Essential work of AC units installed at various T.E Bldg RSUs various sites under AE(E)LR,MTNL,New Delhi.

Amount

Dismantling of old compressor and replacing with a new compressor including installation, of following type and rating suitable to operate on single phase 220V+/- 10%, 50Hz or three phase 440V+/- 10%, 50Hz AC supply for package/ductable/multi split/split/window AC units complete as required. a) 4.0TR to 5.5TR scroll/hermetic sealed reciprocating compressor.

Supply & installation including nitrogen testing of following nominal sizes of soft drawn/hard drawn copper refrigerant piping for air-conditioning system, complete with fittings, with suitable supports, jointing/brazing including all accessories and dismantling of defective copper pipe and deposit the defective material to desired location in same building as per specifications etc. as required. a) 1/4" dia (OD).

b) 3/8" dia (OD).

c) 1/2" dia (OD).

d) 5/8" dia (OD).

e) 6/8" dia (OD).

f) 7/8" dia (OD).

Supplying and fixing of PVC insulated PVC sheathed copper conductor cables of following sizes on the existing M.S. trays/walls with saddles, screws etc and end terminations of cables with glands etc. as required. a) 4 x 10 sq. mm copper armoured cable.

b) 4 x 6 Sq. mm copper armoured cable.

c) 3 x 2.5 Sq.mm copper conductor flexible cable.

d) 4 x 1.5 Sq.mm copper conductor flexible cable.

e) 2 x 1.5 Sq.mm. copper conductor flexible cable.

Fabricating & installing of following size copper piping tray made out with M.S. Slotted angle & squire pipe/factory fabricated MS perforated cable tray i/c nut bolt, screw, etc. as reqd. a) 150mm wide.

b) 300mm wide.

c) 450mm wide.

Providing & making uPVC/cPVC drain arrangement for AC units with following pipe sizes i/c Tee, union socket & elbow etc as reqd. a) 25mm Dia. Drain pipe.

b) 32mm Dia. Drain pipe.

c) 38mm Dia. Drain pipe.

Providing and fixing of G.I. drain pipe of 38mm dia. Upto 2 mtrs. length for each Package AC unit including GI fittings and other accessories and making drain connection with the help of flexible PVC pipe of upto 1.5mtrs length complete as required.

Supply, installation, testing & commissioning of following accessories for different type of AC units complete as required. a) Condenser fan blade for package/ductable AC units (5TR or above).

b) V-belt for package AC units.

c) Dryer for package / ductable AC units (5TR to 8.5TR).

d) Contactors for compressor/blower (upto 25amps) for package AC units including electrical connections.

e) Overload relay of compressor/blower for package AC units.

f) LP Switch for package AC units.

g) HP Switch for package AC units.

Supplying, Laying & fixing of 8 SWG GI earthing wire on the existing surface/recess for loop earthing with main power cable complete as required.

S/I/T/C of 415V, 3-pole/4-pole MCB ( 10Amps. To 63Apms.) for package/ductable AC units including electrical connection complete as required.

S/I/T/C of 3TPN MCCB 63Apms.-100Amps. For electrical panel for AC units including electrical connection complete as required.

Dismantling and rewinding of old existing condenser fan motor including supply & fixing of ball bearing or gunmetal bush (3 phase/single phase) & refixing the same for following type of AC units complete as required. a) Package AC units (4TR or above).

Dismantling of old defective condenser coil with the help of brazing set and replacement with new 7.5TR/8.5TR condenser coil for existing Package AC/Ductable AC unit and deposit the defective coil in the store of same building complete as required.

Supplying of chemical for evaporator coil/condenser coil and chemical wash of evaporator coil/condenser coil of ductable/package AC units 8.5TR or above complete as required

Supply & fixing of site fabricated rectangular type G.I. sheet metal ducting i/c air mixing, air distribution system, complete thickness gauge i/c nut bolts & gasket etc. as required. a) 24 gauge G.I sheet.

b) 22 gauge G.I sheet.

c) 20 gauge G.I sheet.

Supply & fixing of fireproof flexible double canvas connection for package AC/Ductable AC unit with G.I. frame on both sides of canvas complete as reqd.

Supply of 24G site fabricated retangular type GI sheet metal ducting connection piece at the air outlet of Package AC/Ductable AC unit i/c flanges, nuts & bolts etc. complete as required (upto 3 sqmtrs.)

Supply of 24G site fabricated GI sheet metal ducting to Blank off old ducting etc. complete as required .

Dismantling of old damaged cowl set made of GI sheet and providing and fabricating new cowl set made out of 24G GI sheet metal along with necessary nut, bolts gasket etc. for DG sets i/c minor civil work complete as required.

Supply & fixing of following type of damper of size upto 5sq.ft. Made out of 18 gauge CRC/G I sheet used as fire damper, supply air damper or return air damper in main duct or branch duct or in return air path for package/ ductable AC indoor units as per site requirement. i/c nut bolt, gasket etc. as required. a.) Volume control damper.

Providing and fabricating MS structure work as per site requirement i/n cutting, welding, painting with redoxide and then 2 coats of enamel oil paint of approved color etc. complete as reqd. a) MS platform/duct supports/tray supports/40x40x5mm angle iron etc.

b) 8mm MS Rod.

Supply and charging R-22/R-410A/R-407C gas for top-up of refrigerant in the AC units complete as required.

Leakage testing & repairing of leaks with the help of brazing set followed by pressure testing of complete circuit with nitrogen gas, flushing of whole circuit, vacuumizing and commissioning of Ductable AC/Package AC unit complete as required ( each circuit).

Dismantling of old ducting including Aluminium cladding and lifting & shifting the material from 5th Floor to the lower basement in same building as decided by the engineer-in-charge complete as required (each unit)

Dismantling of Old dampers and lifting and shifting the dampers from 5th Floor to the lower basement in same building as decided by the engineer-in-charge complete as required.

Dismantling of old 7.5TR/8.5TR/10TR/11TR Ductable AC/ Package AC unit including indoor and outdoor unit, i/n its electrical connections , cabling etc.and lifting & shifting the old material on the same floor as decided by engineer-in-charge complete as required.

Lifting of Indoor and Outdoor units of 7.5TR/8.5TR/10TR/11TR ductable AC/ Package AC from one location in the building and Shifting it to the desired location on desired floor in the same building complete as required.

Loading, unloading & Transportation of old Package AC/Ductable AC Unit from one Location to another location within Delhi region complete as required.

Installation of IDU & ODUs of package AC on existing Foundation/MS Stand including old ducting connection piece, fixing of old damper & fixing of old flexible canvas connection complete as required.

Electrical repair work, set right the control wiring in exisiting panel of package/ductable AC unit including replacement of old contactors/relays from non-working machines to working package AC units complete as required.

Minor civil works such as making opening in brick wall/RCC walls/slabs for AC units for refrigerant piping, ducting, cabling as per site requirement, making good the same for sealing the opening after associate work complete as required.

Provision for color coding of copper piping with suitable color paints complete as required.

Supply and installation of wall accoustic insulation having grid size of 600mm wide x 1200mm Height made out of GI Framework, 50mm thick resin bonded fibre glass of density 24kg/cu.m, tissue paper & covered with 26G perforated Aluminium sheet fixed with the help of PVC sleeves, screw and other accessories complete as required at site.

Supply and fixing of The Access raised floor which shall be medium grade FS800H with point load of 363 KG/ over 25mm sq. and UDL of 1360 KG /M2 panels manufactured from steel with lightweight cementitious core in the size 600×600×32mm. The bottom of the panel shall be embossed in hemispherical shape to give strength and flexural rigidity on the exposed surface for lifetime protection and shall be zinc whisker free. The panel has to be placed on the pedestal made from all steel zinc plated construction . pedestal base plate 100 x 100 × 2mm pipe 300mm FFH x 1.2mm x 25mm dia top plate 75mmx75mm x 3.5mm assembly shall provide for easy adjustment of leveling and accurately align panels to ensure lateral restrain. Pedestal head shall be designed to avoid rattle or squeaks. The steel base plate of the pedestal shall be fixed on to the sub-floor with epoxy pedestal adhesive and /or mechanical fixing. An all-steel rectangular stringer 565mm x 20 x 30 x .8mm system having pre punched holes at both ends to ensure correct alignment with pedestal heads be applied for maximum stability. The panel shall be finished with high abrasion anti-static HPL in size 600×600×1mm with beading on all sides to provide protection of edges complete as required.

Supplying and fixing of 25mm thickness aluminum foil (on one side) closed cell Nitrile rubber (Class "O") insulation on floor/ceiling after applying suitable adhesive for Nitrile rubber complete as required at site. (Note: Before applying adhesive, cleaning & leveling of the floor/ceiling to be done without extra cost)

Dismantling of floor tiles and minor repairs of floor including sand, cement and other accessories complete as required at site.

Supply and Fabrication of 110mm thick brick wall with the help of bricks, sand, cement and other material complete as required.

Making of wall plaster 12mm thick using sand & cement complete as required.

M/s Merco Airconditioning Refrigeration Engineers