Essential work for AC units at various Switch Rooms/RSUs /various sites under EE(E)KBN,MTNL,ND

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) 5/8"

Pdg & fixing kini foam 3mm thick for thermal insulation of copper pipping in order to protect it from airborn impurities i/c removal of old insulation etc. complete as reqd

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) 3 x 2.5 Sq. mm copper armoured cable.

b) 17 core copper unarmoured cable.

c) 4x 10 Sq. mm copper armoured cable.

d) 4 x4Sq. mm copper armoured 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 4 TR / 5 TR / 5.5 TR (nominal capacity) AC unit.

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

d) Condenser coil for 8.5 TR / 8.75 TR/9TR (nominal capacity) AC unit.

e) Condenser coil for 11.0 TR (nominal capacity) AC unit.

Pressure testing with nitrogen, pressure standing for at least 8 hr., vaccumzing & commissioning with appropriate refrigerant for following A C units complete as reqd. . a) 1.5 TR / 2.0 TR (nominal capacity) AC unit.

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

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

d) 8.5TR / 8.75 TR /9TR(nominal capacity) AC unit (each Circuit).

e) 11.0 TR / 12 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 7.0 TR / 7.5 TR (nominal capacity) AC unit.

c) Evaporator coil for 8.5 TR/8.75TR/9TR (nominal capacity) AC unit.

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

e) Evaporator coil for 4 TR /5TR /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 medium class PVC pipe.

b) 25 mm diamedium class PVC pipe.

Fabricating & installing of following size copper piping/cable tray made out with M.S slotted angle/factory fabricated tray i/c nut bolt, screw, etc as reqd. width size not exceeding 150mm

Dismantling of old ductable units(5 TR/5.5TR/7.5TR/8.5TR/8.75TR/11TR) with the help of chain pully block & heavy labour etc as required

Lifting & shifting of A.C units with the help of heavy labour & chain pully block from one site to another site where the A C plant room/required area is situated complete as reqd. (5 TR/5.5TR/7.5TR/8.5TR/8.75TR/11TR)

Refixing of A.C units with the help of heavy labour & chain pully block i/c providing Suitable size of suspender rod /MS support as per requirement etc as reqd (5 TR/5.5TR/7.5TR/8.5TR/8.75TR/11TR)

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.

P/F PCB in the existing AC units of 1.5 TR to 5 TR AC units i/c connection, testing etc. complete as required.

Supply & fixing of G. I. sheet metal ducting for air supply,mixing , air distribution , complete with following thickness (gauge) i/c nut bolts, gaskets, suspenders, supports etc. as required. a) 24 gauge G. I. Sheet

b) Canvass connection with fire resistance cloth complete as reqd.

Providing & fixing of following size of powder coated Aluminium construction supply/return air grill or Diffuser with 60% free area etc. complete as reqd. a) Return air grill / Diffuser (Size:As per requirement, area :less than or equal to 4 sqft.)

b) Pdg. & fixing of Supply air grill for ductable indoor unit of suitable size complete as reqd. (Size upto 4 Sqft.)

P/F Volume control damper for package indoor / ductable indoor units/duct etc as reqd

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

MEP Engineering and Contracting Co.