Modification/ Extension/ Renovation of HVAC system for proposed DOT Area (LSA) at 5th floor JLN marg, MTNL,ND

Amount

Repairing. of energy efficient Heat-Exchanger fan complete with blades, hub, shaft etc. capable for free air-delivery of 20000CFM having electric motor of 3.5 HP, F Class insulation, IP 66 protection suitable for 24 hrs. continuous outdoor-duty operation on 415V +/- 5%, 50Hz, 3 phase a.c. supply including dismantling the existing faulty/burnt-out irheat-exchanger fan with all accessories & motor and fixing it after repairing works i/c testing commissioning etc as reqd .

Refilling/Top up of polyester oil (POE oil) for compressor of 120TR /172TR AC chiller with removing covers, gaskets and emptying of existing oil etc. complete as required. (Make & Grade: Bitzer BSE 32)

Extension of Central AC plant (2 x178 TR /2 X 120 TR ) duct for proposed room/chamber by providing GSS ducting for supply of air fabricated out of 24 gauge sheet rectangular type above the false ceiling .The duct shall be Prefabricated or site constructed for bends,louvers etc complete as reqd including providing & fixing thermal insulation of 10 mm thick nitrile/50 mm thick fibre glass duly wrapped in poly ethylene sheet for thermal insulation with hardwares on GSS ducting and duct shall be hanged/mounted by MS hangers of suitable size above the false ceiling etc 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)SAG/RAG with damper (up to 4 sqft)

P/F Canvass connection with fire resistance cloth complete as reqd.

Making inter connections of GSS duct from round to square sizes.

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)

Pressure testing with nitrogen, pressure standing for at least 8 hr., vacuuming & commissioning with appropriate refrigerant for following A C units complete as reqd. 5 TR/5.5TR

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

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) 10 x 4 Sq. mm copper armoured cable.

b) 6 x 1.5 Sqmm

Providing & making drain arrangement for AC units with following pipe i/c Tee, Union, Socket & Elbow etc as required. A) 25 mm Dia