Renovation/ repair of HVAC system (Precision, hyper units of various capacity) for switching system at T.E./ RSU Bldg., under EE(E) BCP, MTNL, New Delhi

Amount

Dismantling of old unserviceable ductable AC unit indoor unit and outdoor unit and its electrical connections , cabling, MS Frame, copper piping etc including lifting of units from one location in the building and shifting them to desired location within the building decided by engineer-in-charge 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 4.0 TR to 11.0 TR Ductable/Package AC unit complete as required.

Providing and making drain arrangement for AC units with following pipes i/c Tee, Union, Socket & elbow etc as required. a) 25 mm dia medium class PVC pipe

b) 38 mm dia medium class PVC pipe

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 & installation 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) 1/4"

Supplying and fixing of PVC insulated PVC sheathed/XLPE insulated copper conductor cables of 1.1KV grade 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 6 Sq. mm copper armoured cable

b) 4 x 10 Sq. mm copper armoured cable

c) 3 x 1.5 Sq.mm copper conductor flexible cable

d) 4 x 2.5 Sq.mm copper conductor flexible cable

e) 18C x 2.5 Sq.mm copper armoured 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 cable-tray, width-size above 250mm to 500mm, made out with M.S. Slotted angle & square pipe/factory fabricated MS perforated cable tray i/c nut bolt, screw, M.S. / GI threaded suspenders, fasteners etc. as reqd.

Supply & Installation 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) 3.75 TR to 5.5TR scroll/hermetic sealed reciprocating compressor

(b) 2.0TR/2.5TR scroll/hermetic sealed reciprocating compressor

Installation of old IDU including necessary suspenders & Outdoor units of 4.0 TR /5.5TR/7.5 TR Ductable AC unit on existing MS Platform complete as required.

Installation of old IDU including necessary suspenders & Outdoor units of 8.5 TR / 11.0 TR Ductable AC unit on existing MS Platform complete as required.

Supplying, Laying & fixing of 8 SWG GI earthing wire on the existing surface/recess for loop earthing with main power cable complete as required.

Providing and fabricating MS structure work/ MS platform/duct supports/40x40x5mm angle iron/steel wire-mesh etc. as per site requirement i/n cutting, welding, painting with redoxide and then 2 coats of enamel oil paint of approved colour etc. complete as reqd.

Supply and charging R-22/R-410A/R-407C refrigerant for top-up of refrigerant in the AC units complete as required.

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

Dismantling of old defective condenser coil with the help of brazing set and replacement with new 5.0TR/5.5TR condenser coil for existing Package AC/Ductable AC unit complete as required.

Dismantling of old defective condenser coil with the help of brazing set and replacement with new 7.5TR/8.5TR condenser coil for existing package AC/Ductable AC unit complete as required. (area to be measure in Sqft.)

Dismantling of old defective evaporator coil with the help of brazing set and replacement with new 7.5TR/8.5TR/ 11 TR evaporator coil for existing Package AC/Ductable AC unit complete as required. (area to be measure in Sqft.)

Supplying and fixing of synthetic fibre media washable filters with frame ( Efficiency 90% down to 20 microns ) for 5.0 TR to 11.0 TR )

AC guard CP-corrosion, prevention coating for brazing joints, U bend, interconnecting copper piping of Outdoor and Indoor units.

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.

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)

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.

Supply, installation, testing & commissioning of following accessories for different type of AC units complete as required: (a) Condenser fan motor for package AC units (4.0TR or above)

(b) Condenser fan motor for ductable AC units (4.0 TR 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

(h) VSP D1 ( Minilec ) 415 V relay of compressor/blower for package / Ductable 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

(n) Remote for Ductable AC units ( 4.00 Tr to 11.0 TR)

(o) Expansion valve for 5.5 TR

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.

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.

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

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

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

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.

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.

Providing and fixing of modutrol motor complete with DC transformer electrical wiring and making connection inlocking with package units complete as reqd.

Less : Credit for dismantled material shall be the property of contractor.

M/s Merco Airconditioning Refrigeration Engineers (BID ID -3197336)