Essential work for AC units for various TE Bldg/ different sites under EE(E)BCP, MTNL New Delhi

Amount

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.

Replacement of faulty compressor with the factory repaired compressor i/c dismantling of the faulty one from site and re-fixing the new one etc as reqd. a) 1.5 TR.

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) 2.5 TR / 3.0 TR (nominal capacity) AC unit.

c) 4.0 TR / 5.0TR / 5.5 TR (nominal capacity) AC unit.

d) 8.0 TR / 8.5 TR / 9.0 TR (nominal capacity) AC unit (each Circuit).

e) 11.0 TR / 12 TR (nominal capacity) AC unit (each Circuit).

f) 7.0 TR / 7.5 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) 2.5 TR / 3.0 TR (nominal capacity) AC unit.

c) 4.0 TR / 5.0TR / 5.5 TR (nominal capacity) AC unit.

d) 8.0 TR / 8.5 TR / 9.0 TR (nominal capacity) AC unit (each Circuit).

e) 11.0 TR / 12 TR (nominal capacity) AC unit (each Circuit).

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

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 1.5 TR / 2 TR (nominal capacity) AC unit.

b) Evaporator coil for 2.5 TR / 3.0 TR (nominal capacity) AC unit.

c) Evaporator coil for 4 TR / 5 TR / 5.5 TR (nominal capacity) AC unit.

d) Evaporator coil for 7.0 TR / 7.5 TR (nominal capacity) AC unit.

e) Evaporator coil for 8.0 TR / 8.5 TR / 9.0 TR (nominal capacity) AC unit.

f) Evaporator coil for 11.0 TR (nominal capacity) AC unit.

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 as per site location. 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 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 1.5 TR / 2 TR (nominal capacity) AC unit.

b) Condenser coil for 2.5 TR / 3.0 TR (nominal capacity) AC unit.

c) Condenser coil for 4 TR / 5 TR / 5.5 TR (nominal capacity) AC unit.

d) Condenser coil for 7.0 TR / 7.5 TR (nominal capacity) AC unit.

e) Condenser coil for 11.0 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 GI B class pipe.

b) 25 mm dia drain pipe.

Providing and making MS structure work such as MS platform/duct supports /tray supports/frame for indoor and outdoor AC units i/c cutting, welding, painting with redoxide and then enamel oil paint of approved color etc. complete as reqd. as per site location.

AC Guard CP-Corrosion, prevention coating for brazing joints, U bend, interconnecting copper piping of outdoor and indoor units.

Supplying & making M. S. Structure work for cond./ Duct supports/trey support/accoustic grid with following accessories i/c cutting, welding of the same etc as reqd. a) Pdg. & fixing MS frame (stand type) for outdoor A C unit complete as reqd.

b) Pdg. & fixing MS frame/suspender for indoor A C unit 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

SITC of indoor unit of following type split AC i/c dismantling of old unit and fixing of new unit with fittings etc as required. ( Make: Carrier/LG/Fedders Lloyd /SS ) a) 1.5 TR Split

b) 2.0TR Split

Replacement of the following defective / unserviceable faulty components of 1.5 TR / 2 TR AC units with the new ones complete as required as per the site location. a) Outdoor condenser motor.

b) Indoor unit motor.

c) Indoor blower.

d) Fan Blade.

e) Starting Capacitor (80-120 Mfd)

f) Running Capacitor (45-50 Mfd)

g) Capacitor (6/50Mfd)

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.e. disconnects 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.

SITC of Outdoor unit of following type Split AC i/c dismantling of old unit and fixing of new unit with fittings etc as required but without Compressor ( Make: Carrier/LG/Fedders Lloyd /SS ) a) 1.5 TR Split

b) 2.0 TR Split

Pdg. & fixing automatic Phase correction system for ductable A C unit which should work in such a way that as the series of phases changed from the 3 phase A C supply it will work and make the series phase correct so that the A C units operation does not effect i/c its wiring etc complete as reqd.

P/F PCB in the existing Ductable / Package AC units of 4/5/7.5 / 11.0 TR AC units i/c contactor and single phase preventor etc. complete as required.

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

M/s Merco Airconditioning Refrigeration Engineers