Replacement of existing Dx-type ductable air-conditioning plant and other allied electrical sub-system at Seminar hall KTMD Building CSIR NAL Bengaluru 560017

Amount

Design, supply, installation, testing & commissioning of 14 HP capacity factory built outdoor type air cooled variable refrigerant flow(VRF) / variable refrigerant volume (VRV) condensing units suitable for cooling only, having hermetically sealed inverter type scroll compressors, microprocessor based controller, top discharge type condensing units, with R-410A / R - 407C refrigerant etc all complete as required. The unit shall deliver the rated capacity as per standards and work even up to 50°C ambient temperature without tripping. The unit shall be suitable to work on 400 V +/- 10%, 3 Phase, 50Hz AC power supply. The unit shall be filled with first charge of the refrigerant and ready for use as required. The COP at AHRI conditions shall not be less than 3.1 and IEER not less than 6.5. The condensing unit shall be installed on suitable size of MS iron angle frame / civil constructed foundation with necessary anti vibration pads / mounts, bolts & nuts, fasteners etc., as required. Note: The condenser unit shall be installed at Ground floor / terrace (third floor) of the building. The height of the building will be around 30 feet. The AC unit shall be shifted using necessary crane with proper boom with out damaging the building & other peripherals as per the site requirement considering all the safety aspects etc,. all complete as required.

Supply, Installation, testing and commissioning including vaccumiazation, pressure testing using nitrogen of following nominal sizes of soft/hard drawn copper refrigerant piping connected with out door & indoor systems, complete with fittings, suitable size of adjustable ring type hanger supports, jointing / brazing including all accessories. The refrigerent line shall be insulated using XPLE Class-O tubular insulation of type Class-O closed cell elastometric nitrile rubber tubular sleeves sections of specified thickness as given below for Suction and Liquid lines and all other accessories as per specifications all complete as required. Note: 1)The Copper Piping & Piping Circuit should be with Minimum Number of joints, whichshall be attained by : (i) Using One End Expanded Tubes (ii) 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.

6.4 mm dia (OD) (Soft drawn) with tube thickness 1.2 mm with 19 mm thick insulation

9.5 mm dia (OD) (Soft drawn) with tube thickness 1.2 mm with 19 mm thick insulation

12.7 mm dia (OD) (Soft drawn) with tube thickness 1.2 mm with 19 mm thick insulation

15.86 mm dia (OD) (Soft drawn) with tube thickness 1.2 mm with 19 mm thick insulation

19.1 mm dia (OD) (Hard drawn) with tube thickness 1.2 mm with 19 mm thick insulation

22.2 mm dia (OD) (Hard drawn) with tube thickness 1.2 mm with 19 mm thick insulation

Supplying and laying 25 mm X 5 mm copper strip at 0.50 metre below ground as strip earth electrode, including connection/ terminating with nut, bolt, spring, washer etc. as required. (Jointing shall be done by overlapping and with 2 sets of brass nut bolt & spring washer spaced at 50mm)

Supplying, installation, testing & commissioning sector panel suitable for 4-zone, complete with visual indications for short circuit fault, open circuit fault, fire condition and all other standard facilities as per IS:2189 with mimic diagram for all area / zone covered, complete with all connections, interconnections as required.

Supplying, installation, testing & commissioning of smoke detector with builtin LED and mounting base complete with all connections etc. as required.

Supplying, installation, testing & commissioning of manual call box of ABS type in surface / recess with stainless steel chain & hammer assembly complete with glass and push button etc. as required.

Supplying, installation, testing & commissioning response indicator on surface / recess having two LEDs metallic cover complete with all connections etc. as required

Supplying, installation, testing & commissioning fire alarm sounder with facility to make announcement, mounted in A.B.S. box with hinged cover plate & suitable for operation with amplifier i/c line matching transformer etc. complete as required.

Supplying & laying of 2x1.5 sqmm fire alarm armoured cable, 600/1000V rated with annealed copper conductor having XLPE insulation, steel wire armouring & FRLS outer sheath complete as required.

Supplying and installing 200 mm width X 50 mm depth X 1.6 mm thickness of perforated painted with powder coating M.S. cable trays with perforation not more than 17.5%, in convenient sections, joined with connectors, suspended from the ceiling with M.S. suspenders including bolts & nuts, painting suspenders etc as required.

Supplying and installing 200 mm width X 50 mm depth X 1.6 mm thickness size of perforated painted with powder coating M.S. cable trays bends with perforation not more than 17.5%,, joined with connectors, suspended from the ceiling with M.S. suspenders including bolts & nuts, painting suspenders etc as required.

Supplying and installing 225 mm width X 50 mm depth X 1.6 mm thickness size of perforated painted with powder coating M.S. cable trays Tee with perforation not more than 17.5%, joined with connectors, suspended from the ceiling with M.S. suspenders including bolts & nuts, painting suspenders etc as required.

Supply, installation, testing and commissioning of 1.5 Tr /1.6 Tr capacity 4-way flow VRV/VRF Compact Cassette Type Indoor ceiling mounted unit equipped with synthetic washable media pre-filter, fan section with low noise fan / dynamically balanced blower, multispeed motor, coil section with DX Copper coil, electronic expansion valve, outer cabinet, drain pump, grill, necessary supports, vibration isolation, cord less remote control etc., suitable for operation on single phase 230 V ± 10%, 50Hz AC supply, complete, as required. The unit shall have automatic force shut down provision in case of fire on receiving signal from BMS System. The cooling capacity of indoor unit will be at air inlet conditions of 27 Degree C DB and 19 Degree C WB temperature. The unit shall have provision for fresh air to connect PVC pipe and the unit shall be suitable to fix at 600 mm x 600 mm false ceiling grid all complete as required.

Design, manufacturing, supply, installation, testing & commissioning of variable refrigerant of variable refrigerant flow distribution REFNUTS (Y – Joints) in the copper refrigerant suction & liquid lines including insulation if any etc. as required.

Supply, laying, dressing, testing & commissioning of communication cabling of 4 core x 0.75 Sq.mm multi strand screened shielded copper control cabling as to interface between controller to individual unit covered with PVC pipe to be laid on wall / false ceiling and covered ceiling including supporting, clamping etc. all as required between controller to individual unit covered. (The size & make of the cable will be acceptable as per the OEM recommendations)

Supply & Installation of 25 mm Ø CPVC for drain water pipe of and duly insulated complete with fittings, accessories, bends, elbows, tees, wall sleeves, hangers, supports, anchors with 6 mm thick tubular insulation of closed cell elastomeric nitrile rubber as required. (The dia of the pipe will be acceptable as per the OEM recommendations)

Supply & Installation of 40 mm Ø PVC for fresh air pipe complete with fittings, accessories, bends, elbows, tees, end termination Cap Mesh Screen Vent Cover, wall sleeves, hangers, supports, anchors required. (The dia of the pipe will be acceptable as per the OEM recommendations)

Supply of 18 W, LED Warm White (3000K) cealing mounting round panel light with high efficient LED & glare free opal diffuser having IP 20 protection luminaries with CRCA / aluminum housing enclosure including control electronic gear etc. all complete and suitable for operation on 230V, 50 Hz, AC power supply as required.

Dismantling, of existing 2 nos of 5.5 Tr of condensing unit, ceiling mounted type ductalbe evaparator, copper piping, duct, grills and etc. After dismantling, the indoor, out door units and all accessories shall be shifted to CSIR NAL central stores. The distance between location & central stores will be around 300 meters.

Dismantling of existing false ceiling made out of using plast of parries (PoP) with other accessories. All the dementalled debris shall be removed from the site and shifting to outside of the CSIR-NAL campus .

Supply, installation, testing & commissioning of maintenance free earthing system using 3000 mm length, 77-80 mm outer dia copper bonded M.S. Pipe as primary electrode. The Copper bonded pipe electrodes shall be of molecularly bonding of pure electrolytic copper (99.9%) with the thickness/bonding of ranging from 50 to 100 microns. The hollow space of the electrode shall be duly filled using high conductive and non-corrosive compound to withstand fault current lands on the electrode. Both the ends of the pipe / electrode shall be permanently sealed and the top portion of the earth electrode shall be provided with extended lead holes on the terminal for connecting to the earth terminals. The electrode shall be directly buried in the ground. The earth pit shall be refilled using environment friendly low resistance grounding minerals having a combination of graphite & natural earth minerals to form a low resistance zone all round the electrode. The required quantity of water shall be poured inside the earth pit as per the OEM recommendations as required. The necessary earth chamber shall be provided using heavy duty weather proof plastic cover with locking facility.

Providing and fixing tiled false Ceiling of Acoustical suspended ceiling system with fine fissured tiles having board edges of M/s Armastrong or equivalent with following specifications(a) The tiles shall have humidity resistance of 99% RH,NRC 0.55, light Reflectance>80%, Thermal conductivity k=0.052-0.057 w/moc, color white, fire performance class O/class 1(Bs-476) with life time warranteeagainst sag in module size of 600mmx600mmx16mm laid on 24xll-Hot Dipped galvanised steel suspension system having rotary stitching on the main runner, 1200mm and 600mm cross tees. in true horizontal level suspended on inter locking metal grid of hot dipped galvanised steel sections ( galvanized @ 170 gsm/sqm.) consisting of main "T" runner with suitably spaced at joints to get required length and of size 24x38mm made from 0.30mm thick (minimum) sheet spaced at 1200mm center to center and cross "T" of size 24x25mm made of 0.30mm thick (minimum) sheet, 1200mm long spaced between main "T" at 600mm center to center to form a grid of 1200x600 mm and secondary cross "T" of length 600mm and size 24x25mm made of 0.30 mm thick (minimum) sheet to be interlocked at middle of the 1200x600mm panel to form grids of 600x600mm and wall angle of 21 x 21 x 0.3mm and laying false ceiling tiles of approved texture in the grid including, wherever, required, cutting/making, opening for services like diffusers, grills, light fittings, fixtures, smoke detectors etc.

AKEY ELECTRO TECHNIQUES