Replacement of Air Cooled Ductable Type AC Units in KSBS at IIT Delhi

Amount

SUB HEAD 1 (SITC)

Deinstallation of old existing Condenser unit, Evaporator unit (ductable type ceiling mounted), canvass connection, refrigerant pipes, electrical cables, all supports, switches / MCCBs, MS base frame and dismantling all accessories and removing from their position (2nd, 3rd floor and roof top as it is with the help of chain pulley or any other means) including mending good the damages, thorough cleaning of site, etc. as directed by the Engineer-in-charge. (N.B. : This is an occupied building / Lab. Utmost care shall have to be taken for least disturbances, arrangement of dust proof cover whatever required be provided. All time coordination with the building / Lab authority is essential, work may have to be undertaken beyond office hours also)

Supply Installation, Testing & Commissioning of air-cooled ductable type units suitable for cooling, having all hermetically sealed inverter type Scroll / rotary Compressor(s), with R 410 A Refrigerant, expansion valve, multi row copper cooling coil, internally grooved copper tubing with aluminium fins, multi safety devices for compressor protection like LP&HP protections vibration isolators, with suitable foundation etc. complete with Condenser and Evaporator units as required as per following specifications. The unit shall be suitable to work on 400 V ± 10%, 3 phase, 50 Hz ac power supply. The unit shall be filled with first charge of the refrigerant and ready for use as required. Necessary topping up of refrigerant, if required at site, shall have to be done. COP should not be less than 3.1 and IEER not less than 6.5. (Bidder should note that there is existing ducting system distributed throughout all rooms. Evaporator unit (indoor) shall be installed in place of the already existing indoor unit. Necessary modifications are to be done by the contractor) (Make: Hitachi / Blue Star / Carrier / Toshiba / Mitsubishi / O General / Daikin)

Rated capacity: 7.5 TR (Inverter Ductable)

Supply, Installation, testing and commissioning including vaccumisation and nitrogen testing of following nominal sizes of soft / hard drawn copper refrigerant piping for Ductable AC system, complete with fittings, joints wherever required, with adjustable with ring type hanger supports, jointing / brazing including accessories, insulated with XLPE class - O tubular insulation / woth Class-O closed cell elastomeric nitrile rubber tubular sleeves sections of specified thickness as given below for suction and liquid lines, all accessories as per specifications etc. as required:

NOTE: (1) The copper piping and piping circuit should be with minimum number of joints, which shall be attained by: (a) Using one end expanded tubes (b) bending the tubes instead of using elbow joints wherever 90 degree bending is required (2) Piping should be routed at site in such a manner, that brazed joints in the refrigeration piping are kept to a minimum (3) The makes of tube fittings shall be same as that of tubes (4) The thickness of fittings used shall be same as that of the pipe

Copper Discharge Pipe (soft drawn) with tube thickness 1.2 mm with 19 mm thick insulation (size / dia of pipe shall be as per OEM's design conditions for 7.5 TR inverter ductable AC as per item no. 2)

Copper Suction Pipe (hard drawn) with tube thickness 1.2 mm with 19 mm thick insulation (size / dia of pipe shall be as per OEM's design conditions for 7.5 TR inverter ductable AC as per item no. 2)

Supplying and installing following size of perforated Hot Dipped Galvanised Iron Cable tray (galvanisation thickness not less than 50 microns) with perforation not more than 17.5% in convenient sections, joined with connectors, suspended from the ceiling / fixing on wall with GI suspenders including GI bolts and nuts, etc. as required.

225 mm width x 50 mm depth x 1.6 mm thickness

Supplying and laying of ISI marked CPVC pipe of 32 mm dia for draining of sweated water from AC evaporator unit including providing tee, joints, elbows, supports, thermal insulation to avoid further sweating, etc. wherever necessary etc. complete as required.

Fabricating, Providing and fixing M.S. iron frame fabricated with M.S. C-channel of size 100 mm x 50 mm x 6 mm (thick) for resting the condenser unit on the roof / floor of the building duly supported from the bottom as required including anticorrosive painting the framework, necessary masonry work, etc. complete as required.

Supplying and laying of ISI marked FR pvc insulated flexible copper cable of size 2 core x 1.5 sqmm of 1.1 kv grade including making connection etc. for communication between indoor and outdoor unit and other units, etc. through conduit complete as required. (Make: Havells / Finolex / KEI / RR Kabel / Gloster / NICCO / Polycab)

Supplying and laying of following size pvc insulated pvc sheathed XLPE armoured copper conductor cable of 1.1 kV grade including making connections etc. as required. (Make: Havells / Finolex / KEI / RR Kabel / Gloster / NICCO / Polycab)

3 core x 4.0 sqmm

4 core x 10 sqmm

Supplying and making end termination with brass compression gland and tinned copper lugs for following size of pvc insulated and pvc sheathed / XLPE copper conductor cable of 1.1 kV grade as required.

3 core x 4.0 sqmm

4 core x 10 sqmm

Providing and fixing 8 SWG dia GI wire on surface or in recess for loop earthing along with existing surface / recessed conduit / submain wiring / cable as required.

Providing and fixing insulated flexible canvass connection between evaporator unit and duct mouth made thick cotton with openable inspection aperture, suitable side frame fittable on the evaporator unit, nuts, bolts, gaskets and other sundry materials for proper fixing etc. as required.

Cleaning of inside surface of ducts of HVAC system by NADCA (National Air Duct Cleaners Association) certified agency using high power vaccum, robotic camera, air hammer, special nozzle air sweep and other required accessories including checking of of dust level before and after cleaning using colur video inspection method to ascertain the quality of cleaning etc. upto the satisfaction of the Engineer-in-charge.

Supplying and fixing 100 A, 30 KA, FP MCCB with thermomagnetic release and terminal spreaders in existing cubicle panel board including drilling holes in cubicle panel, making connections etc. as required. (Make: L&T / Havells / Siemens / ABB / Legrand / C&S)

Supplying and fixing of false ceiling cover below the ductable evaporator unit including removal of existing damaged false ceiling by providing exactly same material and colour of the existing false ceiling etc. as required.

FUND: NPN 18/23

SUB HEAD - 2 (AMC) (Supplementary agreement shall be formed) under ARMO Fund

Routine, Preventive and Breakdown maintenance of 7.5 TR inverter Ductable AC unit including its all accessories, condensers, evaporator units, time to time checking of refrigerant leakage, electrical circuits, etc. for smooth operation of the entire AC units during the defect liability period of 1 year after date of commissioning as per maintenance schedule. (Completely free of cost): 1st Year: 01 Job

Routine, Preventive and Breakdown maintenance of 7.5 TR inverter Ductable AC unit including its all accessories, condensers, evaporator units, time to time checking of refrigerant leakage, electrical circuits, etc. for smooth operation of the entire AC units after defect liability period of 1 year from the date of commissioning as per maintenance schedule. Any breakdown shall be attended within 4 hours of reporting. Spare parts required during breakdown maintenance shall be arranged by the Institute. Non-attendance of breakdown within 4 hours of reporting will lead to penalty @Rs.200 per hour till the time of attendance or maximum 10% of the contract value for AMC whichever occurs earlier (N.B.: 01 Job means during a period of one year)

2nd year

3rd year

4th year

5th year

6th year

(-) Less buy back of old existing Ductable AC unit including evaporator and condenser unit, refrigerant pipes, etc. as is where is basis. (Reserve price is Rs.65,000/-) (i.e. @Rs.6500/- per unit as is where is basis) NOTE: Bidder can not quote below Rs.6500.00 per each unit, quoting below this rate will liable to rejection of the bid without any notice