, applying grease, vibration pad etc. complete and reassembling the pump set connecting with pipe line reconnection of electric supply, including nuts, bolts, gaskets etc. complete testing of pumps for smooth functioning complete all as specified and directed

Refilling of refrigerant 407R in chiller including pressure testing for 72 Hrs complete all as specified and directed.

Repair /replacement of chiller relay suitable for 24 TR Chiller unit present on site, complete all as specified and directed. Note : The Contractor shall quote the rate of repair/ replacement of existing contactor of suitable rating 65/75A, 3 Phase with suitable breaking range not less than 220V alongwith auxiliary contactor of suitable power contactor of suitable size as per existing.

Inspection and overhauling the compressor unit of chiller (non functional items should be replaced by contractor), complete all as specified and directed. Note : The contractor shall quote the rates including the necessary tools and plants required for carrying out the over hauling of compressor and refixing back on site.

Material and labour for disconnecting condenser for descaling, plugging them & providing of 15mm tee out let for local circulation of mild acid solution in the condenser (separate container and small pump set to circulate diluted acid solution to be used) PH value of solution to be circulated & to be kept 4 and checking frequently i.e. every one hour during the operation Scalgun WS solution to be used for descaling purpose after 2 to 3 hours of cleaning if PH value remains less than, four flush with fresh water mixed with sodium carbonate tubes and cleaning after closing the end covers, circulating diluted acid solution as specified above, to maintaine PH value as above & flushing the same with fresh water including recharging of stored refrigerant up to required pressure of capacity 6x 24/23 TR plant complete all as specified and directed.

Pumping down the chiller plant to preserve the existing in refrigerant gas & leak testing of plant by charging of nitrogen gas in to entire plant & monitoring for 24hrs to find the leakages, rectification of leak by brazing & replacement of necessary gasket packing wherever required including copper tubes of suitable size vacumising of the plant by vacuum pump & keeping 24hrs for pressure testing including rectification of leakages (if any) finally recharging of existing refrigerant gas to the plant and topping up of refrigerant if required to maintain the standard pressure complete testing of the plant for smooth functioning complete all as specified and directed.

Complete servicing of the AHU unit of cooling/Hot coils and AHU filters by dismantling the filter section, damper section, blower section complete cleaning and removal of the dust particles and cleaning the chocked fins, by using the appropriate chemicals, flushing till removal of the complete chocking across the cooling/hot coils, make free for air flow across the coil, to improve the efficiency of the cooling/hot coils including necessary rust proofing to the bottom base tray, coil tray, renewal of rusted bolts and nuts, refixing back the dismantled parts complete all as specified and directed.

Removing the existing fully chocked/unserviceable micro filter of AHU and supply and fixing new mirco filter with HDPE 400 media 10 micro rating filters to AHU's outer size 610(H)x610(Wx50mm(D) including renewal of nuts,bolts and washer complete all as specified and directed.

Taking out burnt winding from 10 HP motor of AHU and cleaning with CTC solution and rewinding the electric motor with super enamelled heavy duty winding wire of existing gauge and existing Nos of turn with and including insulation material insulation paper, varnish and baking up till the complete insulation dried, including transport charges etc, complete all as as specified and directed.

Taking down the damaged V-Belts of size B-42 and supply & fixing V-Belts with suitable slack adjustment and alignment complete all as specified and directed.

Cleaning of mild steel fuel gas chimney made out of 3mm thick mild steel sheet, 6 mtr long 150mm dia of the plant room including connection to independent boiler, inside building fiber glass insulation wool of 24kg/cum with alluminium cladding etc, complete all as specified and directed.

S&F in replacement of old damaged / unserviceable ball valves of size 25mm dia,screwed down, high pressure, with crutch or butterfly handle, screwed both ends for iron pipe or for unions and fixed connection pipes complete all as specified and directed.

S&F in replacement of old damaged / unserviceable ball valves of size 15mm dia,screwed down, high pressure, with crutch or butterfly handle, screwed both ends for iron pipe or for unions and fixed connection pipes complete all as specified and directed.

S&F in replacement of old damaged / unserviceable butter fly valves of size 65mm dia,made out of cast iron complete all as specified and directed.

S&F in replacement of old damaged / unserviceable butter fly valves of size 50mm dia,made out of cast iron complete all as specified and directed.

S&F in replacement of Y strainer ofsize 50mm with fittings nuts, bolts, gasket & all fixing arrangement all as specified and directed.

S&F in replacement of the dial type Pressure Gauges of 100mm dia with cocks and syphon complete with all fittings etc all as specified and directed.

S&F in replacement of Temperature Gauges of size 50/65 mm dia complete with all fittings etc all as specified and directed.

S&F in replacement of automatic air plunger valves of nominal size 25mm complete with all fittings etc all as specified and directed.

S&F in replacement of three way motorised mixing valve with actuator, temperature sensor & controller etc complete all as specified and directed.

S&F in replacement of Digital level indicator for Glycol fluid tank etc all as specified and directed.

S&F in replacement of Digital level indicator for Day oil storage tank etc all as specified and directed.

S&F in replacement Vibration pads for pumps etc all as specified and directed.

S&F in replacement power contactors, suitable for 24 TR chiller unit present on site MNX25 three phase, 415V complete all as specified and directed. Note : The Contractor shall quote the rate of repair/ replacement of existing contactor of suitable rating 65/75A, 3 Phase with suitable breaking range not less than 220V alongwith auxiliary contactor of suitable power contactor of suitable size as per existing.

S&F in replacement Auxillary contactors suitable for 24 TR chiller unit present on site 1NO+1NC three phase, 415V complete all as specified and directed. Note : The Contractor shall quote the rate of repair/ replacement of existing contactor of suitable rating 65/75A, 3 Phase with suitable breaking range not less than 220V alongwith auxiliary contactor of suitable power contactor of suitable size as per existing.

Earthing complete with galvanised steel earth plate electrode 600x600x6mm thick buried directly in ground (earth pit not less than 2.25 mtr below normal ground level) with top edge of the plate not less than 1.5 mtr below ground level connected to galvanised iron strip 32x6mm means of bolts, nuts check nut & washers of galvanised iron or steel & connected to main switch including complete excavation and earth work in soft/loose soil and disposal of surplus soil to a distance not exc 50 meters, PCC Chamber (1:3:6) type C-2 precast RCC cover with frame, funnel wire mesh, 20mm bore light grade galvanised iron or steel pipe for water, charcoal or coke and salt in alternative layers of 15cm compacted thickness all round the earth electrode complete all as shown in electrical plate No 3 of SSR part-I including welding with suitble electrode and testing Including taking down existing earthing complete all as specified and directed.. Note :- (i) Main earthing strip from earth plate electrode to test point upto length of 7.5 mtrs length shall be deemed to be included in the unit rate quoted against this item. (ii) Cost of tubing GI medium grade 40mm dia for protection of earthing strip and passing the Road/passes and etc. shall be deemed to be included in the unit rate quoted against this item. (iii) On testing after completion if the desired resistance is not obtained, the contractor shall redo the earthing without any extra cost to the department .

Supply and laying in replacement of old damaged/ rusted MS black ERW pipe class 'C' of size 32 mm heavy for HSD line including cost of bends, reducer, flanges, nuts, bolts etc complete all as specified and directed. Note : Cost of welding is deemed to be included in the rate quoted.

Supply and laying in replacement of old damaged/ rusted MS black ERW pipe class 'C' of size 25 mm heavy for HSD line inclding cost of bends, reducer, flanges, nuts, bolts etc complete all as specified and directed. Note : Cost of welding is deemed to be included in the rate quoted.

Supply and laying in replacement of old damaged/ rusted MS black ERW pipe class 'C' of size 65 mm piping complete with fitting duly insulated with 25mm thick nitrile insulation duly insulated thickness mentioned there in with closed cell elastomeric insulation 30 to 40 kg/m3 density covered with shrink polyethlene sheet etc complete all as specified and directed. Note : Cost of welding is deemed to be included in the rate quoted.

Supply and laying in replacement of old damaged/ rusted MS black ERW pipe class 'C' of size 50 mm piping complete with fitting duly insulated with 25mm thick nitrile insulation duly insulated thickness mentioned there in with closed cell elastomeric insulation 30 to 40 kg/m3 density covered with shrink polyethlene sheet etc complete all as specified and directed. Note : Cost of welding is deemed to be included in the rate quoted.

Supply & fixing in replacement of grill diffusers made of size 250mm dia large format adustable jet diffuser with plate made of aluminium, powder coated with all mounting arrangements all as specified and directed.

S&F testing and commissioning in replacement of damper actuator/smoke senser of motorised spring return Actuator for device upto 0.8 sq mtr with control panel smoke senser & temperture senser complete all as specified and directed.

Over hauling of Humidifier of capacity 5ltrs/Hrs ultra sonic electric Atomizing humidifier emits fine mist into duct with isolation brass gate valve all as specified and directed. Note : The system shall comprise as required and for automatic operation as per specifications.

M&L lagging for the 20mm GI tubing in external water supply of plumbing all around with 25mm thick bonded mineral wool pre-formed. SNAPON pipe section of density 144 Kg/Cum conforming to IS-9842 or equivalent and provided chicken wire mesh netting 25gauge 20mm meshing and plaster of Paris 3 to 5 mm thick all around the mesh after breaking old unserviceable/ broken lagging all as specified and directed.

M&L lagging to pipes used in external water supply of plumbing all around with 25mm thick bonded mineral wool pre-formed. SNAPON pipe section of density 144 Kg/Cum conforming to IS-9842 or equivalent and provided chicken wire mesh netting 25 gauge 20mm meshing and plaster of Paris 3 to 5 mm thick all around the mesh after breaking old unserviceable/ broken lagging for the 25mm GI tubing, complete all as specified and directed.

M&L lagging to pipes used in external water supply of plumbing all around with 25mm thick bonded mineral wool pre-formed. SNAPON pipe section of density 144 Kg/Cum conforming to IS-9842 or equivalent and provided chicken wire mesh netting 25 gauge 20mm meshing and plaster of Paris 3 to 5 mm thick all around the mesh after breaking old unserviceable/ broken lagging for the 15mm GI tubing complete all as specefied and directed.

Supply , installation ,commissning and testing in repairs Electron indoor/out door Temperature sensor with suitable flame proof cable minimum 10 m length and measuring range -20 to 50 degree celsius.and other connected accessories etc complete all as specified and directed.

Notes :- An amount of Rs. 4726.00 on account of Credit Schedule for Schedule 'A' Part-II shall be deducted from total quoted amount of BOQ to arrive at the contract sum.

M/S BHAT ENGINEERING WORKS (BID ID -3486762)

M/S SMA and SONS CONSTRUCTIONS (BID ID -3486093)

VISHWA MITTAR PACHYALA (BID ID -3486153)