REPAIR/MAINTENANCE OF AC PLANT 3 X 50 TR AND OTHER MISC WORKS AT 7 AFH KANPUR CANTT

Amount

Repairs/maintenance of existing Air handling unit of capacity 50 TR along with its cooling coils, filters and following connected works as directed at site by the Engineer-in-Charge :- (i) Removing of 20 Micron filters from existing AHUs and proper cleaning by compressed air flow, dusting out properly and refixing the same. (ii) Normal Wire, brushing of aluminium fins to remove/taking out all dust cleaning of cooling coil by forced spray chemically (such as veni clean solution) all as per entire satisfaction of Engineer-in-Charge. (iii) Cleaning & removing of complete scale of bottom tray and drain pipe of AHUs as directed at site by the Engineer-in-Charge. (iv) Cleaning of drain pipe from AHUs tray to outside plant room manually as well as any de-scaling solution for draining. (Note :- Any defective worn out filters shall be replaced with new one and shall be paid separately in respective item of sch ‘A’).

Supply & fix in repair of 20 Micron air filter of size complete all as specified and directed of following (as per sample of nearest size) :-

(a) 600 x 500 x 46 mm

(b) 500 x 500 x 46 mm

(c) 500 x 400 x 46 mm

(d) 600 x 400 x 46 mm

Supply & fix in repair of water pressure gauge round flush type of range 0-7 Kg/CM2 complete all as specified and directed.

Supply & fix in repair of Digital Thermometer as per existing of range 0 – 100 C complete all as specified and directed. Make :- Remix/JB/Protex/Imperial.

Supply & fix in repair of fan belt for AHU blower motor cap 7.5 HP No 5 PA – 1700 complete all as specified and directed. Make :Fenner/Polyplus or eqivalent as approved by GE.

Supply & fix in repair of water chiller sensor suitable for 50 TR condenser unit chiller model WCDR 050, OMNS/T – 10066 – 1 complete all as specified and directed. Make :- Voltas/ Bluestar/Kirloskar/ Accet Sabroe.

Supply and fix in repair of shaft seal assembly of compressor WCDR 050 PMNS/T- 05060 of existing description and existing make complete all as specified and directed. Make :- Voltas/ Bluestar/Kirloskar/ Accet Sabroe.

Supply and filling in replacement of compressor oil confirming to IS, Oil filter, gasket for compressor 50 TR model No. WCDR 050 PMNS/T- 05060,make :- Voltas by opening of Oil chamber of compressor & cleaning with chemical base solution such as carbon Tetra chloridee including taking pump down for centralization of Refrigerent Gas R-22 including testing etc complete all as specified and directed.

De-Scaling of condenser cells & tubes by de- scaling solution & opening both ends cover plates cleaning with wire brushes to remove the deposited sealing in condenser unit of central Air Conditioning plant of capacity 50 TR complete all as specified and directed.

Detection of leakage and repairing of central type AC Plant of capacity 50 TR capacity by leak testing, leak repairing, pressure testing with nitrogen, vaccumising complete system of central type AC plant with double stage vaccum pump of atmospheric pressure less than 28 to 30mm/HG and charging of refrigerant gas upto required pressure after satisfactory results complete all as specified and directed. Note :- Supply of Nitrogen gas and refrigerant will be measured and paid separately and labour component for pressure testing with Nitrogen and changing of refrigerant gas shall be quoted in this item only.

Supply only of nitrogen gas cylinder for leak testing of central A/C plants consisting of 3x50 TR complete all as specified and directed.

Supply only of refrigerant gas (R-22 ) monochlorodifloro methane confirming to IS – 5160 in central Air conditioning plant 3x 50 TR complete all as specified and directed. Make : Mafran/Feron. (Note:- Empty cylinder shall be issued to the contractor by the department.).

Supply & fix in repair of existing two way solenoid valve as per complete all as specified and directed.

Supply, fix and replacement of Hepa filter efficiency 99.97% down to 3 micron size as per sample of nearest size :-

(a) 432 x 534 x 150 mm

(b) 432 x 458 x 150 mm

(c) 445 x 445 x 150 mm

(d) 420 x 533 x 150 mm

(e) 420 x 420 x 150 mm

Supply & fix in repair of Brass Jali for ‘Y’ strainer as per existing in cooling Tower complete all as specified and directed by Engr-in-Charge.

Supply & fix in repair of Heater 3000 Watts for 50 TR AC Plant as per sample complete all as specified and directed. Make :- DASPASS or equivalent as approved by GE.

Supply and fix in repair of expansion valve suitable for 50 TR central AC Plant as per existing complete all as specified and directed. Make :- Sporlon/cori/Resistoflex.

M&L for disconnection/dismantling of electric motor 3 Phase, 415 Volt of capacity 5 HP to 10 HP from installation & transporting to workshop for rewinding , taking out old unserviceable burnt winding and rewinding the same with super enamelled copper wire 'H' Class of same size to get the same output of motor including material such as varnish, sleeves, leothariod paper etc and refixing the same in position with proper alignment, balancing and testing complete all as specified and directed

M&L for disconnection/dismantling of electric motor 3 Phase, 415 Volt of capacity 50 HP to 65 HP from installation & transporting to workshop for rewinding , taking out old unserviceable burnt winding and rewinding the same with super enamelled copper wire 'H' Class of same size to get the same output of motor including material such as varnish, sleeves, leothariod paper etc and refixing the same in position with proper alignment, balancing and testing complete all as specified and directed

Supply and fix in replacement the following items :-

(a) Contactor kit for ML – 1.5. Make :- L & T/ Siemens/ Schneider/ABB

(b) Contactor kit for ML – 2.0 Make :- L & T/ Siemens/ Schneider/ABB

(c) contactor coil for ML-1.5 . Make :- L & T/ Siemens/ Schneider/ABB

(d) contactor coil for ML-2.0 Make :- L & T/ Siemens/ Schneider/ABB

(e) Contactor 3 TF 46, 440 Volts of capacity 63A. Make :- L & T/ Siemens/ Schneider/ABB

(f) Auxiliary contract for 3TF 46 Make :- L & T/ Siemens/ Schneider/ABB

(g) Contactor 3TF 34,220V 3 Pole.Make :- L & T/ Siemens/ Schneider/ABB

(h) Auxiliary contact for 3 TF 34, Make :- L & T/ Siemens/ Schneider/ABB

(i) Suction pressure Transducer

(j) Discharge pressure Transducer

(k) Oil pressure Transducer

(l) Single phase preventor as per sample.

(m) Snap action switch rating 15 Amp 250V Make – Indfos/ Schneider/ Siemens/ L&T.

Supply & Fixing of MPD suitable for voltas compressor model WC DR – 050 PMST including electric connection complete all as specified and directed.

Supply and fix in repair of VPD suitable for voltas compressor model 374 KKS - 41 rande 415V AC + 1-10% including electric connection complete all as specified and directed.

S/F in repair of pressure valve suitable for condensor unit for 50 TR AC plant as per sample complete all as specified and directed.

S/F in repair of Power contactor 3 pole,70A, 415 Volts complete all as specified and directed. Make;- Seimens/L&T/C&S or equivalent as approved by GE.

M & L for cleaning of air duct through authorised company to remove dust, bacteria, mould spores and other foreign body by using HEPA filter vacuum unit and high pressure steam as required. Robotic video camera must be used for inspection, cleaning and sanitizing purpose. Access panels shall be fitted if required to gain access to clean the damper etc and shall be refitted with screws and sealant, after thorough cleaning the system should be properly sanitized by using an EPA resister bacteriastat. Firm shall also submit a proof of cleaning of duct by using robotic camera and the video film copied on CD in duplicate before and after cleaning. One copy of CD will be kept on record of Engineer-in-charge and other copy shall be submitted during payment of RAR as well as final bill. No payment shall be made in absence of video proof and contractor's quoted rate shall be inclusive of the same. Make of authorised company : Blue star/Voltas/ Carrier. (Note:- The contractor should submit the report of the duct cleaning and physical condition by the authorised company).

M&L for repair/maintenance of cooling tower of capacity 100 TR central AC plant by removing the fins completely and thoroughly descaling the surface including finding the leakage of the cooling tower, repairing, water proofing with fiberglass, resin, polyurethane, complete (FRP) coating including welding/brazing supporting angle irons etc as to be carried out before preparing for painting the inner and outer surface by 02 x coat of red oxide primer and 01x coat of water proof/rust free exterior quality paint incl painting of all GI Pipe of any size complete all as specified and directed. (Note: Cooler tower fins shall be measured and paid separately).

S&F PVC fins of existing size for cooling tower complete all as specified and directed.

S&F CI Butter Fly valve of size 80mm dia as per existing complete all as specified and directed.

S&F CI butter fly valve of 125 mm dia as per existing complete all as specified and directed.

M & L for replacement of GI sheet with C & SS rectangular/square duct made out of 'L' shaped hollow profile, duly factory boxed, incl all accessories such as corner, cleat,carriage bolt, gasket and appropriate sealant on longutudinal joints etc complete of size 20 Guage including removal of existing insulation materials of repair portion and including plaster work matching with existing complete all as specified and directed. (Note:- Duct shall be fabricated from galvanised steel sheet zinc coated having zinc coating 120gm/sqm total on both sides conforming to IS:277-2003)

Supply and fix in repair of water pressure switch including checking of electrical connection complete all as specified and directed. Make : Indfoss/Danfoss/ Siemens.

Supply and fix in repairs of anti freeze thermostat including making electrical connection complete all as specified and directed. Make : Indfoss/Danfoss/Siemens.

Dismantling existing control & power wiring of LT starter Panel of Air conditioning plants capcity 50 TR & rewiring with PVC insulated copper wire existing size of control & power wiring for proper sequential working of contactors with delay timer, over load relay of compressor, water pumps, cooling tower motor,AHU motor, control mccb etc. by making proper connections to contactors, relays, fuses, switches, voltmeter,ammter incl Repair/ replacement of damaged hinges of each compartment of panel, including LT Panel interlocking to all star, delta,starter panel and existing bus bars and cleaning with CTC applying with becktol red solution, providing bus bar insulation and refixing with new nuts, bolts, washers etc testing commissioning complete all as specified and directed. Note:- (i) Cost of electric cable, lugs & connectors is included in above cost. (ii) The quoted rate include the cost of painting of the panel with two coats of synthetic enamel over a coat of red oxide primer paints complete all as up to satisfaction of Engr-in-charge. (iii) Cost of replacement of MCCB's, Contractors, relays not included in the scope of work. (iv) Addition / Alteration/ Welding / fabrication work for fixing of new component is included in the quoted rate

Material and Labour in replacement of 20mm bore GI pipe medium grade incl all fitting and acessories complete all as specified and directed.

Taking down carefully and overhauling of Monoblock pump set of capacity 5 HP to 10 HP by disconnecting the pump from foundation and pipe line, dismantling of shaft from the pump, replacing the unserviceable wornout bearing, gland packing, seal , bushing and bearing and assembling after repairs,including complete testing all as specified and directed.

BRIGHT TRADRES

LARSEN AIR CONDITIONING & REFRIGERATION