Enhancement of AC units including necessary accessories for Package/Ductable AC units under the jurisdiction of EE(E ) MTNL Delhi (SH Associated Work)

Amount

Supply & Instllation of compressor 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

(b) 2.0TR/2.5TR 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) 6.4mm dia (OD)

(b) 12.7mm dia (OD)

(c.)15.86mm dia (OD)

(d)19.1mm dia (OD)

(e.)22.2mm 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

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

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

Supplying & laying of 3C x 2.5sqmm. Flexible copper wire on the existing wall / ceiling for Power / Control cable etc. as reqd.

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.) Width size above 150mm not exceeding 300mm.

b.) Width size above 300mm not exceeding 500mm.

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

Dismantling of old 5.5TR Ductable AC unit including indoor and outdoor unit, i/n its electrical connections , cabling, MS Frame, copper piping, old canvas and ducting connection & drain pipingdecided by engineer-in-charge complete as required.

Lifting of Indoor and Outdoor units of 5.5TR Ductable AC from one location in the building and Shifting it to the desired location on desired floor in the same building complete as required.

Installation of old IDU including necessary suspenders & Outdoor units of 5.5TR Ductable AC unit on existing MS Platform complete as required.

S/I/T/C of ball bearing or gunmetal bush including dismantling of motor & rewinding of existing condenser fan motor (3 phase/single phase) & refixing the same for following type of AC units complete as required: (a) Package AC units (5TR or above)

(b) Ductable AC units (5TR or above)

Providing and fixing following type of filter having 85% efficiency down to 20 microns suitable to fit in the ductable unit/ package unit/ duct/ plenum at the supply air/ return air path complete as required: a.) Return air filter for AC unit

Supply, installation, testing & commissioning of following accessories for different type of AC units complete as required: (a) Condenser fan motor for package AC units (5.0TR or above)

(b) Condenser fan motor for ductable AC units (5.0TR or above)

(c.) Condenser fan blade for package/ductable AC units (5TR or above)

(d) V-belt for package AC units

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

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

(g) S/I/T/C of blower shaft for Package AC units complete as required.

(h) Overload relay of compressor/blower for package AC units

(i) LP Switch/HP Switch for package/ductable AC units

(j) Package AC unit controller card/PCB

(k)Single Phase preventer for Package AC/Ductable AC units

(l) Blower for Indoor unit of Package AC/Ductable AC units

(m) Digital ampere meter for Package AC/Ductable 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.

Supply & installation of thermostatic expansion valve for package/ductable AC units of 5tr to 7.5tr circuit 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.

Supply, Installation, Testing & Commissioning of MPD for package AC/ Ductable AC units including making electrical connnections complete as required

Supply & Installation of new condenser coil for existing Package/Ductable AC unit including dismantling of old defective condenser coil with the help of brazing set and deposit the defective coil in the store of same building complete as required. (a) 5.5TR/7.5TR/8.5TR Condenser Coil

(b) 3.0TR/4.0TR Condenser Coil

Supply & Installation of new evaporator coil for 4.0TR/5.5TR existing Package/Ductable AC unit including dismantling of old defective Evaporator coil with the help of brazing set and deposit the defective coil in the store of same building complete as required.

Supply & Installation of new evaporator coil for 7.5TR/8.5TR existing Package/Ductable AC unit including dismantling of old defective Evaporator coil with the help of brazing set and deposit the defective coil in the store of same building complete as required.

Supply & Installation of new evaporator coil for 10TR/11TR existing Package/Ductable AC unit including dismantling of old defective Evaporator coil with the help of brazing set 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 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

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

Fixing of fireproof flexible double canvas connection with the package unit air outlet including gaskets, adhesive, nuts & bolts etc. complete as required.

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 .

Providing and fixing of supply air/return air powder coated Aluminium grill / diffuser of suitable size complete as required(Size upto 4sqft.).

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

S/I/T/C of brass safety valve of suitable sizes for package AC units of 9TR/10TR complete as required

S/I/T/C of capacitor of suitable rating for condenser fan motor and compressor pckage/ductable AC un its i/c making connections etc. complete as required

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).

Supply & installation of Pillow type ball bearings 2 nos. for blower shaft and dismantling of old ball bearings of package type AC unit complete as required.

Dismantling of old faulty display and Supply and fixing of new Indoor Unit Display for Package AC units complete as required.

Dismantling of old working compressor from non-working package/ductable AC unit and re-fixing of the same compressor to other working unit including additonal oil, making connections within same location 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.

Dismantling of old ducting and lifting & shifting the material in same building as decided by the engineer-in-charge complete as required.

Dismantling of Old dampers and lifting and shifting the dampers to desired location inside the building as decided by the engineer-in-charge complete as required.

Dismantling of old 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 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.

Dismantling of old 8.5TR Package AC unit including indoor and outdoor unit, i/n its electrical connections , cabling, MS Frame, copper piping, old canvas and ducting connection & drain pipingdecided by engineer-in-charge complete as required.

Lifting of Indoor and Outdoor units of 8.5TR 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 Condenser of 4.0TR & Above units of Package AC/Ductable AC from one Location to another location within Delhi region complete as required.

Loading, unloading & Transportation of old Package AC/Ductable AC Indoor 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.

Making PCC foundation of package type AC units I/C plastering etc. complete as reqd.

Providing and fixing of 9mm thick cross linked polyethylene insulation for copper piping in order to protect it from air borne impurities complete as reqd. as per site location.

Providing and fixing of 6mm thick cross linked polyethylene insulation for drain piping 25mm in order to protect it from air borne impurities complete as reqd. as per site location.

Providing and fixing of insulation on ducting with 6mm thick nitrile rubber closed cell fire redundant insulation etc. complete as required.

Providing and making MS Angle frame using 25mm x 25mm x 5mm thick MS angle for the support of PCC Foundation.

Repairing of old electrical panel including replacing of old faulty accessories complete as required at site.

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.

AC Guard CP-Corrosion prevention coating for brazing joints, U bends, interconnecting copper piping of indoor and outdoor ac units (per job per unit)

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

Providing MS wiremess with enamel paint and redoxide complete as required.

Dismantling of old 1TR/1.5TR/2.0TR Window AC unit, i/n its electrical/mechanical connections complete as required. Lifting of unit from one location and Shifting it to the desired floor in the same building.

Dismantling of old 1TR/1.5TR/2.0TR Hi-wall type split AC indoor and outdoor AC units, i/n its electrical/mechanical connections complete as required. Lifting of unit from one location and Shifting it to the desired floor in the same building.

Installation of old IDU & ODUs of Hi-wall type split AC unit complete as required.

Supply and installation of floor mounted/wall mounted MS Stand for Outdoor unit of 1.0TR/1.5TR/2.0TR Split AC complete as required.

Loading, unloading, Lifting, shifting & Transportation of old 1TR/1.5TR/2.0TR Window AC/Hi-wall type split AC indoor and outdoor AC units from one building to another building within Delhi area complete as required.

M/s Merco Airconditioning Refrigeration Engineers