PROVN OF CENTRIFUGAL PUMP SET AND CONNECTED WORKS AND PROVN OF AUTO CHANGE OVER SWITCH FOR AIR CONDITIONERS INSTALLED AT UPS ROOM OF ICSC AT HQTC BANGLAORE

Supply, fixing, testing and commissioning of electronic Air Conditioner Duty Cycling Timer Controller suitable for automatic alternate operation of existing 1.5 TR to 2.0 TR Split Air Conditioners, operating on 230 Volts, single phase, 50 Hz AC supply, complete with microprocessor/ electronic timer having adjustable duty cycle, adjustable ON-delay timer for compressor restart protection, Auto /Manual mode selection, LED indications for Power ON, Timer ON, Auto Mode and Manual Mode operation, built-in control relays /contactors of suitable rating, terminal blocks, internal copper wiring and powder-coated sheet steel enclosure. The controller shall automatically switch operation between the two air conditioners at preset time intervals to ensure equal running hours and balanced wear of compressors and shall provide adjustable time delay for restarting the compressor after power failure /restoration. The controller shall be suitable for continuous operation in UPS rooms, communication rooms, server rooms and similar critical installations. Item includes taking connections from existing air conditioner control circuits, making necessary terminations, fixing on wall, testing of auto /manual operation, timer sequence, delay functions complete all as specified and as directed by Engr-in-charge.

Material and labour for submain wiring with two runs of PVC insulated multistranded copper conductor 4.0 sqmm and one run of earth continuity conductor with PVC insulated multistranded 4.0 sqmm copper conductor drawn in and including PVC conduit accessories laid on surfacesurface/ recessed of wall /roof etc., with accessories for two pin and earth plug and socket complete including connected to earth dolly complete all as specified and as directed by Engr-in-charge. Note: Two run of 4.00 sqmm single core cable and one run 4.00 sqmm earth wire including PVC conduit together will be measured as one unit.

Material and labour for submain wiring with two runs of PVC insulated multistranded copper conductor 4.0 sqmm and one run of earth continuity conductor with PVC insulated multistranded 4.0 sqmm copper conductor drawn in and including PVC casing caping accessories laid on surfacesurface/ recessed of wall /roof etc., with accessories for two pin and earth plug and socket complete including connected to earth dolly complete all as specified and as directed by Engr-in-charge. Note: Two run of 4.00 sqmm single core cable and one run 4.00 sqmm earth wire including PVC casing and capping together will be measured as one unit.

Material and labour for cutting hole into stone masonry wall not exc 450mm thick, built in cement mortar, using stone drilling machine for inserting 65mm dia (50.24 sqcm) PVC pipe including making good the disturbed surfaces complete all as specified and as directed by Engr-in-charge.

Supply and fix sheet metal enclosure for DB's double door SPN, 4 ways when MCBs to be used single pole and neutral, deep drawn with 200 Amps rated copper bus bar 230 Volt complete all as specified and as directed by Engr-in-charge.

Supply and fix MCB SPN, 40 Amps, 230 V, C-series with breaking capacity of 10 KA complete all as specified and as directed by Engr-in-charge.

Supply and fix MCB SP, 6-32 Amps, 230V, C-series with breaking capacity of 10KA complete all as specified and as directed by Engr-in-charge.

Supply, installation, testing and commissioning of Horizontal Centrifugal Pump Set of 7.5 HP capacity suitable for operation on 415 Volts, 3 Phase, 50 Hz AC supply, capable of delivering water against a total delivery head of 20m with minimum suction head of 6m, complete with centrifugal pump having cast iron casing, dynamically balanced bronze/ gunmetal impeller, stainless steel shaft, mechanical seal /gland packing arrangement, anti-friction bearings and directly coupled to a 7.5 HP squirrel cage induction motor, TEFC enclosure, IP-55 protection, Class-F insulation, mounted on common fabricated M.S. base frame including foundation bolts, grouting and alignment complete all as specified and as directed by Engr-in-charge.

M&L for Providing and laying cement concrete 1:2:4 type B-1 (Using 20mm graded crushed stone aggregate) as pump foundation/ pedestal for 7.5 HP horizontal centrifugal pump set including excavation in any type of soil, dressing, levelling, ramming, disposal of surplus earth within 50m lead, formwork, finishing top surface, embedding foundation bolts, curing, making pockets for holding down bolts, filling pockets with non-shrink cement mortar, grouting beneath base frame with approved non-shrink grout complete all as specified and as directed by Engr-in-charge. Note: The foundation shall be of adequate size to withstand vibration and operational loads of the pump and motor assembly. Foundation bolts shall be cast into concrete and aligned with base frame holes. After installation and alignment of the pump set, the gap between base frame and concrete foundation shall be filled with approved non-shrink grout. The foundation top shall be finished smooth and level to ensure proper alignment and vibration-free operation.

Supply, installation, testing and commissioning of fully automatic star-delta starter suitable for 7.5 HP, 415 Volts, 3 Phase, 50 Hz squirrel cage induction motor complete with sheet steel dust and vermin proof enclosure, TPN MCCB incomer, three AC-3 duty contactors, adjustable electronic timer, thermal overload relay, phase sequence and phase failure protection relay, under voltage and single phasing protection, ON/OFF push buttons, Auto/Manual selector switch, RYB phase indicating lamps, ammeter with selector switch and CTs, voltmeter with selector switch, internal copper control wiring, terminal blocks, cable glands, lugs and all accessories complete, suitable for continuous operation, including complete all as specified and as directed by Engr-in-charge.