PERIODICAL SERVICING MAINTENANCE AND REPAIRS TO AIR HANDLING UNITS OF VARIOUS CENTRAL AIR CONDITIONING PLANTS AND CERTAIN OTHER WORKS AT NAVAL DOCKYARD, VISAKHAPATNAM UNDER GE (I) DM VISAKHAPATNAM.

Amount

Material and labour for cleaning of AHU duct grills, filters on monthly basis comprising of thoroughly cleaning by air blow with electric air blower and water jet dripping up the AHU complete all as specified and directed.

Material and labour for servicing of air handling units comprising of thoroughly cleaning of body and cooling coils by air blow with electric air blower and water jet dripping up the AHU, painting with one coat of synthetic enamel paint on internal and external surface to the body and alignment of the blower and shaft greasing the pedestal bearing adjustment of `V' belts tension including replacement of trunking canvas with zip refixing the belt guards in position all as specified and directed.

Material and labour for cleaning of AHU room on monthly basis comprising of inside wall, ceiling, floor with suitable brush/broom/wiper, removing wild vegitation inside the building complete all as specified and directed.

Supply and fix belt driven set with pulleys, bearings etc suitable upto 30 HP motor blower including taking down the old unserviceable belt driven set all as specified and directed.

Supply and fix filter section consists of profiler with 10 microns of particles 90% efficiency nylon mesh including taking down the old unserviceable filter section all as specified and directed.

Supply, fabricate and erect MS supports (such as channel, angle, flats etc.) to supply/return air duct including painting to steel surfaces with two coats of synthetic enamel paint over a coat of zinc chromate primer including dismantling existing corroded MS supports all as specified and directed

Material and labour for taking out damaged insulation portion of existing refrigerant line/chilled water pipe line of following sizes, and cleaning the pipe and insulation with thermocole pipe section TF quality water proof around pipe and fixed with GI wire mesh, plastering with cement mortar 1:4, 15 mm thick, finished smooth and duly painted with two coats of cement based paint and removing dismantled materials from Dockyard premises all as specified and directed.

80 mm bore

100mm bore

125mm bore

150mm bore

Supply and charging of R-22 gas all as directed. Make:- Refron 22/Floron 22/Mafron 22

Material and labour for disconnecting, taking out the blower motors of following capactities from air handling units, tranportation to workshop and removing the existing winding and rewinding with new super enameled copper wire of same gauge and same number of turns after thorough cleaning of stator body and rotor applying insulating varnish, drying up by heating for improving ohmic valve, reassembling the motor by replacement of both end bearings, including painting with one coat of synthetic enamel paint, reinstalling on its original position connecting up, testing all as specified and directed :-

Upto 15 HP

Upto 20 HP

Upto 25 HP

Material and labour for repairs and overhauling the blower motors of following capacities by disconnecting and taking out, replacement of worn out bush/ball bearing, lugs, studs, bolts etc., re-installing in it's original position including painting the motor body with one coat of synthetic enamel paint, connecting up, testing all as specified and directed.

Upto 15 HP

Upto 20 HP

Upto 25 HP

Material and labour for replacement of AHU bottom sheet including neccesary brazing/welding/tinkering work complete all as specified and directed. Note : Rates include GI sheet and bearings.

Material and labour for insulation with 10 mm thick open cell nitrile rubber insulation for duct acoutsic insulation complete all as specified and directed.

Material and labour for insulation with 12 mm thick closed cell nitrile rubber covered with aluminum foil for thermal insulation to total ducting complete all as specified and directed.

Supply, fabricate and erection of supply and return air ducts of any size and shapes made out of GI sheet of 0.71mm thick including supports,pipes, jointing, reviting, GI nuts, bolts and washers as required at site including taking down the old corroded duct of any size on wall/roof any height complete all as specified and directed.

Material and labour for complete checking, servicing/ rectification of electrical circuits for all units and control wiring showing phase sequence with proper lugging of AC plant control panel including replacement of fused indication lamps with new ones, cleaning of all power contacts, rectification of minor defects in Ammeters and Voltmeters including necessary modification/rewiring etc., testing and commissioning and painting the outer body all as specified and directed. Note :- Material such as indication lamp, ammeter, voltmeter will be measured and paid separately. Note :- Items apart from supply only which are required in site are deemed to be included in the quoted rate.Material such as indication lamp, ammeter, voltmeter will be measured and paid separately as supply only.Any other items equired to make the unit functional is deemed to be included in the quoted rate.

Contractor has to deploy manpower at the worksite to attend the breakdown calls received from representatives during two shifts throughout the week including sundays & holidays and on emergencies in third shift shall be attended ,preventive maintenance for the entire duration of contract.It is the contractors responsibility to make the unit functional and sufficient stock of spares shall be maintained to rectify the breakdown within scheduled period.Cleaning,stacking,sorting,handling and upkeeping of maintenance shall be carried out by contractor.

Supply only MCCB of 250 Amps, 4 pole, 36 KA, AC supply 50Hz, 415 V complete all as specified and directed. Make - Indo Asian/Havells/L&T

Supply only MCCB of 160 Amps, 4 pole, 36 KA, AC supply 50Hz, 415 V complete all as specified and directed. Make - Indo Asian/Havells/L&T

Supply only MCCB of 100 Amps, 4 pole, 36 KA, AC supply 50Hz, 415 V complete all as specified and directed. Make - Indo Asian/Havells/L&T

Supply MCCB upto 63 Amps, 4 pole, 36 KA, AC supply 50Hz, 415 V complete all as specified and directed. Make - Indo Asian/Havells/L&T

Supply Power contactor 32 Amps, 3 pole, 415 V complete all as specified and directed. Make - Indo Asian/Havells/L&T/ABB/ Schneider

Material & labour for PCC (1:2:4), type B1 (using 20 mm graded stone aggregate) as in foundation filling, repairs to damaged floors including necessary form work and finishing the exposed surfaces of concrete fair and even complete all as specified and directed.

M&L for brick work with subclass `B' bricks, straight or curved on plan exc 6m mean radius, built in 1:6 cement morter complete all as specified and directed.

M&L for rendering 10mm thick plaster on fair faces of brick work or concrete surfaces complete all as specified and directed.

ANAND ENTERPRISES AND ENGINEERS

SRIVALLI ENGINEERS

SAI ENGINEERING WORKS

REAL ENGINEERING WORKS

P VENKATA RAO