Associated work for AC units for various TE Bldgs. / RSUs under EE (E-W ) Hari Nagar, MTNL, New Delhi

Electrical Items :

Providing and installing following size soft/hard copper pipe including cutting, bending, jointing, brazing etc as reqd. for hot and liquid refrigerant line complete as required as per site requirement. a) 7/8"

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

Pressure testing with nitrogen, vaccumizing & checking of leakage, commissioning of existing package/ ductable/ sensicool/ tower/ cassette/ split/ window AC unit etc. complete as required. a) 1.5 TR / 2.0 TR (nominal capacity) AC unit.

b) 4.0 TR / 5.0 TR / 5.5 TR (nominal capacity) AC unit.(each circuit)

c) 7.0 TR / 7.5 TR (nominal capacity) AC unit (each Circuit).

d) 8.75 TR / 9.0 TR (nominal capacity) AC unit (each Circuit).

e) 11.0 TR (nominal capacity) AC unit (each Circuit).

Charging of R-22 refrigerant gas in the existing package/ ductable/ sensicool/ tower/ cassette/ split/ window AC unit after purging the air, testing and commissioning the units etc. complete as reqd. a) 1.5 TR / 2.0 TR (nominal capacity) AC unit.

b) 4.0 TR / 5.0 TR / 5.5 TR (nominal capacity) AC unit.(each circuit)

c) 7.0 TR / 7.5 TR (nominal capacity) AC unit (each Circuit).

d)8.75 TR / 9.0 TR (nominal capacity) AC unit (each Circuit).

e) 11.0 TR (nominal capacity) AC unit (each Circuit).

Supplying, laying and fixing of following sizes pvc sheathed copper conductor armoured / unarmoured cable on the existing wall / ceiling for power / control cable etc making connections and testing etc complete as reqd.(a)4 x 10 sq. mm copper armoured cable.

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

c) 4 x 1.5 Sq. mm copper armoured cable.

d) 3 x 2.5 Sq. mm copper armoured cable.

e) 17 core unarmoured cable.

f) 3 core 2.5 Sq.mm flexible copper cable.

Supplying and fixing new evaporator coils for following AC unit including dismantling the faulty existing evaporator coil and making proper size copper pipe connection, brazing at joints etc as reqd. a)Evaporator coil for 11.0 TR (nominal capacity) AC unit.

Supplying and fixing following new condenser coils including dismantling the existing condensor coil and making proper size copper pipe connection, brazing at joints etc as reqd. a) Condenser coil for 4 TR / 5 TR / 5.5 TR (nominal capacity) AC unit.

Providing & making drain arrangement for AC units with following pipe i/c Tee, Union, Socket & Elbow etc as required. a) 40 mm dia CPVC pipe.

b) 25 mm dia CPVC pipe.

Providing and making MS structure work made of MS rods, hooks,nuts etc. for indoor AC units i/c cutting, welding, painting etc. complete as reqd.

Supplying & making M. S. Structure work / frame made of MS angle iron for outdoor AC unit /condensor i/c cutting, welding, painting etc. complete as reqd.

Pdg. & fixing of electrical/switchgears used for AC plant/centifugal fan/air washer & other works complete as reqd. a) 63amp TPN SFU/MCCB/MCB.

b) 100amp TP MCCB

Dismentalling of old package/ductable indoor and outdoor AC unit including its electrical /mechanical connection,old GI duct/insulation complete as reqd and shifting it to the desired location as given by Engineer-In-Charge.

Shifting including dismantling of 1.5 TR / 2 TR / 2.5 TR AC units i/c disconnecting the connection with the help of brazing, removing drain piping, disconnecting the electrical connection and then removing the complete unit (indoor & outdoor), loading / unloading and shifting the unit within the building etc complete as reqd.

Minor civil work such as cutting, widening and opening the floor/wall and other civil work for installing refrigerant piping/drain piping/ ducting/electrical cabling for each cutout including finishing the same complete as reqd.

Lifting of Ductable A.C unit from ground floor to the floor i e upto the site where AC to be installed with the help of heavy labour & chain pully block complete as reqd.

Loading, unloading & Transportation of old Ductable AC Indoor Unit and outdoor unit from one Location to another location within Delhi region complete as required.

Less credit for dismantled material and dismantled material shall be the property of contractor.

M/s Merco Airconditioning Refrigeration Engineers